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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / arch / sh / kernel / setup.c
blobe769401a78ba3218946620d62ad2a83875448ea7
1 /*
2 * arch/sh/kernel/setup.c
3 *
4 * This file handles the architecture-dependent parts of initialization
5 *
6 * Copyright (C) 1999 Niibe Yutaka
7 * Copyright (C) 2002 - 2010 Paul Mundt
8 */
9 #include <linux/screen_info.h>
10 #include <linux/ioport.h>
11 #include <linux/init.h>
12 #include <linux/initrd.h>
13 #include <linux/bootmem.h>
14 #include <linux/console.h>
15 #include <linux/seq_file.h>
16 #include <linux/root_dev.h>
17 #include <linux/utsname.h>
18 #include <linux/nodemask.h>
19 #include <linux/cpu.h>
20 #include <linux/pfn.h>
21 #include <linux/fs.h>
22 #include <linux/mm.h>
23 #include <linux/kexec.h>
24 #include <linux/module.h>
25 #include <linux/smp.h>
26 #include <linux/err.h>
27 #include <linux/debugfs.h>
28 #include <linux/crash_dump.h>
29 #include <linux/mmzone.h>
30 #include <linux/clk.h>
31 #include <linux/delay.h>
32 #include <linux/platform_device.h>
33 #include <linux/memblock.h>
34 #include <asm/uaccess.h>
35 #include <asm/io.h>
36 #include <asm/page.h>
37 #include <asm/elf.h>
38 #include <asm/sections.h>
39 #include <asm/irq.h>
40 #include <asm/setup.h>
41 #include <asm/clock.h>
42 #include <asm/smp.h>
43 #include <asm/mmu_context.h>
44 #include <asm/mmzone.h>
45
46 /*
47 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
48 * This value will be used at the very early stage of serial setup.
49 * The bigger value means no problem.
50 */
51 struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
52 [0] = {
53 .type = CPU_SH_NONE,
54 .family = CPU_FAMILY_UNKNOWN,
55 .loops_per_jiffy = 10000000,
56 },
57 };
58 EXPORT_SYMBOL(cpu_data);
59
60 /*
61 * The machine vector. First entry in .machvec.init, or clobbered by
62 * sh_mv= on the command line, prior to .machvec.init teardown.
63 */
64 struct sh_machine_vector sh_mv = { .mv_name = "generic", };
65 EXPORT_SYMBOL(sh_mv);
66
67 #ifdef CONFIG_VT
68 struct screen_info screen_info;
69 #endif
70
71 extern int root_mountflags;
72
73 #define RAMDISK_IMAGE_START_MASK 0x07FF
74 #define RAMDISK_PROMPT_FLAG 0x8000
75 #define RAMDISK_LOAD_FLAG 0x4000
76
77 static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
78
79 static struct resource code_resource = {
80 .name = "Kernel code",
81 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
82 };
83
84 static struct resource data_resource = {
85 .name = "Kernel data",
86 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
87 };
88
89 static struct resource bss_resource = {
90 .name = "Kernel bss",
91 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
92 };
93
94 unsigned long memory_start;
95 EXPORT_SYMBOL(memory_start);
96 unsigned long memory_end = 0;
97 EXPORT_SYMBOL(memory_end);
98 unsigned long memory_limit = 0;
99
100 static struct resource mem_resources[MAX_NUMNODES];
101
102 int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
103
104 static int __init early_parse_mem(char *p)
105 {
106 if (!p)
107 return 1;
108
109 memory_limit = PAGE_ALIGN(memparse(p, &p));
110
111 pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
112
113 return 0;
114 }
115 early_param("mem", early_parse_mem);
116
117 void __init check_for_initrd(void)
118 {
119 #ifdef CONFIG_BLK_DEV_INITRD
120 unsigned long start, end;
121
122 /*
123 * Check for the rare cases where boot loaders adhere to the boot
124 * ABI.
125 */
126 if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
127 goto disable;
128
129 start = INITRD_START + __MEMORY_START;
130 end = start + INITRD_SIZE;
131
132 if (unlikely(end <= start))
133 goto disable;
134 if (unlikely(start & ~PAGE_MASK)) {
135 pr_err("initrd must be page aligned\n");
136 goto disable;
137 }
138
139 if (unlikely(start < PAGE_OFFSET)) {
140 pr_err("initrd start < PAGE_OFFSET\n");
141 goto disable;
142 }
143
144 if (unlikely(end > memblock_end_of_DRAM())) {
145 pr_err("initrd extends beyond end of memory "
146 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
147 end, (unsigned long)memblock_end_of_DRAM());
148 goto disable;
149 }
150
151 /*
152 * If we got this far inspite of the boot loader's best efforts
153 * to the contrary, assume we actually have a valid initrd and
154 * fix up the root dev.
155 */
156 ROOT_DEV = Root_RAM0;
157
158 /*
159 * Address sanitization
160 */
161 initrd_start = (unsigned long)__va(__pa(start));
162 initrd_end = initrd_start + INITRD_SIZE;
163
164 memblock_reserve(__pa(initrd_start), INITRD_SIZE);
165
166 return;
167
168 disable:
169 pr_info("initrd disabled\n");
170 initrd_start = initrd_end = 0;
171 #endif
172 }
173
174 void __cpuinit calibrate_delay(void)
175 {
176 struct clk *clk = clk_get(NULL, "cpu_clk");
177
178 if (IS_ERR(clk))
179 panic("Need a sane CPU clock definition!");
180
181 loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
182
183 printk(KERN_INFO "Calibrating delay loop (skipped)... "
184 "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
185 loops_per_jiffy/(500000/HZ),
186 (loops_per_jiffy/(5000/HZ)) % 100,
187 loops_per_jiffy);
188 }
189
190 void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
191 unsigned long end_pfn)
192 {
193 struct resource *res = &mem_resources[nid];
194 unsigned long start, end;
195
196 WARN_ON(res->name); /* max one active range per node for now */
197
198 start = start_pfn << PAGE_SHIFT;
199 end = end_pfn << PAGE_SHIFT;
200
201 res->name = "System RAM";
202 res->start = start;
203 res->end = end - 1;
204 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
205
206 if (request_resource(&iomem_resource, res)) {
207 pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
208 start_pfn, end_pfn);
209 return;
210 }
211
212 /*
213 * We don't know which RAM region contains kernel data,
214 * so we try it repeatedly and let the resource manager
215 * test it.
216 */
217 request_resource(res, &code_resource);
218 request_resource(res, &data_resource);
219 request_resource(res, &bss_resource);
220
221 /*
222 * Also make sure that there is a PMB mapping that covers this
223 * range before we attempt to activate it, to avoid reset by MMU.
224 * We can hit this path with NUMA or memory hot-add.
225 */
226 pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
227 PAGE_KERNEL);
228
229 add_active_range(nid, start_pfn, end_pfn);
230 }
231
232 void __init __weak plat_early_device_setup(void)
233 {
234 }
235
236 void __init setup_arch(char **cmdline_p)
237 {
238 enable_mmu();
239
240 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
241
242 printk(KERN_NOTICE "Boot params:\n"
243 "... MOUNT_ROOT_RDONLY - %08lx\n"
244 "... RAMDISK_FLAGS - %08lx\n"
245 "... ORIG_ROOT_DEV - %08lx\n"
246 "... LOADER_TYPE - %08lx\n"
247 "... INITRD_START - %08lx\n"
248 "... INITRD_SIZE - %08lx\n",
249 MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
250 ORIG_ROOT_DEV, LOADER_TYPE,
251 INITRD_START, INITRD_SIZE);
252
253 #ifdef CONFIG_BLK_DEV_RAM
254 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
255 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
256 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
257 #endif
258
259 if (!MOUNT_ROOT_RDONLY)
260 root_mountflags &= ~MS_RDONLY;
261 init_mm.start_code = (unsigned long) _text;
262 init_mm.end_code = (unsigned long) _etext;
263 init_mm.end_data = (unsigned long) _edata;
264 init_mm.brk = (unsigned long) _end;
265
266 code_resource.start = virt_to_phys(_text);
267 code_resource.end = virt_to_phys(_etext)-1;
268 data_resource.start = virt_to_phys(_etext);
269 data_resource.end = virt_to_phys(_edata)-1;
270 bss_resource.start = virt_to_phys(__bss_start);
271 bss_resource.end = virt_to_phys(_ebss)-1;
272
273 #ifdef CONFIG_CMDLINE_OVERWRITE
274 strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
275 #else
276 strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
277 #ifdef CONFIG_CMDLINE_EXTEND
278 strlcat(command_line, " ", sizeof(command_line));
279 strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
280 #endif
281 #endif
282
283 /* Save unparsed command line copy for /proc/cmdline */
284 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
285 *cmdline_p = command_line;
286
287 parse_early_param();
288
289 plat_early_device_setup();
290
291 sh_mv_setup();
292
293 /* Let earlyprintk output early console messages */
294 early_platform_driver_probe("earlyprintk", 1, 1);
295
296 paging_init();
297
298 #ifdef CONFIG_DUMMY_CONSOLE
299 conswitchp = &dummy_con;
300 #endif
301
302 /* Perform the machine specific initialisation */
303 if (likely(sh_mv.mv_setup))
304 sh_mv.mv_setup(cmdline_p);
305
306 plat_smp_setup();
307 }
308
309 /* processor boot mode configuration */
310 int generic_mode_pins(void)
311 {
312 pr_warning("generic_mode_pins(): missing mode pin configuration\n");
313 return 0;
314 }
315
316 int test_mode_pin(int pin)
317 {
318 return sh_mv.mv_mode_pins() & pin;
319 }
320
321 static const char *cpu_name[] = {
322 [CPU_SH7201] = "SH7201",
323 [CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263",
324 [CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619",
325 [CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706",
326 [CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708",
327 [CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710",
328 [CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720",
329 [CPU_SH7721] = "SH7721", [CPU_SH7729] = "SH7729",
330 [CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S",
331 [CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751",
332 [CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760",
333 [CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501",
334 [CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770",
335 [CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781",
336 [CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785",
337 [CPU_SH7786] = "SH7786", [CPU_SH7757] = "SH7757",
338 [CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3",
339 [CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103",
340 [CPU_MXG] = "MX-G", [CPU_SH7723] = "SH7723",
341 [CPU_SH7366] = "SH7366", [CPU_SH7724] = "SH7724",
342 [CPU_SH_NONE] = "Unknown"
343 };
344
345 const char *get_cpu_subtype(struct sh_cpuinfo *c)
346 {
347 return cpu_name[c->type];
348 }
349 EXPORT_SYMBOL(get_cpu_subtype);
350
351 #ifdef CONFIG_PROC_FS
352 /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
353 static const char *cpu_flags[] = {
354 "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
355 "ptea", "llsc", "l2", "op32", "pteaex", NULL
356 };
357
358 static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c)
359 {
360 unsigned long i;
361
362 seq_printf(m, "cpu flags\t:");
363
364 if (!c->flags) {
365 seq_printf(m, " %s\n", cpu_flags[0]);
366 return;
367 }
368
369 for (i = 0; cpu_flags[i]; i++)
370 if ((c->flags & (1 << i)))
371 seq_printf(m, " %s", cpu_flags[i+1]);
372
373 seq_printf(m, "\n");
374 }
375
376 static void show_cacheinfo(struct seq_file *m, const char *type,
377 struct cache_info info)
378 {
379 unsigned int cache_size;
380
381 cache_size = info.ways * info.sets * info.linesz;
382
383 seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
384 type, cache_size >> 10, info.ways);
385 }
386
387 /*
388 * Get CPU information for use by the procfs.
389 */
390 static int show_cpuinfo(struct seq_file *m, void *v)
391 {
392 struct sh_cpuinfo *c = v;
393 unsigned int cpu = c - cpu_data;
394
395 if (!cpu_online(cpu))
396 return 0;
397
398 if (cpu == 0)
399 seq_printf(m, "machine\t\t: %s\n", get_system_type());
400 else
401 seq_printf(m, "\n");
402
403 seq_printf(m, "processor\t: %d\n", cpu);
404 seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
405 seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
406 if (c->cut_major == -1)
407 seq_printf(m, "cut\t\t: unknown\n");
408 else if (c->cut_minor == -1)
409 seq_printf(m, "cut\t\t: %d.x\n", c->cut_major);
410 else
411 seq_printf(m, "cut\t\t: %d.%d\n", c->cut_major, c->cut_minor);
412
413 show_cpuflags(m, c);
414
415 seq_printf(m, "cache type\t: ");
416
417 /*
418 * Check for what type of cache we have, we support both the
419 * unified cache on the SH-2 and SH-3, as well as the harvard
420 * style cache on the SH-4.
421 */
422 if (c->icache.flags & SH_CACHE_COMBINED) {
423 seq_printf(m, "unified\n");
424 show_cacheinfo(m, "cache", c->icache);
425 } else {
426 seq_printf(m, "split (harvard)\n");
427 show_cacheinfo(m, "icache", c->icache);
428 show_cacheinfo(m, "dcache", c->dcache);
429 }
430
431 /* Optional secondary cache */
432 if (c->flags & CPU_HAS_L2_CACHE)
433 show_cacheinfo(m, "scache", c->scache);
434
435 seq_printf(m, "bogomips\t: %lu.%02lu\n",
436 c->loops_per_jiffy/(500000/HZ),
437 (c->loops_per_jiffy/(5000/HZ)) % 100);
438
439 return 0;
440 }
441
442 static void *c_start(struct seq_file *m, loff_t *pos)
443 {
444 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
445 }
446 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
447 {
448 ++*pos;
449 return c_start(m, pos);
450 }
451 static void c_stop(struct seq_file *m, void *v)
452 {
453 }
454 const struct seq_operations cpuinfo_op = {
455 .start = c_start,
456 .next = c_next,
457 .stop = c_stop,
458 .show = show_cpuinfo,
459 };
460 #endif /* CONFIG_PROC_FS */
461
462 struct dentry *sh_debugfs_root;
463
464 static int __init sh_debugfs_init(void)
465 {
466 sh_debugfs_root = debugfs_create_dir("sh", NULL);
467 if (!sh_debugfs_root)
468 return -ENOMEM;
469 if (IS_ERR(sh_debugfs_root))
470 return PTR_ERR(sh_debugfs_root);
471
472 return 0;
473 }
474 arch_initcall(sh_debugfs_init);
Tomato firmware and modifications.