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) |
Helge Deller | a8f44e3 | 2007-01-28 14:58:52 +0100 | [diff] [blame] | 9 | * Copyright 2006-2007 Helge Deller (deller@gmx.de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * |
| 11 | */ |
| 12 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/mm.h> |
| 16 | #include <linux/bootmem.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/delay.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/pci.h> /* for hppa_dma_ops and pcxl_dma_ops */ |
| 21 | #include <linux/initrd.h> |
| 22 | #include <linux/swap.h> |
| 23 | #include <linux/unistd.h> |
| 24 | #include <linux/nodemask.h> /* for node_online_map */ |
| 25 | #include <linux/pagemap.h> /* for release_pages and page_cache_release */ |
Helge Deller | d0cf62f | 2015-11-06 23:36:01 +0100 | [diff] [blame] | 26 | #include <linux/compat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
| 28 | #include <asm/pgalloc.h> |
Helge Deller | ce8420b | 2006-10-14 22:10:44 +0200 | [diff] [blame] | 29 | #include <asm/pgtable.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <asm/tlb.h> |
| 31 | #include <asm/pdc_chassis.h> |
| 32 | #include <asm/mmzone.h> |
Heiko Carstens | a581c2a | 2006-07-01 04:36:30 -0700 | [diff] [blame] | 33 | #include <asm/sections.h> |
Helge Deller | d0cf62f | 2015-11-06 23:36:01 +0100 | [diff] [blame] | 34 | #include <asm/msgbuf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | extern int data_start; |
Helge Deller | 161bd3b | 2013-11-30 22:07:51 +0100 | [diff] [blame] | 37 | extern void parisc_kernel_start(void); /* Kernel entry point in head.S */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Kirill A. Shutemov | f24ffde | 2015-04-14 15:45:54 -0700 | [diff] [blame] | 39 | #if CONFIG_PGTABLE_LEVELS == 3 |
Thomas Gleixner | c39f52a | 2012-05-03 09:02:57 +0000 | [diff] [blame] | 40 | /* NOTE: This layout exactly conforms to the hybrid L2/L3 page table layout |
| 41 | * with the first pmd adjacent to the pgd and below it. gcc doesn't actually |
| 42 | * guarantee that global objects will be laid out in memory in the same order |
| 43 | * as the order of declaration, so put these in different sections and use |
| 44 | * the linker script to order them. */ |
| 45 | pmd_t pmd0[PTRS_PER_PMD] __attribute__ ((__section__ (".data..vm0.pmd"), aligned(PAGE_SIZE))); |
| 46 | #endif |
| 47 | |
| 48 | pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__ ((__section__ (".data..vm0.pgd"), aligned(PAGE_SIZE))); |
| 49 | pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __attribute__ ((__section__ (".data..vm0.pte"), aligned(PAGE_SIZE))); |
| 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #ifdef CONFIG_DISCONTIGMEM |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 52 | struct node_map_data node_data[MAX_NUMNODES] __read_mostly; |
Helge Deller | 91ea820 | 2013-06-05 20:50:01 +0000 | [diff] [blame] | 53 | signed char pfnnid_map[PFNNID_MAP_MAX] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #endif |
| 55 | |
| 56 | static struct resource data_resource = { |
| 57 | .name = "Kernel data", |
Toshi Kani | 35d98e9 | 2016-01-26 21:57:22 +0100 | [diff] [blame] | 58 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | }; |
| 60 | |
| 61 | static struct resource code_resource = { |
| 62 | .name = "Kernel code", |
Toshi Kani | 35d98e9 | 2016-01-26 21:57:22 +0100 | [diff] [blame] | 63 | .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | }; |
| 65 | |
| 66 | static struct resource pdcdata_resource = { |
| 67 | .name = "PDC data (Page Zero)", |
| 68 | .start = 0, |
| 69 | .end = 0x9ff, |
| 70 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 71 | }; |
| 72 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 73 | static struct resource sysram_resources[MAX_PHYSMEM_RANGES] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | /* The following array is initialized from the firmware specific |
| 76 | * information retrieved in kernel/inventory.c. |
| 77 | */ |
| 78 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 79 | physmem_range_t pmem_ranges[MAX_PHYSMEM_RANGES] __read_mostly; |
| 80 | int npmem_ranges __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Helge Deller | a8f44e3 | 2007-01-28 14:58:52 +0100 | [diff] [blame] | 82 | #ifdef CONFIG_64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #define MAX_MEM (~0UL) |
Helge Deller | a8f44e3 | 2007-01-28 14:58:52 +0100 | [diff] [blame] | 84 | #else /* !CONFIG_64BIT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | #define MAX_MEM (3584U*1024U*1024U) |
Helge Deller | a8f44e3 | 2007-01-28 14:58:52 +0100 | [diff] [blame] | 86 | #endif /* !CONFIG_64BIT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 88 | static unsigned long mem_limit __read_mostly = MAX_MEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | static void __init mem_limit_func(void) |
| 91 | { |
| 92 | char *cp, *end; |
| 93 | unsigned long limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
| 95 | /* We need this before __setup() functions are called */ |
| 96 | |
| 97 | limit = MAX_MEM; |
Alon Bar-Lev | 668f993 | 2007-02-12 00:54:16 -0800 | [diff] [blame] | 98 | for (cp = boot_command_line; *cp; ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | if (memcmp(cp, "mem=", 4) == 0) { |
| 100 | cp += 4; |
| 101 | limit = memparse(cp, &end); |
| 102 | if (end != cp) |
| 103 | break; |
| 104 | cp = end; |
| 105 | } else { |
| 106 | while (*cp != ' ' && *cp) |
| 107 | ++cp; |
| 108 | while (*cp == ' ') |
| 109 | ++cp; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | if (limit < mem_limit) |
| 114 | mem_limit = limit; |
| 115 | } |
| 116 | |
| 117 | #define MAX_GAP (0x40000000UL >> PAGE_SHIFT) |
| 118 | |
| 119 | static void __init setup_bootmem(void) |
| 120 | { |
| 121 | unsigned long bootmap_size; |
| 122 | unsigned long mem_max; |
| 123 | unsigned long bootmap_pages; |
| 124 | unsigned long bootmap_start_pfn; |
| 125 | unsigned long bootmap_pfn; |
| 126 | #ifndef CONFIG_DISCONTIGMEM |
| 127 | physmem_range_t pmem_holes[MAX_PHYSMEM_RANGES - 1]; |
| 128 | int npmem_holes; |
| 129 | #endif |
| 130 | int i, sysram_resource_count; |
| 131 | |
| 132 | disable_sr_hashing(); /* Turn off space register hashing */ |
| 133 | |
| 134 | /* |
| 135 | * Sort the ranges. Since the number of ranges is typically |
| 136 | * small, and performance is not an issue here, just do |
| 137 | * a simple insertion sort. |
| 138 | */ |
| 139 | |
| 140 | for (i = 1; i < npmem_ranges; i++) { |
| 141 | int j; |
| 142 | |
| 143 | for (j = i; j > 0; j--) { |
| 144 | unsigned long tmp; |
| 145 | |
| 146 | if (pmem_ranges[j-1].start_pfn < |
| 147 | pmem_ranges[j].start_pfn) { |
| 148 | |
| 149 | break; |
| 150 | } |
| 151 | tmp = pmem_ranges[j-1].start_pfn; |
| 152 | pmem_ranges[j-1].start_pfn = pmem_ranges[j].start_pfn; |
| 153 | pmem_ranges[j].start_pfn = tmp; |
| 154 | tmp = pmem_ranges[j-1].pages; |
| 155 | pmem_ranges[j-1].pages = pmem_ranges[j].pages; |
| 156 | pmem_ranges[j].pages = tmp; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | #ifndef CONFIG_DISCONTIGMEM |
| 161 | /* |
| 162 | * Throw out ranges that are too far apart (controlled by |
| 163 | * MAX_GAP). |
| 164 | */ |
| 165 | |
| 166 | for (i = 1; i < npmem_ranges; i++) { |
| 167 | if (pmem_ranges[i].start_pfn - |
| 168 | (pmem_ranges[i-1].start_pfn + |
| 169 | pmem_ranges[i-1].pages) > MAX_GAP) { |
| 170 | npmem_ranges = i; |
| 171 | printk("Large gap in memory detected (%ld pages). " |
| 172 | "Consider turning on CONFIG_DISCONTIGMEM\n", |
| 173 | pmem_ranges[i].start_pfn - |
| 174 | (pmem_ranges[i-1].start_pfn + |
| 175 | pmem_ranges[i-1].pages)); |
| 176 | break; |
| 177 | } |
| 178 | } |
| 179 | #endif |
| 180 | |
| 181 | if (npmem_ranges > 1) { |
| 182 | |
| 183 | /* Print the memory ranges */ |
| 184 | |
| 185 | printk(KERN_INFO "Memory Ranges:\n"); |
| 186 | |
| 187 | for (i = 0; i < npmem_ranges; i++) { |
| 188 | unsigned long start; |
| 189 | unsigned long size; |
| 190 | |
| 191 | size = (pmem_ranges[i].pages << PAGE_SHIFT); |
| 192 | start = (pmem_ranges[i].start_pfn << PAGE_SHIFT); |
| 193 | printk(KERN_INFO "%2d) Start 0x%016lx End 0x%016lx Size %6ld MB\n", |
| 194 | i,start, start + (size - 1), size >> 20); |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | sysram_resource_count = npmem_ranges; |
| 199 | for (i = 0; i < sysram_resource_count; i++) { |
| 200 | struct resource *res = &sysram_resources[i]; |
| 201 | res->name = "System RAM"; |
| 202 | res->start = pmem_ranges[i].start_pfn << PAGE_SHIFT; |
| 203 | res->end = res->start + (pmem_ranges[i].pages << PAGE_SHIFT)-1; |
Toshi Kani | 35d98e9 | 2016-01-26 21:57:22 +0100 | [diff] [blame] | 204 | res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | request_resource(&iomem_resource, res); |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * For 32 bit kernels we limit the amount of memory we can |
| 210 | * support, in order to preserve enough kernel address space |
| 211 | * for other purposes. For 64 bit kernels we don't normally |
| 212 | * limit the memory, but this mechanism can be used to |
| 213 | * artificially limit the amount of memory (and it is written |
| 214 | * to work with multiple memory ranges). |
| 215 | */ |
| 216 | |
| 217 | mem_limit_func(); /* check for "mem=" argument */ |
| 218 | |
| 219 | mem_max = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | for (i = 0; i < npmem_ranges; i++) { |
| 221 | unsigned long rsize; |
| 222 | |
| 223 | rsize = pmem_ranges[i].pages << PAGE_SHIFT; |
| 224 | if ((mem_max + rsize) > mem_limit) { |
| 225 | printk(KERN_WARNING "Memory truncated to %ld MB\n", mem_limit >> 20); |
| 226 | if (mem_max == mem_limit) |
| 227 | npmem_ranges = i; |
| 228 | else { |
| 229 | pmem_ranges[i].pages = (mem_limit >> PAGE_SHIFT) |
| 230 | - (mem_max >> PAGE_SHIFT); |
| 231 | npmem_ranges = i + 1; |
| 232 | mem_max = mem_limit; |
| 233 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | break; |
| 235 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | mem_max += rsize; |
| 237 | } |
| 238 | |
| 239 | printk(KERN_INFO "Total Memory: %ld MB\n",mem_max >> 20); |
| 240 | |
| 241 | #ifndef CONFIG_DISCONTIGMEM |
| 242 | /* Merge the ranges, keeping track of the holes */ |
| 243 | |
| 244 | { |
| 245 | unsigned long end_pfn; |
| 246 | unsigned long hole_pages; |
| 247 | |
| 248 | npmem_holes = 0; |
| 249 | end_pfn = pmem_ranges[0].start_pfn + pmem_ranges[0].pages; |
| 250 | for (i = 1; i < npmem_ranges; i++) { |
| 251 | |
| 252 | hole_pages = pmem_ranges[i].start_pfn - end_pfn; |
| 253 | if (hole_pages) { |
| 254 | pmem_holes[npmem_holes].start_pfn = end_pfn; |
| 255 | pmem_holes[npmem_holes++].pages = hole_pages; |
| 256 | end_pfn += hole_pages; |
| 257 | } |
| 258 | end_pfn += pmem_ranges[i].pages; |
| 259 | } |
| 260 | |
| 261 | pmem_ranges[0].pages = end_pfn - pmem_ranges[0].start_pfn; |
| 262 | npmem_ranges = 1; |
| 263 | } |
| 264 | #endif |
| 265 | |
| 266 | bootmap_pages = 0; |
| 267 | for (i = 0; i < npmem_ranges; i++) |
| 268 | bootmap_pages += bootmem_bootmap_pages(pmem_ranges[i].pages); |
| 269 | |
| 270 | bootmap_start_pfn = PAGE_ALIGN(__pa((unsigned long) &_end)) >> PAGE_SHIFT; |
| 271 | |
| 272 | #ifdef CONFIG_DISCONTIGMEM |
| 273 | for (i = 0; i < MAX_PHYSMEM_RANGES; i++) { |
| 274 | memset(NODE_DATA(i), 0, sizeof(pg_data_t)); |
Johannes Weiner | b61bfa3 | 2008-07-23 21:26:55 -0700 | [diff] [blame] | 275 | NODE_DATA(i)->bdata = &bootmem_node_data[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | memset(pfnnid_map, 0xff, sizeof(pfnnid_map)); |
| 278 | |
David Rientjes | d9b41e0 | 2011-04-20 19:27:13 -0700 | [diff] [blame] | 279 | for (i = 0; i < npmem_ranges; i++) { |
| 280 | node_set_state(i, N_NORMAL_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | node_set_online(i); |
David Rientjes | d9b41e0 | 2011-04-20 19:27:13 -0700 | [diff] [blame] | 282 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | #endif |
| 284 | |
| 285 | /* |
| 286 | * Initialize and free the full range of memory in each range. |
| 287 | * Note that the only writing these routines do are to the bootmap, |
| 288 | * and we've made sure to locate the bootmap properly so that they |
| 289 | * won't be writing over anything important. |
| 290 | */ |
| 291 | |
| 292 | bootmap_pfn = bootmap_start_pfn; |
| 293 | max_pfn = 0; |
| 294 | for (i = 0; i < npmem_ranges; i++) { |
| 295 | unsigned long start_pfn; |
| 296 | unsigned long npages; |
| 297 | |
| 298 | start_pfn = pmem_ranges[i].start_pfn; |
| 299 | npages = pmem_ranges[i].pages; |
| 300 | |
| 301 | bootmap_size = init_bootmem_node(NODE_DATA(i), |
| 302 | bootmap_pfn, |
| 303 | start_pfn, |
| 304 | (start_pfn + npages) ); |
| 305 | free_bootmem_node(NODE_DATA(i), |
| 306 | (start_pfn << PAGE_SHIFT), |
| 307 | (npages << PAGE_SHIFT) ); |
| 308 | bootmap_pfn += (bootmap_size + PAGE_SIZE - 1) >> PAGE_SHIFT; |
| 309 | if ((start_pfn + npages) > max_pfn) |
| 310 | max_pfn = start_pfn + npages; |
| 311 | } |
| 312 | |
Grant Grundler | 5cdb820 | 2006-01-10 20:47:57 -0500 | [diff] [blame] | 313 | /* IOMMU is always used to access "high mem" on those boxes |
| 314 | * that can support enough mem that a PCI device couldn't |
| 315 | * directly DMA to any physical addresses. |
| 316 | * ISA DMA support will need to revisit this. |
| 317 | */ |
| 318 | max_low_pfn = max_pfn; |
| 319 | |
Helge Deller | 8980a7b | 2009-01-06 12:57:01 +0100 | [diff] [blame] | 320 | /* bootmap sizing messed up? */ |
| 321 | BUG_ON((bootmap_pfn - bootmap_start_pfn) != bootmap_pages); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | /* reserve PAGE0 pdc memory, kernel text/data/bss & bootmap */ |
| 324 | |
| 325 | #define PDC_CONSOLE_IO_IODC_SIZE 32768 |
| 326 | |
| 327 | reserve_bootmem_node(NODE_DATA(0), 0UL, |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 328 | (unsigned long)(PAGE0->mem_free + |
| 329 | PDC_CONSOLE_IO_IODC_SIZE), BOOTMEM_DEFAULT); |
Helge Deller | 161bd3b | 2013-11-30 22:07:51 +0100 | [diff] [blame] | 330 | reserve_bootmem_node(NODE_DATA(0), __pa(KERNEL_BINARY_TEXT_START), |
| 331 | (unsigned long)(_end - KERNEL_BINARY_TEXT_START), |
| 332 | BOOTMEM_DEFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | reserve_bootmem_node(NODE_DATA(0), (bootmap_start_pfn << PAGE_SHIFT), |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 334 | ((bootmap_pfn - bootmap_start_pfn) << PAGE_SHIFT), |
| 335 | BOOTMEM_DEFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
| 337 | #ifndef CONFIG_DISCONTIGMEM |
| 338 | |
| 339 | /* reserve the holes */ |
| 340 | |
| 341 | for (i = 0; i < npmem_holes; i++) { |
| 342 | reserve_bootmem_node(NODE_DATA(0), |
| 343 | (pmem_holes[i].start_pfn << PAGE_SHIFT), |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 344 | (pmem_holes[i].pages << PAGE_SHIFT), |
| 345 | BOOTMEM_DEFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
| 347 | #endif |
| 348 | |
| 349 | #ifdef CONFIG_BLK_DEV_INITRD |
| 350 | if (initrd_start) { |
| 351 | printk(KERN_INFO "initrd: %08lx-%08lx\n", initrd_start, initrd_end); |
| 352 | if (__pa(initrd_start) < mem_max) { |
| 353 | unsigned long initrd_reserve; |
| 354 | |
| 355 | if (__pa(initrd_end) > mem_max) { |
| 356 | initrd_reserve = mem_max - __pa(initrd_start); |
| 357 | } else { |
| 358 | initrd_reserve = initrd_end - initrd_start; |
| 359 | } |
| 360 | initrd_below_start_ok = 1; |
| 361 | printk(KERN_INFO "initrd: reserving %08lx-%08lx (mem_max %08lx)\n", __pa(initrd_start), __pa(initrd_start) + initrd_reserve, mem_max); |
| 362 | |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 363 | reserve_bootmem_node(NODE_DATA(0), __pa(initrd_start), |
| 364 | initrd_reserve, BOOTMEM_DEFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | } |
| 367 | #endif |
| 368 | |
| 369 | data_resource.start = virt_to_phys(&data_start); |
Kyle McMartin | c51d476 | 2006-08-13 20:39:48 -0400 | [diff] [blame] | 370 | data_resource.end = virt_to_phys(_end) - 1; |
| 371 | code_resource.start = virt_to_phys(_text); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | code_resource.end = virt_to_phys(&data_start)-1; |
| 373 | |
| 374 | /* We don't know which region the kernel will be in, so try |
| 375 | * all of them. |
| 376 | */ |
| 377 | for (i = 0; i < sysram_resource_count; i++) { |
| 378 | struct resource *res = &sysram_resources[i]; |
| 379 | request_resource(res, &code_resource); |
| 380 | request_resource(res, &data_resource); |
| 381 | } |
| 382 | request_resource(&sysram_resources[0], &pdcdata_resource); |
| 383 | } |
| 384 | |
Helge Deller | 161bd3b | 2013-11-30 22:07:51 +0100 | [diff] [blame] | 385 | static int __init parisc_text_address(unsigned long vaddr) |
| 386 | { |
| 387 | static unsigned long head_ptr __initdata; |
| 388 | |
| 389 | if (!head_ptr) |
| 390 | head_ptr = PAGE_MASK & (unsigned long) |
| 391 | dereference_function_descriptor(&parisc_kernel_start); |
| 392 | |
| 393 | return core_kernel_text(vaddr) || vaddr == head_ptr; |
| 394 | } |
| 395 | |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 396 | static void __init map_pages(unsigned long start_vaddr, |
| 397 | unsigned long start_paddr, unsigned long size, |
| 398 | pgprot_t pgprot, int force) |
| 399 | { |
| 400 | pgd_t *pg_dir; |
| 401 | pmd_t *pmd; |
| 402 | pte_t *pg_table; |
| 403 | unsigned long end_paddr; |
| 404 | unsigned long start_pmd; |
| 405 | unsigned long start_pte; |
| 406 | unsigned long tmp1; |
| 407 | unsigned long tmp2; |
| 408 | unsigned long address; |
| 409 | unsigned long vaddr; |
| 410 | unsigned long ro_start; |
| 411 | unsigned long ro_end; |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 412 | unsigned long kernel_end; |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 413 | |
| 414 | ro_start = __pa((unsigned long)_text); |
| 415 | ro_end = __pa((unsigned long)&data_start); |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 416 | kernel_end = __pa((unsigned long)&_end); |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 417 | |
| 418 | end_paddr = start_paddr + size; |
| 419 | |
| 420 | pg_dir = pgd_offset_k(start_vaddr); |
| 421 | |
| 422 | #if PTRS_PER_PMD == 1 |
| 423 | start_pmd = 0; |
| 424 | #else |
| 425 | start_pmd = ((start_vaddr >> PMD_SHIFT) & (PTRS_PER_PMD - 1)); |
| 426 | #endif |
| 427 | start_pte = ((start_vaddr >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)); |
| 428 | |
| 429 | address = start_paddr; |
| 430 | vaddr = start_vaddr; |
| 431 | while (address < end_paddr) { |
| 432 | #if PTRS_PER_PMD == 1 |
| 433 | pmd = (pmd_t *)__pa(pg_dir); |
| 434 | #else |
| 435 | pmd = (pmd_t *)pgd_address(*pg_dir); |
| 436 | |
| 437 | /* |
| 438 | * pmd is physical at this point |
| 439 | */ |
| 440 | |
| 441 | if (!pmd) { |
| 442 | pmd = (pmd_t *) alloc_bootmem_low_pages_node(NODE_DATA(0), PAGE_SIZE << PMD_ORDER); |
| 443 | pmd = (pmd_t *) __pa(pmd); |
| 444 | } |
| 445 | |
| 446 | pgd_populate(NULL, pg_dir, __va(pmd)); |
| 447 | #endif |
| 448 | pg_dir++; |
| 449 | |
| 450 | /* now change pmd to kernel virtual addresses */ |
| 451 | |
| 452 | pmd = (pmd_t *)__va(pmd) + start_pmd; |
| 453 | for (tmp1 = start_pmd; tmp1 < PTRS_PER_PMD; tmp1++, pmd++) { |
| 454 | |
| 455 | /* |
| 456 | * pg_table is physical at this point |
| 457 | */ |
| 458 | |
| 459 | pg_table = (pte_t *)pmd_address(*pmd); |
| 460 | if (!pg_table) { |
| 461 | pg_table = (pte_t *) |
| 462 | alloc_bootmem_low_pages_node(NODE_DATA(0), PAGE_SIZE); |
| 463 | pg_table = (pte_t *) __pa(pg_table); |
| 464 | } |
| 465 | |
| 466 | pmd_populate_kernel(NULL, pmd, __va(pg_table)); |
| 467 | |
| 468 | /* now change pg_table to kernel virtual addresses */ |
| 469 | |
| 470 | pg_table = (pte_t *) __va(pg_table) + start_pte; |
| 471 | for (tmp2 = start_pte; tmp2 < PTRS_PER_PTE; tmp2++, pg_table++) { |
| 472 | pte_t pte; |
| 473 | |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 474 | if (force) |
| 475 | pte = __mk_pte(address, pgprot); |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 476 | else if (parisc_text_address(vaddr)) { |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 477 | pte = __mk_pte(address, PAGE_KERNEL_EXEC); |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 478 | if (address >= ro_start && address < kernel_end) |
| 479 | pte = pte_mkhuge(pte); |
| 480 | } |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 481 | else |
| 482 | #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 483 | if (address >= ro_start && address < ro_end) { |
| 484 | pte = __mk_pte(address, PAGE_KERNEL_EXEC); |
| 485 | pte = pte_mkhuge(pte); |
| 486 | } else |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 487 | #endif |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 488 | { |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 489 | pte = __mk_pte(address, pgprot); |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 490 | if (address >= ro_start && address < kernel_end) |
| 491 | pte = pte_mkhuge(pte); |
| 492 | } |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 493 | |
| 494 | if (address >= end_paddr) { |
| 495 | if (force) |
| 496 | break; |
| 497 | else |
| 498 | pte_val(pte) = 0; |
| 499 | } |
| 500 | |
| 501 | set_pte(pg_table, pte); |
| 502 | |
| 503 | address += PAGE_SIZE; |
| 504 | vaddr += PAGE_SIZE; |
| 505 | } |
| 506 | start_pte = 0; |
| 507 | |
| 508 | if (address >= end_paddr) |
| 509 | break; |
| 510 | } |
| 511 | start_pmd = 0; |
| 512 | } |
| 513 | } |
| 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | void free_initmem(void) |
| 516 | { |
Kyle McMartin | 4fb1178 | 2009-04-05 02:53:47 +0000 | [diff] [blame] | 517 | unsigned long init_begin = (unsigned long)__init_begin; |
| 518 | unsigned long init_end = (unsigned long)__init_end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 520 | /* The init text pages are marked R-X. We have to |
| 521 | * flush the icache and mark them RW- |
| 522 | * |
| 523 | * This is tricky, because map_pages is in the init section. |
| 524 | * Do a dummy remap of the data section first (the data |
| 525 | * section is already PAGE_KERNEL) to pull in the TLB entries |
| 526 | * for map_kernel */ |
| 527 | map_pages(init_begin, __pa(init_begin), init_end - init_begin, |
| 528 | PAGE_KERNEL_RWX, 1); |
| 529 | /* now remap at PAGE_KERNEL since the TLB is pre-primed to execute |
| 530 | * map_pages */ |
| 531 | map_pages(init_begin, __pa(init_begin), init_end - init_begin, |
| 532 | PAGE_KERNEL, 1); |
| 533 | |
| 534 | /* force the kernel to see the new TLB entries */ |
| 535 | __flush_tlb_range(0, init_begin, init_end); |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 536 | |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 537 | /* finally dump all the instructions which were cached, since the |
| 538 | * pages are no-longer executable */ |
Kyle McMartin | 4fb1178 | 2009-04-05 02:53:47 +0000 | [diff] [blame] | 539 | flush_icache_range(init_begin, init_end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 541 | free_initmem_default(POISON_FREE_INITMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | /* set up a new led state on systems shipped LED State panel */ |
| 544 | pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | } |
| 546 | |
Helge Deller | 1bcdd85 | 2006-01-13 13:21:06 -0700 | [diff] [blame] | 547 | |
| 548 | #ifdef CONFIG_DEBUG_RODATA |
| 549 | void mark_rodata_ro(void) |
| 550 | { |
Helge Deller | 1bcdd85 | 2006-01-13 13:21:06 -0700 | [diff] [blame] | 551 | /* rodata memory was already mapped with KERNEL_RO access rights by |
| 552 | pagetable_init() and map_pages(). No need to do additional stuff here */ |
| 553 | printk (KERN_INFO "Write protecting the kernel read-only data: %luk\n", |
Heiko Carstens | a581c2a | 2006-07-01 04:36:30 -0700 | [diff] [blame] | 554 | (unsigned long)(__end_rodata - __start_rodata) >> 10); |
Helge Deller | 1bcdd85 | 2006-01-13 13:21:06 -0700 | [diff] [blame] | 555 | } |
| 556 | #endif |
| 557 | |
| 558 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | /* |
| 560 | * Just an arbitrary offset to serve as a "hole" between mapping areas |
| 561 | * (between top of physical memory and a potential pcxl dma mapping |
| 562 | * area, and below the vmalloc mapping area). |
| 563 | * |
| 564 | * The current 32K value just means that there will be a 32K "hole" |
| 565 | * between mapping areas. That means that any out-of-bounds memory |
| 566 | * accesses will hopefully be caught. The vmalloc() routines leaves |
| 567 | * a hole of 4kB between each vmalloced area for the same reason. |
| 568 | */ |
| 569 | |
| 570 | /* Leave room for gateway page expansion */ |
| 571 | #if KERNEL_MAP_START < GATEWAY_PAGE_SIZE |
| 572 | #error KERNEL_MAP_START is in gateway reserved region |
| 573 | #endif |
| 574 | #define MAP_START (KERNEL_MAP_START) |
| 575 | |
| 576 | #define VM_MAP_OFFSET (32*1024) |
| 577 | #define SET_MAP_OFFSET(x) ((void *)(((unsigned long)(x) + VM_MAP_OFFSET) \ |
| 578 | & ~(VM_MAP_OFFSET-1))) |
| 579 | |
Helge Deller | 4255f0d | 2009-09-27 23:26:01 -0400 | [diff] [blame] | 580 | void *parisc_vmalloc_start __read_mostly; |
| 581 | EXPORT_SYMBOL(parisc_vmalloc_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
| 583 | #ifdef CONFIG_PA11 |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 584 | unsigned long pcxl_dma_start __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | #endif |
| 586 | |
| 587 | void __init mem_init(void) |
| 588 | { |
Helge Deller | d0cf62f | 2015-11-06 23:36:01 +0100 | [diff] [blame] | 589 | /* Do sanity checks on IPC (compat) structures */ |
| 590 | BUILD_BUG_ON(sizeof(struct ipc64_perm) != 48); |
| 591 | #ifndef CONFIG_64BIT |
| 592 | BUILD_BUG_ON(sizeof(struct semid64_ds) != 80); |
| 593 | BUILD_BUG_ON(sizeof(struct msqid64_ds) != 104); |
| 594 | BUILD_BUG_ON(sizeof(struct shmid64_ds) != 104); |
| 595 | #endif |
| 596 | #ifdef CONFIG_COMPAT |
| 597 | BUILD_BUG_ON(sizeof(struct compat_ipc64_perm) != sizeof(struct ipc64_perm)); |
| 598 | BUILD_BUG_ON(sizeof(struct compat_semid64_ds) != 80); |
| 599 | BUILD_BUG_ON(sizeof(struct compat_msqid64_ds) != 104); |
| 600 | BUILD_BUG_ON(sizeof(struct compat_shmid64_ds) != 104); |
| 601 | #endif |
| 602 | |
Helge Deller | 48d27cb | 2009-01-18 19:16:16 +0100 | [diff] [blame] | 603 | /* Do sanity checks on page table constants */ |
| 604 | BUILD_BUG_ON(PTE_ENTRY_SIZE != sizeof(pte_t)); |
| 605 | BUILD_BUG_ON(PMD_ENTRY_SIZE != sizeof(pmd_t)); |
| 606 | BUILD_BUG_ON(PGD_ENTRY_SIZE != sizeof(pgd_t)); |
| 607 | BUILD_BUG_ON(PAGE_SHIFT + BITS_PER_PTE + BITS_PER_PMD + BITS_PER_PGD |
| 608 | > BITS_PER_LONG); |
| 609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | high_memory = __va((max_pfn << PAGE_SHIFT)); |
Jiang Liu | d5c017d | 2013-07-03 15:04:31 -0700 | [diff] [blame] | 611 | set_max_mapnr(page_to_pfn(virt_to_page(high_memory - 1)) + 1); |
Jiang Liu | 0c98853 | 2013-07-03 15:03:24 -0700 | [diff] [blame] | 612 | free_all_bootmem(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | #ifdef CONFIG_PA11 |
| 615 | if (hppa_dma_ops == &pcxl_dma_ops) { |
| 616 | pcxl_dma_start = (unsigned long)SET_MAP_OFFSET(MAP_START); |
Helge Deller | 4255f0d | 2009-09-27 23:26:01 -0400 | [diff] [blame] | 617 | parisc_vmalloc_start = SET_MAP_OFFSET(pcxl_dma_start |
| 618 | + PCXL_DMA_MAP_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | } else { |
| 620 | pcxl_dma_start = 0; |
Helge Deller | 4255f0d | 2009-09-27 23:26:01 -0400 | [diff] [blame] | 621 | parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
| 623 | #else |
Helge Deller | 4255f0d | 2009-09-27 23:26:01 -0400 | [diff] [blame] | 624 | parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | #endif |
| 626 | |
Jiang Liu | 7d2c774 | 2013-07-03 15:04:07 -0700 | [diff] [blame] | 627 | mem_init_print_info(NULL); |
Helge Deller | ce8420b | 2006-10-14 22:10:44 +0200 | [diff] [blame] | 628 | #ifdef CONFIG_DEBUG_KERNEL /* double-sanity-check paranoia */ |
| 629 | printk("virtual kernel memory layout:\n" |
| 630 | " vmalloc : 0x%p - 0x%p (%4ld MB)\n" |
Kyle McMartin | 53faf29 | 2006-10-16 20:34:00 -0400 | [diff] [blame] | 631 | " memory : 0x%p - 0x%p (%4ld MB)\n" |
Helge Deller | ce8420b | 2006-10-14 22:10:44 +0200 | [diff] [blame] | 632 | " .init : 0x%p - 0x%p (%4ld kB)\n" |
| 633 | " .data : 0x%p - 0x%p (%4ld kB)\n" |
| 634 | " .text : 0x%p - 0x%p (%4ld kB)\n", |
| 635 | |
| 636 | (void*)VMALLOC_START, (void*)VMALLOC_END, |
| 637 | (VMALLOC_END - VMALLOC_START) >> 20, |
| 638 | |
| 639 | __va(0), high_memory, |
| 640 | ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20, |
| 641 | |
Kyle McMartin | 53faf29 | 2006-10-16 20:34:00 -0400 | [diff] [blame] | 642 | __init_begin, __init_end, |
| 643 | ((unsigned long)__init_end - (unsigned long)__init_begin) >> 10, |
Helge Deller | ce8420b | 2006-10-14 22:10:44 +0200 | [diff] [blame] | 644 | |
Kyle McMartin | 53faf29 | 2006-10-16 20:34:00 -0400 | [diff] [blame] | 645 | _etext, _edata, |
| 646 | ((unsigned long)_edata - (unsigned long)_etext) >> 10, |
Helge Deller | ce8420b | 2006-10-14 22:10:44 +0200 | [diff] [blame] | 647 | |
Kyle McMartin | 53faf29 | 2006-10-16 20:34:00 -0400 | [diff] [blame] | 648 | _text, _etext, |
| 649 | ((unsigned long)_etext - (unsigned long)_text) >> 10); |
Helge Deller | ce8420b | 2006-10-14 22:10:44 +0200 | [diff] [blame] | 650 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | } |
| 652 | |
Helge Deller | 8039de1 | 2006-01-10 20:35:03 -0500 | [diff] [blame] | 653 | unsigned long *empty_zero_page __read_mostly; |
Kyle McMartin | 22febf1 | 2008-05-26 01:54:35 -0400 | [diff] [blame] | 654 | EXPORT_SYMBOL(empty_zero_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
David Rientjes | b2b755b | 2011-03-24 15:18:15 -0700 | [diff] [blame] | 656 | void show_mem(unsigned int filter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | { |
Mel Gorman | aec6a88 | 2014-01-21 15:49:13 -0800 | [diff] [blame] | 658 | int total = 0,reserved = 0; |
| 659 | pg_data_t *pgdat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
| 661 | printk(KERN_INFO "Mem-info:\n"); |
David Rientjes | 7bf02ea | 2011-05-24 17:11:16 -0700 | [diff] [blame] | 662 | show_free_areas(filter); |
Mel Gorman | aec6a88 | 2014-01-21 15:49:13 -0800 | [diff] [blame] | 663 | |
| 664 | for_each_online_pgdat(pgdat) { |
| 665 | unsigned long flags; |
| 666 | int zoneid; |
| 667 | |
| 668 | pgdat_resize_lock(pgdat, &flags); |
| 669 | for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) { |
| 670 | struct zone *zone = &pgdat->node_zones[zoneid]; |
| 671 | if (!populated_zone(zone)) |
| 672 | continue; |
| 673 | |
| 674 | total += zone->present_pages; |
| 675 | reserved = zone->present_pages - zone->managed_pages; |
| 676 | } |
| 677 | pgdat_resize_unlock(pgdat, &flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | printk(KERN_INFO "%d pages of RAM\n", total); |
| 681 | printk(KERN_INFO "%d reserved pages\n", reserved); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | |
| 683 | #ifdef CONFIG_DISCONTIGMEM |
| 684 | { |
| 685 | struct zonelist *zl; |
Mel Gorman | 54a6eb5 | 2008-04-28 02:12:16 -0700 | [diff] [blame] | 686 | int i, j; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
| 688 | for (i = 0; i < npmem_ranges; i++) { |
Mel Gorman | 4413a0f | 2008-05-12 14:02:19 -0700 | [diff] [blame] | 689 | zl = node_zonelist(i, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | for (j = 0; j < MAX_NR_ZONES; j++) { |
Mel Gorman | dd1a239 | 2008-04-28 02:12:17 -0700 | [diff] [blame] | 691 | struct zoneref *z; |
Mel Gorman | 54a6eb5 | 2008-04-28 02:12:16 -0700 | [diff] [blame] | 692 | struct zone *zone; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
| 694 | printk("Zone list for zone %d on node %d: ", j, i); |
Mel Gorman | 54a6eb5 | 2008-04-28 02:12:16 -0700 | [diff] [blame] | 695 | for_each_zone_zonelist(zone, z, zl, j) |
| 696 | printk("[%d/%s] ", zone_to_nid(zone), |
| 697 | zone->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | printk("\n"); |
| 699 | } |
| 700 | } |
| 701 | } |
| 702 | #endif |
| 703 | } |
| 704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | /* |
| 706 | * pagetable_init() sets up the page tables |
| 707 | * |
| 708 | * Note that gateway_init() places the Linux gateway page at page 0. |
| 709 | * Since gateway pages cannot be dereferenced this has the desirable |
| 710 | * side effect of trapping those pesky NULL-reference errors in the |
| 711 | * kernel. |
| 712 | */ |
| 713 | static void __init pagetable_init(void) |
| 714 | { |
| 715 | int range; |
| 716 | |
| 717 | /* Map each physical memory range to its kernel vaddr */ |
| 718 | |
| 719 | for (range = 0; range < npmem_ranges; range++) { |
| 720 | unsigned long start_paddr; |
| 721 | unsigned long end_paddr; |
| 722 | unsigned long size; |
| 723 | |
| 724 | start_paddr = pmem_ranges[range].start_pfn << PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | size = pmem_ranges[range].pages << PAGE_SHIFT; |
Helge Deller | 41b85a1 | 2015-11-22 00:07:44 +0100 | [diff] [blame] | 726 | end_paddr = start_paddr + size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
| 728 | map_pages((unsigned long)__va(start_paddr), start_paddr, |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 729 | size, PAGE_KERNEL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } |
| 731 | |
| 732 | #ifdef CONFIG_BLK_DEV_INITRD |
| 733 | if (initrd_end && initrd_end > mem_limit) { |
Helge Deller | 1bcdd85 | 2006-01-13 13:21:06 -0700 | [diff] [blame] | 734 | printk(KERN_INFO "initrd: mapping %08lx-%08lx\n", initrd_start, initrd_end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | map_pages(initrd_start, __pa(initrd_start), |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 736 | initrd_end - initrd_start, PAGE_KERNEL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | } |
| 738 | #endif |
| 739 | |
| 740 | empty_zero_page = alloc_bootmem_pages(PAGE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | static void __init gateway_init(void) |
| 744 | { |
| 745 | unsigned long linux_gateway_page_addr; |
| 746 | /* FIXME: This is 'const' in order to trick the compiler |
| 747 | into not treating it as DP-relative data. */ |
| 748 | extern void * const linux_gateway_page; |
| 749 | |
| 750 | linux_gateway_page_addr = LINUX_GATEWAY_ADDR & PAGE_MASK; |
| 751 | |
| 752 | /* |
| 753 | * Setup Linux Gateway page. |
| 754 | * |
| 755 | * The Linux gateway page will reside in kernel space (on virtual |
| 756 | * page 0), so it doesn't need to be aliased into user space. |
| 757 | */ |
| 758 | |
| 759 | map_pages(linux_gateway_page_addr, __pa(&linux_gateway_page), |
James Bottomley | d7dd2ff | 2011-04-14 18:25:21 -0500 | [diff] [blame] | 760 | PAGE_SIZE, PAGE_GATEWAY, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | } |
| 762 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | void __init paging_init(void) |
| 764 | { |
| 765 | int i; |
| 766 | |
| 767 | setup_bootmem(); |
| 768 | pagetable_init(); |
| 769 | gateway_init(); |
| 770 | flush_cache_all_local(); /* start with known state */ |
Matthew Wilcox | ce33941 | 2006-01-10 20:47:49 -0500 | [diff] [blame] | 771 | flush_tlb_all_local(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
| 773 | for (i = 0; i < npmem_ranges; i++) { |
Christoph Lameter | f06a968 | 2006-09-25 23:31:10 -0700 | [diff] [blame] | 774 | unsigned long zones_size[MAX_NR_ZONES] = { 0, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
Christoph Lameter | 0059283 | 2007-02-10 01:43:12 -0800 | [diff] [blame] | 776 | zones_size[ZONE_NORMAL] = pmem_ranges[i].pages; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | |
| 778 | #ifdef CONFIG_DISCONTIGMEM |
| 779 | /* Need to initialize the pfnnid_map before we can initialize |
| 780 | the zone */ |
| 781 | { |
| 782 | int j; |
| 783 | for (j = (pmem_ranges[i].start_pfn >> PFNNID_SHIFT); |
| 784 | j <= ((pmem_ranges[i].start_pfn + pmem_ranges[i].pages) >> PFNNID_SHIFT); |
| 785 | j++) { |
| 786 | pfnnid_map[j] = i; |
| 787 | } |
| 788 | } |
| 789 | #endif |
| 790 | |
Johannes Weiner | 9109fb7 | 2008-07-23 21:27:20 -0700 | [diff] [blame] | 791 | free_area_init_node(i, zones_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | pmem_ranges[i].start_pfn, NULL); |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | #ifdef CONFIG_PA20 |
| 797 | |
| 798 | /* |
Simon Arlott | 7022672 | 2007-05-11 20:42:34 +0100 | [diff] [blame] | 799 | * Currently, all PA20 chips have 18 bit protection IDs, which is the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | * limiting factor (space ids are 32 bits). |
| 801 | */ |
| 802 | |
| 803 | #define NR_SPACE_IDS 262144 |
| 804 | |
| 805 | #else |
| 806 | |
| 807 | /* |
Simon Arlott | 7022672 | 2007-05-11 20:42:34 +0100 | [diff] [blame] | 808 | * Currently we have a one-to-one relationship between space IDs and |
| 809 | * protection IDs. Older parisc chips (PCXS, PCXT, PCXL, PCXL2) only |
| 810 | * support 15 bit protection IDs, so that is the limiting factor. |
| 811 | * PCXT' has 18 bit protection IDs, but only 16 bit spaceids, so it's |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | * probably not worth the effort for a special case here. |
| 813 | */ |
| 814 | |
| 815 | #define NR_SPACE_IDS 32768 |
| 816 | |
| 817 | #endif /* !CONFIG_PA20 */ |
| 818 | |
| 819 | #define RECYCLE_THRESHOLD (NR_SPACE_IDS / 2) |
| 820 | #define SID_ARRAY_SIZE (NR_SPACE_IDS / (8 * sizeof(long))) |
| 821 | |
| 822 | static unsigned long space_id[SID_ARRAY_SIZE] = { 1 }; /* disallow space 0 */ |
| 823 | static unsigned long dirty_space_id[SID_ARRAY_SIZE]; |
| 824 | static unsigned long space_id_index; |
| 825 | static unsigned long free_space_ids = NR_SPACE_IDS - 1; |
| 826 | static unsigned long dirty_space_ids = 0; |
| 827 | |
| 828 | static DEFINE_SPINLOCK(sid_lock); |
| 829 | |
| 830 | unsigned long alloc_sid(void) |
| 831 | { |
| 832 | unsigned long index; |
| 833 | |
| 834 | spin_lock(&sid_lock); |
| 835 | |
| 836 | if (free_space_ids == 0) { |
| 837 | if (dirty_space_ids != 0) { |
| 838 | spin_unlock(&sid_lock); |
| 839 | flush_tlb_all(); /* flush_tlb_all() calls recycle_sids() */ |
| 840 | spin_lock(&sid_lock); |
| 841 | } |
Helge Deller | 2fd8303 | 2006-04-20 20:40:23 +0000 | [diff] [blame] | 842 | BUG_ON(free_space_ids == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
| 844 | |
| 845 | free_space_ids--; |
| 846 | |
| 847 | index = find_next_zero_bit(space_id, NR_SPACE_IDS, space_id_index); |
| 848 | space_id[index >> SHIFT_PER_LONG] |= (1L << (index & (BITS_PER_LONG - 1))); |
| 849 | space_id_index = index; |
| 850 | |
| 851 | spin_unlock(&sid_lock); |
| 852 | |
| 853 | return index << SPACEID_SHIFT; |
| 854 | } |
| 855 | |
| 856 | void free_sid(unsigned long spaceid) |
| 857 | { |
| 858 | unsigned long index = spaceid >> SPACEID_SHIFT; |
| 859 | unsigned long *dirty_space_offset; |
| 860 | |
| 861 | dirty_space_offset = dirty_space_id + (index >> SHIFT_PER_LONG); |
| 862 | index &= (BITS_PER_LONG - 1); |
| 863 | |
| 864 | spin_lock(&sid_lock); |
| 865 | |
Helge Deller | 2fd8303 | 2006-04-20 20:40:23 +0000 | [diff] [blame] | 866 | BUG_ON(*dirty_space_offset & (1L << index)); /* attempt to free space id twice */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
| 868 | *dirty_space_offset |= (1L << index); |
| 869 | dirty_space_ids++; |
| 870 | |
| 871 | spin_unlock(&sid_lock); |
| 872 | } |
| 873 | |
| 874 | |
| 875 | #ifdef CONFIG_SMP |
| 876 | static void get_dirty_sids(unsigned long *ndirtyptr,unsigned long *dirty_array) |
| 877 | { |
| 878 | int i; |
| 879 | |
| 880 | /* NOTE: sid_lock must be held upon entry */ |
| 881 | |
| 882 | *ndirtyptr = dirty_space_ids; |
| 883 | if (dirty_space_ids != 0) { |
| 884 | for (i = 0; i < SID_ARRAY_SIZE; i++) { |
| 885 | dirty_array[i] = dirty_space_id[i]; |
| 886 | dirty_space_id[i] = 0; |
| 887 | } |
| 888 | dirty_space_ids = 0; |
| 889 | } |
| 890 | |
| 891 | return; |
| 892 | } |
| 893 | |
| 894 | static void recycle_sids(unsigned long ndirty,unsigned long *dirty_array) |
| 895 | { |
| 896 | int i; |
| 897 | |
| 898 | /* NOTE: sid_lock must be held upon entry */ |
| 899 | |
| 900 | if (ndirty != 0) { |
| 901 | for (i = 0; i < SID_ARRAY_SIZE; i++) { |
| 902 | space_id[i] ^= dirty_array[i]; |
| 903 | } |
| 904 | |
| 905 | free_space_ids += ndirty; |
| 906 | space_id_index = 0; |
| 907 | } |
| 908 | } |
| 909 | |
| 910 | #else /* CONFIG_SMP */ |
| 911 | |
| 912 | static void recycle_sids(void) |
| 913 | { |
| 914 | int i; |
| 915 | |
| 916 | /* NOTE: sid_lock must be held upon entry */ |
| 917 | |
| 918 | if (dirty_space_ids != 0) { |
| 919 | for (i = 0; i < SID_ARRAY_SIZE; i++) { |
| 920 | space_id[i] ^= dirty_space_id[i]; |
| 921 | dirty_space_id[i] = 0; |
| 922 | } |
| 923 | |
| 924 | free_space_ids += dirty_space_ids; |
| 925 | dirty_space_ids = 0; |
| 926 | space_id_index = 0; |
| 927 | } |
| 928 | } |
| 929 | #endif |
| 930 | |
| 931 | /* |
| 932 | * flush_tlb_all() calls recycle_sids(), since whenever the entire tlb is |
| 933 | * purged, we can safely reuse the space ids that were released but |
| 934 | * not flushed from the tlb. |
| 935 | */ |
| 936 | |
| 937 | #ifdef CONFIG_SMP |
| 938 | |
| 939 | static unsigned long recycle_ndirty; |
| 940 | static unsigned long recycle_dirty_array[SID_ARRAY_SIZE]; |
Helge Deller | 2fd8303 | 2006-04-20 20:40:23 +0000 | [diff] [blame] | 941 | static unsigned int recycle_inuse; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
| 943 | void flush_tlb_all(void) |
| 944 | { |
| 945 | int do_recycle; |
| 946 | |
Helge Deller | 416821d | 2013-05-10 21:24:01 +0000 | [diff] [blame] | 947 | __inc_irq_stat(irq_tlb_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | do_recycle = 0; |
| 949 | spin_lock(&sid_lock); |
| 950 | if (dirty_space_ids > RECYCLE_THRESHOLD) { |
Helge Deller | 2fd8303 | 2006-04-20 20:40:23 +0000 | [diff] [blame] | 951 | BUG_ON(recycle_inuse); /* FIXME: Use a semaphore/wait queue here */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | get_dirty_sids(&recycle_ndirty,recycle_dirty_array); |
| 953 | recycle_inuse++; |
| 954 | do_recycle++; |
| 955 | } |
| 956 | spin_unlock(&sid_lock); |
Jens Axboe | 15c8b6c | 2008-05-09 09:39:44 +0200 | [diff] [blame] | 957 | on_each_cpu(flush_tlb_all_local, NULL, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | if (do_recycle) { |
| 959 | spin_lock(&sid_lock); |
| 960 | recycle_sids(recycle_ndirty,recycle_dirty_array); |
| 961 | recycle_inuse = 0; |
| 962 | spin_unlock(&sid_lock); |
| 963 | } |
| 964 | } |
| 965 | #else |
| 966 | void flush_tlb_all(void) |
| 967 | { |
Helge Deller | 416821d | 2013-05-10 21:24:01 +0000 | [diff] [blame] | 968 | __inc_irq_stat(irq_tlb_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | spin_lock(&sid_lock); |
Matthew Wilcox | 1b2425e | 2006-01-10 20:47:49 -0500 | [diff] [blame] | 970 | flush_tlb_all_local(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | recycle_sids(); |
| 972 | spin_unlock(&sid_lock); |
| 973 | } |
| 974 | #endif |
| 975 | |
| 976 | #ifdef CONFIG_BLK_DEV_INITRD |
| 977 | void free_initrd_mem(unsigned long start, unsigned long end) |
| 978 | { |
Jiang Liu | 7d2c774 | 2013-07-03 15:04:07 -0700 | [diff] [blame] | 979 | free_reserved_area((void *)start, (void *)end, -1, "initrd"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | } |
| 981 | #endif |