1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17#include <linux/bootmem.h>
18#include <linux/efi.h>
19#include <linux/mm.h>
20#include <linux/nmi.h>
21#include <linux/swap.h>
22
23#include <asm/meminit.h>
24#include <asm/pgalloc.h>
25#include <asm/pgtable.h>
26#include <asm/sections.h>
27#include <asm/mca.h>
28
29#ifdef CONFIG_VIRTUAL_MEM_MAP
30static unsigned long max_gap;
31#endif
32
33
34
35
36
37
38
39void show_mem(void)
40{
41 int i, total_reserved = 0;
42 int total_shared = 0, total_cached = 0;
43 unsigned long total_present = 0;
44 pg_data_t *pgdat;
45
46 printk(KERN_INFO "Mem-info:\n");
47 show_free_areas();
48 printk(KERN_INFO "Node memory in pages:\n");
49 for_each_online_pgdat(pgdat) {
50 unsigned long present;
51 unsigned long flags;
52 int shared = 0, cached = 0, reserved = 0;
53
54 pgdat_resize_lock(pgdat, &flags);
55 present = pgdat->node_present_pages;
56 for(i = 0; i < pgdat->node_spanned_pages; i++) {
57 struct page *page;
58 if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
59 touch_nmi_watchdog();
60 if (pfn_valid(pgdat->node_start_pfn + i))
61 page = pfn_to_page(pgdat->node_start_pfn + i);
62 else {
63#ifdef CONFIG_VIRTUAL_MEM_MAP
64 if (max_gap < LARGE_GAP)
65 continue;
66#endif
67 i = vmemmap_find_next_valid_pfn(pgdat->node_id,
68 i) - 1;
69 continue;
70 }
71 if (PageReserved(page))
72 reserved++;
73 else if (PageSwapCache(page))
74 cached++;
75 else if (page_count(page))
76 shared += page_count(page)-1;
77 }
78 pgdat_resize_unlock(pgdat, &flags);
79 total_present += present;
80 total_reserved += reserved;
81 total_cached += cached;
82 total_shared += shared;
83 printk(KERN_INFO "Node %4d: RAM: %11ld, rsvd: %8d, "
84 "shrd: %10d, swpd: %10d\n", pgdat->node_id,
85 present, reserved, shared, cached);
86 }
87 printk(KERN_INFO "%ld pages of RAM\n", total_present);
88 printk(KERN_INFO "%d reserved pages\n", total_reserved);
89 printk(KERN_INFO "%d pages shared\n", total_shared);
90 printk(KERN_INFO "%d pages swap cached\n", total_cached);
91 printk(KERN_INFO "Total of %ld pages in page table cache\n",
92 quicklist_total_size());
93 printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages());
94}
95
96
97
98unsigned long bootmap_start;
99
100
101
102
103
104
105
106
107
108
109static int __init
110find_bootmap_location (u64 start, u64 end, void *arg)
111{
112 u64 needed = *(unsigned long *)arg;
113 u64 range_start, range_end, free_start;
114 int i;
115
116#if IGNORE_PFN0
117 if (start == PAGE_OFFSET) {
118 start += PAGE_SIZE;
119 if (start >= end)
120 return 0;
121 }
122#endif
123
124 free_start = PAGE_OFFSET;
125
126 for (i = 0; i < num_rsvd_regions; i++) {
127 range_start = max(start, free_start);
128 range_end = min(end, rsvd_region[i].start & PAGE_MASK);
129
130 free_start = PAGE_ALIGN(rsvd_region[i].end);
131
132 if (range_end <= range_start)
133 continue;
134
135 if (range_end - range_start >= needed) {
136 bootmap_start = __pa(range_start);
137 return -1;
138 }
139
140
141 if (range_end == end)
142 return 0;
143 }
144 return 0;
145}
146
147#ifdef CONFIG_SMP
148static void *cpu_data;
149
150
151
152
153
154void * __cpuinit
155per_cpu_init (void)
156{
157 int cpu;
158 static int first_time=1;
159
160
161
162
163
164
165 if (first_time) {
166 void *cpu0_data = __cpu0_per_cpu;
167
168 first_time=0;
169
170 __per_cpu_offset[0] = (char *) cpu0_data - __per_cpu_start;
171 per_cpu(local_per_cpu_offset, 0) = __per_cpu_offset[0];
172
173 for (cpu = 1; cpu < NR_CPUS; cpu++) {
174 memcpy(cpu_data, __phys_per_cpu_start, __per_cpu_end - __per_cpu_start);
175 __per_cpu_offset[cpu] = (char *) cpu_data - __per_cpu_start;
176 cpu_data += PERCPU_PAGE_SIZE;
177 per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu];
178 }
179 }
180 return __per_cpu_start + __per_cpu_offset[smp_processor_id()];
181}
182
183static inline void
184alloc_per_cpu_data(void)
185{
186 cpu_data = __alloc_bootmem(PERCPU_PAGE_SIZE * NR_CPUS-1,
187 PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS));
188}
189#else
190#define alloc_per_cpu_data() do { } while (0)
191#endif
192
193
194
195
196
197
198
199void __init
200find_memory (void)
201{
202 unsigned long bootmap_size;
203
204 reserve_memory();
205
206
207 min_low_pfn = ~0UL;
208 max_low_pfn = 0;
209 efi_memmap_walk(find_max_min_low_pfn, NULL);
210 max_pfn = max_low_pfn;
211
212 bootmap_size = bootmem_bootmap_pages(max_pfn) << PAGE_SHIFT;
213
214
215 bootmap_start = ~0UL;
216 efi_memmap_walk(find_bootmap_location, &bootmap_size);
217 if (bootmap_start == ~0UL)
218 panic("Cannot find %ld bytes for bootmap\n", bootmap_size);
219
220 bootmap_size = init_bootmem_node(NODE_DATA(0),
221 (bootmap_start >> PAGE_SHIFT), 0, max_pfn);
222
223
224 efi_memmap_walk(filter_rsvd_memory, free_bootmem);
225 reserve_bootmem(bootmap_start, bootmap_size, BOOTMEM_DEFAULT);
226
227 find_initrd();
228
229 alloc_per_cpu_data();
230}
231
232static int count_pages(u64 start, u64 end, void *arg)
233{
234 unsigned long *count = arg;
235
236 *count += (end - start) >> PAGE_SHIFT;
237 return 0;
238}
239
240
241
242
243
244void __init
245paging_init (void)
246{
247 unsigned long max_dma;
248 unsigned long max_zone_pfns[MAX_NR_ZONES];
249
250 num_physpages = 0;
251 efi_memmap_walk(count_pages, &num_physpages);
252
253 memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
254#ifdef CONFIG_ZONE_DMA
255 max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
256 max_zone_pfns[ZONE_DMA] = max_dma;
257#endif
258 max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
259
260#ifdef CONFIG_VIRTUAL_MEM_MAP
261 efi_memmap_walk(filter_memory, register_active_ranges);
262 efi_memmap_walk(find_largest_hole, (u64 *)&max_gap);
263 if (max_gap < LARGE_GAP) {
264 vmem_map = (struct page *) 0;
265 free_area_init_nodes(max_zone_pfns);
266 } else {
267 unsigned long map_size;
268
269
270
271 map_size = PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) *
272 sizeof(struct page));
273 vmalloc_end -= map_size;
274 vmem_map = (struct page *) vmalloc_end;
275 efi_memmap_walk(create_mem_map_page_table, NULL);
276
277
278
279
280
281 NODE_DATA(0)->node_mem_map = vmem_map +
282 find_min_pfn_with_active_regions();
283 free_area_init_nodes(max_zone_pfns);
284
285 printk("Virtual mem_map starts at 0x%p\n", mem_map);
286 }
287#else
288 add_active_range(0, 0, max_low_pfn);
289 free_area_init_nodes(max_zone_pfns);
290#endif
291 zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page));
292}
293