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Import 2.3.18pre1
[davej-history.git] / arch / sparc / mm / srmmu.c
blob10f45263629cbb1a6c912674124d30372f00c6d0
1 /* $Id: srmmu.c,v 1.191 1999/08/31 06:54:38 davem Exp $
2 * srmmu.c: SRMMU specific routines for memory management.
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1995 Peter A. Zaitcev (zaitcev@ithil.mcst.ru)
6 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 */
9
10 #include <linux/config.h>
11 #include <linux/kernel.h>
12 #include <linux/mm.h>
13 #include <linux/malloc.h>
14 #include <linux/vmalloc.h>
15 #include <linux/pagemap.h>
16 #include <linux/init.h>
17 #include <linux/blk.h>
18 #include <linux/spinlock.h>
19
20 #include <asm/page.h>
21 #include <asm/pgtable.h>
22 #include <asm/io.h>
23 #include <asm/kdebug.h>
24 #include <asm/vaddrs.h>
25 #include <asm/traps.h>
26 #include <asm/smp.h>
27 #include <asm/mbus.h>
28 #include <asm/cache.h>
29 #include <asm/oplib.h>
30 #include <asm/sbus.h>
31 #include <asm/asi.h>
32 #include <asm/msi.h>
33 #include <asm/a.out.h>
34 #include <asm/mmu_context.h>
35 #include <asm/io-unit.h>
36
37 /* Now the cpu specific definitions. */
38 #include <asm/viking.h>
39 #include <asm/mxcc.h>
40 #include <asm/ross.h>
41 #include <asm/tsunami.h>
42 #include <asm/swift.h>
43 #include <asm/turbosparc.h>
44
45 #include <asm/btfixup.h>
46
47 /* #define DEBUG_MAP_KERNEL */
48 /* #define PAGESKIP_DEBUG */
49
50 enum mbus_module srmmu_modtype;
51 unsigned int hwbug_bitmask;
52 int vac_cache_size;
53 int vac_line_size;
54 int vac_badbits;
55
56 extern unsigned long sparc_iobase_vaddr;
57
58 #ifdef __SMP__
59 #define FLUSH_BEGIN(mm)
60 #define FLUSH_END
61 #else
62 #define FLUSH_BEGIN(mm) if((mm)->context != NO_CONTEXT) {
63 #define FLUSH_END }
64 #endif
65
66 static int phys_mem_contig;
67 BTFIXUPDEF_SETHI(page_contig_offset)
68
69 BTFIXUPDEF_CALL(void, ctxd_set, ctxd_t *, pgd_t *)
70 BTFIXUPDEF_CALL(void, pmd_set, pmd_t *, pte_t *)
71
72 #define ctxd_set(ctxp,pgdp) BTFIXUP_CALL(ctxd_set)(ctxp,pgdp)
73 #define pmd_set(pmdp,ptep) BTFIXUP_CALL(pmd_set)(pmdp,ptep)
74
75 BTFIXUPDEF_CALL(void, flush_page_for_dma, unsigned long)
76 BTFIXUPDEF_CALL(void, flush_chunk, unsigned long)
77
78 #define flush_page_for_dma(page) BTFIXUP_CALL(flush_page_for_dma)(page)
79 int flush_page_for_dma_global = 1;
80 #define flush_chunk(chunk) BTFIXUP_CALL(flush_chunk)(chunk)
81 #ifdef __SMP__
82 BTFIXUPDEF_CALL(void, local_flush_page_for_dma, unsigned long)
83
84 #define local_flush_page_for_dma(page) BTFIXUP_CALL(local_flush_page_for_dma)(page)
85 #endif
86
87 static struct srmmu_stats {
88 int invall;
89 int invpg;
90 int invrnge;
91 int invmm;
92 } module_stats;
93
94 char *srmmu_name;
95
96 ctxd_t *srmmu_ctx_table_phys;
97 ctxd_t *srmmu_context_table;
98
99 /* Don't change this without changing access to this
100 * in arch/sparc/mm/viking.S
101 */
102 static struct srmmu_trans {
103 unsigned long vbase;
104 unsigned long pbase;
105 unsigned long size;
106 } srmmu_map[SPARC_PHYS_BANKS];
107
108 #define SRMMU_HASHSZ 256
109
110 /* Not static, viking.S uses it. */
111 unsigned long srmmu_v2p_hash[SRMMU_HASHSZ];
112 static unsigned long srmmu_p2v_hash[SRMMU_HASHSZ];
113
114 #define srmmu_ahashfn(addr) ((addr) >> 24)
115
116 int viking_mxcc_present = 0;
117 static spinlock_t srmmu_context_spinlock = SPIN_LOCK_UNLOCKED;
118
119 /* Physical memory can be _very_ non-contiguous on the sun4m, especially
120 * the SS10/20 class machines and with the latest openprom revisions.
121 * So we have to do a quick lookup.
122 * We use the same for SS1000/SC2000 as a fall back, when phys memory is
123 * non-contiguous.
124 */
125 static inline unsigned long srmmu_v2p(unsigned long vaddr)
126 {
127 unsigned long off = srmmu_v2p_hash[srmmu_ahashfn(vaddr)];
128
129 return (vaddr + off);
130 }
131
132 static inline unsigned long srmmu_p2v(unsigned long paddr)
133 {
134 unsigned long off = srmmu_p2v_hash[srmmu_ahashfn(paddr)];
135
136 if (off != 0xffffffffUL)
137 return (paddr - off);
138 else
139 return 0xffffffffUL;
140 }
141
142 /* Physical memory on most SS1000/SC2000 can be contiguous, so we handle that case
143 * as a special case to make things faster.
144 */
145 /* FIXME: gcc is stupid here and generates very very bad code in this
146 * heavily used routine. So we help it a bit. */
147 static inline unsigned long srmmu_c_v2p(unsigned long vaddr)
148 {
149 #if KERNBASE != 0xf0000000
150 if (vaddr >= KERNBASE) return vaddr - KERNBASE;
151 return vaddr - BTFIXUP_SETHI(page_contig_offset);
152 #else
153 register unsigned long kernbase;
154
155 __asm__ ("sethi %%hi(0xf0000000), %0" : "=r"(kernbase));
156 return vaddr - ((vaddr >= kernbase) ? kernbase : BTFIXUP_SETHI(page_contig_offset));
157 #endif
158 }
159
160 static inline unsigned long srmmu_c_p2v(unsigned long paddr)
161 {
162 #if KERNBASE != 0xf0000000
163 if (paddr < (0xfd000000 - KERNBASE)) return paddr + KERNBASE;
164 return (paddr + BTFIXUP_SETHI(page_contig_offset));
165 #else
166 register unsigned long kernbase;
167 register unsigned long limit;
168
169 __asm__ ("sethi %%hi(0x0d000000), %0" : "=r"(limit));
170 __asm__ ("sethi %%hi(0xf0000000), %0" : "=r"(kernbase));
171
172 return paddr + ((paddr < limit) ? kernbase : BTFIXUP_SETHI(page_contig_offset));
173 #endif
174 }
175
176 /* On boxes where there is no lots_of_ram, KERNBASE is mapped to PA<0> and highest
177 PA is below 0x0d000000, we can optimize even more :) */
178 static inline unsigned long srmmu_s_v2p(unsigned long vaddr)
179 {
180 return vaddr - PAGE_OFFSET;
181 }
182
183 static inline unsigned long srmmu_s_p2v(unsigned long paddr)
184 {
185 return paddr + PAGE_OFFSET;
186 }
187
188 /* In general all page table modifications should use the V8 atomic
189 * swap instruction. This insures the mmu and the cpu are in sync
190 * with respect to ref/mod bits in the page tables.
191 */
192 static inline unsigned long srmmu_swap(unsigned long *addr, unsigned long value)
193 {
194 __asm__ __volatile__("swap [%2], %0" : "=&r" (value) : "0" (value), "r" (addr));
195 return value;
196 }
197
198 /* Functions really use this, not srmmu_swap directly. */
199 #define srmmu_set_entry(ptr, newentry) srmmu_swap((unsigned long *) (ptr), (newentry))
200
201 #ifdef PAGESKIP_DEBUG
202 #define PGSKIP_DEBUG(from,to) prom_printf("PG_skip %ld->%ld\n", (long)(from), (long)(to)); printk("PG_skip %ld->%ld\n", (long)(from), (long)(to))
203 #else
204 #define PGSKIP_DEBUG(from,to) do { } while (0)
205 #endif
206
207 void __init srmmu_frob_mem_map(unsigned long start_mem)
208 {
209 unsigned long bank_start, bank_end = 0;
210 unsigned long addr;
211 int i;
212
213 /* First, mark all pages as invalid. */
214 for(addr = PAGE_OFFSET; MAP_NR(addr) < max_mapnr; addr += PAGE_SIZE)
215 mem_map[MAP_NR(addr)].flags |= (1<<PG_reserved);
216
217 /* Next, pg[0-3] is sun4c cruft, so we can free it... */
218 mem_map[MAP_NR(pg0)].flags &= ~(1<<PG_reserved);
219 mem_map[MAP_NR(pg1)].flags &= ~(1<<PG_reserved);
220 mem_map[MAP_NR(pg2)].flags &= ~(1<<PG_reserved);
221 mem_map[MAP_NR(pg3)].flags &= ~(1<<PG_reserved);
222
223 start_mem = PAGE_ALIGN(start_mem);
224 for(i = 0; srmmu_map[i].size; i++) {
225 bank_start = srmmu_map[i].vbase;
226
227 /* Making a one or two pages PG_skip holes
228 * is not necessary. We add one more because
229 * we must set the PG_skip flag on the first
230 * two mem_map[] entries for the hole. Go and
231 * see the mm/filemap.c:shrink_mmap() loop for
232 * details. -DaveM
233 */
234 if (i && bank_start - bank_end > 3 * PAGE_SIZE) {
235 mem_map[MAP_NR(bank_end)].flags |= (1<<PG_skip);
236 mem_map[MAP_NR(bank_end)].next_hash = mem_map + MAP_NR(bank_start);
237 mem_map[MAP_NR(bank_end)+1UL].flags |= (1<<PG_skip);
238 mem_map[MAP_NR(bank_end)+1UL].next_hash = mem_map + MAP_NR(bank_start);
239 PGSKIP_DEBUG(MAP_NR(bank_end), MAP_NR(bank_start));
240 if (bank_end > KERNBASE && bank_start < KERNBASE) {
241 mem_map[0].flags |= (1<<PG_skip);
242 mem_map[0].next_hash = mem_map + MAP_NR(bank_start);
243 mem_map[1].flags |= (1<<PG_skip);
244 mem_map[1].next_hash = mem_map + MAP_NR(bank_start);
245 PGSKIP_DEBUG(0, MAP_NR(bank_start));
246 }
247 }
248
249 bank_end = bank_start + srmmu_map[i].size;
250 while(bank_start < bank_end) {
251 set_bit(MAP_NR(bank_start) >> 8, sparc_valid_addr_bitmap);
252 if((bank_start >= KERNBASE) &&
253 (bank_start < start_mem)) {
254 bank_start += PAGE_SIZE;
255 continue;
256 }
257 mem_map[MAP_NR(bank_start)].flags &= ~(1<<PG_reserved);
258 bank_start += PAGE_SIZE;
259 }
260
261 if (bank_end == 0xfd000000)
262 bank_end = PAGE_OFFSET;
263 }
264
265 if (bank_end < KERNBASE) {
266 mem_map[MAP_NR(bank_end)].flags |= (1<<PG_skip);
267 mem_map[MAP_NR(bank_end)].next_hash = mem_map + MAP_NR(KERNBASE);
268 mem_map[MAP_NR(bank_end)+1UL].flags |= (1<<PG_skip);
269 mem_map[MAP_NR(bank_end)+1UL].next_hash = mem_map + MAP_NR(KERNBASE);
270 PGSKIP_DEBUG(MAP_NR(bank_end), MAP_NR(KERNBASE));
271 } else if (MAP_NR(bank_end) < max_mapnr) {
272 mem_map[MAP_NR(bank_end)].flags |= (1<<PG_skip);
273 mem_map[MAP_NR(bank_end)+1UL].flags |= (1<<PG_skip);
274 if (mem_map[0].flags & (1 << PG_skip)) {
275 mem_map[MAP_NR(bank_end)].next_hash = mem_map[0].next_hash;
276 mem_map[MAP_NR(bank_end)+1UL].next_hash = mem_map[0].next_hash;
277 PGSKIP_DEBUG(MAP_NR(bank_end), mem_map[0].next_hash - mem_map);
278 } else {
279 mem_map[MAP_NR(bank_end)].next_hash = mem_map;
280 mem_map[MAP_NR(bank_end)+1UL].next_hash = mem_map;
281 PGSKIP_DEBUG(MAP_NR(bank_end), 0);
282 }
283 }
284 }
285
286 /* The very generic SRMMU page table operations. */
287 static inline int srmmu_device_memory(unsigned long x)
288 {
289 return ((x & 0xF0000000) != 0);
290 }
291
292 static unsigned long srmmu_pgd_page(pgd_t pgd)
293 { return srmmu_device_memory(pgd_val(pgd))?~0:srmmu_p2v((pgd_val(pgd) & SRMMU_PTD_PMASK) << 4); }
294
295 static unsigned long srmmu_pmd_page(pmd_t pmd)
296 { return srmmu_device_memory(pmd_val(pmd))?~0:srmmu_p2v((pmd_val(pmd) & SRMMU_PTD_PMASK) << 4); }
297
298 static unsigned long srmmu_pte_page(pte_t pte)
299 { return srmmu_device_memory(pte_val(pte))?~0:srmmu_p2v((pte_val(pte) & SRMMU_PTE_PMASK) << 4); }
300
301 static unsigned long srmmu_c_pgd_page(pgd_t pgd)
302 { return srmmu_device_memory(pgd_val(pgd))?~0:srmmu_c_p2v((pgd_val(pgd) & SRMMU_PTD_PMASK) << 4); }
303
304 static unsigned long srmmu_c_pmd_page(pmd_t pmd)
305 { return srmmu_device_memory(pmd_val(pmd))?~0:srmmu_c_p2v((pmd_val(pmd) & SRMMU_PTD_PMASK) << 4); }
306
307 static unsigned long srmmu_c_pte_page(pte_t pte)
308 { return srmmu_device_memory(pte_val(pte))?~0:srmmu_c_p2v((pte_val(pte) & SRMMU_PTE_PMASK) << 4); }
309
310 static unsigned long srmmu_s_pgd_page(pgd_t pgd)
311 { return srmmu_device_memory(pgd_val(pgd))?~0:srmmu_s_p2v((pgd_val(pgd) & SRMMU_PTD_PMASK) << 4); }
312
313 static unsigned long srmmu_s_pmd_page(pmd_t pmd)
314 { return srmmu_device_memory(pmd_val(pmd))?~0:srmmu_s_p2v((pmd_val(pmd) & SRMMU_PTD_PMASK) << 4); }
315
316 static unsigned long srmmu_s_pte_page(pte_t pte)
317 { return srmmu_device_memory(pte_val(pte))?~0:srmmu_s_p2v((pte_val(pte) & SRMMU_PTE_PMASK) << 4); }
318
319 static inline int srmmu_pte_none(pte_t pte)
320 { return !(pte_val(pte) & 0xFFFFFFF); }
321 static inline int srmmu_pte_present(pte_t pte)
322 { return ((pte_val(pte) & SRMMU_ET_MASK) == SRMMU_ET_PTE); }
323
324 static inline void srmmu_pte_clear(pte_t *ptep) { set_pte(ptep, __pte(0)); }
325
326 static inline int srmmu_pmd_none(pmd_t pmd)
327 { return !(pmd_val(pmd) & 0xFFFFFFF); }
328 static inline int srmmu_pmd_bad(pmd_t pmd)
329 { return (pmd_val(pmd) & SRMMU_ET_MASK) != SRMMU_ET_PTD; }
330
331 static inline int srmmu_pmd_present(pmd_t pmd)
332 { return ((pmd_val(pmd) & SRMMU_ET_MASK) == SRMMU_ET_PTD); }
333
334 static inline void srmmu_pmd_clear(pmd_t *pmdp) { set_pte((pte_t *)pmdp, __pte(0)); }
335
336 static inline int srmmu_pgd_none(pgd_t pgd)
337 { return !(pgd_val(pgd) & 0xFFFFFFF); }
338
339 static inline int srmmu_pgd_bad(pgd_t pgd)
340 { return (pgd_val(pgd) & SRMMU_ET_MASK) != SRMMU_ET_PTD; }
341
342 static inline int srmmu_pgd_present(pgd_t pgd)
343 { return ((pgd_val(pgd) & SRMMU_ET_MASK) == SRMMU_ET_PTD); }
344
345 static inline void srmmu_pgd_clear(pgd_t * pgdp) { set_pte((pte_t *)pgdp, __pte(0)); }
346
347 static inline int srmmu_pte_write(pte_t pte) { return pte_val(pte) & SRMMU_WRITE; }
348 static inline int srmmu_pte_dirty(pte_t pte) { return pte_val(pte) & SRMMU_DIRTY; }
349 static inline int srmmu_pte_young(pte_t pte) { return pte_val(pte) & SRMMU_REF; }
350
351 static inline pte_t srmmu_pte_wrprotect(pte_t pte) { return __pte(pte_val(pte) & ~SRMMU_WRITE);}
352 static inline pte_t srmmu_pte_mkclean(pte_t pte) { return __pte(pte_val(pte) & ~SRMMU_DIRTY);}
353 static inline pte_t srmmu_pte_mkold(pte_t pte) { return __pte(pte_val(pte) & ~SRMMU_REF);}
354 static inline pte_t srmmu_pte_mkwrite(pte_t pte) { return __pte(pte_val(pte) | SRMMU_WRITE);}
355 static inline pte_t srmmu_pte_mkdirty(pte_t pte) { return __pte(pte_val(pte) | SRMMU_DIRTY);}
356 static inline pte_t srmmu_pte_mkyoung(pte_t pte) { return __pte(pte_val(pte) | SRMMU_REF);}
357
358 /*
359 * Conversion functions: convert a page and protection to a page entry,
360 * and a page entry and page directory to the page they refer to.
361 */
362 static pte_t srmmu_mk_pte(unsigned long page, pgprot_t pgprot)
363 { return __pte(((srmmu_v2p(page)) >> 4) | pgprot_val(pgprot)); }
364
365 static pte_t srmmu_c_mk_pte(unsigned long page, pgprot_t pgprot)
366 { return __pte(((srmmu_c_v2p(page)) >> 4) | pgprot_val(pgprot)); }
367
368 static pte_t srmmu_s_mk_pte(unsigned long page, pgprot_t pgprot)
369 { return __pte(((srmmu_s_v2p(page)) >> 4) | pgprot_val(pgprot)); }
370
371 static pte_t srmmu_mk_pte_phys(unsigned long page, pgprot_t pgprot)
372 { return __pte(((page) >> 4) | pgprot_val(pgprot)); }
373
374 static pte_t srmmu_mk_pte_io(unsigned long page, pgprot_t pgprot, int space)
375 {
376 return __pte(((page) >> 4) | (space << 28) | pgprot_val(pgprot));
377 }
378
379 static void srmmu_ctxd_set(ctxd_t *ctxp, pgd_t *pgdp)
380 {
381 set_pte((pte_t *)ctxp, (SRMMU_ET_PTD | (srmmu_v2p((unsigned long) pgdp) >> 4)));
382 }
383
384 static void srmmu_pgd_set(pgd_t * pgdp, pmd_t * pmdp)
385 {
386 set_pte((pte_t *)pgdp, (SRMMU_ET_PTD | (srmmu_v2p((unsigned long) pmdp) >> 4)));
387 }
388
389 static void srmmu_pmd_set(pmd_t * pmdp, pte_t * ptep)
390 {
391 set_pte((pte_t *)pmdp, (SRMMU_ET_PTD | (srmmu_v2p((unsigned long) ptep) >> 4)));
392 }
393
394 static void srmmu_c_ctxd_set(ctxd_t *ctxp, pgd_t *pgdp)
395 {
396 set_pte((pte_t *)ctxp, (SRMMU_ET_PTD | (srmmu_c_v2p((unsigned long) pgdp) >> 4)));
397 }
398
399 static void srmmu_c_pgd_set(pgd_t * pgdp, pmd_t * pmdp)
400 {
401 set_pte((pte_t *)pgdp, (SRMMU_ET_PTD | (srmmu_c_v2p((unsigned long) pmdp) >> 4)));
402 }
403
404 static void srmmu_c_pmd_set(pmd_t * pmdp, pte_t * ptep)
405 {
406 set_pte((pte_t *)pmdp, (SRMMU_ET_PTD | (srmmu_c_v2p((unsigned long) ptep) >> 4)));
407 }
408
409 static void srmmu_s_ctxd_set(ctxd_t *ctxp, pgd_t *pgdp)
410 {
411 set_pte((pte_t *)ctxp, (SRMMU_ET_PTD | (srmmu_s_v2p((unsigned long) pgdp) >> 4)));
412 }
413
414 static void srmmu_s_pgd_set(pgd_t * pgdp, pmd_t * pmdp)
415 {
416 set_pte((pte_t *)pgdp, (SRMMU_ET_PTD | (srmmu_s_v2p((unsigned long) pmdp) >> 4)));
417 }
418
419 static void srmmu_s_pmd_set(pmd_t * pmdp, pte_t * ptep)
420 {
421 set_pte((pte_t *)pmdp, (SRMMU_ET_PTD | (srmmu_s_v2p((unsigned long) ptep) >> 4)));
422 }
423
424 static inline pte_t srmmu_pte_modify(pte_t pte, pgprot_t newprot)
425 {
426 return __pte((pte_val(pte) & SRMMU_CHG_MASK) | pgprot_val(newprot));
427 }
428
429 /* to find an entry in a top-level page table... */
430 static inline pgd_t *srmmu_pgd_offset(struct mm_struct * mm, unsigned long address)
431 {
432 return mm->pgd + (address >> SRMMU_PGDIR_SHIFT);
433 }
434
435 /* Find an entry in the second-level page table.. */
436 static inline pmd_t *srmmu_pmd_offset(pgd_t * dir, unsigned long address)
437 {
438 return (pmd_t *) srmmu_pgd_page(*dir) + ((address >> SRMMU_PMD_SHIFT) & (SRMMU_PTRS_PER_PMD - 1));
439 }
440
441 /* Find an entry in the third-level page table.. */
442 static inline pte_t *srmmu_pte_offset(pmd_t * dir, unsigned long address)
443 {
444 return (pte_t *) srmmu_pmd_page(*dir) + ((address >> PAGE_SHIFT) & (SRMMU_PTRS_PER_PTE - 1));
445 }
446
447 static inline pmd_t *srmmu_c_pmd_offset(pgd_t * dir, unsigned long address)
448 {
449 return (pmd_t *) srmmu_c_pgd_page(*dir) + ((address >> SRMMU_PMD_SHIFT) & (SRMMU_PTRS_PER_PMD - 1));
450 }
451
452 static inline pte_t *srmmu_c_pte_offset(pmd_t * dir, unsigned long address)
453 {
454 return (pte_t *) srmmu_c_pmd_page(*dir) + ((address >> PAGE_SHIFT) & (SRMMU_PTRS_PER_PTE - 1));
455 }
456
457 static inline pmd_t *srmmu_s_pmd_offset(pgd_t * dir, unsigned long address)
458 {
459 return (pmd_t *) srmmu_s_pgd_page(*dir) + ((address >> SRMMU_PMD_SHIFT) & (SRMMU_PTRS_PER_PMD - 1));
460 }
461
462 static inline pte_t *srmmu_s_pte_offset(pmd_t * dir, unsigned long address)
463 {
464 return (pte_t *) srmmu_s_pmd_page(*dir) + ((address >> PAGE_SHIFT) & (SRMMU_PTRS_PER_PTE - 1));
465 }
466
467 /* This must update the context table entry for this process. */
468 static void srmmu_update_rootmmu_dir(struct task_struct *tsk, pgd_t *pgdp)
469 {
470 if(tsk->mm->context != NO_CONTEXT &&
471 tsk->mm->pgd != pgdp) {
472 flush_cache_mm(tsk->mm);
473 ctxd_set(&srmmu_context_table[tsk->mm->context], pgdp);
474 flush_tlb_mm(tsk->mm);
475 }
476 }
477
478 static inline pte_t *srmmu_get_pte_fast(void)
479 {
480 struct page *ret;
481
482 spin_lock(&pte_spinlock);
483 if ((ret = (struct page *)pte_quicklist) != NULL) {
484 unsigned int mask = (unsigned int)ret->pprev_hash;
485 unsigned int tmp, off;
486
487 if (mask & 0xff)
488 for (tmp = 0x001, off = 0; (mask & tmp) == 0; tmp <<= 1, off += 256);
489 else
490 for (tmp = 0x100, off = 2048; (mask & tmp) == 0; tmp <<= 1, off += 256);
491 (unsigned int)ret->pprev_hash = mask & ~tmp;
492 if (!(mask & ~tmp))
493 pte_quicklist = (unsigned long *)ret->next_hash;
494 ret = (struct page *)(page_address(ret) + off);
495 pgtable_cache_size--;
496 }
497 spin_unlock(&pte_spinlock);
498 return (pte_t *)ret;
499 }
500
501 static inline pte_t *srmmu_get_pte_slow(void)
502 {
503 pte_t *ret;
504 struct page *page;
505
506 ret = (pte_t *)get_free_page(GFP_KERNEL);
507 if (ret) {
508 page = mem_map + MAP_NR(ret);
509 flush_chunk((unsigned long)ret);
510 (unsigned int)page->pprev_hash = 0xfffe;
511 spin_lock(&pte_spinlock);
512 (unsigned long *)page->next_hash = pte_quicklist;
513 pte_quicklist = (unsigned long *)page;
514 pgtable_cache_size += 15;
515 }
516 return ret;
517 }
518
519 static inline pgd_t *srmmu_get_pgd_fast(void)
520 {
521 struct page *ret;
522
523 spin_lock(&pgd_spinlock);
524 if ((ret = (struct page *)pgd_quicklist) != NULL) {
525 unsigned int mask = (unsigned int)ret->pprev_hash;
526 unsigned int tmp, off;
527
528 for (tmp = 0x001, off = 0; (mask & tmp) == 0; tmp <<= 1, off += 1024);
529 (unsigned int)ret->pprev_hash = mask & ~tmp;
530 if (!(mask & ~tmp))
531 pgd_quicklist = (unsigned long *)ret->next_hash;
532 ret = (struct page *)(page_address(ret) + off);
533 pgd_cache_size--;
534 }
535 spin_unlock(&pgd_spinlock);
536 return (pgd_t *)ret;
537 }
538
539 static inline pgd_t *srmmu_get_pgd_slow(void)
540 {
541 pgd_t *ret;
542 struct page *page;
543
544 ret = (pgd_t *)__get_free_page(GFP_KERNEL);
545 if (ret) {
546 pgd_t *init = pgd_offset(&init_mm, 0);
547 memset(ret + (0 * PTRS_PER_PGD), 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
548 memcpy(ret + (0 * PTRS_PER_PGD) + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
549 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
550 memset(ret + (1 * PTRS_PER_PGD), 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
551 memcpy(ret + (1 * PTRS_PER_PGD) + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
552 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
553 memset(ret + (2 * PTRS_PER_PGD), 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
554 memcpy(ret + (2 * PTRS_PER_PGD) + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
555 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
556 memset(ret + (3 * PTRS_PER_PGD), 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
557 memcpy(ret + (3 * PTRS_PER_PGD) + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
558 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
559 page = mem_map + MAP_NR(ret);
560 flush_chunk((unsigned long)ret);
561 (unsigned int)page->pprev_hash = 0xe;
562 spin_lock(&pgd_spinlock);
563 (unsigned long *)page->next_hash = pgd_quicklist;
564 pgd_quicklist = (unsigned long *)page;
565 pgd_cache_size += 3;
566 spin_unlock(&pgd_spinlock);
567 }
568 return ret;
569 }
570
571 static void srmmu_free_pte_slow(pte_t *pte)
572 {
573 }
574
575 static void srmmu_free_pgd_slow(pgd_t *pgd)
576 {
577 }
578
579 static inline void srmmu_pte_free(pte_t *pte)
580 {
581 struct page *page = mem_map + MAP_NR(pte);
582
583 spin_lock(&pte_spinlock);
584 if (!page->pprev_hash) {
585 (unsigned long *)page->next_hash = pte_quicklist;
586 pte_quicklist = (unsigned long *)page;
587 }
588 (unsigned int)page->pprev_hash |= (1 << ((((unsigned long)pte) >> 8) & 15));
589 pgtable_cache_size++;
590 spin_unlock(&pte_spinlock);
591 }
592
593 static pte_t *srmmu_pte_alloc(pmd_t * pmd, unsigned long address)
594 {
595 address = (address >> PAGE_SHIFT) & (SRMMU_PTRS_PER_PTE - 1);
596 if(srmmu_pmd_none(*pmd)) {
597 pte_t *page = srmmu_get_pte_fast();
598
599 if (page) {
600 pmd_set(pmd, page);
601 return page + address;
602 }
603 page = srmmu_get_pte_slow();
604 if(srmmu_pmd_none(*pmd)) {
605 if(page) {
606 spin_unlock(&pte_spinlock);
607 pmd_set(pmd, page);
608 return page + address;
609 }
610 pmd_set(pmd, BAD_PAGETABLE);
611 return NULL;
612 }
613 if (page) {
614 (unsigned int)(((struct page *)pte_quicklist)->pprev_hash) = 0xffff;
615 pgtable_cache_size++;
616 spin_unlock(&pte_spinlock);
617 }
618 }
619 if(srmmu_pmd_bad(*pmd)) {
620 printk("Bad pmd in pte_alloc: %08lx\n", pmd_val(*pmd));
621 pmd_set(pmd, BAD_PAGETABLE);
622 return NULL;
623 }
624 return ((pte_t *) pmd_page(*pmd)) + address;
625 }
626
627 /* Real three-level page tables on SRMMU. */
628 static void srmmu_pmd_free(pmd_t * pmd)
629 {
630 return srmmu_pte_free((pte_t *)pmd);
631 }
632
633 static pmd_t *srmmu_pmd_alloc(pgd_t * pgd, unsigned long address)
634 {
635 address = (address >> SRMMU_PMD_SHIFT) & (SRMMU_PTRS_PER_PMD - 1);
636 if(srmmu_pgd_none(*pgd)) {
637 pmd_t *page = (pmd_t *)srmmu_get_pte_fast();
638
639 if (page) {
640 pgd_set(pgd, page);
641 return page + address;
642 }
643 page = (pmd_t *)srmmu_get_pte_slow();
644 if(srmmu_pgd_none(*pgd)) {
645 if(page) {
646 spin_unlock(&pte_spinlock);
647 pgd_set(pgd, page);
648 return page + address;
649 }
650 pgd_set(pgd, (pmd_t *) BAD_PAGETABLE);
651 return NULL;
652 }
653 if (page) {
654 (unsigned int)(((struct page *)pte_quicklist)->pprev_hash) = 0xffff;
655 pgtable_cache_size++;
656 spin_unlock(&pte_spinlock);
657 }
658 }
659 if(srmmu_pgd_bad(*pgd)) {
660 printk("Bad pgd in pmd_alloc: %08lx\n", pgd_val(*pgd));
661 pgd_set(pgd, (pmd_t *) BAD_PAGETABLE);
662 return NULL;
663 }
664 return (pmd_t *) pgd_page(*pgd) + address;
665 }
666
667 static void srmmu_pgd_free(pgd_t *pgd)
668 {
669 struct page *page = mem_map + MAP_NR(pgd);
670
671 spin_lock(&pgd_spinlock);
672 if (!page->pprev_hash) {
673 (unsigned long *)page->next_hash = pgd_quicklist;
674 pgd_quicklist = (unsigned long *)page;
675 }
676 (unsigned int)page->pprev_hash |= (1 << ((((unsigned long)pgd) >> 10) & 3));
677 pgd_cache_size++;
678 spin_unlock(&pgd_spinlock);
679 }
680
681 static pgd_t *srmmu_pgd_alloc(void)
682 {
683 pgd_t *ret;
684
685 ret = srmmu_get_pgd_fast();
686 if (ret) return ret;
687 return srmmu_get_pgd_slow();
688 }
689
690
691 static void srmmu_set_pgdir(unsigned long address, pgd_t entry)
692 {
693 struct task_struct * p;
694 struct page *page;
695
696 read_lock(&tasklist_lock);
697 for_each_task(p) {
698 if (!p->mm)
699 continue;
700 *pgd_offset(p->mm,address) = entry;
701 }
702 read_unlock(&tasklist_lock);
703 spin_lock(&pgd_spinlock);
704 address >>= SRMMU_PGDIR_SHIFT;
705 for (page = (struct page *)pgd_quicklist; page; page = page->next_hash) {
706 pgd_t *pgd = (pgd_t *)page_address(page);
707 unsigned int mask = (unsigned int)page->pprev_hash;
708
709 if (mask & 1)
710 pgd[address + 0 * SRMMU_PTRS_PER_PGD] = entry;
711 if (mask & 2)
712 pgd[address + 1 * SRMMU_PTRS_PER_PGD] = entry;
713 if (mask & 4)
714 pgd[address + 2 * SRMMU_PTRS_PER_PGD] = entry;
715 if (mask & 8)
716 pgd[address + 3 * SRMMU_PTRS_PER_PGD] = entry;
717 if (mask)
718 flush_chunk((unsigned long)pgd);
719 }
720 spin_unlock(&pgd_spinlock);
721 }
722
723 static void srmmu_set_pte_cacheable(pte_t *ptep, pte_t pteval)
724 {
725 srmmu_set_entry(ptep, pte_val(pteval));
726 }
727
728 static void srmmu_set_pte_nocache_cypress(pte_t *ptep, pte_t pteval)
729 {
730 register unsigned long a, b, c, d, e, f, g;
731 unsigned long line, page;
732
733 srmmu_set_entry(ptep, pte_val(pteval));
734 page = ((unsigned long)ptep) & PAGE_MASK;
735 line = (page + PAGE_SIZE) - 0x100;
736 a = 0x20; b = 0x40; c = 0x60; d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
737 goto inside;
738 do {
739 line -= 0x100;
740 inside:
741 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
742 "sta %%g0, [%0 + %2] %1\n\t"
743 "sta %%g0, [%0 + %3] %1\n\t"
744 "sta %%g0, [%0 + %4] %1\n\t"
745 "sta %%g0, [%0 + %5] %1\n\t"
746 "sta %%g0, [%0 + %6] %1\n\t"
747 "sta %%g0, [%0 + %7] %1\n\t"
748 "sta %%g0, [%0 + %8] %1\n\t" : :
749 "r" (line),
750 "i" (ASI_M_FLUSH_PAGE),
751 "r" (a), "r" (b), "r" (c), "r" (d),
752 "r" (e), "r" (f), "r" (g));
753 } while(line != page);
754 }
755
756 static void srmmu_set_pte_nocache_viking(pte_t *ptep, pte_t pteval)
757 {
758 unsigned long vaddr;
759 int set;
760 int i;
761
762 set = ((unsigned long)ptep >> 5) & 0x7f;
763 vaddr = (KERNBASE + PAGE_SIZE) | (set << 5);
764 srmmu_set_entry(ptep, pte_val(pteval));
765 for (i = 0; i < 8; i++) {
766 __asm__ __volatile__ ("ld [%0], %%g0" : : "r" (vaddr));
767 vaddr += PAGE_SIZE;
768 }
769 }
770
771 static void srmmu_quick_kernel_fault(unsigned long address)
772 {
773 #ifdef __SMP__
774 printk("CPU[%d]: Kernel faults at addr=0x%08lx\n",
775 smp_processor_id(), address);
776 while (1) ;
777 #else
778 printk("Kernel faults at addr=0x%08lx\n", address);
779 printk("PTE=%08lx\n", srmmu_hwprobe((address & PAGE_MASK)));
780 die_if_kernel("SRMMU bolixed...", current->tss.kregs);
781 #endif
782 }
783
784 static inline void alloc_context(struct mm_struct *mm)
785 {
786 struct ctx_list *ctxp;
787
788 ctxp = ctx_free.next;
789 if(ctxp != &ctx_free) {
790 remove_from_ctx_list(ctxp);
791 add_to_used_ctxlist(ctxp);
792 mm->context = ctxp->ctx_number;
793 ctxp->ctx_mm = mm;
794 return;
795 }
796 ctxp = ctx_used.next;
797 if(ctxp->ctx_mm == current->mm)
798 ctxp = ctxp->next;
799 if(ctxp == &ctx_used)
800 panic("out of mmu contexts");
801 flush_cache_mm(ctxp->ctx_mm);
802 flush_tlb_mm(ctxp->ctx_mm);
803 remove_from_ctx_list(ctxp);
804 add_to_used_ctxlist(ctxp);
805 ctxp->ctx_mm->context = NO_CONTEXT;
806 ctxp->ctx_mm = mm;
807 mm->context = ctxp->ctx_number;
808 }
809
810 static inline void free_context(int context)
811 {
812 struct ctx_list *ctx_old;
813
814 ctx_old = ctx_list_pool + context;
815 remove_from_ctx_list(ctx_old);
816 add_to_free_ctxlist(ctx_old);
817 }
818
819
820 static void srmmu_switch_to_context(struct task_struct *tsk)
821 {
822 if(tsk->mm->context == NO_CONTEXT) {
823 spin_lock(&srmmu_context_spinlock);
824 alloc_context(tsk->mm);
825 spin_unlock(&srmmu_context_spinlock);
826 ctxd_set(&srmmu_context_table[tsk->mm->context], tsk->mm->pgd);
827 }
828 srmmu_set_context(tsk->mm->context);
829 }
830
831 static void srmmu_init_new_context(struct mm_struct *mm)
832 {
833 spin_lock(&srmmu_context_spinlock);
834 alloc_context(mm);
835 spin_unlock(&srmmu_context_spinlock);
836
837 flush_cache_mm(mm);
838 ctxd_set(&srmmu_context_table[mm->context], mm->pgd);
839 flush_tlb_mm(mm);
840
841 if(mm == current->mm)
842 srmmu_set_context(mm->context);
843 }
844
845 /* Low level IO area allocation on the SRMMU. */
846 void srmmu_mapioaddr(unsigned long physaddr, unsigned long virt_addr, int bus_type, int rdonly)
847 {
848 pgd_t *pgdp;
849 pmd_t *pmdp;
850 pte_t *ptep;
851 unsigned long tmp;
852
853 physaddr &= PAGE_MASK;
854 pgdp = srmmu_pgd_offset(&init_mm, virt_addr);
855 pmdp = pmd_offset(pgdp, virt_addr);
856 ptep = pte_offset(pmdp, virt_addr);
857 tmp = (physaddr >> 4) | SRMMU_ET_PTE;
858
859 /* I need to test whether this is consistent over all
860 * sun4m's. The bus_type represents the upper 4 bits of
861 * 36-bit physical address on the I/O space lines...
862 */
863 tmp |= (bus_type << 28);
864 if(rdonly)
865 tmp |= SRMMU_PRIV_RDONLY;
866 else
867 tmp |= SRMMU_PRIV;
868 flush_page_to_ram(virt_addr);
869 set_pte(ptep, __pte(tmp));
870 flush_tlb_all();
871 }
872
873 void srmmu_unmapioaddr(unsigned long virt_addr)
874 {
875 pgd_t *pgdp;
876 pmd_t *pmdp;
877 pte_t *ptep;
878
879 pgdp = srmmu_pgd_offset(&init_mm, virt_addr);
880 pmdp = pmd_offset(pgdp, virt_addr);
881 ptep = pte_offset(pmdp, virt_addr);
882
883 /* No need to flush uncacheable page. */
884 set_pte(ptep, mk_pte((unsigned long) EMPTY_PGE, PAGE_SHARED));
885 flush_tlb_all();
886 }
887
888 /* This is used in many routines below. */
889 #define UWINMASK_OFFSET (const unsigned long)(&(((struct task_struct *)0)->tss.uwinmask))
890
891 /* On the SRMMU we do not have the problems with limited tlb entries
892 * for mapping kernel pages, so we just take things from the free page
893 * pool. As a side effect we are putting a little too much pressure
894 * on the gfp() subsystem. This setup also makes the logic of the
895 * iommu mapping code a lot easier as we can transparently handle
896 * mappings on the kernel stack without any special code as we did
897 * need on the sun4c.
898 */
899 struct task_struct *srmmu_alloc_task_struct(void)
900 {
901 return (struct task_struct *) __get_free_pages(GFP_KERNEL, 1);
902 }
903
904 static void srmmu_free_task_struct(struct task_struct *tsk)
905 {
906 free_pages((unsigned long)tsk, 1);
907 }
908
909 /* tsunami.S */
910 extern void tsunami_flush_cache_all(void);
911 extern void tsunami_flush_cache_mm(struct mm_struct *mm);
912 extern void tsunami_flush_cache_range(struct mm_struct *mm, unsigned long start, unsigned long end);
913 extern void tsunami_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
914 extern void tsunami_flush_page_to_ram(unsigned long page);
915 extern void tsunami_flush_page_for_dma(unsigned long page);
916 extern void tsunami_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
917 extern void tsunami_flush_chunk(unsigned long chunk);
918 extern void tsunami_flush_tlb_all(void);
919 extern void tsunami_flush_tlb_mm(struct mm_struct *mm);
920 extern void tsunami_flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end);
921 extern void tsunami_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
922
923 /* Workaround, until we find what's going on with Swift. When low on memory, it sometimes
924 * loops in fault/handle_mm_fault incl. flush_tlb_page to find out it is already in page tables/
925 * fault again on the same instruction. I really don't understand it, have checked it and contexts
926 * are right, flush_tlb_all is done as well, and it faults again... Strange. -jj
927 */
928 static void swift_update_mmu_cache(struct vm_area_struct * vma, unsigned long address, pte_t pte)
929 {
930 static unsigned long last;
931
932 if (last == address) viking_hwprobe(address);
933 last = address;
934 }
935
936 /* Swift flushes. It has the recommended SRMMU specification flushing
937 * facilities, so we can do things in a more fine grained fashion than we
938 * could on the tsunami. Let's watch out for HARDWARE BUGS...
939 */
940
941 static void swift_flush_cache_all(void)
942 {
943 flush_user_windows();
944 swift_idflash_clear();
945 }
946
947 static void swift_flush_cache_mm(struct mm_struct *mm)
948 {
949 FLUSH_BEGIN(mm)
950 flush_user_windows();
951 swift_idflash_clear();
952 FLUSH_END
953 }
954
955 static void swift_flush_cache_range(struct mm_struct *mm, unsigned long start, unsigned long end)
956 {
957 FLUSH_BEGIN(mm)
958 flush_user_windows();
959 swift_idflash_clear();
960 FLUSH_END
961 }
962
963 static void swift_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
964 {
965 FLUSH_BEGIN(vma->vm_mm)
966 flush_user_windows();
967 if(vma->vm_flags & VM_EXEC)
968 swift_flush_icache();
969 swift_flush_dcache();
970 FLUSH_END
971 }
972
973 /* Not copy-back on swift. */
974 static void swift_flush_page_to_ram(unsigned long page)
975 {
976 }
977
978 /* But not IO coherent either. */
979 static void swift_flush_page_for_dma(unsigned long page)
980 {
981 swift_flush_dcache();
982 }
983
984 /* Again, Swift is non-snooping split I/D cache'd just like tsunami,
985 * so have to punt the icache for on-stack signal insns. Only the
986 * icache need be flushed since the dcache is write-through.
987 */
988 static void swift_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
989 {
990 swift_flush_icache();
991 }
992
993 static void swift_flush_chunk(unsigned long chunk)
994 {
995 }
996
997 static void swift_flush_tlb_all(void)
998 {
999 srmmu_flush_whole_tlb();
1000 module_stats.invall++;
1001 }
1002
1003 static void swift_flush_tlb_mm(struct mm_struct *mm)
1004 {
1005 FLUSH_BEGIN(mm)
1006 srmmu_flush_whole_tlb();
1007 module_stats.invmm++;
1008 FLUSH_END
1009 }
1010
1011 static void swift_flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end)
1012 {
1013 FLUSH_BEGIN(mm)
1014 srmmu_flush_whole_tlb();
1015 module_stats.invrnge++;
1016 FLUSH_END
1017 }
1018
1019 static void swift_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
1020 {
1021 FLUSH_BEGIN(vma->vm_mm)
1022 srmmu_flush_whole_tlb();
1023 module_stats.invpg++;
1024 FLUSH_END
1025 }
1026
1027 /* The following are all MBUS based SRMMU modules, and therefore could
1028 * be found in a multiprocessor configuration. On the whole, these
1029 * chips seems to be much more touchy about DVMA and page tables
1030 * with respect to cache coherency.
1031 */
1032
1033 /* Cypress flushes. */
1034 static void cypress_flush_cache_all(void)
1035 {
1036 volatile unsigned long cypress_sucks;
1037 unsigned long faddr, tagval;
1038
1039 flush_user_windows();
1040 for(faddr = 0; faddr < 0x10000; faddr += 0x20) {
1041 __asm__ __volatile__("lda [%1 + %2] %3, %0\n\t" :
1042 "=r" (tagval) :
1043 "r" (faddr), "r" (0x40000),
1044 "i" (ASI_M_DATAC_TAG));
1045
1046 /* If modified and valid, kick it. */
1047 if((tagval & 0x60) == 0x60)
1048 cypress_sucks = *(unsigned long *)(0xf0020000 + faddr);
1049 }
1050 }
1051
1052 static void cypress_flush_cache_mm(struct mm_struct *mm)
1053 {
1054 register unsigned long a, b, c, d, e, f, g;
1055 unsigned long flags, faddr;
1056 int octx;
1057
1058 FLUSH_BEGIN(mm)
1059 flush_user_windows();
1060 __save_and_cli(flags);
1061 octx = srmmu_get_context();
1062 srmmu_set_context(mm->context);
1063 a = 0x20; b = 0x40; c = 0x60;
1064 d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
1065
1066 faddr = (0x10000 - 0x100);
1067 goto inside;
1068 do {
1069 faddr -= 0x100;
1070 inside:
1071 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
1072 "sta %%g0, [%0 + %2] %1\n\t"
1073 "sta %%g0, [%0 + %3] %1\n\t"
1074 "sta %%g0, [%0 + %4] %1\n\t"
1075 "sta %%g0, [%0 + %5] %1\n\t"
1076 "sta %%g0, [%0 + %6] %1\n\t"
1077 "sta %%g0, [%0 + %7] %1\n\t"
1078 "sta %%g0, [%0 + %8] %1\n\t" : :
1079 "r" (faddr), "i" (ASI_M_FLUSH_CTX),
1080 "r" (a), "r" (b), "r" (c), "r" (d),
1081 "r" (e), "r" (f), "r" (g));
1082 } while(faddr);
1083 srmmu_set_context(octx);
1084 __restore_flags(flags);
1085 FLUSH_END
1086 }
1087
1088 static void cypress_flush_cache_range(struct mm_struct *mm, unsigned long start, unsigned long end)
1089 {
1090 register unsigned long a, b, c, d, e, f, g;
1091 unsigned long flags, faddr;
1092 int octx;
1093
1094 FLUSH_BEGIN(mm)
1095 flush_user_windows();
1096 __save_and_cli(flags);
1097 octx = srmmu_get_context();
1098 srmmu_set_context(mm->context);
1099 a = 0x20; b = 0x40; c = 0x60;
1100 d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
1101
1102 start &= SRMMU_PMD_MASK;
1103 while(start < end) {
1104 faddr = (start + (0x10000 - 0x100));
1105 goto inside;
1106 do {
1107 faddr -= 0x100;
1108 inside:
1109 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
1110 "sta %%g0, [%0 + %2] %1\n\t"
1111 "sta %%g0, [%0 + %3] %1\n\t"
1112 "sta %%g0, [%0 + %4] %1\n\t"
1113 "sta %%g0, [%0 + %5] %1\n\t"
1114 "sta %%g0, [%0 + %6] %1\n\t"
1115 "sta %%g0, [%0 + %7] %1\n\t"
1116 "sta %%g0, [%0 + %8] %1\n\t" : :
1117 "r" (faddr),
1118 "i" (ASI_M_FLUSH_SEG),
1119 "r" (a), "r" (b), "r" (c), "r" (d),
1120 "r" (e), "r" (f), "r" (g));
1121 } while (faddr != start);
1122 start += SRMMU_PMD_SIZE;
1123 }
1124 srmmu_set_context(octx);
1125 __restore_flags(flags);
1126 FLUSH_END
1127 }
1128
1129 static void cypress_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
1130 {
1131 register unsigned long a, b, c, d, e, f, g;
1132 struct mm_struct *mm = vma->vm_mm;
1133 unsigned long flags, line;
1134 int octx;
1135
1136 FLUSH_BEGIN(mm)
1137 flush_user_windows();
1138 __save_and_cli(flags);
1139 octx = srmmu_get_context();
1140 srmmu_set_context(mm->context);
1141 a = 0x20; b = 0x40; c = 0x60;
1142 d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
1143
1144 page &= PAGE_MASK;
1145 line = (page + PAGE_SIZE) - 0x100;
1146 goto inside;
1147 do {
1148 line -= 0x100;
1149 inside:
1150 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
1151 "sta %%g0, [%0 + %2] %1\n\t"
1152 "sta %%g0, [%0 + %3] %1\n\t"
1153 "sta %%g0, [%0 + %4] %1\n\t"
1154 "sta %%g0, [%0 + %5] %1\n\t"
1155 "sta %%g0, [%0 + %6] %1\n\t"
1156 "sta %%g0, [%0 + %7] %1\n\t"
1157 "sta %%g0, [%0 + %8] %1\n\t" : :
1158 "r" (line),
1159 "i" (ASI_M_FLUSH_PAGE),
1160 "r" (a), "r" (b), "r" (c), "r" (d),
1161 "r" (e), "r" (f), "r" (g));
1162 } while(line != page);
1163 srmmu_set_context(octx);
1164 __restore_flags(flags);
1165 FLUSH_END
1166 }
1167
1168 /* Cypress is copy-back, at least that is how we configure it. */
1169 static void cypress_flush_page_to_ram(unsigned long page)
1170 {
1171 register unsigned long a, b, c, d, e, f, g;
1172 unsigned long line;
1173
1174 a = 0x20; b = 0x40; c = 0x60; d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
1175 page &= PAGE_MASK;
1176 line = (page + PAGE_SIZE) - 0x100;
1177 goto inside;
1178 do {
1179 line -= 0x100;
1180 inside:
1181 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
1182 "sta %%g0, [%0 + %2] %1\n\t"
1183 "sta %%g0, [%0 + %3] %1\n\t"
1184 "sta %%g0, [%0 + %4] %1\n\t"
1185 "sta %%g0, [%0 + %5] %1\n\t"
1186 "sta %%g0, [%0 + %6] %1\n\t"
1187 "sta %%g0, [%0 + %7] %1\n\t"
1188 "sta %%g0, [%0 + %8] %1\n\t" : :
1189 "r" (line),
1190 "i" (ASI_M_FLUSH_PAGE),
1191 "r" (a), "r" (b), "r" (c), "r" (d),
1192 "r" (e), "r" (f), "r" (g));
1193 } while(line != page);
1194 }
1195
1196 static void cypress_flush_chunk(unsigned long chunk)
1197 {
1198 cypress_flush_page_to_ram(chunk);
1199 }
1200
1201 /* Cypress is also IO cache coherent. */
1202 static void cypress_flush_page_for_dma(unsigned long page)
1203 {
1204 }
1205
1206 /* Cypress has unified L2 VIPT, from which both instructions and data
1207 * are stored. It does not have an onboard icache of any sort, therefore
1208 * no flush is necessary.
1209 */
1210 static void cypress_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
1211 {
1212 }
1213
1214 static void cypress_flush_tlb_all(void)
1215 {
1216 srmmu_flush_whole_tlb();
1217 module_stats.invall++;
1218 }
1219
1220 static void cypress_flush_tlb_mm(struct mm_struct *mm)
1221 {
1222 FLUSH_BEGIN(mm)
1223 __asm__ __volatile__("
1224 lda [%0] %3, %%g5
1225 sta %2, [%0] %3
1226 sta %%g0, [%1] %4
1227 sta %%g5, [%0] %3"
1228 : /* no outputs */
1229 : "r" (SRMMU_CTX_REG), "r" (0x300), "r" (mm->context),
1230 "i" (ASI_M_MMUREGS), "i" (ASI_M_FLUSH_PROBE)
1231 : "g5");
1232 module_stats.invmm++;
1233 FLUSH_END
1234 }
1235
1236 static void cypress_flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end)
1237 {
1238 unsigned long size;
1239
1240 FLUSH_BEGIN(mm)
1241 start &= SRMMU_PGDIR_MASK;
1242 size = SRMMU_PGDIR_ALIGN(end) - start;
1243 __asm__ __volatile__("
1244 lda [%0] %5, %%g5
1245 sta %1, [%0] %5
1246 1: subcc %3, %4, %3
1247 bne 1b
1248 sta %%g0, [%2 + %3] %6
1249 sta %%g5, [%0] %5"
1250 : /* no outputs */
1251 : "r" (SRMMU_CTX_REG), "r" (mm->context), "r" (start | 0x200),
1252 "r" (size), "r" (SRMMU_PGDIR_SIZE), "i" (ASI_M_MMUREGS),
1253 "i" (ASI_M_FLUSH_PROBE)
1254 : "g5", "cc");
1255 module_stats.invrnge++;
1256 FLUSH_END
1257 }
1258
1259 static void cypress_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
1260 {
1261 struct mm_struct *mm = vma->vm_mm;
1262
1263 FLUSH_BEGIN(mm)
1264 __asm__ __volatile__("
1265 lda [%0] %3, %%g5
1266 sta %1, [%0] %3
1267 sta %%g0, [%2] %4
1268 sta %%g5, [%0] %3"
1269 : /* no outputs */
1270 : "r" (SRMMU_CTX_REG), "r" (mm->context), "r" (page & PAGE_MASK),
1271 "i" (ASI_M_MMUREGS), "i" (ASI_M_FLUSH_PROBE)
1272 : "g5");
1273 module_stats.invpg++;
1274 FLUSH_END
1275 }
1276
1277 /* viking.S */
1278 extern void viking_flush_cache_all(void);
1279 extern void viking_flush_cache_mm(struct mm_struct *mm);
1280 extern void viking_flush_cache_range(struct mm_struct *mm, unsigned long start,
1281 unsigned long end);
1282 extern void viking_flush_cache_page(struct vm_area_struct *vma,
1283 unsigned long page);
1284 extern void viking_flush_page_to_ram(unsigned long page);
1285 extern void viking_flush_page_for_dma(unsigned long page);
1286 extern void viking_flush_sig_insns(struct mm_struct *mm, unsigned long addr);
1287 extern void viking_flush_page(unsigned long page);
1288 extern void viking_mxcc_flush_page(unsigned long page);
1289 extern void viking_flush_chunk(unsigned long chunk);
1290 extern void viking_c_flush_chunk(unsigned long chunk);
1291 extern void viking_s_flush_chunk(unsigned long chunk);
1292 extern void viking_mxcc_flush_chunk(unsigned long chunk);
1293 extern void viking_flush_tlb_all(void);
1294 extern void viking_flush_tlb_mm(struct mm_struct *mm);
1295 extern void viking_flush_tlb_range(struct mm_struct *mm, unsigned long start,
1296 unsigned long end);
1297 extern void viking_flush_tlb_page(struct vm_area_struct *vma,
1298 unsigned long page);
1299 extern void sun4dsmp_flush_tlb_all(void);
1300 extern void sun4dsmp_flush_tlb_mm(struct mm_struct *mm);
1301 extern void sun4dsmp_flush_tlb_range(struct mm_struct *mm, unsigned long start,
1302 unsigned long end);
1303 extern void sun4dsmp_flush_tlb_page(struct vm_area_struct *vma,
1304 unsigned long page);
1305
1306 /* hypersparc.S */
1307 extern void hypersparc_flush_cache_all(void);
1308 extern void hypersparc_flush_cache_mm(struct mm_struct *mm);
1309 extern void hypersparc_flush_cache_range(struct mm_struct *mm, unsigned long start, unsigned long end);
1310 extern void hypersparc_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
1311 extern void hypersparc_flush_page_to_ram(unsigned long page);
1312 extern void hypersparc_flush_chunk(unsigned long chunk);
1313 extern void hypersparc_flush_page_for_dma(unsigned long page);
1314 extern void hypersparc_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
1315 extern void hypersparc_flush_tlb_all(void);
1316 extern void hypersparc_flush_tlb_mm(struct mm_struct *mm);
1317 extern void hypersparc_flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end);
1318 extern void hypersparc_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
1319 extern void hypersparc_setup_blockops(void);
1320
1321 static void srmmu_set_pte_nocache_hyper(pte_t *ptep, pte_t pteval)
1322 {
1323 unsigned long page = ((unsigned long)ptep) & PAGE_MASK;
1324
1325 srmmu_set_entry(ptep, pte_val(pteval));
1326 hypersparc_flush_page_to_ram(page);
1327 }
1328
1329 static void hypersparc_ctxd_set(ctxd_t *ctxp, pgd_t *pgdp)
1330 {
1331 srmmu_set_entry((pte_t *)ctxp, __pte((SRMMU_ET_PTD | (srmmu_v2p((unsigned long) pgdp) >> 4))));
1332 hypersparc_flush_page_to_ram((unsigned long)ctxp);
1333 hyper_flush_whole_icache();
1334 }
1335
1336 static void hypersparc_update_rootmmu_dir(struct task_struct *tsk, pgd_t *pgdp)
1337 {
1338 unsigned long page = ((unsigned long) pgdp) & PAGE_MASK;
1339
1340 if(pgdp != swapper_pg_dir)
1341 hypersparc_flush_page_to_ram(page);
1342
1343 if(tsk->mm->context != NO_CONTEXT &&
1344 tsk->mm->pgd != pgdp) {
1345 flush_cache_mm(tsk->mm);
1346 ctxd_set(&srmmu_context_table[tsk->mm->context], pgdp);
1347 flush_tlb_mm(tsk->mm);
1348 }
1349 }
1350
1351 static void viking_update_rootmmu_dir(struct task_struct *tsk, pgd_t *pgdp)
1352 {
1353 if(pgdp != swapper_pg_dir)
1354 flush_chunk((unsigned long)pgdp);
1355 if(tsk->mm->context != NO_CONTEXT &&
1356 tsk->mm->pgd != pgdp) {
1357 flush_cache_mm(tsk->mm);
1358 ctxd_set(&srmmu_context_table[tsk->mm->context], pgdp);
1359 flush_tlb_mm(tsk->mm);
1360 }
1361 }
1362
1363 static void cypress_update_rootmmu_dir(struct task_struct *tsk, pgd_t *pgdp)
1364 {
1365 register unsigned long a, b, c, d, e, f, g;
1366 unsigned long page = ((unsigned long) pgdp) & PAGE_MASK;
1367 unsigned long line;
1368
1369 if(pgdp == swapper_pg_dir)
1370 goto skip_flush;
1371
1372 a = 0x20; b = 0x40; c = 0x60; d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
1373 page &= PAGE_MASK;
1374 line = (page + PAGE_SIZE) - 0x100;
1375 goto inside;
1376 do {
1377 line -= 0x100;
1378 inside:
1379 __asm__ __volatile__("sta %%g0, [%0] %1\n\t"
1380 "sta %%g0, [%0 + %2] %1\n\t"
1381 "sta %%g0, [%0 + %3] %1\n\t"
1382 "sta %%g0, [%0 + %4] %1\n\t"
1383 "sta %%g0, [%0 + %5] %1\n\t"
1384 "sta %%g0, [%0 + %6] %1\n\t"
1385 "sta %%g0, [%0 + %7] %1\n\t"
1386 "sta %%g0, [%0 + %8] %1\n\t" : :
1387 "r" (line),
1388 "i" (ASI_M_FLUSH_PAGE),
1389 "r" (a), "r" (b), "r" (c), "r" (d),
1390 "r" (e), "r" (f), "r" (g));
1391 } while(line != page);
1392 skip_flush:
1393 if(tsk->mm->context != NO_CONTEXT &&
1394 tsk->mm->pgd != pgdp) {
1395 flush_cache_mm(tsk->mm);
1396 ctxd_set(&srmmu_context_table[tsk->mm->context], pgdp);
1397 flush_tlb_mm(tsk->mm);
1398 }
1399 }
1400
1401 static void hypersparc_switch_to_context(struct task_struct *tsk)
1402 {
1403 if(tsk->mm->context == NO_CONTEXT) {
1404 ctxd_t *ctxp;
1405
1406 spin_lock(&srmmu_context_spinlock);
1407 alloc_context(tsk->mm);
1408 spin_unlock(&srmmu_context_spinlock);
1409 ctxp = &srmmu_context_table[tsk->mm->context];
1410 srmmu_set_entry((pte_t *)ctxp, __pte((SRMMU_ET_PTD | (srmmu_v2p((unsigned long) tsk->mm->pgd) >> 4))));
1411 hypersparc_flush_page_to_ram((unsigned long)ctxp);
1412 }
1413 hyper_flush_whole_icache();
1414 srmmu_set_context(tsk->mm->context);
1415 }
1416
1417 static void hypersparc_init_new_context(struct mm_struct *mm)
1418 {
1419 ctxd_t *ctxp;
1420
1421 spin_lock(&srmmu_context_spinlock);
1422 alloc_context(mm);
1423 spin_unlock(&srmmu_context_spinlock);
1424
1425 ctxp = &srmmu_context_table[mm->context];
1426 srmmu_set_entry((pte_t *)ctxp, __pte((SRMMU_ET_PTD | (srmmu_v2p((unsigned long) mm->pgd) >> 4))));
1427 hypersparc_flush_page_to_ram((unsigned long)ctxp);
1428
1429 if(mm == current->mm) {
1430 hyper_flush_whole_icache();
1431 srmmu_set_context(mm->context);
1432 }
1433 }
1434
1435 static unsigned long mempool;
1436
1437 /* NOTE: All of this startup code assumes the low 16mb (approx.) of
1438 * kernel mappings are done with one single contiguous chunk of
1439 * ram. On small ram machines (classics mainly) we only get
1440 * around 8mb mapped for us.
1441 */
1442
1443 static unsigned long kbpage;
1444
1445 /* Some dirty hacks to abstract away the painful boot up init. */
1446 static inline unsigned long srmmu_early_paddr(unsigned long vaddr)
1447 {
1448 return ((vaddr - KERNBASE) + kbpage);
1449 }
1450
1451 static inline void srmmu_early_pgd_set(pgd_t *pgdp, pmd_t *pmdp)
1452 {
1453 set_pte((pte_t *)pgdp, __pte((SRMMU_ET_PTD | (srmmu_early_paddr((unsigned long) pmdp) >> 4))));
1454 }
1455
1456 static inline void srmmu_early_pmd_set(pmd_t *pmdp, pte_t *ptep)
1457 {
1458 set_pte((pte_t *)pmdp, __pte((SRMMU_ET_PTD | (srmmu_early_paddr((unsigned long) ptep) >> 4))));
1459 }
1460
1461 static inline unsigned long srmmu_early_pgd_page(pgd_t pgd)
1462 {
1463 return (((pgd_val(pgd) & SRMMU_PTD_PMASK) << 4) - kbpage) + KERNBASE;
1464 }
1465
1466 static inline unsigned long srmmu_early_pmd_page(pmd_t pmd)
1467 {
1468 return (((pmd_val(pmd) & SRMMU_PTD_PMASK) << 4) - kbpage) + KERNBASE;
1469 }
1470
1471 static inline pmd_t *srmmu_early_pmd_offset(pgd_t *dir, unsigned long address)
1472 {
1473 return (pmd_t *) srmmu_early_pgd_page(*dir) + ((address >> SRMMU_PMD_SHIFT) & (SRMMU_PTRS_PER_PMD - 1));
1474 }
1475
1476 static inline pte_t *srmmu_early_pte_offset(pmd_t *dir, unsigned long address)
1477 {
1478 return (pte_t *) srmmu_early_pmd_page(*dir) + ((address >> PAGE_SHIFT) & (SRMMU_PTRS_PER_PTE - 1));
1479 }
1480
1481 static inline void srmmu_allocate_ptable_skeleton(unsigned long start, unsigned long end)
1482 {
1483 pgd_t *pgdp;
1484 pmd_t *pmdp;
1485 pte_t *ptep;
1486
1487 while(start < end) {
1488 pgdp = srmmu_pgd_offset(&init_mm, start);
1489 if(srmmu_pgd_none(*pgdp)) {
1490 pmdp = sparc_init_alloc(&mempool, SRMMU_PMD_TABLE_SIZE);
1491 srmmu_early_pgd_set(pgdp, pmdp);
1492 }
1493 pmdp = srmmu_early_pmd_offset(pgdp, start);
1494 if(srmmu_pmd_none(*pmdp)) {
1495 ptep = sparc_init_alloc(&mempool, SRMMU_PTE_TABLE_SIZE);
1496 srmmu_early_pmd_set(pmdp, ptep);
1497 }
1498 start = (start + SRMMU_PMD_SIZE) & SRMMU_PMD_MASK;
1499 }
1500 }
1501
1502 /* This is much cleaner than poking around physical address space
1503 * looking at the prom's page table directly which is what most
1504 * other OS's do. Yuck... this is much better.
1505 */
1506 void __init srmmu_inherit_prom_mappings(unsigned long start,unsigned long end)
1507 {
1508 pgd_t *pgdp;
1509 pmd_t *pmdp;
1510 pte_t *ptep;
1511 int what = 0; /* 0 = normal-pte, 1 = pmd-level pte, 2 = pgd-level pte */
1512 unsigned long prompte;
1513
1514 while(start <= end) {
1515 if (start == 0)
1516 break; /* probably wrap around */
1517 if(start == 0xfef00000)
1518 start = KADB_DEBUGGER_BEGVM;
1519 if(!(prompte = srmmu_hwprobe(start))) {
1520 start += PAGE_SIZE;
1521 continue;
1522 }
1523
1524 /* A red snapper, see what it really is. */
1525 what = 0;
1526
1527 if(!(start & ~(SRMMU_PMD_MASK))) {
1528 if(srmmu_hwprobe((start-PAGE_SIZE) + SRMMU_PMD_SIZE) == prompte)
1529 what = 1;
1530 }
1531
1532 if(!(start & ~(SRMMU_PGDIR_MASK))) {
1533 if(srmmu_hwprobe((start-PAGE_SIZE) + SRMMU_PGDIR_SIZE) ==
1534 prompte)
1535 what = 2;
1536 }
1537
1538 pgdp = srmmu_pgd_offset(&init_mm, start);
1539 if(what == 2) {
1540 *pgdp = __pgd(prompte);
1541 start += SRMMU_PGDIR_SIZE;
1542 continue;
1543 }
1544 if(srmmu_pgd_none(*pgdp)) {
1545 pmdp = sparc_init_alloc(&mempool, SRMMU_PMD_TABLE_SIZE);
1546 srmmu_early_pgd_set(pgdp, pmdp);
1547 }
1548 pmdp = srmmu_early_pmd_offset(pgdp, start);
1549 if(what == 1) {
1550 *pmdp = __pmd(prompte);
1551 start += SRMMU_PMD_SIZE;
1552 continue;
1553 }
1554 if(srmmu_pmd_none(*pmdp)) {
1555 ptep = sparc_init_alloc(&mempool, SRMMU_PTE_TABLE_SIZE);
1556 srmmu_early_pmd_set(pmdp, ptep);
1557 }
1558 ptep = srmmu_early_pte_offset(pmdp, start);
1559 *ptep = __pte(prompte);
1560 start += PAGE_SIZE;
1561 }
1562 }
1563
1564 #ifdef DEBUG_MAP_KERNEL
1565 #define MKTRACE(foo) prom_printf foo
1566 #else
1567 #define MKTRACE(foo)
1568 #endif
1569
1570 static int lots_of_ram __initdata = 0;
1571 static int srmmu_low_pa __initdata = 0;
1572 static unsigned long end_of_phys_memory __initdata = 0;
1573
1574 void __init srmmu_end_memory(unsigned long memory_size, unsigned long *end_mem_p)
1575 {
1576 unsigned int sum = 0;
1577 unsigned long last = 0xff000000;
1578 long first, cur;
1579 unsigned long pa;
1580 unsigned long total = 0;
1581 int i;
1582
1583 pa = srmmu_hwprobe(KERNBASE + PAGE_SIZE);
1584 pa = (pa & SRMMU_PTE_PMASK) << 4;
1585 if (!sp_banks[0].base_addr && pa == PAGE_SIZE) {
1586 for(i = 0; sp_banks[i].num_bytes != 0; i++) {
1587 if (sp_banks[i].base_addr + sp_banks[i].num_bytes > 0x0d000000)
1588 break;
1589 }
1590 if (!sp_banks[i].num_bytes) {
1591 srmmu_low_pa = 1;
1592 end_of_phys_memory = SRMMU_PGDIR_ALIGN(sp_banks[i-1].base_addr + sp_banks[i-1].num_bytes);
1593 *end_mem_p = KERNBASE + end_of_phys_memory;
1594 if (sp_banks[0].num_bytes >= (6 * 1024 * 1024) || end_of_phys_memory <= 0x06000000) {
1595 /* Make sure there will be enough memory for the whole mem_map (even if sparse) */
1596 return;
1597 }
1598 }
1599 }
1600 for(i = 0; sp_banks[i].num_bytes != 0; i++) {
1601 pa = sp_banks[i].base_addr;
1602 first = (pa & (~SRMMU_PGDIR_MASK));
1603 cur = (sp_banks[i].num_bytes + first - SRMMU_PGDIR_SIZE);
1604 if (cur < 0) cur = 0;
1605 if (!first || last != (pa & SRMMU_PGDIR_MASK))
1606 total += SRMMU_PGDIR_SIZE;
1607 sum += sp_banks[i].num_bytes;
1608 if (memory_size) {
1609 if (sum > memory_size) {
1610 sp_banks[i].num_bytes -=
1611 (sum - memory_size);
1612 cur = (sp_banks[i].num_bytes + first - SRMMU_PGDIR_SIZE);
1613 if (cur < 0) cur = 0;
1614 total += SRMMU_PGDIR_ALIGN(cur);
1615 sum = memory_size;
1616 sp_banks[++i].base_addr = 0xdeadbeef;
1617 sp_banks[i].num_bytes = 0;
1618 break;
1619 }
1620 }
1621 total += SRMMU_PGDIR_ALIGN(cur);
1622 last = (sp_banks[i].base_addr + sp_banks[i].num_bytes - 1) & SRMMU_PGDIR_MASK;
1623 }
1624 if (total <= 0x0d000000)
1625 *end_mem_p = KERNBASE + total;
1626 else {
1627 *end_mem_p = 0xfd000000;
1628 lots_of_ram = 1;
1629 }
1630 end_of_phys_memory = total;
1631 }
1632
1633 #define KERNEL_PTE(page_shifted) ((page_shifted)|SRMMU_CACHE|SRMMU_PRIV|SRMMU_VALID)
1634
1635 /* Create a third-level SRMMU 16MB page mapping. */
1636 static void __init do_large_mapping(unsigned long vaddr, unsigned long phys_base)
1637 {
1638 pgd_t *pgdp = srmmu_pgd_offset(&init_mm, vaddr);
1639 unsigned long big_pte;
1640
1641 MKTRACE(("dlm[v<%08lx>-->p<%08lx>]", vaddr, phys_base));
1642 big_pte = KERNEL_PTE(phys_base >> 4);
1643 *pgdp = __pgd(big_pte);
1644 }
1645
1646 /* Look in the sp_bank for the given physical page, return the
1647 * index number the entry was found in, or -1 for not found.
1648 */
1649 static inline int find_in_spbanks(unsigned long phys_page)
1650 {
1651 int entry;
1652
1653 for(entry = 0; sp_banks[entry].num_bytes; entry++) {
1654 unsigned long start = sp_banks[entry].base_addr;
1655 unsigned long end = start + sp_banks[entry].num_bytes;
1656
1657 if((start <= phys_page) && (phys_page < end))
1658 return entry;
1659 }
1660 return -1;
1661 }
1662
1663 /* Find an spbank entry not mapped as of yet, TAKEN_VECTOR is an
1664 * array of char's, each member indicating if that spbank is mapped
1665 * yet or not.
1666 */
1667 static int __init find_free_spbank(char *taken_vector)
1668 {
1669 int entry;
1670
1671 for(entry = 0; sp_banks[entry].num_bytes; entry++)
1672 if(!taken_vector[entry])
1673 break;
1674 return entry;
1675 }
1676
1677 static unsigned long map_spbank_last_pa __initdata = 0xff000000;
1678
1679 /* Map sp_bank entry SP_ENTRY, starting at virtual address VBASE.
1680 */
1681 static unsigned long __init map_spbank(unsigned long vbase, int sp_entry)
1682 {
1683 unsigned long pstart = (sp_banks[sp_entry].base_addr & SRMMU_PGDIR_MASK);
1684 unsigned long vstart = (vbase & SRMMU_PGDIR_MASK);
1685 unsigned long vend = SRMMU_PGDIR_ALIGN(vbase + sp_banks[sp_entry].num_bytes);
1686 static int srmmu_bank = 0;
1687
1688 MKTRACE(("map_spbank %d[v<%08lx>p<%08lx>s<%08lx>]", sp_entry, vbase, sp_banks[sp_entry].base_addr, sp_banks[sp_entry].num_bytes));
1689 MKTRACE(("map_spbank2 %d[p%08lx v%08lx-%08lx]", sp_entry, pstart, vstart, vend));
1690 while(vstart < vend) {
1691 do_large_mapping(vstart, pstart);
1692 vstart += SRMMU_PGDIR_SIZE; pstart += SRMMU_PGDIR_SIZE;
1693 }
1694 srmmu_map[srmmu_bank].vbase = vbase;
1695 srmmu_map[srmmu_bank].pbase = sp_banks[sp_entry].base_addr;
1696 srmmu_map[srmmu_bank].size = sp_banks[sp_entry].num_bytes;
1697 srmmu_bank++;
1698 map_spbank_last_pa = pstart - SRMMU_PGDIR_SIZE;
1699 return vstart;
1700 }
1701
1702 static inline void memprobe_error(char *msg)
1703 {
1704 prom_printf(msg);
1705 prom_printf("Halting now...\n");
1706 prom_halt();
1707 }
1708
1709 /* Assumptions: The bank given to the kernel from the prom/bootloader
1710 * is part of a full bank which is at least 4MB in size and begins at
1711 * 0xf0000000 (ie. KERNBASE).
1712 */
1713 static inline void map_kernel(void)
1714 {
1715 unsigned long raw_pte, physpage;
1716 unsigned long vaddr, low_base;
1717 char etaken[SPARC_PHYS_BANKS];
1718 int entry;
1719
1720 /* Step 1: Clear out sp_banks taken map. */
1721 MKTRACE(("map_kernel: clearing etaken vector... "));
1722 for(entry = 0; entry < SPARC_PHYS_BANKS; entry++)
1723 etaken[entry] = 0;
1724
1725 low_base = KERNBASE;
1726
1727 /* Step 2: Fill in KERNBASE base pgd. Lots of sanity checking here. */
1728 raw_pte = srmmu_hwprobe(KERNBASE + PAGE_SIZE);
1729 if((raw_pte & SRMMU_ET_MASK) != SRMMU_ET_PTE)
1730 memprobe_error("Wheee, kernel not mapped at all by boot loader.\n");
1731 physpage = (raw_pte & SRMMU_PTE_PMASK) << 4;
1732 physpage -= PAGE_SIZE;
1733 if(physpage & ~(SRMMU_PGDIR_MASK))
1734 memprobe_error("Wheee, kernel not mapped on 16MB physical boundry.\n");
1735 entry = find_in_spbanks(physpage);
1736 if(entry == -1 || (sp_banks[entry].base_addr != physpage))
1737 memprobe_error("Kernel mapped in non-existant memory.\n");
1738 MKTRACE(("map_kernel: map_spbank(vbase=%08x, entry<%d>)[%08lx,%08lx]\n", KERNBASE, entry, sp_banks[entry].base_addr, sp_banks[entry].num_bytes));
1739 if (sp_banks[entry].num_bytes > 0x0d000000) {
1740 unsigned long orig_base = sp_banks[entry].base_addr;
1741 unsigned long orig_len = sp_banks[entry].num_bytes;
1742 unsigned long can_map = 0x0d000000;
1743
1744 /* Map a partial bank in this case, adjust the base
1745 * and the length, but don't mark it used.
1746 */
1747 sp_banks[entry].num_bytes = can_map;
1748 MKTRACE(("wheee really big mapping [%08lx,%08lx]", orig_base, can_map));
1749 vaddr = map_spbank(KERNBASE, entry);
1750 MKTRACE(("vaddr now %08lx ", vaddr));
1751 sp_banks[entry].base_addr = orig_base + can_map;
1752 sp_banks[entry].num_bytes = orig_len - can_map;
1753 MKTRACE(("adjust[%08lx,%08lx]\n", (orig_base + can_map), (orig_len - can_map)));
1754 MKTRACE(("map_kernel: skipping first loop\n"));
1755 goto loop_skip;
1756 }
1757 vaddr = map_spbank(KERNBASE, entry);
1758 etaken[entry] = 1;
1759
1760 /* Step 3: Map what we can above KERNBASE. */
1761 MKTRACE(("map_kernel: vaddr=%08lx, entering first loop\n", vaddr));
1762 for(;;) {
1763 unsigned long bank_size;
1764
1765 MKTRACE(("map_kernel: ffsp()"));
1766 entry = find_free_spbank(&etaken[0]);
1767 bank_size = sp_banks[entry].num_bytes;
1768 MKTRACE(("<%d> base=%08lx bs=%08lx ", entry, sp_banks[entry].base_addr, bank_size));
1769 if(!bank_size)
1770 break;
1771 if (srmmu_low_pa)
1772 vaddr = KERNBASE + sp_banks[entry].base_addr;
1773 else if (sp_banks[entry].base_addr & (~SRMMU_PGDIR_MASK)) {
1774 if (map_spbank_last_pa == (sp_banks[entry].base_addr & SRMMU_PGDIR_MASK))
1775 vaddr -= SRMMU_PGDIR_SIZE;
1776 vaddr += (sp_banks[entry].base_addr & (~SRMMU_PGDIR_MASK));
1777 }
1778 if ((vaddr + bank_size - KERNBASE) > 0x0d000000) {
1779 unsigned long orig_base = sp_banks[entry].base_addr;
1780 unsigned long orig_len = sp_banks[entry].num_bytes;
1781 unsigned long can_map = (0xfd000000 - vaddr);
1782
1783 /* Map a partial bank in this case, adjust the base
1784 * and the length, but don't mark it used.
1785 */
1786 sp_banks[entry].num_bytes = can_map;
1787 MKTRACE(("wheee really big mapping [%08lx,%08lx]", orig_base, can_map));
1788 vaddr = map_spbank(vaddr, entry);
1789 MKTRACE(("vaddr now %08lx ", vaddr));
1790 sp_banks[entry].base_addr = orig_base + can_map;
1791 sp_banks[entry].num_bytes = orig_len - can_map;
1792 MKTRACE(("adjust[%08lx,%08lx]\n", (orig_base + can_map), (orig_len - can_map)));
1793 break;
1794 }
1795
1796 /* Ok, we can map this one, do it. */
1797 MKTRACE(("map_spbank(%08lx,entry<%d>) ", vaddr, entry));
1798 vaddr = map_spbank(vaddr, entry);
1799 etaken[entry] = 1;
1800 MKTRACE(("vaddr now %08lx\n", vaddr));
1801 }
1802 MKTRACE(("\n"));
1803 /* If not lots_of_ram, assume we did indeed map it all above. */
1804 loop_skip:
1805 if(!lots_of_ram)
1806 goto check_and_return;
1807
1808 /* Step 4: Map the rest (if any) right below KERNBASE. */
1809 MKTRACE(("map_kernel: doing low mappings... "));
1810 low_base = (KERNBASE - end_of_phys_memory + 0x0d000000);
1811 MKTRACE(("end_of_phys_memory=%08lx low_base=%08lx\n", end_of_phys_memory, low_base));
1812
1813 /* Ok, now map 'em. */
1814 MKTRACE(("map_kernel: Allocate pt skeleton (%08lx, %08x)\n",low_base,KERNBASE));
1815 srmmu_allocate_ptable_skeleton(low_base, KERNBASE);
1816 vaddr = low_base;
1817 map_spbank_last_pa = 0xff000000;
1818 MKTRACE(("map_kernel: vaddr=%08lx Entering second loop for low maps.\n", vaddr));
1819 for(;;) {
1820 unsigned long bank_size;
1821
1822 entry = find_free_spbank(&etaken[0]);
1823 bank_size = sp_banks[entry].num_bytes;
1824 MKTRACE(("map_kernel: e<%d> base=%08lx bs=%08lx ", entry, sp_banks[entry].base_addr, bank_size));
1825 if(!bank_size)
1826 break;
1827 if (sp_banks[entry].base_addr & (~SRMMU_PGDIR_MASK)) {
1828 if (map_spbank_last_pa == (sp_banks[entry].base_addr & SRMMU_PGDIR_MASK))
1829 vaddr -= SRMMU_PGDIR_SIZE;
1830 vaddr += (sp_banks[entry].base_addr & (~SRMMU_PGDIR_MASK));
1831 }
1832 if((vaddr + bank_size) > KERNBASE)
1833 memprobe_error("Wheee, kernel low mapping overflow.\n");
1834 MKTRACE(("map_spbank(%08lx, %d) ", vaddr, entry));
1835 vaddr = map_spbank(vaddr, entry);
1836 etaken[entry] = 1;
1837 MKTRACE(("Now, vaddr=%08lx end_of_phys_memory=%08lx\n", vaddr, end_of_phys_memory));
1838 }
1839 MKTRACE(("\n"));
1840
1841 check_and_return:
1842 /* Step 5: Sanity check, make sure we did it all. */
1843 MKTRACE(("check_and_return: "));
1844 for(entry = 0; sp_banks[entry].num_bytes; entry++) {
1845 MKTRACE(("e[%d]=%d ", entry, etaken[entry]));
1846 if(!etaken[entry]) {
1847 MKTRACE(("oops\n"));
1848 memprobe_error("Some bank did not get mapped.\n");
1849 }
1850 }
1851 MKTRACE(("success\n"));
1852 init_mm.mmap->vm_start = page_offset = low_base;
1853 stack_top = page_offset - PAGE_SIZE;
1854 BTFIXUPSET_SETHI(page_offset, low_base);
1855 BTFIXUPSET_SETHI(stack_top, page_offset - PAGE_SIZE);
1856 BTFIXUPSET_SIMM13(user_ptrs_per_pgd, page_offset / SRMMU_PGDIR_SIZE);
1857
1858 #if 1
1859 for(entry = 0; srmmu_map[entry].size; entry++) {
1860 printk("[%d]: v[%08lx,%08lx](%lx) p[%08lx]\n", entry,
1861 srmmu_map[entry].vbase,
1862 srmmu_map[entry].vbase + srmmu_map[entry].size,
1863 srmmu_map[entry].size,
1864 srmmu_map[entry].pbase);
1865 }
1866 #endif
1867
1868 /* Now setup the p2v/v2p hash tables. */
1869 for(entry = 0; entry < SRMMU_HASHSZ; entry++)
1870 srmmu_v2p_hash[entry] = ((0xff - entry) << 24);
1871 for(entry = 0; entry < SRMMU_HASHSZ; entry++)
1872 srmmu_p2v_hash[entry] = 0xffffffffUL;
1873 for(entry = 0; srmmu_map[entry].size; entry++) {
1874 unsigned long addr;
1875
1876 for(addr = srmmu_map[entry].vbase;
1877 addr < (srmmu_map[entry].vbase + srmmu_map[entry].size);
1878 addr += (1 << 24))
1879 srmmu_v2p_hash[srmmu_ahashfn(addr)] =
1880 srmmu_map[entry].pbase - srmmu_map[entry].vbase;
1881 for(addr = srmmu_map[entry].pbase;
1882 addr < (srmmu_map[entry].pbase + srmmu_map[entry].size);
1883 addr += (1 << 24))
1884 srmmu_p2v_hash[srmmu_ahashfn(addr)] =
1885 srmmu_map[entry].pbase - srmmu_map[entry].vbase;
1886 }
1887
1888 BTFIXUPSET_SETHI(page_contig_offset, page_offset - (0xfd000000 - KERNBASE));
1889 if (srmmu_low_pa)
1890 phys_mem_contig = 0;
1891 else {
1892 phys_mem_contig = 1;
1893 for(entry = 0; srmmu_map[entry].size; entry++)
1894 if (srmmu_map[entry].pbase != srmmu_c_v2p (srmmu_map[entry].vbase)) {
1895 phys_mem_contig = 0;
1896 break;
1897 }
1898 }
1899 if (phys_mem_contig) {
1900 printk ("SRMMU: Physical memory is contiguous, bypassing VA<->PA hashes.\n");
1901 BTFIXUPSET_CALL(pte_page, srmmu_c_pte_page, BTFIXUPCALL_NORM);
1902 BTFIXUPSET_CALL(pmd_page, srmmu_c_pmd_page, BTFIXUPCALL_NORM);
1903 BTFIXUPSET_CALL(pgd_page, srmmu_c_pgd_page, BTFIXUPCALL_NORM);
1904 BTFIXUPSET_CALL(mk_pte, srmmu_c_mk_pte, BTFIXUPCALL_NORM);
1905 BTFIXUPSET_CALL(pte_offset, srmmu_c_pte_offset, BTFIXUPCALL_NORM);
1906 BTFIXUPSET_CALL(pmd_offset, srmmu_c_pmd_offset, BTFIXUPCALL_NORM);
1907 if (BTFIXUPVAL_CALL(ctxd_set) == (unsigned long)srmmu_ctxd_set)
1908 BTFIXUPSET_CALL(ctxd_set, srmmu_c_ctxd_set, BTFIXUPCALL_NORM);
1909 BTFIXUPSET_CALL(pgd_set, srmmu_c_pgd_set, BTFIXUPCALL_NORM);
1910 BTFIXUPSET_CALL(pmd_set, srmmu_c_pmd_set, BTFIXUPCALL_NORM);
1911 BTFIXUPSET_CALL(mmu_v2p, srmmu_c_v2p, BTFIXUPCALL_NORM);
1912 BTFIXUPSET_CALL(mmu_p2v, srmmu_c_p2v, BTFIXUPCALL_NORM);
1913 if (BTFIXUPVAL_CALL(flush_chunk) == (unsigned long)viking_flush_chunk)
1914 BTFIXUPSET_CALL(flush_chunk, viking_c_flush_chunk, BTFIXUPCALL_NORM);
1915 } else if (srmmu_low_pa) {
1916 printk ("SRMMU: Compact physical memory. Using strightforward VA<->PA translations.\n");
1917 BTFIXUPSET_CALL(pte_page, srmmu_s_pte_page, BTFIXUPCALL_NORM);
1918 BTFIXUPSET_CALL(pmd_page, srmmu_s_pmd_page, BTFIXUPCALL_NORM);
1919 BTFIXUPSET_CALL(pgd_page, srmmu_s_pgd_page, BTFIXUPCALL_NORM);
1920 BTFIXUPSET_CALL(mk_pte, srmmu_s_mk_pte, BTFIXUPCALL_NORM);
1921 BTFIXUPSET_CALL(pte_offset, srmmu_s_pte_offset, BTFIXUPCALL_NORM);
1922 BTFIXUPSET_CALL(pmd_offset, srmmu_s_pmd_offset, BTFIXUPCALL_NORM);
1923 if (BTFIXUPVAL_CALL(ctxd_set) == (unsigned long)srmmu_ctxd_set)
1924 BTFIXUPSET_CALL(ctxd_set, srmmu_s_ctxd_set, BTFIXUPCALL_NORM);
1925 BTFIXUPSET_CALL(pgd_set, srmmu_s_pgd_set, BTFIXUPCALL_NORM);
1926 BTFIXUPSET_CALL(pmd_set, srmmu_s_pmd_set, BTFIXUPCALL_NORM);
1927 BTFIXUPSET_CALL(mmu_v2p, srmmu_s_v2p, BTFIXUPCALL_NORM);
1928 BTFIXUPSET_CALL(mmu_p2v, srmmu_s_p2v, BTFIXUPCALL_NORM);
1929 if (BTFIXUPVAL_CALL(flush_chunk) == (unsigned long)viking_flush_chunk)
1930 BTFIXUPSET_CALL(flush_chunk, viking_s_flush_chunk, BTFIXUPCALL_NORM);
1931 }
1932 btfixup();
1933
1934 return; /* SUCCESS! */
1935 }
1936
1937 /* Paging initialization on the Sparc Reference MMU. */
1938 extern unsigned long free_area_init(unsigned long, unsigned long);
1939 extern unsigned long sparc_context_init(unsigned long, int);
1940
1941 extern int physmem_mapped_contig;
1942 extern int linux_num_cpus;
1943
1944 void (*poke_srmmu)(void) __initdata = NULL;
1945
1946 unsigned long __init srmmu_paging_init(unsigned long start_mem, unsigned long end_mem)
1947 {
1948 unsigned long ptables_start;
1949 int i, cpunode;
1950 char node_str[128];
1951
1952 sparc_iobase_vaddr = 0xfd000000; /* 16MB of IOSPACE on all sun4m's. */
1953 physmem_mapped_contig = 0; /* for init.c:taint_real_pages() */
1954
1955 if (sparc_cpu_model == sun4d)
1956 num_contexts = 65536; /* We know it is Viking */
1957 else {
1958 /* Find the number of contexts on the srmmu. */
1959 cpunode = prom_getchild(prom_root_node);
1960 num_contexts = 0;
1961 while(cpunode != 0) {
1962 prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
1963 if(!strcmp(node_str, "cpu")) {
1964 num_contexts = prom_getintdefault(cpunode, "mmu-nctx", 0x8);
1965 break;
1966 }
1967 cpunode = prom_getsibling(cpunode);
1968 }
1969 }
1970
1971 if(!num_contexts) {
1972 prom_printf("Something wrong, can't find cpu node in paging_init.\n");
1973 prom_halt();
1974 }
1975
1976 ptables_start = mempool = PAGE_ALIGN(start_mem);
1977 memset(swapper_pg_dir, 0, PAGE_SIZE);
1978 kbpage = srmmu_hwprobe(KERNBASE + PAGE_SIZE);
1979 kbpage = (kbpage & SRMMU_PTE_PMASK) << 4;
1980 kbpage -= PAGE_SIZE;
1981
1982 srmmu_allocate_ptable_skeleton(KERNBASE, end_mem);
1983 #if CONFIG_SUN_IO
1984 srmmu_allocate_ptable_skeleton(sparc_iobase_vaddr, IOBASE_END);
1985 srmmu_allocate_ptable_skeleton(DVMA_VADDR, DVMA_END);
1986 #endif
1987
1988 mempool = PAGE_ALIGN(mempool);
1989 srmmu_inherit_prom_mappings(0xfe400000,(LINUX_OPPROM_ENDVM-PAGE_SIZE));
1990 map_kernel();
1991 srmmu_context_table = sparc_init_alloc(&mempool, num_contexts*sizeof(ctxd_t));
1992 srmmu_ctx_table_phys = (ctxd_t *) srmmu_v2p((unsigned long) srmmu_context_table);
1993 for(i = 0; i < num_contexts; i++)
1994 ctxd_set(&srmmu_context_table[i], swapper_pg_dir);
1995
1996 start_mem = PAGE_ALIGN(mempool);
1997
1998 flush_cache_all();
1999 if(BTFIXUPVAL_CALL(flush_page_for_dma) == (unsigned long)viking_flush_page) {
2000 unsigned long start = ptables_start;
2001 unsigned long end = start_mem;
2002
2003 while(start < end) {
2004 viking_flush_page(start);
2005 start += PAGE_SIZE;
2006 }
2007 }
2008 srmmu_set_ctable_ptr((unsigned long) srmmu_ctx_table_phys);
2009 flush_tlb_all();
2010 poke_srmmu();
2011
2012 start_mem = sparc_context_init(start_mem, num_contexts);
2013 start_mem = free_area_init(start_mem, end_mem);
2014
2015 #ifdef CONFIG_BLK_DEV_INITRD
2016 /* If initial ramdisk was specified with physical address,
2017 translate it here, as the p2v translation in srmmu
2018 is not straightforward. */
2019 if (initrd_start && initrd_start < KERNBASE) {
2020 initrd_start = srmmu_p2v(initrd_start);
2021 initrd_end = srmmu_p2v(initrd_end);
2022 if (initrd_end <= initrd_start)
2023 initrd_start = 0;
2024 }
2025 #endif
2026
2027 return PAGE_ALIGN(start_mem);
2028 }
2029
2030 static int srmmu_mmu_info(char *buf)
2031 {
2032 return sprintf(buf,
2033 "MMU type\t: %s\n"
2034 "invall\t\t: %d\n"
2035 "invmm\t\t: %d\n"
2036 "invrnge\t\t: %d\n"
2037 "invpg\t\t: %d\n"
2038 "contexts\t: %d\n"
2039 , srmmu_name,
2040 module_stats.invall,
2041 module_stats.invmm,
2042 module_stats.invrnge,
2043 module_stats.invpg,
2044 num_contexts
2045 );
2046 }
2047
2048 static void srmmu_update_mmu_cache(struct vm_area_struct * vma, unsigned long address, pte_t pte)
2049 {
2050 }
2051
2052 static void srmmu_destroy_context(struct mm_struct *mm)
2053 {
2054 if(mm->context != NO_CONTEXT && atomic_read(&mm->count) == 1) {
2055 /* XXX This could be drastically improved.
2056 * XXX We are only called from __exit_mm and it just did
2057 * XXX cache/tlb mm flush and right after this will (re-)
2058 * XXX SET_PAGE_DIR to swapper_pg_dir. -DaveM
2059 */
2060 flush_cache_mm(mm);
2061 ctxd_set(&srmmu_context_table[mm->context], swapper_pg_dir);
2062 flush_tlb_mm(mm);
2063 free_context(mm->context);
2064 mm->context = NO_CONTEXT;
2065 }
2066 }
2067
2068 static void srmmu_vac_update_mmu_cache(struct vm_area_struct * vma,
2069 unsigned long address, pte_t pte)
2070 {
2071 if((vma->vm_flags & (VM_WRITE|VM_SHARED)) == (VM_WRITE|VM_SHARED)) {
2072 struct vm_area_struct *vmaring;
2073 struct file *file;
2074 struct inode *inode;
2075 unsigned long flags, offset, vaddr, start;
2076 int alias_found = 0;
2077 pgd_t *pgdp;
2078 pmd_t *pmdp;
2079 pte_t *ptep;
2080
2081 __save_and_cli(flags);
2082
2083 file = vma->vm_file;
2084 if (!file)
2085 goto done;
2086 inode = file->f_dentry->d_inode;
2087 offset = (address & PAGE_MASK) - vma->vm_start;
2088 spin_lock(&inode->i_shared_lock);
2089 vmaring = inode->i_mmap;
2090 do {
2091 /* Do not mistake ourselves as another mapping. */
2092 if(vmaring == vma)
2093 continue;
2094
2095 vaddr = vmaring->vm_start + offset;
2096 if ((vaddr ^ address) & vac_badbits) {
2097 alias_found++;
2098 start = vmaring->vm_start;
2099 while (start < vmaring->vm_end) {
2100 pgdp = srmmu_pgd_offset(vmaring->vm_mm, start);
2101 if(!pgdp) goto next;
2102 pmdp = srmmu_pmd_offset(pgdp, start);
2103 if(!pmdp) goto next;
2104 ptep = srmmu_pte_offset(pmdp, start);
2105 if(!ptep) goto next;
2106
2107 if((pte_val(*ptep) & SRMMU_ET_MASK) == SRMMU_VALID) {
2108 #if 0
2109 printk("Fixing USER/USER alias [%ld:%08lx]\n",
2110 vmaring->vm_mm->context, start);
2111 #endif
2112 flush_cache_page(vmaring, start);
2113 set_pte(ptep, __pte((pte_val(*ptep) &
2114 ~SRMMU_CACHE)));
2115 flush_tlb_page(vmaring, start);
2116 }
2117 next:
2118 start += PAGE_SIZE;
2119 }
2120 }
2121 } while ((vmaring = vmaring->vm_next_share) != NULL);
2122 spin_unlock(&inode->i_shared_lock);
2123
2124 if(alias_found && ((pte_val(pte) & SRMMU_CACHE) != 0)) {
2125 pgdp = srmmu_pgd_offset(vma->vm_mm, address);
2126 pmdp = srmmu_pmd_offset(pgdp, address);
2127 ptep = srmmu_pte_offset(pmdp, address);
2128 flush_cache_page(vma, address);
2129 set_pte(ptep, __pte((pte_val(*ptep) & ~SRMMU_CACHE)));
2130 flush_tlb_page(vma, address);
2131 }
2132 done:
2133 __restore_flags(flags);
2134 }
2135 }
2136
2137 static void hypersparc_destroy_context(struct mm_struct *mm)
2138 {
2139 if(mm->context != NO_CONTEXT && atomic_read(&mm->count) == 1) {
2140 ctxd_t *ctxp;
2141
2142 /* HyperSparc is copy-back, any data for this
2143 * process in a modified cache line is stale
2144 * and must be written back to main memory now
2145 * else we eat shit later big time.
2146 */
2147 flush_cache_mm(mm);
2148
2149 ctxp = &srmmu_context_table[mm->context];
2150 srmmu_set_entry((pte_t *)ctxp, __pte((SRMMU_ET_PTD | (srmmu_v2p((unsigned long) swapper_pg_dir) >> 4))));
2151 hypersparc_flush_page_to_ram((unsigned long)ctxp);
2152
2153 flush_tlb_mm(mm);
2154 free_context(mm->context);
2155 mm->context = NO_CONTEXT;
2156 }
2157 }
2158
2159 /* Init various srmmu chip types. */
2160 static void __init srmmu_is_bad(void)
2161 {
2162 prom_printf("Could not determine SRMMU chip type.\n");
2163 prom_halt();
2164 }
2165
2166 static void __init init_vac_layout(void)
2167 {
2168 int nd, cache_lines;
2169 char node_str[128];
2170 #ifdef __SMP__
2171 int cpu = 0;
2172 unsigned long max_size = 0;
2173 unsigned long min_line_size = 0x10000000;
2174 #endif
2175
2176 nd = prom_getchild(prom_root_node);
2177 while((nd = prom_getsibling(nd)) != 0) {
2178 prom_getstring(nd, "device_type", node_str, sizeof(node_str));
2179 if(!strcmp(node_str, "cpu")) {
2180 vac_line_size = prom_getint(nd, "cache-line-size");
2181 if (vac_line_size == -1) {
2182 prom_printf("can't determine cache-line-size, "
2183 "halting.\n");
2184 prom_halt();
2185 }
2186 cache_lines = prom_getint(nd, "cache-nlines");
2187 if (cache_lines == -1) {
2188 prom_printf("can't determine cache-nlines, halting.\n");
2189 prom_halt();
2190 }
2191
2192 vac_cache_size = cache_lines * vac_line_size;
2193 vac_badbits = (vac_cache_size - 1) & PAGE_MASK;
2194 #ifdef __SMP__
2195 if(vac_cache_size > max_size)
2196 max_size = vac_cache_size;
2197 if(vac_line_size < min_line_size)
2198 min_line_size = vac_line_size;
2199 cpu++;
2200 if(cpu == smp_num_cpus)
2201 break;
2202 #else
2203 break;
2204 #endif
2205 }
2206 }
2207 if(nd == 0) {
2208 prom_printf("No CPU nodes found, halting.\n");
2209 prom_halt();
2210 }
2211 #ifdef __SMP__
2212 vac_cache_size = max_size;
2213 vac_line_size = min_line_size;
2214 vac_badbits = (vac_cache_size - 1) & PAGE_MASK;
2215 #endif
2216 printk("SRMMU: Using VAC size of %d bytes, line size %d bytes.\n",
2217 (int)vac_cache_size, (int)vac_line_size);
2218 }
2219
2220 static void __init poke_hypersparc(void)
2221 {
2222 volatile unsigned long clear;
2223 unsigned long mreg = srmmu_get_mmureg();
2224
2225 hyper_flush_unconditional_combined();
2226
2227 mreg &= ~(HYPERSPARC_CWENABLE);
2228 mreg |= (HYPERSPARC_CENABLE | HYPERSPARC_WBENABLE);
2229 mreg |= (HYPERSPARC_CMODE);
2230
2231 srmmu_set_mmureg(mreg);
2232
2233 #if 0 /* I think this is bad news... -DaveM */
2234 hyper_clear_all_tags();
2235 #endif
2236
2237 put_ross_icr(HYPERSPARC_ICCR_FTD | HYPERSPARC_ICCR_ICE);
2238 hyper_flush_whole_icache();
2239 clear = srmmu_get_faddr();
2240 clear = srmmu_get_fstatus();
2241 }
2242
2243 static void __init init_hypersparc(void)
2244 {
2245 srmmu_name = "ROSS HyperSparc";
2246
2247 init_vac_layout();
2248
2249 BTFIXUPSET_CALL(set_pte, srmmu_set_pte_nocache_hyper, BTFIXUPCALL_NORM);
2250 BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
2251 BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
2252 BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
2253 BTFIXUPSET_CALL(flush_cache_all, hypersparc_flush_cache_all, BTFIXUPCALL_NORM);
2254 BTFIXUPSET_CALL(flush_cache_mm, hypersparc_flush_cache_mm, BTFIXUPCALL_NORM);
2255 BTFIXUPSET_CALL(flush_cache_range, hypersparc_flush_cache_range, BTFIXUPCALL_NORM);
2256 BTFIXUPSET_CALL(flush_cache_page, hypersparc_flush_cache_page, BTFIXUPCALL_NORM);
2257
2258 BTFIXUPSET_CALL(flush_tlb_all, hypersparc_flush_tlb_all, BTFIXUPCALL_NORM);
2259 BTFIXUPSET_CALL(flush_tlb_mm, hypersparc_flush_tlb_mm, BTFIXUPCALL_NORM);
2260 BTFIXUPSET_CALL(flush_tlb_range, hypersparc_flush_tlb_range, BTFIXUPCALL_NORM);
2261 BTFIXUPSET_CALL(flush_tlb_page, hypersparc_flush_tlb_page, BTFIXUPCALL_NORM);
2262
2263 BTFIXUPSET_CALL(flush_page_to_ram, hypersparc_flush_page_to_ram, BTFIXUPCALL_NORM);
2264 BTFIXUPSET_CALL(flush_sig_insns, hypersparc_flush_sig_insns, BTFIXUPCALL_NORM);
2265 BTFIXUPSET_CALL(flush_page_for_dma, hypersparc_flush_page_for_dma, BTFIXUPCALL_NOP);
2266
2267 BTFIXUPSET_CALL(flush_chunk, hypersparc_flush_chunk, BTFIXUPCALL_NORM); /* local flush _only_ */
2268
2269 BTFIXUPSET_CALL(ctxd_set, hypersparc_ctxd_set, BTFIXUPCALL_NORM);
2270 BTFIXUPSET_CALL(switch_to_context, hypersparc_switch_to_context, BTFIXUPCALL_NORM);
2271 BTFIXUPSET_CALL(init_new_context, hypersparc_init_new_context, BTFIXUPCALL_NORM);
2272 BTFIXUPSET_CALL(destroy_context, hypersparc_destroy_context, BTFIXUPCALL_NORM);
2273 BTFIXUPSET_CALL(update_mmu_cache, srmmu_vac_update_mmu_cache, BTFIXUPCALL_NORM);
2274 BTFIXUPSET_CALL(sparc_update_rootmmu_dir, hypersparc_update_rootmmu_dir, BTFIXUPCALL_NORM);
2275 poke_srmmu = poke_hypersparc;
2276
2277 hypersparc_setup_blockops();
2278 }
2279
2280 static void __init poke_cypress(void)
2281 {
2282 unsigned long mreg = srmmu_get_mmureg();
2283 unsigned long faddr, tagval;
2284 volatile unsigned long cypress_sucks;
2285 volatile unsigned long clear;
2286
2287 clear = srmmu_get_faddr();
2288 clear = srmmu_get_fstatus();
2289
2290 if (!(mreg & CYPRESS_CENABLE)) {
2291 for(faddr = 0x0; faddr < 0x10000; faddr += 20) {
2292 __asm__ __volatile__("sta %%g0, [%0 + %1] %2\n\t"
2293 "sta %%g0, [%0] %2\n\t" : :
2294 "r" (faddr), "r" (0x40000),
2295 "i" (ASI_M_DATAC_TAG));
2296 }
2297 } else {
2298 for(faddr = 0; faddr < 0x10000; faddr += 0x20) {
2299 __asm__ __volatile__("lda [%1 + %2] %3, %0\n\t" :
2300 "=r" (tagval) :
2301 "r" (faddr), "r" (0x40000),
2302 "i" (ASI_M_DATAC_TAG));
2303
2304 /* If modified and valid, kick it. */
2305 if((tagval & 0x60) == 0x60)
2306 cypress_sucks = *(unsigned long *)
2307 (0xf0020000 + faddr);
2308 }
2309 }
2310
2311 /* And one more, for our good neighbor, Mr. Broken Cypress. */
2312 clear = srmmu_get_faddr();
2313 clear = srmmu_get_fstatus();
2314
2315 mreg |= (CYPRESS_CENABLE | CYPRESS_CMODE);
2316 srmmu_set_mmureg(mreg);
2317 }
2318
2319 static void __init init_cypress_common(void)
2320 {
2321 init_vac_layout();
2322
2323 BTFIXUPSET_CALL(set_pte, srmmu_set_pte_nocache_cypress, BTFIXUPCALL_NORM);
2324 BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
2325 BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
2326 BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
2327 BTFIXUPSET_CALL(flush_cache_all, cypress_flush_cache_all, BTFIXUPCALL_NORM);
2328 BTFIXUPSET_CALL(flush_cache_mm, cypress_flush_cache_mm, BTFIXUPCALL_NORM);
2329 BTFIXUPSET_CALL(flush_cache_range, cypress_flush_cache_range, BTFIXUPCALL_NORM);
2330 BTFIXUPSET_CALL(flush_cache_page, cypress_flush_cache_page, BTFIXUPCALL_NORM);
2331
2332 BTFIXUPSET_CALL(flush_tlb_all, cypress_flush_tlb_all, BTFIXUPCALL_NORM);
2333 BTFIXUPSET_CALL(flush_tlb_mm, cypress_flush_tlb_mm, BTFIXUPCALL_NORM);
2334 BTFIXUPSET_CALL(flush_tlb_page, cypress_flush_tlb_page, BTFIXUPCALL_NORM);
2335 BTFIXUPSET_CALL(flush_tlb_range, cypress_flush_tlb_range, BTFIXUPCALL_NORM);
2336
2337 BTFIXUPSET_CALL(flush_chunk, cypress_flush_chunk, BTFIXUPCALL_NORM); /* local flush _only_ */
2338
2339 BTFIXUPSET_CALL(flush_page_to_ram, cypress_flush_page_to_ram, BTFIXUPCALL_NORM);
2340 BTFIXUPSET_CALL(flush_sig_insns, cypress_flush_sig_insns, BTFIXUPCALL_NOP);
2341 BTFIXUPSET_CALL(flush_page_for_dma, cypress_flush_page_for_dma, BTFIXUPCALL_NOP);
2342 BTFIXUPSET_CALL(sparc_update_rootmmu_dir, cypress_update_rootmmu_dir, BTFIXUPCALL_NORM);
2343
2344 BTFIXUPSET_CALL(update_mmu_cache, srmmu_vac_update_mmu_cache, BTFIXUPCALL_NORM);
2345 poke_srmmu = poke_cypress;
2346 }
2347
2348 static void __init init_cypress_604(void)
2349 {
2350 srmmu_name = "ROSS Cypress-604(UP)";
2351 srmmu_modtype = Cypress;
2352 init_cypress_common();
2353 }
2354
2355 static void __init init_cypress_605(unsigned long mrev)
2356 {
2357 srmmu_name = "ROSS Cypress-605(MP)";
2358 if(mrev == 0xe) {
2359 srmmu_modtype = Cypress_vE;
2360 hwbug_bitmask |= HWBUG_COPYBACK_BROKEN;
2361 } else {
2362 if(mrev == 0xd) {
2363 srmmu_modtype = Cypress_vD;
2364 hwbug_bitmask |= HWBUG_ASIFLUSH_BROKEN;
2365 } else {
2366 srmmu_modtype = Cypress;
2367 }
2368 }
2369 init_cypress_common();
2370 }
2371
2372 static void __init poke_swift(void)
2373 {
2374 unsigned long mreg = srmmu_get_mmureg();
2375
2376 /* Clear any crap from the cache or else... */
2377 swift_idflash_clear();
2378 mreg |= (SWIFT_IE | SWIFT_DE); /* I & D caches on */
2379
2380 /* The Swift branch folding logic is completely broken. At
2381 * trap time, if things are just right, if can mistakenly
2382 * think that a trap is coming from kernel mode when in fact
2383 * it is coming from user mode (it mis-executes the branch in
2384 * the trap code). So you see things like crashme completely
2385 * hosing your machine which is completely unacceptable. Turn
2386 * this shit off... nice job Fujitsu.
2387 */
2388 mreg &= ~(SWIFT_BF);
2389 srmmu_set_mmureg(mreg);
2390 }
2391
2392 #define SWIFT_MASKID_ADDR 0x10003018
2393 static void __init init_swift(void)
2394 {
2395 unsigned long swift_rev;
2396
2397 __asm__ __volatile__("lda [%1] %2, %0\n\t"
2398 "srl %0, 0x18, %0\n\t" :
2399 "=r" (swift_rev) :
2400 "r" (SWIFT_MASKID_ADDR), "i" (ASI_M_BYPASS));
2401 srmmu_name = "Fujitsu Swift";
2402 switch(swift_rev) {
2403 case 0x11:
2404 case 0x20:
2405 case 0x23:
2406 case 0x30:
2407 srmmu_modtype = Swift_lots_o_bugs;
2408 hwbug_bitmask |= (HWBUG_KERN_ACCBROKEN | HWBUG_KERN_CBITBROKEN);
2409 /* Gee george, I wonder why Sun is so hush hush about
2410 * this hardware bug... really braindamage stuff going
2411 * on here. However I think we can find a way to avoid
2412 * all of the workaround overhead under Linux. Basically,
2413 * any page fault can cause kernel pages to become user
2414 * accessible (the mmu gets confused and clears some of
2415 * the ACC bits in kernel ptes). Aha, sounds pretty
2416 * horrible eh? But wait, after extensive testing it appears
2417 * that if you use pgd_t level large kernel pte's (like the
2418 * 4MB pages on the Pentium) the bug does not get tripped
2419 * at all. This avoids almost all of the major overhead.
2420 * Welcome to a world where your vendor tells you to,
2421 * "apply this kernel patch" instead of "sorry for the
2422 * broken hardware, send it back and we'll give you
2423 * properly functioning parts"
2424 */
2425 break;
2426 case 0x25:
2427 case 0x31:
2428 srmmu_modtype = Swift_bad_c;
2429 hwbug_bitmask |= HWBUG_KERN_CBITBROKEN;
2430 /* You see Sun allude to this hardware bug but never
2431 * admit things directly, they'll say things like,
2432 * "the Swift chip cache problems" or similar.
2433 */
2434 break;
2435 default:
2436 srmmu_modtype = Swift_ok;
2437 break;
2438 };
2439
2440 BTFIXUPSET_CALL(flush_cache_all, swift_flush_cache_all, BTFIXUPCALL_NORM);
2441 BTFIXUPSET_CALL(flush_cache_mm, swift_flush_cache_mm, BTFIXUPCALL_NORM);
2442 BTFIXUPSET_CALL(flush_cache_page, swift_flush_cache_page, BTFIXUPCALL_NORM);
2443 BTFIXUPSET_CALL(flush_cache_range, swift_flush_cache_range, BTFIXUPCALL_NORM);
2444
2445 BTFIXUPSET_CALL(flush_chunk, swift_flush_chunk, BTFIXUPCALL_NOP); /* local flush _only_ */
2446
2447 BTFIXUPSET_CALL(flush_tlb_all, swift_flush_tlb_all, BTFIXUPCALL_NORM);
2448 BTFIXUPSET_CALL(flush_tlb_mm, swift_flush_tlb_mm, BTFIXUPCALL_NORM);
2449 BTFIXUPSET_CALL(flush_tlb_page, swift_flush_tlb_page, BTFIXUPCALL_NORM);
2450 BTFIXUPSET_CALL(flush_tlb_range, swift_flush_tlb_range, BTFIXUPCALL_NORM);
2451
2452 BTFIXUPSET_CALL(flush_page_to_ram, swift_flush_page_to_ram, BTFIXUPCALL_NOP);
2453 BTFIXUPSET_CALL(flush_sig_insns, swift_flush_sig_insns, BTFIXUPCALL_NORM);
2454 BTFIXUPSET_CALL(flush_page_for_dma, swift_flush_page_for_dma, BTFIXUPCALL_NORM);
2455
2456 BTFIXUPSET_CALL(update_mmu_cache, swift_update_mmu_cache, BTFIXUPCALL_NORM);
2457
2458 /* Are you now convinced that the Swift is one of the
2459 * biggest VLSI abortions of all time? Bravo Fujitsu!
2460 * Fujitsu, the !#?!%$'d up processor people. I bet if
2461 * you examined the microcode of the Swift you'd find
2462 * XXX's all over the place.
2463 */
2464 poke_srmmu = poke_swift;
2465 }
2466
2467 static void turbosparc_flush_cache_all(void)
2468 {
2469 flush_user_windows();
2470 turbosparc_idflash_clear();
2471 }
2472
2473 static void turbosparc_flush_cache_mm(struct mm_struct *mm)
2474 {
2475 FLUSH_BEGIN(mm)
2476 flush_user_windows();
2477 turbosparc_idflash_clear();
2478 FLUSH_END
2479 }
2480
2481 static void turbosparc_flush_cache_range(struct mm_struct *mm, unsigned long start, unsigned long end)
2482 {
2483 FLUSH_BEGIN(mm)
2484 flush_user_windows();
2485 turbosparc_idflash_clear();
2486 FLUSH_END
2487 }
2488
2489 static void turbosparc_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
2490 {
2491 FLUSH_BEGIN(vma->vm_mm)
2492 flush_user_windows();
2493 if (vma->vm_flags & VM_EXEC)
2494 turbosparc_flush_icache();
2495 turbosparc_flush_dcache();
2496 FLUSH_END
2497 }
2498
2499 /* TurboSparc is copy-back, if we turn it on, but this does not work. */
2500 static void turbosparc_flush_page_to_ram(unsigned long page)
2501 {
2502 #ifdef TURBOSPARC_WRITEBACK
2503 volatile unsigned long clear;
2504
2505 if (srmmu_hwprobe(page))
2506 turbosparc_flush_page_cache(page);
2507 clear = srmmu_get_fstatus();
2508 #endif
2509 }
2510
2511 static void turbosparc_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
2512 {
2513 }
2514
2515 static void turbosparc_flush_page_for_dma(unsigned long page)
2516 {
2517 turbosparc_flush_dcache();
2518 }
2519
2520 static void turbosparc_flush_chunk(unsigned long chunk)
2521 {
2522 }
2523
2524 static void turbosparc_flush_tlb_all(void)
2525 {
2526 srmmu_flush_whole_tlb();
2527 module_stats.invall++;
2528 }
2529
2530 static void turbosparc_flush_tlb_mm(struct mm_struct *mm)
2531 {
2532 FLUSH_BEGIN(mm)
2533 srmmu_flush_whole_tlb();
2534 module_stats.invmm++;
2535 FLUSH_END
2536 }
2537
2538 static void turbosparc_flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end)
2539 {
2540 FLUSH_BEGIN(mm)
2541 srmmu_flush_whole_tlb();
2542 module_stats.invrnge++;
2543 FLUSH_END
2544 }
2545
2546 static void turbosparc_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
2547 {
2548 FLUSH_BEGIN(vma->vm_mm)
2549 srmmu_flush_whole_tlb();
2550 module_stats.invpg++;
2551 FLUSH_END
2552 }
2553
2554
2555 static void __init poke_turbosparc(void)
2556 {
2557 unsigned long mreg = srmmu_get_mmureg();
2558 unsigned long ccreg;
2559
2560 /* Clear any crap from the cache or else... */
2561 turbosparc_flush_cache_all();
2562 mreg &= ~(TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* Temporarily disable I & D caches */
2563 mreg &= ~(TURBOSPARC_PCENABLE); /* Don't check parity */
2564 srmmu_set_mmureg(mreg);
2565
2566 ccreg = turbosparc_get_ccreg();
2567
2568 #ifdef TURBOSPARC_WRITEBACK
2569 ccreg |= (TURBOSPARC_SNENABLE); /* Do DVMA snooping in Dcache */
2570 ccreg &= ~(TURBOSPARC_uS2 | TURBOSPARC_WTENABLE);
2571 /* Write-back D-cache, emulate VLSI
2572 * abortion number three, not number one */
2573 #else
2574 /* For now let's play safe, optimize later */
2575 ccreg |= (TURBOSPARC_SNENABLE | TURBOSPARC_WTENABLE);
2576 /* Do DVMA snooping in Dcache, Write-thru D-cache */
2577 ccreg &= ~(TURBOSPARC_uS2);
2578 /* Emulate VLSI abortion number three, not number one */
2579 #endif
2580
2581 switch (ccreg & 7) {
2582 case 0: /* No SE cache */
2583 case 7: /* Test mode */
2584 break;
2585 default:
2586 ccreg |= (TURBOSPARC_SCENABLE);
2587 }
2588 turbosparc_set_ccreg (ccreg);
2589
2590 mreg |= (TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* I & D caches on */
2591 mreg |= (TURBOSPARC_ICSNOOP); /* Icache snooping on */
2592 srmmu_set_mmureg(mreg);
2593 }
2594
2595 static void __init init_turbosparc(void)
2596 {
2597 srmmu_name = "Fujitsu TurboSparc";
2598 srmmu_modtype = TurboSparc;
2599
2600 BTFIXUPSET_CALL(flush_cache_all, turbosparc_flush_cache_all, BTFIXUPCALL_NORM);
2601 BTFIXUPSET_CALL(flush_cache_mm, turbosparc_flush_cache_mm, BTFIXUPCALL_NORM);
2602 BTFIXUPSET_CALL(flush_cache_page, turbosparc_flush_cache_page, BTFIXUPCALL_NORM);
2603 BTFIXUPSET_CALL(flush_cache_range, turbosparc_flush_cache_range, BTFIXUPCALL_NORM);
2604
2605 BTFIXUPSET_CALL(flush_tlb_all, turbosparc_flush_tlb_all, BTFIXUPCALL_NORM);
2606 BTFIXUPSET_CALL(flush_tlb_mm, turbosparc_flush_tlb_mm, BTFIXUPCALL_NORM);
2607 BTFIXUPSET_CALL(flush_tlb_page, turbosparc_flush_tlb_page, BTFIXUPCALL_NORM);
2608 BTFIXUPSET_CALL(flush_tlb_range, turbosparc_flush_tlb_range, BTFIXUPCALL_NORM);
2609
2610 BTFIXUPSET_CALL(flush_page_to_ram, turbosparc_flush_page_to_ram, BTFIXUPCALL_NORM);
2611 BTFIXUPSET_CALL(flush_chunk, turbosparc_flush_chunk, BTFIXUPCALL_NORM);
2612
2613 BTFIXUPSET_CALL(flush_sig_insns, turbosparc_flush_sig_insns, BTFIXUPCALL_NOP);
2614 BTFIXUPSET_CALL(flush_page_for_dma, turbosparc_flush_page_for_dma, BTFIXUPCALL_NOP);
2615
2616 poke_srmmu = poke_turbosparc;
2617 }
2618
2619 static void __init poke_tsunami(void)
2620 {
2621 unsigned long mreg = srmmu_get_mmureg();
2622
2623 tsunami_flush_icache();
2624 tsunami_flush_dcache();
2625 mreg &= ~TSUNAMI_ITD;
2626 mreg |= (TSUNAMI_IENAB | TSUNAMI_DENAB);
2627 srmmu_set_mmureg(mreg);
2628 }
2629
2630 static void __init init_tsunami(void)
2631 {
2632 /* Tsunami's pretty sane, Sun and TI actually got it
2633 * somewhat right this time. Fujitsu should have
2634 * taken some lessons from them.
2635 */
2636
2637 srmmu_name = "TI Tsunami";
2638 srmmu_modtype = Tsunami;
2639
2640 BTFIXUPSET_CALL(flush_cache_all, tsunami_flush_cache_all, BTFIXUPCALL_NORM);
2641 BTFIXUPSET_CALL(flush_cache_mm, tsunami_flush_cache_mm, BTFIXUPCALL_NORM);
2642 BTFIXUPSET_CALL(flush_cache_page, tsunami_flush_cache_page, BTFIXUPCALL_NORM);
2643 BTFIXUPSET_CALL(flush_cache_range, tsunami_flush_cache_range, BTFIXUPCALL_NORM);
2644
2645 BTFIXUPSET_CALL(flush_chunk, tsunami_flush_chunk, BTFIXUPCALL_NOP); /* local flush _only_ */
2646
2647 BTFIXUPSET_CALL(flush_tlb_all, tsunami_flush_tlb_all, BTFIXUPCALL_NORM);
2648 BTFIXUPSET_CALL(flush_tlb_mm, tsunami_flush_tlb_mm, BTFIXUPCALL_NORM);
2649 BTFIXUPSET_CALL(flush_tlb_page, tsunami_flush_tlb_page, BTFIXUPCALL_NORM);
2650 BTFIXUPSET_CALL(flush_tlb_range, tsunami_flush_tlb_range, BTFIXUPCALL_NORM);
2651
2652 BTFIXUPSET_CALL(flush_page_to_ram, tsunami_flush_page_to_ram, BTFIXUPCALL_NOP);
2653 BTFIXUPSET_CALL(flush_sig_insns, tsunami_flush_sig_insns, BTFIXUPCALL_NORM);
2654 BTFIXUPSET_CALL(flush_page_for_dma, tsunami_flush_page_for_dma, BTFIXUPCALL_NORM);
2655
2656 poke_srmmu = poke_tsunami;
2657 }
2658
2659 static void __init poke_viking(void)
2660 {
2661 unsigned long mreg = srmmu_get_mmureg();
2662 static int smp_catch = 0;
2663
2664 if(viking_mxcc_present) {
2665 unsigned long mxcc_control = mxcc_get_creg();
2666
2667 mxcc_control |= (MXCC_CTL_ECE | MXCC_CTL_PRE | MXCC_CTL_MCE);
2668 mxcc_control &= ~(MXCC_CTL_RRC);
2669 mxcc_set_creg(mxcc_control);
2670
2671 /* We don't need memory parity checks.
2672 * XXX This is a mess, have to dig out later. ecd.
2673 viking_mxcc_turn_off_parity(&mreg, &mxcc_control);
2674 */
2675
2676 /* We do cache ptables on MXCC. */
2677 mreg |= VIKING_TCENABLE;
2678 } else {
2679 unsigned long bpreg;
2680
2681 mreg &= ~(VIKING_TCENABLE);
2682 if(smp_catch++) {
2683 /* Must disable mixed-cmd mode here for
2684 * other cpu's.
2685 */
2686 bpreg = viking_get_bpreg();
2687 bpreg &= ~(VIKING_ACTION_MIX);
2688 viking_set_bpreg(bpreg);
2689
2690 /* Just in case PROM does something funny. */
2691 msi_set_sync();
2692 }
2693 }
2694
2695 mreg |= VIKING_SPENABLE;
2696 mreg |= (VIKING_ICENABLE | VIKING_DCENABLE);
2697 mreg |= VIKING_SBENABLE;
2698 mreg &= ~(VIKING_ACENABLE);
2699 srmmu_set_mmureg(mreg);
2700
2701 #ifdef __SMP__
2702 /* Avoid unnecessary cross calls. */
2703 BTFIXUPCOPY_CALL(flush_cache_all, local_flush_cache_all);
2704 BTFIXUPCOPY_CALL(flush_cache_mm, local_flush_cache_mm);
2705 BTFIXUPCOPY_CALL(flush_cache_range, local_flush_cache_range);
2706 BTFIXUPCOPY_CALL(flush_cache_page, local_flush_cache_page);
2707 BTFIXUPCOPY_CALL(flush_page_to_ram, local_flush_page_to_ram);
2708 BTFIXUPCOPY_CALL(flush_sig_insns, local_flush_sig_insns);
2709 BTFIXUPCOPY_CALL(flush_page_for_dma, local_flush_page_for_dma);
2710 btfixup();
2711 #endif
2712 }
2713
2714 static void __init init_viking(void)
2715 {
2716 unsigned long mreg = srmmu_get_mmureg();
2717
2718 /* Ahhh, the viking. SRMMU VLSI abortion number two... */
2719 if(mreg & VIKING_MMODE) {
2720 srmmu_name = "TI Viking";
2721 viking_mxcc_present = 0;
2722 msi_set_sync();
2723
2724 BTFIXUPSET_CALL(set_pte, srmmu_set_pte_nocache_viking, BTFIXUPCALL_NORM);
2725 BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
2726 BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
2727 BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
2728 BTFIXUPSET_CALL(sparc_update_rootmmu_dir, viking_update_rootmmu_dir, BTFIXUPCALL_NORM);
2729
2730 BTFIXUPSET_CALL(flush_chunk, viking_flush_chunk, BTFIXUPCALL_NORM); /* local flush _only_ */
2731
2732 /* We need this to make sure old viking takes no hits
2733 * on it's cache for dma snoops to workaround the
2734 * "load from non-cacheable memory" interrupt bug.
2735 * This is only necessary because of the new way in
2736 * which we use the IOMMU.
2737 */
2738 BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page, BTFIXUPCALL_NORM);
2739 /* Also, this is so far the only chip which actually uses
2740 the page argument to flush_page_for_dma */
2741 flush_page_for_dma_global = 0;
2742 } else {
2743 srmmu_name = "TI Viking/MXCC";
2744 viking_mxcc_present = 1;
2745
2746 BTFIXUPSET_CALL(flush_chunk, viking_mxcc_flush_chunk, BTFIXUPCALL_NOP); /* local flush _only_ */
2747
2748 /* MXCC vikings lack the DMA snooping bug. */
2749 BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page_for_dma, BTFIXUPCALL_NOP);
2750 }
2751
2752 BTFIXUPSET_CALL(flush_cache_all, viking_flush_cache_all, BTFIXUPCALL_NORM);
2753 BTFIXUPSET_CALL(flush_cache_mm, viking_flush_cache_mm, BTFIXUPCALL_NORM);
2754 BTFIXUPSET_CALL(flush_cache_page, viking_flush_cache_page, BTFIXUPCALL_NORM);
2755 BTFIXUPSET_CALL(flush_cache_range, viking_flush_cache_range, BTFIXUPCALL_NORM);
2756
2757 #ifdef __SMP__
2758 if (sparc_cpu_model == sun4d) {
2759 BTFIXUPSET_CALL(flush_tlb_all, sun4dsmp_flush_tlb_all, BTFIXUPCALL_NORM);
2760 BTFIXUPSET_CALL(flush_tlb_mm, sun4dsmp_flush_tlb_mm, BTFIXUPCALL_NORM);
2761 BTFIXUPSET_CALL(flush_tlb_page, sun4dsmp_flush_tlb_page, BTFIXUPCALL_NORM);
2762 BTFIXUPSET_CALL(flush_tlb_range, sun4dsmp_flush_tlb_range, BTFIXUPCALL_NORM);
2763 } else
2764 #endif
2765 {
2766 BTFIXUPSET_CALL(flush_tlb_all, viking_flush_tlb_all, BTFIXUPCALL_NORM);
2767 BTFIXUPSET_CALL(flush_tlb_mm, viking_flush_tlb_mm, BTFIXUPCALL_NORM);
2768 BTFIXUPSET_CALL(flush_tlb_page, viking_flush_tlb_page, BTFIXUPCALL_NORM);
2769 BTFIXUPSET_CALL(flush_tlb_range, viking_flush_tlb_range, BTFIXUPCALL_NORM);
2770 }
2771
2772 BTFIXUPSET_CALL(flush_page_to_ram, viking_flush_page_to_ram, BTFIXUPCALL_NOP);
2773 BTFIXUPSET_CALL(flush_sig_insns, viking_flush_sig_insns, BTFIXUPCALL_NOP);
2774
2775 poke_srmmu = poke_viking;
2776 }
2777
2778 /* Probe for the srmmu chip version. */
2779 static void __init get_srmmu_type(void)
2780 {
2781 unsigned long mreg, psr;
2782 unsigned long mod_typ, mod_rev, psr_typ, psr_vers;
2783
2784 srmmu_modtype = SRMMU_INVAL_MOD;
2785 hwbug_bitmask = 0;
2786
2787 mreg = srmmu_get_mmureg(); psr = get_psr();
2788 mod_typ = (mreg & 0xf0000000) >> 28;
2789 mod_rev = (mreg & 0x0f000000) >> 24;
2790 psr_typ = (psr >> 28) & 0xf;
2791 psr_vers = (psr >> 24) & 0xf;
2792
2793 /* First, check for HyperSparc or Cypress. */
2794 if(mod_typ == 1) {
2795 switch(mod_rev) {
2796 case 7:
2797 /* UP or MP Hypersparc */
2798 init_hypersparc();
2799 break;
2800 case 0:
2801 case 2:
2802 /* Uniprocessor Cypress */
2803 init_cypress_604();
2804 break;
2805 case 10:
2806 case 11:
2807 case 12:
2808 /* _REALLY OLD_ Cypress MP chips... */
2809 case 13:
2810 case 14:
2811 case 15:
2812 /* MP Cypress mmu/cache-controller */
2813 init_cypress_605(mod_rev);
2814 break;
2815 default:
2816 /* Some other Cypress revision, assume a 605. */
2817 init_cypress_605(mod_rev);
2818 break;
2819 };
2820 return;
2821 }
2822
2823 /* Now Fujitsu TurboSparc. It might happen that it is
2824 in Swift emulation mode, so we will check later... */
2825 if (psr_typ == 0 && psr_vers == 5) {
2826 init_turbosparc();
2827 return;
2828 }
2829
2830 /* Next check for Fujitsu Swift. */
2831 if(psr_typ == 0 && psr_vers == 4) {
2832 int cpunode;
2833 char node_str[128];
2834
2835 /* Look if it is not a TurboSparc emulating Swift... */
2836 cpunode = prom_getchild(prom_root_node);
2837 while((cpunode = prom_getsibling(cpunode)) != 0) {
2838 prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
2839 if(!strcmp(node_str, "cpu")) {
2840 if (!prom_getintdefault(cpunode, "psr-implementation", 1) &&
2841 prom_getintdefault(cpunode, "psr-version", 1) == 5) {
2842 init_turbosparc();
2843 return;
2844 }
2845 break;
2846 }
2847 }
2848
2849 init_swift();
2850 return;
2851 }
2852
2853 /* Now the Viking family of srmmu. */
2854 if(psr_typ == 4 &&
2855 ((psr_vers == 0) ||
2856 ((psr_vers == 1) && (mod_typ == 0) && (mod_rev == 0)))) {
2857 init_viking();
2858 return;
2859 }
2860
2861 /* Finally the Tsunami. */
2862 if(psr_typ == 4 && psr_vers == 1 && (mod_typ || mod_rev)) {
2863 init_tsunami();
2864 return;
2865 }
2866
2867 /* Oh well */
2868 srmmu_is_bad();
2869 }
2870
2871 static int srmmu_check_pgt_cache(int low, int high)
2872 {
2873 struct page *page, *page2;
2874 int freed = 0;
2875
2876 if (pgtable_cache_size > high) {
2877 spin_lock(&pte_spinlock);
2878 for (page2 = NULL, page = (struct page *)pte_quicklist; page;) {
2879 if ((unsigned int)page->pprev_hash == 0xffff) {
2880 if (page2)
2881 page2->next_hash = page->next_hash;
2882 else
2883 (struct page *)pte_quicklist = page->next_hash;
2884 page->next_hash = NULL;
2885 page->pprev_hash = NULL;
2886 pgtable_cache_size -= 16;
2887 __free_page(page);
2888 freed++;
2889 if (page2)
2890 page = page2->next_hash;
2891 else
2892 page = (struct page *)pte_quicklist;
2893 if (pgtable_cache_size <= low)
2894 break;
2895 continue;
2896 }
2897 page2 = page;
2898 page = page->next_hash;
2899 }
2900 spin_unlock(&pte_spinlock);
2901 }
2902 if (pgd_cache_size > high / 4) {
2903 spin_lock(&pgd_spinlock);
2904 for (page2 = NULL, page = (struct page *)pgd_quicklist; page;) {
2905 if ((unsigned int)page->pprev_hash == 0xf) {
2906 if (page2)
2907 page2->next_hash = page->next_hash;
2908 else
2909 (struct page *)pgd_quicklist = page->next_hash;
2910 page->next_hash = NULL;
2911 page->pprev_hash = NULL;
2912 pgd_cache_size -= 4;
2913 __free_page(page);
2914 freed++;
2915 if (page2)
2916 page = page2->next_hash;
2917 else
2918 page = (struct page *)pgd_quicklist;
2919 if (pgd_cache_size <= low / 4)
2920 break;
2921 continue;
2922 }
2923 page2 = page;
2924 page = page->next_hash;
2925 }
2926 spin_unlock(&pgd_spinlock);
2927 }
2928 return freed;
2929 }
2930
2931 extern unsigned long spwin_mmu_patchme, fwin_mmu_patchme,
2932 tsetup_mmu_patchme, rtrap_mmu_patchme;
2933
2934 extern unsigned long spwin_srmmu_stackchk, srmmu_fwin_stackchk,
2935 tsetup_srmmu_stackchk, srmmu_rett_stackchk;
2936
2937 extern unsigned long srmmu_fault;
2938
2939 #define PATCH_BRANCH(insn, dest) do { \
2940 iaddr = &(insn); \
2941 daddr = &(dest); \
2942 *iaddr = SPARC_BRANCH((unsigned long) daddr, (unsigned long) iaddr); \
2943 } while(0);
2944
2945 static void __init patch_window_trap_handlers(void)
2946 {
2947 unsigned long *iaddr, *daddr;
2948
2949 PATCH_BRANCH(spwin_mmu_patchme, spwin_srmmu_stackchk);
2950 PATCH_BRANCH(fwin_mmu_patchme, srmmu_fwin_stackchk);
2951 PATCH_BRANCH(tsetup_mmu_patchme, tsetup_srmmu_stackchk);
2952 PATCH_BRANCH(rtrap_mmu_patchme, srmmu_rett_stackchk);
2953 PATCH_BRANCH(sparc_ttable[SP_TRAP_TFLT].inst_three, srmmu_fault);
2954 PATCH_BRANCH(sparc_ttable[SP_TRAP_DFLT].inst_three, srmmu_fault);
2955 PATCH_BRANCH(sparc_ttable[SP_TRAP_DACC].inst_three, srmmu_fault);
2956 }
2957
2958 #ifdef __SMP__
2959 /* Local cross-calls. */
2960 static void smp_flush_page_for_dma(unsigned long page)
2961 {
2962 xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_for_dma), page);
2963 }
2964
2965 #endif
2966
2967 /* Load up routines and constants for sun4m and sun4d mmu */
2968 void __init ld_mmu_srmmu(void)
2969 {
2970 extern void ld_mmu_iommu(void);
2971 extern void ld_mmu_iounit(void);
2972 extern void ___xchg32_sun4md(void);
2973
2974 /* First the constants */
2975 BTFIXUPSET_SIMM13(pmd_shift, SRMMU_PMD_SHIFT);
2976 BTFIXUPSET_SETHI(pmd_size, SRMMU_PMD_SIZE);
2977 BTFIXUPSET_SETHI(pmd_mask, SRMMU_PMD_MASK);
2978 BTFIXUPSET_SIMM13(pgdir_shift, SRMMU_PGDIR_SHIFT);
2979 BTFIXUPSET_SETHI(pgdir_size, SRMMU_PGDIR_SIZE);
2980 BTFIXUPSET_SETHI(pgdir_mask, SRMMU_PGDIR_MASK);
2981
2982 BTFIXUPSET_SIMM13(ptrs_per_pte, SRMMU_PTRS_PER_PTE);
2983 BTFIXUPSET_SIMM13(ptrs_per_pmd, SRMMU_PTRS_PER_PMD);
2984 BTFIXUPSET_SIMM13(ptrs_per_pgd, SRMMU_PTRS_PER_PGD);
2985
2986 BTFIXUPSET_INT(page_none, pgprot_val(SRMMU_PAGE_NONE));
2987 BTFIXUPSET_INT(page_shared, pgprot_val(SRMMU_PAGE_SHARED));
2988 BTFIXUPSET_INT(page_copy, pgprot_val(SRMMU_PAGE_COPY));
2989 BTFIXUPSET_INT(page_readonly, pgprot_val(SRMMU_PAGE_RDONLY));
2990 BTFIXUPSET_INT(page_kernel, pgprot_val(SRMMU_PAGE_KERNEL));
2991 pg_iobits = SRMMU_VALID | SRMMU_WRITE | SRMMU_REF;
2992
2993 /* Functions */
2994 #ifndef __SMP__
2995 BTFIXUPSET_CALL(___xchg32, ___xchg32_sun4md, BTFIXUPCALL_SWAPG1G2);
2996 #endif
2997 BTFIXUPSET_CALL(get_pte_fast, srmmu_get_pte_fast, BTFIXUPCALL_RETINT(0));
2998 BTFIXUPSET_CALL(get_pgd_fast, srmmu_get_pgd_fast, BTFIXUPCALL_RETINT(0));
2999 BTFIXUPSET_CALL(free_pte_slow, srmmu_free_pte_slow, BTFIXUPCALL_NOP);
3000 BTFIXUPSET_CALL(free_pgd_slow, srmmu_free_pgd_slow, BTFIXUPCALL_NOP);
3001 BTFIXUPSET_CALL(do_check_pgt_cache, srmmu_check_pgt_cache, BTFIXUPCALL_NORM);
3002
3003 BTFIXUPSET_CALL(set_pgdir, srmmu_set_pgdir, BTFIXUPCALL_NORM);
3004
3005 BTFIXUPSET_CALL(set_pte, srmmu_set_pte_cacheable, BTFIXUPCALL_SWAPO0O1);
3006 BTFIXUPSET_CALL(init_new_context, srmmu_init_new_context, BTFIXUPCALL_NORM);
3007 BTFIXUPSET_CALL(switch_to_context, srmmu_switch_to_context, BTFIXUPCALL_NORM);
3008
3009 BTFIXUPSET_CALL(pte_page, srmmu_pte_page, BTFIXUPCALL_NORM);
3010 BTFIXUPSET_CALL(pmd_page, srmmu_pmd_page, BTFIXUPCALL_NORM);
3011 BTFIXUPSET_CALL(pgd_page, srmmu_pgd_page, BTFIXUPCALL_NORM);
3012
3013 BTFIXUPSET_CALL(sparc_update_rootmmu_dir, srmmu_update_rootmmu_dir, BTFIXUPCALL_NORM);
3014
3015 BTFIXUPSET_SETHI(none_mask, 0xF0000000);
3016
3017 BTFIXUPSET_CALL(pte_present, srmmu_pte_present, BTFIXUPCALL_NORM);
3018 BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_SWAPO0G0);
3019
3020 BTFIXUPSET_CALL(pmd_bad, srmmu_pmd_bad, BTFIXUPCALL_NORM);
3021 BTFIXUPSET_CALL(pmd_present, srmmu_pmd_present, BTFIXUPCALL_NORM);
3022 BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_SWAPO0G0);
3023
3024 BTFIXUPSET_CALL(pgd_none, srmmu_pgd_none, BTFIXUPCALL_NORM);
3025 BTFIXUPSET_CALL(pgd_bad, srmmu_pgd_bad, BTFIXUPCALL_NORM);
3026 BTFIXUPSET_CALL(pgd_present, srmmu_pgd_present, BTFIXUPCALL_NORM);
3027 BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_SWAPO0G0);
3028
3029 BTFIXUPSET_CALL(mk_pte, srmmu_mk_pte, BTFIXUPCALL_NORM);
3030 BTFIXUPSET_CALL(mk_pte_phys, srmmu_mk_pte_phys, BTFIXUPCALL_NORM);
3031 BTFIXUPSET_CALL(mk_pte_io, srmmu_mk_pte_io, BTFIXUPCALL_NORM);
3032 BTFIXUPSET_CALL(pgd_set, srmmu_pgd_set, BTFIXUPCALL_NORM);
3033
3034 BTFIXUPSET_INT(pte_modify_mask, SRMMU_CHG_MASK);
3035 BTFIXUPSET_CALL(pgd_offset, srmmu_pgd_offset, BTFIXUPCALL_NORM);
3036 BTFIXUPSET_CALL(pmd_offset, srmmu_pmd_offset, BTFIXUPCALL_NORM);
3037 BTFIXUPSET_CALL(pte_offset, srmmu_pte_offset, BTFIXUPCALL_NORM);
3038 BTFIXUPSET_CALL(pte_free_kernel, srmmu_pte_free, BTFIXUPCALL_NORM);
3039 BTFIXUPSET_CALL(pmd_free_kernel, srmmu_pmd_free, BTFIXUPCALL_NORM);
3040 BTFIXUPSET_CALL(pte_alloc_kernel, srmmu_pte_alloc, BTFIXUPCALL_NORM);
3041 BTFIXUPSET_CALL(pmd_alloc_kernel, srmmu_pmd_alloc, BTFIXUPCALL_NORM);
3042 BTFIXUPSET_CALL(pte_free, srmmu_pte_free, BTFIXUPCALL_NORM);
3043 BTFIXUPSET_CALL(pte_alloc, srmmu_pte_alloc, BTFIXUPCALL_NORM);
3044 BTFIXUPSET_CALL(pmd_free, srmmu_pmd_free, BTFIXUPCALL_NORM);
3045 BTFIXUPSET_CALL(pmd_alloc, srmmu_pmd_alloc, BTFIXUPCALL_NORM);
3046 BTFIXUPSET_CALL(pgd_free, srmmu_pgd_free, BTFIXUPCALL_NORM);
3047 BTFIXUPSET_CALL(pgd_alloc, srmmu_pgd_alloc, BTFIXUPCALL_NORM);
3048
3049 BTFIXUPSET_HALF(pte_writei, SRMMU_WRITE);
3050 BTFIXUPSET_HALF(pte_dirtyi, SRMMU_DIRTY);
3051 BTFIXUPSET_HALF(pte_youngi, SRMMU_REF);
3052 BTFIXUPSET_HALF(pte_wrprotecti, SRMMU_WRITE);
3053 BTFIXUPSET_HALF(pte_mkcleani, SRMMU_DIRTY);
3054 BTFIXUPSET_HALF(pte_mkoldi, SRMMU_REF);
3055 BTFIXUPSET_CALL(pte_mkwrite, srmmu_pte_mkwrite, BTFIXUPCALL_ORINT(SRMMU_WRITE));
3056 BTFIXUPSET_CALL(pte_mkdirty, srmmu_pte_mkdirty, BTFIXUPCALL_ORINT(SRMMU_DIRTY));
3057 BTFIXUPSET_CALL(pte_mkyoung, srmmu_pte_mkyoung, BTFIXUPCALL_ORINT(SRMMU_REF));
3058 BTFIXUPSET_CALL(update_mmu_cache, srmmu_update_mmu_cache, BTFIXUPCALL_NOP);
3059 BTFIXUPSET_CALL(destroy_context, srmmu_destroy_context, BTFIXUPCALL_NORM);
3060
3061 BTFIXUPSET_CALL(mmu_info, srmmu_mmu_info, BTFIXUPCALL_NORM);
3062 BTFIXUPSET_CALL(mmu_v2p, srmmu_v2p, BTFIXUPCALL_NORM);
3063 BTFIXUPSET_CALL(mmu_p2v, srmmu_p2v, BTFIXUPCALL_NORM);
3064
3065 /* Task struct and kernel stack allocating/freeing. */
3066 BTFIXUPSET_CALL(alloc_task_struct, srmmu_alloc_task_struct, BTFIXUPCALL_NORM);
3067 BTFIXUPSET_CALL(free_task_struct, srmmu_free_task_struct, BTFIXUPCALL_NORM);
3068
3069 BTFIXUPSET_CALL(quick_kernel_fault, srmmu_quick_kernel_fault, BTFIXUPCALL_NORM);
3070
3071 /* SRMMU specific. */
3072 BTFIXUPSET_CALL(ctxd_set, srmmu_ctxd_set, BTFIXUPCALL_NORM);
3073 BTFIXUPSET_CALL(pmd_set, srmmu_pmd_set, BTFIXUPCALL_NORM);
3074
3075 get_srmmu_type();
3076 patch_window_trap_handlers();
3077
3078 #ifdef __SMP__
3079 /* El switcheroo... */
3080
3081 BTFIXUPCOPY_CALL(local_flush_cache_all, flush_cache_all);
3082 BTFIXUPCOPY_CALL(local_flush_cache_mm, flush_cache_mm);
3083 BTFIXUPCOPY_CALL(local_flush_cache_range, flush_cache_range);
3084 BTFIXUPCOPY_CALL(local_flush_cache_page, flush_cache_page);
3085 BTFIXUPCOPY_CALL(local_flush_tlb_all, flush_tlb_all);
3086 BTFIXUPCOPY_CALL(local_flush_tlb_mm, flush_tlb_mm);
3087 BTFIXUPCOPY_CALL(local_flush_tlb_range, flush_tlb_range);
3088 BTFIXUPCOPY_CALL(local_flush_tlb_page, flush_tlb_page);
3089 BTFIXUPCOPY_CALL(local_flush_page_to_ram, flush_page_to_ram);
3090 BTFIXUPCOPY_CALL(local_flush_sig_insns, flush_sig_insns);
3091 BTFIXUPCOPY_CALL(local_flush_page_for_dma, flush_page_for_dma);
3092
3093 BTFIXUPSET_CALL(flush_cache_all, smp_flush_cache_all, BTFIXUPCALL_NORM);
3094 BTFIXUPSET_CALL(flush_cache_mm, smp_flush_cache_mm, BTFIXUPCALL_NORM);
3095 BTFIXUPSET_CALL(flush_cache_range, smp_flush_cache_range, BTFIXUPCALL_NORM);
3096 BTFIXUPSET_CALL(flush_cache_page, smp_flush_cache_page, BTFIXUPCALL_NORM);
3097 if (sparc_cpu_model != sun4d) {
3098 BTFIXUPSET_CALL(flush_tlb_all, smp_flush_tlb_all, BTFIXUPCALL_NORM);
3099 BTFIXUPSET_CALL(flush_tlb_mm, smp_flush_tlb_mm, BTFIXUPCALL_NORM);
3100 BTFIXUPSET_CALL(flush_tlb_range, smp_flush_tlb_range, BTFIXUPCALL_NORM);
3101 BTFIXUPSET_CALL(flush_tlb_page, smp_flush_tlb_page, BTFIXUPCALL_NORM);
3102 }
3103 BTFIXUPSET_CALL(flush_page_to_ram, smp_flush_page_to_ram, BTFIXUPCALL_NORM);
3104 BTFIXUPSET_CALL(flush_sig_insns, smp_flush_sig_insns, BTFIXUPCALL_NORM);
3105 BTFIXUPSET_CALL(flush_page_for_dma, smp_flush_page_for_dma, BTFIXUPCALL_NORM);
3106 #endif
3107 if (sparc_cpu_model == sun4d)
3108 ld_mmu_iounit();
3109 else
3110 ld_mmu_iommu();
3111 #ifdef __SMP__
3112 if (sparc_cpu_model == sun4d)
3113 sun4d_init_smp();
3114 else
3115 sun4m_init_smp();
3116 #endif
3117 }
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