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Paul Mundt711fa802006-10-03 13:14:04 +09001/*
Paul Mundt11c19652006-12-25 10:19:56 +09002 * arch/sh/kernel/setup.c
3 *
4 * This file handles the architecture-dependent parts of initialization
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
6 * Copyright (C) 1999 Niibe Yutaka
Paul Mundt01066622007-03-28 16:38:13 +09007 * Copyright (C) 2002 - 2007 Paul Mundt
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 */
Jon Smirl894673e2006-07-10 04:44:13 -07009#include <linux/screen_info.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#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>
Paul Mundt01066622007-03-28 16:38:13 +090018#include <linux/nodemask.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/cpu.h>
Dave Hansen22a98352006-03-27 01:16:04 -080020#include <linux/pfn.h>
Paul Mundt711fa802006-10-03 13:14:04 +090021#include <linux/fs.h>
Paul Mundt01066622007-03-28 16:38:13 +090022#include <linux/mm.h>
Paul Mundt4d5ade52007-04-27 11:25:57 +090023#include <linux/kexec.h>
Paul Mundt98d877c2007-07-20 16:59:49 +090024#include <linux/module.h>
Paul Mundt0016a122007-09-21 18:39:49 +090025#include <linux/smp.h>
Paul Mundtb9e393c2008-03-07 17:19:58 +090026#include <linux/err.h>
27#include <linux/debugfs.h>
Simon Hormandaf423d2008-07-30 10:29:39 +100028#include <linux/crash_dump.h>
Paul Mundtfa439722008-09-04 18:53:58 +090029#include <linux/mmzone.h>
Paul Mundtcf204fa2008-09-08 20:47:42 +090030#include <linux/clk.h>
31#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/uaccess.h>
33#include <asm/io.h>
Paul Mundt7a302a92007-05-14 12:50:43 +090034#include <asm/page.h>
Paul Mundtcd012042007-12-10 15:50:28 +090035#include <asm/elf.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <asm/sections.h>
37#include <asm/irq.h>
38#include <asm/setup.h>
Paul Mundtde027972006-02-01 03:06:02 -080039#include <asm/clock.h>
Paul Mundt01066622007-03-28 16:38:13 +090040#include <asm/mmu_context.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Linus Torvalds1da177e2005-04-16 15:20:36 -070042/*
43 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
44 * This value will be used at the very early stage of serial setup.
45 * The bigger value means no problem.
46 */
Paul Mundt2d4a73d2007-09-21 18:01:40 +090047struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
48 [0] = {
49 .type = CPU_SH_NONE,
50 .loops_per_jiffy = 10000000,
51 },
52};
53EXPORT_SYMBOL(cpu_data);
Paul Mundt82f81f42007-05-15 15:19:34 +090054
55/*
56 * The machine vector. First entry in .machvec.init, or clobbered by
57 * sh_mv= on the command line, prior to .machvec.init teardown.
58 */
Paul Mundtfd8f20e2007-05-15 15:38:30 +090059struct sh_machine_vector sh_mv = { .mv_name = "generic", };
Paul Mundt971ac162008-04-25 16:01:38 +090060EXPORT_SYMBOL(sh_mv);
Paul Mundt82f81f42007-05-15 15:19:34 +090061
Paul Mundt2c7834a2006-09-27 18:17:31 +090062#ifdef CONFIG_VT
Linus Torvalds1da177e2005-04-16 15:20:36 -070063struct screen_info screen_info;
Paul Mundt2c7834a2006-09-27 18:17:31 +090064#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Linus Torvalds1da177e2005-04-16 15:20:36 -070066extern int root_mountflags;
67
Paul Mundt65463b72005-11-07 00:58:24 -080068#define RAMDISK_IMAGE_START_MASK 0x07FF
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#define RAMDISK_PROMPT_FLAG 0x8000
Paul Mundt65463b72005-11-07 00:58:24 -080070#define RAMDISK_LOAD_FLAG 0x4000
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Alon Bar-Lev53c82622007-02-12 00:54:19 -080072static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
Paul Mundt69d1ef42007-10-30 17:32:08 +090074static struct resource code_resource = {
75 .name = "Kernel code",
76 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
77};
78
79static struct resource data_resource = {
80 .name = "Kernel data",
81 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
82};
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Magnus Damm3d839842008-04-23 20:50:27 +090084static struct resource bss_resource = {
85 .name = "Kernel bss",
86 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
87};
88
Paul Mundt98d877c2007-07-20 16:59:49 +090089unsigned long memory_start;
90EXPORT_SYMBOL(memory_start);
Paul Mundt7e5186e2007-10-30 17:18:08 +090091unsigned long memory_end = 0;
Paul Mundt98d877c2007-07-20 16:59:49 +090092EXPORT_SYMBOL(memory_end);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Magnus Damm0146ba72008-04-23 20:56:44 +090094static struct resource mem_resources[MAX_NUMNODES];
95
Paul Mundtcd012042007-12-10 15:50:28 +090096int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
97
Paul Mundt9655ad02007-05-14 15:59:09 +090098static int __init early_parse_mem(char *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099{
Paul Mundt9655ad02007-05-14 15:59:09 +0900100 unsigned long size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900102 memory_start = (unsigned long)__va(__MEMORY_START);
Paul Mundt9655ad02007-05-14 15:59:09 +0900103 size = memparse(p, &p);
Stuart Menefy80a68a42007-11-26 21:16:09 +0900104
105 if (size > __MEMORY_SIZE) {
Paul Mundt0bd47812009-03-31 08:25:54 +0900106 printk(KERN_ERR
Stuart Menefy80a68a42007-11-26 21:16:09 +0900107 "Using mem= to increase the size of kernel memory "
108 "is not allowed.\n"
109 " Recompile the kernel with the correct value for "
Paul Mundt0bd47812009-03-31 08:25:54 +0900110 "CONFIG_MEMORY_SIZE.\n");
Stuart Menefy80a68a42007-11-26 21:16:09 +0900111 return 0;
112 }
113
Paul Mundt9655ad02007-05-14 15:59:09 +0900114 memory_end = memory_start + size;
Paul Mundt2c7834a2006-09-27 18:17:31 +0900115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 return 0;
117}
Paul Mundt9655ad02007-05-14 15:59:09 +0900118early_param("mem", early_parse_mem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Paul Mundt01066622007-03-28 16:38:13 +0900120/*
121 * Register fully available low RAM pages with the bootmem allocator.
122 */
123static void __init register_bootmem_low_pages(void)
124{
125 unsigned long curr_pfn, last_pfn, pages;
126
127 /*
128 * We are rounding up the start address of usable memory:
129 */
130 curr_pfn = PFN_UP(__MEMORY_START);
131
132 /*
133 * ... and at the end of the usable range downwards:
134 */
135 last_pfn = PFN_DOWN(__pa(memory_end));
136
137 if (last_pfn > max_low_pfn)
138 last_pfn = max_low_pfn;
139
140 pages = last_pfn - curr_pfn;
141 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
142}
143
Bernhard Walle7d7712a2007-10-18 23:41:02 -0700144#ifdef CONFIG_KEXEC
145static void __init reserve_crashkernel(void)
146{
147 unsigned long long free_mem;
148 unsigned long long crash_size, crash_base;
Magnus Damm4aeaa222008-10-09 18:42:55 +0900149 void *vp;
Bernhard Walle7d7712a2007-10-18 23:41:02 -0700150 int ret;
151
152 free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
153
154 ret = parse_crashkernel(boot_command_line, free_mem,
155 &crash_size, &crash_base);
156 if (ret == 0 && crash_size) {
Bernhard Walle18a01a3b2008-02-07 00:15:19 -0800157 if (crash_base <= 0) {
Magnus Damm4aeaa222008-10-09 18:42:55 +0900158 vp = alloc_bootmem_nopanic(crash_size);
159 if (!vp) {
160 printk(KERN_INFO "crashkernel allocation "
161 "failed\n");
162 return;
163 }
164 crash_base = __pa(vp);
165 } else if (reserve_bootmem(crash_base, crash_size,
Bernhard Walle18a01a3b2008-02-07 00:15:19 -0800166 BOOTMEM_EXCLUSIVE) < 0) {
167 printk(KERN_INFO "crashkernel reservation failed - "
168 "memory is in use\n");
169 return;
170 }
171
172 printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
173 "for crashkernel (System RAM: %ldMB)\n",
174 (unsigned long)(crash_size >> 20),
175 (unsigned long)(crash_base >> 20),
176 (unsigned long)(free_mem >> 20));
177 crashk_res.start = crash_base;
178 crashk_res.end = crash_base + crash_size - 1;
Magnus Damm34894c72008-08-27 18:15:43 +0900179 insert_resource(&iomem_resource, &crashk_res);
Bernhard Walle7d7712a2007-10-18 23:41:02 -0700180 }
181}
182#else
183static inline void __init reserve_crashkernel(void)
184{}
185#endif
186
Paul Mundtcf204fa2008-09-08 20:47:42 +0900187#ifndef CONFIG_GENERIC_CALIBRATE_DELAY
188void __cpuinit calibrate_delay(void)
189{
190 struct clk *clk = clk_get(NULL, "cpu_clk");
191
192 if (IS_ERR(clk))
193 panic("Need a sane CPU clock definition!");
194
195 loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
196
197 printk(KERN_INFO "Calibrating delay loop (skipped)... "
198 "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
199 loops_per_jiffy/(500000/HZ),
200 (loops_per_jiffy/(5000/HZ)) % 100,
201 loops_per_jiffy);
202}
203#endif
204
Magnus Damm0146ba72008-04-23 20:56:44 +0900205void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
206 unsigned long end_pfn)
207{
208 struct resource *res = &mem_resources[nid];
209
210 WARN_ON(res->name); /* max one active range per node for now */
211
212 res->name = "System RAM";
213 res->start = start_pfn << PAGE_SHIFT;
214 res->end = (end_pfn << PAGE_SHIFT) - 1;
215 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
216 if (request_resource(&iomem_resource, res)) {
217 pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
218 start_pfn, end_pfn);
219 return;
220 }
221
222 /*
223 * We don't know which RAM region contains kernel data,
224 * so we try it repeatedly and let the resource manager
225 * test it.
226 */
227 request_resource(res, &code_resource);
228 request_resource(res, &data_resource);
229 request_resource(res, &bss_resource);
230
Magnus Damm0146ba72008-04-23 20:56:44 +0900231 add_active_range(nid, start_pfn, end_pfn);
232}
233
Paul Mundt2826fa62007-06-01 17:04:36 +0900234void __init setup_bootmem_allocator(unsigned long free_pfn)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235{
236 unsigned long bootmap_size;
Paul Mundt01066622007-03-28 16:38:13 +0900237
238 /*
239 * Find a proper area for the bootmem bitmap. After this
240 * bootstrap step all allocations (until the page allocator
241 * is intact) must be done via bootmem_alloc().
242 */
Paul Mundt2826fa62007-06-01 17:04:36 +0900243 bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
Paul Mundt01066622007-03-28 16:38:13 +0900244 min_low_pfn, max_low_pfn);
245
Magnus Damm0146ba72008-04-23 20:56:44 +0900246 __add_active_range(0, min_low_pfn, max_low_pfn);
Paul Mundt01066622007-03-28 16:38:13 +0900247 register_bootmem_low_pages();
248
249 node_set_online(0);
250
251 /*
252 * Reserve the kernel text and
253 * Reserve the bootmem bitmap. We do this in two steps (first step
254 * was init_bootmem()), because this catches the (definitely buggy)
255 * case of us accidentally initializing the bootmem allocator with
256 * an invalid RAM area.
257 */
Stuart Menefyf040dda2008-09-05 16:29:40 +0900258 reserve_bootmem(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
259 (PFN_PHYS(free_pfn) + bootmap_size + PAGE_SIZE - 1) -
260 (__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET),
261 BOOTMEM_DEFAULT);
Paul Mundt01066622007-03-28 16:38:13 +0900262
263 /*
Christopher SMITH48865162008-10-06 12:46:18 +0100264 * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
Paul Mundt01066622007-03-28 16:38:13 +0900265 */
Christopher SMITH48865162008-10-06 12:46:18 +0100266 if (CONFIG_ZERO_PAGE_OFFSET != 0)
267 reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET,
268 BOOTMEM_DEFAULT);
Paul Mundt01066622007-03-28 16:38:13 +0900269
Paul Mundt2826fa62007-06-01 17:04:36 +0900270 sparse_memory_present_with_active_regions(0);
271
Paul Mundt01066622007-03-28 16:38:13 +0900272#ifdef CONFIG_BLK_DEV_INITRD
Paul Mundt3f9654f2007-10-30 17:25:29 +0900273 ROOT_DEV = Root_RAM0;
Paul Mundt01066622007-03-28 16:38:13 +0900274
275 if (LOADER_TYPE && INITRD_START) {
Stuart Menefy28d6e522008-09-05 16:14:17 +0900276 unsigned long initrd_start_phys = INITRD_START + __MEMORY_START;
277
278 if (initrd_start_phys + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
279 reserve_bootmem(initrd_start_phys, INITRD_SIZE,
280 BOOTMEM_DEFAULT);
281 initrd_start = (unsigned long)__va(initrd_start_phys);
Paul Mundt01066622007-03-28 16:38:13 +0900282 initrd_end = initrd_start + INITRD_SIZE;
283 } else {
284 printk("initrd extends beyond end of memory "
Stuart Menefy28d6e522008-09-05 16:14:17 +0900285 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
286 initrd_start_phys + INITRD_SIZE,
Paul Mundt9a19eb2a2008-10-20 11:37:58 +0900287 (unsigned long)PFN_PHYS(max_low_pfn));
Paul Mundt01066622007-03-28 16:38:13 +0900288 initrd_start = 0;
289 }
290 }
291#endif
Bernhard Walle7d7712a2007-10-18 23:41:02 -0700292
293 reserve_crashkernel();
Paul Mundt01066622007-03-28 16:38:13 +0900294}
295
296#ifndef CONFIG_NEED_MULTIPLE_NODES
297static void __init setup_memory(void)
298{
299 unsigned long start_pfn;
300
301 /*
302 * Partially used pages are not usable - thus
303 * we are rounding upwards:
304 */
305 start_pfn = PFN_UP(__pa(_end));
306 setup_bootmem_allocator(start_pfn);
307}
308#else
309extern void __init setup_memory(void);
310#endif
311
Simon Hormandaf423d2008-07-30 10:29:39 +1000312/*
313 * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
314 * is_kdump_kernel() to determine if we are booting after a panic. Hence
315 * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
316 */
317#ifdef CONFIG_CRASH_DUMP
318/* elfcorehdr= specifies the location of elf core header
319 * stored by the crashed kernel.
320 */
321static int __init parse_elfcorehdr(char *arg)
322{
323 if (!arg)
324 return -EINVAL;
325 elfcorehdr_addr = memparse(arg, &arg);
326 return 0;
327}
328early_param("elfcorehdr", parse_elfcorehdr);
329#endif
330
Paul Mundt01066622007-03-28 16:38:13 +0900331void __init setup_arch(char **cmdline_p)
332{
333 enable_mmu();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
336
Paul Mundt01053462008-05-13 17:40:17 +0900337 printk(KERN_NOTICE "Boot params:\n"
338 "... MOUNT_ROOT_RDONLY - %08lx\n"
339 "... RAMDISK_FLAGS - %08lx\n"
340 "... ORIG_ROOT_DEV - %08lx\n"
341 "... LOADER_TYPE - %08lx\n"
342 "... INITRD_START - %08lx\n"
343 "... INITRD_SIZE - %08lx\n",
344 MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
345 ORIG_ROOT_DEV, LOADER_TYPE,
346 INITRD_START, INITRD_SIZE);
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348#ifdef CONFIG_BLK_DEV_RAM
349 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
350 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
351 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
352#endif
353
354 if (!MOUNT_ROOT_RDONLY)
355 root_mountflags &= ~MS_RDONLY;
356 init_mm.start_code = (unsigned long) _text;
357 init_mm.end_code = (unsigned long) _etext;
358 init_mm.end_data = (unsigned long) _edata;
359 init_mm.brk = (unsigned long) _end;
360
Paul Mundt01066622007-03-28 16:38:13 +0900361 code_resource.start = virt_to_phys(_text);
362 code_resource.end = virt_to_phys(_etext)-1;
363 data_resource.start = virt_to_phys(_etext);
364 data_resource.end = virt_to_phys(_edata)-1;
Magnus Damm3d839842008-04-23 20:50:27 +0900365 bss_resource.start = virt_to_phys(__bss_start);
366 bss_resource.end = virt_to_phys(_ebss)-1;
Paul Mundt01066622007-03-28 16:38:13 +0900367
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900368 memory_start = (unsigned long)__va(__MEMORY_START);
Paul Mundt7e5186e2007-10-30 17:18:08 +0900369 if (!memory_end)
370 memory_end = memory_start + __MEMORY_SIZE;
Paul Mundt9655ad02007-05-14 15:59:09 +0900371
Paul Mundtba36197c2007-05-14 17:48:00 +0900372#ifdef CONFIG_CMDLINE_BOOL
373 strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
374#else
375 strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
376#endif
Paul Mundt9655ad02007-05-14 15:59:09 +0900377
Paul Mundtba36197c2007-05-14 17:48:00 +0900378 /* Save unparsed command line copy for /proc/cmdline */
379 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
Paul Mundt9655ad02007-05-14 15:59:09 +0900380 *cmdline_p = command_line;
381
Paul Mundt01066622007-03-28 16:38:13 +0900382 parse_early_param();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Paul Mundt9655ad02007-05-14 15:59:09 +0900384 sh_mv_setup();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 /*
387 * Find the highest page frame number we have available
388 */
389 max_pfn = PFN_DOWN(__pa(memory_end));
390
391 /*
392 * Determine low and high memory ranges:
393 */
394 max_low_pfn = max_pfn;
Paul Mundt01066622007-03-28 16:38:13 +0900395 min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
Paul Mundt01066622007-03-28 16:38:13 +0900397 nodes_clear(node_online_map);
Paul Mundtdfbb9042007-05-23 17:48:36 +0900398
399 /* Setup bootmem with available RAM */
Paul Mundt01066622007-03-28 16:38:13 +0900400 setup_memory();
Paul Mundt01066622007-03-28 16:38:13 +0900401 sparse_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403#ifdef CONFIG_DUMMY_CONSOLE
404 conswitchp = &dummy_con;
405#endif
406
407 /* Perform the machine specific initialisation */
Paul Mundt2c7834a2006-09-27 18:17:31 +0900408 if (likely(sh_mv.mv_setup))
409 sh_mv.mv_setup(cmdline_p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
Paul Mundtdfbb9042007-05-23 17:48:36 +0900411 paging_init();
Paul Mundt0016a122007-09-21 18:39:49 +0900412
413#ifdef CONFIG_SMP
414 plat_smp_setup();
415#endif
Paul Mundtdfbb9042007-05-23 17:48:36 +0900416}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418static const char *cpu_name[] = {
Peter Griffin28259992008-11-28 22:48:20 +0900419 [CPU_SH7201] = "SH7201",
Paul Mundta8f67f42007-11-26 19:54:02 +0900420 [CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263",
Paul Mundtb552c7e2006-11-20 14:14:29 +0900421 [CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619",
Paul Mundte5723e02006-09-27 17:38:11 +0900422 [CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706",
423 [CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708",
424 [CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710",
Markus Brunner3ea6bc32007-08-20 08:59:33 +0900425 [CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720",
Yoshihiro Shimoda31a49c42007-12-26 11:45:06 +0900426 [CPU_SH7721] = "SH7721", [CPU_SH7729] = "SH7729",
427 [CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S",
428 [CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751",
429 [CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760",
Paul Mundte5723e02006-09-27 17:38:11 +0900430 [CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501",
Yoshihiro Shimoda7d740a02008-01-07 14:40:07 +0900431 [CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770",
432 [CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781",
433 [CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785",
Kuninori Morimoto55ba99e2009-03-03 15:40:25 +0900434 [CPU_SH7786] = "SH7786",
Yoshihiro Shimoda7d740a02008-01-07 14:40:07 +0900435 [CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3",
Paul Mundtc2672f62007-11-20 18:29:00 +0900436 [CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103",
Paul Mundt178dd0c2008-04-09 17:56:18 +0900437 [CPU_MXG] = "MX-G", [CPU_SH7723] = "SH7723",
Magnus Damm9109a302008-02-08 17:31:24 +0900438 [CPU_SH7366] = "SH7366", [CPU_SH_NONE] = "Unknown"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439};
440
Paul Mundt11c19652006-12-25 10:19:56 +0900441const char *get_cpu_subtype(struct sh_cpuinfo *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442{
Paul Mundt11c19652006-12-25 10:19:56 +0900443 return cpu_name[c->type];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444}
Adrian Bunkb19a33c2008-06-18 01:30:24 +0300445EXPORT_SYMBOL(get_cpu_subtype);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
447#ifdef CONFIG_PROC_FS
Paul Mundt2220d162006-09-27 18:24:28 +0900448/* Symbolic CPU flags, keep in sync with asm/cpu-features.h */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449static const char *cpu_flags[] = {
Paul Mundt2220d162006-09-27 18:24:28 +0900450 "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
Paul Mundt8263a672009-03-17 17:49:49 +0900451 "ptea", "llsc", "l2", "op32", "pteaex", NULL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452};
453
Paul Mundt11c19652006-12-25 10:19:56 +0900454static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455{
456 unsigned long i;
457
458 seq_printf(m, "cpu flags\t:");
459
Paul Mundt11c19652006-12-25 10:19:56 +0900460 if (!c->flags) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 seq_printf(m, " %s\n", cpu_flags[0]);
462 return;
463 }
464
Paul Mundtde027972006-02-01 03:06:02 -0800465 for (i = 0; cpu_flags[i]; i++)
Paul Mundt11c19652006-12-25 10:19:56 +0900466 if ((c->flags & (1 << i)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 seq_printf(m, " %s", cpu_flags[i+1]);
468
469 seq_printf(m, "\n");
470}
471
Paul Mundt2c7834a2006-09-27 18:17:31 +0900472static void show_cacheinfo(struct seq_file *m, const char *type,
473 struct cache_info info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474{
475 unsigned int cache_size;
476
477 cache_size = info.ways * info.sets * info.linesz;
478
Paul Mundtde027972006-02-01 03:06:02 -0800479 seq_printf(m, "%s size\t: %2dKiB (%d-way)\n",
480 type, cache_size >> 10, info.ways);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481}
482
483/*
484 * Get CPU information for use by the procfs.
485 */
486static int show_cpuinfo(struct seq_file *m, void *v)
487{
Paul Mundt11c19652006-12-25 10:19:56 +0900488 struct sh_cpuinfo *c = v;
489 unsigned int cpu = c - cpu_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Paul Mundt11c19652006-12-25 10:19:56 +0900491 if (!cpu_online(cpu))
492 return 0;
493
494 if (cpu == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 seq_printf(m, "machine\t\t: %s\n", get_system_type());
496
497 seq_printf(m, "processor\t: %d\n", cpu);
Serge E. Hallyn96b644b2006-10-02 02:18:13 -0700498 seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine);
Paul Mundt11c19652006-12-25 10:19:56 +0900499 seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c));
Stuart Menefy3611ee72008-07-02 15:15:09 +0900500 if (c->cut_major == -1)
501 seq_printf(m, "cut\t\t: unknown\n");
502 else if (c->cut_minor == -1)
503 seq_printf(m, "cut\t\t: %d.x\n", c->cut_major);
504 else
505 seq_printf(m, "cut\t\t: %d.%d\n", c->cut_major, c->cut_minor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
Paul Mundt11c19652006-12-25 10:19:56 +0900507 show_cpuflags(m, c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
509 seq_printf(m, "cache type\t: ");
510
511 /*
512 * Check for what type of cache we have, we support both the
513 * unified cache on the SH-2 and SH-3, as well as the harvard
514 * style cache on the SH-4.
515 */
Paul Mundt11c19652006-12-25 10:19:56 +0900516 if (c->icache.flags & SH_CACHE_COMBINED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 seq_printf(m, "unified\n");
Paul Mundt11c19652006-12-25 10:19:56 +0900518 show_cacheinfo(m, "cache", c->icache);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 } else {
520 seq_printf(m, "split (harvard)\n");
Paul Mundt11c19652006-12-25 10:19:56 +0900521 show_cacheinfo(m, "icache", c->icache);
522 show_cacheinfo(m, "dcache", c->dcache);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 }
524
Paul Mundt72c35542006-09-27 18:27:43 +0900525 /* Optional secondary cache */
Paul Mundt11c19652006-12-25 10:19:56 +0900526 if (c->flags & CPU_HAS_L2_CACHE)
527 show_cacheinfo(m, "scache", c->scache);
Paul Mundt72c35542006-09-27 18:27:43 +0900528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 seq_printf(m, "bogomips\t: %lu.%02lu\n",
Paul Mundt11c19652006-12-25 10:19:56 +0900530 c->loops_per_jiffy/(500000/HZ),
531 (c->loops_per_jiffy/(5000/HZ)) % 100);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
Paul Mundtdb62e5b2007-04-26 12:17:20 +0900533 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534}
535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536static void *c_start(struct seq_file *m, loff_t *pos)
537{
538 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
539}
540static void *c_next(struct seq_file *m, void *v, loff_t *pos)
541{
542 ++*pos;
543 return c_start(m, pos);
544}
545static void c_stop(struct seq_file *m, void *v)
546{
547}
Jan Engelhardt773c7bd2008-01-23 12:47:48 +0900548const struct seq_operations cpuinfo_op = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 .start = c_start,
550 .next = c_next,
551 .stop = c_stop,
552 .show = show_cpuinfo,
553};
554#endif /* CONFIG_PROC_FS */
Paul Mundtb9e393c2008-03-07 17:19:58 +0900555
556struct dentry *sh_debugfs_root;
557
558static int __init sh_debugfs_init(void)
559{
560 sh_debugfs_root = debugfs_create_dir("sh", NULL);
Zhaolei9986b312008-10-17 19:25:03 +0800561 if (!sh_debugfs_root)
562 return -ENOMEM;
Paul Mundtb9e393c2008-03-07 17:19:58 +0900563 if (IS_ERR(sh_debugfs_root))
564 return PTR_ERR(sh_debugfs_root);
565
566 return 0;
567}
568arch_initcall(sh_debugfs_init);