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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) 1998-2003 Hewlett-Packard Co
7 * David Mosberger-Tang <davidm@hpl.hp.com>
8 * Stephane Eranian <eranian@hpl.hp.com>
9 * Copyright (C) 2000, Rohit Seth <rohit.seth@intel.com>
10 * Copyright (C) 1999 VA Linux Systems
11 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
12 * Copyright (C) 2003 Silicon Graphics, Inc. All rights reserved.
13 *
14 * Routines used by ia64 machines with contiguous (or virtually contiguous)
15 * memory.
16 */
17#include <linux/bootmem.h>
18#include <linux/efi.h>
19#include <linux/memblock.h>
20#include <linux/mm.h>
21#include <linux/nmi.h>
22#include <linux/swap.h>
23
24#include <asm/meminit.h>
25#include <asm/pgalloc.h>
26#include <asm/pgtable.h>
27#include <asm/sections.h>
28#include <asm/mca.h>
29
30#ifdef CONFIG_VIRTUAL_MEM_MAP
31static unsigned long max_gap;
32#endif
33
34/* physical address where the bootmem map is located */
35unsigned long bootmap_start;
36
37/**
38 * find_bootmap_location - callback to find a memory area for the bootmap
39 * @start: start of region
40 * @end: end of region
41 * @arg: unused callback data
42 *
43 * Find a place to put the bootmap and return its starting address in
44 * bootmap_start. This address must be page-aligned.
45 */
46static int __init
47find_bootmap_location (u64 start, u64 end, void *arg)
48{
49 u64 needed = *(unsigned long *)arg;
50 u64 range_start, range_end, free_start;
51 int i;
52
53#if IGNORE_PFN0
54 if (start == PAGE_OFFSET) {
55 start += PAGE_SIZE;
56 if (start >= end)
57 return 0;
58 }
59#endif
60
61 free_start = PAGE_OFFSET;
62
63 for (i = 0; i < num_rsvd_regions; i++) {
64 range_start = max(start, free_start);
65 range_end = min(end, rsvd_region[i].start & PAGE_MASK);
66
67 free_start = PAGE_ALIGN(rsvd_region[i].end);
68
69 if (range_end <= range_start)
70 continue; /* skip over empty range */
71
72 if (range_end - range_start >= needed) {
73 bootmap_start = __pa(range_start);
74 return -1; /* done */
75 }
76
77 /* nothing more available in this segment */
78 if (range_end == end)
79 return 0;
80 }
81 return 0;
82}
83
84#ifdef CONFIG_SMP
85static void *cpu_data;
86/**
87 * per_cpu_init - setup per-cpu variables
88 *
89 * Allocate and setup per-cpu data areas.
90 */
91void *per_cpu_init(void)
92{
93 static bool first_time = true;
94 void *cpu0_data = __cpu0_per_cpu;
95 unsigned int cpu;
96
97 if (!first_time)
98 goto skip;
99 first_time = false;
100
101 /*
102 * get_free_pages() cannot be used before cpu_init() done.
103 * BSP allocates PERCPU_PAGE_SIZE bytes for all possible CPUs
104 * to avoid that AP calls get_zeroed_page().
105 */
106 for_each_possible_cpu(cpu) {
107 void *src = cpu == 0 ? cpu0_data : __phys_per_cpu_start;
108
109 memcpy(cpu_data, src, __per_cpu_end - __per_cpu_start);
110 __per_cpu_offset[cpu] = (char *)cpu_data - __per_cpu_start;
111 per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu];
112
113 /*
114 * percpu area for cpu0 is moved from the __init area
115 * which is setup by head.S and used till this point.
116 * Update ar.k3. This move is ensures that percpu
117 * area for cpu0 is on the correct node and its
118 * virtual address isn't insanely far from other
119 * percpu areas which is important for congruent
120 * percpu allocator.
121 */
122 if (cpu == 0)
123 ia64_set_kr(IA64_KR_PER_CPU_DATA, __pa(cpu_data) -
124 (unsigned long)__per_cpu_start);
125
126 cpu_data += PERCPU_PAGE_SIZE;
127 }
128skip:
129 return __per_cpu_start + __per_cpu_offset[smp_processor_id()];
130}
131
132static inline void
133alloc_per_cpu_data(void)
134{
135 cpu_data = __alloc_bootmem(PERCPU_PAGE_SIZE * num_possible_cpus(),
136 PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS));
137}
138
139/**
140 * setup_per_cpu_areas - setup percpu areas
141 *
142 * Arch code has already allocated and initialized percpu areas. All
143 * this function has to do is to teach the determined layout to the
144 * dynamic percpu allocator, which happens to be more complex than
145 * creating whole new ones using helpers.
146 */
147void __init
148setup_per_cpu_areas(void)
149{
150 struct pcpu_alloc_info *ai;
151 struct pcpu_group_info *gi;
152 unsigned int cpu;
153 ssize_t static_size, reserved_size, dyn_size;
154 int rc;
155
156 ai = pcpu_alloc_alloc_info(1, num_possible_cpus());
157 if (!ai)
158 panic("failed to allocate pcpu_alloc_info");
159 gi = &ai->groups[0];
160
161 /* units are assigned consecutively to possible cpus */
162 for_each_possible_cpu(cpu)
163 gi->cpu_map[gi->nr_units++] = cpu;
164
165 /* set parameters */
166 static_size = __per_cpu_end - __per_cpu_start;
167 reserved_size = PERCPU_MODULE_RESERVE;
168 dyn_size = PERCPU_PAGE_SIZE - static_size - reserved_size;
169 if (dyn_size < 0)
170 panic("percpu area overflow static=%zd reserved=%zd\n",
171 static_size, reserved_size);
172
173 ai->static_size = static_size;
174 ai->reserved_size = reserved_size;
175 ai->dyn_size = dyn_size;
176 ai->unit_size = PERCPU_PAGE_SIZE;
177 ai->atom_size = PAGE_SIZE;
178 ai->alloc_size = PERCPU_PAGE_SIZE;
179
180 rc = pcpu_setup_first_chunk(ai, __per_cpu_start + __per_cpu_offset[0]);
181 if (rc)
182 panic("failed to setup percpu area (err=%d)", rc);
183
184 pcpu_free_alloc_info(ai);
185}
186#else
187#define alloc_per_cpu_data() do { } while (0)
188#endif /* CONFIG_SMP */
189
190/**
191 * find_memory - setup memory map
192 *
193 * Walk the EFI memory map and find usable memory for the system, taking
194 * into account reserved areas.
195 */
196void __init
197find_memory (void)
198{
199 unsigned long bootmap_size;
200
201 reserve_memory();
202
203 /* first find highest page frame number */
204 min_low_pfn = ~0UL;
205 max_low_pfn = 0;
206 efi_memmap_walk(find_max_min_low_pfn, NULL);
207 max_pfn = max_low_pfn;
208 /* how many bytes to cover all the pages */
209 bootmap_size = bootmem_bootmap_pages(max_pfn) << PAGE_SHIFT;
210
211 /* look for a location to hold the bootmap */
212 bootmap_start = ~0UL;
213 efi_memmap_walk(find_bootmap_location, &bootmap_size);
214 if (bootmap_start == ~0UL)
215 panic("Cannot find %ld bytes for bootmap\n", bootmap_size);
216
217 bootmap_size = init_bootmem_node(NODE_DATA(0),
218 (bootmap_start >> PAGE_SHIFT), 0, max_pfn);
219
220 /* Free all available memory, then mark bootmem-map as being in use. */
221 efi_memmap_walk(filter_rsvd_memory, free_bootmem);
222 reserve_bootmem(bootmap_start, bootmap_size, BOOTMEM_DEFAULT);
223
224 find_initrd();
225
226 alloc_per_cpu_data();
227}
228
229/*
230 * Set up the page tables.
231 */
232
233void __init
234paging_init (void)
235{
236 unsigned long max_dma;
237 unsigned long max_zone_pfns[MAX_NR_ZONES];
238
239 memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
240#ifdef CONFIG_ZONE_DMA
241 max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
242 max_zone_pfns[ZONE_DMA] = max_dma;
243#endif
244 max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
245
246#ifdef CONFIG_VIRTUAL_MEM_MAP
247 efi_memmap_walk(filter_memory, register_active_ranges);
248 efi_memmap_walk(find_largest_hole, (u64 *)&max_gap);
249 if (max_gap < LARGE_GAP) {
250 vmem_map = (struct page *) 0;
251 free_area_init_nodes(max_zone_pfns);
252 } else {
253 unsigned long map_size;
254
255 /* allocate virtual_mem_map */
256
257 map_size = PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) *
258 sizeof(struct page));
259 VMALLOC_END -= map_size;
260 vmem_map = (struct page *) VMALLOC_END;
261 efi_memmap_walk(create_mem_map_page_table, NULL);
262
263 /*
264 * alloc_node_mem_map makes an adjustment for mem_map
265 * which isn't compatible with vmem_map.
266 */
267 NODE_DATA(0)->node_mem_map = vmem_map +
268 find_min_pfn_with_active_regions();
269 free_area_init_nodes(max_zone_pfns);
270
271 printk("Virtual mem_map starts at 0x%p\n", mem_map);
272 }
273#else /* !CONFIG_VIRTUAL_MEM_MAP */
274 memblock_add_node(0, PFN_PHYS(max_low_pfn), 0);
275 free_area_init_nodes(max_zone_pfns);
276#endif /* !CONFIG_VIRTUAL_MEM_MAP */
277 zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page));
278}
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) 1998-2003 Hewlett-Packard Co
7 * David Mosberger-Tang <davidm@hpl.hp.com>
8 * Stephane Eranian <eranian@hpl.hp.com>
9 * Copyright (C) 2000, Rohit Seth <rohit.seth@intel.com>
10 * Copyright (C) 1999 VA Linux Systems
11 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
12 * Copyright (C) 2003 Silicon Graphics, Inc. All rights reserved.
13 *
14 * Routines used by ia64 machines with contiguous (or virtually contiguous)
15 * memory.
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 * show_mem - give short summary of memory stats
35 *
36 * Shows a simple page count of reserved and used pages in the system.
37 * For discontig machines, it does this on a per-pgdat basis.
38 */
39void show_mem(unsigned int filter)
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(filter);
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 int nid = pgdat->node_id;
54
55 if (skip_free_areas_node(filter, nid))
56 continue;
57 pgdat_resize_lock(pgdat, &flags);
58 present = pgdat->node_present_pages;
59 for(i = 0; i < pgdat->node_spanned_pages; i++) {
60 struct page *page;
61 if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
62 touch_nmi_watchdog();
63 if (pfn_valid(pgdat->node_start_pfn + i))
64 page = pfn_to_page(pgdat->node_start_pfn + i);
65 else {
66#ifdef CONFIG_VIRTUAL_MEM_MAP
67 if (max_gap < LARGE_GAP)
68 continue;
69#endif
70 i = vmemmap_find_next_valid_pfn(nid, i) - 1;
71 continue;
72 }
73 if (PageReserved(page))
74 reserved++;
75 else if (PageSwapCache(page))
76 cached++;
77 else if (page_count(page))
78 shared += page_count(page)-1;
79 }
80 pgdat_resize_unlock(pgdat, &flags);
81 total_present += present;
82 total_reserved += reserved;
83 total_cached += cached;
84 total_shared += shared;
85 printk(KERN_INFO "Node %4d: RAM: %11ld, rsvd: %8d, "
86 "shrd: %10d, swpd: %10d\n", nid,
87 present, reserved, shared, cached);
88 }
89 printk(KERN_INFO "%ld pages of RAM\n", total_present);
90 printk(KERN_INFO "%d reserved pages\n", total_reserved);
91 printk(KERN_INFO "%d pages shared\n", total_shared);
92 printk(KERN_INFO "%d pages swap cached\n", total_cached);
93 printk(KERN_INFO "Total of %ld pages in page table cache\n",
94 quicklist_total_size());
95 printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages());
96}
97
98
99/* physical address where the bootmem map is located */
100unsigned long bootmap_start;
101
102/**
103 * find_bootmap_location - callback to find a memory area for the bootmap
104 * @start: start of region
105 * @end: end of region
106 * @arg: unused callback data
107 *
108 * Find a place to put the bootmap and return its starting address in
109 * bootmap_start. This address must be page-aligned.
110 */
111static int __init
112find_bootmap_location (u64 start, u64 end, void *arg)
113{
114 u64 needed = *(unsigned long *)arg;
115 u64 range_start, range_end, free_start;
116 int i;
117
118#if IGNORE_PFN0
119 if (start == PAGE_OFFSET) {
120 start += PAGE_SIZE;
121 if (start >= end)
122 return 0;
123 }
124#endif
125
126 free_start = PAGE_OFFSET;
127
128 for (i = 0; i < num_rsvd_regions; i++) {
129 range_start = max(start, free_start);
130 range_end = min(end, rsvd_region[i].start & PAGE_MASK);
131
132 free_start = PAGE_ALIGN(rsvd_region[i].end);
133
134 if (range_end <= range_start)
135 continue; /* skip over empty range */
136
137 if (range_end - range_start >= needed) {
138 bootmap_start = __pa(range_start);
139 return -1; /* done */
140 }
141
142 /* nothing more available in this segment */
143 if (range_end == end)
144 return 0;
145 }
146 return 0;
147}
148
149#ifdef CONFIG_SMP
150static void *cpu_data;
151/**
152 * per_cpu_init - setup per-cpu variables
153 *
154 * Allocate and setup per-cpu data areas.
155 */
156void * __cpuinit
157per_cpu_init (void)
158{
159 static bool first_time = true;
160 void *cpu0_data = __cpu0_per_cpu;
161 unsigned int cpu;
162
163 if (!first_time)
164 goto skip;
165 first_time = false;
166
167 /*
168 * get_free_pages() cannot be used before cpu_init() done.
169 * BSP allocates PERCPU_PAGE_SIZE bytes for all possible CPUs
170 * to avoid that AP calls get_zeroed_page().
171 */
172 for_each_possible_cpu(cpu) {
173 void *src = cpu == 0 ? cpu0_data : __phys_per_cpu_start;
174
175 memcpy(cpu_data, src, __per_cpu_end - __per_cpu_start);
176 __per_cpu_offset[cpu] = (char *)cpu_data - __per_cpu_start;
177 per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu];
178
179 /*
180 * percpu area for cpu0 is moved from the __init area
181 * which is setup by head.S and used till this point.
182 * Update ar.k3. This move is ensures that percpu
183 * area for cpu0 is on the correct node and its
184 * virtual address isn't insanely far from other
185 * percpu areas which is important for congruent
186 * percpu allocator.
187 */
188 if (cpu == 0)
189 ia64_set_kr(IA64_KR_PER_CPU_DATA, __pa(cpu_data) -
190 (unsigned long)__per_cpu_start);
191
192 cpu_data += PERCPU_PAGE_SIZE;
193 }
194skip:
195 return __per_cpu_start + __per_cpu_offset[smp_processor_id()];
196}
197
198static inline void
199alloc_per_cpu_data(void)
200{
201 cpu_data = __alloc_bootmem(PERCPU_PAGE_SIZE * num_possible_cpus(),
202 PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS));
203}
204
205/**
206 * setup_per_cpu_areas - setup percpu areas
207 *
208 * Arch code has already allocated and initialized percpu areas. All
209 * this function has to do is to teach the determined layout to the
210 * dynamic percpu allocator, which happens to be more complex than
211 * creating whole new ones using helpers.
212 */
213void __init
214setup_per_cpu_areas(void)
215{
216 struct pcpu_alloc_info *ai;
217 struct pcpu_group_info *gi;
218 unsigned int cpu;
219 ssize_t static_size, reserved_size, dyn_size;
220 int rc;
221
222 ai = pcpu_alloc_alloc_info(1, num_possible_cpus());
223 if (!ai)
224 panic("failed to allocate pcpu_alloc_info");
225 gi = &ai->groups[0];
226
227 /* units are assigned consecutively to possible cpus */
228 for_each_possible_cpu(cpu)
229 gi->cpu_map[gi->nr_units++] = cpu;
230
231 /* set parameters */
232 static_size = __per_cpu_end - __per_cpu_start;
233 reserved_size = PERCPU_MODULE_RESERVE;
234 dyn_size = PERCPU_PAGE_SIZE - static_size - reserved_size;
235 if (dyn_size < 0)
236 panic("percpu area overflow static=%zd reserved=%zd\n",
237 static_size, reserved_size);
238
239 ai->static_size = static_size;
240 ai->reserved_size = reserved_size;
241 ai->dyn_size = dyn_size;
242 ai->unit_size = PERCPU_PAGE_SIZE;
243 ai->atom_size = PAGE_SIZE;
244 ai->alloc_size = PERCPU_PAGE_SIZE;
245
246 rc = pcpu_setup_first_chunk(ai, __per_cpu_start + __per_cpu_offset[0]);
247 if (rc)
248 panic("failed to setup percpu area (err=%d)", rc);
249
250 pcpu_free_alloc_info(ai);
251}
252#else
253#define alloc_per_cpu_data() do { } while (0)
254#endif /* CONFIG_SMP */
255
256/**
257 * find_memory - setup memory map
258 *
259 * Walk the EFI memory map and find usable memory for the system, taking
260 * into account reserved areas.
261 */
262void __init
263find_memory (void)
264{
265 unsigned long bootmap_size;
266
267 reserve_memory();
268
269 /* first find highest page frame number */
270 min_low_pfn = ~0UL;
271 max_low_pfn = 0;
272 efi_memmap_walk(find_max_min_low_pfn, NULL);
273 max_pfn = max_low_pfn;
274 /* how many bytes to cover all the pages */
275 bootmap_size = bootmem_bootmap_pages(max_pfn) << PAGE_SHIFT;
276
277 /* look for a location to hold the bootmap */
278 bootmap_start = ~0UL;
279 efi_memmap_walk(find_bootmap_location, &bootmap_size);
280 if (bootmap_start == ~0UL)
281 panic("Cannot find %ld bytes for bootmap\n", bootmap_size);
282
283 bootmap_size = init_bootmem_node(NODE_DATA(0),
284 (bootmap_start >> PAGE_SHIFT), 0, max_pfn);
285
286 /* Free all available memory, then mark bootmem-map as being in use. */
287 efi_memmap_walk(filter_rsvd_memory, free_bootmem);
288 reserve_bootmem(bootmap_start, bootmap_size, BOOTMEM_DEFAULT);
289
290 find_initrd();
291
292 alloc_per_cpu_data();
293}
294
295static int count_pages(u64 start, u64 end, void *arg)
296{
297 unsigned long *count = arg;
298
299 *count += (end - start) >> PAGE_SHIFT;
300 return 0;
301}
302
303/*
304 * Set up the page tables.
305 */
306
307void __init
308paging_init (void)
309{
310 unsigned long max_dma;
311 unsigned long max_zone_pfns[MAX_NR_ZONES];
312
313 num_physpages = 0;
314 efi_memmap_walk(count_pages, &num_physpages);
315
316 memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
317#ifdef CONFIG_ZONE_DMA
318 max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
319 max_zone_pfns[ZONE_DMA] = max_dma;
320#endif
321 max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
322
323#ifdef CONFIG_VIRTUAL_MEM_MAP
324 efi_memmap_walk(filter_memory, register_active_ranges);
325 efi_memmap_walk(find_largest_hole, (u64 *)&max_gap);
326 if (max_gap < LARGE_GAP) {
327 vmem_map = (struct page *) 0;
328 free_area_init_nodes(max_zone_pfns);
329 } else {
330 unsigned long map_size;
331
332 /* allocate virtual_mem_map */
333
334 map_size = PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) *
335 sizeof(struct page));
336 VMALLOC_END -= map_size;
337 vmem_map = (struct page *) VMALLOC_END;
338 efi_memmap_walk(create_mem_map_page_table, NULL);
339
340 /*
341 * alloc_node_mem_map makes an adjustment for mem_map
342 * which isn't compatible with vmem_map.
343 */
344 NODE_DATA(0)->node_mem_map = vmem_map +
345 find_min_pfn_with_active_regions();
346 free_area_init_nodes(max_zone_pfns);
347
348 printk("Virtual mem_map starts at 0x%p\n", mem_map);
349 }
350#else /* !CONFIG_VIRTUAL_MEM_MAP */
351 add_active_range(0, 0, max_low_pfn);
352 free_area_init_nodes(max_zone_pfns);
353#endif /* !CONFIG_VIRTUAL_MEM_MAP */
354 zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page));
355}