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> |
507fd01d | 47 | #include <asm/platform_early.h> |
1da177e4 | 48 | |
1da177e4 LT |
49 | /* |
50 | * Initialize loops_per_jiffy as 10000000 (1000MIPS). | |
51 | * This value will be used at the very early stage of serial setup. | |
52 | * The bigger value means no problem. | |
53 | */ | |
2d4a73d5 PM |
54 | struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = { |
55 | [0] = { | |
56 | .type = CPU_SH_NONE, | |
e82da214 | 57 | .family = CPU_FAMILY_UNKNOWN, |
2d4a73d5 | 58 | .loops_per_jiffy = 10000000, |
2f98492c | 59 | .phys_bits = MAX_PHYSMEM_BITS, |
2d4a73d5 PM |
60 | }, |
61 | }; | |
62 | EXPORT_SYMBOL(cpu_data); | |
82f81f47 PM |
63 | |
64 | /* | |
65 | * The machine vector. First entry in .machvec.init, or clobbered by | |
66 | * sh_mv= on the command line, prior to .machvec.init teardown. | |
67 | */ | |
fd8f20e8 | 68 | struct sh_machine_vector sh_mv = { .mv_name = "generic", }; |
971ac16d | 69 | EXPORT_SYMBOL(sh_mv); |
82f81f47 | 70 | |
2c7834a6 | 71 | #ifdef CONFIG_VT |
1da177e4 | 72 | struct screen_info screen_info; |
2c7834a6 | 73 | #endif |
1da177e4 | 74 | |
1da177e4 LT |
75 | extern int root_mountflags; |
76 | ||
65463b73 | 77 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
1da177e4 | 78 | #define RAMDISK_PROMPT_FLAG 0x8000 |
65463b73 | 79 | #define RAMDISK_LOAD_FLAG 0x4000 |
1da177e4 | 80 | |
53c82622 | 81 | static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, }; |
1da177e4 | 82 | |
69d1ef4c PM |
83 | static struct resource code_resource = { |
84 | .name = "Kernel code", | |
35d98e93 | 85 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, |
69d1ef4c PM |
86 | }; |
87 | ||
88 | static struct resource data_resource = { | |
89 | .name = "Kernel data", | |
35d98e93 | 90 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, |
69d1ef4c | 91 | }; |
1da177e4 | 92 | |
3d83984e MD |
93 | static struct resource bss_resource = { |
94 | .name = "Kernel bss", | |
35d98e93 | 95 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, |
3d83984e MD |
96 | }; |
97 | ||
98d877c4 PM |
98 | unsigned long memory_start; |
99 | EXPORT_SYMBOL(memory_start); | |
7e5186ea | 100 | unsigned long memory_end = 0; |
98d877c4 | 101 | EXPORT_SYMBOL(memory_end); |
5e2ff328 | 102 | unsigned long memory_limit = 0; |
1da177e4 | 103 | |
0146ba78 MD |
104 | static struct resource mem_resources[MAX_NUMNODES]; |
105 | ||
cd01204b PM |
106 | int l1i_cache_shape, l1d_cache_shape, l2_cache_shape; |
107 | ||
9655ad03 | 108 | static int __init early_parse_mem(char *p) |
1da177e4 | 109 | { |
5e2ff328 PM |
110 | if (!p) |
111 | return 1; | |
1da177e4 | 112 | |
5e2ff328 | 113 | memory_limit = PAGE_ALIGN(memparse(p, &p)); |
80a68a43 | 114 | |
5e2ff328 | 115 | pr_notice("Memory limited to %ldMB\n", memory_limit >> 20); |
2c7834a6 | 116 | |
1da177e4 LT |
117 | return 0; |
118 | } | |
9655ad03 | 119 | early_param("mem", early_parse_mem); |
1da177e4 | 120 | |
4bc277ac | 121 | void __init check_for_initrd(void) |
9b7a3785 PM |
122 | { |
123 | #ifdef CONFIG_BLK_DEV_INITRD | |
124 | unsigned long start, end; | |
125 | ||
126 | /* | |
127 | * Check for the rare cases where boot loaders adhere to the boot | |
128 | * ABI. | |
129 | */ | |
130 | if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE) | |
131 | goto disable; | |
132 | ||
133 | start = INITRD_START + __MEMORY_START; | |
134 | end = start + INITRD_SIZE; | |
135 | ||
136 | if (unlikely(end <= start)) | |
137 | goto disable; | |
138 | if (unlikely(start & ~PAGE_MASK)) { | |
139 | pr_err("initrd must be page aligned\n"); | |
140 | goto disable; | |
141 | } | |
142 | ||
901c28c2 NI |
143 | if (unlikely(start < __MEMORY_START)) { |
144 | pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n", | |
145 | start, __MEMORY_START); | |
9b7a3785 PM |
146 | goto disable; |
147 | } | |
148 | ||
95f72d1e | 149 | if (unlikely(end > memblock_end_of_DRAM())) { |
9b7a3785 PM |
150 | pr_err("initrd extends beyond end of memory " |
151 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", | |
95f72d1e | 152 | end, (unsigned long)memblock_end_of_DRAM()); |
9b7a3785 PM |
153 | goto disable; |
154 | } | |
155 | ||
156 | /* | |
25985edc | 157 | * If we got this far in spite of the boot loader's best efforts |
9b7a3785 PM |
158 | * to the contrary, assume we actually have a valid initrd and |
159 | * fix up the root dev. | |
160 | */ | |
161 | ROOT_DEV = Root_RAM0; | |
162 | ||
163 | /* | |
164 | * Address sanitization | |
165 | */ | |
901c28c2 | 166 | initrd_start = (unsigned long)__va(start); |
9b7a3785 PM |
167 | initrd_end = initrd_start + INITRD_SIZE; |
168 | ||
95f72d1e | 169 | memblock_reserve(__pa(initrd_start), INITRD_SIZE); |
9b7a3785 PM |
170 | |
171 | return; | |
172 | ||
173 | disable: | |
174 | pr_info("initrd disabled\n"); | |
175 | initrd_start = initrd_end = 0; | |
176 | #endif | |
177 | } | |
178 | ||
7480e0aa | 179 | #ifndef CONFIG_GENERIC_CALIBRATE_DELAY |
4603f53a | 180 | void calibrate_delay(void) |
cf204fa7 PM |
181 | { |
182 | struct clk *clk = clk_get(NULL, "cpu_clk"); | |
183 | ||
184 | if (IS_ERR(clk)) | |
185 | panic("Need a sane CPU clock definition!"); | |
186 | ||
187 | loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ; | |
188 | ||
189 | printk(KERN_INFO "Calibrating delay loop (skipped)... " | |
190 | "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n", | |
191 | loops_per_jiffy/(500000/HZ), | |
192 | (loops_per_jiffy/(5000/HZ)) % 100, | |
193 | loops_per_jiffy); | |
194 | } | |
7480e0aa | 195 | #endif |
cf204fa7 | 196 | |
0146ba78 MD |
197 | void __init __add_active_range(unsigned int nid, unsigned long start_pfn, |
198 | unsigned long end_pfn) | |
199 | { | |
200 | struct resource *res = &mem_resources[nid]; | |
21823259 | 201 | unsigned long start, end; |
0146ba78 MD |
202 | |
203 | WARN_ON(res->name); /* max one active range per node for now */ | |
204 | ||
21823259 PM |
205 | start = start_pfn << PAGE_SHIFT; |
206 | end = end_pfn << PAGE_SHIFT; | |
207 | ||
0146ba78 | 208 | res->name = "System RAM"; |
21823259 PM |
209 | res->start = start; |
210 | res->end = end - 1; | |
35d98e93 | 211 | res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; |
21823259 | 212 | |
0146ba78 MD |
213 | if (request_resource(&iomem_resource, res)) { |
214 | pr_err("unable to request memory_resource 0x%lx 0x%lx\n", | |
215 | start_pfn, end_pfn); | |
216 | return; | |
217 | } | |
218 | ||
219 | /* | |
41309b7a SH |
220 | * We don't know which RAM region contains kernel data or |
221 | * the reserved crashkernel region, so try it repeatedly | |
222 | * and let the resource manager test it. | |
0146ba78 MD |
223 | */ |
224 | request_resource(res, &code_resource); | |
225 | request_resource(res, &data_resource); | |
226 | request_resource(res, &bss_resource); | |
41309b7a SH |
227 | #ifdef CONFIG_KEXEC |
228 | request_resource(res, &crashk_res); | |
229 | #endif | |
0146ba78 | 230 | |
1da177e4 | 231 | /* |
21823259 PM |
232 | * Also make sure that there is a PMB mapping that covers this |
233 | * range before we attempt to activate it, to avoid reset by MMU. | |
234 | * We can hit this path with NUMA or memory hot-add. | |
1da177e4 | 235 | */ |
21823259 PM |
236 | pmb_bolt_mapping((unsigned long)__va(start), start, end - start, |
237 | PAGE_KERNEL); | |
c601a51a | 238 | |
e7e8de59 TC |
239 | memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn), |
240 | &memblock.memory, nid); | |
01066625 | 241 | } |
01066625 | 242 | |
19d8f84f | 243 | void __init __weak plat_early_device_setup(void) |
87a00dc0 MD |
244 | { |
245 | } | |
246 | ||
6cba6555 | 247 | #ifdef CONFIG_OF_EARLY_FLATTREE |
7480e0aa RF |
248 | void __ref sh_fdt_init(phys_addr_t dt_phys) |
249 | { | |
250 | static int done = 0; | |
251 | void *dt_virt; | |
252 | ||
253 | /* Avoid calling an __init function on secondary cpus. */ | |
254 | if (done) return; | |
255 | ||
190fe191 RF |
256 | #ifdef CONFIG_USE_BUILTIN_DTB |
257 | dt_virt = __dtb_start; | |
258 | #else | |
7480e0aa | 259 | dt_virt = phys_to_virt(dt_phys); |
190fe191 | 260 | #endif |
7480e0aa RF |
261 | |
262 | if (!dt_virt || !early_init_dt_scan(dt_virt)) { | |
263 | pr_crit("Error: invalid device tree blob" | |
264 | " at physical address %p\n", (void *)dt_phys); | |
265 | ||
266 | while (true) | |
267 | cpu_relax(); | |
268 | } | |
269 | ||
270 | done = 1; | |
271 | } | |
272 | #endif | |
273 | ||
01066625 PM |
274 | void __init setup_arch(char **cmdline_p) |
275 | { | |
276 | enable_mmu(); | |
277 | ||
01066625 PM |
278 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); |
279 | ||
0105346c PM |
280 | printk(KERN_NOTICE "Boot params:\n" |
281 | "... MOUNT_ROOT_RDONLY - %08lx\n" | |
282 | "... RAMDISK_FLAGS - %08lx\n" | |
283 | "... ORIG_ROOT_DEV - %08lx\n" | |
284 | "... LOADER_TYPE - %08lx\n" | |
285 | "... INITRD_START - %08lx\n" | |
286 | "... INITRD_SIZE - %08lx\n", | |
287 | MOUNT_ROOT_RDONLY, RAMDISK_FLAGS, | |
288 | ORIG_ROOT_DEV, LOADER_TYPE, | |
289 | INITRD_START, INITRD_SIZE); | |
290 | ||
01066625 PM |
291 | #ifdef CONFIG_BLK_DEV_RAM |
292 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; | |
01066625 PM |
293 | #endif |
294 | ||
295 | if (!MOUNT_ROOT_RDONLY) | |
296 | root_mountflags &= ~MS_RDONLY; | |
f7cce365 | 297 | setup_initial_init_mm(_text, _etext, _edata, _end); |
01066625 PM |
298 | |
299 | code_resource.start = virt_to_phys(_text); | |
300 | code_resource.end = virt_to_phys(_etext)-1; | |
301 | data_resource.start = virt_to_phys(_etext); | |
302 | data_resource.end = virt_to_phys(_edata)-1; | |
3d83984e | 303 | bss_resource.start = virt_to_phys(__bss_start); |
363737d6 | 304 | bss_resource.end = virt_to_phys(__bss_stop)-1; |
01066625 | 305 | |
d724a9c9 | 306 | #ifdef CONFIG_CMDLINE_OVERWRITE |
ba36197c PM |
307 | strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line)); |
308 | #else | |
309 | strlcpy(command_line, COMMAND_LINE, sizeof(command_line)); | |
d724a9c9 PM |
310 | #ifdef CONFIG_CMDLINE_EXTEND |
311 | strlcat(command_line, " ", sizeof(command_line)); | |
312 | strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line)); | |
313 | #endif | |
ba36197c | 314 | #endif |
9655ad03 | 315 | |
ba36197c PM |
316 | /* Save unparsed command line copy for /proc/cmdline */ |
317 | memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); | |
9655ad03 PM |
318 | *cmdline_p = command_line; |
319 | ||
01066625 PM |
320 | parse_early_param(); |
321 | ||
87a00dc0 MD |
322 | plat_early_device_setup(); |
323 | ||
9655ad03 | 324 | sh_mv_setup(); |
01066625 | 325 | |
4bc277ac | 326 | /* Let earlyprintk output early console messages */ |
201e9109 | 327 | sh_early_platform_driver_probe("earlyprintk", 1, 1); |
dfbb9042 | 328 | |
6cba6555 | 329 | #ifdef CONFIG_OF_EARLY_FLATTREE |
eb6b6930 RF |
330 | #ifdef CONFIG_USE_BUILTIN_DTB |
331 | unflatten_and_copy_device_tree(); | |
332 | #else | |
333 | unflatten_device_tree(); | |
334 | #endif | |
335 | #endif | |
336 | ||
4bc277ac | 337 | paging_init(); |
1da177e4 | 338 | |
1da177e4 | 339 | /* Perform the machine specific initialisation */ |
2c7834a6 PM |
340 | if (likely(sh_mv.mv_setup)) |
341 | sh_mv.mv_setup(cmdline_p); | |
1da177e4 | 342 | |
0016a126 | 343 | plat_smp_setup(); |
dfbb9042 | 344 | } |
1da177e4 | 345 | |
eb9b9b56 MD |
346 | /* processor boot mode configuration */ |
347 | int generic_mode_pins(void) | |
348 | { | |
6d80f20c | 349 | pr_warn("generic_mode_pins(): missing mode pin configuration\n"); |
eb9b9b56 MD |
350 | return 0; |
351 | } | |
352 | ||
353 | int test_mode_pin(int pin) | |
354 | { | |
0d4fdbb6 | 355 | return sh_mv.mv_mode_pins() & pin; |
eb9b9b56 | 356 | } |