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Paul Mundt01066622007-03-28 16:38:13 +09001/*
2 * linux/arch/sh/mm/init.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * Copyright (C) 1999 Niibe Yutaka
Paul Mundt19d8f842010-05-10 15:39:05 +09005 * Copyright (C) 2002 - 2010 Paul Mundt
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
7 * Based on linux/arch/i386/mm/init.c:
8 * Copyright (C) 1995 Linus Torvalds
9 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/mm.h>
11#include <linux/swap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/gfp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/bootmem.h>
Paul Mundt2cb7ce32006-09-27 18:20:58 +090015#include <linux/proc_fs.h>
Paul Mundt27641de2007-05-14 10:48:01 +090016#include <linux/pagemap.h>
Paul Mundt01066622007-03-28 16:38:13 +090017#include <linux/percpu.h>
18#include <linux/io.h>
Yinghai Lu95f72d12010-07-12 14:36:09 +100019#include <linux/memblock.h>
Paul Mundt94c28512009-10-27 17:07:45 +090020#include <linux/dma-mapping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <asm/mmu_context.h>
Paul Mundt4bc277a2010-05-11 13:32:19 +090022#include <asm/mmzone.h>
Paul Mundtc77b29d2010-05-18 14:53:23 +090023#include <asm/kexec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <asm/tlb.h>
25#include <asm/cacheflush.h>
Paul Mundt07cbb412007-06-06 12:23:06 +090026#include <asm/sections.h>
Paul Mundt4bc277a2010-05-11 13:32:19 +090027#include <asm/setup.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <asm/cache.h>
Paul Mundtb0f3ae02010-02-12 15:40:00 +090029#include <asm/sizes.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
31DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
32pgd_t swapper_pg_dir[PTRS_PER_PGD];
Stuart Menefyc6feb612008-09-05 16:06:42 +090033
Paul Mundt19d8f842010-05-10 15:39:05 +090034void __init generic_mem_init(void)
35{
Yinghai Lu95f72d12010-07-12 14:36:09 +100036 memblock_add(__MEMORY_START, __MEMORY_SIZE);
Paul Mundt19d8f842010-05-10 15:39:05 +090037}
38
Paul Mundt4bc277a2010-05-11 13:32:19 +090039void __init __weak plat_mem_setup(void)
40{
41 /* Nothing to see here, move along. */
42}
43
Yoshinori Sato11cbb702006-12-07 18:07:27 +090044#ifdef CONFIG_MMU
Matt Fleming07cad4d2009-11-17 22:03:41 +000045static pte_t *__get_pte_phys(unsigned long addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
47 pgd_t *pgd;
Paul Mundt26ff6c12006-09-27 15:13:36 +090048 pud_t *pud;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 pmd_t *pmd;
50 pte_t *pte;
51
Stuart Menefy99a596f2006-11-21 15:38:05 +090052 pgd = pgd_offset_k(addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 if (pgd_none(*pgd)) {
54 pgd_ERROR(*pgd);
Matt Fleming07cad4d2009-11-17 22:03:41 +000055 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 }
57
Stuart Menefy99a596f2006-11-21 15:38:05 +090058 pud = pud_alloc(NULL, pgd, addr);
59 if (unlikely(!pud)) {
60 pud_ERROR(*pud);
Matt Fleming07cad4d2009-11-17 22:03:41 +000061 return NULL;
Paul Mundt26ff6c12006-09-27 15:13:36 +090062 }
63
Stuart Menefy99a596f2006-11-21 15:38:05 +090064 pmd = pmd_alloc(NULL, pud, addr);
65 if (unlikely(!pmd)) {
66 pmd_ERROR(*pmd);
Matt Fleming07cad4d2009-11-17 22:03:41 +000067 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 }
69
70 pte = pte_offset_kernel(pmd, addr);
Matt Fleming07cad4d2009-11-17 22:03:41 +000071 return pte;
72}
73
74static 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 if (!pte_none(*pte)) {
80 pte_ERROR(*pte);
81 return;
82 }
83
84 set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot));
Paul Mundt997d0032009-06-19 15:37:11 +090085 local_flush_tlb_one(get_asid(), addr);
Matt Fleming07cad4d2009-11-17 22:03:41 +000086
87 if (pgprot_val(prot) & _PAGE_WIRED)
88 tlb_wire_entry(NULL, addr, *pte);
89}
90
91static 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102}
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104void __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}
Stuart Menefy2adb4e12007-11-30 17:59:55 +0900115
Matt Fleming07cad4d2009-11-17 22:03:41 +0000116void __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
Stuart Menefy2adb4e12007-11-30 17:59:55 +0900128void __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;
Paul Mundt0906a3a2009-09-03 17:21:10 +0900134 pte_t *pte;
135 int i, j, k;
Stuart Menefy2adb4e12007-11-30 17:59:55 +0900136 unsigned long vaddr;
137
Paul Mundt0906a3a2009-09-03 17:21:10 +0900138 vaddr = start;
139 i = __pgd_offset(vaddr);
140 j = __pud_offset(vaddr);
141 k = __pmd_offset(vaddr);
142 pgd = pgd_base + i;
Stuart Menefy2adb4e12007-11-30 17:59:55 +0900143
Paul Mundt0906a3a2009-09-03 17:21:10 +0900144 for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
145 pud = (pud_t *)pgd;
146 for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
Matt Fleming5d9b4b12009-12-13 14:38:50 +0000147#ifdef __PAGETABLE_PMD_FOLDED
Paul Mundt0906a3a2009-09-03 17:21:10 +0900148 pmd = (pmd_t *)pud;
Matt Fleming5d9b4b12009-12-13 14:38:50 +0000149#else
150 pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
151 pud_populate(&init_mm, pud, pmd);
152 pmd += k;
153#endif
Paul Mundt0906a3a2009-09-03 17:21:10 +0900154 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;
Stuart Menefy2adb4e12007-11-30 17:59:55 +0900163 }
Paul Mundt0906a3a2009-09-03 17:21:10 +0900164 j = 0;
Stuart Menefy2adb4e12007-11-30 17:59:55 +0900165 }
166}
Yoshinori Sato11cbb702006-12-07 18:07:27 +0900167#endif /* CONFIG_MMU */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Paul Mundt4bc277a2010-05-11 13:32:19 +0900169void __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
Yinghai Lu95f72d12010-07-12 14:36:09 +1000179 phys = __memblock_alloc_base(sizeof(struct pglist_data),
Paul Mundt4bc277a2010-05-11 13:32:19 +0900180 SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT);
181 /* Retry with all of system memory */
182 if (!phys)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000183 phys = __memblock_alloc_base(sizeof(struct pglist_data),
184 SMP_CACHE_BYTES, memblock_end_of_DRAM());
Paul Mundt4bc277a2010-05-11 13:32:19 +0900185 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
198static 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
Yinghai Lu95f72d12010-07-12 14:36:09 +1000215 paddr = memblock_alloc(total_pages << PAGE_SHIFT, PAGE_SIZE);
Paul Mundt4bc277a2010-05-11 13:32:19 +0900216 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. */
Yinghai Lu95f72d12010-07-12 14:36:09 +1000230 for (i = 0; i < memblock.reserved.cnt; i++)
231 reserve_bootmem(memblock.reserved.region[i].base,
232 memblock_size_bytes(&memblock.reserved, i),
Paul Mundt4bc277a2010-05-11 13:32:19 +0900233 BOOTMEM_DEFAULT);
234 }
235
236 sparse_memory_present_with_active_regions(nid);
237}
238
239static void __init do_init_bootmem(void)
240{
241 int i;
242
243 /* Add active regions with valid PFNs. */
Yinghai Lu95f72d12010-07-12 14:36:09 +1000244 for (i = 0; i < memblock.memory.cnt; i++) {
Paul Mundt4bc277a2010-05-11 13:32:19 +0900245 unsigned long start_pfn, end_pfn;
Yinghai Lu95f72d12010-07-12 14:36:09 +1000246 start_pfn = memblock.memory.region[i].base >> PAGE_SHIFT;
247 end_pfn = start_pfn + memblock_size_pages(&memblock.memory, i);
Paul Mundt4bc277a2010-05-11 13:32:19 +0900248 __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
263static 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 */
Yinghai Lu95f72d12010-07-12 14:36:09 +1000279 memblock_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
Paul Mundt4bc277a2010-05-11 13:32:19 +0900280 (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)
Yinghai Lu95f72d12010-07-12 14:36:09 +1000287 memblock_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
Paul Mundt4bc277a2010-05-11 13:32:19 +0900288
289 /*
290 * Handle additional early reservations
291 */
292 check_for_initrd();
293 reserve_crashkernel();
294}
295
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296void __init paging_init(void)
297{
Paul Mundt2de212e2007-06-06 12:09:54 +0900298 unsigned long max_zone_pfns[MAX_NR_ZONES];
Paul Mundt0906a3a2009-09-03 17:21:10 +0900299 unsigned long vaddr, end;
Paul Mundt01066622007-03-28 16:38:13 +0900300 int nid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
Yinghai Lu95f72d12010-07-12 14:36:09 +1000302 memblock_init();
Paul Mundt4bc277a2010-05-11 13:32:19 +0900303
304 sh_mv.mv_mem_init();
305
306 early_reserve_mem();
307
Yinghai Lu95f72d12010-07-12 14:36:09 +1000308 memblock_enforce_memory_limit(memory_limit);
309 memblock_analyze();
Paul Mundt4bc277a2010-05-11 13:32:19 +0900310
Yinghai Lu95f72d12010-07-12 14:36:09 +1000311 memblock_dump_all();
Paul Mundt4bc277a2010-05-11 13:32:19 +0900312
313 /*
314 * Determine low and high memory ranges:
315 */
Yinghai Lu95f72d12010-07-12 14:36:09 +1000316 max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT;
Paul Mundt4bc277a2010-05-11 13:32:19 +0900317 min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
318
319 nodes_clear(node_online_map);
320
321 memory_start = (unsigned long)__va(__MEMORY_START);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000322 memory_end = memory_start + (memory_limit ?: memblock_phys_mem_size());
Paul Mundt4bc277a2010-05-11 13:32:19 +0900323
324 uncached_init();
325 pmb_init();
326 do_init_bootmem();
327 ioremap_fixed_init();
328
Paul Mundt01066622007-03-28 16:38:13 +0900329 /* 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));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Stuart Menefy6e4662f2006-11-21 13:53:44 +0900334 /* 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
Paul Mundtacca4f42008-11-10 20:00:45 +0900338 /*
339 * Populate the relevant portions of swapper_pg_dir so that
Stuart Menefy2adb4e12007-11-30 17:59:55 +0900340 * we can use the fixmap entries without calling kmalloc.
Paul Mundtacca4f42008-11-10 20:00:45 +0900341 * pte's will be filled in by __set_fixmap().
342 */
343 vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
Paul Mundt0906a3a2009-09-03 17:21:10 +0900344 end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
345 page_table_range_init(vaddr, end, swapper_pg_dir);
Paul Mundtacca4f42008-11-10 20:00:45 +0900346
347 kmap_coherent_init();
Stuart Menefy2adb4e12007-11-30 17:59:55 +0900348
Paul Mundt2de212e2007-06-06 12:09:54 +0900349 memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
350
Paul Mundt01066622007-03-28 16:38:13 +0900351 for_each_online_node(nid) {
352 pg_data_t *pgdat = NODE_DATA(nid);
Paul Mundt01066622007-03-28 16:38:13 +0900353 unsigned long low, start_pfn;
354
Johannes Weiner3560e242008-07-23 21:28:09 -0700355 start_pfn = pgdat->bdata->node_min_pfn;
Paul Mundt01066622007-03-28 16:38:13 +0900356 low = pgdat->bdata->node_low_pfn;
357
Paul Mundt2de212e2007-06-06 12:09:54 +0900358 if (max_zone_pfns[ZONE_NORMAL] < low)
359 max_zone_pfns[ZONE_NORMAL] = low;
Paul Mundt01066622007-03-28 16:38:13 +0900360
361 printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n",
362 nid, start_pfn, low);
Paul Mundt01066622007-03-28 16:38:13 +0900363 }
Paul Mundt2de212e2007-06-06 12:09:54 +0900364
365 free_area_init_nodes(max_zone_pfns);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366}
367
Paul Mundt94c28512009-10-27 17:07:45 +0900368/*
369 * Early initialization for any I/O MMUs we might have.
370 */
371static void __init iommu_init(void)
372{
373 no_iommu_init();
374}
375
Paul Mundtd9b94872010-01-18 21:08:32 +0900376unsigned int mem_init_done = 0;
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378void __init mem_init(void)
379{
Paul Mundtdfbb9042007-05-23 17:48:36 +0900380 int codesize, datasize, initsize;
Paul Mundt01066622007-03-28 16:38:13 +0900381 int nid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
Paul Mundt94c28512009-10-27 17:07:45 +0900383 iommu_init();
384
Paul Mundt2de212e2007-06-06 12:09:54 +0900385 num_physpages = 0;
386 high_memory = NULL;
387
Paul Mundt01066622007-03-28 16:38:13 +0900388 for_each_online_node(nid) {
389 pg_data_t *pgdat = NODE_DATA(nid);
390 unsigned long node_pages = 0;
391 void *node_high_memory;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Paul Mundt01066622007-03-28 16:38:13 +0900393 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;
399
Paul Mundt2de212e2007-06-06 12:09:54 +0900400 node_high_memory = (void *)__va((pgdat->node_start_pfn +
401 pgdat->node_spanned_pages) <<
402 PAGE_SHIFT);
Paul Mundt01066622007-03-28 16:38:13 +0900403 if (node_high_memory > high_memory)
404 high_memory = node_high_memory;
405 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Paul Mundt37443ef2009-08-15 12:29:49 +0900407 /* Set this up early, so we can take care of the zero page */
408 cpu_cache_init();
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 /* clear the zero-page */
411 memset(empty_zero_page, 0, PAGE_SIZE);
412 __flush_wback_region(empty_zero_page, PAGE_SIZE);
413
Paul Mundt35f99c02010-01-20 18:48:17 +0900414 vsyscall_init();
415
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 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
Paul Mundt2cb7ce32006-09-27 18:20:58 +0900420 printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
Paul Mundtdfbb9042007-05-23 17:48:36 +0900421 "%dk data, %dk init)\n",
Geert Uytterhoevencc013a82009-09-21 17:02:36 -0700422 nr_free_pages() << (PAGE_SHIFT-10),
Paul Mundt2de212e2007-06-06 12:09:54 +0900423 num_physpages << (PAGE_SHIFT-10),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 codesize >> 10,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 datasize >> 10,
426 initsize >> 10);
427
Paul Mundt35f99c02010-01-20 18:48:17 +0900428 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"
Paul Mundt3125ee72010-01-21 15:54:31 +0900434 " lowmem : 0x%08lx - 0x%08lx (%4ld MB) (cached)\n"
Paul Mundtb0f3ae02010-02-12 15:40:00 +0900435#ifdef CONFIG_UNCACHED_MAPPING
Paul Mundt3125ee72010-01-21 15:54:31 +0900436 " : 0x%08lx - 0x%08lx (%4ld MB) (uncached)\n"
Paul Mundtb0f3ae02010-02-12 15:40:00 +0900437#endif
Paul Mundt35f99c02010-01-20 18:48:17 +0900438 " .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
Paul Mundtb0f3ae02010-02-12 15:40:00 +0900455#ifdef CONFIG_UNCACHED_MAPPING
Paul Mundt9edef282010-02-17 16:28:00 +0900456 uncached_start, uncached_end, uncached_size >> 20,
Paul Mundtb0f3ae02010-02-12 15:40:00 +0900457#endif
Paul Mundt3125ee72010-01-21 15:54:31 +0900458
Paul Mundt35f99c02010-01-20 18:48:17 +0900459 (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);
Paul Mundtd9b94872010-01-18 21:08:32 +0900468
469 mem_init_done = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470}
471
472void free_initmem(void)
473{
474 unsigned long addr;
Paul Mundt65463b72005-11-07 00:58:24 -0800475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 addr = (unsigned long)(&__init_begin);
477 for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
478 ClearPageReserved(virt_to_page(addr));
Nick Piggin7835e982006-03-22 00:08:40 -0800479 init_page_count(virt_to_page(addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 free_page(addr);
481 totalram_pages++;
482 }
Paul Mundt07cbb412007-06-06 12:23:06 +0900483 printk("Freeing unused kernel memory: %ldk freed\n",
484 ((unsigned long)&__init_end -
485 (unsigned long)&__init_begin) >> 10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486}
487
488#ifdef CONFIG_BLK_DEV_INITRD
489void 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));
Nick Piggin7835e982006-03-22 00:08:40 -0800494 init_page_count(virt_to_page(p));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 free_page(p);
496 totalram_pages++;
497 }
Paul Mundt2de212e2007-06-06 12:09:54 +0900498 printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499}
500#endif
Paul Mundt33d63bd2007-06-07 11:32:52 +0900501
502#ifdef CONFIG_MEMORY_HOTPLUG
Paul Mundt33d63bd2007-06-07 11:32:52 +0900503int 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.. */
Gary Hadec04fc582009-01-06 14:39:14 -0800513 ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL,
514 start_pfn, nr_pages);
Paul Mundt33d63bd2007-06-07 11:32:52 +0900515 if (unlikely(ret))
Harvey Harrison866e6b92008-03-04 15:23:47 -0800516 printk("%s: Failed, __add_pages() == %d\n", __func__, ret);
Paul Mundt33d63bd2007-06-07 11:32:52 +0900517
518 return ret;
519}
520EXPORT_SYMBOL_GPL(arch_add_memory);
521
Paul Mundt357d5942007-06-11 15:32:07 +0900522#ifdef CONFIG_NUMA
Paul Mundt33d63bd2007-06-07 11:32:52 +0900523int memory_add_physaddr_to_nid(u64 addr)
524{
525 /* Node 0 for now.. */
526 return 0;
527}
528EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
529#endif
Matt Fleming1f69b6a2009-10-06 21:22:25 +0000530
Paul Mundt3159e7d2008-09-05 15:39:12 +0900531#endif /* CONFIG_MEMORY_HOTPLUG */