Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/config.h> |
| 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> |
| 27 | #include <asm/tlb.h> |
| 28 | #include <asm/pdc_chassis.h> |
| 29 | #include <asm/mmzone.h> |
| 30 | |
| 31 | DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); |
| 32 | |
| 33 | extern char _text; /* start of kernel code, defined by linker */ |
| 34 | extern int data_start; |
| 35 | extern char _end; /* end of BSS, defined by linker */ |
| 36 | extern char __init_begin, __init_end; |
| 37 | |
| 38 | #ifdef CONFIG_DISCONTIGMEM |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 39 | struct node_map_data node_data[MAX_NUMNODES] __read_mostly; |
| 40 | bootmem_data_t bmem_data[MAX_NUMNODES] __read_mostly; |
| 41 | unsigned char pfnnid_map[PFNNID_MAP_MAX] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #endif |
| 43 | |
| 44 | static struct resource data_resource = { |
| 45 | .name = "Kernel data", |
| 46 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 47 | }; |
| 48 | |
| 49 | static struct resource code_resource = { |
| 50 | .name = "Kernel code", |
| 51 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 52 | }; |
| 53 | |
| 54 | static struct resource pdcdata_resource = { |
| 55 | .name = "PDC data (Page Zero)", |
| 56 | .start = 0, |
| 57 | .end = 0x9ff, |
| 58 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 59 | }; |
| 60 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 61 | static struct resource sysram_resources[MAX_PHYSMEM_RANGES] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
| 63 | /* The following array is initialized from the firmware specific |
| 64 | * information retrieved in kernel/inventory.c. |
| 65 | */ |
| 66 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 67 | physmem_range_t pmem_ranges[MAX_PHYSMEM_RANGES] __read_mostly; |
| 68 | int npmem_ranges __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
| 70 | #ifdef __LP64__ |
| 71 | #define MAX_MEM (~0UL) |
| 72 | #else /* !__LP64__ */ |
| 73 | #define MAX_MEM (3584U*1024U*1024U) |
| 74 | #endif /* !__LP64__ */ |
| 75 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 76 | static unsigned long mem_limit __read_mostly = MAX_MEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | static void __init mem_limit_func(void) |
| 79 | { |
| 80 | char *cp, *end; |
| 81 | unsigned long limit; |
| 82 | extern char saved_command_line[]; |
| 83 | |
| 84 | /* We need this before __setup() functions are called */ |
| 85 | |
| 86 | limit = MAX_MEM; |
| 87 | for (cp = saved_command_line; *cp; ) { |
| 88 | if (memcmp(cp, "mem=", 4) == 0) { |
| 89 | cp += 4; |
| 90 | limit = memparse(cp, &end); |
| 91 | if (end != cp) |
| 92 | break; |
| 93 | cp = end; |
| 94 | } else { |
| 95 | while (*cp != ' ' && *cp) |
| 96 | ++cp; |
| 97 | while (*cp == ' ') |
| 98 | ++cp; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | if (limit < mem_limit) |
| 103 | mem_limit = limit; |
| 104 | } |
| 105 | |
| 106 | #define MAX_GAP (0x40000000UL >> PAGE_SHIFT) |
| 107 | |
| 108 | static void __init setup_bootmem(void) |
| 109 | { |
| 110 | unsigned long bootmap_size; |
| 111 | unsigned long mem_max; |
| 112 | unsigned long bootmap_pages; |
| 113 | unsigned long bootmap_start_pfn; |
| 114 | unsigned long bootmap_pfn; |
| 115 | #ifndef CONFIG_DISCONTIGMEM |
| 116 | physmem_range_t pmem_holes[MAX_PHYSMEM_RANGES - 1]; |
| 117 | int npmem_holes; |
| 118 | #endif |
| 119 | int i, sysram_resource_count; |
| 120 | |
| 121 | disable_sr_hashing(); /* Turn off space register hashing */ |
| 122 | |
| 123 | /* |
| 124 | * Sort the ranges. Since the number of ranges is typically |
| 125 | * small, and performance is not an issue here, just do |
| 126 | * a simple insertion sort. |
| 127 | */ |
| 128 | |
| 129 | for (i = 1; i < npmem_ranges; i++) { |
| 130 | int j; |
| 131 | |
| 132 | for (j = i; j > 0; j--) { |
| 133 | unsigned long tmp; |
| 134 | |
| 135 | if (pmem_ranges[j-1].start_pfn < |
| 136 | pmem_ranges[j].start_pfn) { |
| 137 | |
| 138 | break; |
| 139 | } |
| 140 | tmp = pmem_ranges[j-1].start_pfn; |
| 141 | pmem_ranges[j-1].start_pfn = pmem_ranges[j].start_pfn; |
| 142 | pmem_ranges[j].start_pfn = tmp; |
| 143 | tmp = pmem_ranges[j-1].pages; |
| 144 | pmem_ranges[j-1].pages = pmem_ranges[j].pages; |
| 145 | pmem_ranges[j].pages = tmp; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | #ifndef CONFIG_DISCONTIGMEM |
| 150 | /* |
| 151 | * Throw out ranges that are too far apart (controlled by |
| 152 | * MAX_GAP). |
| 153 | */ |
| 154 | |
| 155 | for (i = 1; i < npmem_ranges; i++) { |
| 156 | if (pmem_ranges[i].start_pfn - |
| 157 | (pmem_ranges[i-1].start_pfn + |
| 158 | pmem_ranges[i-1].pages) > MAX_GAP) { |
| 159 | npmem_ranges = i; |
| 160 | printk("Large gap in memory detected (%ld pages). " |
| 161 | "Consider turning on CONFIG_DISCONTIGMEM\n", |
| 162 | pmem_ranges[i].start_pfn - |
| 163 | (pmem_ranges[i-1].start_pfn + |
| 164 | pmem_ranges[i-1].pages)); |
| 165 | break; |
| 166 | } |
| 167 | } |
| 168 | #endif |
| 169 | |
| 170 | if (npmem_ranges > 1) { |
| 171 | |
| 172 | /* Print the memory ranges */ |
| 173 | |
| 174 | printk(KERN_INFO "Memory Ranges:\n"); |
| 175 | |
| 176 | for (i = 0; i < npmem_ranges; i++) { |
| 177 | unsigned long start; |
| 178 | unsigned long size; |
| 179 | |
| 180 | size = (pmem_ranges[i].pages << PAGE_SHIFT); |
| 181 | start = (pmem_ranges[i].start_pfn << PAGE_SHIFT); |
| 182 | printk(KERN_INFO "%2d) Start 0x%016lx End 0x%016lx Size %6ld MB\n", |
| 183 | i,start, start + (size - 1), size >> 20); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | sysram_resource_count = npmem_ranges; |
| 188 | for (i = 0; i < sysram_resource_count; i++) { |
| 189 | struct resource *res = &sysram_resources[i]; |
| 190 | res->name = "System RAM"; |
| 191 | res->start = pmem_ranges[i].start_pfn << PAGE_SHIFT; |
| 192 | res->end = res->start + (pmem_ranges[i].pages << PAGE_SHIFT)-1; |
| 193 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 194 | request_resource(&iomem_resource, res); |
| 195 | } |
| 196 | |
| 197 | /* |
| 198 | * For 32 bit kernels we limit the amount of memory we can |
| 199 | * support, in order to preserve enough kernel address space |
| 200 | * for other purposes. For 64 bit kernels we don't normally |
| 201 | * limit the memory, but this mechanism can be used to |
| 202 | * artificially limit the amount of memory (and it is written |
| 203 | * to work with multiple memory ranges). |
| 204 | */ |
| 205 | |
| 206 | mem_limit_func(); /* check for "mem=" argument */ |
| 207 | |
| 208 | mem_max = 0; |
| 209 | num_physpages = 0; |
| 210 | for (i = 0; i < npmem_ranges; i++) { |
| 211 | unsigned long rsize; |
| 212 | |
| 213 | rsize = pmem_ranges[i].pages << PAGE_SHIFT; |
| 214 | if ((mem_max + rsize) > mem_limit) { |
| 215 | printk(KERN_WARNING "Memory truncated to %ld MB\n", mem_limit >> 20); |
| 216 | if (mem_max == mem_limit) |
| 217 | npmem_ranges = i; |
| 218 | else { |
| 219 | pmem_ranges[i].pages = (mem_limit >> PAGE_SHIFT) |
| 220 | - (mem_max >> PAGE_SHIFT); |
| 221 | npmem_ranges = i + 1; |
| 222 | mem_max = mem_limit; |
| 223 | } |
| 224 | num_physpages += pmem_ranges[i].pages; |
| 225 | break; |
| 226 | } |
| 227 | num_physpages += pmem_ranges[i].pages; |
| 228 | mem_max += rsize; |
| 229 | } |
| 230 | |
| 231 | printk(KERN_INFO "Total Memory: %ld MB\n",mem_max >> 20); |
| 232 | |
| 233 | #ifndef CONFIG_DISCONTIGMEM |
| 234 | /* Merge the ranges, keeping track of the holes */ |
| 235 | |
| 236 | { |
| 237 | unsigned long end_pfn; |
| 238 | unsigned long hole_pages; |
| 239 | |
| 240 | npmem_holes = 0; |
| 241 | end_pfn = pmem_ranges[0].start_pfn + pmem_ranges[0].pages; |
| 242 | for (i = 1; i < npmem_ranges; i++) { |
| 243 | |
| 244 | hole_pages = pmem_ranges[i].start_pfn - end_pfn; |
| 245 | if (hole_pages) { |
| 246 | pmem_holes[npmem_holes].start_pfn = end_pfn; |
| 247 | pmem_holes[npmem_holes++].pages = hole_pages; |
| 248 | end_pfn += hole_pages; |
| 249 | } |
| 250 | end_pfn += pmem_ranges[i].pages; |
| 251 | } |
| 252 | |
| 253 | pmem_ranges[0].pages = end_pfn - pmem_ranges[0].start_pfn; |
| 254 | npmem_ranges = 1; |
| 255 | } |
| 256 | #endif |
| 257 | |
| 258 | bootmap_pages = 0; |
| 259 | for (i = 0; i < npmem_ranges; i++) |
| 260 | bootmap_pages += bootmem_bootmap_pages(pmem_ranges[i].pages); |
| 261 | |
| 262 | bootmap_start_pfn = PAGE_ALIGN(__pa((unsigned long) &_end)) >> PAGE_SHIFT; |
| 263 | |
| 264 | #ifdef CONFIG_DISCONTIGMEM |
| 265 | for (i = 0; i < MAX_PHYSMEM_RANGES; i++) { |
| 266 | memset(NODE_DATA(i), 0, sizeof(pg_data_t)); |
| 267 | NODE_DATA(i)->bdata = &bmem_data[i]; |
| 268 | } |
| 269 | memset(pfnnid_map, 0xff, sizeof(pfnnid_map)); |
| 270 | |
| 271 | for (i = 0; i < npmem_ranges; i++) |
| 272 | node_set_online(i); |
| 273 | #endif |
| 274 | |
| 275 | /* |
| 276 | * Initialize and free the full range of memory in each range. |
| 277 | * Note that the only writing these routines do are to the bootmap, |
| 278 | * and we've made sure to locate the bootmap properly so that they |
| 279 | * won't be writing over anything important. |
| 280 | */ |
| 281 | |
| 282 | bootmap_pfn = bootmap_start_pfn; |
| 283 | max_pfn = 0; |
| 284 | for (i = 0; i < npmem_ranges; i++) { |
| 285 | unsigned long start_pfn; |
| 286 | unsigned long npages; |
| 287 | |
| 288 | start_pfn = pmem_ranges[i].start_pfn; |
| 289 | npages = pmem_ranges[i].pages; |
| 290 | |
| 291 | bootmap_size = init_bootmem_node(NODE_DATA(i), |
| 292 | bootmap_pfn, |
| 293 | start_pfn, |
| 294 | (start_pfn + npages) ); |
| 295 | free_bootmem_node(NODE_DATA(i), |
| 296 | (start_pfn << PAGE_SHIFT), |
| 297 | (npages << PAGE_SHIFT) ); |
| 298 | bootmap_pfn += (bootmap_size + PAGE_SIZE - 1) >> PAGE_SHIFT; |
| 299 | if ((start_pfn + npages) > max_pfn) |
| 300 | max_pfn = start_pfn + npages; |
| 301 | } |
| 302 | |
Grant Grundler | 5cdb820 | 2006-01-10 20:47:57 -0500 | [diff] [blame] | 303 | /* IOMMU is always used to access "high mem" on those boxes |
| 304 | * that can support enough mem that a PCI device couldn't |
| 305 | * directly DMA to any physical addresses. |
| 306 | * ISA DMA support will need to revisit this. |
| 307 | */ |
| 308 | max_low_pfn = max_pfn; |
| 309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | if ((bootmap_pfn - bootmap_start_pfn) != bootmap_pages) { |
| 311 | printk(KERN_WARNING "WARNING! bootmap sizing is messed up!\n"); |
| 312 | BUG(); |
| 313 | } |
| 314 | |
| 315 | /* reserve PAGE0 pdc memory, kernel text/data/bss & bootmap */ |
| 316 | |
| 317 | #define PDC_CONSOLE_IO_IODC_SIZE 32768 |
| 318 | |
| 319 | reserve_bootmem_node(NODE_DATA(0), 0UL, |
| 320 | (unsigned long)(PAGE0->mem_free + PDC_CONSOLE_IO_IODC_SIZE)); |
| 321 | reserve_bootmem_node(NODE_DATA(0),__pa((unsigned long)&_text), |
| 322 | (unsigned long)(&_end - &_text)); |
| 323 | reserve_bootmem_node(NODE_DATA(0), (bootmap_start_pfn << PAGE_SHIFT), |
| 324 | ((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT)); |
| 325 | |
| 326 | #ifndef CONFIG_DISCONTIGMEM |
| 327 | |
| 328 | /* reserve the holes */ |
| 329 | |
| 330 | for (i = 0; i < npmem_holes; i++) { |
| 331 | reserve_bootmem_node(NODE_DATA(0), |
| 332 | (pmem_holes[i].start_pfn << PAGE_SHIFT), |
| 333 | (pmem_holes[i].pages << PAGE_SHIFT)); |
| 334 | } |
| 335 | #endif |
| 336 | |
| 337 | #ifdef CONFIG_BLK_DEV_INITRD |
| 338 | if (initrd_start) { |
| 339 | printk(KERN_INFO "initrd: %08lx-%08lx\n", initrd_start, initrd_end); |
| 340 | if (__pa(initrd_start) < mem_max) { |
| 341 | unsigned long initrd_reserve; |
| 342 | |
| 343 | if (__pa(initrd_end) > mem_max) { |
| 344 | initrd_reserve = mem_max - __pa(initrd_start); |
| 345 | } else { |
| 346 | initrd_reserve = initrd_end - initrd_start; |
| 347 | } |
| 348 | initrd_below_start_ok = 1; |
| 349 | printk(KERN_INFO "initrd: reserving %08lx-%08lx (mem_max %08lx)\n", __pa(initrd_start), __pa(initrd_start) + initrd_reserve, mem_max); |
| 350 | |
| 351 | reserve_bootmem_node(NODE_DATA(0),__pa(initrd_start), initrd_reserve); |
| 352 | } |
| 353 | } |
| 354 | #endif |
| 355 | |
| 356 | data_resource.start = virt_to_phys(&data_start); |
| 357 | data_resource.end = virt_to_phys(&_end)-1; |
| 358 | code_resource.start = virt_to_phys(&_text); |
| 359 | code_resource.end = virt_to_phys(&data_start)-1; |
| 360 | |
| 361 | /* We don't know which region the kernel will be in, so try |
| 362 | * all of them. |
| 363 | */ |
| 364 | for (i = 0; i < sysram_resource_count; i++) { |
| 365 | struct resource *res = &sysram_resources[i]; |
| 366 | request_resource(res, &code_resource); |
| 367 | request_resource(res, &data_resource); |
| 368 | } |
| 369 | request_resource(&sysram_resources[0], &pdcdata_resource); |
| 370 | } |
| 371 | |
| 372 | void free_initmem(void) |
| 373 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | unsigned long addr; |
| 375 | |
| 376 | printk(KERN_INFO "Freeing unused kernel memory: "); |
| 377 | |
Helge Deller | 81a3de3 | 2006-01-15 12:11:50 -0700 | [diff] [blame] | 378 | #ifdef CONFIG_DEBUG_KERNEL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | /* Attempt to catch anyone trying to execute code here |
| 380 | * by filling the page with BRK insns. |
| 381 | * |
| 382 | * If we disable interrupts for all CPUs, then IPI stops working. |
| 383 | * Kinda breaks the global cache flushing. |
| 384 | */ |
| 385 | local_irq_disable(); |
| 386 | |
| 387 | memset(&__init_begin, 0x00, |
| 388 | (unsigned long)&__init_end - (unsigned long)&__init_begin); |
| 389 | |
| 390 | flush_data_cache(); |
| 391 | asm volatile("sync" : : ); |
| 392 | flush_icache_range((unsigned long)&__init_begin, (unsigned long)&__init_end); |
| 393 | asm volatile("sync" : : ); |
| 394 | |
| 395 | local_irq_enable(); |
| 396 | #endif |
| 397 | |
| 398 | addr = (unsigned long)(&__init_begin); |
| 399 | for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { |
| 400 | ClearPageReserved(virt_to_page(addr)); |
Nick Piggin | 7835e98 | 2006-03-22 00:08:40 -0800 | [diff] [blame] | 401 | init_page_count(virt_to_page(addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | free_page(addr); |
| 403 | num_physpages++; |
| 404 | totalram_pages++; |
| 405 | } |
| 406 | |
| 407 | /* set up a new led state on systems shipped LED State panel */ |
| 408 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE); |
| 409 | |
| 410 | printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | |
Helge Deller | 1bcdd85 | 2006-01-13 13:21:06 -0700 | [diff] [blame] | 413 | |
| 414 | #ifdef CONFIG_DEBUG_RODATA |
| 415 | void mark_rodata_ro(void) |
| 416 | { |
| 417 | extern char __start_rodata, __end_rodata; |
| 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", |
| 421 | (unsigned long)(&__end_rodata - &__start_rodata) >> 10); |
| 422 | } |
| 423 | #endif |
| 424 | |
| 425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 447 | void *vmalloc_start __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | EXPORT_SYMBOL(vmalloc_start); |
| 449 | |
| 450 | #ifdef CONFIG_PA11 |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 451 | unsigned long pcxl_dma_start __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | #endif |
| 453 | |
| 454 | void __init mem_init(void) |
| 455 | { |
| 456 | high_memory = __va((max_pfn << PAGE_SHIFT)); |
| 457 | |
| 458 | #ifndef CONFIG_DISCONTIGMEM |
| 459 | max_mapnr = page_to_pfn(virt_to_page(high_memory - 1)) + 1; |
| 460 | totalram_pages += free_all_bootmem(); |
| 461 | #else |
| 462 | { |
| 463 | int i; |
| 464 | |
| 465 | for (i = 0; i < npmem_ranges; i++) |
| 466 | totalram_pages += free_all_bootmem_node(NODE_DATA(i)); |
| 467 | } |
| 468 | #endif |
| 469 | |
| 470 | printk(KERN_INFO "Memory: %luk available\n", num_physpages << (PAGE_SHIFT-10)); |
| 471 | |
| 472 | #ifdef CONFIG_PA11 |
| 473 | if (hppa_dma_ops == &pcxl_dma_ops) { |
| 474 | pcxl_dma_start = (unsigned long)SET_MAP_OFFSET(MAP_START); |
| 475 | vmalloc_start = SET_MAP_OFFSET(pcxl_dma_start + PCXL_DMA_MAP_SIZE); |
| 476 | } else { |
| 477 | pcxl_dma_start = 0; |
| 478 | vmalloc_start = SET_MAP_OFFSET(MAP_START); |
| 479 | } |
| 480 | #else |
| 481 | vmalloc_start = SET_MAP_OFFSET(MAP_START); |
| 482 | #endif |
| 483 | |
| 484 | } |
| 485 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 486 | unsigned long *empty_zero_page __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
| 488 | void show_mem(void) |
| 489 | { |
| 490 | int i,free = 0,total = 0,reserved = 0; |
| 491 | int shared = 0, cached = 0; |
| 492 | |
| 493 | printk(KERN_INFO "Mem-info:\n"); |
| 494 | show_free_areas(); |
| 495 | printk(KERN_INFO "Free swap: %6ldkB\n", |
| 496 | nr_swap_pages<<(PAGE_SHIFT-10)); |
| 497 | #ifndef CONFIG_DISCONTIGMEM |
| 498 | i = max_mapnr; |
| 499 | while (i-- > 0) { |
| 500 | total++; |
| 501 | if (PageReserved(mem_map+i)) |
| 502 | reserved++; |
| 503 | else if (PageSwapCache(mem_map+i)) |
| 504 | cached++; |
| 505 | else if (!page_count(&mem_map[i])) |
| 506 | free++; |
| 507 | else |
| 508 | shared += page_count(&mem_map[i]) - 1; |
| 509 | } |
| 510 | #else |
| 511 | for (i = 0; i < npmem_ranges; i++) { |
| 512 | int j; |
| 513 | |
| 514 | for (j = node_start_pfn(i); j < node_end_pfn(i); j++) { |
| 515 | struct page *p; |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 516 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 518 | pgdat_resize_lock(NODE_DATA(i), &flags); |
Dave Hansen | 408fde8 | 2005-06-23 00:07:37 -0700 | [diff] [blame] | 519 | p = nid_page_nr(i, j) - node_start_pfn(i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
| 521 | total++; |
| 522 | if (PageReserved(p)) |
| 523 | reserved++; |
| 524 | else if (PageSwapCache(p)) |
| 525 | cached++; |
| 526 | else if (!page_count(p)) |
| 527 | free++; |
| 528 | else |
| 529 | shared += page_count(p) - 1; |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 530 | pgdat_resize_unlock(NODE_DATA(i), &flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
| 532 | } |
| 533 | #endif |
| 534 | printk(KERN_INFO "%d pages of RAM\n", total); |
| 535 | printk(KERN_INFO "%d reserved pages\n", reserved); |
| 536 | printk(KERN_INFO "%d pages shared\n", shared); |
| 537 | printk(KERN_INFO "%d pages swap cached\n", cached); |
| 538 | |
| 539 | |
| 540 | #ifdef CONFIG_DISCONTIGMEM |
| 541 | { |
| 542 | struct zonelist *zl; |
| 543 | int i, j, k; |
| 544 | |
| 545 | for (i = 0; i < npmem_ranges; i++) { |
| 546 | for (j = 0; j < MAX_NR_ZONES; j++) { |
| 547 | zl = NODE_DATA(i)->node_zonelists + j; |
| 548 | |
| 549 | printk("Zone list for zone %d on node %d: ", j, i); |
| 550 | for (k = 0; zl->zones[k] != NULL; k++) |
| 551 | printk("[%d/%s] ", zl->zones[k]->zone_pgdat->node_id, zl->zones[k]->name); |
| 552 | printk("\n"); |
| 553 | } |
| 554 | } |
| 555 | } |
| 556 | #endif |
| 557 | } |
| 558 | |
| 559 | |
| 560 | static void __init map_pages(unsigned long start_vaddr, unsigned long start_paddr, unsigned long size, pgprot_t pgprot) |
| 561 | { |
| 562 | pgd_t *pg_dir; |
| 563 | pmd_t *pmd; |
| 564 | pte_t *pg_table; |
| 565 | unsigned long end_paddr; |
| 566 | unsigned long start_pmd; |
| 567 | unsigned long start_pte; |
| 568 | unsigned long tmp1; |
| 569 | unsigned long tmp2; |
| 570 | unsigned long address; |
| 571 | unsigned long ro_start; |
| 572 | unsigned long ro_end; |
| 573 | unsigned long fv_addr; |
| 574 | unsigned long gw_addr; |
| 575 | extern const unsigned long fault_vector_20; |
| 576 | extern void * const linux_gateway_page; |
| 577 | |
| 578 | ro_start = __pa((unsigned long)&_text); |
| 579 | ro_end = __pa((unsigned long)&data_start); |
| 580 | fv_addr = __pa((unsigned long)&fault_vector_20) & PAGE_MASK; |
| 581 | gw_addr = __pa((unsigned long)&linux_gateway_page) & PAGE_MASK; |
| 582 | |
| 583 | end_paddr = start_paddr + size; |
| 584 | |
| 585 | pg_dir = pgd_offset_k(start_vaddr); |
| 586 | |
| 587 | #if PTRS_PER_PMD == 1 |
| 588 | start_pmd = 0; |
| 589 | #else |
| 590 | start_pmd = ((start_vaddr >> PMD_SHIFT) & (PTRS_PER_PMD - 1)); |
| 591 | #endif |
| 592 | start_pte = ((start_vaddr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)); |
| 593 | |
| 594 | address = start_paddr; |
| 595 | while (address < end_paddr) { |
| 596 | #if PTRS_PER_PMD == 1 |
| 597 | pmd = (pmd_t *)__pa(pg_dir); |
| 598 | #else |
| 599 | pmd = (pmd_t *)pgd_address(*pg_dir); |
| 600 | |
| 601 | /* |
| 602 | * pmd is physical at this point |
| 603 | */ |
| 604 | |
| 605 | if (!pmd) { |
| 606 | pmd = (pmd_t *) alloc_bootmem_low_pages_node(NODE_DATA(0),PAGE_SIZE << PMD_ORDER); |
| 607 | pmd = (pmd_t *) __pa(pmd); |
| 608 | } |
| 609 | |
| 610 | pgd_populate(NULL, pg_dir, __va(pmd)); |
| 611 | #endif |
| 612 | pg_dir++; |
| 613 | |
| 614 | /* now change pmd to kernel virtual addresses */ |
| 615 | |
| 616 | pmd = (pmd_t *)__va(pmd) + start_pmd; |
| 617 | for (tmp1 = start_pmd; tmp1 < PTRS_PER_PMD; tmp1++,pmd++) { |
| 618 | |
| 619 | /* |
| 620 | * pg_table is physical at this point |
| 621 | */ |
| 622 | |
| 623 | pg_table = (pte_t *)pmd_address(*pmd); |
| 624 | if (!pg_table) { |
| 625 | pg_table = (pte_t *) |
| 626 | alloc_bootmem_low_pages_node(NODE_DATA(0),PAGE_SIZE); |
| 627 | pg_table = (pte_t *) __pa(pg_table); |
| 628 | } |
| 629 | |
| 630 | pmd_populate_kernel(NULL, pmd, __va(pg_table)); |
| 631 | |
| 632 | /* now change pg_table to kernel virtual addresses */ |
| 633 | |
| 634 | pg_table = (pte_t *) __va(pg_table) + start_pte; |
| 635 | for (tmp2 = start_pte; tmp2 < PTRS_PER_PTE; tmp2++,pg_table++) { |
| 636 | pte_t pte; |
| 637 | |
| 638 | /* |
| 639 | * Map the fault vector writable so we can |
| 640 | * write the HPMC checksum. |
| 641 | */ |
| 642 | if (address >= ro_start && address < ro_end |
| 643 | && address != fv_addr |
| 644 | && address != gw_addr) |
| 645 | pte = __mk_pte(address, PAGE_KERNEL_RO); |
| 646 | else |
| 647 | pte = __mk_pte(address, pgprot); |
| 648 | |
| 649 | if (address >= end_paddr) |
| 650 | pte_val(pte) = 0; |
| 651 | |
| 652 | set_pte(pg_table, pte); |
| 653 | |
| 654 | address += PAGE_SIZE; |
| 655 | } |
| 656 | start_pte = 0; |
| 657 | |
| 658 | if (address >= end_paddr) |
| 659 | break; |
| 660 | } |
| 661 | start_pmd = 0; |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | /* |
| 666 | * pagetable_init() sets up the page tables |
| 667 | * |
| 668 | * Note that gateway_init() places the Linux gateway page at page 0. |
| 669 | * Since gateway pages cannot be dereferenced this has the desirable |
| 670 | * side effect of trapping those pesky NULL-reference errors in the |
| 671 | * kernel. |
| 672 | */ |
| 673 | static void __init pagetable_init(void) |
| 674 | { |
| 675 | int range; |
| 676 | |
| 677 | /* Map each physical memory range to its kernel vaddr */ |
| 678 | |
| 679 | for (range = 0; range < npmem_ranges; range++) { |
| 680 | unsigned long start_paddr; |
| 681 | unsigned long end_paddr; |
| 682 | unsigned long size; |
| 683 | |
| 684 | start_paddr = pmem_ranges[range].start_pfn << PAGE_SHIFT; |
| 685 | end_paddr = start_paddr + (pmem_ranges[range].pages << PAGE_SHIFT); |
| 686 | size = pmem_ranges[range].pages << PAGE_SHIFT; |
| 687 | |
| 688 | map_pages((unsigned long)__va(start_paddr), start_paddr, |
| 689 | size, PAGE_KERNEL); |
| 690 | } |
| 691 | |
| 692 | #ifdef CONFIG_BLK_DEV_INITRD |
| 693 | if (initrd_end && initrd_end > mem_limit) { |
Helge Deller | 1bcdd85 | 2006-01-13 13:21:06 -0700 | [diff] [blame] | 694 | printk(KERN_INFO "initrd: mapping %08lx-%08lx\n", initrd_start, initrd_end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | map_pages(initrd_start, __pa(initrd_start), |
| 696 | initrd_end - initrd_start, PAGE_KERNEL); |
| 697 | } |
| 698 | #endif |
| 699 | |
| 700 | empty_zero_page = alloc_bootmem_pages(PAGE_SIZE); |
| 701 | memset(empty_zero_page, 0, PAGE_SIZE); |
| 702 | } |
| 703 | |
| 704 | static void __init gateway_init(void) |
| 705 | { |
| 706 | unsigned long linux_gateway_page_addr; |
| 707 | /* FIXME: This is 'const' in order to trick the compiler |
| 708 | into not treating it as DP-relative data. */ |
| 709 | extern void * const linux_gateway_page; |
| 710 | |
| 711 | linux_gateway_page_addr = LINUX_GATEWAY_ADDR & PAGE_MASK; |
| 712 | |
| 713 | /* |
| 714 | * Setup Linux Gateway page. |
| 715 | * |
| 716 | * The Linux gateway page will reside in kernel space (on virtual |
| 717 | * page 0), so it doesn't need to be aliased into user space. |
| 718 | */ |
| 719 | |
| 720 | map_pages(linux_gateway_page_addr, __pa(&linux_gateway_page), |
| 721 | PAGE_SIZE, PAGE_GATEWAY); |
| 722 | } |
| 723 | |
| 724 | #ifdef CONFIG_HPUX |
| 725 | void |
| 726 | map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm) |
| 727 | { |
| 728 | pgd_t *pg_dir; |
| 729 | pmd_t *pmd; |
| 730 | pte_t *pg_table; |
| 731 | unsigned long start_pmd; |
| 732 | unsigned long start_pte; |
| 733 | unsigned long address; |
| 734 | unsigned long hpux_gw_page_addr; |
| 735 | /* FIXME: This is 'const' in order to trick the compiler |
| 736 | into not treating it as DP-relative data. */ |
| 737 | extern void * const hpux_gateway_page; |
| 738 | |
| 739 | hpux_gw_page_addr = HPUX_GATEWAY_ADDR & PAGE_MASK; |
| 740 | |
| 741 | /* |
| 742 | * Setup HP-UX Gateway page. |
| 743 | * |
| 744 | * The HP-UX gateway page resides in the user address space, |
| 745 | * so it needs to be aliased into each process. |
| 746 | */ |
| 747 | |
| 748 | pg_dir = pgd_offset(mm,hpux_gw_page_addr); |
| 749 | |
| 750 | #if PTRS_PER_PMD == 1 |
| 751 | start_pmd = 0; |
| 752 | #else |
| 753 | start_pmd = ((hpux_gw_page_addr >> PMD_SHIFT) & (PTRS_PER_PMD - 1)); |
| 754 | #endif |
| 755 | start_pte = ((hpux_gw_page_addr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)); |
| 756 | |
| 757 | address = __pa(&hpux_gateway_page); |
| 758 | #if PTRS_PER_PMD == 1 |
| 759 | pmd = (pmd_t *)__pa(pg_dir); |
| 760 | #else |
| 761 | pmd = (pmd_t *) pgd_address(*pg_dir); |
| 762 | |
| 763 | /* |
| 764 | * pmd is physical at this point |
| 765 | */ |
| 766 | |
| 767 | if (!pmd) { |
| 768 | pmd = (pmd_t *) get_zeroed_page(GFP_KERNEL); |
| 769 | pmd = (pmd_t *) __pa(pmd); |
| 770 | } |
| 771 | |
| 772 | __pgd_val_set(*pg_dir, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pmd); |
| 773 | #endif |
| 774 | /* now change pmd to kernel virtual addresses */ |
| 775 | |
| 776 | pmd = (pmd_t *)__va(pmd) + start_pmd; |
| 777 | |
| 778 | /* |
| 779 | * pg_table is physical at this point |
| 780 | */ |
| 781 | |
| 782 | pg_table = (pte_t *) pmd_address(*pmd); |
| 783 | if (!pg_table) |
| 784 | pg_table = (pte_t *) __pa(get_zeroed_page(GFP_KERNEL)); |
| 785 | |
| 786 | __pmd_val_set(*pmd, PxD_FLAG_PRESENT | PxD_FLAG_VALID | (unsigned long) pg_table); |
| 787 | |
| 788 | /* now change pg_table to kernel virtual addresses */ |
| 789 | |
| 790 | pg_table = (pte_t *) __va(pg_table) + start_pte; |
| 791 | set_pte(pg_table, __mk_pte(address, PAGE_GATEWAY)); |
| 792 | } |
| 793 | EXPORT_SYMBOL(map_hpux_gateway_page); |
| 794 | #endif |
| 795 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | void __init paging_init(void) |
| 797 | { |
| 798 | int i; |
| 799 | |
| 800 | setup_bootmem(); |
| 801 | pagetable_init(); |
| 802 | gateway_init(); |
| 803 | flush_cache_all_local(); /* start with known state */ |
Matthew Wilcox | ce33941 | 2006-01-10 20:47:49 -0500 | [diff] [blame] | 804 | flush_tlb_all_local(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
| 806 | for (i = 0; i < npmem_ranges; i++) { |
| 807 | unsigned long zones_size[MAX_NR_ZONES] = { 0, 0, 0 }; |
| 808 | |
| 809 | /* We have an IOMMU, so all memory can go into a single |
| 810 | ZONE_DMA zone. */ |
| 811 | zones_size[ZONE_DMA] = pmem_ranges[i].pages; |
| 812 | |
| 813 | #ifdef CONFIG_DISCONTIGMEM |
| 814 | /* Need to initialize the pfnnid_map before we can initialize |
| 815 | the zone */ |
| 816 | { |
| 817 | int j; |
| 818 | for (j = (pmem_ranges[i].start_pfn >> PFNNID_SHIFT); |
| 819 | j <= ((pmem_ranges[i].start_pfn + pmem_ranges[i].pages) >> PFNNID_SHIFT); |
| 820 | j++) { |
| 821 | pfnnid_map[j] = i; |
| 822 | } |
| 823 | } |
| 824 | #endif |
| 825 | |
| 826 | free_area_init_node(i, NODE_DATA(i), zones_size, |
| 827 | pmem_ranges[i].start_pfn, NULL); |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | #ifdef CONFIG_PA20 |
| 832 | |
| 833 | /* |
| 834 | * Currently, all PA20 chips have 18 bit protection id's, which is the |
| 835 | * limiting factor (space ids are 32 bits). |
| 836 | */ |
| 837 | |
| 838 | #define NR_SPACE_IDS 262144 |
| 839 | |
| 840 | #else |
| 841 | |
| 842 | /* |
| 843 | * Currently we have a one-to-one relationship between space id's and |
| 844 | * protection id's. Older parisc chips (PCXS, PCXT, PCXL, PCXL2) only |
| 845 | * support 15 bit protection id's, so that is the limiting factor. |
| 846 | * PCXT' has 18 bit protection id's, but only 16 bit spaceids, so it's |
| 847 | * probably not worth the effort for a special case here. |
| 848 | */ |
| 849 | |
| 850 | #define NR_SPACE_IDS 32768 |
| 851 | |
| 852 | #endif /* !CONFIG_PA20 */ |
| 853 | |
| 854 | #define RECYCLE_THRESHOLD (NR_SPACE_IDS / 2) |
| 855 | #define SID_ARRAY_SIZE (NR_SPACE_IDS / (8 * sizeof(long))) |
| 856 | |
| 857 | static unsigned long space_id[SID_ARRAY_SIZE] = { 1 }; /* disallow space 0 */ |
| 858 | static unsigned long dirty_space_id[SID_ARRAY_SIZE]; |
| 859 | static unsigned long space_id_index; |
| 860 | static unsigned long free_space_ids = NR_SPACE_IDS - 1; |
| 861 | static unsigned long dirty_space_ids = 0; |
| 862 | |
| 863 | static DEFINE_SPINLOCK(sid_lock); |
| 864 | |
| 865 | unsigned long alloc_sid(void) |
| 866 | { |
| 867 | unsigned long index; |
| 868 | |
| 869 | spin_lock(&sid_lock); |
| 870 | |
| 871 | if (free_space_ids == 0) { |
| 872 | if (dirty_space_ids != 0) { |
| 873 | spin_unlock(&sid_lock); |
| 874 | flush_tlb_all(); /* flush_tlb_all() calls recycle_sids() */ |
| 875 | spin_lock(&sid_lock); |
| 876 | } |
| 877 | if (free_space_ids == 0) |
| 878 | BUG(); |
| 879 | } |
| 880 | |
| 881 | free_space_ids--; |
| 882 | |
| 883 | index = find_next_zero_bit(space_id, NR_SPACE_IDS, space_id_index); |
| 884 | space_id[index >> SHIFT_PER_LONG] |= (1L << (index & (BITS_PER_LONG - 1))); |
| 885 | space_id_index = index; |
| 886 | |
| 887 | spin_unlock(&sid_lock); |
| 888 | |
| 889 | return index << SPACEID_SHIFT; |
| 890 | } |
| 891 | |
| 892 | void free_sid(unsigned long spaceid) |
| 893 | { |
| 894 | unsigned long index = spaceid >> SPACEID_SHIFT; |
| 895 | unsigned long *dirty_space_offset; |
| 896 | |
| 897 | dirty_space_offset = dirty_space_id + (index >> SHIFT_PER_LONG); |
| 898 | index &= (BITS_PER_LONG - 1); |
| 899 | |
| 900 | spin_lock(&sid_lock); |
| 901 | |
| 902 | if (*dirty_space_offset & (1L << index)) |
| 903 | BUG(); /* attempt to free space id twice */ |
| 904 | |
| 905 | *dirty_space_offset |= (1L << index); |
| 906 | dirty_space_ids++; |
| 907 | |
| 908 | spin_unlock(&sid_lock); |
| 909 | } |
| 910 | |
| 911 | |
| 912 | #ifdef CONFIG_SMP |
| 913 | static void get_dirty_sids(unsigned long *ndirtyptr,unsigned long *dirty_array) |
| 914 | { |
| 915 | int i; |
| 916 | |
| 917 | /* NOTE: sid_lock must be held upon entry */ |
| 918 | |
| 919 | *ndirtyptr = dirty_space_ids; |
| 920 | if (dirty_space_ids != 0) { |
| 921 | for (i = 0; i < SID_ARRAY_SIZE; i++) { |
| 922 | dirty_array[i] = dirty_space_id[i]; |
| 923 | dirty_space_id[i] = 0; |
| 924 | } |
| 925 | dirty_space_ids = 0; |
| 926 | } |
| 927 | |
| 928 | return; |
| 929 | } |
| 930 | |
| 931 | static void recycle_sids(unsigned long ndirty,unsigned long *dirty_array) |
| 932 | { |
| 933 | int i; |
| 934 | |
| 935 | /* NOTE: sid_lock must be held upon entry */ |
| 936 | |
| 937 | if (ndirty != 0) { |
| 938 | for (i = 0; i < SID_ARRAY_SIZE; i++) { |
| 939 | space_id[i] ^= dirty_array[i]; |
| 940 | } |
| 941 | |
| 942 | free_space_ids += ndirty; |
| 943 | space_id_index = 0; |
| 944 | } |
| 945 | } |
| 946 | |
| 947 | #else /* CONFIG_SMP */ |
| 948 | |
| 949 | static void recycle_sids(void) |
| 950 | { |
| 951 | int i; |
| 952 | |
| 953 | /* NOTE: sid_lock must be held upon entry */ |
| 954 | |
| 955 | if (dirty_space_ids != 0) { |
| 956 | for (i = 0; i < SID_ARRAY_SIZE; i++) { |
| 957 | space_id[i] ^= dirty_space_id[i]; |
| 958 | dirty_space_id[i] = 0; |
| 959 | } |
| 960 | |
| 961 | free_space_ids += dirty_space_ids; |
| 962 | dirty_space_ids = 0; |
| 963 | space_id_index = 0; |
| 964 | } |
| 965 | } |
| 966 | #endif |
| 967 | |
| 968 | /* |
| 969 | * flush_tlb_all() calls recycle_sids(), since whenever the entire tlb is |
| 970 | * purged, we can safely reuse the space ids that were released but |
| 971 | * not flushed from the tlb. |
| 972 | */ |
| 973 | |
| 974 | #ifdef CONFIG_SMP |
| 975 | |
| 976 | static unsigned long recycle_ndirty; |
| 977 | static unsigned long recycle_dirty_array[SID_ARRAY_SIZE]; |
| 978 | static unsigned int recycle_inuse = 0; |
| 979 | |
| 980 | void flush_tlb_all(void) |
| 981 | { |
| 982 | int do_recycle; |
| 983 | |
| 984 | do_recycle = 0; |
| 985 | spin_lock(&sid_lock); |
| 986 | if (dirty_space_ids > RECYCLE_THRESHOLD) { |
| 987 | if (recycle_inuse) { |
| 988 | BUG(); /* FIXME: Use a semaphore/wait queue here */ |
| 989 | } |
| 990 | get_dirty_sids(&recycle_ndirty,recycle_dirty_array); |
| 991 | recycle_inuse++; |
| 992 | do_recycle++; |
| 993 | } |
| 994 | spin_unlock(&sid_lock); |
Matthew Wilcox | ce33941 | 2006-01-10 20:47:49 -0500 | [diff] [blame] | 995 | on_each_cpu(flush_tlb_all_local, NULL, 1, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | if (do_recycle) { |
| 997 | spin_lock(&sid_lock); |
| 998 | recycle_sids(recycle_ndirty,recycle_dirty_array); |
| 999 | recycle_inuse = 0; |
| 1000 | spin_unlock(&sid_lock); |
| 1001 | } |
| 1002 | } |
| 1003 | #else |
| 1004 | void flush_tlb_all(void) |
| 1005 | { |
| 1006 | spin_lock(&sid_lock); |
Matthew Wilcox | 1b2425e | 2006-01-10 20:47:49 -0500 | [diff] [blame] | 1007 | flush_tlb_all_local(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | recycle_sids(); |
| 1009 | spin_unlock(&sid_lock); |
| 1010 | } |
| 1011 | #endif |
| 1012 | |
| 1013 | #ifdef CONFIG_BLK_DEV_INITRD |
| 1014 | void free_initrd_mem(unsigned long start, unsigned long end) |
| 1015 | { |
Helge Deller | 94c3e87 | 2006-03-07 13:34:45 -0700 | [diff] [blame] | 1016 | if (start >= end) |
| 1017 | return; |
| 1018 | printk(KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | for (; start < end; start += PAGE_SIZE) { |
| 1020 | ClearPageReserved(virt_to_page(start)); |
Nick Piggin | 7835e98 | 2006-03-22 00:08:40 -0800 | [diff] [blame] | 1021 | init_page_count(virt_to_page(start)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | free_page(start); |
| 1023 | num_physpages++; |
| 1024 | totalram_pages++; |
| 1025 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | } |
| 1027 | #endif |