sh: Add support for SH7763 CPU subtype.
[deliverable/linux.git] / arch / sh / kernel / setup.c
CommitLineData
711fa809 1/*
11c19656 2 * arch/sh/kernel/setup.c
1da177e4 3 *
1da177e4 4 * This file handles the architecture-dependent parts of initialization
11c19656
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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>
cd01204b 29#include <asm/elf.h>
1da177e4
LT
30#include <asm/sections.h>
31#include <asm/irq.h>
32#include <asm/setup.h>
de02797a 33#include <asm/clock.h>
01066625 34#include <asm/mmu_context.h>
1da177e4 35
1da177e4
LT
36/*
37 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
38 * This value will be used at the very early stage of serial setup.
39 * The bigger value means no problem.
40 */
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41struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
42 [0] = {
43 .type = CPU_SH_NONE,
44 .loops_per_jiffy = 10000000,
45 },
46};
47EXPORT_SYMBOL(cpu_data);
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48
49/*
50 * The machine vector. First entry in .machvec.init, or clobbered by
51 * sh_mv= on the command line, prior to .machvec.init teardown.
52 */
fd8f20e8 53struct sh_machine_vector sh_mv = { .mv_name = "generic", };
82f81f47 54
2c7834a6 55#ifdef CONFIG_VT
1da177e4 56struct screen_info screen_info;
2c7834a6 57#endif
1da177e4 58
1da177e4
LT
59extern int root_mountflags;
60
65463b73 61#define RAMDISK_IMAGE_START_MASK 0x07FF
1da177e4 62#define RAMDISK_PROMPT_FLAG 0x8000
65463b73 63#define RAMDISK_LOAD_FLAG 0x4000
1da177e4 64
53c82622 65static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
1da177e4 66
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67static struct resource code_resource = {
68 .name = "Kernel code",
69 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
70};
71
72static struct resource data_resource = {
73 .name = "Kernel data",
74 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
75};
1da177e4 76
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77unsigned long memory_start;
78EXPORT_SYMBOL(memory_start);
7e5186ea 79unsigned long memory_end = 0;
98d877c4 80EXPORT_SYMBOL(memory_end);
1da177e4 81
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82int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
83
9655ad03 84static int __init early_parse_mem(char *p)
1da177e4 85{
9655ad03 86 unsigned long size;
1da177e4 87
d02b08f6 88 memory_start = (unsigned long)__va(__MEMORY_START);
9655ad03 89 size = memparse(p, &p);
80a68a43
SM
90
91 if (size > __MEMORY_SIZE) {
92 static char msg[] __initdata = KERN_ERR
93 "Using mem= to increase the size of kernel memory "
94 "is not allowed.\n"
95 " Recompile the kernel with the correct value for "
96 "CONFIG_MEMORY_SIZE.\n";
97 printk(msg);
98 return 0;
99 }
100
9655ad03 101 memory_end = memory_start + size;
2c7834a6 102
1da177e4
LT
103 return 0;
104}
9655ad03 105early_param("mem", early_parse_mem);
1da177e4 106
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107/*
108 * Register fully available low RAM pages with the bootmem allocator.
109 */
110static void __init register_bootmem_low_pages(void)
1da177e4 111{
01066625 112 unsigned long curr_pfn, last_pfn, pages;
b641fe01 113
1da177e4 114 /*
01066625 115 * We are rounding up the start address of usable memory:
1da177e4 116 */
01066625 117 curr_pfn = PFN_UP(__MEMORY_START);
1da177e4
LT
118
119 /*
01066625 120 * ... and at the end of the usable range downwards:
1da177e4 121 */
01066625 122 last_pfn = PFN_DOWN(__pa(memory_end));
1da177e4 123
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124 if (last_pfn > max_low_pfn)
125 last_pfn = max_low_pfn;
126
127 pages = last_pfn - curr_pfn;
128 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
129}
130
7d7712a3
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131#ifdef CONFIG_KEXEC
132static void __init reserve_crashkernel(void)
133{
134 unsigned long long free_mem;
135 unsigned long long crash_size, crash_base;
136 int ret;
137
138 free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
139
140 ret = parse_crashkernel(boot_command_line, free_mem,
141 &crash_size, &crash_base);
142 if (ret == 0 && crash_size) {
143 if (crash_base > 0) {
144 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
145 "for crashkernel (System RAM: %ldMB)\n",
146 (unsigned long)(crash_size >> 20),
147 (unsigned long)(crash_base >> 20),
148 (unsigned long)(free_mem >> 20));
149 crashk_res.start = crash_base;
150 crashk_res.end = crash_base + crash_size - 1;
151 reserve_bootmem(crash_base, crash_size);
152 } else
153 printk(KERN_INFO "crashkernel reservation failed - "
154 "you have to specify a base address\n");
155 }
156}
157#else
158static inline void __init reserve_crashkernel(void)
159{}
160#endif
161
2826fa61 162void __init setup_bootmem_allocator(unsigned long free_pfn)
01066625
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163{
164 unsigned long bootmap_size;
1da177e4
LT
165
166 /*
167 * Find a proper area for the bootmem bitmap. After this
168 * bootstrap step all allocations (until the page allocator
169 * is intact) must be done via bootmem_alloc().
170 */
2826fa61 171 bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
01066625 172 min_low_pfn, max_low_pfn);
1da177e4 173
dfbb9042 174 add_active_range(0, min_low_pfn, max_low_pfn);
01066625 175 register_bootmem_low_pages();
1da177e4 176
01066625 177 node_set_online(0);
b641fe01 178
1da177e4
LT
179 /*
180 * Reserve the kernel text and
181 * Reserve the bootmem bitmap. We do this in two steps (first step
182 * was init_bootmem()), because this catches the (definitely buggy)
183 * case of us accidentally initializing the bootmem allocator with
184 * an invalid RAM area.
185 */
01066625 186 reserve_bootmem(__MEMORY_START+PAGE_SIZE,
2826fa61 187 (PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);
1da177e4
LT
188
189 /*
190 * reserve physical page 0 - it's a special BIOS page on many boxes,
191 * enabling clean reboots, SMP operation, laptop functions.
192 */
01066625 193 reserve_bootmem(__MEMORY_START, PAGE_SIZE);
1da177e4 194
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195 sparse_memory_present_with_active_regions(0);
196
1da177e4 197#ifdef CONFIG_BLK_DEV_INITRD
3f9654f0 198 ROOT_DEV = Root_RAM0;
1da177e4
LT
199
200 if (LOADER_TYPE && INITRD_START) {
201 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
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202 reserve_bootmem(INITRD_START + __MEMORY_START,
203 INITRD_SIZE);
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204 initrd_start = INITRD_START + PAGE_OFFSET +
205 __MEMORY_START;
1da177e4
LT
206 initrd_end = initrd_start + INITRD_SIZE;
207 } else {
208 printk("initrd extends beyond end of memory "
209 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
210 INITRD_START + INITRD_SIZE,
211 max_low_pfn << PAGE_SHIFT);
212 initrd_start = 0;
213 }
214 }
215#endif
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216
217 reserve_crashkernel();
01066625
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218}
219
220#ifndef CONFIG_NEED_MULTIPLE_NODES
221static void __init setup_memory(void)
222{
223 unsigned long start_pfn;
224
225 /*
226 * Partially used pages are not usable - thus
227 * we are rounding upwards:
228 */
229 start_pfn = PFN_UP(__pa(_end));
230 setup_bootmem_allocator(start_pfn);
231}
232#else
233extern void __init setup_memory(void);
234#endif
235
236void __init setup_arch(char **cmdline_p)
237{
238 enable_mmu();
239
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240 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
241
242#ifdef CONFIG_BLK_DEV_RAM
243 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
244 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
245 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
246#endif
247
248 if (!MOUNT_ROOT_RDONLY)
249 root_mountflags &= ~MS_RDONLY;
250 init_mm.start_code = (unsigned long) _text;
251 init_mm.end_code = (unsigned long) _etext;
252 init_mm.end_data = (unsigned long) _edata;
253 init_mm.brk = (unsigned long) _end;
254
255 code_resource.start = virt_to_phys(_text);
256 code_resource.end = virt_to_phys(_etext)-1;
257 data_resource.start = virt_to_phys(_etext);
258 data_resource.end = virt_to_phys(_edata)-1;
259
d02b08f6 260 memory_start = (unsigned long)__va(__MEMORY_START);
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261 if (!memory_end)
262 memory_end = memory_start + __MEMORY_SIZE;
9655ad03 263
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264#ifdef CONFIG_CMDLINE_BOOL
265 strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
266#else
267 strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
268#endif
9655ad03 269
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270 /* Save unparsed command line copy for /proc/cmdline */
271 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
9655ad03
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272 *cmdline_p = command_line;
273
01066625
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274 parse_early_param();
275
9655ad03 276 sh_mv_setup();
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277
278 /*
279 * Find the highest page frame number we have available
280 */
281 max_pfn = PFN_DOWN(__pa(memory_end));
282
283 /*
284 * Determine low and high memory ranges:
285 */
286 max_low_pfn = max_pfn;
287 min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
288
289 nodes_clear(node_online_map);
dfbb9042
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290
291 /* Setup bootmem with available RAM */
01066625 292 setup_memory();
01066625 293 sparse_init();
1da177e4
LT
294
295#ifdef CONFIG_DUMMY_CONSOLE
296 conswitchp = &dummy_con;
297#endif
298
299 /* Perform the machine specific initialisation */
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300 if (likely(sh_mv.mv_setup))
301 sh_mv.mv_setup(cmdline_p);
1da177e4 302
dfbb9042 303 paging_init();
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304
305#ifdef CONFIG_SMP
306 plat_smp_setup();
307#endif
dfbb9042 308}
1da177e4 309
1da177e4 310static const char *cpu_name[] = {
a8f67f4b 311 [CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263",
b552c7e8 312 [CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619",
e5723e0e
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313 [CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706",
314 [CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708",
315 [CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710",
3ea6bc3d 316 [CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720",
31a49c4b
YS
317 [CPU_SH7721] = "SH7721", [CPU_SH7729] = "SH7729",
318 [CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S",
319 [CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751",
320 [CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760",
e5723e0e 321 [CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501",
7d740a06
YS
322 [CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770",
323 [CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781",
324 [CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785",
325 [CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3",
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326 [CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103",
327 [CPU_SH_NONE] = "Unknown"
1da177e4
LT
328};
329
11c19656 330const char *get_cpu_subtype(struct sh_cpuinfo *c)
1da177e4 331{
11c19656 332 return cpu_name[c->type];
1da177e4
LT
333}
334
335#ifdef CONFIG_PROC_FS
2220d164 336/* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
1da177e4 337static const char *cpu_flags[] = {
2220d164 338 "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
074f98df 339 "ptea", "llsc", "l2", "op32", NULL
1da177e4
LT
340};
341
11c19656 342static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c)
1da177e4
LT
343{
344 unsigned long i;
345
346 seq_printf(m, "cpu flags\t:");
347
11c19656 348 if (!c->flags) {
1da177e4
LT
349 seq_printf(m, " %s\n", cpu_flags[0]);
350 return;
351 }
352
de02797a 353 for (i = 0; cpu_flags[i]; i++)
11c19656 354 if ((c->flags & (1 << i)))
1da177e4
LT
355 seq_printf(m, " %s", cpu_flags[i+1]);
356
357 seq_printf(m, "\n");
358}
359
2c7834a6
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360static void show_cacheinfo(struct seq_file *m, const char *type,
361 struct cache_info info)
1da177e4
LT
362{
363 unsigned int cache_size;
364
365 cache_size = info.ways * info.sets * info.linesz;
366
de02797a
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367 seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
368 type, cache_size >> 10, info.ways);
1da177e4
LT
369}
370
371/*
372 * Get CPU information for use by the procfs.
373 */
374static int show_cpuinfo(struct seq_file *m, void *v)
375{
11c19656
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376 struct sh_cpuinfo *c = v;
377 unsigned int cpu = c - cpu_data;
378
379 if (!cpu_online(cpu))
380 return 0;
1da177e4 381
11c19656 382 if (cpu == 0)
1da177e4
LT
383 seq_printf(m, "machine\t\t: %s\n", get_system_type());
384
385 seq_printf(m, "processor\t: %d\n", cpu);
96b644bd 386 seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
11c19656 387 seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
1da177e4 388
11c19656 389 show_cpuflags(m, c);
1da177e4
LT
390
391 seq_printf(m, "cache type\t: ");
392
393 /*
394 * Check for what type of cache we have, we support both the
395 * unified cache on the SH-2 and SH-3, as well as the harvard
396 * style cache on the SH-4.
397 */
11c19656 398 if (c->icache.flags & SH_CACHE_COMBINED) {
1da177e4 399 seq_printf(m, "unified\n");
11c19656 400 show_cacheinfo(m, "cache", c->icache);
1da177e4
LT
401 } else {
402 seq_printf(m, "split (harvard)\n");
11c19656
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403 show_cacheinfo(m, "icache", c->icache);
404 show_cacheinfo(m, "dcache", c->dcache);
1da177e4
LT
405 }
406
72c35543 407 /* Optional secondary cache */
11c19656
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408 if (c->flags & CPU_HAS_L2_CACHE)
409 show_cacheinfo(m, "scache", c->scache);
72c35543 410
1da177e4 411 seq_printf(m, "bogomips\t: %lu.%02lu\n",
11c19656
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412 c->loops_per_jiffy/(500000/HZ),
413 (c->loops_per_jiffy/(5000/HZ)) % 100);
1da177e4 414
db62e5bd 415 return 0;
1da177e4
LT
416}
417
1da177e4
LT
418static void *c_start(struct seq_file *m, loff_t *pos)
419{
420 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
421}
422static void *c_next(struct seq_file *m, void *v, loff_t *pos)
423{
424 ++*pos;
425 return c_start(m, pos);
426}
427static void c_stop(struct seq_file *m, void *v)
428{
429}
430struct seq_operations cpuinfo_op = {
431 .start = c_start,
432 .next = c_next,
433 .stop = c_stop,
434 .show = show_cpuinfo,
435};
436#endif /* CONFIG_PROC_FS */
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