Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
711fa809 | 2 | /* |
11c19656 | 3 | * arch/sh/kernel/setup.c |
1da177e4 | 4 | * |
1da177e4 | 5 | * This file handles the architecture-dependent parts of initialization |
11c19656 PM |
6 | * |
7 | * Copyright (C) 1999 Niibe Yutaka | |
19d8f84f | 8 | * Copyright (C) 2002 - 2010 Paul Mundt |
1da177e4 | 9 | */ |
894673ee | 10 | #include <linux/screen_info.h> |
1da177e4 LT |
11 | #include <linux/ioport.h> |
12 | #include <linux/init.h> | |
13 | #include <linux/initrd.h> | |
1da177e4 | 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> |
7480e0aa RF |
32 | #include <linux/of.h> |
33 | #include <linux/of_fdt.h> | |
7c0f6ba6 | 34 | #include <linux/uaccess.h> |
e262e32d | 35 | #include <uapi/linux/mount.h> |
1da177e4 | 36 | #include <asm/io.h> |
7a302a96 | 37 | #include <asm/page.h> |
cd01204b | 38 | #include <asm/elf.h> |
1da177e4 LT |
39 | #include <asm/sections.h> |
40 | #include <asm/irq.h> | |
41 | #include <asm/setup.h> | |
de02797a | 42 | #include <asm/clock.h> |
c9f4a3f5 | 43 | #include <asm/smp.h> |
01066625 | 44 | #include <asm/mmu_context.h> |
19d8f84f | 45 | #include <asm/mmzone.h> |
9cc1cf38 | 46 | #include <asm/sparsemem.h> |
1da177e4 | 47 | |
1da177e4 LT |
48 | /* |
49 | * Initialize loops_per_jiffy as 10000000 (1000MIPS). | |
50 | * This value will be used at the very early stage of serial setup. | |
51 | * The bigger value means no problem. | |
52 | */ | |
2d4a73d5 PM |
53 | struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = { |
54 | [0] = { | |
55 | .type = CPU_SH_NONE, | |
e82da214 | 56 | .family = CPU_FAMILY_UNKNOWN, |
2d4a73d5 | 57 | .loops_per_jiffy = 10000000, |
2f98492c | 58 | .phys_bits = MAX_PHYSMEM_BITS, |
2d4a73d5 PM |
59 | }, |
60 | }; | |
61 | EXPORT_SYMBOL(cpu_data); | |
82f81f47 PM |
62 | |
63 | /* | |
64 | * The machine vector. First entry in .machvec.init, or clobbered by | |
65 | * sh_mv= on the command line, prior to .machvec.init teardown. | |
66 | */ | |
fd8f20e8 | 67 | struct sh_machine_vector sh_mv = { .mv_name = "generic", }; |
971ac16d | 68 | EXPORT_SYMBOL(sh_mv); |
82f81f47 | 69 | |
2c7834a6 | 70 | #ifdef CONFIG_VT |
1da177e4 | 71 | struct screen_info screen_info; |
2c7834a6 | 72 | #endif |
1da177e4 | 73 | |
1da177e4 LT |
74 | extern int root_mountflags; |
75 | ||
65463b73 | 76 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 77 | #define RAMDISK_PROMPT_FLAG 0x8000 |
65463b73 | 78 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 79 | |
53c82622 | 80 | static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, }; |
1da177e4 | 81 | |
69d1ef4c PM |
82 | static struct resource code_resource = { |
83 | .name = "Kernel code", | |
35d98e93 | 84 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, |
69d1ef4c PM |
85 | }; |
86 | ||
87 | static struct resource data_resource = { | |
88 | .name = "Kernel data", | |
35d98e93 | 89 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, |
69d1ef4c | 90 | }; |
1da177e4 | 91 | |
3d83984e MD |
92 | static struct resource bss_resource = { |
93 | .name = "Kernel bss", | |
35d98e93 | 94 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, |
3d83984e MD |
95 | }; |
96 | ||
98d877c4 PM |
97 | unsigned long memory_start; |
98 | EXPORT_SYMBOL(memory_start); | |
7e5186ea | 99 | unsigned long memory_end = 0; |
98d877c4 | 100 | EXPORT_SYMBOL(memory_end); |
5e2ff328 | 101 | unsigned long memory_limit = 0; |
1da177e4 | 102 | |
0146ba78 MD |
103 | static struct resource mem_resources[MAX_NUMNODES]; |
104 | ||
cd01204b PM |
105 | int l1i_cache_shape, l1d_cache_shape, l2_cache_shape; |
106 | ||
9655ad03 | 107 | static int __init early_parse_mem(char *p) |
1da177e4 | 108 | { |
5e2ff328 PM |
109 | if (!p) |
110 | return 1; | |
1da177e4 | 111 | |
5e2ff328 | 112 | memory_limit = PAGE_ALIGN(memparse(p, &p)); |
80a68a43 | 113 | |
5e2ff328 | 114 | pr_notice("Memory limited to %ldMB\n", memory_limit >> 20); |
2c7834a6 | 115 | |
1da177e4 LT |
116 | return 0; |
117 | } | |
9655ad03 | 118 | early_param("mem", early_parse_mem); |
1da177e4 | 119 | |
4bc277ac | 120 | void __init check_for_initrd(void) |
9b7a3785 PM |
121 | { |
122 | #ifdef CONFIG_BLK_DEV_INITRD | |
123 | unsigned long start, end; | |
124 | ||
125 | /* | |
126 | * Check for the rare cases where boot loaders adhere to the boot | |
127 | * ABI. | |
128 | */ | |
129 | if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE) | |
130 | goto disable; | |
131 | ||
132 | start = INITRD_START + __MEMORY_START; | |
133 | end = start + INITRD_SIZE; | |
134 | ||
135 | if (unlikely(end <= start)) | |
136 | goto disable; | |
137 | if (unlikely(start & ~PAGE_MASK)) { | |
138 | pr_err("initrd must be page aligned\n"); | |
139 | goto disable; | |
140 | } | |
141 | ||
901c28c2 NI |
142 | if (unlikely(start < __MEMORY_START)) { |
143 | pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n", | |
144 | start, __MEMORY_START); | |
9b7a3785 PM |
145 | goto disable; |
146 | } | |
147 | ||
95f72d1e | 148 | if (unlikely(end > memblock_end_of_DRAM())) { |
9b7a3785 PM |
149 | pr_err("initrd extends beyond end of memory " |
150 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
95f72d1e | 151 | end, (unsigned long)memblock_end_of_DRAM()); |
9b7a3785 PM |
152 | goto disable; |
153 | } | |
154 | ||
155 | /* | |
25985edc | 156 | * If we got this far in spite of the boot loader's best efforts |
9b7a3785 PM |
157 | * to the contrary, assume we actually have a valid initrd and |
158 | * fix up the root dev. | |
159 | */ | |
160 | ROOT_DEV = Root_RAM0; | |
161 | ||
162 | /* | |
163 | * Address sanitization | |
164 | */ | |
901c28c2 | 165 | initrd_start = (unsigned long)__va(start); |
9b7a3785 PM |
166 | initrd_end = initrd_start + INITRD_SIZE; |
167 | ||
95f72d1e | 168 | memblock_reserve(__pa(initrd_start), INITRD_SIZE); |
9b7a3785 PM |
169 | |
170 | return; | |
171 | ||
172 | disable: | |
173 | pr_info("initrd disabled\n"); | |
174 | initrd_start = initrd_end = 0; | |
175 | #endif | |
176 | } | |
177 | ||
7480e0aa | 178 | #ifndef CONFIG_GENERIC_CALIBRATE_DELAY |
4603f53a | 179 | void calibrate_delay(void) |
cf204fa7 PM |
180 | { |
181 | struct clk *clk = clk_get(NULL, "cpu_clk"); | |
182 | ||
183 | if (IS_ERR(clk)) | |
184 | panic("Need a sane CPU clock definition!"); | |
185 | ||
186 | loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ; | |
187 | ||
188 | printk(KERN_INFO "Calibrating delay loop (skipped)... " | |
189 | "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n", | |
190 | loops_per_jiffy/(500000/HZ), | |
191 | (loops_per_jiffy/(5000/HZ)) % 100, | |
192 | loops_per_jiffy); | |
193 | } | |
7480e0aa | 194 | #endif |
cf204fa7 | 195 | |
0146ba78 MD |
196 | void __init __add_active_range(unsigned int nid, unsigned long start_pfn, |
197 | unsigned long end_pfn) | |
198 | { | |
199 | struct resource *res = &mem_resources[nid]; | |
21823259 | 200 | unsigned long start, end; |
0146ba78 MD |
201 | |
202 | WARN_ON(res->name); /* max one active range per node for now */ | |
203 | ||
21823259 PM |
204 | start = start_pfn << PAGE_SHIFT; |
205 | end = end_pfn << PAGE_SHIFT; | |
206 | ||
0146ba78 | 207 | res->name = "System RAM"; |
21823259 PM |
208 | res->start = start; |
209 | res->end = end - 1; | |
35d98e93 | 210 | res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; |
21823259 | 211 | |
0146ba78 MD |
212 | if (request_resource(&iomem_resource, res)) { |
213 | pr_err("unable to request memory_resource 0x%lx 0x%lx\n", | |
214 | start_pfn, end_pfn); | |
215 | return; | |
216 | } | |
217 | ||
218 | /* | |
41309b7a SH |
219 | * We don't know which RAM region contains kernel data or |
220 | * the reserved crashkernel region, so try it repeatedly | |
221 | * and let the resource manager test it. | |
0146ba78 MD |
222 | */ |
223 | request_resource(res, &code_resource); | |
224 | request_resource(res, &data_resource); | |
225 | request_resource(res, &bss_resource); | |
41309b7a SH |
226 | #ifdef CONFIG_KEXEC |
227 | request_resource(res, &crashk_res); | |
228 | #endif | |
0146ba78 | 229 | |
1da177e4 | 230 | /* |
21823259 PM |
231 | * Also make sure that there is a PMB mapping that covers this |
232 | * range before we attempt to activate it, to avoid reset by MMU. | |
233 | * We can hit this path with NUMA or memory hot-add. | |
1da177e4 | 234 | */ |
21823259 PM |
235 | pmb_bolt_mapping((unsigned long)__va(start), start, end - start, |
236 | PAGE_KERNEL); | |
c601a51a | 237 | |
e7e8de59 TC |
238 | memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn), |
239 | &memblock.memory, nid); | |
01066625 | 240 | } |
01066625 | 241 | |
19d8f84f | 242 | void __init __weak plat_early_device_setup(void) |
87a00dc0 MD |
243 | { |
244 | } | |
245 | ||
03767daa | 246 | #ifdef CONFIG_OF_FLATTREE |
7480e0aa RF |
247 | void __ref sh_fdt_init(phys_addr_t dt_phys) |
248 | { | |
249 | static int done = 0; | |
250 | void *dt_virt; | |
251 | ||
252 | /* Avoid calling an __init function on secondary cpus. */ | |
253 | if (done) return; | |
254 | ||
190fe191 RF |
255 | #ifdef CONFIG_USE_BUILTIN_DTB |
256 | dt_virt = __dtb_start; | |
257 | #else | |
7480e0aa | 258 | dt_virt = phys_to_virt(dt_phys); |
190fe191 | 259 | #endif |
7480e0aa RF |
260 | |
261 | if (!dt_virt || !early_init_dt_scan(dt_virt)) { | |
262 | pr_crit("Error: invalid device tree blob" | |
263 | " at physical address %p\n", (void *)dt_phys); | |
264 | ||
265 | while (true) | |
266 | cpu_relax(); | |
267 | } | |
268 | ||
269 | done = 1; | |
270 | } | |
271 | #endif | |
272 | ||
01066625 PM |
273 | void __init setup_arch(char **cmdline_p) |
274 | { | |
275 | enable_mmu(); | |
276 | ||
01066625 PM |
277 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); |
278 | ||
0105346c PM |
279 | printk(KERN_NOTICE "Boot params:\n" |
280 | "... MOUNT_ROOT_RDONLY - %08lx\n" | |
281 | "... RAMDISK_FLAGS - %08lx\n" | |
282 | "... ORIG_ROOT_DEV - %08lx\n" | |
283 | "... LOADER_TYPE - %08lx\n" | |
284 | "... INITRD_START - %08lx\n" | |
285 | "... INITRD_SIZE - %08lx\n", | |
286 | MOUNT_ROOT_RDONLY, RAMDISK_FLAGS, | |
287 | ORIG_ROOT_DEV, LOADER_TYPE, | |
288 | INITRD_START, INITRD_SIZE); | |
289 | ||
01066625 PM |
290 | #ifdef CONFIG_BLK_DEV_RAM |
291 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
292 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); | |
293 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); | |
294 | #endif | |
295 | ||
296 | if (!MOUNT_ROOT_RDONLY) | |
297 | root_mountflags &= ~MS_RDONLY; | |
298 | init_mm.start_code = (unsigned long) _text; | |
299 | init_mm.end_code = (unsigned long) _etext; | |
300 | init_mm.end_data = (unsigned long) _edata; | |
301 | init_mm.brk = (unsigned long) _end; | |
302 | ||
303 | code_resource.start = virt_to_phys(_text); | |
304 | code_resource.end = virt_to_phys(_etext)-1; | |
305 | data_resource.start = virt_to_phys(_etext); | |
306 | data_resource.end = virt_to_phys(_edata)-1; | |
3d83984e | 307 | bss_resource.start = virt_to_phys(__bss_start); |
363737d6 | 308 | bss_resource.end = virt_to_phys(__bss_stop)-1; |
01066625 | 309 | |
d724a9c9 | 310 | #ifdef CONFIG_CMDLINE_OVERWRITE |
ba36197c PM |
311 | strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line)); |
312 | #else | |
313 | strlcpy(command_line, COMMAND_LINE, sizeof(command_line)); | |
d724a9c9 PM |
314 | #ifdef CONFIG_CMDLINE_EXTEND |
315 | strlcat(command_line, " ", sizeof(command_line)); | |
316 | strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line)); | |
317 | #endif | |
ba36197c | 318 | #endif |
9655ad03 | 319 | |
ba36197c PM |
320 | /* Save unparsed command line copy for /proc/cmdline */ |
321 | memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); | |
9655ad03 PM |
322 | *cmdline_p = command_line; |
323 | ||
01066625 PM |
324 | parse_early_param(); |
325 | ||
87a00dc0 MD |
326 | plat_early_device_setup(); |
327 | ||
9655ad03 | 328 | sh_mv_setup(); |
01066625 | 329 | |
4bc277ac PM |
330 | /* Let earlyprintk output early console messages */ |
331 | early_platform_driver_probe("earlyprintk", 1, 1); | |
dfbb9042 | 332 | |
eb6b6930 RF |
333 | #ifdef CONFIG_OF_FLATTREE |
334 | #ifdef CONFIG_USE_BUILTIN_DTB | |
335 | unflatten_and_copy_device_tree(); | |
336 | #else | |
337 | unflatten_device_tree(); | |
338 | #endif | |
339 | #endif | |
340 | ||
4bc277ac | 341 | paging_init(); |
1da177e4 LT |
342 | |
343 | #ifdef CONFIG_DUMMY_CONSOLE | |
344 | conswitchp = &dummy_con; | |
345 | #endif | |
346 | ||
347 | /* Perform the machine specific initialisation */ | |
2c7834a6 PM |
348 | if (likely(sh_mv.mv_setup)) |
349 | sh_mv.mv_setup(cmdline_p); | |
1da177e4 | 350 | |
0016a126 | 351 | plat_smp_setup(); |
dfbb9042 | 352 | } |
1da177e4 | 353 | |
eb9b9b56 MD |
354 | /* processor boot mode configuration */ |
355 | int generic_mode_pins(void) | |
356 | { | |
357 | pr_warning("generic_mode_pins(): missing mode pin configuration\n"); | |
358 | return 0; | |
359 | } | |
360 | ||
361 | int test_mode_pin(int pin) | |
362 | { | |
0d4fdbb6 | 363 | return sh_mv.mv_mode_pins() & pin; |
eb9b9b56 | 364 | } |