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 | |
19d8f84f | 7 | * Copyright (C) 2002 - 2010 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> | |
1da177e4 LT |
15 | #include <linux/root_dev.h> |
16 | #include <linux/utsname.h> | |
01066625 | 17 | #include <linux/nodemask.h> |
1da177e4 | 18 | #include <linux/cpu.h> |
22a9835c | 19 | #include <linux/pfn.h> |
711fa809 | 20 | #include <linux/fs.h> |
01066625 | 21 | #include <linux/mm.h> |
4d5ade5b | 22 | #include <linux/kexec.h> |
98d877c4 | 23 | #include <linux/module.h> |
0016a126 | 24 | #include <linux/smp.h> |
b9e393c2 | 25 | #include <linux/err.h> |
daf423db | 26 | #include <linux/crash_dump.h> |
fa43972f | 27 | #include <linux/mmzone.h> |
cf204fa7 PM |
28 | #include <linux/clk.h> |
29 | #include <linux/delay.h> | |
87a00dc0 | 30 | #include <linux/platform_device.h> |
95f72d1e | 31 | #include <linux/memblock.h> |
1da177e4 LT |
32 | #include <asm/uaccess.h> |
33 | #include <asm/io.h> | |
7a302a96 | 34 | #include <asm/page.h> |
cd01204b | 35 | #include <asm/elf.h> |
1da177e4 LT |
36 | #include <asm/sections.h> |
37 | #include <asm/irq.h> | |
38 | #include <asm/setup.h> | |
de02797a | 39 | #include <asm/clock.h> |
c9f4a3f5 | 40 | #include <asm/smp.h> |
01066625 | 41 | #include <asm/mmu_context.h> |
19d8f84f | 42 | #include <asm/mmzone.h> |
9cc1cf38 | 43 | #include <asm/sparsemem.h> |
1da177e4 | 44 | |
1da177e4 LT |
45 | /* |
46 | * Initialize loops_per_jiffy as 10000000 (1000MIPS). | |
47 | * This value will be used at the very early stage of serial setup. | |
48 | * The bigger value means no problem. | |
49 | */ | |
2d4a73d5 PM |
50 | struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = { |
51 | [0] = { | |
52 | .type = CPU_SH_NONE, | |
e82da214 | 53 | .family = CPU_FAMILY_UNKNOWN, |
2d4a73d5 | 54 | .loops_per_jiffy = 10000000, |
2f98492c | 55 | .phys_bits = MAX_PHYSMEM_BITS, |
2d4a73d5 PM |
56 | }, |
57 | }; | |
58 | EXPORT_SYMBOL(cpu_data); | |
82f81f47 PM |
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 | */ | |
fd8f20e8 | 64 | struct sh_machine_vector sh_mv = { .mv_name = "generic", }; |
971ac16d | 65 | EXPORT_SYMBOL(sh_mv); |
82f81f47 | 66 | |
2c7834a6 | 67 | #ifdef CONFIG_VT |
1da177e4 | 68 | struct screen_info screen_info; |
2c7834a6 | 69 | #endif |
1da177e4 | 70 | |
1da177e4 LT |
71 | extern int root_mountflags; |
72 | ||
65463b73 | 73 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 74 | #define RAMDISK_PROMPT_FLAG 0x8000 |
65463b73 | 75 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 76 | |
53c82622 | 77 | static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, }; |
1da177e4 | 78 | |
69d1ef4c PM |
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 | }; | |
1da177e4 | 88 | |
3d83984e MD |
89 | static struct resource bss_resource = { |
90 | .name = "Kernel bss", | |
91 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
92 | }; | |
93 | ||
98d877c4 PM |
94 | unsigned long memory_start; |
95 | EXPORT_SYMBOL(memory_start); | |
7e5186ea | 96 | unsigned long memory_end = 0; |
98d877c4 | 97 | EXPORT_SYMBOL(memory_end); |
5e2ff328 | 98 | unsigned long memory_limit = 0; |
1da177e4 | 99 | |
0146ba78 MD |
100 | static struct resource mem_resources[MAX_NUMNODES]; |
101 | ||
cd01204b PM |
102 | int l1i_cache_shape, l1d_cache_shape, l2_cache_shape; |
103 | ||
9655ad03 | 104 | static int __init early_parse_mem(char *p) |
1da177e4 | 105 | { |
5e2ff328 PM |
106 | if (!p) |
107 | return 1; | |
1da177e4 | 108 | |
5e2ff328 | 109 | memory_limit = PAGE_ALIGN(memparse(p, &p)); |
80a68a43 | 110 | |
5e2ff328 | 111 | pr_notice("Memory limited to %ldMB\n", memory_limit >> 20); |
2c7834a6 | 112 | |
1da177e4 LT |
113 | return 0; |
114 | } | |
9655ad03 | 115 | early_param("mem", early_parse_mem); |
1da177e4 | 116 | |
4bc277ac | 117 | void __init check_for_initrd(void) |
9b7a3785 PM |
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 | ||
901c28c2 NI |
139 | if (unlikely(start < __MEMORY_START)) { |
140 | pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n", | |
141 | start, __MEMORY_START); | |
9b7a3785 PM |
142 | goto disable; |
143 | } | |
144 | ||
95f72d1e | 145 | if (unlikely(end > memblock_end_of_DRAM())) { |
9b7a3785 PM |
146 | pr_err("initrd extends beyond end of memory " |
147 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
95f72d1e | 148 | end, (unsigned long)memblock_end_of_DRAM()); |
9b7a3785 PM |
149 | goto disable; |
150 | } | |
151 | ||
152 | /* | |
25985edc | 153 | * If we got this far in spite of the boot loader's best efforts |
9b7a3785 PM |
154 | * to the contrary, assume we actually have a valid initrd and |
155 | * fix up the root dev. | |
156 | */ | |
157 | ROOT_DEV = Root_RAM0; | |
158 | ||
159 | /* | |
160 | * Address sanitization | |
161 | */ | |
901c28c2 | 162 | initrd_start = (unsigned long)__va(start); |
9b7a3785 PM |
163 | initrd_end = initrd_start + INITRD_SIZE; |
164 | ||
95f72d1e | 165 | memblock_reserve(__pa(initrd_start), INITRD_SIZE); |
9b7a3785 PM |
166 | |
167 | return; | |
168 | ||
169 | disable: | |
170 | pr_info("initrd disabled\n"); | |
171 | initrd_start = initrd_end = 0; | |
172 | #endif | |
173 | } | |
174 | ||
cf204fa7 PM |
175 | void __cpuinit calibrate_delay(void) |
176 | { | |
177 | struct clk *clk = clk_get(NULL, "cpu_clk"); | |
178 | ||
179 | if (IS_ERR(clk)) | |
180 | panic("Need a sane CPU clock definition!"); | |
181 | ||
182 | loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ; | |
183 | ||
184 | printk(KERN_INFO "Calibrating delay loop (skipped)... " | |
185 | "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n", | |
186 | loops_per_jiffy/(500000/HZ), | |
187 | (loops_per_jiffy/(5000/HZ)) % 100, | |
188 | loops_per_jiffy); | |
189 | } | |
cf204fa7 | 190 | |
0146ba78 MD |
191 | void __init __add_active_range(unsigned int nid, unsigned long start_pfn, |
192 | unsigned long end_pfn) | |
193 | { | |
194 | struct resource *res = &mem_resources[nid]; | |
21823259 | 195 | unsigned long start, end; |
0146ba78 MD |
196 | |
197 | WARN_ON(res->name); /* max one active range per node for now */ | |
198 | ||
21823259 PM |
199 | start = start_pfn << PAGE_SHIFT; |
200 | end = end_pfn << PAGE_SHIFT; | |
201 | ||
0146ba78 | 202 | res->name = "System RAM"; |
21823259 PM |
203 | res->start = start; |
204 | res->end = end - 1; | |
0146ba78 | 205 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
21823259 | 206 | |
0146ba78 MD |
207 | if (request_resource(&iomem_resource, res)) { |
208 | pr_err("unable to request memory_resource 0x%lx 0x%lx\n", | |
209 | start_pfn, end_pfn); | |
210 | return; | |
211 | } | |
212 | ||
213 | /* | |
41309b7a SH |
214 | * We don't know which RAM region contains kernel data or |
215 | * the reserved crashkernel region, so try it repeatedly | |
216 | * and let the resource manager test it. | |
0146ba78 MD |
217 | */ |
218 | request_resource(res, &code_resource); | |
219 | request_resource(res, &data_resource); | |
220 | request_resource(res, &bss_resource); | |
41309b7a SH |
221 | #ifdef CONFIG_KEXEC |
222 | request_resource(res, &crashk_res); | |
223 | #endif | |
0146ba78 | 224 | |
1da177e4 | 225 | /* |
21823259 PM |
226 | * Also make sure that there is a PMB mapping that covers this |
227 | * range before we attempt to activate it, to avoid reset by MMU. | |
228 | * We can hit this path with NUMA or memory hot-add. | |
1da177e4 | 229 | */ |
21823259 PM |
230 | pmb_bolt_mapping((unsigned long)__va(start), start, end - start, |
231 | PAGE_KERNEL); | |
c601a51a | 232 | |
534cfbee TH |
233 | memblock_set_node(PFN_PHYS(start_pfn), |
234 | PFN_PHYS(end_pfn - start_pfn), nid); | |
01066625 | 235 | } |
01066625 | 236 | |
19d8f84f | 237 | void __init __weak plat_early_device_setup(void) |
87a00dc0 MD |
238 | { |
239 | } | |
240 | ||
01066625 PM |
241 | void __init setup_arch(char **cmdline_p) |
242 | { | |
243 | enable_mmu(); | |
244 | ||
01066625 PM |
245 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); |
246 | ||
0105346c PM |
247 | printk(KERN_NOTICE "Boot params:\n" |
248 | "... MOUNT_ROOT_RDONLY - %08lx\n" | |
249 | "... RAMDISK_FLAGS - %08lx\n" | |
250 | "... ORIG_ROOT_DEV - %08lx\n" | |
251 | "... LOADER_TYPE - %08lx\n" | |
252 | "... INITRD_START - %08lx\n" | |
253 | "... INITRD_SIZE - %08lx\n", | |
254 | MOUNT_ROOT_RDONLY, RAMDISK_FLAGS, | |
255 | ORIG_ROOT_DEV, LOADER_TYPE, | |
256 | INITRD_START, INITRD_SIZE); | |
257 | ||
01066625 PM |
258 | #ifdef CONFIG_BLK_DEV_RAM |
259 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
260 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | |
261 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | |
262 | #endif | |
263 | ||
264 | if (!MOUNT_ROOT_RDONLY) | |
265 | root_mountflags &= ~MS_RDONLY; | |
266 | init_mm.start_code = (unsigned long) _text; | |
267 | init_mm.end_code = (unsigned long) _etext; | |
268 | init_mm.end_data = (unsigned long) _edata; | |
269 | init_mm.brk = (unsigned long) _end; | |
270 | ||
271 | code_resource.start = virt_to_phys(_text); | |
272 | code_resource.end = virt_to_phys(_etext)-1; | |
273 | data_resource.start = virt_to_phys(_etext); | |
274 | data_resource.end = virt_to_phys(_edata)-1; | |
3d83984e | 275 | bss_resource.start = virt_to_phys(__bss_start); |
363737d6 | 276 | bss_resource.end = virt_to_phys(__bss_stop)-1; |
01066625 | 277 | |
d724a9c9 | 278 | #ifdef CONFIG_CMDLINE_OVERWRITE |
ba36197c PM |
279 | strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line)); |
280 | #else | |
281 | strlcpy(command_line, COMMAND_LINE, sizeof(command_line)); | |
d724a9c9 PM |
282 | #ifdef CONFIG_CMDLINE_EXTEND |
283 | strlcat(command_line, " ", sizeof(command_line)); | |
284 | strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line)); | |
285 | #endif | |
ba36197c | 286 | #endif |
9655ad03 | 287 | |
ba36197c PM |
288 | /* Save unparsed command line copy for /proc/cmdline */ |
289 | memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); | |
9655ad03 PM |
290 | *cmdline_p = command_line; |
291 | ||
01066625 PM |
292 | parse_early_param(); |
293 | ||
87a00dc0 MD |
294 | plat_early_device_setup(); |
295 | ||
9655ad03 | 296 | sh_mv_setup(); |
01066625 | 297 | |
4bc277ac PM |
298 | /* Let earlyprintk output early console messages */ |
299 | early_platform_driver_probe("earlyprintk", 1, 1); | |
dfbb9042 | 300 | |
4bc277ac | 301 | paging_init(); |
1da177e4 LT |
302 | |
303 | #ifdef CONFIG_DUMMY_CONSOLE | |
304 | conswitchp = &dummy_con; | |
305 | #endif | |
306 | ||
307 | /* Perform the machine specific initialisation */ | |
2c7834a6 PM |
308 | if (likely(sh_mv.mv_setup)) |
309 | sh_mv.mv_setup(cmdline_p); | |
1da177e4 | 310 | |
0016a126 | 311 | plat_smp_setup(); |
dfbb9042 | 312 | } |
1da177e4 | 313 | |
eb9b9b56 MD |
314 | /* processor boot mode configuration */ |
315 | int generic_mode_pins(void) | |
316 | { | |
317 | pr_warning("generic_mode_pins(): missing mode pin configuration\n"); | |
318 | return 0; | |
319 | } | |
320 | ||
321 | int test_mode_pin(int pin) | |
322 | { | |
0d4fdbb6 | 323 | return sh_mv.mv_mode_pins() & pin; |
eb9b9b56 | 324 | } |