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afs: destroy work queue on init failure
[wandboard.git] / arch / sh / mm / init.c
blobd0e249100e98d044b804414b80d725a0ebd7e43d
1 /*
2 * linux/arch/sh/mm/init.c
3 *
4 * Copyright (C) 1999 Niibe Yutaka
5 * Copyright (C) 2002 - 2010 Paul Mundt
6 *
7 * Based on linux/arch/i386/mm/init.c:
8 * Copyright (C) 1995 Linus Torvalds
9 */
10 #include <linux/mm.h>
11 #include <linux/swap.h>
12 #include <linux/init.h>
13 #include <linux/gfp.h>
14 #include <linux/bootmem.h>
15 #include <linux/proc_fs.h>
16 #include <linux/pagemap.h>
17 #include <linux/percpu.h>
18 #include <linux/io.h>
19 #include <linux/memblock.h>
20 #include <linux/dma-mapping.h>
21 #include <asm/mmu_context.h>
22 #include <asm/mmzone.h>
23 #include <asm/kexec.h>
24 #include <asm/tlb.h>
25 #include <asm/cacheflush.h>
26 #include <asm/sections.h>
27 #include <asm/setup.h>
28 #include <asm/cache.h>
29 #include <asm/sizes.h>
30
31 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
32 pgd_t swapper_pg_dir[PTRS_PER_PGD];
33
34 void __init generic_mem_init(void)
35 {
36 memblock_add(__MEMORY_START, __MEMORY_SIZE);
37 }
38
39 void __init __weak plat_mem_setup(void)
40 {
41 /* Nothing to see here, move along. */
42 }
43
44 #ifdef CONFIG_MMU
45 static pte_t *__get_pte_phys(unsigned long addr)
46 {
47 pgd_t *pgd;
48 pud_t *pud;
49 pmd_t *pmd;
50 pte_t *pte;
51
52 pgd = pgd_offset_k(addr);
53 if (pgd_none(*pgd)) {
54 pgd_ERROR(*pgd);
55 return NULL;
56 }
57
58 pud = pud_alloc(NULL, pgd, addr);
59 if (unlikely(!pud)) {
60 pud_ERROR(*pud);
61 return NULL;
62 }
63
64 pmd = pmd_alloc(NULL, pud, addr);
65 if (unlikely(!pmd)) {
66 pmd_ERROR(*pmd);
67 return NULL;
68 }
69
70 pte = pte_offset_kernel(pmd, addr);
71 return pte;
72 }
73
74 static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
75 {
76 pte_t *pte;
77
78 pte = __get_pte_phys(addr);
79 if (!pte_none(*pte)) {
80 pte_ERROR(*pte);
81 return;
82 }
83
84 set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot));
85 local_flush_tlb_one(get_asid(), addr);
86
87 if (pgprot_val(prot) & _PAGE_WIRED)
88 tlb_wire_entry(NULL, addr, *pte);
89 }
90
91 static void clear_pte_phys(unsigned long addr, pgprot_t prot)
92 {
93 pte_t *pte;
94
95 pte = __get_pte_phys(addr);
96
97 if (pgprot_val(prot) & _PAGE_WIRED)
98 tlb_unwire_entry();
99
100 set_pte(pte, pfn_pte(0, __pgprot(0)));
101 local_flush_tlb_one(get_asid(), addr);
102 }
103
104 void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
105 {
106 unsigned long address = __fix_to_virt(idx);
107
108 if (idx >= __end_of_fixed_addresses) {
109 BUG();
110 return;
111 }
112
113 set_pte_phys(address, phys, prot);
114 }
115
116 void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot)
117 {
118 unsigned long address = __fix_to_virt(idx);
119
120 if (idx >= __end_of_fixed_addresses) {
121 BUG();
122 return;
123 }
124
125 clear_pte_phys(address, prot);
126 }
127
128 void __init page_table_range_init(unsigned long start, unsigned long end,
129 pgd_t *pgd_base)
130 {
131 pgd_t *pgd;
132 pud_t *pud;
133 pmd_t *pmd;
134 pte_t *pte;
135 int i, j, k;
136 unsigned long vaddr;
137
138 vaddr = start;
139 i = __pgd_offset(vaddr);
140 j = __pud_offset(vaddr);
141 k = __pmd_offset(vaddr);
142 pgd = pgd_base + i;
143
144 for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
145 pud = (pud_t *)pgd;
146 for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
147 #ifdef __PAGETABLE_PMD_FOLDED
148 pmd = (pmd_t *)pud;
149 #else
150 pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
151 pud_populate(&init_mm, pud, pmd);
152 pmd += k;
153 #endif
154 for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
155 if (pmd_none(*pmd)) {
156 pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
157 pmd_populate_kernel(&init_mm, pmd, pte);
158 BUG_ON(pte != pte_offset_kernel(pmd, 0));
159 }
160 vaddr += PMD_SIZE;
161 }
162 k = 0;
163 }
164 j = 0;
165 }
166 }
167 #endif /* CONFIG_MMU */
168
169 void __init allocate_pgdat(unsigned int nid)
170 {
171 unsigned long start_pfn, end_pfn;
172 #ifdef CONFIG_NEED_MULTIPLE_NODES
173 unsigned long phys;
174 #endif
175
176 get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
177
178 #ifdef CONFIG_NEED_MULTIPLE_NODES
179 phys = __memblock_alloc_base(sizeof(struct pglist_data),
180 SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT);
181 /* Retry with all of system memory */
182 if (!phys)
183 phys = __memblock_alloc_base(sizeof(struct pglist_data),
184 SMP_CACHE_BYTES, memblock_end_of_DRAM());
185 if (!phys)
186 panic("Can't allocate pgdat for node %d\n", nid);
187
188 NODE_DATA(nid) = __va(phys);
189 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
190
191 NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
192 #endif
193
194 NODE_DATA(nid)->node_start_pfn = start_pfn;
195 NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn;
196 }
197
198 static void __init bootmem_init_one_node(unsigned int nid)
199 {
200 unsigned long total_pages, paddr;
201 unsigned long end_pfn;
202 struct pglist_data *p;
203 int i;
204
205 p = NODE_DATA(nid);
206
207 /* Nothing to do.. */
208 if (!p->node_spanned_pages)
209 return;
210
211 end_pfn = p->node_start_pfn + p->node_spanned_pages;
212
213 total_pages = bootmem_bootmap_pages(p->node_spanned_pages);
214
215 paddr = memblock_alloc(total_pages << PAGE_SHIFT, PAGE_SIZE);
216 if (!paddr)
217 panic("Can't allocate bootmap for nid[%d]\n", nid);
218
219 init_bootmem_node(p, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn);
220
221 free_bootmem_with_active_regions(nid, end_pfn);
222
223 /*
224 * XXX Handle initial reservations for the system memory node
225 * only for the moment, we'll refactor this later for handling
226 * reservations in other nodes.
227 */
228 if (nid == 0) {
229 /* Reserve the sections we're already using. */
230 for (i = 0; i < memblock.reserved.cnt; i++)
231 reserve_bootmem(memblock.reserved.region[i].base,
232 memblock_size_bytes(&memblock.reserved, i),
233 BOOTMEM_DEFAULT);
234 }
235
236 sparse_memory_present_with_active_regions(nid);
237 }
238
239 static void __init do_init_bootmem(void)
240 {
241 int i;
242
243 /* Add active regions with valid PFNs. */
244 for (i = 0; i < memblock.memory.cnt; i++) {
245 unsigned long start_pfn, end_pfn;
246 start_pfn = memblock.memory.region[i].base >> PAGE_SHIFT;
247 end_pfn = start_pfn + memblock_size_pages(&memblock.memory, i);
248 __add_active_range(0, start_pfn, end_pfn);
249 }
250
251 /* All of system RAM sits in node 0 for the non-NUMA case */
252 allocate_pgdat(0);
253 node_set_online(0);
254
255 plat_mem_setup();
256
257 for_each_online_node(i)
258 bootmem_init_one_node(i);
259
260 sparse_init();
261 }
262
263 static void __init early_reserve_mem(void)
264 {
265 unsigned long start_pfn;
266
267 /*
268 * Partially used pages are not usable - thus
269 * we are rounding upwards:
270 */
271 start_pfn = PFN_UP(__pa(_end));
272
273 /*
274 * Reserve the kernel text and Reserve the bootmem bitmap. We do
275 * this in two steps (first step was init_bootmem()), because
276 * this catches the (definitely buggy) case of us accidentally
277 * initializing the bootmem allocator with an invalid RAM area.
278 */
279 memblock_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
280 (PFN_PHYS(start_pfn) + PAGE_SIZE - 1) -
281 (__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET));
282
283 /*
284 * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
285 */
286 if (CONFIG_ZERO_PAGE_OFFSET != 0)
287 memblock_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
288
289 /*
290 * Handle additional early reservations
291 */
292 check_for_initrd();
293 reserve_crashkernel();
294 }
295
296 void __init paging_init(void)
297 {
298 unsigned long max_zone_pfns[MAX_NR_ZONES];
299 unsigned long vaddr, end;
300 int nid;
301
302 memblock_init();
303
304 sh_mv.mv_mem_init();
305
306 early_reserve_mem();
307
308 memblock_enforce_memory_limit(memory_limit);
309 memblock_analyze();
310
311 memblock_dump_all();
312
313 /*
314 * Determine low and high memory ranges:
315 */
316 max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT;
317 min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
318
319 nodes_clear(node_online_map);
320
321 memory_start = (unsigned long)__va(__MEMORY_START);
322 memory_end = memory_start + (memory_limit ?: memblock_phys_mem_size());
323
324 uncached_init();
325 pmb_init();
326 do_init_bootmem();
327 ioremap_fixed_init();
328
329 /* We don't need to map the kernel through the TLB, as
330 * it is permanatly mapped using P1. So clear the
331 * entire pgd. */
332 memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));
333
334 /* Set an initial value for the MMU.TTB so we don't have to
335 * check for a null value. */
336 set_TTB(swapper_pg_dir);
337
338 /*
339 * Populate the relevant portions of swapper_pg_dir so that
340 * we can use the fixmap entries without calling kmalloc.
341 * pte's will be filled in by __set_fixmap().
342 */
343 vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
344 end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
345 page_table_range_init(vaddr, end, swapper_pg_dir);
346
347 kmap_coherent_init();
348
349 memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
350
351 for_each_online_node(nid) {
352 pg_data_t *pgdat = NODE_DATA(nid);
353 unsigned long low, start_pfn;
354
355 start_pfn = pgdat->bdata->node_min_pfn;
356 low = pgdat->bdata->node_low_pfn;
357
358 if (max_zone_pfns[ZONE_NORMAL] < low)
359 max_zone_pfns[ZONE_NORMAL] = low;
360
361 printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n",
362 nid, start_pfn, low);
363 }
364
365 free_area_init_nodes(max_zone_pfns);
366 }
367
368 /*
369 * Early initialization for any I/O MMUs we might have.
370 */
371 static void __init iommu_init(void)
372 {
373 no_iommu_init();
374 }
375
376 unsigned int mem_init_done = 0;
377
378 void __init mem_init(void)
379 {
380 int codesize, datasize, initsize;
381 int nid;
382
383 iommu_init();
384
385 num_physpages = 0;
386 high_memory = NULL;
387
388 for_each_online_node(nid) {
389 pg_data_t *pgdat = NODE_DATA(nid);
390 unsigned long node_pages = 0;
391 void *node_high_memory;
392
393 num_physpages += pgdat->node_present_pages;
394
395 if (pgdat->node_spanned_pages)
396 node_pages = free_all_bootmem_node(pgdat);
397
398 totalram_pages += node_pages;
399
400 node_high_memory = (void *)__va((pgdat->node_start_pfn +
401 pgdat->node_spanned_pages) <<
402 PAGE_SHIFT);
403 if (node_high_memory > high_memory)
404 high_memory = node_high_memory;
405 }
406
407 /* Set this up early, so we can take care of the zero page */
408 cpu_cache_init();
409
410 /* clear the zero-page */
411 memset(empty_zero_page, 0, PAGE_SIZE);
412 __flush_wback_region(empty_zero_page, PAGE_SIZE);
413
414 vsyscall_init();
415
416 codesize = (unsigned long) &_etext - (unsigned long) &_text;
417 datasize = (unsigned long) &_edata - (unsigned long) &_etext;
418 initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
419
420 printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
421 "%dk data, %dk init)\n",
422 nr_free_pages() << (PAGE_SHIFT-10),
423 num_physpages << (PAGE_SHIFT-10),
424 codesize >> 10,
425 datasize >> 10,
426 initsize >> 10);
427
428 printk(KERN_INFO "virtual kernel memory layout:\n"
429 " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
430 #ifdef CONFIG_HIGHMEM
431 " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
432 #endif
433 " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
434 " lowmem : 0x%08lx - 0x%08lx (%4ld MB) (cached)\n"
435 #ifdef CONFIG_UNCACHED_MAPPING
436 " : 0x%08lx - 0x%08lx (%4ld MB) (uncached)\n"
437 #endif
438 " .init : 0x%08lx - 0x%08lx (%4ld kB)\n"
439 " .data : 0x%08lx - 0x%08lx (%4ld kB)\n"
440 " .text : 0x%08lx - 0x%08lx (%4ld kB)\n",
441 FIXADDR_START, FIXADDR_TOP,
442 (FIXADDR_TOP - FIXADDR_START) >> 10,
443
444 #ifdef CONFIG_HIGHMEM
445 PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
446 (LAST_PKMAP*PAGE_SIZE) >> 10,
447 #endif
448
449 (unsigned long)VMALLOC_START, VMALLOC_END,
450 (VMALLOC_END - VMALLOC_START) >> 20,
451
452 (unsigned long)memory_start, (unsigned long)high_memory,
453 ((unsigned long)high_memory - (unsigned long)memory_start) >> 20,
454
455 #ifdef CONFIG_UNCACHED_MAPPING
456 uncached_start, uncached_end, uncached_size >> 20,
457 #endif
458
459 (unsigned long)&__init_begin, (unsigned long)&__init_end,
460 ((unsigned long)&__init_end -
461 (unsigned long)&__init_begin) >> 10,
462
463 (unsigned long)&_etext, (unsigned long)&_edata,
464 ((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
465
466 (unsigned long)&_text, (unsigned long)&_etext,
467 ((unsigned long)&_etext - (unsigned long)&_text) >> 10);
468
469 mem_init_done = 1;
470 }
471
472 void free_initmem(void)
473 {
474 unsigned long addr;
475
476 addr = (unsigned long)(&__init_begin);
477 for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
478 ClearPageReserved(virt_to_page(addr));
479 init_page_count(virt_to_page(addr));
480 free_page(addr);
481 totalram_pages++;
482 }
483 printk("Freeing unused kernel memory: %ldk freed\n",
484 ((unsigned long)&__init_end -
485 (unsigned long)&__init_begin) >> 10);
486 }
487
488 #ifdef CONFIG_BLK_DEV_INITRD
489 void free_initrd_mem(unsigned long start, unsigned long end)
490 {
491 unsigned long p;
492 for (p = start; p < end; p += PAGE_SIZE) {
493 ClearPageReserved(virt_to_page(p));
494 init_page_count(virt_to_page(p));
495 free_page(p);
496 totalram_pages++;
497 }
498 printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
499 }
500 #endif
501
502 #ifdef CONFIG_MEMORY_HOTPLUG
503 int arch_add_memory(int nid, u64 start, u64 size)
504 {
505 pg_data_t *pgdat;
506 unsigned long start_pfn = start >> PAGE_SHIFT;
507 unsigned long nr_pages = size >> PAGE_SHIFT;
508 int ret;
509
510 pgdat = NODE_DATA(nid);
511
512 /* We only have ZONE_NORMAL, so this is easy.. */
513 ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL,
514 start_pfn, nr_pages);
515 if (unlikely(ret))
516 printk("%s: Failed, __add_pages() == %d\n", __func__, ret);
517
518 return ret;
519 }
520 EXPORT_SYMBOL_GPL(arch_add_memory);
521
522 #ifdef CONFIG_NUMA
523 int memory_add_physaddr_to_nid(u64 addr)
524 {
525 /* Node 0 for now.. */
526 return 0;
527 }
528 EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
529 #endif
530
531 #endif /* CONFIG_MEMORY_HOTPLUG */
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