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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 | 38 | struct node_map_data node_data[MAX_NUMNODES] __read_mostly; |
8039de10 | 39 | unsigned char pfnnid_map[PFNNID_MAP_MAX] __read_mostly; |
1da177e4 LT |
40 | #endif |
41 | ||
42 | static struct resource data_resource = { | |
43 | .name = "Kernel data", | |
44 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
45 | }; | |
46 | ||
47 | static struct resource code_resource = { | |
48 | .name = "Kernel code", | |
49 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
50 | }; | |
51 | ||
52 | static struct resource pdcdata_resource = { | |
53 | .name = "PDC data (Page Zero)", | |
54 | .start = 0, | |
55 | .end = 0x9ff, | |
56 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, | |
57 | }; | |
58 | ||
8039de10 | 59 | static struct resource sysram_resources[MAX_PHYSMEM_RANGES] __read_mostly; |
1da177e4 LT |
60 | |
61 | /* The following array is initialized from the firmware specific | |
62 | * information retrieved in kernel/inventory.c. | |
63 | */ | |
64 | ||
8039de10 HD |
65 | physmem_range_t pmem_ranges[MAX_PHYSMEM_RANGES] __read_mostly; |
66 | int npmem_ranges __read_mostly; | |
1da177e4 | 67 | |
a8f44e38 | 68 | #ifdef CONFIG_64BIT |
1da177e4 | 69 | #define MAX_MEM (~0UL) |
a8f44e38 | 70 | #else /* !CONFIG_64BIT */ |
1da177e4 | 71 | #define MAX_MEM (3584U*1024U*1024U) |
a8f44e38 | 72 | #endif /* !CONFIG_64BIT */ |
1da177e4 | 73 | |
8039de10 | 74 | static unsigned long mem_limit __read_mostly = MAX_MEM; |
1da177e4 LT |
75 | |
76 | static void __init mem_limit_func(void) | |
77 | { | |
78 | char *cp, *end; | |
79 | unsigned long limit; | |
1da177e4 LT |
80 | |
81 | /* We need this before __setup() functions are called */ | |
82 | ||
83 | limit = MAX_MEM; | |
668f9931 | 84 | for (cp = boot_command_line; *cp; ) { |
1da177e4 LT |
85 | if (memcmp(cp, "mem=", 4) == 0) { |
86 | cp += 4; | |
87 | limit = memparse(cp, &end); | |
88 | if (end != cp) | |
89 | break; | |
90 | cp = end; | |
91 | } else { | |
92 | while (*cp != ' ' && *cp) | |
93 | ++cp; | |
94 | while (*cp == ' ') | |
95 | ++cp; | |
96 | } | |
97 | } | |
98 | ||
99 | if (limit < mem_limit) | |
100 | mem_limit = limit; | |
101 | } | |
102 | ||
103 | #define MAX_GAP (0x40000000UL >> PAGE_SHIFT) | |
104 | ||
105 | static void __init setup_bootmem(void) | |
106 | { | |
107 | unsigned long bootmap_size; | |
108 | unsigned long mem_max; | |
109 | unsigned long bootmap_pages; | |
110 | unsigned long bootmap_start_pfn; | |
111 | unsigned long bootmap_pfn; | |
112 | #ifndef CONFIG_DISCONTIGMEM | |
113 | physmem_range_t pmem_holes[MAX_PHYSMEM_RANGES - 1]; | |
114 | int npmem_holes; | |
115 | #endif | |
116 | int i, sysram_resource_count; | |
117 | ||
118 | disable_sr_hashing(); /* Turn off space register hashing */ | |
119 | ||
120 | /* | |
121 | * Sort the ranges. Since the number of ranges is typically | |
122 | * small, and performance is not an issue here, just do | |
123 | * a simple insertion sort. | |
124 | */ | |
125 | ||
126 | for (i = 1; i < npmem_ranges; i++) { | |
127 | int j; | |
128 | ||
129 | for (j = i; j > 0; j--) { | |
130 | unsigned long tmp; | |
131 | ||
132 | if (pmem_ranges[j-1].start_pfn < | |
133 | pmem_ranges[j].start_pfn) { | |
134 | ||
135 | break; | |
136 | } | |
137 | tmp = pmem_ranges[j-1].start_pfn; | |
138 | pmem_ranges[j-1].start_pfn = pmem_ranges[j].start_pfn; | |
139 | pmem_ranges[j].start_pfn = tmp; | |
140 | tmp = pmem_ranges[j-1].pages; | |
141 | pmem_ranges[j-1].pages = pmem_ranges[j].pages; | |
142 | pmem_ranges[j].pages = tmp; | |
143 | } | |
144 | } | |
145 | ||
146 | #ifndef CONFIG_DISCONTIGMEM | |
147 | /* | |
148 | * Throw out ranges that are too far apart (controlled by | |
149 | * MAX_GAP). | |
150 | */ | |
151 | ||
152 | for (i = 1; i < npmem_ranges; i++) { | |
153 | if (pmem_ranges[i].start_pfn - | |
154 | (pmem_ranges[i-1].start_pfn + | |
155 | pmem_ranges[i-1].pages) > MAX_GAP) { | |
156 | npmem_ranges = i; | |
157 | printk("Large gap in memory detected (%ld pages). " | |
158 | "Consider turning on CONFIG_DISCONTIGMEM\n", | |
159 | pmem_ranges[i].start_pfn - | |
160 | (pmem_ranges[i-1].start_pfn + | |
161 | pmem_ranges[i-1].pages)); | |
162 | break; | |
163 | } | |
164 | } | |
165 | #endif | |
166 | ||
167 | if (npmem_ranges > 1) { | |
168 | ||
169 | /* Print the memory ranges */ | |
170 | ||
171 | printk(KERN_INFO "Memory Ranges:\n"); | |
172 | ||
173 | for (i = 0; i < npmem_ranges; i++) { | |
174 | unsigned long start; | |
175 | unsigned long size; | |
176 | ||
177 | size = (pmem_ranges[i].pages << PAGE_SHIFT); | |
178 | start = (pmem_ranges[i].start_pfn << PAGE_SHIFT); | |
179 | printk(KERN_INFO "%2d) Start 0x%016lx End 0x%016lx Size %6ld MB\n", | |
180 | i,start, start + (size - 1), size >> 20); | |
181 | } | |
182 | } | |
183 | ||
184 | sysram_resource_count = npmem_ranges; | |
185 | for (i = 0; i < sysram_resource_count; i++) { | |
186 | struct resource *res = &sysram_resources[i]; | |
187 | res->name = "System RAM"; | |
188 | res->start = pmem_ranges[i].start_pfn << PAGE_SHIFT; | |
189 | res->end = res->start + (pmem_ranges[i].pages << PAGE_SHIFT)-1; | |
190 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
191 | request_resource(&iomem_resource, res); | |
192 | } | |
193 | ||
194 | /* | |
195 | * For 32 bit kernels we limit the amount of memory we can | |
196 | * support, in order to preserve enough kernel address space | |
197 | * for other purposes. For 64 bit kernels we don't normally | |
198 | * limit the memory, but this mechanism can be used to | |
199 | * artificially limit the amount of memory (and it is written | |
200 | * to work with multiple memory ranges). | |
201 | */ | |
202 | ||
203 | mem_limit_func(); /* check for "mem=" argument */ | |
204 | ||
205 | mem_max = 0; | |
206 | num_physpages = 0; | |
207 | for (i = 0; i < npmem_ranges; i++) { | |
208 | unsigned long rsize; | |
209 | ||
210 | rsize = pmem_ranges[i].pages << PAGE_SHIFT; | |
211 | if ((mem_max + rsize) > mem_limit) { | |
212 | printk(KERN_WARNING "Memory truncated to %ld MB\n", mem_limit >> 20); | |
213 | if (mem_max == mem_limit) | |
214 | npmem_ranges = i; | |
215 | else { | |
216 | pmem_ranges[i].pages = (mem_limit >> PAGE_SHIFT) | |
217 | - (mem_max >> PAGE_SHIFT); | |
218 | npmem_ranges = i + 1; | |
219 | mem_max = mem_limit; | |
220 | } | |
221 | num_physpages += pmem_ranges[i].pages; | |
222 | break; | |
223 | } | |
224 | num_physpages += pmem_ranges[i].pages; | |
225 | mem_max += rsize; | |
226 | } | |
227 | ||
228 | printk(KERN_INFO "Total Memory: %ld MB\n",mem_max >> 20); | |
229 | ||
230 | #ifndef CONFIG_DISCONTIGMEM | |
231 | /* Merge the ranges, keeping track of the holes */ | |
232 | ||
233 | { | |
234 | unsigned long end_pfn; | |
235 | unsigned long hole_pages; | |
236 | ||
237 | npmem_holes = 0; | |
238 | end_pfn = pmem_ranges[0].start_pfn + pmem_ranges[0].pages; | |
239 | for (i = 1; i < npmem_ranges; i++) { | |
240 | ||
241 | hole_pages = pmem_ranges[i].start_pfn - end_pfn; | |
242 | if (hole_pages) { | |
243 | pmem_holes[npmem_holes].start_pfn = end_pfn; | |
244 | pmem_holes[npmem_holes++].pages = hole_pages; | |
245 | end_pfn += hole_pages; | |
246 | } | |
247 | end_pfn += pmem_ranges[i].pages; | |
248 | } | |
249 | ||
250 | pmem_ranges[0].pages = end_pfn - pmem_ranges[0].start_pfn; | |
251 | npmem_ranges = 1; | |
252 | } | |
253 | #endif | |
254 | ||
255 | bootmap_pages = 0; | |
256 | for (i = 0; i < npmem_ranges; i++) | |
257 | bootmap_pages += bootmem_bootmap_pages(pmem_ranges[i].pages); | |
258 | ||
259 | bootmap_start_pfn = PAGE_ALIGN(__pa((unsigned long) &_end)) >> PAGE_SHIFT; | |
260 | ||
261 | #ifdef CONFIG_DISCONTIGMEM | |
262 | for (i = 0; i < MAX_PHYSMEM_RANGES; i++) { | |
263 | memset(NODE_DATA(i), 0, sizeof(pg_data_t)); | |
b61bfa3c | 264 | NODE_DATA(i)->bdata = &bootmem_node_data[i]; |
1da177e4 LT |
265 | } |
266 | memset(pfnnid_map, 0xff, sizeof(pfnnid_map)); | |
267 | ||
268 | for (i = 0; i < npmem_ranges; i++) | |
269 | node_set_online(i); | |
270 | #endif | |
271 | ||
272 | /* | |
273 | * Initialize and free the full range of memory in each range. | |
274 | * Note that the only writing these routines do are to the bootmap, | |
275 | * and we've made sure to locate the bootmap properly so that they | |
276 | * won't be writing over anything important. | |
277 | */ | |
278 | ||
279 | bootmap_pfn = bootmap_start_pfn; | |
280 | max_pfn = 0; | |
281 | for (i = 0; i < npmem_ranges; i++) { | |
282 | unsigned long start_pfn; | |
283 | unsigned long npages; | |
284 | ||
285 | start_pfn = pmem_ranges[i].start_pfn; | |
286 | npages = pmem_ranges[i].pages; | |
287 | ||
288 | bootmap_size = init_bootmem_node(NODE_DATA(i), | |
289 | bootmap_pfn, | |
290 | start_pfn, | |
291 | (start_pfn + npages) ); | |
292 | free_bootmem_node(NODE_DATA(i), | |
293 | (start_pfn << PAGE_SHIFT), | |
294 | (npages << PAGE_SHIFT) ); | |
295 | bootmap_pfn += (bootmap_size + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
296 | if ((start_pfn + npages) > max_pfn) | |
297 | max_pfn = start_pfn + npages; | |
298 | } | |
299 | ||
5cdb8205 GG |
300 | /* IOMMU is always used to access "high mem" on those boxes |
301 | * that can support enough mem that a PCI device couldn't | |
302 | * directly DMA to any physical addresses. | |
303 | * ISA DMA support will need to revisit this. | |
304 | */ | |
305 | max_low_pfn = max_pfn; | |
306 | ||
8980a7ba HD |
307 | /* bootmap sizing messed up? */ |
308 | BUG_ON((bootmap_pfn - bootmap_start_pfn) != bootmap_pages); | |
1da177e4 LT |
309 | |
310 | /* reserve PAGE0 pdc memory, kernel text/data/bss & bootmap */ | |
311 | ||
312 | #define PDC_CONSOLE_IO_IODC_SIZE 32768 | |
313 | ||
314 | reserve_bootmem_node(NODE_DATA(0), 0UL, | |
72a7fe39 BW |
315 | (unsigned long)(PAGE0->mem_free + |
316 | PDC_CONSOLE_IO_IODC_SIZE), BOOTMEM_DEFAULT); | |
c51d476a | 317 | reserve_bootmem_node(NODE_DATA(0), __pa((unsigned long)_text), |
72a7fe39 | 318 | (unsigned long)(_end - _text), BOOTMEM_DEFAULT); |
1da177e4 | 319 | reserve_bootmem_node(NODE_DATA(0), (bootmap_start_pfn << PAGE_SHIFT), |
72a7fe39 BW |
320 | ((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT), |
321 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
322 | |
323 | #ifndef CONFIG_DISCONTIGMEM | |
324 | ||
325 | /* reserve the holes */ | |
326 | ||
327 | for (i = 0; i < npmem_holes; i++) { | |
328 | reserve_bootmem_node(NODE_DATA(0), | |
329 | (pmem_holes[i].start_pfn << PAGE_SHIFT), | |
72a7fe39 BW |
330 | (pmem_holes[i].pages << PAGE_SHIFT), |
331 | BOOTMEM_DEFAULT); | |
1da177e4 LT |
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 | ||
72a7fe39 BW |
349 | reserve_bootmem_node(NODE_DATA(0), __pa(initrd_start), |
350 | initrd_reserve, BOOTMEM_DEFAULT); | |
1da177e4 LT |
351 | } |
352 | } | |
353 | #endif | |
354 | ||
355 | data_resource.start = virt_to_phys(&data_start); | |
c51d476a KM |
356 | data_resource.end = virt_to_phys(_end) - 1; |
357 | code_resource.start = virt_to_phys(_text); | |
1da177e4 LT |
358 | code_resource.end = virt_to_phys(&data_start)-1; |
359 | ||
360 | /* We don't know which region the kernel will be in, so try | |
361 | * all of them. | |
362 | */ | |
363 | for (i = 0; i < sysram_resource_count; i++) { | |
364 | struct resource *res = &sysram_resources[i]; | |
365 | request_resource(res, &code_resource); | |
366 | request_resource(res, &data_resource); | |
367 | } | |
368 | request_resource(&sysram_resources[0], &pdcdata_resource); | |
369 | } | |
370 | ||
371 | void free_initmem(void) | |
372 | { | |
2fd83038 HD |
373 | unsigned long addr, init_begin, init_end; |
374 | ||
1da177e4 LT |
375 | printk(KERN_INFO "Freeing unused kernel memory: "); |
376 | ||
81a3de3e | 377 | #ifdef CONFIG_DEBUG_KERNEL |
1da177e4 LT |
378 | /* Attempt to catch anyone trying to execute code here |
379 | * by filling the page with BRK insns. | |
380 | * | |
381 | * If we disable interrupts for all CPUs, then IPI stops working. | |
382 | * Kinda breaks the global cache flushing. | |
383 | */ | |
384 | local_irq_disable(); | |
385 | ||
c51d476a KM |
386 | memset(__init_begin, 0x00, |
387 | (unsigned long)__init_end - (unsigned long)__init_begin); | |
1da177e4 LT |
388 | |
389 | flush_data_cache(); | |
390 | asm volatile("sync" : : ); | |
c51d476a | 391 | flush_icache_range((unsigned long)__init_begin, (unsigned long)__init_end); |
1da177e4 LT |
392 | asm volatile("sync" : : ); |
393 | ||
394 | local_irq_enable(); | |
395 | #endif | |
396 | ||
2fd83038 HD |
397 | /* align __init_begin and __init_end to page size, |
398 | ignoring linker script where we might have tried to save RAM */ | |
c51d476a KM |
399 | init_begin = PAGE_ALIGN((unsigned long)(__init_begin)); |
400 | init_end = PAGE_ALIGN((unsigned long)(__init_end)); | |
2fd83038 | 401 | for (addr = init_begin; addr < init_end; addr += PAGE_SIZE) { |
1da177e4 | 402 | ClearPageReserved(virt_to_page(addr)); |
7835e98b | 403 | init_page_count(virt_to_page(addr)); |
1da177e4 LT |
404 | free_page(addr); |
405 | num_physpages++; | |
406 | totalram_pages++; | |
407 | } | |
408 | ||
409 | /* set up a new led state on systems shipped LED State panel */ | |
410 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE); | |
411 | ||
2fd83038 | 412 | printk("%luk freed\n", (init_end - init_begin) >> 10); |
1da177e4 LT |
413 | } |
414 | ||
1bcdd854 HD |
415 | |
416 | #ifdef CONFIG_DEBUG_RODATA | |
417 | void mark_rodata_ro(void) | |
418 | { | |
1bcdd854 HD |
419 | /* rodata memory was already mapped with KERNEL_RO access rights by |
420 | pagetable_init() and map_pages(). No need to do additional stuff here */ | |
421 | printk (KERN_INFO "Write protecting the kernel read-only data: %luk\n", | |
a581c2a4 | 422 | (unsigned long)(__end_rodata - __start_rodata) >> 10); |
1bcdd854 HD |
423 | } |
424 | #endif | |
425 | ||
426 | ||
1da177e4 LT |
427 | /* |
428 | * Just an arbitrary offset to serve as a "hole" between mapping areas | |
429 | * (between top of physical memory and a potential pcxl dma mapping | |
430 | * area, and below the vmalloc mapping area). | |
431 | * | |
432 | * The current 32K value just means that there will be a 32K "hole" | |
433 | * between mapping areas. That means that any out-of-bounds memory | |
434 | * accesses will hopefully be caught. The vmalloc() routines leaves | |
435 | * a hole of 4kB between each vmalloced area for the same reason. | |
436 | */ | |
437 | ||
438 | /* Leave room for gateway page expansion */ | |
439 | #if KERNEL_MAP_START < GATEWAY_PAGE_SIZE | |
440 | #error KERNEL_MAP_START is in gateway reserved region | |
441 | #endif | |
442 | #define MAP_START (KERNEL_MAP_START) | |
443 | ||
444 | #define VM_MAP_OFFSET (32*1024) | |
445 | #define SET_MAP_OFFSET(x) ((void *)(((unsigned long)(x) + VM_MAP_OFFSET) \ | |
446 | & ~(VM_MAP_OFFSET-1))) | |
447 | ||
8039de10 | 448 | void *vmalloc_start __read_mostly; |
1da177e4 LT |
449 | EXPORT_SYMBOL(vmalloc_start); |
450 | ||
451 | #ifdef CONFIG_PA11 | |
8039de10 | 452 | unsigned long pcxl_dma_start __read_mostly; |
1da177e4 LT |
453 | #endif |
454 | ||
455 | void __init mem_init(void) | |
456 | { | |
ce8420bb | 457 | int codesize, reservedpages, datasize, initsize; |
ce8420bb | 458 | |
48d27cb2 HD |
459 | /* Do sanity checks on page table constants */ |
460 | BUILD_BUG_ON(PTE_ENTRY_SIZE != sizeof(pte_t)); | |
461 | BUILD_BUG_ON(PMD_ENTRY_SIZE != sizeof(pmd_t)); | |
462 | BUILD_BUG_ON(PGD_ENTRY_SIZE != sizeof(pgd_t)); | |
463 | BUILD_BUG_ON(PAGE_SHIFT + BITS_PER_PTE + BITS_PER_PMD + BITS_PER_PGD | |
464 | > BITS_PER_LONG); | |
465 | ||
1da177e4 LT |
466 | high_memory = __va((max_pfn << PAGE_SHIFT)); |
467 | ||
468 | #ifndef CONFIG_DISCONTIGMEM | |
469 | max_mapnr = page_to_pfn(virt_to_page(high_memory - 1)) + 1; | |
470 | totalram_pages += free_all_bootmem(); | |
471 | #else | |
472 | { | |
473 | int i; | |
474 | ||
475 | for (i = 0; i < npmem_ranges; i++) | |
476 | totalram_pages += free_all_bootmem_node(NODE_DATA(i)); | |
477 | } | |
478 | #endif | |
479 | ||
53faf291 KM |
480 | codesize = (unsigned long)_etext - (unsigned long)_text; |
481 | datasize = (unsigned long)_edata - (unsigned long)_etext; | |
482 | initsize = (unsigned long)__init_end - (unsigned long)__init_begin; | |
ce8420bb HD |
483 | |
484 | reservedpages = 0; | |
53faf291 KM |
485 | { |
486 | unsigned long pfn; | |
487 | #ifdef CONFIG_DISCONTIGMEM | |
488 | int i; | |
489 | ||
490 | for (i = 0; i < npmem_ranges; i++) { | |
491 | for (pfn = node_start_pfn(i); pfn < node_end_pfn(i); pfn++) { | |
492 | if (PageReserved(pfn_to_page(pfn))) | |
493 | reservedpages++; | |
494 | } | |
495 | } | |
496 | #else /* !CONFIG_DISCONTIGMEM */ | |
497 | for (pfn = 0; pfn < max_pfn; pfn++) { | |
ce8420bb HD |
498 | /* |
499 | * Only count reserved RAM pages | |
500 | */ | |
53faf291 | 501 | if (PageReserved(pfn_to_page(pfn))) |
ce8420bb | 502 | reservedpages++; |
53faf291 KM |
503 | } |
504 | #endif | |
505 | } | |
1da177e4 LT |
506 | |
507 | #ifdef CONFIG_PA11 | |
508 | if (hppa_dma_ops == &pcxl_dma_ops) { | |
509 | pcxl_dma_start = (unsigned long)SET_MAP_OFFSET(MAP_START); | |
510 | vmalloc_start = SET_MAP_OFFSET(pcxl_dma_start + PCXL_DMA_MAP_SIZE); | |
511 | } else { | |
512 | pcxl_dma_start = 0; | |
513 | vmalloc_start = SET_MAP_OFFSET(MAP_START); | |
514 | } | |
515 | #else | |
516 | vmalloc_start = SET_MAP_OFFSET(MAP_START); | |
517 | #endif | |
518 | ||
53faf291 KM |
519 | printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init)\n", |
520 | (unsigned long)nr_free_pages() << (PAGE_SHIFT-10), | |
ce8420bb HD |
521 | num_physpages << (PAGE_SHIFT-10), |
522 | codesize >> 10, | |
523 | reservedpages << (PAGE_SHIFT-10), | |
524 | datasize >> 10, | |
53faf291 KM |
525 | initsize >> 10 |
526 | ); | |
ce8420bb HD |
527 | |
528 | #ifdef CONFIG_DEBUG_KERNEL /* double-sanity-check paranoia */ | |
529 | printk("virtual kernel memory layout:\n" | |
530 | " vmalloc : 0x%p - 0x%p (%4ld MB)\n" | |
53faf291 | 531 | " memory : 0x%p - 0x%p (%4ld MB)\n" |
ce8420bb HD |
532 | " .init : 0x%p - 0x%p (%4ld kB)\n" |
533 | " .data : 0x%p - 0x%p (%4ld kB)\n" | |
534 | " .text : 0x%p - 0x%p (%4ld kB)\n", | |
535 | ||
536 | (void*)VMALLOC_START, (void*)VMALLOC_END, | |
537 | (VMALLOC_END - VMALLOC_START) >> 20, | |
538 | ||
539 | __va(0), high_memory, | |
540 | ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20, | |
541 | ||
53faf291 KM |
542 | __init_begin, __init_end, |
543 | ((unsigned long)__init_end - (unsigned long)__init_begin) >> 10, | |
ce8420bb | 544 | |
53faf291 KM |
545 | _etext, _edata, |
546 | ((unsigned long)_edata - (unsigned long)_etext) >> 10, | |
ce8420bb | 547 | |
53faf291 KM |
548 | _text, _etext, |
549 | ((unsigned long)_etext - (unsigned long)_text) >> 10); | |
ce8420bb | 550 | #endif |
1da177e4 LT |
551 | } |
552 | ||
8039de10 | 553 | unsigned long *empty_zero_page __read_mostly; |
22febf1f | 554 | EXPORT_SYMBOL(empty_zero_page); |
1da177e4 LT |
555 | |
556 | void show_mem(void) | |
557 | { | |
558 | int i,free = 0,total = 0,reserved = 0; | |
559 | int shared = 0, cached = 0; | |
560 | ||
561 | printk(KERN_INFO "Mem-info:\n"); | |
562 | show_free_areas(); | |
1da177e4 LT |
563 | #ifndef CONFIG_DISCONTIGMEM |
564 | i = max_mapnr; | |
565 | while (i-- > 0) { | |
566 | total++; | |
567 | if (PageReserved(mem_map+i)) | |
568 | reserved++; | |
569 | else if (PageSwapCache(mem_map+i)) | |
570 | cached++; | |
571 | else if (!page_count(&mem_map[i])) | |
572 | free++; | |
573 | else | |
574 | shared += page_count(&mem_map[i]) - 1; | |
575 | } | |
576 | #else | |
577 | for (i = 0; i < npmem_ranges; i++) { | |
578 | int j; | |
579 | ||
580 | for (j = node_start_pfn(i); j < node_end_pfn(i); j++) { | |
581 | struct page *p; | |
208d54e5 | 582 | unsigned long flags; |
1da177e4 | 583 | |
208d54e5 | 584 | pgdat_resize_lock(NODE_DATA(i), &flags); |
408fde81 | 585 | p = nid_page_nr(i, j) - node_start_pfn(i); |
1da177e4 LT |
586 | |
587 | total++; | |
588 | if (PageReserved(p)) | |
589 | reserved++; | |
590 | else if (PageSwapCache(p)) | |
591 | cached++; | |
592 | else if (!page_count(p)) | |
593 | free++; | |
594 | else | |
595 | shared += page_count(p) - 1; | |
208d54e5 | 596 | pgdat_resize_unlock(NODE_DATA(i), &flags); |
1da177e4 LT |
597 | } |
598 | } | |
599 | #endif | |
600 | printk(KERN_INFO "%d pages of RAM\n", total); | |
601 | printk(KERN_INFO "%d reserved pages\n", reserved); | |
602 | printk(KERN_INFO "%d pages shared\n", shared); | |
603 | printk(KERN_INFO "%d pages swap cached\n", cached); | |
604 | ||
605 | ||
606 | #ifdef CONFIG_DISCONTIGMEM | |
607 | { | |
608 | struct zonelist *zl; | |
54a6eb5c | 609 | int i, j; |
1da177e4 LT |
610 | |
611 | for (i = 0; i < npmem_ranges; i++) { | |
4413a0f6 | 612 | zl = node_zonelist(i, 0); |
1da177e4 | 613 | for (j = 0; j < MAX_NR_ZONES; j++) { |
dd1a239f | 614 | struct zoneref *z; |
54a6eb5c | 615 | struct zone *zone; |
1da177e4 LT |
616 | |
617 | printk("Zone list for zone %d on node %d: ", j, i); | |
54a6eb5c MG |
618 | for_each_zone_zonelist(zone, z, zl, j) |
619 | printk("[%d/%s] ", zone_to_nid(zone), | |
620 | zone->name); | |
1da177e4 LT |
621 | printk("\n"); |
622 | } | |
623 | } | |
624 | } | |
625 | #endif | |
626 | } | |
627 | ||
628 | ||
629 | static void __init map_pages(unsigned long start_vaddr, unsigned long start_paddr, unsigned long size, pgprot_t pgprot) | |
630 | { | |
631 | pgd_t *pg_dir; | |
632 | pmd_t *pmd; | |
633 | pte_t *pg_table; | |
634 | unsigned long end_paddr; | |
635 | unsigned long start_pmd; | |
636 | unsigned long start_pte; | |
637 | unsigned long tmp1; | |
638 | unsigned long tmp2; | |
639 | unsigned long address; | |
640 | unsigned long ro_start; | |
641 | unsigned long ro_end; | |
642 | unsigned long fv_addr; | |
643 | unsigned long gw_addr; | |
644 | extern const unsigned long fault_vector_20; | |
645 | extern void * const linux_gateway_page; | |
646 | ||
c51d476a | 647 | ro_start = __pa((unsigned long)_text); |
1da177e4 LT |
648 | ro_end = __pa((unsigned long)&data_start); |
649 | fv_addr = __pa((unsigned long)&fault_vector_20) & PAGE_MASK; | |
650 | gw_addr = __pa((unsigned long)&linux_gateway_page) & PAGE_MASK; | |
651 | ||
652 | end_paddr = start_paddr + size; | |
653 | ||
654 | pg_dir = pgd_offset_k(start_vaddr); | |
655 | ||
656 | #if PTRS_PER_PMD == 1 | |
657 | start_pmd = 0; | |
658 | #else | |
659 | start_pmd = ((start_vaddr >> PMD_SHIFT) & (PTRS_PER_PMD - 1)); | |
660 | #endif | |
661 | start_pte = ((start_vaddr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)); | |
662 | ||
663 | address = start_paddr; | |
664 | while (address < end_paddr) { | |
665 | #if PTRS_PER_PMD == 1 | |
666 | pmd = (pmd_t *)__pa(pg_dir); | |
667 | #else | |
668 | pmd = (pmd_t *)pgd_address(*pg_dir); | |
669 | ||
670 | /* | |
671 | * pmd is physical at this point | |
672 | */ | |
673 | ||
674 | if (!pmd) { | |
675 | pmd = (pmd_t *) alloc_bootmem_low_pages_node(NODE_DATA(0),PAGE_SIZE << PMD_ORDER); | |
676 | pmd = (pmd_t *) __pa(pmd); | |
677 | } | |
678 | ||
679 | pgd_populate(NULL, pg_dir, __va(pmd)); | |
680 | #endif | |
681 | pg_dir++; | |
682 | ||
683 | /* now change pmd to kernel virtual addresses */ | |
684 | ||
685 | pmd = (pmd_t *)__va(pmd) + start_pmd; | |
686 | for (tmp1 = start_pmd; tmp1 < PTRS_PER_PMD; tmp1++,pmd++) { | |
687 | ||
688 | /* | |
689 | * pg_table is physical at this point | |
690 | */ | |
691 | ||
692 | pg_table = (pte_t *)pmd_address(*pmd); | |
693 | if (!pg_table) { | |
694 | pg_table = (pte_t *) | |
695 | alloc_bootmem_low_pages_node(NODE_DATA(0),PAGE_SIZE); | |
696 | pg_table = (pte_t *) __pa(pg_table); | |
697 | } | |
698 | ||
699 | pmd_populate_kernel(NULL, pmd, __va(pg_table)); | |
700 | ||
701 | /* now change pg_table to kernel virtual addresses */ | |
702 | ||
703 | pg_table = (pte_t *) __va(pg_table) + start_pte; | |
704 | for (tmp2 = start_pte; tmp2 < PTRS_PER_PTE; tmp2++,pg_table++) { | |
705 | pte_t pte; | |
706 | ||
707 | /* | |
708 | * Map the fault vector writable so we can | |
709 | * write the HPMC checksum. | |
710 | */ | |
2fd83038 | 711 | #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) |
1da177e4 LT |
712 | if (address >= ro_start && address < ro_end |
713 | && address != fv_addr | |
714 | && address != gw_addr) | |
715 | pte = __mk_pte(address, PAGE_KERNEL_RO); | |
716 | else | |
2fd83038 | 717 | #endif |
1da177e4 LT |
718 | pte = __mk_pte(address, pgprot); |
719 | ||
720 | if (address >= end_paddr) | |
721 | pte_val(pte) = 0; | |
722 | ||
723 | set_pte(pg_table, pte); | |
724 | ||
725 | address += PAGE_SIZE; | |
726 | } | |
727 | start_pte = 0; | |
728 | ||
729 | if (address >= end_paddr) | |
730 | break; | |
731 | } | |
732 | start_pmd = 0; | |
733 | } | |
734 | } | |
735 | ||
736 | /* | |
737 | * pagetable_init() sets up the page tables | |
738 | * | |
739 | * Note that gateway_init() places the Linux gateway page at page 0. | |
740 | * Since gateway pages cannot be dereferenced this has the desirable | |
741 | * side effect of trapping those pesky NULL-reference errors in the | |
742 | * kernel. | |
743 | */ | |
744 | static void __init pagetable_init(void) | |
745 | { | |
746 | int range; | |
747 | ||
748 | /* Map each physical memory range to its kernel vaddr */ | |
749 | ||
750 | for (range = 0; range < npmem_ranges; range++) { | |
751 | unsigned long start_paddr; | |
752 | unsigned long end_paddr; | |
753 | unsigned long size; | |
754 | ||
755 | start_paddr = pmem_ranges[range].start_pfn << PAGE_SHIFT; | |
756 | end_paddr = start_paddr + (pmem_ranges[range].pages << PAGE_SHIFT); | |
757 | size = pmem_ranges[range].pages << PAGE_SHIFT; | |
758 | ||
759 | map_pages((unsigned long)__va(start_paddr), start_paddr, | |
760 | size, PAGE_KERNEL); | |
761 | } | |
762 | ||
763 | #ifdef CONFIG_BLK_DEV_INITRD | |
764 | if (initrd_end && initrd_end > mem_limit) { | |
1bcdd854 | 765 | printk(KERN_INFO "initrd: mapping %08lx-%08lx\n", initrd_start, initrd_end); |
1da177e4 LT |
766 | map_pages(initrd_start, __pa(initrd_start), |
767 | initrd_end - initrd_start, PAGE_KERNEL); | |
768 | } | |
769 | #endif | |
770 | ||
771 | empty_zero_page = alloc_bootmem_pages(PAGE_SIZE); | |
772 | memset(empty_zero_page, 0, PAGE_SIZE); | |
773 | } | |
774 | ||
775 | static void __init gateway_init(void) | |
776 | { | |
777 | unsigned long linux_gateway_page_addr; | |
778 | /* FIXME: This is 'const' in order to trick the compiler | |
779 | into not treating it as DP-relative data. */ | |
780 | extern void * const linux_gateway_page; | |
781 | ||
782 | linux_gateway_page_addr = LINUX_GATEWAY_ADDR & PAGE_MASK; | |
783 | ||
784 | /* | |
785 | * Setup Linux Gateway page. | |
786 | * | |
787 | * The Linux gateway page will reside in kernel space (on virtual | |
788 | * page 0), so it doesn't need to be aliased into user space. | |
789 | */ | |
790 | ||
791 | map_pages(linux_gateway_page_addr, __pa(&linux_gateway_page), | |
792 | PAGE_SIZE, PAGE_GATEWAY); | |
793 | } | |
794 | ||
795 | #ifdef CONFIG_HPUX | |
796 | void | |
797 | map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm) | |
798 | { | |
799 | pgd_t *pg_dir; | |
800 | pmd_t *pmd; | |
801 | pte_t *pg_table; | |
802 | unsigned long start_pmd; | |
803 | unsigned long start_pte; | |
804 | unsigned long address; | |
805 | unsigned long hpux_gw_page_addr; | |
806 | /* FIXME: This is 'const' in order to trick the compiler | |
807 | into not treating it as DP-relative data. */ | |
808 | extern void * const hpux_gateway_page; | |
809 | ||
810 | hpux_gw_page_addr = HPUX_GATEWAY_ADDR & PAGE_MASK; | |
811 | ||
812 | /* | |
813 | * Setup HP-UX Gateway page. | |
814 | * | |
815 | * The HP-UX gateway page resides in the user address space, | |
816 | * so it needs to be aliased into each process. | |
817 | */ | |
818 | ||
819 | pg_dir = pgd_offset(mm,hpux_gw_page_addr); | |
820 | ||
821 | #if PTRS_PER_PMD == 1 | |
822 | start_pmd = 0; | |
823 | #else | |
824 | start_pmd = ((hpux_gw_page_addr >> PMD_SHIFT) & (PTRS_PER_PMD - 1)); | |
825 | #endif | |
826 | start_pte = ((hpux_gw_page_addr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)); | |
827 | ||
828 | address = __pa(&hpux_gateway_page); | |
829 | #if PTRS_PER_PMD == 1 | |
830 | pmd = (pmd_t *)__pa(pg_dir); | |
831 | #else | |
832 | pmd = (pmd_t *) pgd_address(*pg_dir); | |
833 | ||
834 | /* | |
835 | * pmd is physical at this point | |
836 | */ | |
837 | ||
838 | if (!pmd) { | |
839 | pmd = (pmd_t *) get_zeroed_page(GFP_KERNEL); | |
840 | pmd = (pmd_t *) __pa(pmd); | |
841 | } | |
842 | ||
843 | __pgd_val_set(*pg_dir, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pmd); | |
844 | #endif | |
845 | /* now change pmd to kernel virtual addresses */ | |
846 | ||
847 | pmd = (pmd_t *)__va(pmd) + start_pmd; | |
848 | ||
849 | /* | |
850 | * pg_table is physical at this point | |
851 | */ | |
852 | ||
853 | pg_table = (pte_t *) pmd_address(*pmd); | |
854 | if (!pg_table) | |
855 | pg_table = (pte_t *) __pa(get_zeroed_page(GFP_KERNEL)); | |
856 | ||
857 | __pmd_val_set(*pmd, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pg_table); | |
858 | ||
859 | /* now change pg_table to kernel virtual addresses */ | |
860 | ||
861 | pg_table = (pte_t *) __va(pg_table) + start_pte; | |
862 | set_pte(pg_table, __mk_pte(address, PAGE_GATEWAY)); | |
863 | } | |
864 | EXPORT_SYMBOL(map_hpux_gateway_page); | |
865 | #endif | |
866 | ||
1da177e4 LT |
867 | void __init paging_init(void) |
868 | { | |
869 | int i; | |
870 | ||
871 | setup_bootmem(); | |
872 | pagetable_init(); | |
873 | gateway_init(); | |
874 | flush_cache_all_local(); /* start with known state */ | |
ce33941f | 875 | flush_tlb_all_local(NULL); |
1da177e4 LT |
876 | |
877 | for (i = 0; i < npmem_ranges; i++) { | |
f06a9684 | 878 | unsigned long zones_size[MAX_NR_ZONES] = { 0, }; |
1da177e4 | 879 | |
00592837 | 880 | zones_size[ZONE_NORMAL] = pmem_ranges[i].pages; |
1da177e4 LT |
881 | |
882 | #ifdef CONFIG_DISCONTIGMEM | |
883 | /* Need to initialize the pfnnid_map before we can initialize | |
884 | the zone */ | |
885 | { | |
886 | int j; | |
887 | for (j = (pmem_ranges[i].start_pfn >> PFNNID_SHIFT); | |
888 | j <= ((pmem_ranges[i].start_pfn + pmem_ranges[i].pages) >> PFNNID_SHIFT); | |
889 | j++) { | |
890 | pfnnid_map[j] = i; | |
891 | } | |
892 | } | |
893 | #endif | |
894 | ||
9109fb7b | 895 | free_area_init_node(i, zones_size, |
1da177e4 LT |
896 | pmem_ranges[i].start_pfn, NULL); |
897 | } | |
898 | } | |
899 | ||
900 | #ifdef CONFIG_PA20 | |
901 | ||
902 | /* | |
7022672e | 903 | * Currently, all PA20 chips have 18 bit protection IDs, which is the |
1da177e4 LT |
904 | * limiting factor (space ids are 32 bits). |
905 | */ | |
906 | ||
907 | #define NR_SPACE_IDS 262144 | |
908 | ||
909 | #else | |
910 | ||
911 | /* | |
7022672e SA |
912 | * Currently we have a one-to-one relationship between space IDs and |
913 | * protection IDs. Older parisc chips (PCXS, PCXT, PCXL, PCXL2) only | |
914 | * support 15 bit protection IDs, so that is the limiting factor. | |
915 | * PCXT' has 18 bit protection IDs, but only 16 bit spaceids, so it's | |
1da177e4 LT |
916 | * probably not worth the effort for a special case here. |
917 | */ | |
918 | ||
919 | #define NR_SPACE_IDS 32768 | |
920 | ||
921 | #endif /* !CONFIG_PA20 */ | |
922 | ||
923 | #define RECYCLE_THRESHOLD (NR_SPACE_IDS / 2) | |
924 | #define SID_ARRAY_SIZE (NR_SPACE_IDS / (8 * sizeof(long))) | |
925 | ||
926 | static unsigned long space_id[SID_ARRAY_SIZE] = { 1 }; /* disallow space 0 */ | |
927 | static unsigned long dirty_space_id[SID_ARRAY_SIZE]; | |
928 | static unsigned long space_id_index; | |
929 | static unsigned long free_space_ids = NR_SPACE_IDS - 1; | |
930 | static unsigned long dirty_space_ids = 0; | |
931 | ||
932 | static DEFINE_SPINLOCK(sid_lock); | |
933 | ||
934 | unsigned long alloc_sid(void) | |
935 | { | |
936 | unsigned long index; | |
937 | ||
938 | spin_lock(&sid_lock); | |
939 | ||
940 | if (free_space_ids == 0) { | |
941 | if (dirty_space_ids != 0) { | |
942 | spin_unlock(&sid_lock); | |
943 | flush_tlb_all(); /* flush_tlb_all() calls recycle_sids() */ | |
944 | spin_lock(&sid_lock); | |
945 | } | |
2fd83038 | 946 | BUG_ON(free_space_ids == 0); |
1da177e4 LT |
947 | } |
948 | ||
949 | free_space_ids--; | |
950 | ||
951 | index = find_next_zero_bit(space_id, NR_SPACE_IDS, space_id_index); | |
952 | space_id[index >> SHIFT_PER_LONG] |= (1L << (index & (BITS_PER_LONG - 1))); | |
953 | space_id_index = index; | |
954 | ||
955 | spin_unlock(&sid_lock); | |
956 | ||
957 | return index << SPACEID_SHIFT; | |
958 | } | |
959 | ||
960 | void free_sid(unsigned long spaceid) | |
961 | { | |
962 | unsigned long index = spaceid >> SPACEID_SHIFT; | |
963 | unsigned long *dirty_space_offset; | |
964 | ||
965 | dirty_space_offset = dirty_space_id + (index >> SHIFT_PER_LONG); | |
966 | index &= (BITS_PER_LONG - 1); | |
967 | ||
968 | spin_lock(&sid_lock); | |
969 | ||
2fd83038 | 970 | BUG_ON(*dirty_space_offset & (1L << index)); /* attempt to free space id twice */ |
1da177e4 LT |
971 | |
972 | *dirty_space_offset |= (1L << index); | |
973 | dirty_space_ids++; | |
974 | ||
975 | spin_unlock(&sid_lock); | |
976 | } | |
977 | ||
978 | ||
979 | #ifdef CONFIG_SMP | |
980 | static void get_dirty_sids(unsigned long *ndirtyptr,unsigned long *dirty_array) | |
981 | { | |
982 | int i; | |
983 | ||
984 | /* NOTE: sid_lock must be held upon entry */ | |
985 | ||
986 | *ndirtyptr = dirty_space_ids; | |
987 | if (dirty_space_ids != 0) { | |
988 | for (i = 0; i < SID_ARRAY_SIZE; i++) { | |
989 | dirty_array[i] = dirty_space_id[i]; | |
990 | dirty_space_id[i] = 0; | |
991 | } | |
992 | dirty_space_ids = 0; | |
993 | } | |
994 | ||
995 | return; | |
996 | } | |
997 | ||
998 | static void recycle_sids(unsigned long ndirty,unsigned long *dirty_array) | |
999 | { | |
1000 | int i; | |
1001 | ||
1002 | /* NOTE: sid_lock must be held upon entry */ | |
1003 | ||
1004 | if (ndirty != 0) { | |
1005 | for (i = 0; i < SID_ARRAY_SIZE; i++) { | |
1006 | space_id[i] ^= dirty_array[i]; | |
1007 | } | |
1008 | ||
1009 | free_space_ids += ndirty; | |
1010 | space_id_index = 0; | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | #else /* CONFIG_SMP */ | |
1015 | ||
1016 | static void recycle_sids(void) | |
1017 | { | |
1018 | int i; | |
1019 | ||
1020 | /* NOTE: sid_lock must be held upon entry */ | |
1021 | ||
1022 | if (dirty_space_ids != 0) { | |
1023 | for (i = 0; i < SID_ARRAY_SIZE; i++) { | |
1024 | space_id[i] ^= dirty_space_id[i]; | |
1025 | dirty_space_id[i] = 0; | |
1026 | } | |
1027 | ||
1028 | free_space_ids += dirty_space_ids; | |
1029 | dirty_space_ids = 0; | |
1030 | space_id_index = 0; | |
1031 | } | |
1032 | } | |
1033 | #endif | |
1034 | ||
1035 | /* | |
1036 | * flush_tlb_all() calls recycle_sids(), since whenever the entire tlb is | |
1037 | * purged, we can safely reuse the space ids that were released but | |
1038 | * not flushed from the tlb. | |
1039 | */ | |
1040 | ||
1041 | #ifdef CONFIG_SMP | |
1042 | ||
1043 | static unsigned long recycle_ndirty; | |
1044 | static unsigned long recycle_dirty_array[SID_ARRAY_SIZE]; | |
2fd83038 | 1045 | static unsigned int recycle_inuse; |
1da177e4 LT |
1046 | |
1047 | void flush_tlb_all(void) | |
1048 | { | |
1049 | int do_recycle; | |
1050 | ||
1051 | do_recycle = 0; | |
1052 | spin_lock(&sid_lock); | |
1053 | if (dirty_space_ids > RECYCLE_THRESHOLD) { | |
2fd83038 | 1054 | BUG_ON(recycle_inuse); /* FIXME: Use a semaphore/wait queue here */ |
1da177e4 LT |
1055 | get_dirty_sids(&recycle_ndirty,recycle_dirty_array); |
1056 | recycle_inuse++; | |
1057 | do_recycle++; | |
1058 | } | |
1059 | spin_unlock(&sid_lock); | |
15c8b6c1 | 1060 | on_each_cpu(flush_tlb_all_local, NULL, 1); |
1da177e4 LT |
1061 | if (do_recycle) { |
1062 | spin_lock(&sid_lock); | |
1063 | recycle_sids(recycle_ndirty,recycle_dirty_array); | |
1064 | recycle_inuse = 0; | |
1065 | spin_unlock(&sid_lock); | |
1066 | } | |
1067 | } | |
1068 | #else | |
1069 | void flush_tlb_all(void) | |
1070 | { | |
1071 | spin_lock(&sid_lock); | |
1b2425e3 | 1072 | flush_tlb_all_local(NULL); |
1da177e4 LT |
1073 | recycle_sids(); |
1074 | spin_unlock(&sid_lock); | |
1075 | } | |
1076 | #endif | |
1077 | ||
1078 | #ifdef CONFIG_BLK_DEV_INITRD | |
1079 | void free_initrd_mem(unsigned long start, unsigned long end) | |
1080 | { | |
94c3e87a HD |
1081 | if (start >= end) |
1082 | return; | |
1083 | printk(KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10); | |
1da177e4 LT |
1084 | for (; start < end; start += PAGE_SIZE) { |
1085 | ClearPageReserved(virt_to_page(start)); | |
7835e98b | 1086 | init_page_count(virt_to_page(start)); |
1da177e4 LT |
1087 | free_page(start); |
1088 | num_physpages++; | |
1089 | totalram_pages++; | |
1090 | } | |
1da177e4 LT |
1091 | } |
1092 | #endif |