Commit | Line | Data |
---|---|---|
01066625 PM |
1 | /* |
2 | * linux/arch/sh/mm/init.c | |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 1999 Niibe Yutaka | |
19d8f84f | 5 | * Copyright (C) 2002 - 2010 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> |
1da177e4 | 21 | #include <asm/mmu_context.h> |
4bc277ac | 22 | #include <asm/mmzone.h> |
c77b29db | 23 | #include <asm/kexec.h> |
1da177e4 LT |
24 | #include <asm/tlb.h> |
25 | #include <asm/cacheflush.h> | |
07cbb41b | 26 | #include <asm/sections.h> |
4bc277ac | 27 | #include <asm/setup.h> |
1da177e4 | 28 | #include <asm/cache.h> |
b0f3ae03 | 29 | #include <asm/sizes.h> |
1da177e4 LT |
30 | |
31 | DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); | |
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 LT |
49 | pmd_t *pmd; |
50 | pte_t *pte; | |
51 | ||
99a596f9 | 52 | pgd = pgd_offset_k(addr); |
1da177e4 LT |
53 | if (pgd_none(*pgd)) { |
54 | pgd_ERROR(*pgd); | |
07cad4dc | 55 | return NULL; |
1da177e4 LT |
56 | } |
57 | ||
99a596f9 SM |
58 | pud = pud_alloc(NULL, pgd, addr); |
59 | if (unlikely(!pud)) { | |
60 | pud_ERROR(*pud); | |
07cad4dc | 61 | return NULL; |
26ff6c11 PM |
62 | } |
63 | ||
99a596f9 SM |
64 | pmd = pmd_alloc(NULL, pud, addr); |
65 | if (unlikely(!pmd)) { | |
66 | pmd_ERROR(*pmd); | |
07cad4dc | 67 | return NULL; |
1da177e4 LT |
68 | } |
69 | ||
70 | pte = pte_offset_kernel(pmd, addr); | |
07cad4dc MF |
71 | return pte; |
72 | } | |
73 | ||
74 | static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot) | |
75 | { | |
76 | pte_t *pte; | |
77 | ||
78 | pte = __get_pte_phys(addr); | |
1da177e4 LT |
79 | if (!pte_none(*pte)) { |
80 | pte_ERROR(*pte); | |
81 | return; | |
82 | } | |
83 | ||
84 | set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot)); | |
997d0030 | 85 | local_flush_tlb_one(get_asid(), addr); |
07cad4dc MF |
86 | |
87 | if (pgprot_val(prot) & _PAGE_WIRED) | |
88 | tlb_wire_entry(NULL, addr, *pte); | |
89 | } | |
90 | ||
91 | static void clear_pte_phys(unsigned long addr, pgprot_t prot) | |
92 | { | |
93 | pte_t *pte; | |
94 | ||
95 | pte = __get_pte_phys(addr); | |
96 | ||
97 | if (pgprot_val(prot) & _PAGE_WIRED) | |
98 | tlb_unwire_entry(); | |
99 | ||
100 | set_pte(pte, pfn_pte(0, __pgprot(0))); | |
101 | local_flush_tlb_one(get_asid(), addr); | |
1da177e4 LT |
102 | } |
103 | ||
1da177e4 LT |
104 | void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot) |
105 | { | |
106 | unsigned long address = __fix_to_virt(idx); | |
107 | ||
108 | if (idx >= __end_of_fixed_addresses) { | |
109 | BUG(); | |
110 | return; | |
111 | } | |
112 | ||
113 | set_pte_phys(address, phys, prot); | |
114 | } | |
2adb4e10 | 115 | |
07cad4dc MF |
116 | void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot) |
117 | { | |
118 | unsigned long address = __fix_to_virt(idx); | |
119 | ||
120 | if (idx >= __end_of_fixed_addresses) { | |
121 | BUG(); | |
122 | return; | |
123 | } | |
124 | ||
125 | clear_pte_phys(address, prot); | |
126 | } | |
127 | ||
2adb4e10 SM |
128 | void __init page_table_range_init(unsigned long start, unsigned long end, |
129 | pgd_t *pgd_base) | |
130 | { | |
131 | pgd_t *pgd; | |
132 | pud_t *pud; | |
133 | pmd_t *pmd; | |
0906a3ad PM |
134 | pte_t *pte; |
135 | int i, j, k; | |
2adb4e10 SM |
136 | unsigned long vaddr; |
137 | ||
0906a3ad PM |
138 | vaddr = start; |
139 | i = __pgd_offset(vaddr); | |
140 | j = __pud_offset(vaddr); | |
141 | k = __pmd_offset(vaddr); | |
142 | pgd = pgd_base + i; | |
143 | ||
144 | for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) { | |
145 | pud = (pud_t *)pgd; | |
146 | for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) { | |
5d9b4b19 | 147 | #ifdef __PAGETABLE_PMD_FOLDED |
0906a3ad | 148 | pmd = (pmd_t *)pud; |
5d9b4b19 MF |
149 | #else |
150 | pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE); | |
151 | pud_populate(&init_mm, pud, pmd); | |
152 | pmd += k; | |
153 | #endif | |
0906a3ad PM |
154 | for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) { |
155 | if (pmd_none(*pmd)) { | |
156 | pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE); | |
157 | pmd_populate_kernel(&init_mm, pmd, pte); | |
158 | BUG_ON(pte != pte_offset_kernel(pmd, 0)); | |
159 | } | |
160 | vaddr += PMD_SIZE; | |
161 | } | |
162 | k = 0; | |
2adb4e10 | 163 | } |
0906a3ad | 164 | j = 0; |
2adb4e10 SM |
165 | } |
166 | } | |
11cbb70e | 167 | #endif /* CONFIG_MMU */ |
1da177e4 | 168 | |
4bc277ac PM |
169 | void __init allocate_pgdat(unsigned int nid) |
170 | { | |
171 | unsigned long start_pfn, end_pfn; | |
172 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
173 | unsigned long phys; | |
174 | #endif | |
175 | ||
176 | get_pfn_range_for_nid(nid, &start_pfn, &end_pfn); | |
177 | ||
178 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
95f72d1e | 179 | phys = __memblock_alloc_base(sizeof(struct pglist_data), |
4bc277ac PM |
180 | SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT); |
181 | /* Retry with all of system memory */ | |
182 | if (!phys) | |
95f72d1e YL |
183 | phys = __memblock_alloc_base(sizeof(struct pglist_data), |
184 | SMP_CACHE_BYTES, memblock_end_of_DRAM()); | |
4bc277ac PM |
185 | if (!phys) |
186 | panic("Can't allocate pgdat for node %d\n", nid); | |
187 | ||
188 | NODE_DATA(nid) = __va(phys); | |
189 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
190 | ||
191 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; | |
192 | #endif | |
193 | ||
194 | NODE_DATA(nid)->node_start_pfn = start_pfn; | |
195 | NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; | |
196 | } | |
197 | ||
198 | static void __init bootmem_init_one_node(unsigned int nid) | |
199 | { | |
200 | unsigned long total_pages, paddr; | |
201 | unsigned long end_pfn; | |
202 | struct pglist_data *p; | |
203 | int i; | |
204 | ||
205 | p = NODE_DATA(nid); | |
206 | ||
207 | /* Nothing to do.. */ | |
208 | if (!p->node_spanned_pages) | |
209 | return; | |
210 | ||
211 | end_pfn = p->node_start_pfn + p->node_spanned_pages; | |
212 | ||
213 | total_pages = bootmem_bootmap_pages(p->node_spanned_pages); | |
214 | ||
95f72d1e | 215 | paddr = memblock_alloc(total_pages << PAGE_SHIFT, PAGE_SIZE); |
4bc277ac PM |
216 | if (!paddr) |
217 | panic("Can't allocate bootmap for nid[%d]\n", nid); | |
218 | ||
219 | init_bootmem_node(p, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn); | |
220 | ||
221 | free_bootmem_with_active_regions(nid, end_pfn); | |
222 | ||
223 | /* | |
224 | * XXX Handle initial reservations for the system memory node | |
225 | * only for the moment, we'll refactor this later for handling | |
226 | * reservations in other nodes. | |
227 | */ | |
228 | if (nid == 0) { | |
229 | /* Reserve the sections we're already using. */ | |
95f72d1e YL |
230 | for (i = 0; i < memblock.reserved.cnt; i++) |
231 | reserve_bootmem(memblock.reserved.region[i].base, | |
232 | memblock_size_bytes(&memblock.reserved, i), | |
4bc277ac PM |
233 | BOOTMEM_DEFAULT); |
234 | } | |
235 | ||
236 | sparse_memory_present_with_active_regions(nid); | |
237 | } | |
238 | ||
239 | static void __init do_init_bootmem(void) | |
240 | { | |
241 | int i; | |
242 | ||
243 | /* Add active regions with valid PFNs. */ | |
95f72d1e | 244 | for (i = 0; i < memblock.memory.cnt; i++) { |
4bc277ac | 245 | unsigned long start_pfn, end_pfn; |
95f72d1e YL |
246 | start_pfn = memblock.memory.region[i].base >> PAGE_SHIFT; |
247 | end_pfn = start_pfn + memblock_size_pages(&memblock.memory, i); | |
4bc277ac PM |
248 | __add_active_range(0, start_pfn, end_pfn); |
249 | } | |
250 | ||
251 | /* All of system RAM sits in node 0 for the non-NUMA case */ | |
252 | allocate_pgdat(0); | |
253 | node_set_online(0); | |
254 | ||
255 | plat_mem_setup(); | |
256 | ||
257 | for_each_online_node(i) | |
258 | bootmem_init_one_node(i); | |
259 | ||
260 | sparse_init(); | |
261 | } | |
262 | ||
263 | static void __init early_reserve_mem(void) | |
264 | { | |
265 | unsigned long start_pfn; | |
266 | ||
267 | /* | |
268 | * Partially used pages are not usable - thus | |
269 | * we are rounding upwards: | |
270 | */ | |
271 | start_pfn = PFN_UP(__pa(_end)); | |
272 | ||
273 | /* | |
274 | * Reserve the kernel text and Reserve the bootmem bitmap. We do | |
275 | * this in two steps (first step was init_bootmem()), because | |
276 | * this catches the (definitely buggy) case of us accidentally | |
277 | * initializing the bootmem allocator with an invalid RAM area. | |
278 | */ | |
95f72d1e | 279 | memblock_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET, |
4bc277ac PM |
280 | (PFN_PHYS(start_pfn) + PAGE_SIZE - 1) - |
281 | (__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET)); | |
282 | ||
283 | /* | |
284 | * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET. | |
285 | */ | |
286 | if (CONFIG_ZERO_PAGE_OFFSET != 0) | |
95f72d1e | 287 | memblock_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET); |
4bc277ac PM |
288 | |
289 | /* | |
290 | * Handle additional early reservations | |
291 | */ | |
292 | check_for_initrd(); | |
293 | reserve_crashkernel(); | |
294 | } | |
295 | ||
1da177e4 LT |
296 | void __init paging_init(void) |
297 | { | |
2de212eb | 298 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
0906a3ad | 299 | unsigned long vaddr, end; |
01066625 | 300 | int nid; |
1da177e4 | 301 | |
95f72d1e | 302 | memblock_init(); |
4bc277ac PM |
303 | |
304 | sh_mv.mv_mem_init(); | |
305 | ||
306 | early_reserve_mem(); | |
307 | ||
95f72d1e YL |
308 | memblock_enforce_memory_limit(memory_limit); |
309 | memblock_analyze(); | |
4bc277ac | 310 | |
95f72d1e | 311 | memblock_dump_all(); |
4bc277ac PM |
312 | |
313 | /* | |
314 | * Determine low and high memory ranges: | |
315 | */ | |
95f72d1e | 316 | max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT; |
4bc277ac PM |
317 | min_low_pfn = __MEMORY_START >> PAGE_SHIFT; |
318 | ||
319 | nodes_clear(node_online_map); | |
320 | ||
321 | memory_start = (unsigned long)__va(__MEMORY_START); | |
95f72d1e | 322 | memory_end = memory_start + (memory_limit ?: memblock_phys_mem_size()); |
4bc277ac PM |
323 | |
324 | uncached_init(); | |
325 | pmb_init(); | |
326 | do_init_bootmem(); | |
327 | ioremap_fixed_init(); | |
328 | ||
01066625 PM |
329 | /* We don't need to map the kernel through the TLB, as |
330 | * it is permanatly mapped using P1. So clear the | |
331 | * entire pgd. */ | |
332 | memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir)); | |
1da177e4 | 333 | |
6e4662ff SM |
334 | /* Set an initial value for the MMU.TTB so we don't have to |
335 | * check for a null value. */ | |
336 | set_TTB(swapper_pg_dir); | |
337 | ||
acca4f4d PM |
338 | /* |
339 | * Populate the relevant portions of swapper_pg_dir so that | |
2adb4e10 | 340 | * we can use the fixmap entries without calling kmalloc. |
acca4f4d PM |
341 | * pte's will be filled in by __set_fixmap(). |
342 | */ | |
343 | vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; | |
0906a3ad PM |
344 | end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK; |
345 | page_table_range_init(vaddr, end, swapper_pg_dir); | |
acca4f4d PM |
346 | |
347 | kmap_coherent_init(); | |
2adb4e10 | 348 | |
2de212eb PM |
349 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
350 | ||
01066625 PM |
351 | for_each_online_node(nid) { |
352 | pg_data_t *pgdat = NODE_DATA(nid); | |
01066625 PM |
353 | unsigned long low, start_pfn; |
354 | ||
3560e249 | 355 | start_pfn = pgdat->bdata->node_min_pfn; |
01066625 PM |
356 | low = pgdat->bdata->node_low_pfn; |
357 | ||
2de212eb PM |
358 | if (max_zone_pfns[ZONE_NORMAL] < low) |
359 | max_zone_pfns[ZONE_NORMAL] = low; | |
01066625 PM |
360 | |
361 | printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n", | |
362 | nid, start_pfn, low); | |
01066625 | 363 | } |
2de212eb PM |
364 | |
365 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
366 | } |
367 | ||
94c28510 PM |
368 | /* |
369 | * Early initialization for any I/O MMUs we might have. | |
370 | */ | |
371 | static void __init iommu_init(void) | |
372 | { | |
373 | no_iommu_init(); | |
374 | } | |
375 | ||
d9b9487a PM |
376 | unsigned int mem_init_done = 0; |
377 | ||
1da177e4 LT |
378 | void __init mem_init(void) |
379 | { | |
dfbb9042 | 380 | int codesize, datasize, initsize; |
01066625 | 381 | int nid; |
1da177e4 | 382 | |
94c28510 PM |
383 | iommu_init(); |
384 | ||
2de212eb PM |
385 | num_physpages = 0; |
386 | high_memory = NULL; | |
387 | ||
01066625 PM |
388 | for_each_online_node(nid) { |
389 | pg_data_t *pgdat = NODE_DATA(nid); | |
390 | unsigned long node_pages = 0; | |
391 | void *node_high_memory; | |
01066625 PM |
392 | |
393 | num_physpages += pgdat->node_present_pages; | |
394 | ||
395 | if (pgdat->node_spanned_pages) | |
396 | node_pages = free_all_bootmem_node(pgdat); | |
397 | ||
398 | totalram_pages += node_pages; | |
1da177e4 | 399 | |
2de212eb PM |
400 | node_high_memory = (void *)__va((pgdat->node_start_pfn + |
401 | pgdat->node_spanned_pages) << | |
402 | PAGE_SHIFT); | |
01066625 PM |
403 | if (node_high_memory > high_memory) |
404 | high_memory = node_high_memory; | |
405 | } | |
1da177e4 | 406 | |
37443ef3 PM |
407 | /* Set this up early, so we can take care of the zero page */ |
408 | cpu_cache_init(); | |
409 | ||
1da177e4 LT |
410 | /* clear the zero-page */ |
411 | memset(empty_zero_page, 0, PAGE_SIZE); | |
412 | __flush_wback_region(empty_zero_page, PAGE_SIZE); | |
413 | ||
35f99c0d PM |
414 | vsyscall_init(); |
415 | ||
1da177e4 LT |
416 | codesize = (unsigned long) &_etext - (unsigned long) &_text; |
417 | datasize = (unsigned long) &_edata - (unsigned long) &_etext; | |
418 | initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; | |
419 | ||
2cb7ce3b | 420 | printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, " |
dfbb9042 | 421 | "%dk data, %dk init)\n", |
cc013a88 | 422 | nr_free_pages() << (PAGE_SHIFT-10), |
2de212eb | 423 | num_physpages << (PAGE_SHIFT-10), |
1da177e4 | 424 | codesize >> 10, |
1da177e4 LT |
425 | datasize >> 10, |
426 | initsize >> 10); | |
427 | ||
35f99c0d PM |
428 | printk(KERN_INFO "virtual kernel memory layout:\n" |
429 | " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
430 | #ifdef CONFIG_HIGHMEM | |
431 | " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
432 | #endif | |
433 | " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
3125ee72 | 434 | " lowmem : 0x%08lx - 0x%08lx (%4ld MB) (cached)\n" |
b0f3ae03 | 435 | #ifdef CONFIG_UNCACHED_MAPPING |
3125ee72 | 436 | " : 0x%08lx - 0x%08lx (%4ld MB) (uncached)\n" |
b0f3ae03 | 437 | #endif |
35f99c0d PM |
438 | " .init : 0x%08lx - 0x%08lx (%4ld kB)\n" |
439 | " .data : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
440 | " .text : 0x%08lx - 0x%08lx (%4ld kB)\n", | |
441 | FIXADDR_START, FIXADDR_TOP, | |
442 | (FIXADDR_TOP - FIXADDR_START) >> 10, | |
443 | ||
444 | #ifdef CONFIG_HIGHMEM | |
445 | PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE, | |
446 | (LAST_PKMAP*PAGE_SIZE) >> 10, | |
447 | #endif | |
448 | ||
449 | (unsigned long)VMALLOC_START, VMALLOC_END, | |
450 | (VMALLOC_END - VMALLOC_START) >> 20, | |
451 | ||
452 | (unsigned long)memory_start, (unsigned long)high_memory, | |
453 | ((unsigned long)high_memory - (unsigned long)memory_start) >> 20, | |
454 | ||
b0f3ae03 | 455 | #ifdef CONFIG_UNCACHED_MAPPING |
9edef286 | 456 | uncached_start, uncached_end, uncached_size >> 20, |
b0f3ae03 | 457 | #endif |
3125ee72 | 458 | |
35f99c0d PM |
459 | (unsigned long)&__init_begin, (unsigned long)&__init_end, |
460 | ((unsigned long)&__init_end - | |
461 | (unsigned long)&__init_begin) >> 10, | |
462 | ||
463 | (unsigned long)&_etext, (unsigned long)&_edata, | |
464 | ((unsigned long)&_edata - (unsigned long)&_etext) >> 10, | |
465 | ||
466 | (unsigned long)&_text, (unsigned long)&_etext, | |
467 | ((unsigned long)&_etext - (unsigned long)&_text) >> 10); | |
d9b9487a PM |
468 | |
469 | mem_init_done = 1; | |
1da177e4 LT |
470 | } |
471 | ||
472 | void free_initmem(void) | |
473 | { | |
474 | unsigned long addr; | |
65463b73 | 475 | |
1da177e4 LT |
476 | addr = (unsigned long)(&__init_begin); |
477 | for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { | |
478 | ClearPageReserved(virt_to_page(addr)); | |
7835e98b | 479 | init_page_count(virt_to_page(addr)); |
1da177e4 LT |
480 | free_page(addr); |
481 | totalram_pages++; | |
482 | } | |
07cbb41b PM |
483 | printk("Freeing unused kernel memory: %ldk freed\n", |
484 | ((unsigned long)&__init_end - | |
485 | (unsigned long)&__init_begin) >> 10); | |
1da177e4 LT |
486 | } |
487 | ||
488 | #ifdef CONFIG_BLK_DEV_INITRD | |
489 | void free_initrd_mem(unsigned long start, unsigned long end) | |
490 | { | |
491 | unsigned long p; | |
492 | for (p = start; p < end; p += PAGE_SIZE) { | |
493 | ClearPageReserved(virt_to_page(p)); | |
7835e98b | 494 | init_page_count(virt_to_page(p)); |
1da177e4 LT |
495 | free_page(p); |
496 | totalram_pages++; | |
497 | } | |
2de212eb | 498 | printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); |
1da177e4 LT |
499 | } |
500 | #endif | |
33d63bd8 PM |
501 | |
502 | #ifdef CONFIG_MEMORY_HOTPLUG | |
33d63bd8 PM |
503 | int arch_add_memory(int nid, u64 start, u64 size) |
504 | { | |
505 | pg_data_t *pgdat; | |
506 | unsigned long start_pfn = start >> PAGE_SHIFT; | |
507 | unsigned long nr_pages = size >> PAGE_SHIFT; | |
508 | int ret; | |
509 | ||
510 | pgdat = NODE_DATA(nid); | |
511 | ||
512 | /* We only have ZONE_NORMAL, so this is easy.. */ | |
c04fc586 GH |
513 | ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL, |
514 | start_pfn, nr_pages); | |
33d63bd8 | 515 | if (unlikely(ret)) |
866e6b9e | 516 | printk("%s: Failed, __add_pages() == %d\n", __func__, ret); |
33d63bd8 PM |
517 | |
518 | return ret; | |
519 | } | |
520 | EXPORT_SYMBOL_GPL(arch_add_memory); | |
521 | ||
357d5946 | 522 | #ifdef CONFIG_NUMA |
33d63bd8 PM |
523 | int memory_add_physaddr_to_nid(u64 addr) |
524 | { | |
525 | /* Node 0 for now.. */ | |
526 | return 0; | |
527 | } | |
528 | EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); | |
529 | #endif | |
1f69b6af | 530 | |
3159e7d6 | 531 | #endif /* CONFIG_MEMORY_HOTPLUG */ |