Commit | Line | Data |
---|---|---|
01066625 PM |
1 | /* |
2 | * linux/arch/sh/mm/init.c | |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 1999 Niibe Yutaka | |
2f599861 | 5 | * Copyright (C) 2002 - 2011 Paul Mundt |
1da177e4 LT |
6 | * |
7 | * Based on linux/arch/i386/mm/init.c: | |
8 | * Copyright (C) 1995 Linus Torvalds | |
9 | */ | |
1da177e4 LT |
10 | #include <linux/mm.h> |
11 | #include <linux/swap.h> | |
1da177e4 | 12 | #include <linux/init.h> |
5a0e3ad6 | 13 | #include <linux/gfp.h> |
1da177e4 | 14 | #include <linux/bootmem.h> |
2cb7ce3b | 15 | #include <linux/proc_fs.h> |
27641dee | 16 | #include <linux/pagemap.h> |
01066625 PM |
17 | #include <linux/percpu.h> |
18 | #include <linux/io.h> | |
95f72d1e | 19 | #include <linux/memblock.h> |
94c28510 | 20 | #include <linux/dma-mapping.h> |
f7be3455 | 21 | #include <linux/export.h> |
1da177e4 | 22 | #include <asm/mmu_context.h> |
4bc277ac | 23 | #include <asm/mmzone.h> |
c77b29db | 24 | #include <asm/kexec.h> |
1da177e4 LT |
25 | #include <asm/tlb.h> |
26 | #include <asm/cacheflush.h> | |
07cbb41b | 27 | #include <asm/sections.h> |
4bc277ac | 28 | #include <asm/setup.h> |
1da177e4 | 29 | #include <asm/cache.h> |
b0f3ae03 | 30 | #include <asm/sizes.h> |
1da177e4 | 31 | |
1da177e4 | 32 | pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
c6feb614 | 33 | |
19d8f84f PM |
34 | void __init generic_mem_init(void) |
35 | { | |
95f72d1e | 36 | memblock_add(__MEMORY_START, __MEMORY_SIZE); |
19d8f84f PM |
37 | } |
38 | ||
4bc277ac PM |
39 | void __init __weak plat_mem_setup(void) |
40 | { | |
41 | /* Nothing to see here, move along. */ | |
42 | } | |
43 | ||
11cbb70e | 44 | #ifdef CONFIG_MMU |
07cad4dc | 45 | static pte_t *__get_pte_phys(unsigned long addr) |
1da177e4 LT |
46 | { |
47 | pgd_t *pgd; | |
26ff6c11 | 48 | pud_t *pud; |
1da177e4 | 49 | pmd_t *pmd; |
1da177e4 | 50 | |
99a596f9 | 51 | pgd = pgd_offset_k(addr); |
1da177e4 LT |
52 | if (pgd_none(*pgd)) { |
53 | pgd_ERROR(*pgd); | |
07cad4dc | 54 | return NULL; |
1da177e4 LT |
55 | } |
56 | ||
99a596f9 SM |
57 | pud = pud_alloc(NULL, pgd, addr); |
58 | if (unlikely(!pud)) { | |
59 | pud_ERROR(*pud); | |
07cad4dc | 60 | return NULL; |
26ff6c11 PM |
61 | } |
62 | ||
99a596f9 SM |
63 | pmd = pmd_alloc(NULL, pud, addr); |
64 | if (unlikely(!pmd)) { | |
65 | pmd_ERROR(*pmd); | |
07cad4dc | 66 | return NULL; |
1da177e4 LT |
67 | } |
68 | ||
598ee698 | 69 | return pte_offset_kernel(pmd, addr); |
07cad4dc MF |
70 | } |
71 | ||
72 | static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot) | |
73 | { | |
74 | pte_t *pte; | |
75 | ||
76 | pte = __get_pte_phys(addr); | |
1da177e4 LT |
77 | if (!pte_none(*pte)) { |
78 | pte_ERROR(*pte); | |
79 | return; | |
80 | } | |
81 | ||
82 | set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot)); | |
997d0030 | 83 | local_flush_tlb_one(get_asid(), addr); |
07cad4dc MF |
84 | |
85 | if (pgprot_val(prot) & _PAGE_WIRED) | |
86 | tlb_wire_entry(NULL, addr, *pte); | |
87 | } | |
88 | ||
89 | static void clear_pte_phys(unsigned long addr, pgprot_t prot) | |
90 | { | |
91 | pte_t *pte; | |
92 | ||
93 | pte = __get_pte_phys(addr); | |
94 | ||
95 | if (pgprot_val(prot) & _PAGE_WIRED) | |
96 | tlb_unwire_entry(); | |
97 | ||
98 | set_pte(pte, pfn_pte(0, __pgprot(0))); | |
99 | local_flush_tlb_one(get_asid(), addr); | |
1da177e4 LT |
100 | } |
101 | ||
1da177e4 LT |
102 | void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot) |
103 | { | |
104 | unsigned long address = __fix_to_virt(idx); | |
105 | ||
106 | if (idx >= __end_of_fixed_addresses) { | |
107 | BUG(); | |
108 | return; | |
109 | } | |
110 | ||
111 | set_pte_phys(address, phys, prot); | |
112 | } | |
2adb4e10 | 113 | |
07cad4dc MF |
114 | void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot) |
115 | { | |
116 | unsigned long address = __fix_to_virt(idx); | |
117 | ||
118 | if (idx >= __end_of_fixed_addresses) { | |
119 | BUG(); | |
120 | return; | |
121 | } | |
122 | ||
123 | clear_pte_phys(address, prot); | |
124 | } | |
125 | ||
598ee698 PM |
126 | static pmd_t * __init one_md_table_init(pud_t *pud) |
127 | { | |
128 | if (pud_none(*pud)) { | |
129 | pmd_t *pmd; | |
130 | ||
131 | pmd = alloc_bootmem_pages(PAGE_SIZE); | |
132 | pud_populate(&init_mm, pud, pmd); | |
133 | BUG_ON(pmd != pmd_offset(pud, 0)); | |
134 | } | |
135 | ||
136 | return pmd_offset(pud, 0); | |
137 | } | |
138 | ||
139 | static pte_t * __init one_page_table_init(pmd_t *pmd) | |
140 | { | |
141 | if (pmd_none(*pmd)) { | |
142 | pte_t *pte; | |
143 | ||
144 | pte = alloc_bootmem_pages(PAGE_SIZE); | |
145 | pmd_populate_kernel(&init_mm, pmd, pte); | |
146 | BUG_ON(pte != pte_offset_kernel(pmd, 0)); | |
147 | } | |
148 | ||
149 | return pte_offset_kernel(pmd, 0); | |
150 | } | |
151 | ||
152 | static pte_t * __init page_table_kmap_check(pte_t *pte, pmd_t *pmd, | |
153 | unsigned long vaddr, pte_t *lastpte) | |
154 | { | |
155 | return pte; | |
156 | } | |
157 | ||
2adb4e10 SM |
158 | void __init page_table_range_init(unsigned long start, unsigned long end, |
159 | pgd_t *pgd_base) | |
160 | { | |
161 | pgd_t *pgd; | |
162 | pud_t *pud; | |
163 | pmd_t *pmd; | |
598ee698 | 164 | pte_t *pte = NULL; |
0906a3ad | 165 | int i, j, k; |
2adb4e10 SM |
166 | unsigned long vaddr; |
167 | ||
0906a3ad PM |
168 | vaddr = start; |
169 | i = __pgd_offset(vaddr); | |
170 | j = __pud_offset(vaddr); | |
171 | k = __pmd_offset(vaddr); | |
172 | pgd = pgd_base + i; | |
173 | ||
174 | for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) { | |
175 | pud = (pud_t *)pgd; | |
176 | for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) { | |
598ee698 PM |
177 | pmd = one_md_table_init(pud); |
178 | #ifndef __PAGETABLE_PMD_FOLDED | |
5d9b4b19 MF |
179 | pmd += k; |
180 | #endif | |
0906a3ad | 181 | for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) { |
598ee698 PM |
182 | pte = page_table_kmap_check(one_page_table_init(pmd), |
183 | pmd, vaddr, pte); | |
0906a3ad PM |
184 | vaddr += PMD_SIZE; |
185 | } | |
186 | k = 0; | |
2adb4e10 | 187 | } |
0906a3ad | 188 | j = 0; |
2adb4e10 SM |
189 | } |
190 | } | |
11cbb70e | 191 | #endif /* CONFIG_MMU */ |
1da177e4 | 192 | |
4bc277ac PM |
193 | void __init allocate_pgdat(unsigned int nid) |
194 | { | |
195 | unsigned long start_pfn, end_pfn; | |
196 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
197 | unsigned long phys; | |
198 | #endif | |
199 | ||
200 | get_pfn_range_for_nid(nid, &start_pfn, &end_pfn); | |
201 | ||
202 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
95f72d1e | 203 | phys = __memblock_alloc_base(sizeof(struct pglist_data), |
4bc277ac PM |
204 | SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT); |
205 | /* Retry with all of system memory */ | |
206 | if (!phys) | |
95f72d1e YL |
207 | phys = __memblock_alloc_base(sizeof(struct pglist_data), |
208 | SMP_CACHE_BYTES, memblock_end_of_DRAM()); | |
4bc277ac PM |
209 | if (!phys) |
210 | panic("Can't allocate pgdat for node %d\n", nid); | |
211 | ||
212 | NODE_DATA(nid) = __va(phys); | |
213 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
214 | ||
215 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; | |
216 | #endif | |
217 | ||
218 | NODE_DATA(nid)->node_start_pfn = start_pfn; | |
219 | NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; | |
220 | } | |
221 | ||
222 | static void __init bootmem_init_one_node(unsigned int nid) | |
223 | { | |
224 | unsigned long total_pages, paddr; | |
225 | unsigned long end_pfn; | |
226 | struct pglist_data *p; | |
4bc277ac PM |
227 | |
228 | p = NODE_DATA(nid); | |
229 | ||
230 | /* Nothing to do.. */ | |
231 | if (!p->node_spanned_pages) | |
232 | return; | |
233 | ||
6408068e | 234 | end_pfn = pgdat_end_pfn(p); |
4bc277ac PM |
235 | |
236 | total_pages = bootmem_bootmap_pages(p->node_spanned_pages); | |
237 | ||
95f72d1e | 238 | paddr = memblock_alloc(total_pages << PAGE_SHIFT, PAGE_SIZE); |
4bc277ac PM |
239 | if (!paddr) |
240 | panic("Can't allocate bootmap for nid[%d]\n", nid); | |
241 | ||
242 | init_bootmem_node(p, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn); | |
243 | ||
244 | free_bootmem_with_active_regions(nid, end_pfn); | |
245 | ||
246 | /* | |
247 | * XXX Handle initial reservations for the system memory node | |
248 | * only for the moment, we'll refactor this later for handling | |
249 | * reservations in other nodes. | |
250 | */ | |
251 | if (nid == 0) { | |
64106ca6 BH |
252 | struct memblock_region *reg; |
253 | ||
4bc277ac | 254 | /* Reserve the sections we're already using. */ |
64106ca6 BH |
255 | for_each_memblock(reserved, reg) { |
256 | reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); | |
257 | } | |
4bc277ac PM |
258 | } |
259 | ||
260 | sparse_memory_present_with_active_regions(nid); | |
261 | } | |
262 | ||
263 | static void __init do_init_bootmem(void) | |
264 | { | |
64106ca6 | 265 | struct memblock_region *reg; |
4bc277ac PM |
266 | int i; |
267 | ||
268 | /* Add active regions with valid PFNs. */ | |
64106ca6 | 269 | for_each_memblock(memory, reg) { |
4bc277ac | 270 | unsigned long start_pfn, end_pfn; |
c7fc2de0 YL |
271 | start_pfn = memblock_region_memory_base_pfn(reg); |
272 | end_pfn = memblock_region_memory_end_pfn(reg); | |
4bc277ac PM |
273 | __add_active_range(0, start_pfn, end_pfn); |
274 | } | |
275 | ||
276 | /* All of system RAM sits in node 0 for the non-NUMA case */ | |
277 | allocate_pgdat(0); | |
278 | node_set_online(0); | |
279 | ||
280 | plat_mem_setup(); | |
281 | ||
282 | for_each_online_node(i) | |
283 | bootmem_init_one_node(i); | |
284 | ||
285 | sparse_init(); | |
286 | } | |
287 | ||
288 | static void __init early_reserve_mem(void) | |
289 | { | |
290 | unsigned long start_pfn; | |
e66ac3f2 SH |
291 | u32 zero_base = (u32)__MEMORY_START + (u32)PHYSICAL_OFFSET; |
292 | u32 start = zero_base + (u32)CONFIG_ZERO_PAGE_OFFSET; | |
4bc277ac PM |
293 | |
294 | /* | |
295 | * Partially used pages are not usable - thus | |
296 | * we are rounding upwards: | |
297 | */ | |
298 | start_pfn = PFN_UP(__pa(_end)); | |
299 | ||
300 | /* | |
301 | * Reserve the kernel text and Reserve the bootmem bitmap. We do | |
302 | * this in two steps (first step was init_bootmem()), because | |
303 | * this catches the (definitely buggy) case of us accidentally | |
304 | * initializing the bootmem allocator with an invalid RAM area. | |
305 | */ | |
e66ac3f2 | 306 | memblock_reserve(start, (PFN_PHYS(start_pfn) + PAGE_SIZE - 1) - start); |
4bc277ac PM |
307 | |
308 | /* | |
309 | * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET. | |
310 | */ | |
311 | if (CONFIG_ZERO_PAGE_OFFSET != 0) | |
e66ac3f2 | 312 | memblock_reserve(zero_base, CONFIG_ZERO_PAGE_OFFSET); |
4bc277ac PM |
313 | |
314 | /* | |
315 | * Handle additional early reservations | |
316 | */ | |
317 | check_for_initrd(); | |
318 | reserve_crashkernel(); | |
319 | } | |
320 | ||
1da177e4 LT |
321 | void __init paging_init(void) |
322 | { | |
2de212eb | 323 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
0906a3ad | 324 | unsigned long vaddr, end; |
01066625 | 325 | int nid; |
1da177e4 | 326 | |
4bc277ac PM |
327 | sh_mv.mv_mem_init(); |
328 | ||
329 | early_reserve_mem(); | |
330 | ||
2f599861 PM |
331 | /* |
332 | * Once the early reservations are out of the way, give the | |
333 | * platforms a chance to kick out some memory. | |
334 | */ | |
335 | if (sh_mv.mv_mem_reserve) | |
336 | sh_mv.mv_mem_reserve(); | |
337 | ||
95f72d1e | 338 | memblock_enforce_memory_limit(memory_limit); |
1aadc056 | 339 | memblock_allow_resize(); |
4bc277ac | 340 | |
95f72d1e | 341 | memblock_dump_all(); |
4bc277ac PM |
342 | |
343 | /* | |
344 | * Determine low and high memory ranges: | |
345 | */ | |
95f72d1e | 346 | max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT; |
4bc277ac PM |
347 | min_low_pfn = __MEMORY_START >> PAGE_SHIFT; |
348 | ||
349 | nodes_clear(node_online_map); | |
350 | ||
351 | memory_start = (unsigned long)__va(__MEMORY_START); | |
95f72d1e | 352 | memory_end = memory_start + (memory_limit ?: memblock_phys_mem_size()); |
4bc277ac PM |
353 | |
354 | uncached_init(); | |
355 | pmb_init(); | |
356 | do_init_bootmem(); | |
357 | ioremap_fixed_init(); | |
358 | ||
01066625 PM |
359 | /* We don't need to map the kernel through the TLB, as |
360 | * it is permanatly mapped using P1. So clear the | |
361 | * entire pgd. */ | |
362 | memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir)); | |
1da177e4 | 363 | |
6e4662ff SM |
364 | /* Set an initial value for the MMU.TTB so we don't have to |
365 | * check for a null value. */ | |
366 | set_TTB(swapper_pg_dir); | |
367 | ||
acca4f4d PM |
368 | /* |
369 | * Populate the relevant portions of swapper_pg_dir so that | |
2adb4e10 | 370 | * we can use the fixmap entries without calling kmalloc. |
acca4f4d PM |
371 | * pte's will be filled in by __set_fixmap(). |
372 | */ | |
373 | vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; | |
0906a3ad PM |
374 | end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK; |
375 | page_table_range_init(vaddr, end, swapper_pg_dir); | |
acca4f4d PM |
376 | |
377 | kmap_coherent_init(); | |
2adb4e10 | 378 | |
2de212eb PM |
379 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
380 | ||
01066625 PM |
381 | for_each_online_node(nid) { |
382 | pg_data_t *pgdat = NODE_DATA(nid); | |
01066625 PM |
383 | unsigned long low, start_pfn; |
384 | ||
3560e249 | 385 | start_pfn = pgdat->bdata->node_min_pfn; |
01066625 PM |
386 | low = pgdat->bdata->node_low_pfn; |
387 | ||
2de212eb PM |
388 | if (max_zone_pfns[ZONE_NORMAL] < low) |
389 | max_zone_pfns[ZONE_NORMAL] = low; | |
01066625 PM |
390 | |
391 | printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n", | |
392 | nid, start_pfn, low); | |
01066625 | 393 | } |
2de212eb PM |
394 | |
395 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
396 | } |
397 | ||
94c28510 PM |
398 | /* |
399 | * Early initialization for any I/O MMUs we might have. | |
400 | */ | |
401 | static void __init iommu_init(void) | |
402 | { | |
403 | no_iommu_init(); | |
404 | } | |
405 | ||
d9b9487a PM |
406 | unsigned int mem_init_done = 0; |
407 | ||
1da177e4 LT |
408 | void __init mem_init(void) |
409 | { | |
da61efcf | 410 | pg_data_t *pgdat; |
1da177e4 | 411 | |
94c28510 PM |
412 | iommu_init(); |
413 | ||
2de212eb | 414 | high_memory = NULL; |
e3a466b2 JL |
415 | for_each_online_pgdat(pgdat) |
416 | high_memory = max_t(void *, high_memory, | |
417 | __va(pgdat_end_pfn(pgdat) << PAGE_SHIFT)); | |
2de212eb | 418 | |
e3a466b2 | 419 | free_all_bootmem(); |
1da177e4 | 420 | |
37443ef3 PM |
421 | /* Set this up early, so we can take care of the zero page */ |
422 | cpu_cache_init(); | |
423 | ||
1da177e4 LT |
424 | /* clear the zero-page */ |
425 | memset(empty_zero_page, 0, PAGE_SIZE); | |
426 | __flush_wback_region(empty_zero_page, PAGE_SIZE); | |
427 | ||
35f99c0d PM |
428 | vsyscall_init(); |
429 | ||
da61efcf JL |
430 | mem_init_print_info(NULL); |
431 | pr_info("virtual kernel memory layout:\n" | |
35f99c0d PM |
432 | " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" |
433 | #ifdef CONFIG_HIGHMEM | |
434 | " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
435 | #endif | |
436 | " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
3125ee72 | 437 | " lowmem : 0x%08lx - 0x%08lx (%4ld MB) (cached)\n" |
b0f3ae03 | 438 | #ifdef CONFIG_UNCACHED_MAPPING |
3125ee72 | 439 | " : 0x%08lx - 0x%08lx (%4ld MB) (uncached)\n" |
b0f3ae03 | 440 | #endif |
35f99c0d PM |
441 | " .init : 0x%08lx - 0x%08lx (%4ld kB)\n" |
442 | " .data : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
443 | " .text : 0x%08lx - 0x%08lx (%4ld kB)\n", | |
444 | FIXADDR_START, FIXADDR_TOP, | |
445 | (FIXADDR_TOP - FIXADDR_START) >> 10, | |
446 | ||
447 | #ifdef CONFIG_HIGHMEM | |
448 | PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE, | |
449 | (LAST_PKMAP*PAGE_SIZE) >> 10, | |
450 | #endif | |
451 | ||
452 | (unsigned long)VMALLOC_START, VMALLOC_END, | |
453 | (VMALLOC_END - VMALLOC_START) >> 20, | |
454 | ||
455 | (unsigned long)memory_start, (unsigned long)high_memory, | |
456 | ((unsigned long)high_memory - (unsigned long)memory_start) >> 20, | |
457 | ||
b0f3ae03 | 458 | #ifdef CONFIG_UNCACHED_MAPPING |
9edef286 | 459 | uncached_start, uncached_end, uncached_size >> 20, |
b0f3ae03 | 460 | #endif |
3125ee72 | 461 | |
35f99c0d PM |
462 | (unsigned long)&__init_begin, (unsigned long)&__init_end, |
463 | ((unsigned long)&__init_end - | |
464 | (unsigned long)&__init_begin) >> 10, | |
465 | ||
466 | (unsigned long)&_etext, (unsigned long)&_edata, | |
467 | ((unsigned long)&_edata - (unsigned long)&_etext) >> 10, | |
468 | ||
469 | (unsigned long)&_text, (unsigned long)&_etext, | |
470 | ((unsigned long)&_etext - (unsigned long)&_text) >> 10); | |
d9b9487a PM |
471 | |
472 | mem_init_done = 1; | |
1da177e4 LT |
473 | } |
474 | ||
475 | void free_initmem(void) | |
476 | { | |
dbe67df4 | 477 | free_initmem_default(-1); |
1da177e4 LT |
478 | } |
479 | ||
480 | #ifdef CONFIG_BLK_DEV_INITRD | |
481 | void free_initrd_mem(unsigned long start, unsigned long end) | |
482 | { | |
dbe67df4 | 483 | free_reserved_area((void *)start, (void *)end, -1, "initrd"); |
1da177e4 LT |
484 | } |
485 | #endif | |
33d63bd8 PM |
486 | |
487 | #ifdef CONFIG_MEMORY_HOTPLUG | |
33d63bd8 PM |
488 | int arch_add_memory(int nid, u64 start, u64 size) |
489 | { | |
490 | pg_data_t *pgdat; | |
491 | unsigned long start_pfn = start >> PAGE_SHIFT; | |
492 | unsigned long nr_pages = size >> PAGE_SHIFT; | |
493 | int ret; | |
494 | ||
495 | pgdat = NODE_DATA(nid); | |
496 | ||
497 | /* We only have ZONE_NORMAL, so this is easy.. */ | |
6e90b58b WN |
498 | ret = __add_pages(nid, pgdat->node_zones + |
499 | zone_for_memory(nid, start, size, ZONE_NORMAL), | |
500 | start_pfn, nr_pages); | |
33d63bd8 | 501 | if (unlikely(ret)) |
866e6b9e | 502 | printk("%s: Failed, __add_pages() == %d\n", __func__, ret); |
33d63bd8 PM |
503 | |
504 | return ret; | |
505 | } | |
506 | EXPORT_SYMBOL_GPL(arch_add_memory); | |
507 | ||
357d5946 | 508 | #ifdef CONFIG_NUMA |
33d63bd8 PM |
509 | int memory_add_physaddr_to_nid(u64 addr) |
510 | { | |
511 | /* Node 0 for now.. */ | |
512 | return 0; | |
513 | } | |
514 | EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); | |
515 | #endif | |
1f69b6af | 516 | |
24d335ca WC |
517 | #ifdef CONFIG_MEMORY_HOTREMOVE |
518 | int arch_remove_memory(u64 start, u64 size) | |
519 | { | |
520 | unsigned long start_pfn = start >> PAGE_SHIFT; | |
521 | unsigned long nr_pages = size >> PAGE_SHIFT; | |
522 | struct zone *zone; | |
523 | int ret; | |
524 | ||
525 | zone = page_zone(pfn_to_page(start_pfn)); | |
526 | ret = __remove_pages(zone, start_pfn, nr_pages); | |
527 | if (unlikely(ret)) | |
528 | pr_warn("%s: Failed, __remove_pages() == %d\n", __func__, | |
529 | ret); | |
530 | ||
531 | return ret; | |
532 | } | |
533 | #endif | |
3159e7d6 | 534 | #endif /* CONFIG_MEMORY_HOTPLUG */ |