Commit | Line | Data |
---|---|---|
711fa809 | 1 | /* |
11c19656 | 2 | * arch/sh/kernel/setup.c |
1da177e4 | 3 | * |
1da177e4 | 4 | * This file handles the architecture-dependent parts of initialization |
11c19656 PM |
5 | * |
6 | * Copyright (C) 1999 Niibe Yutaka | |
01066625 | 7 | * Copyright (C) 2002 - 2007 Paul Mundt |
1da177e4 | 8 | */ |
894673ee | 9 | #include <linux/screen_info.h> |
1da177e4 LT |
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> | |
01066625 | 18 | #include <linux/nodemask.h> |
1da177e4 | 19 | #include <linux/cpu.h> |
22a9835c | 20 | #include <linux/pfn.h> |
711fa809 | 21 | #include <linux/fs.h> |
01066625 | 22 | #include <linux/mm.h> |
4d5ade5b | 23 | #include <linux/kexec.h> |
98d877c4 | 24 | #include <linux/module.h> |
0016a126 | 25 | #include <linux/smp.h> |
1da177e4 LT |
26 | #include <asm/uaccess.h> |
27 | #include <asm/io.h> | |
7a302a96 | 28 | #include <asm/page.h> |
1da177e4 LT |
29 | #include <asm/sections.h> |
30 | #include <asm/irq.h> | |
31 | #include <asm/setup.h> | |
de02797a | 32 | #include <asm/clock.h> |
01066625 | 33 | #include <asm/mmu_context.h> |
1da177e4 | 34 | |
1da177e4 LT |
35 | /* |
36 | * Initialize loops_per_jiffy as 10000000 (1000MIPS). | |
37 | * This value will be used at the very early stage of serial setup. | |
38 | * The bigger value means no problem. | |
39 | */ | |
2d4a73d5 PM |
40 | struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = { |
41 | [0] = { | |
42 | .type = CPU_SH_NONE, | |
43 | .loops_per_jiffy = 10000000, | |
44 | }, | |
45 | }; | |
46 | EXPORT_SYMBOL(cpu_data); | |
82f81f47 PM |
47 | |
48 | /* | |
49 | * The machine vector. First entry in .machvec.init, or clobbered by | |
50 | * sh_mv= on the command line, prior to .machvec.init teardown. | |
51 | */ | |
fd8f20e8 | 52 | struct sh_machine_vector sh_mv = { .mv_name = "generic", }; |
82f81f47 | 53 | |
2c7834a6 | 54 | #ifdef CONFIG_VT |
1da177e4 | 55 | struct screen_info screen_info; |
2c7834a6 | 56 | #endif |
1da177e4 | 57 | |
1da177e4 LT |
58 | extern int root_mountflags; |
59 | ||
65463b73 | 60 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 61 | #define RAMDISK_PROMPT_FLAG 0x8000 |
65463b73 | 62 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 63 | |
53c82622 | 64 | static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, }; |
1da177e4 | 65 | |
69d1ef4c PM |
66 | static struct resource code_resource = { |
67 | .name = "Kernel code", | |
68 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
69 | }; | |
70 | ||
71 | static struct resource data_resource = { | |
72 | .name = "Kernel data", | |
73 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
74 | }; | |
1da177e4 | 75 | |
98d877c4 PM |
76 | unsigned long memory_start; |
77 | EXPORT_SYMBOL(memory_start); | |
7e5186ea | 78 | unsigned long memory_end = 0; |
98d877c4 | 79 | EXPORT_SYMBOL(memory_end); |
1da177e4 | 80 | |
9655ad03 | 81 | static int __init early_parse_mem(char *p) |
1da177e4 | 82 | { |
9655ad03 | 83 | unsigned long size; |
1da177e4 LT |
84 | |
85 | memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START; | |
9655ad03 PM |
86 | size = memparse(p, &p); |
87 | memory_end = memory_start + size; | |
2c7834a6 | 88 | |
1da177e4 LT |
89 | return 0; |
90 | } | |
9655ad03 | 91 | early_param("mem", early_parse_mem); |
1da177e4 | 92 | |
01066625 PM |
93 | /* |
94 | * Register fully available low RAM pages with the bootmem allocator. | |
95 | */ | |
96 | static void __init register_bootmem_low_pages(void) | |
1da177e4 | 97 | { |
01066625 | 98 | unsigned long curr_pfn, last_pfn, pages; |
b641fe01 | 99 | |
1da177e4 | 100 | /* |
01066625 | 101 | * We are rounding up the start address of usable memory: |
1da177e4 | 102 | */ |
01066625 | 103 | curr_pfn = PFN_UP(__MEMORY_START); |
1da177e4 LT |
104 | |
105 | /* | |
01066625 | 106 | * ... and at the end of the usable range downwards: |
1da177e4 | 107 | */ |
01066625 | 108 | last_pfn = PFN_DOWN(__pa(memory_end)); |
1da177e4 | 109 | |
01066625 PM |
110 | if (last_pfn > max_low_pfn) |
111 | last_pfn = max_low_pfn; | |
112 | ||
113 | pages = last_pfn - curr_pfn; | |
114 | free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages)); | |
115 | } | |
116 | ||
7d7712a3 BW |
117 | #ifdef CONFIG_KEXEC |
118 | static void __init reserve_crashkernel(void) | |
119 | { | |
120 | unsigned long long free_mem; | |
121 | unsigned long long crash_size, crash_base; | |
122 | int ret; | |
123 | ||
124 | free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT; | |
125 | ||
126 | ret = parse_crashkernel(boot_command_line, free_mem, | |
127 | &crash_size, &crash_base); | |
128 | if (ret == 0 && crash_size) { | |
129 | if (crash_base > 0) { | |
130 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " | |
131 | "for crashkernel (System RAM: %ldMB)\n", | |
132 | (unsigned long)(crash_size >> 20), | |
133 | (unsigned long)(crash_base >> 20), | |
134 | (unsigned long)(free_mem >> 20)); | |
135 | crashk_res.start = crash_base; | |
136 | crashk_res.end = crash_base + crash_size - 1; | |
137 | reserve_bootmem(crash_base, crash_size); | |
138 | } else | |
139 | printk(KERN_INFO "crashkernel reservation failed - " | |
140 | "you have to specify a base address\n"); | |
141 | } | |
142 | } | |
143 | #else | |
144 | static inline void __init reserve_crashkernel(void) | |
145 | {} | |
146 | #endif | |
147 | ||
2826fa61 | 148 | void __init setup_bootmem_allocator(unsigned long free_pfn) |
01066625 PM |
149 | { |
150 | unsigned long bootmap_size; | |
1da177e4 LT |
151 | |
152 | /* | |
153 | * Find a proper area for the bootmem bitmap. After this | |
154 | * bootstrap step all allocations (until the page allocator | |
155 | * is intact) must be done via bootmem_alloc(). | |
156 | */ | |
2826fa61 | 157 | bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn, |
01066625 | 158 | min_low_pfn, max_low_pfn); |
1da177e4 | 159 | |
dfbb9042 | 160 | add_active_range(0, min_low_pfn, max_low_pfn); |
01066625 | 161 | register_bootmem_low_pages(); |
1da177e4 | 162 | |
01066625 | 163 | node_set_online(0); |
b641fe01 | 164 | |
1da177e4 LT |
165 | /* |
166 | * Reserve the kernel text and | |
167 | * Reserve the bootmem bitmap. We do this in two steps (first step | |
168 | * was init_bootmem()), because this catches the (definitely buggy) | |
169 | * case of us accidentally initializing the bootmem allocator with | |
170 | * an invalid RAM area. | |
171 | */ | |
01066625 | 172 | reserve_bootmem(__MEMORY_START+PAGE_SIZE, |
2826fa61 | 173 | (PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START); |
1da177e4 LT |
174 | |
175 | /* | |
176 | * reserve physical page 0 - it's a special BIOS page on many boxes, | |
177 | * enabling clean reboots, SMP operation, laptop functions. | |
178 | */ | |
01066625 | 179 | reserve_bootmem(__MEMORY_START, PAGE_SIZE); |
1da177e4 | 180 | |
2826fa61 PM |
181 | sparse_memory_present_with_active_regions(0); |
182 | ||
1da177e4 | 183 | #ifdef CONFIG_BLK_DEV_INITRD |
3f9654f0 | 184 | ROOT_DEV = Root_RAM0; |
1da177e4 LT |
185 | |
186 | if (LOADER_TYPE && INITRD_START) { | |
187 | if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { | |
01066625 PM |
188 | reserve_bootmem(INITRD_START + __MEMORY_START, |
189 | INITRD_SIZE); | |
41504c39 PM |
190 | initrd_start = INITRD_START + PAGE_OFFSET + |
191 | __MEMORY_START; | |
1da177e4 LT |
192 | initrd_end = initrd_start + INITRD_SIZE; |
193 | } else { | |
194 | printk("initrd extends beyond end of memory " | |
195 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
196 | INITRD_START + INITRD_SIZE, | |
197 | max_low_pfn << PAGE_SHIFT); | |
198 | initrd_start = 0; | |
199 | } | |
200 | } | |
201 | #endif | |
7d7712a3 BW |
202 | |
203 | reserve_crashkernel(); | |
01066625 PM |
204 | } |
205 | ||
206 | #ifndef CONFIG_NEED_MULTIPLE_NODES | |
207 | static void __init setup_memory(void) | |
208 | { | |
209 | unsigned long start_pfn; | |
210 | ||
211 | /* | |
212 | * Partially used pages are not usable - thus | |
213 | * we are rounding upwards: | |
214 | */ | |
215 | start_pfn = PFN_UP(__pa(_end)); | |
216 | setup_bootmem_allocator(start_pfn); | |
217 | } | |
218 | #else | |
219 | extern void __init setup_memory(void); | |
220 | #endif | |
221 | ||
222 | void __init setup_arch(char **cmdline_p) | |
223 | { | |
224 | enable_mmu(); | |
225 | ||
01066625 PM |
226 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); |
227 | ||
228 | #ifdef CONFIG_BLK_DEV_RAM | |
229 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
230 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | |
231 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | |
232 | #endif | |
233 | ||
234 | if (!MOUNT_ROOT_RDONLY) | |
235 | root_mountflags &= ~MS_RDONLY; | |
236 | init_mm.start_code = (unsigned long) _text; | |
237 | init_mm.end_code = (unsigned long) _etext; | |
238 | init_mm.end_data = (unsigned long) _edata; | |
239 | init_mm.brk = (unsigned long) _end; | |
240 | ||
241 | code_resource.start = virt_to_phys(_text); | |
242 | code_resource.end = virt_to_phys(_etext)-1; | |
243 | data_resource.start = virt_to_phys(_etext); | |
244 | data_resource.end = virt_to_phys(_edata)-1; | |
245 | ||
9655ad03 | 246 | memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START; |
7e5186ea PM |
247 | if (!memory_end) |
248 | memory_end = memory_start + __MEMORY_SIZE; | |
9655ad03 | 249 | |
ba36197c PM |
250 | #ifdef CONFIG_CMDLINE_BOOL |
251 | strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line)); | |
252 | #else | |
253 | strlcpy(command_line, COMMAND_LINE, sizeof(command_line)); | |
254 | #endif | |
9655ad03 | 255 | |
ba36197c PM |
256 | /* Save unparsed command line copy for /proc/cmdline */ |
257 | memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); | |
9655ad03 PM |
258 | *cmdline_p = command_line; |
259 | ||
01066625 PM |
260 | parse_early_param(); |
261 | ||
9655ad03 | 262 | sh_mv_setup(); |
01066625 PM |
263 | |
264 | /* | |
265 | * Find the highest page frame number we have available | |
266 | */ | |
267 | max_pfn = PFN_DOWN(__pa(memory_end)); | |
268 | ||
269 | /* | |
270 | * Determine low and high memory ranges: | |
271 | */ | |
272 | max_low_pfn = max_pfn; | |
273 | min_low_pfn = __MEMORY_START >> PAGE_SHIFT; | |
274 | ||
275 | nodes_clear(node_online_map); | |
dfbb9042 PM |
276 | |
277 | /* Setup bootmem with available RAM */ | |
01066625 | 278 | setup_memory(); |
01066625 | 279 | sparse_init(); |
1da177e4 LT |
280 | |
281 | #ifdef CONFIG_DUMMY_CONSOLE | |
282 | conswitchp = &dummy_con; | |
283 | #endif | |
284 | ||
285 | /* Perform the machine specific initialisation */ | |
2c7834a6 PM |
286 | if (likely(sh_mv.mv_setup)) |
287 | sh_mv.mv_setup(cmdline_p); | |
1da177e4 | 288 | |
dfbb9042 | 289 | paging_init(); |
0016a126 PM |
290 | |
291 | #ifdef CONFIG_SMP | |
292 | plat_smp_setup(); | |
293 | #endif | |
dfbb9042 | 294 | } |
1da177e4 | 295 | |
1da177e4 | 296 | static const char *cpu_name[] = { |
6d01f510 | 297 | [CPU_SH7203] = "SH7203", |
b552c7e8 | 298 | [CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619", |
e5723e0e PM |
299 | [CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706", |
300 | [CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708", | |
301 | [CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710", | |
3ea6bc3d | 302 | [CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720", |
e5723e0e PM |
303 | [CPU_SH7729] = "SH7729", [CPU_SH7750] = "SH7750", |
304 | [CPU_SH7750S] = "SH7750S", [CPU_SH7750R] = "SH7750R", | |
305 | [CPU_SH7751] = "SH7751", [CPU_SH7751R] = "SH7751R", | |
870e8a24 | 306 | [CPU_SH7760] = "SH7760", |
e5723e0e PM |
307 | [CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501", |
308 | [CPU_SH7770] = "SH7770", [CPU_SH7780] = "SH7780", | |
309 | [CPU_SH7781] = "SH7781", [CPU_SH7343] = "SH7343", | |
41504c39 | 310 | [CPU_SH7785] = "SH7785", [CPU_SH7722] = "SH7722", |
c2672f62 PM |
311 | [CPU_SHX3] = "SH-X3", |
312 | [CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103", | |
313 | [CPU_SH_NONE] = "Unknown" | |
1da177e4 LT |
314 | }; |
315 | ||
11c19656 | 316 | const char *get_cpu_subtype(struct sh_cpuinfo *c) |
1da177e4 | 317 | { |
11c19656 | 318 | return cpu_name[c->type]; |
1da177e4 LT |
319 | } |
320 | ||
321 | #ifdef CONFIG_PROC_FS | |
2220d164 | 322 | /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */ |
1da177e4 | 323 | static const char *cpu_flags[] = { |
2220d164 | 324 | "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr", |
074f98df | 325 | "ptea", "llsc", "l2", "op32", NULL |
1da177e4 LT |
326 | }; |
327 | ||
11c19656 | 328 | static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c) |
1da177e4 LT |
329 | { |
330 | unsigned long i; | |
331 | ||
332 | seq_printf(m, "cpu flags\t:"); | |
333 | ||
11c19656 | 334 | if (!c->flags) { |
1da177e4 LT |
335 | seq_printf(m, " %s\n", cpu_flags[0]); |
336 | return; | |
337 | } | |
338 | ||
de02797a | 339 | for (i = 0; cpu_flags[i]; i++) |
11c19656 | 340 | if ((c->flags & (1 << i))) |
1da177e4 LT |
341 | seq_printf(m, " %s", cpu_flags[i+1]); |
342 | ||
343 | seq_printf(m, "\n"); | |
344 | } | |
345 | ||
2c7834a6 PM |
346 | static void show_cacheinfo(struct seq_file *m, const char *type, |
347 | struct cache_info info) | |
1da177e4 LT |
348 | { |
349 | unsigned int cache_size; | |
350 | ||
351 | cache_size = info.ways * info.sets * info.linesz; | |
352 | ||
de02797a PM |
353 | seq_printf(m, "%s size\t: %2dKiB (%d-way)\n", |
354 | type, cache_size >> 10, info.ways); | |
1da177e4 LT |
355 | } |
356 | ||
357 | /* | |
358 | * Get CPU information for use by the procfs. | |
359 | */ | |
360 | static int show_cpuinfo(struct seq_file *m, void *v) | |
361 | { | |
11c19656 PM |
362 | struct sh_cpuinfo *c = v; |
363 | unsigned int cpu = c - cpu_data; | |
364 | ||
365 | if (!cpu_online(cpu)) | |
366 | return 0; | |
1da177e4 | 367 | |
11c19656 | 368 | if (cpu == 0) |
1da177e4 LT |
369 | seq_printf(m, "machine\t\t: %s\n", get_system_type()); |
370 | ||
371 | seq_printf(m, "processor\t: %d\n", cpu); | |
96b644bd | 372 | seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine); |
11c19656 | 373 | seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c)); |
1da177e4 | 374 | |
11c19656 | 375 | show_cpuflags(m, c); |
1da177e4 LT |
376 | |
377 | seq_printf(m, "cache type\t: "); | |
378 | ||
379 | /* | |
380 | * Check for what type of cache we have, we support both the | |
381 | * unified cache on the SH-2 and SH-3, as well as the harvard | |
382 | * style cache on the SH-4. | |
383 | */ | |
11c19656 | 384 | if (c->icache.flags & SH_CACHE_COMBINED) { |
1da177e4 | 385 | seq_printf(m, "unified\n"); |
11c19656 | 386 | show_cacheinfo(m, "cache", c->icache); |
1da177e4 LT |
387 | } else { |
388 | seq_printf(m, "split (harvard)\n"); | |
11c19656 PM |
389 | show_cacheinfo(m, "icache", c->icache); |
390 | show_cacheinfo(m, "dcache", c->dcache); | |
1da177e4 LT |
391 | } |
392 | ||
72c35543 | 393 | /* Optional secondary cache */ |
11c19656 PM |
394 | if (c->flags & CPU_HAS_L2_CACHE) |
395 | show_cacheinfo(m, "scache", c->scache); | |
72c35543 | 396 | |
1da177e4 | 397 | seq_printf(m, "bogomips\t: %lu.%02lu\n", |
11c19656 PM |
398 | c->loops_per_jiffy/(500000/HZ), |
399 | (c->loops_per_jiffy/(5000/HZ)) % 100); | |
1da177e4 | 400 | |
db62e5bd | 401 | return 0; |
1da177e4 LT |
402 | } |
403 | ||
1da177e4 LT |
404 | static void *c_start(struct seq_file *m, loff_t *pos) |
405 | { | |
406 | return *pos < NR_CPUS ? cpu_data + *pos : NULL; | |
407 | } | |
408 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
409 | { | |
410 | ++*pos; | |
411 | return c_start(m, pos); | |
412 | } | |
413 | static void c_stop(struct seq_file *m, void *v) | |
414 | { | |
415 | } | |
416 | struct seq_operations cpuinfo_op = { | |
417 | .start = c_start, | |
418 | .next = c_next, | |
419 | .stop = c_stop, | |
420 | .show = show_cpuinfo, | |
421 | }; | |
422 | #endif /* CONFIG_PROC_FS */ |