]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/parisc/mm/init.c | |
3 | * | |
4 | * Copyright (C) 1995 Linus Torvalds | |
5 | * Copyright 1999 SuSE GmbH | |
6 | * changed by Philipp Rumpf | |
7 | * Copyright 1999 Philipp Rumpf (prumpf@tux.org) | |
8 | * Copyright 2004 Randolph Chung (tausq@debian.org) | |
a8f44e38 | 9 | * Copyright 2006-2007 Helge Deller (deller@gmx.de) |
1da177e4 LT |
10 | * |
11 | */ | |
12 | ||
1da177e4 LT |
13 | |
14 | #include <linux/module.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/bootmem.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/pci.h> /* for hppa_dma_ops and pcxl_dma_ops */ | |
20 | #include <linux/initrd.h> | |
21 | #include <linux/swap.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/nodemask.h> /* for node_online_map */ | |
24 | #include <linux/pagemap.h> /* for release_pages and page_cache_release */ | |
25 | ||
26 | #include <asm/pgalloc.h> | |
ce8420bb | 27 | #include <asm/pgtable.h> |
1da177e4 LT |
28 | #include <asm/tlb.h> |
29 | #include <asm/pdc_chassis.h> | |
30 | #include <asm/mmzone.h> | |
a581c2a4 | 31 | #include <asm/sections.h> |
1da177e4 LT |
32 | |
33 | DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); | |
34 | ||
1da177e4 | 35 | extern int data_start; |
1da177e4 LT |
36 | |
37 | #ifdef CONFIG_DISCONTIGMEM | |
8039de10 HD |
38 | struct node_map_data node_data[MAX_NUMNODES] __read_mostly; |
39 | bootmem_data_t bmem_data[MAX_NUMNODES] __read_mostly; | |
40 | unsigned char pfnnid_map[PFNNID_MAP_MAX] __read_mostly; | |
1da177e4 LT |
41 | #endif |
42 | ||
43 | static struct resource data_resource = { | |
44 | .name = "Kernel data", | |
45 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
46 | }; | |
47 | ||
48 | static struct resource code_resource = { | |
49 | .name = "Kernel code", | |
50 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
51 | }; | |
52 | ||
53 | static struct resource pdcdata_resource = { | |
54 | .name = "PDC data (Page Zero)", | |
55 | .start = 0, | |
56 | .end = 0x9ff, | |
57 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
58 | }; | |
59 | ||
8039de10 | 60 | static struct resource sysram_resources[MAX_PHYSMEM_RANGES] __read_mostly; |
1da177e4 LT |
61 | |
62 | /* The following array is initialized from the firmware specific | |
63 | * information retrieved in kernel/inventory.c. | |
64 | */ | |
65 | ||
8039de10 HD |
66 | physmem_range_t pmem_ranges[MAX_PHYSMEM_RANGES] __read_mostly; |
67 | int npmem_ranges __read_mostly; | |
1da177e4 | 68 | |
a8f44e38 | 69 | #ifdef CONFIG_64BIT |
1da177e4 | 70 | #define MAX_MEM (~0UL) |
a8f44e38 | 71 | #else /* !CONFIG_64BIT */ |
1da177e4 | 72 | #define MAX_MEM (3584U*1024U*1024U) |
a8f44e38 | 73 | #endif /* !CONFIG_64BIT */ |
1da177e4 | 74 | |
8039de10 | 75 | static unsigned long mem_limit __read_mostly = MAX_MEM; |
1da177e4 LT |
76 | |
77 | static void __init mem_limit_func(void) | |
78 | { | |
79 | char *cp, *end; | |
80 | unsigned long limit; | |
1da177e4 LT |
81 | |
82 | /* We need this before __setup() functions are called */ | |
83 | ||
84 | limit = MAX_MEM; | |
668f9931 | 85 | for (cp = boot_command_line; *cp; ) { |
1da177e4 LT |
86 | if (memcmp(cp, "mem=", 4) == 0) { |
87 | cp += 4; | |
88 | limit = memparse(cp, &end); | |
89 | if (end != cp) | |
90 | break; | |
91 | cp = end; | |
92 | } else { | |
93 | while (*cp != ' ' && *cp) | |
94 | ++cp; | |
95 | while (*cp == ' ') | |
96 | ++cp; | |
97 | } | |
98 | } | |
99 | ||
100 | if (limit < mem_limit) | |
101 | mem_limit = limit; | |
102 | } | |
103 | ||
104 | #define MAX_GAP (0x40000000UL >> PAGE_SHIFT) | |
105 | ||
106 | static void __init setup_bootmem(void) | |
107 | { | |
108 | unsigned long bootmap_size; | |
109 | unsigned long mem_max; | |
110 | unsigned long bootmap_pages; | |
111 | unsigned long bootmap_start_pfn; | |
112 | unsigned long bootmap_pfn; | |
113 | #ifndef CONFIG_DISCONTIGMEM | |
114 | physmem_range_t pmem_holes[MAX_PHYSMEM_RANGES - 1]; | |
115 | int npmem_holes; | |
116 | #endif | |
117 | int i, sysram_resource_count; | |
118 | ||
119 | disable_sr_hashing(); /* Turn off space register hashing */ | |
120 | ||
121 | /* | |
122 | * Sort the ranges. Since the number of ranges is typically | |
123 | * small, and performance is not an issue here, just do | |
124 | * a simple insertion sort. | |
125 | */ | |
126 | ||
127 | for (i = 1; i < npmem_ranges; i++) { | |
128 | int j; | |
129 | ||
130 | for (j = i; j > 0; j--) { | |
131 | unsigned long tmp; | |
132 | ||
133 | if (pmem_ranges[j-1].start_pfn < | |
134 | pmem_ranges[j].start_pfn) { | |
135 | ||
136 | break; | |
137 | } | |
138 | tmp = pmem_ranges[j-1].start_pfn; | |
139 | pmem_ranges[j-1].start_pfn = pmem_ranges[j].start_pfn; | |
140 | pmem_ranges[j].start_pfn = tmp; | |
141 | tmp = pmem_ranges[j-1].pages; | |
142 | pmem_ranges[j-1].pages = pmem_ranges[j].pages; | |
143 | pmem_ranges[j].pages = tmp; | |
144 | } | |
145 | } | |
146 | ||
147 | #ifndef CONFIG_DISCONTIGMEM | |
148 | /* | |
149 | * Throw out ranges that are too far apart (controlled by | |
150 | * MAX_GAP). | |
151 | */ | |
152 | ||
153 | for (i = 1; i < npmem_ranges; i++) { | |
154 | if (pmem_ranges[i].start_pfn - | |
155 | (pmem_ranges[i-1].start_pfn + | |
156 | pmem_ranges[i-1].pages) > MAX_GAP) { | |
157 | npmem_ranges = i; | |
158 | printk("Large gap in memory detected (%ld pages). " | |
159 | "Consider turning on CONFIG_DISCONTIGMEM\n", | |
160 | pmem_ranges[i].start_pfn - | |
161 | (pmem_ranges[i-1].start_pfn + | |
162 | pmem_ranges[i-1].pages)); | |
163 | break; | |
164 | } | |
165 | } | |
166 | #endif | |
167 | ||
168 | if (npmem_ranges > 1) { | |
169 | ||
170 | /* Print the memory ranges */ | |
171 | ||
172 | printk(KERN_INFO "Memory Ranges:\n"); | |
173 | ||
174 | for (i = 0; i < npmem_ranges; i++) { | |
175 | unsigned long start; | |
176 | unsigned long size; | |
177 | ||
178 | size = (pmem_ranges[i].pages << PAGE_SHIFT); | |
179 | start = (pmem_ranges[i].start_pfn << PAGE_SHIFT); | |
180 | printk(KERN_INFO "%2d) Start 0x%016lx End 0x%016lx Size %6ld MB\n", | |
181 | i,start, start + (size - 1), size >> 20); | |
182 | } | |
183 | } | |
184 | ||
185 | sysram_resource_count = npmem_ranges; | |
186 | for (i = 0; i < sysram_resource_count; i++) { | |
187 | struct resource *res = &sysram_resources[i]; | |
188 | res->name = "System RAM"; | |
189 | res->start = pmem_ranges[i].start_pfn << PAGE_SHIFT; | |
190 | res->end = res->start + (pmem_ranges[i].pages << PAGE_SHIFT)-1; | |
191 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
192 | request_resource(&iomem_resource, res); | |
193 | } | |
194 | ||
195 | /* | |
196 | * For 32 bit kernels we limit the amount of memory we can | |
197 | * support, in order to preserve enough kernel address space | |
198 | * for other purposes. For 64 bit kernels we don't normally | |
199 | * limit the memory, but this mechanism can be used to | |
200 | * artificially limit the amount of memory (and it is written | |
201 | * to work with multiple memory ranges). | |
202 | */ | |
203 | ||
204 | mem_limit_func(); /* check for "mem=" argument */ | |
205 | ||
206 | mem_max = 0; | |
207 | num_physpages = 0; | |
208 | for (i = 0; i < npmem_ranges; i++) { | |
209 | unsigned long rsize; | |
210 | ||
211 | rsize = pmem_ranges[i].pages << PAGE_SHIFT; | |
212 | if ((mem_max + rsize) > mem_limit) { | |
213 | printk(KERN_WARNING "Memory truncated to %ld MB\n", mem_limit >> 20); | |
214 | if (mem_max == mem_limit) | |
215 | npmem_ranges = i; | |
216 | else { | |
217 | pmem_ranges[i].pages = (mem_limit >> PAGE_SHIFT) | |
218 | - (mem_max >> PAGE_SHIFT); | |
219 | npmem_ranges = i + 1; | |
220 | mem_max = mem_limit; | |
221 | } | |
222 | num_physpages += pmem_ranges[i].pages; | |
223 | break; | |
224 | } | |
225 | num_physpages += pmem_ranges[i].pages; | |
226 | mem_max += rsize; | |
227 | } | |
228 | ||
229 | printk(KERN_INFO "Total Memory: %ld MB\n",mem_max >> 20); | |
230 | ||
231 | #ifndef CONFIG_DISCONTIGMEM | |
232 | /* Merge the ranges, keeping track of the holes */ | |
233 | ||
234 | { | |
235 | unsigned long end_pfn; | |
236 | unsigned long hole_pages; | |
237 | ||
238 | npmem_holes = 0; | |
239 | end_pfn = pmem_ranges[0].start_pfn + pmem_ranges[0].pages; | |
240 | for (i = 1; i < npmem_ranges; i++) { | |
241 | ||
242 | hole_pages = pmem_ranges[i].start_pfn - end_pfn; | |
243 | if (hole_pages) { | |
244 | pmem_holes[npmem_holes].start_pfn = end_pfn; | |
245 | pmem_holes[npmem_holes++].pages = hole_pages; | |
246 | end_pfn += hole_pages; | |
247 | } | |
248 | end_pfn += pmem_ranges[i].pages; | |
249 | } | |
250 | ||
251 | pmem_ranges[0].pages = end_pfn - pmem_ranges[0].start_pfn; | |
252 | npmem_ranges = 1; | |
253 | } | |
254 | #endif | |
255 | ||
256 | bootmap_pages = 0; | |
257 | for (i = 0; i < npmem_ranges; i++) | |
258 | bootmap_pages += bootmem_bootmap_pages(pmem_ranges[i].pages); | |
259 | ||
260 | bootmap_start_pfn = PAGE_ALIGN(__pa((unsigned long) &_end)) >> PAGE_SHIFT; | |
261 | ||
262 | #ifdef CONFIG_DISCONTIGMEM | |
263 | for (i = 0; i < MAX_PHYSMEM_RANGES; i++) { | |
264 | memset(NODE_DATA(i), 0, sizeof(pg_data_t)); | |
265 | NODE_DATA(i)->bdata = &bmem_data[i]; | |
266 | } | |
267 | memset(pfnnid_map, 0xff, sizeof(pfnnid_map)); | |
268 | ||
269 | for (i = 0; i < npmem_ranges; i++) | |
270 | node_set_online(i); | |
271 | #endif | |
272 | ||
273 | /* | |
274 | * Initialize and free the full range of memory in each range. | |
275 | * Note that the only writing these routines do are to the bootmap, | |
276 | * and we've made sure to locate the bootmap properly so that they | |
277 | * won't be writing over anything important. | |
278 | */ | |
279 | ||
280 | bootmap_pfn = bootmap_start_pfn; | |
281 | max_pfn = 0; | |
282 | for (i = 0; i < npmem_ranges; i++) { | |
283 | unsigned long start_pfn; | |
284 | unsigned long npages; | |
285 | ||
286 | start_pfn = pmem_ranges[i].start_pfn; | |
287 | npages = pmem_ranges[i].pages; | |
288 | ||
289 | bootmap_size = init_bootmem_node(NODE_DATA(i), | |
290 | bootmap_pfn, | |
291 | start_pfn, | |
292 | (start_pfn + npages) ); | |
293 | free_bootmem_node(NODE_DATA(i), | |
294 | (start_pfn << PAGE_SHIFT), | |
295 | (npages << PAGE_SHIFT) ); | |
296 | bootmap_pfn += (bootmap_size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
297 | if ((start_pfn + npages) > max_pfn) | |
298 | max_pfn = start_pfn + npages; | |
299 | } | |
300 | ||
5cdb8205 GG |
301 | /* IOMMU is always used to access "high mem" on those boxes |
302 | * that can support enough mem that a PCI device couldn't | |
303 | * directly DMA to any physical addresses. | |
304 | * ISA DMA support will need to revisit this. | |
305 | */ | |
306 | max_low_pfn = max_pfn; | |
307 | ||
1da177e4 LT |
308 | if ((bootmap_pfn - bootmap_start_pfn) != bootmap_pages) { |
309 | printk(KERN_WARNING "WARNING! bootmap sizing is messed up!\n"); | |
310 | BUG(); | |
311 | } | |
312 | ||
313 | /* reserve PAGE0 pdc memory, kernel text/data/bss & bootmap */ | |
314 | ||
315 | #define PDC_CONSOLE_IO_IODC_SIZE 32768 | |
316 | ||
317 | reserve_bootmem_node(NODE_DATA(0), 0UL, | |
318 | (unsigned long)(PAGE0->mem_free + PDC_CONSOLE_IO_IODC_SIZE)); | |
c51d476a KM |
319 | reserve_bootmem_node(NODE_DATA(0), __pa((unsigned long)_text), |
320 | (unsigned long)(_end - _text)); | |
1da177e4 LT |
321 | reserve_bootmem_node(NODE_DATA(0), (bootmap_start_pfn << PAGE_SHIFT), |
322 | ((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT)); | |
323 | ||
324 | #ifndef CONFIG_DISCONTIGMEM | |
325 | ||
326 | /* reserve the holes */ | |
327 | ||
328 | for (i = 0; i < npmem_holes; i++) { | |
329 | reserve_bootmem_node(NODE_DATA(0), | |
330 | (pmem_holes[i].start_pfn << PAGE_SHIFT), | |
331 | (pmem_holes[i].pages << PAGE_SHIFT)); | |
332 | } | |
333 | #endif | |
334 | ||
335 | #ifdef CONFIG_BLK_DEV_INITRD | |
336 | if (initrd_start) { | |
337 | printk(KERN_INFO "initrd: %08lx-%08lx\n", initrd_start, initrd_end); | |
338 | if (__pa(initrd_start) < mem_max) { | |
339 | unsigned long initrd_reserve; | |
340 | ||
341 | if (__pa(initrd_end) > mem_max) { | |
342 | initrd_reserve = mem_max - __pa(initrd_start); | |
343 | } else { | |
344 | initrd_reserve = initrd_end - initrd_start; | |
345 | } | |
346 | initrd_below_start_ok = 1; | |
347 | printk(KERN_INFO "initrd: reserving %08lx-%08lx (mem_max %08lx)\n", __pa(initrd_start), __pa(initrd_start) + initrd_reserve, mem_max); | |
348 | ||
349 | reserve_bootmem_node(NODE_DATA(0),__pa(initrd_start), initrd_reserve); | |
350 | } | |
351 | } | |
352 | #endif | |
353 | ||
354 | data_resource.start = virt_to_phys(&data_start); | |
c51d476a KM |
355 | data_resource.end = virt_to_phys(_end) - 1; |
356 | code_resource.start = virt_to_phys(_text); | |
1da177e4 LT |
357 | code_resource.end = virt_to_phys(&data_start)-1; |
358 | ||
359 | /* We don't know which region the kernel will be in, so try | |
360 | * all of them. | |
361 | */ | |
362 | for (i = 0; i < sysram_resource_count; i++) { | |
363 | struct resource *res = &sysram_resources[i]; | |
364 | request_resource(res, &code_resource); | |
365 | request_resource(res, &data_resource); | |
366 | } | |
367 | request_resource(&sysram_resources[0], &pdcdata_resource); | |
368 | } | |
369 | ||
370 | void free_initmem(void) | |
371 | { | |
2fd83038 HD |
372 | unsigned long addr, init_begin, init_end; |
373 | ||
1da177e4 LT |
374 | printk(KERN_INFO "Freeing unused kernel memory: "); |
375 | ||
81a3de3e | 376 | #ifdef CONFIG_DEBUG_KERNEL |
1da177e4 LT |
377 | /* Attempt to catch anyone trying to execute code here |
378 | * by filling the page with BRK insns. | |
379 | * | |
380 | * If we disable interrupts for all CPUs, then IPI stops working. | |
381 | * Kinda breaks the global cache flushing. | |
382 | */ | |
383 | local_irq_disable(); | |
384 | ||
c51d476a KM |
385 | memset(__init_begin, 0x00, |
386 | (unsigned long)__init_end - (unsigned long)__init_begin); | |
1da177e4 LT |
387 | |
388 | flush_data_cache(); | |
389 | asm volatile("sync" : : ); | |
c51d476a | 390 | flush_icache_range((unsigned long)__init_begin, (unsigned long)__init_end); |
1da177e4 LT |
391 | asm volatile("sync" : : ); |
392 | ||
393 | local_irq_enable(); | |
394 | #endif | |
395 | ||
2fd83038 HD |
396 | /* align __init_begin and __init_end to page size, |
397 | ignoring linker script where we might have tried to save RAM */ | |
c51d476a KM |
398 | init_begin = PAGE_ALIGN((unsigned long)(__init_begin)); |
399 | init_end = PAGE_ALIGN((unsigned long)(__init_end)); | |
2fd83038 | 400 | for (addr = init_begin; addr < init_end; addr += PAGE_SIZE) { |
1da177e4 | 401 | ClearPageReserved(virt_to_page(addr)); |
7835e98b | 402 | init_page_count(virt_to_page(addr)); |
1da177e4 LT |
403 | free_page(addr); |
404 | num_physpages++; | |
405 | totalram_pages++; | |
406 | } | |
407 | ||
408 | /* set up a new led state on systems shipped LED State panel */ | |
409 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE); | |
410 | ||
2fd83038 | 411 | printk("%luk freed\n", (init_end - init_begin) >> 10); |
1da177e4 LT |
412 | } |
413 | ||
1bcdd854 HD |
414 | |
415 | #ifdef CONFIG_DEBUG_RODATA | |
416 | void mark_rodata_ro(void) | |
417 | { | |
1bcdd854 HD |
418 | /* rodata memory was already mapped with KERNEL_RO access rights by |
419 | pagetable_init() and map_pages(). No need to do additional stuff here */ | |
420 | printk (KERN_INFO "Write protecting the kernel read-only data: %luk\n", | |
a581c2a4 | 421 | (unsigned long)(__end_rodata - __start_rodata) >> 10); |
1bcdd854 HD |
422 | } |
423 | #endif | |
424 | ||
425 | ||
1da177e4 LT |
426 | /* |
427 | * Just an arbitrary offset to serve as a "hole" between mapping areas | |
428 | * (between top of physical memory and a potential pcxl dma mapping | |
429 | * area, and below the vmalloc mapping area). | |
430 | * | |
431 | * The current 32K value just means that there will be a 32K "hole" | |
432 | * between mapping areas. That means that any out-of-bounds memory | |
433 | * accesses will hopefully be caught. The vmalloc() routines leaves | |
434 | * a hole of 4kB between each vmalloced area for the same reason. | |
435 | */ | |
436 | ||
437 | /* Leave room for gateway page expansion */ | |
438 | #if KERNEL_MAP_START < GATEWAY_PAGE_SIZE | |
439 | #error KERNEL_MAP_START is in gateway reserved region | |
440 | #endif | |
441 | #define MAP_START (KERNEL_MAP_START) | |
442 | ||
443 | #define VM_MAP_OFFSET (32*1024) | |
444 | #define SET_MAP_OFFSET(x) ((void *)(((unsigned long)(x) + VM_MAP_OFFSET) \ | |
445 | & ~(VM_MAP_OFFSET-1))) | |
446 | ||
8039de10 | 447 | void *vmalloc_start __read_mostly; |
1da177e4 LT |
448 | EXPORT_SYMBOL(vmalloc_start); |
449 | ||
450 | #ifdef CONFIG_PA11 | |
8039de10 | 451 | unsigned long pcxl_dma_start __read_mostly; |
1da177e4 LT |
452 | #endif |
453 | ||
454 | void __init mem_init(void) | |
455 | { | |
ce8420bb | 456 | int codesize, reservedpages, datasize, initsize; |
ce8420bb | 457 | |
1da177e4 LT |
458 | high_memory = __va((max_pfn << PAGE_SHIFT)); |
459 | ||
460 | #ifndef CONFIG_DISCONTIGMEM | |
461 | max_mapnr = page_to_pfn(virt_to_page(high_memory - 1)) + 1; | |
462 | totalram_pages += free_all_bootmem(); | |
463 | #else | |
464 | { | |
465 | int i; | |
466 | ||
467 | for (i = 0; i < npmem_ranges; i++) | |
468 | totalram_pages += free_all_bootmem_node(NODE_DATA(i)); | |
469 | } | |
470 | #endif | |
471 | ||
53faf291 KM |
472 | codesize = (unsigned long)_etext - (unsigned long)_text; |
473 | datasize = (unsigned long)_edata - (unsigned long)_etext; | |
474 | initsize = (unsigned long)__init_end - (unsigned long)__init_begin; | |
ce8420bb HD |
475 | |
476 | reservedpages = 0; | |
53faf291 KM |
477 | { |
478 | unsigned long pfn; | |
479 | #ifdef CONFIG_DISCONTIGMEM | |
480 | int i; | |
481 | ||
482 | for (i = 0; i < npmem_ranges; i++) { | |
483 | for (pfn = node_start_pfn(i); pfn < node_end_pfn(i); pfn++) { | |
484 | if (PageReserved(pfn_to_page(pfn))) | |
485 | reservedpages++; | |
486 | } | |
487 | } | |
488 | #else /* !CONFIG_DISCONTIGMEM */ | |
489 | for (pfn = 0; pfn < max_pfn; pfn++) { | |
ce8420bb HD |
490 | /* |
491 | * Only count reserved RAM pages | |
492 | */ | |
53faf291 | 493 | if (PageReserved(pfn_to_page(pfn))) |
ce8420bb | 494 | reservedpages++; |
53faf291 KM |
495 | } |
496 | #endif | |
497 | } | |
1da177e4 LT |
498 | |
499 | #ifdef CONFIG_PA11 | |
500 | if (hppa_dma_ops == &pcxl_dma_ops) { | |
501 | pcxl_dma_start = (unsigned long)SET_MAP_OFFSET(MAP_START); | |
502 | vmalloc_start = SET_MAP_OFFSET(pcxl_dma_start + PCXL_DMA_MAP_SIZE); | |
503 | } else { | |
504 | pcxl_dma_start = 0; | |
505 | vmalloc_start = SET_MAP_OFFSET(MAP_START); | |
506 | } | |
507 | #else | |
508 | vmalloc_start = SET_MAP_OFFSET(MAP_START); | |
509 | #endif | |
510 | ||
53faf291 KM |
511 | printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init)\n", |
512 | (unsigned long)nr_free_pages() << (PAGE_SHIFT-10), | |
ce8420bb HD |
513 | num_physpages << (PAGE_SHIFT-10), |
514 | codesize >> 10, | |
515 | reservedpages << (PAGE_SHIFT-10), | |
516 | datasize >> 10, | |
53faf291 KM |
517 | initsize >> 10 |
518 | ); | |
ce8420bb HD |
519 | |
520 | #ifdef CONFIG_DEBUG_KERNEL /* double-sanity-check paranoia */ | |
521 | printk("virtual kernel memory layout:\n" | |
522 | " vmalloc : 0x%p - 0x%p (%4ld MB)\n" | |
53faf291 | 523 | " memory : 0x%p - 0x%p (%4ld MB)\n" |
ce8420bb HD |
524 | " .init : 0x%p - 0x%p (%4ld kB)\n" |
525 | " .data : 0x%p - 0x%p (%4ld kB)\n" | |
526 | " .text : 0x%p - 0x%p (%4ld kB)\n", | |
527 | ||
528 | (void*)VMALLOC_START, (void*)VMALLOC_END, | |
529 | (VMALLOC_END - VMALLOC_START) >> 20, | |
530 | ||
531 | __va(0), high_memory, | |
532 | ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20, | |
533 | ||
53faf291 KM |
534 | __init_begin, __init_end, |
535 | ((unsigned long)__init_end - (unsigned long)__init_begin) >> 10, | |
ce8420bb | 536 | |
53faf291 KM |
537 | _etext, _edata, |
538 | ((unsigned long)_edata - (unsigned long)_etext) >> 10, | |
ce8420bb | 539 | |
53faf291 KM |
540 | _text, _etext, |
541 | ((unsigned long)_etext - (unsigned long)_text) >> 10); | |
ce8420bb | 542 | #endif |
1da177e4 LT |
543 | } |
544 | ||
8039de10 | 545 | unsigned long *empty_zero_page __read_mostly; |
1da177e4 LT |
546 | |
547 | void show_mem(void) | |
548 | { | |
549 | int i,free = 0,total = 0,reserved = 0; | |
550 | int shared = 0, cached = 0; | |
551 | ||
552 | printk(KERN_INFO "Mem-info:\n"); | |
553 | show_free_areas(); | |
554 | printk(KERN_INFO "Free swap: %6ldkB\n", | |
555 | nr_swap_pages<<(PAGE_SHIFT-10)); | |
556 | #ifndef CONFIG_DISCONTIGMEM | |
557 | i = max_mapnr; | |
558 | while (i-- > 0) { | |
559 | total++; | |
560 | if (PageReserved(mem_map+i)) | |
561 | reserved++; | |
562 | else if (PageSwapCache(mem_map+i)) | |
563 | cached++; | |
564 | else if (!page_count(&mem_map[i])) | |
565 | free++; | |
566 | else | |
567 | shared += page_count(&mem_map[i]) - 1; | |
568 | } | |
569 | #else | |
570 | for (i = 0; i < npmem_ranges; i++) { | |
571 | int j; | |
572 | ||
573 | for (j = node_start_pfn(i); j < node_end_pfn(i); j++) { | |
574 | struct page *p; | |
208d54e5 | 575 | unsigned long flags; |
1da177e4 | 576 | |
208d54e5 | 577 | pgdat_resize_lock(NODE_DATA(i), &flags); |
408fde81 | 578 | p = nid_page_nr(i, j) - node_start_pfn(i); |
1da177e4 LT |
579 | |
580 | total++; | |
581 | if (PageReserved(p)) | |
582 | reserved++; | |
583 | else if (PageSwapCache(p)) | |
584 | cached++; | |
585 | else if (!page_count(p)) | |
586 | free++; | |
587 | else | |
588 | shared += page_count(p) - 1; | |
208d54e5 | 589 | pgdat_resize_unlock(NODE_DATA(i), &flags); |
1da177e4 LT |
590 | } |
591 | } | |
592 | #endif | |
593 | printk(KERN_INFO "%d pages of RAM\n", total); | |
594 | printk(KERN_INFO "%d reserved pages\n", reserved); | |
595 | printk(KERN_INFO "%d pages shared\n", shared); | |
596 | printk(KERN_INFO "%d pages swap cached\n", cached); | |
597 | ||
598 | ||
599 | #ifdef CONFIG_DISCONTIGMEM | |
600 | { | |
601 | struct zonelist *zl; | |
602 | int i, j, k; | |
603 | ||
604 | for (i = 0; i < npmem_ranges; i++) { | |
605 | for (j = 0; j < MAX_NR_ZONES; j++) { | |
606 | zl = NODE_DATA(i)->node_zonelists + j; | |
607 | ||
608 | printk("Zone list for zone %d on node %d: ", j, i); | |
609 | for (k = 0; zl->zones[k] != NULL; k++) | |
be10815f | 610 | printk("[%ld/%s] ", zone_to_nid(zl->zones[k]), zl->zones[k]->name); |
1da177e4 LT |
611 | printk("\n"); |
612 | } | |
613 | } | |
614 | } | |
615 | #endif | |
616 | } | |
617 | ||
618 | ||
619 | static void __init map_pages(unsigned long start_vaddr, unsigned long start_paddr, unsigned long size, pgprot_t pgprot) | |
620 | { | |
621 | pgd_t *pg_dir; | |
622 | pmd_t *pmd; | |
623 | pte_t *pg_table; | |
624 | unsigned long end_paddr; | |
625 | unsigned long start_pmd; | |
626 | unsigned long start_pte; | |
627 | unsigned long tmp1; | |
628 | unsigned long tmp2; | |
629 | unsigned long address; | |
630 | unsigned long ro_start; | |
631 | unsigned long ro_end; | |
632 | unsigned long fv_addr; | |
633 | unsigned long gw_addr; | |
634 | extern const unsigned long fault_vector_20; | |
635 | extern void * const linux_gateway_page; | |
636 | ||
c51d476a | 637 | ro_start = __pa((unsigned long)_text); |
1da177e4 LT |
638 | ro_end = __pa((unsigned long)&data_start); |
639 | fv_addr = __pa((unsigned long)&fault_vector_20) & PAGE_MASK; | |
640 | gw_addr = __pa((unsigned long)&linux_gateway_page) & PAGE_MASK; | |
641 | ||
642 | end_paddr = start_paddr + size; | |
643 | ||
644 | pg_dir = pgd_offset_k(start_vaddr); | |
645 | ||
646 | #if PTRS_PER_PMD == 1 | |
647 | start_pmd = 0; | |
648 | #else | |
649 | start_pmd = ((start_vaddr >> PMD_SHIFT) & (PTRS_PER_PMD - 1)); | |
650 | #endif | |
651 | start_pte = ((start_vaddr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)); | |
652 | ||
653 | address = start_paddr; | |
654 | while (address < end_paddr) { | |
655 | #if PTRS_PER_PMD == 1 | |
656 | pmd = (pmd_t *)__pa(pg_dir); | |
657 | #else | |
658 | pmd = (pmd_t *)pgd_address(*pg_dir); | |
659 | ||
660 | /* | |
661 | * pmd is physical at this point | |
662 | */ | |
663 | ||
664 | if (!pmd) { | |
665 | pmd = (pmd_t *) alloc_bootmem_low_pages_node(NODE_DATA(0),PAGE_SIZE << PMD_ORDER); | |
666 | pmd = (pmd_t *) __pa(pmd); | |
667 | } | |
668 | ||
669 | pgd_populate(NULL, pg_dir, __va(pmd)); | |
670 | #endif | |
671 | pg_dir++; | |
672 | ||
673 | /* now change pmd to kernel virtual addresses */ | |
674 | ||
675 | pmd = (pmd_t *)__va(pmd) + start_pmd; | |
676 | for (tmp1 = start_pmd; tmp1 < PTRS_PER_PMD; tmp1++,pmd++) { | |
677 | ||
678 | /* | |
679 | * pg_table is physical at this point | |
680 | */ | |
681 | ||
682 | pg_table = (pte_t *)pmd_address(*pmd); | |
683 | if (!pg_table) { | |
684 | pg_table = (pte_t *) | |
685 | alloc_bootmem_low_pages_node(NODE_DATA(0),PAGE_SIZE); | |
686 | pg_table = (pte_t *) __pa(pg_table); | |
687 | } | |
688 | ||
689 | pmd_populate_kernel(NULL, pmd, __va(pg_table)); | |
690 | ||
691 | /* now change pg_table to kernel virtual addresses */ | |
692 | ||
693 | pg_table = (pte_t *) __va(pg_table) + start_pte; | |
694 | for (tmp2 = start_pte; tmp2 < PTRS_PER_PTE; tmp2++,pg_table++) { | |
695 | pte_t pte; | |
696 | ||
697 | /* | |
698 | * Map the fault vector writable so we can | |
699 | * write the HPMC checksum. | |
700 | */ | |
2fd83038 | 701 | #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) |
1da177e4 LT |
702 | if (address >= ro_start && address < ro_end |
703 | && address != fv_addr | |
704 | && address != gw_addr) | |
705 | pte = __mk_pte(address, PAGE_KERNEL_RO); | |
706 | else | |
2fd83038 | 707 | #endif |
1da177e4 LT |
708 | pte = __mk_pte(address, pgprot); |
709 | ||
710 | if (address >= end_paddr) | |
711 | pte_val(pte) = 0; | |
712 | ||
713 | set_pte(pg_table, pte); | |
714 | ||
715 | address += PAGE_SIZE; | |
716 | } | |
717 | start_pte = 0; | |
718 | ||
719 | if (address >= end_paddr) | |
720 | break; | |
721 | } | |
722 | start_pmd = 0; | |
723 | } | |
724 | } | |
725 | ||
726 | /* | |
727 | * pagetable_init() sets up the page tables | |
728 | * | |
729 | * Note that gateway_init() places the Linux gateway page at page 0. | |
730 | * Since gateway pages cannot be dereferenced this has the desirable | |
731 | * side effect of trapping those pesky NULL-reference errors in the | |
732 | * kernel. | |
733 | */ | |
734 | static void __init pagetable_init(void) | |
735 | { | |
736 | int range; | |
737 | ||
738 | /* Map each physical memory range to its kernel vaddr */ | |
739 | ||
740 | for (range = 0; range < npmem_ranges; range++) { | |
741 | unsigned long start_paddr; | |
742 | unsigned long end_paddr; | |
743 | unsigned long size; | |
744 | ||
745 | start_paddr = pmem_ranges[range].start_pfn << PAGE_SHIFT; | |
746 | end_paddr = start_paddr + (pmem_ranges[range].pages << PAGE_SHIFT); | |
747 | size = pmem_ranges[range].pages << PAGE_SHIFT; | |
748 | ||
749 | map_pages((unsigned long)__va(start_paddr), start_paddr, | |
750 | size, PAGE_KERNEL); | |
751 | } | |
752 | ||
753 | #ifdef CONFIG_BLK_DEV_INITRD | |
754 | if (initrd_end && initrd_end > mem_limit) { | |
1bcdd854 | 755 | printk(KERN_INFO "initrd: mapping %08lx-%08lx\n", initrd_start, initrd_end); |
1da177e4 LT |
756 | map_pages(initrd_start, __pa(initrd_start), |
757 | initrd_end - initrd_start, PAGE_KERNEL); | |
758 | } | |
759 | #endif | |
760 | ||
761 | empty_zero_page = alloc_bootmem_pages(PAGE_SIZE); | |
762 | memset(empty_zero_page, 0, PAGE_SIZE); | |
763 | } | |
764 | ||
765 | static void __init gateway_init(void) | |
766 | { | |
767 | unsigned long linux_gateway_page_addr; | |
768 | /* FIXME: This is 'const' in order to trick the compiler | |
769 | into not treating it as DP-relative data. */ | |
770 | extern void * const linux_gateway_page; | |
771 | ||
772 | linux_gateway_page_addr = LINUX_GATEWAY_ADDR & PAGE_MASK; | |
773 | ||
774 | /* | |
775 | * Setup Linux Gateway page. | |
776 | * | |
777 | * The Linux gateway page will reside in kernel space (on virtual | |
778 | * page 0), so it doesn't need to be aliased into user space. | |
779 | */ | |
780 | ||
781 | map_pages(linux_gateway_page_addr, __pa(&linux_gateway_page), | |
782 | PAGE_SIZE, PAGE_GATEWAY); | |
783 | } | |
784 | ||
785 | #ifdef CONFIG_HPUX | |
786 | void | |
787 | map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm) | |
788 | { | |
789 | pgd_t *pg_dir; | |
790 | pmd_t *pmd; | |
791 | pte_t *pg_table; | |
792 | unsigned long start_pmd; | |
793 | unsigned long start_pte; | |
794 | unsigned long address; | |
795 | unsigned long hpux_gw_page_addr; | |
796 | /* FIXME: This is 'const' in order to trick the compiler | |
797 | into not treating it as DP-relative data. */ | |
798 | extern void * const hpux_gateway_page; | |
799 | ||
800 | hpux_gw_page_addr = HPUX_GATEWAY_ADDR & PAGE_MASK; | |
801 | ||
802 | /* | |
803 | * Setup HP-UX Gateway page. | |
804 | * | |
805 | * The HP-UX gateway page resides in the user address space, | |
806 | * so it needs to be aliased into each process. | |
807 | */ | |
808 | ||
809 | pg_dir = pgd_offset(mm,hpux_gw_page_addr); | |
810 | ||
811 | #if PTRS_PER_PMD == 1 | |
812 | start_pmd = 0; | |
813 | #else | |
814 | start_pmd = ((hpux_gw_page_addr >> PMD_SHIFT) & (PTRS_PER_PMD - 1)); | |
815 | #endif | |
816 | start_pte = ((hpux_gw_page_addr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)); | |
817 | ||
818 | address = __pa(&hpux_gateway_page); | |
819 | #if PTRS_PER_PMD == 1 | |
820 | pmd = (pmd_t *)__pa(pg_dir); | |
821 | #else | |
822 | pmd = (pmd_t *) pgd_address(*pg_dir); | |
823 | ||
824 | /* | |
825 | * pmd is physical at this point | |
826 | */ | |
827 | ||
828 | if (!pmd) { | |
829 | pmd = (pmd_t *) get_zeroed_page(GFP_KERNEL); | |
830 | pmd = (pmd_t *) __pa(pmd); | |
831 | } | |
832 | ||
833 | __pgd_val_set(*pg_dir, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pmd); | |
834 | #endif | |
835 | /* now change pmd to kernel virtual addresses */ | |
836 | ||
837 | pmd = (pmd_t *)__va(pmd) + start_pmd; | |
838 | ||
839 | /* | |
840 | * pg_table is physical at this point | |
841 | */ | |
842 | ||
843 | pg_table = (pte_t *) pmd_address(*pmd); | |
844 | if (!pg_table) | |
845 | pg_table = (pte_t *) __pa(get_zeroed_page(GFP_KERNEL)); | |
846 | ||
847 | __pmd_val_set(*pmd, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pg_table); | |
848 | ||
849 | /* now change pg_table to kernel virtual addresses */ | |
850 | ||
851 | pg_table = (pte_t *) __va(pg_table) + start_pte; | |
852 | set_pte(pg_table, __mk_pte(address, PAGE_GATEWAY)); | |
853 | } | |
854 | EXPORT_SYMBOL(map_hpux_gateway_page); | |
855 | #endif | |
856 | ||
1da177e4 LT |
857 | void __init paging_init(void) |
858 | { | |
859 | int i; | |
860 | ||
861 | setup_bootmem(); | |
862 | pagetable_init(); | |
863 | gateway_init(); | |
864 | flush_cache_all_local(); /* start with known state */ | |
ce33941f | 865 | flush_tlb_all_local(NULL); |
1da177e4 LT |
866 | |
867 | for (i = 0; i < npmem_ranges; i++) { | |
f06a9684 | 868 | unsigned long zones_size[MAX_NR_ZONES] = { 0, }; |
1da177e4 | 869 | |
00592837 | 870 | zones_size[ZONE_NORMAL] = pmem_ranges[i].pages; |
1da177e4 LT |
871 | |
872 | #ifdef CONFIG_DISCONTIGMEM | |
873 | /* Need to initialize the pfnnid_map before we can initialize | |
874 | the zone */ | |
875 | { | |
876 | int j; | |
877 | for (j = (pmem_ranges[i].start_pfn >> PFNNID_SHIFT); | |
878 | j <= ((pmem_ranges[i].start_pfn + pmem_ranges[i].pages) >> PFNNID_SHIFT); | |
879 | j++) { | |
880 | pfnnid_map[j] = i; | |
881 | } | |
882 | } | |
883 | #endif | |
884 | ||
885 | free_area_init_node(i, NODE_DATA(i), zones_size, | |
886 | pmem_ranges[i].start_pfn, NULL); | |
887 | } | |
888 | } | |
889 | ||
890 | #ifdef CONFIG_PA20 | |
891 | ||
892 | /* | |
893 | * Currently, all PA20 chips have 18 bit protection id's, which is the | |
894 | * limiting factor (space ids are 32 bits). | |
895 | */ | |
896 | ||
897 | #define NR_SPACE_IDS 262144 | |
898 | ||
899 | #else | |
900 | ||
901 | /* | |
902 | * Currently we have a one-to-one relationship between space id's and | |
903 | * protection id's. Older parisc chips (PCXS, PCXT, PCXL, PCXL2) only | |
904 | * support 15 bit protection id's, so that is the limiting factor. | |
905 | * PCXT' has 18 bit protection id's, but only 16 bit spaceids, so it's | |
906 | * probably not worth the effort for a special case here. | |
907 | */ | |
908 | ||
909 | #define NR_SPACE_IDS 32768 | |
910 | ||
911 | #endif /* !CONFIG_PA20 */ | |
912 | ||
913 | #define RECYCLE_THRESHOLD (NR_SPACE_IDS / 2) | |
914 | #define SID_ARRAY_SIZE (NR_SPACE_IDS / (8 * sizeof(long))) | |
915 | ||
916 | static unsigned long space_id[SID_ARRAY_SIZE] = { 1 }; /* disallow space 0 */ | |
917 | static unsigned long dirty_space_id[SID_ARRAY_SIZE]; | |
918 | static unsigned long space_id_index; | |
919 | static unsigned long free_space_ids = NR_SPACE_IDS - 1; | |
920 | static unsigned long dirty_space_ids = 0; | |
921 | ||
922 | static DEFINE_SPINLOCK(sid_lock); | |
923 | ||
924 | unsigned long alloc_sid(void) | |
925 | { | |
926 | unsigned long index; | |
927 | ||
928 | spin_lock(&sid_lock); | |
929 | ||
930 | if (free_space_ids == 0) { | |
931 | if (dirty_space_ids != 0) { | |
932 | spin_unlock(&sid_lock); | |
933 | flush_tlb_all(); /* flush_tlb_all() calls recycle_sids() */ | |
934 | spin_lock(&sid_lock); | |
935 | } | |
2fd83038 | 936 | BUG_ON(free_space_ids == 0); |
1da177e4 LT |
937 | } |
938 | ||
939 | free_space_ids--; | |
940 | ||
941 | index = find_next_zero_bit(space_id, NR_SPACE_IDS, space_id_index); | |
942 | space_id[index >> SHIFT_PER_LONG] |= (1L << (index & (BITS_PER_LONG - 1))); | |
943 | space_id_index = index; | |
944 | ||
945 | spin_unlock(&sid_lock); | |
946 | ||
947 | return index << SPACEID_SHIFT; | |
948 | } | |
949 | ||
950 | void free_sid(unsigned long spaceid) | |
951 | { | |
952 | unsigned long index = spaceid >> SPACEID_SHIFT; | |
953 | unsigned long *dirty_space_offset; | |
954 | ||
955 | dirty_space_offset = dirty_space_id + (index >> SHIFT_PER_LONG); | |
956 | index &= (BITS_PER_LONG - 1); | |
957 | ||
958 | spin_lock(&sid_lock); | |
959 | ||
2fd83038 | 960 | BUG_ON(*dirty_space_offset & (1L << index)); /* attempt to free space id twice */ |
1da177e4 LT |
961 | |
962 | *dirty_space_offset |= (1L << index); | |
963 | dirty_space_ids++; | |
964 | ||
965 | spin_unlock(&sid_lock); | |
966 | } | |
967 | ||
968 | ||
969 | #ifdef CONFIG_SMP | |
970 | static void get_dirty_sids(unsigned long *ndirtyptr,unsigned long *dirty_array) | |
971 | { | |
972 | int i; | |
973 | ||
974 | /* NOTE: sid_lock must be held upon entry */ | |
975 | ||
976 | *ndirtyptr = dirty_space_ids; | |
977 | if (dirty_space_ids != 0) { | |
978 | for (i = 0; i < SID_ARRAY_SIZE; i++) { | |
979 | dirty_array[i] = dirty_space_id[i]; | |
980 | dirty_space_id[i] = 0; | |
981 | } | |
982 | dirty_space_ids = 0; | |
983 | } | |
984 | ||
985 | return; | |
986 | } | |
987 | ||
988 | static void recycle_sids(unsigned long ndirty,unsigned long *dirty_array) | |
989 | { | |
990 | int i; | |
991 | ||
992 | /* NOTE: sid_lock must be held upon entry */ | |
993 | ||
994 | if (ndirty != 0) { | |
995 | for (i = 0; i < SID_ARRAY_SIZE; i++) { | |
996 | space_id[i] ^= dirty_array[i]; | |
997 | } | |
998 | ||
999 | free_space_ids += ndirty; | |
1000 | space_id_index = 0; | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | #else /* CONFIG_SMP */ | |
1005 | ||
1006 | static void recycle_sids(void) | |
1007 | { | |
1008 | int i; | |
1009 | ||
1010 | /* NOTE: sid_lock must be held upon entry */ | |
1011 | ||
1012 | if (dirty_space_ids != 0) { | |
1013 | for (i = 0; i < SID_ARRAY_SIZE; i++) { | |
1014 | space_id[i] ^= dirty_space_id[i]; | |
1015 | dirty_space_id[i] = 0; | |
1016 | } | |
1017 | ||
1018 | free_space_ids += dirty_space_ids; | |
1019 | dirty_space_ids = 0; | |
1020 | space_id_index = 0; | |
1021 | } | |
1022 | } | |
1023 | #endif | |
1024 | ||
1025 | /* | |
1026 | * flush_tlb_all() calls recycle_sids(), since whenever the entire tlb is | |
1027 | * purged, we can safely reuse the space ids that were released but | |
1028 | * not flushed from the tlb. | |
1029 | */ | |
1030 | ||
1031 | #ifdef CONFIG_SMP | |
1032 | ||
1033 | static unsigned long recycle_ndirty; | |
1034 | static unsigned long recycle_dirty_array[SID_ARRAY_SIZE]; | |
2fd83038 | 1035 | static unsigned int recycle_inuse; |
1da177e4 LT |
1036 | |
1037 | void flush_tlb_all(void) | |
1038 | { | |
1039 | int do_recycle; | |
1040 | ||
1041 | do_recycle = 0; | |
1042 | spin_lock(&sid_lock); | |
1043 | if (dirty_space_ids > RECYCLE_THRESHOLD) { | |
2fd83038 | 1044 | BUG_ON(recycle_inuse); /* FIXME: Use a semaphore/wait queue here */ |
1da177e4 LT |
1045 | get_dirty_sids(&recycle_ndirty,recycle_dirty_array); |
1046 | recycle_inuse++; | |
1047 | do_recycle++; | |
1048 | } | |
1049 | spin_unlock(&sid_lock); | |
ce33941f | 1050 | on_each_cpu(flush_tlb_all_local, NULL, 1, 1); |
1da177e4 LT |
1051 | if (do_recycle) { |
1052 | spin_lock(&sid_lock); | |
1053 | recycle_sids(recycle_ndirty,recycle_dirty_array); | |
1054 | recycle_inuse = 0; | |
1055 | spin_unlock(&sid_lock); | |
1056 | } | |
1057 | } | |
1058 | #else | |
1059 | void flush_tlb_all(void) | |
1060 | { | |
1061 | spin_lock(&sid_lock); | |
1b2425e3 | 1062 | flush_tlb_all_local(NULL); |
1da177e4 LT |
1063 | recycle_sids(); |
1064 | spin_unlock(&sid_lock); | |
1065 | } | |
1066 | #endif | |
1067 | ||
1068 | #ifdef CONFIG_BLK_DEV_INITRD | |
1069 | void free_initrd_mem(unsigned long start, unsigned long end) | |
1070 | { | |
94c3e87a HD |
1071 | if (start >= end) |
1072 | return; | |
1073 | printk(KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10); | |
1da177e4 LT |
1074 | for (; start < end; start += PAGE_SIZE) { |
1075 | ClearPageReserved(virt_to_page(start)); | |
7835e98b | 1076 | init_page_count(virt_to_page(start)); |
1da177e4 LT |
1077 | free_page(start); |
1078 | num_physpages++; | |
1079 | totalram_pages++; | |
1080 | } | |
1da177e4 LT |
1081 | } |
1082 | #endif |