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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 1995 Linus Torvalds | |
7 | * Copyright (C) 1995 Waldorf Electronics | |
8 | * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle | |
9 | * Copyright (C) 1996 Stoned Elipot | |
10 | * Copyright (C) 1999 Silicon Graphics, Inc. | |
70342287 | 11 | * Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki |
1da177e4 | 12 | */ |
1da177e4 LT |
13 | #include <linux/init.h> |
14 | #include <linux/ioport.h> | |
73bc256d | 15 | #include <linux/export.h> |
894673ee | 16 | #include <linux/screen_info.h> |
9d15ffc8 | 17 | #include <linux/memblock.h> |
1da177e4 | 18 | #include <linux/initrd.h> |
1da177e4 LT |
19 | #include <linux/root_dev.h> |
20 | #include <linux/highmem.h> | |
21 | #include <linux/console.h> | |
22a9835c | 22 | #include <linux/pfn.h> |
6312e0ee | 23 | #include <linux/debugfs.h> |
7aa1c8f4 | 24 | #include <linux/kexec.h> |
4d9f77d2 | 25 | #include <linux/sizes.h> |
f4649382 | 26 | #include <linux/device.h> |
0b1abd1f | 27 | #include <linux/dma-map-ops.h> |
8f4703aa | 28 | #include <linux/decompress/generic.h> |
73346081 | 29 | #include <linux/of_fdt.h> |
be8fa1cb | 30 | #include <linux/dmi.h> |
b306c5f5 | 31 | #include <linux/crash_dump.h> |
1da177e4 LT |
32 | |
33 | #include <asm/addrspace.h> | |
34 | #include <asm/bootinfo.h> | |
20d60d99 | 35 | #include <asm/bugs.h> |
ec74e361 | 36 | #include <asm/cache.h> |
e934945d | 37 | #include <asm/cdmm.h> |
1da177e4 | 38 | #include <asm/cpu.h> |
75dcfc1d | 39 | #include <asm/debug.h> |
1da177e4 LT |
40 | #include <asm/sections.h> |
41 | #include <asm/setup.h> | |
87353d8a | 42 | #include <asm/smp-ops.h> |
f2ffa5ab | 43 | #include <asm/prom.h> |
1da177e4 | 44 | |
87db537d | 45 | #ifdef CONFIG_MIPS_ELF_APPENDED_DTB |
9ae31e2a | 46 | char __section(".appended_dtb") __appended_dtb[0x100000]; |
87db537d AK |
47 | #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */ |
48 | ||
ec74e361 | 49 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
50 | |
51 | EXPORT_SYMBOL(cpu_data); | |
52 | ||
53 | #ifdef CONFIG_VT | |
54 | struct screen_info screen_info; | |
55 | #endif | |
56 | ||
1da177e4 LT |
57 | /* |
58 | * Setup information | |
59 | * | |
60 | * These are initialized so they are in the .data section | |
61 | */ | |
ec74e361 | 62 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
1da177e4 LT |
63 | |
64 | EXPORT_SYMBOL(mips_machtype); | |
1da177e4 | 65 | |
6acc7d48 DV |
66 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
67 | char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; | |
68 | ||
69 | #ifdef CONFIG_CMDLINE_BOOL | |
9dd422f6 | 70 | static const char builtin_cmdline[] __initconst = CONFIG_CMDLINE; |
b7340422 PB |
71 | #else |
72 | static const char builtin_cmdline[] __initconst = ""; | |
6acc7d48 | 73 | #endif |
1da177e4 LT |
74 | |
75 | /* | |
76 | * mips_io_port_base is the begin of the address space to which x86 style | |
77 | * I/O ports are mapped. | |
78 | */ | |
12051b31 | 79 | unsigned long mips_io_port_base = -1; |
1da177e4 LT |
80 | EXPORT_SYMBOL(mips_io_port_base); |
81 | ||
1da177e4 LT |
82 | static struct resource code_resource = { .name = "Kernel code", }; |
83 | static struct resource data_resource = { .name = "Kernel data", }; | |
e0c5f36b | 84 | static struct resource bss_resource = { .name = "Kernel bss", }; |
1da177e4 | 85 | |
d4d3ef8b JH |
86 | unsigned long __kaslr_offset __ro_after_init; |
87 | EXPORT_SYMBOL(__kaslr_offset); | |
88 | ||
4d9f77d2 JC |
89 | static void *detect_magic __initdata = detect_memory_region; |
90 | ||
6c359eb1 PB |
91 | #ifdef CONFIG_MIPS_AUTO_PFN_OFFSET |
92 | unsigned long ARCH_PFN_OFFSET; | |
93 | EXPORT_SYMBOL(ARCH_PFN_OFFSET); | |
94 | #endif | |
95 | ||
15d45cce | 96 | void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max) |
4d9f77d2 JC |
97 | { |
98 | void *dm = &detect_magic; | |
15d45cce | 99 | phys_addr_t size; |
4d9f77d2 JC |
100 | |
101 | for (size = sz_min; size < sz_max; size <<= 1) { | |
102 | if (!memcmp(dm, dm + size, sizeof(detect_magic))) | |
103 | break; | |
104 | } | |
105 | ||
106 | pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n", | |
107 | ((unsigned long long) size) / SZ_1M, | |
108 | (unsigned long long) start, | |
109 | ((unsigned long long) sz_min) / SZ_1M, | |
110 | ((unsigned long long) sz_max) / SZ_1M); | |
111 | ||
e7ae8d17 | 112 | memblock_add(start, size); |
4d9f77d2 JC |
113 | } |
114 | ||
d2043ca8 FBH |
115 | /* |
116 | * Manage initrd | |
117 | */ | |
118 | #ifdef CONFIG_BLK_DEV_INITRD | |
119 | ||
a09fc446 | 120 | static int __init rd_start_early(char *p) |
1da177e4 | 121 | { |
a09fc446 | 122 | unsigned long start = memparse(p, &p); |
1da177e4 | 123 | |
875d43e7 | 124 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
125 | /* Guess if the sign extension was forgotten by bootloader */ |
126 | if (start < XKPHYS) | |
127 | start = (int)start; | |
1da177e4 | 128 | #endif |
a09fc446 FBH |
129 | initrd_start = start; |
130 | initrd_end += start; | |
a09fc446 FBH |
131 | return 0; |
132 | } | |
133 | early_param("rd_start", rd_start_early); | |
134 | ||
135 | static int __init rd_size_early(char *p) | |
136 | { | |
137 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
138 | return 0; |
139 | } | |
a09fc446 | 140 | early_param("rd_size", rd_size_early); |
1da177e4 | 141 | |
a7837b76 | 142 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
143 | static unsigned long __init init_initrd(void) |
144 | { | |
a7837b76 | 145 | unsigned long end; |
d2043ca8 | 146 | |
d2043ca8 | 147 | /* |
a09fc446 FBH |
148 | * Board specific code or command line parser should have |
149 | * already set up initrd_start and initrd_end. In these cases | |
150 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 151 | */ |
32028f1f | 152 | if (!initrd_start || initrd_end <= initrd_start) |
a7837b76 | 153 | goto disable; |
a7837b76 | 154 | |
a7837b76 | 155 | if (initrd_start & ~PAGE_MASK) { |
a64ae7a2 | 156 | pr_err("initrd start must be page aligned\n"); |
a7837b76 | 157 | goto disable; |
d2043ca8 | 158 | } |
a7837b76 | 159 | if (initrd_start < PAGE_OFFSET) { |
a64ae7a2 | 160 | pr_err("initrd start < PAGE_OFFSET\n"); |
a7837b76 FBH |
161 | goto disable; |
162 | } | |
163 | ||
164 | /* | |
165 | * Sanitize initrd addresses. For example firmware | |
166 | * can't guess if they need to pass them through | |
167 | * 64-bits values if the kernel has been built in pure | |
168 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
169 | * addresses now, so the code can now safely use __pa(). | |
170 | */ | |
171 | end = __pa(initrd_end); | |
172 | initrd_end = (unsigned long)__va(end); | |
173 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
174 | ||
175 | ROOT_DEV = Root_RAM0; | |
176 | return PFN_UP(end); | |
177 | disable: | |
178 | initrd_start = 0; | |
179 | initrd_end = 0; | |
180 | return 0; | |
d2043ca8 FBH |
181 | } |
182 | ||
8f4703aa AJ |
183 | /* In some conditions (e.g. big endian bootloader with a little endian |
184 | kernel), the initrd might appear byte swapped. Try to detect this and | |
185 | byte swap it if needed. */ | |
186 | static void __init maybe_bswap_initrd(void) | |
187 | { | |
188 | #if defined(CONFIG_CPU_CAVIUM_OCTEON) | |
189 | u64 buf; | |
190 | ||
191 | /* Check for CPIO signature */ | |
192 | if (!memcmp((void *)initrd_start, "070701", 6)) | |
193 | return; | |
194 | ||
195 | /* Check for compressed initrd */ | |
196 | if (decompress_method((unsigned char *)initrd_start, 8, NULL)) | |
197 | return; | |
198 | ||
199 | /* Try again with a byte swapped header */ | |
200 | buf = swab64p((u64 *)initrd_start); | |
201 | if (!memcmp(&buf, "070701", 6) || | |
202 | decompress_method((unsigned char *)(&buf), 8, NULL)) { | |
203 | unsigned long i; | |
204 | ||
205 | pr_info("Byteswapped initrd detected\n"); | |
206 | for (i = initrd_start; i < ALIGN(initrd_end, 8); i += 8) | |
207 | swab64s((u64 *)i); | |
208 | } | |
209 | #endif | |
210 | } | |
211 | ||
d2043ca8 FBH |
212 | static void __init finalize_initrd(void) |
213 | { | |
214 | unsigned long size = initrd_end - initrd_start; | |
215 | ||
216 | if (size == 0) { | |
217 | printk(KERN_INFO "Initrd not found or empty"); | |
218 | goto disable; | |
219 | } | |
d4df6d4e | 220 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
a64ae7a2 | 221 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
d2043ca8 FBH |
222 | goto disable; |
223 | } | |
224 | ||
8f4703aa AJ |
225 | maybe_bswap_initrd(); |
226 | ||
bcec54bf | 227 | memblock_reserve(__pa(initrd_start), size); |
d2043ca8 FBH |
228 | initrd_below_start_ok = 1; |
229 | ||
a64ae7a2 MC |
230 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
231 | initrd_start, size); | |
d2043ca8 FBH |
232 | return; |
233 | disable: | |
a64ae7a2 | 234 | printk(KERN_CONT " - disabling initrd\n"); |
d2043ca8 FBH |
235 | initrd_start = 0; |
236 | initrd_end = 0; | |
237 | } | |
238 | ||
239 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
240 | ||
9ba126cf RB |
241 | static unsigned long __init init_initrd(void) |
242 | { | |
243 | return 0; | |
244 | } | |
245 | ||
d2043ca8 FBH |
246 | #define finalize_initrd() do {} while (0) |
247 | ||
248 | #endif | |
249 | ||
b6f1f0de FBH |
250 | /* |
251 | * Initialize the bootmem allocator. It also setup initrd related data | |
252 | * if needed. | |
253 | */ | |
268a2d60 | 254 | #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON64) && defined(CONFIG_NUMA)) |
d2043ca8 | 255 | |
b6f1f0de | 256 | static void __init bootmem_init(void) |
1da177e4 | 257 | { |
d2043ca8 FBH |
258 | init_initrd(); |
259 | finalize_initrd(); | |
260 | } | |
261 | ||
262 | #else /* !CONFIG_SGI_IP27 */ | |
263 | ||
264 | static void __init bootmem_init(void) | |
265 | { | |
a94e4f24 | 266 | phys_addr_t ramstart, ramend; |
61a2f1ae TB |
267 | unsigned long start, end; |
268 | int i; | |
a94e4f24 JY |
269 | |
270 | ramstart = memblock_start_of_DRAM(); | |
271 | ramend = memblock_end_of_DRAM(); | |
1da177e4 LT |
272 | |
273 | /* | |
f9a7febd GU |
274 | * Sanity check any INITRD first. We don't take it into account |
275 | * for bootmem setup initially, rely on the end-of-kernel-code | |
276 | * as our memory range starting point. Once bootmem is inited we | |
277 | * will reserve the area used for the initrd. | |
1da177e4 | 278 | */ |
f9a7febd | 279 | init_initrd(); |
1da177e4 | 280 | |
b93ddc4f SS |
281 | /* Reserve memory occupied by kernel. */ |
282 | memblock_reserve(__pa_symbol(&_text), | |
283 | __pa_symbol(&_end) - __pa_symbol(&_text)); | |
bcec54bf | 284 | |
a94e4f24 JY |
285 | /* max_low_pfn is not a number of pages but the end pfn of low mem */ |
286 | ||
287 | #ifdef CONFIG_MIPS_AUTO_PFN_OFFSET | |
288 | ARCH_PFN_OFFSET = PFN_UP(ramstart); | |
289 | #else | |
db84dc61 | 290 | /* |
a94e4f24 | 291 | * Reserve any memory between the start of RAM and PHYS_OFFSET |
db84dc61 | 292 | */ |
a94e4f24 | 293 | if (ramstart > PHYS_OFFSET) |
66b416ee | 294 | memblock_reserve(PHYS_OFFSET, ramstart - PHYS_OFFSET); |
1da177e4 | 295 | |
a94e4f24 JY |
296 | if (PFN_UP(ramstart) > ARCH_PFN_OFFSET) { |
297 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", | |
298 | (unsigned long)((PFN_UP(ramstart) - ARCH_PFN_OFFSET) * sizeof(struct page)), | |
299 | (unsigned long)(PFN_UP(ramstart) - ARCH_PFN_OFFSET)); | |
300 | } | |
301 | #endif | |
1da177e4 | 302 | |
a94e4f24 JY |
303 | min_low_pfn = ARCH_PFN_OFFSET; |
304 | max_pfn = PFN_DOWN(ramend); | |
61a2f1ae | 305 | for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, NULL) { |
16a767ec JH |
306 | /* |
307 | * Skip highmem here so we get an accurate max_low_pfn if low | |
308 | * memory stops short of high memory. | |
309 | * If the region overlaps HIGHMEM_START, end is clipped so | |
310 | * max_pfn excludes the highmem portion. | |
311 | */ | |
312 | if (start >= PFN_DOWN(HIGHMEM_START)) | |
313 | continue; | |
314 | if (end > PFN_DOWN(HIGHMEM_START)) | |
315 | end = PFN_DOWN(HIGHMEM_START); | |
db84dc61 FBH |
316 | if (end > max_low_pfn) |
317 | max_low_pfn = end; | |
1da177e4 LT |
318 | } |
319 | ||
6c359eb1 PB |
320 | if (min_low_pfn >= max_low_pfn) |
321 | panic("Incorrect memory mapping !!!"); | |
322 | ||
a94e4f24 | 323 | if (max_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
324 | #ifdef CONFIG_HIGHMEM |
325 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
a94e4f24 JY |
326 | highend_pfn = max_pfn; |
327 | #else | |
db84dc61 | 328 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
a94e4f24 | 329 | max_pfn = max_low_pfn; |
6ea3ba6f | 330 | #endif |
a94e4f24 | 331 | } |
43064c0c | 332 | |
d2043ca8 FBH |
333 | /* |
334 | * Reserve initrd memory if needed. | |
335 | */ | |
336 | finalize_initrd(); | |
1da177e4 LT |
337 | } |
338 | ||
d2043ca8 FBH |
339 | #endif /* CONFIG_SGI_IP27 */ |
340 | ||
982f6ffe | 341 | static int usermem __initdata; |
a09fc446 FBH |
342 | |
343 | static int __init early_parse_mem(char *p) | |
344 | { | |
ad8f723a | 345 | phys_addr_t start, size; |
a09fc446 FBH |
346 | |
347 | /* | |
348 | * If a user specifies memory size, we | |
349 | * blow away any automatically generated | |
350 | * size. | |
351 | */ | |
352 | if (usermem == 0) { | |
a09fc446 | 353 | usermem = 1; |
a94e4f24 JY |
354 | memblock_remove(memblock_start_of_DRAM(), |
355 | memblock_end_of_DRAM() - memblock_start_of_DRAM()); | |
70342287 | 356 | } |
a09fc446 FBH |
357 | start = 0; |
358 | size = memparse(p, &p); | |
359 | if (*p == '@') | |
360 | start = memparse(p + 1, &p); | |
361 | ||
e7ae8d17 | 362 | memblock_add(start, size); |
73fbc1eb | 363 | |
a09fc446 FBH |
364 | return 0; |
365 | } | |
366 | early_param("mem", early_parse_mem); | |
2925aba4 | 367 | |
296a7624 MD |
368 | static int __init early_parse_memmap(char *p) |
369 | { | |
370 | char *oldp; | |
371 | u64 start_at, mem_size; | |
372 | ||
373 | if (!p) | |
374 | return -EINVAL; | |
375 | ||
376 | if (!strncmp(p, "exactmap", 8)) { | |
377 | pr_err("\"memmap=exactmap\" invalid on MIPS\n"); | |
378 | return 0; | |
379 | } | |
380 | ||
381 | oldp = p; | |
382 | mem_size = memparse(p, &p); | |
383 | if (p == oldp) | |
384 | return -EINVAL; | |
385 | ||
386 | if (*p == '@') { | |
387 | start_at = memparse(p+1, &p); | |
e7ae8d17 | 388 | memblock_add(start_at, mem_size); |
296a7624 MD |
389 | } else if (*p == '#') { |
390 | pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on MIPS\n"); | |
391 | return -EINVAL; | |
392 | } else if (*p == '$') { | |
393 | start_at = memparse(p+1, &p); | |
e7ae8d17 TB |
394 | memblock_add(start_at, mem_size); |
395 | memblock_reserve(start_at, mem_size); | |
296a7624 MD |
396 | } else { |
397 | pr_err("\"memmap\" invalid format!\n"); | |
398 | return -EINVAL; | |
399 | } | |
400 | ||
401 | if (*p == '\0') { | |
402 | usermem = 1; | |
403 | return 0; | |
404 | } else | |
405 | return -EINVAL; | |
406 | } | |
407 | early_param("memmap", early_parse_memmap); | |
408 | ||
b306c5f5 | 409 | static void __init mips_reserve_vmcore(void) |
4893fc88 | 410 | { |
b306c5f5 | 411 | #ifdef CONFIG_PROC_VMCORE |
b10d6bca MR |
412 | phys_addr_t start, end; |
413 | u64 i; | |
4893fc88 | 414 | |
b306c5f5 JH |
415 | if (!elfcorehdr_size) { |
416 | for_each_mem_range(i, &start, &end) { | |
417 | if (elfcorehdr_addr >= start && elfcorehdr_addr < end) { | |
418 | /* | |
419 | * Reserve from the elf core header to the end of | |
420 | * the memory segment, that should all be kdump | |
421 | * reserved memory. | |
422 | */ | |
423 | elfcorehdr_size = end - elfcorehdr_addr; | |
424 | break; | |
425 | } | |
4893fc88 CM |
426 | } |
427 | } | |
b306c5f5 JH |
428 | |
429 | pr_info("Reserving %ldKB of memory at %ldKB for kdump\n", | |
430 | (unsigned long)elfcorehdr_size >> 10, (unsigned long)elfcorehdr_addr >> 10); | |
431 | ||
432 | memblock_reserve(elfcorehdr_addr, elfcorehdr_size); | |
4893fc88 | 433 | #endif |
b306c5f5 | 434 | } |
4893fc88 | 435 | |
c2882b7f | 436 | #ifdef CONFIG_KEXEC |
26262396 YT |
437 | |
438 | /* 64M alignment for crash kernel regions */ | |
439 | #define CRASH_ALIGN SZ_64M | |
440 | #define CRASH_ADDR_MAX SZ_512M | |
441 | ||
c2882b7f PM |
442 | static void __init mips_parse_crashkernel(void) |
443 | { | |
444 | unsigned long long total_mem; | |
445 | unsigned long long crash_size, crash_base; | |
446 | int ret; | |
447 | ||
a94e4f24 | 448 | total_mem = memblock_phys_mem_size(); |
c2882b7f PM |
449 | ret = parse_crashkernel(boot_command_line, total_mem, |
450 | &crash_size, &crash_base); | |
451 | if (ret != 0 || crash_size <= 0) | |
452 | return; | |
453 | ||
26262396 | 454 | if (crash_base <= 0) { |
a7259df7 MR |
455 | crash_base = memblock_phys_alloc_range(crash_size, CRASH_ALIGN, |
456 | CRASH_ALIGN, | |
457 | CRASH_ADDR_MAX); | |
26262396 YT |
458 | if (!crash_base) { |
459 | pr_warn("crashkernel reservation failed - No suitable area found.\n"); | |
460 | return; | |
461 | } | |
462 | } else { | |
463 | unsigned long long start; | |
464 | ||
a7259df7 MR |
465 | start = memblock_phys_alloc_range(crash_size, 1, |
466 | crash_base, | |
467 | crash_base + crash_size); | |
26262396 YT |
468 | if (start != crash_base) { |
469 | pr_warn("Invalid memory region reserved for crash kernel\n"); | |
470 | return; | |
471 | } | |
a8f108d7 MN |
472 | } |
473 | ||
c2882b7f PM |
474 | crashk_res.start = crash_base; |
475 | crashk_res.end = crash_base + crash_size - 1; | |
476 | } | |
477 | ||
478 | static void __init request_crashkernel(struct resource *res) | |
479 | { | |
480 | int ret; | |
481 | ||
269aa43a MN |
482 | if (crashk_res.start == crashk_res.end) |
483 | return; | |
484 | ||
c2882b7f PM |
485 | ret = request_resource(res, &crashk_res); |
486 | if (!ret) | |
487 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", | |
ecb98379 | 488 | (unsigned long)(resource_size(&crashk_res) >> 20), |
c2882b7f PM |
489 | (unsigned long)(crashk_res.start >> 20)); |
490 | } | |
491 | #else /* !defined(CONFIG_KEXEC) */ | |
492 | static void __init mips_parse_crashkernel(void) | |
493 | { | |
494 | } | |
495 | ||
496 | static void __init request_crashkernel(struct resource *res) | |
497 | { | |
498 | } | |
499 | #endif /* !defined(CONFIG_KEXEC) */ | |
500 | ||
a94e4f24 JY |
501 | static void __init check_kernel_sections_mem(void) |
502 | { | |
d121f125 AS |
503 | phys_addr_t start = __pa_symbol(&_text); |
504 | phys_addr_t size = __pa_symbol(&_end) - start; | |
a94e4f24 JY |
505 | |
506 | if (!memblock_is_region_memory(start, size)) { | |
507 | pr_info("Kernel sections are not in the memory maps\n"); | |
508 | memblock_add(start, size); | |
509 | } | |
510 | } | |
511 | ||
7784cac6 PB |
512 | static void __init bootcmdline_append(const char *s, size_t max) |
513 | { | |
514 | if (!s[0] || !max) | |
515 | return; | |
516 | ||
517 | if (boot_command_line[0]) | |
518 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); | |
519 | ||
520 | strlcat(boot_command_line, s, max); | |
521 | } | |
522 | ||
97272776 PB |
523 | #ifdef CONFIG_OF_EARLY_FLATTREE |
524 | ||
7784cac6 PB |
525 | static int __init bootcmdline_scan_chosen(unsigned long node, const char *uname, |
526 | int depth, void *data) | |
527 | { | |
528 | bool *dt_bootargs = data; | |
529 | const char *p; | |
530 | int l; | |
531 | ||
532 | if (depth != 1 || !data || | |
533 | (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0)) | |
534 | return 0; | |
535 | ||
536 | p = of_get_flat_dt_prop(node, "bootargs", &l); | |
537 | if (p != NULL && l > 0) { | |
538 | bootcmdline_append(p, min(l, COMMAND_LINE_SIZE)); | |
539 | *dt_bootargs = true; | |
540 | } | |
541 | ||
542 | return 1; | |
543 | } | |
544 | ||
97272776 PB |
545 | #endif /* CONFIG_OF_EARLY_FLATTREE */ |
546 | ||
bd6e3898 | 547 | static void __init bootcmdline_init(void) |
7784cac6 PB |
548 | { |
549 | bool dt_bootargs = false; | |
550 | ||
551 | /* | |
552 | * If CMDLINE_OVERRIDE is enabled then initializing the command line is | |
553 | * trivial - we simply use the built-in command line unconditionally & | |
554 | * unmodified. | |
555 | */ | |
556 | if (IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) { | |
557 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
558 | return; | |
559 | } | |
560 | ||
561 | /* | |
562 | * If the user specified a built-in command line & | |
563 | * MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is | |
564 | * prepended to arguments from the bootloader or DT so we'll copy them | |
565 | * to the start of boot_command_line here. Otherwise, empty | |
566 | * boot_command_line to undo anything early_init_dt_scan_chosen() did. | |
567 | */ | |
568 | if (IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)) | |
569 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
570 | else | |
571 | boot_command_line[0] = 0; | |
572 | ||
97272776 | 573 | #ifdef CONFIG_OF_EARLY_FLATTREE |
7784cac6 PB |
574 | /* |
575 | * If we're configured to take boot arguments from DT, look for those | |
576 | * now. | |
577 | */ | |
8e029eb0 PC |
578 | if (IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) || |
579 | IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND)) | |
7784cac6 | 580 | of_scan_flat_dt(bootcmdline_scan_chosen, &dt_bootargs); |
97272776 | 581 | #endif |
7784cac6 PB |
582 | |
583 | /* | |
584 | * If we didn't get any arguments from DT (regardless of whether that's | |
585 | * because we weren't configured to look for them, or because we looked | |
586 | * & found none) then we'll take arguments from the bootloader. | |
587 | * plat_mem_setup() should have filled arcs_cmdline with arguments from | |
588 | * the bootloader. | |
589 | */ | |
590 | if (IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) || !dt_bootargs) | |
591 | bootcmdline_append(arcs_cmdline, COMMAND_LINE_SIZE); | |
592 | ||
593 | /* | |
594 | * If the user specified a built-in command line & we didn't already | |
595 | * prepend it, we append it to boot_command_line here. | |
596 | */ | |
597 | if (IS_ENABLED(CONFIG_CMDLINE_BOOL) && | |
598 | !IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND)) | |
599 | bootcmdline_append(builtin_cmdline, COMMAND_LINE_SIZE); | |
600 | } | |
2024972e | 601 | |
52c985ac PB |
602 | /* |
603 | * arch_mem_init - initialize memory management subsystem | |
604 | * | |
605 | * o plat_mem_setup() detects the memory configuration and will record detected | |
e7ae8d17 | 606 | * memory areas using memblock_add. |
52c985ac PB |
607 | * |
608 | * At this stage the memory configuration of the system is known to the | |
609 | * kernel but generic memory management system is still entirely uninitialized. | |
610 | * | |
611 | * o bootmem_init() | |
612 | * o sparse_init() | |
613 | * o paging_init() | |
614 | * o dma_contiguous_reserve() | |
615 | * | |
616 | * At this stage the bootmem allocator is ready to use. | |
617 | * | |
618 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
619 | * This was rather impractical because it meant plat_mem_setup had to | |
620 | * get away without any kind of memory allocator. To keep old code from | |
621 | * breaking plat_setup was just renamed to plat_mem_setup and a second platform | |
622 | * initialization hook for anything else was introduced. | |
623 | */ | |
d3ff9338 CM |
624 | static void __init arch_mem_init(char **cmdline_p) |
625 | { | |
951d223c PB |
626 | /* call board setup routine */ |
627 | plat_mem_setup(); | |
25517ed4 | 628 | memblock_set_bottom_up(true); |
951d223c | 629 | |
bd6e3898 | 630 | bootcmdline_init(); |
6acc7d48 | 631 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
2925aba4 RB |
632 | *cmdline_p = command_line; |
633 | ||
a09fc446 FBH |
634 | parse_early_param(); |
635 | ||
a94e4f24 JY |
636 | if (usermem) |
637 | pr_info("User-defined physical RAM map overwrite\n"); | |
638 | ||
639 | check_kernel_sections_mem(); | |
a09fc446 | 640 | |
73346081 MN |
641 | early_init_fdt_reserve_self(); |
642 | early_init_fdt_scan_reserved_mem(); | |
643 | ||
a94e4f24 JY |
644 | #ifndef CONFIG_NUMA |
645 | memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0); | |
646 | #endif | |
2925aba4 | 647 | bootmem_init(); |
bcec54bf MR |
648 | |
649 | /* | |
650 | * Prevent memblock from allocating high memory. | |
651 | * This cannot be done before max_low_pfn is detected, so up | |
652 | * to this point is possible to only reserve physical memory | |
eb31d559 | 653 | * with memblock_reserve; memblock_alloc* can be used |
bcec54bf MR |
654 | * only after this point |
655 | */ | |
656 | memblock_set_current_limit(PFN_PHYS(max_low_pfn)); | |
657 | ||
b306c5f5 | 658 | mips_reserve_vmcore(); |
c2882b7f PM |
659 | |
660 | mips_parse_crashkernel(); | |
f2ffa5ab | 661 | device_tree_init(); |
269b3a9a TY |
662 | |
663 | /* | |
664 | * In order to reduce the possibility of kernel panic when failed to | |
665 | * get IO TLB memory under CONFIG_SWIOTLB, it is better to allocate | |
666 | * low memory as small as possible before plat_swiotlb_setup(), so | |
667 | * make sparse_init() using top-down allocation. | |
668 | */ | |
669 | memblock_set_bottom_up(false); | |
2925aba4 | 670 | sparse_init(); |
269b3a9a TY |
671 | memblock_set_bottom_up(true); |
672 | ||
ee71b7d2 | 673 | plat_swiotlb_setup(); |
f4649382 ZLK |
674 | |
675 | dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); | |
a95d0692 | 676 | |
4e50a35d SS |
677 | /* Reserve for hibernation. */ |
678 | memblock_reserve(__pa_symbol(&__nosave_begin), | |
679 | __pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin)); | |
30c8f4e4 | 680 | |
a94e4f24 | 681 | early_memtest(PFN_PHYS(ARCH_PFN_OFFSET), PFN_PHYS(max_low_pfn)); |
2925aba4 RB |
682 | } |
683 | ||
8df32c63 | 684 | static void __init resource_init(void) |
1da177e4 | 685 | { |
b10d6bca MR |
686 | phys_addr_t start, end; |
687 | u64 i; | |
1da177e4 | 688 | |
6adb5fe7 RB |
689 | if (UNCAC_BASE != IO_BASE) |
690 | return; | |
691 | ||
f5bffe3a FBH |
692 | code_resource.start = __pa_symbol(&_text); |
693 | code_resource.end = __pa_symbol(&_etext) - 1; | |
694 | data_resource.start = __pa_symbol(&_etext); | |
695 | data_resource.end = __pa_symbol(&_edata) - 1; | |
e0c5f36b DD |
696 | bss_resource.start = __pa_symbol(&__bss_start); |
697 | bss_resource.end = __pa_symbol(&__bss_stop) - 1; | |
1da177e4 | 698 | |
b10d6bca | 699 | for_each_mem_range(i, &start, &end) { |
1da177e4 | 700 | struct resource *res; |
1da177e4 | 701 | |
7e1c4e27 | 702 | res = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES); |
8a7f97b9 MR |
703 | if (!res) |
704 | panic("%s: Failed to allocate %zu bytes\n", __func__, | |
705 | sizeof(struct resource)); | |
35d98e93 TK |
706 | |
707 | res->start = start; | |
b10d6bca MR |
708 | /* |
709 | * In memblock, end points to the first byte after the | |
710 | * range while in resourses, end points to the last byte in | |
711 | * the range. | |
712 | */ | |
713 | res->end = end - 1; | |
a94e4f24 JY |
714 | res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; |
715 | res->name = "System RAM"; | |
1da177e4 | 716 | |
1da177e4 LT |
717 | request_resource(&iomem_resource, res); |
718 | ||
719 | /* | |
720 | * We don't know which RAM region contains kernel data, | |
721 | * so we try it repeatedly and let the resource manager | |
722 | * test it. | |
723 | */ | |
724 | request_resource(res, &code_resource); | |
725 | request_resource(res, &data_resource); | |
e0c5f36b | 726 | request_resource(res, &bss_resource); |
7aa1c8f4 | 727 | request_crashkernel(res); |
1da177e4 LT |
728 | } |
729 | } | |
730 | ||
0f3f506b HC |
731 | #ifdef CONFIG_SMP |
732 | static void __init prefill_possible_map(void) | |
733 | { | |
734 | int i, possible = num_possible_cpus(); | |
735 | ||
736 | if (possible > nr_cpu_ids) | |
737 | possible = nr_cpu_ids; | |
738 | ||
739 | for (i = 0; i < possible; i++) | |
740 | set_cpu_possible(i, true); | |
741 | for (; i < NR_CPUS; i++) | |
742 | set_cpu_possible(i, false); | |
743 | ||
744 | nr_cpu_ids = possible; | |
745 | } | |
746 | #else | |
747 | static inline void prefill_possible_map(void) {} | |
748 | #endif | |
749 | ||
1da177e4 LT |
750 | void __init setup_arch(char **cmdline_p) |
751 | { | |
752 | cpu_probe(); | |
3af5a67c | 753 | mips_cm_probe(); |
1da177e4 | 754 | prom_init(); |
36a88530 | 755 | |
e934945d | 756 | setup_early_fdc_console(); |
36a88530 | 757 | #ifdef CONFIG_EARLY_PRINTK |
07cdb784 | 758 | setup_early_printk(); |
36a88530 | 759 | #endif |
1da177e4 | 760 | cpu_report(); |
20d60d99 | 761 | check_bugs_early(); |
1da177e4 LT |
762 | |
763 | #if defined(CONFIG_VT) | |
764 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 765 | conswitchp = &vga_con; |
1da177e4 LT |
766 | #endif |
767 | #endif | |
768 | ||
2925aba4 | 769 | arch_mem_init(cmdline_p); |
be8fa1cb | 770 | dmi_setup(); |
1da177e4 | 771 | |
1da177e4 | 772 | resource_init(); |
9b6695a8 | 773 | plat_smp_setup(); |
0f3f506b | 774 | prefill_possible_map(); |
6650df3c DD |
775 | |
776 | cpu_cache_init(); | |
058effe7 | 777 | paging_init(); |
4f1682b8 TY |
778 | |
779 | memblock_dump_all(); | |
1da177e4 LT |
780 | } |
781 | ||
69a6c312 AN |
782 | unsigned long kernelsp[NR_CPUS]; |
783 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee AN |
784 | |
785 | #ifdef CONFIG_DEBUG_FS | |
786 | struct dentry *mips_debugfs_dir; | |
787 | static int __init debugfs_mips(void) | |
788 | { | |
d8140426 | 789 | mips_debugfs_dir = debugfs_create_dir("mips", NULL); |
6312e0ee AN |
790 | return 0; |
791 | } | |
792 | arch_initcall(debugfs_mips); | |
793 | #endif | |
aa4db775 | 794 | |
a86497d6 | 795 | #ifdef CONFIG_DMA_NONCOHERENT |
aa4db775 CH |
796 | static int __init setcoherentio(char *str) |
797 | { | |
14ac09a6 | 798 | dma_default_coherent = true; |
aa4db775 CH |
799 | pr_info("Hardware DMA cache coherency (command line)\n"); |
800 | return 0; | |
801 | } | |
802 | early_param("coherentio", setcoherentio); | |
803 | ||
804 | static int __init setnocoherentio(char *str) | |
805 | { | |
a2ca967a | 806 | dma_default_coherent = false; |
aa4db775 CH |
807 | pr_info("Software DMA cache coherency (command line)\n"); |
808 | return 0; | |
809 | } | |
810 | early_param("nocoherentio", setnocoherentio); | |
811 | #endif |