Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mm/init.c |
| 3 | * |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 4 | * Copyright (C) 1995-2005 Russell King |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/kernel.h> |
| 11 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/swap.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/bootmem.h> |
| 15 | #include <linux/mman.h> |
Paul Gortmaker | dc28094 | 2011-07-31 16:17:29 -0400 | [diff] [blame] | 16 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/nodemask.h> |
| 18 | #include <linux/initrd.h> |
Grant Likely | 9eb8f67 | 2011-04-28 14:27:20 -0600 | [diff] [blame] | 19 | #include <linux/of_fdt.h> |
Nicolas Pitre | 3835f6c | 2008-09-17 15:21:55 -0400 | [diff] [blame] | 20 | #include <linux/highmem.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 21 | #include <linux/gfp.h> |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 22 | #include <linux/memblock.h> |
Marek Szyprowski | c790950 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 23 | #include <linux/dma-contiguous.h> |
Alessandro Rubini | 158e8bf | 2012-06-24 12:46:26 +0100 | [diff] [blame] | 24 | #include <linux/sizes.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Russell King | b4b20ad | 2014-04-13 18:57:29 +0100 | [diff] [blame] | 26 | #include <asm/cp15.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/mach-types.h> |
Russell King | 716a3dc | 2012-01-13 15:00:51 +0000 | [diff] [blame] | 28 | #include <asm/memblock.h> |
Grant Likely | 93c02ab | 2011-04-28 14:27:21 -0600 | [diff] [blame] | 29 | #include <asm/prom.h> |
Russell King | 37efe64 | 2008-12-01 11:53:07 +0000 | [diff] [blame] | 30 | #include <asm/sections.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/setup.h> |
| 32 | #include <asm/tlb.h> |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 33 | #include <asm/fixmap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
| 35 | #include <asm/mach/arch.h> |
| 36 | #include <asm/mach/map.h> |
| 37 | |
Russell King | 1b2e2b7 | 2006-08-21 17:06:38 +0100 | [diff] [blame] | 38 | #include "mm.h" |
| 39 | |
Russell King | b4b20ad | 2014-04-13 18:57:29 +0100 | [diff] [blame] | 40 | #ifdef CONFIG_CPU_CP15_MMU |
| 41 | unsigned long __init __clear_cr(unsigned long mask) |
| 42 | { |
Russell King | b4b20ad | 2014-04-13 18:57:29 +0100 | [diff] [blame] | 43 | cr_alignment = cr_alignment & ~mask; |
| 44 | return cr_alignment; |
| 45 | } |
| 46 | #endif |
| 47 | |
Vitaly Andrianov | de22cc6 | 2012-06-22 14:26:04 -0400 | [diff] [blame] | 48 | static phys_addr_t phys_initrd_start __initdata = 0; |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 49 | static unsigned long phys_initrd_size __initdata = 0; |
| 50 | |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 51 | static int __init early_initrd(char *p) |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 52 | { |
Vitaly Andrianov | de22cc6 | 2012-06-22 14:26:04 -0400 | [diff] [blame] | 53 | phys_addr_t start; |
| 54 | unsigned long size; |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 55 | char *endp; |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 56 | |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 57 | start = memparse(p, &endp); |
| 58 | if (*endp == ',') { |
| 59 | size = memparse(endp + 1, NULL); |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 60 | |
| 61 | phys_initrd_start = start; |
| 62 | phys_initrd_size = size; |
| 63 | } |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 64 | return 0; |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 65 | } |
Jeremy Kerr | 2b0d8c2 | 2010-01-11 23:17:34 +0100 | [diff] [blame] | 66 | early_param("initrd", early_initrd); |
Russell King | 012d1f4 | 2008-09-06 10:57:03 +0100 | [diff] [blame] | 67 | |
| 68 | static int __init parse_tag_initrd(const struct tag *tag) |
| 69 | { |
| 70 | printk(KERN_WARNING "ATAG_INITRD is deprecated; " |
| 71 | "please update your bootloader.\n"); |
| 72 | phys_initrd_start = __virt_to_phys(tag->u.initrd.start); |
| 73 | phys_initrd_size = tag->u.initrd.size; |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | __tagtable(ATAG_INITRD, parse_tag_initrd); |
| 78 | |
| 79 | static int __init parse_tag_initrd2(const struct tag *tag) |
| 80 | { |
| 81 | phys_initrd_start = tag->u.initrd.start; |
| 82 | phys_initrd_size = tag->u.initrd.size; |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | __tagtable(ATAG_INITRD2, parse_tag_initrd2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* |
Nicolas Pitre | 4b5f32c | 2008-10-06 13:24:40 -0400 | [diff] [blame] | 89 | * This keeps memory configuration data used by a couple memory |
| 90 | * initialization functions, as well as show_mem() for the skipping |
| 91 | * of holes in the memory map. It is populated by arm_add_memory(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | */ |
David Rientjes | b2b755b | 2011-03-24 15:18:15 -0700 | [diff] [blame] | 93 | void show_mem(unsigned int filter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | { |
| 95 | int free = 0, total = 0, reserved = 0; |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 96 | int shared = 0, cached = 0, slab = 0; |
| 97 | struct memblock_region *reg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | printk("Mem-info:\n"); |
David Rientjes | 7bf02ea | 2011-05-24 17:11:16 -0700 | [diff] [blame] | 100 | show_free_areas(filter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 102 | for_each_memblock (memory, reg) { |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 103 | unsigned int pfn1, pfn2; |
| 104 | struct page *page, *end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 106 | pfn1 = memblock_region_memory_base_pfn(reg); |
| 107 | pfn2 = memblock_region_memory_end_pfn(reg); |
Ray Lehtiniemi | 5e70982 | 2006-11-07 03:19:15 +0100 | [diff] [blame] | 108 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 109 | page = pfn_to_page(pfn1); |
| 110 | end = pfn_to_page(pfn2 - 1) + 1; |
| 111 | |
| 112 | do { |
| 113 | total++; |
| 114 | if (PageReserved(page)) |
| 115 | reserved++; |
| 116 | else if (PageSwapCache(page)) |
| 117 | cached++; |
| 118 | else if (PageSlab(page)) |
| 119 | slab++; |
| 120 | else if (!page_count(page)) |
| 121 | free++; |
| 122 | else |
| 123 | shared += page_count(page) - 1; |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 124 | pfn1++; |
| 125 | page = pfn_to_page(pfn1); |
| 126 | } while (pfn1 < pfn2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | printk("%d pages of RAM\n", total); |
| 130 | printk("%d free pages\n", free); |
| 131 | printk("%d reserved pages\n", reserved); |
| 132 | printk("%d slab pages\n", slab); |
| 133 | printk("%d pages shared\n", shared); |
| 134 | printk("%d pages swap cached\n", cached); |
| 135 | } |
| 136 | |
Russell King | f25b4b4 | 2010-10-27 19:49:33 +0100 | [diff] [blame] | 137 | static void __init find_limits(unsigned long *min, unsigned long *max_low, |
Nicolas Pitre | 27a3f0e | 2011-08-25 19:10:29 -0400 | [diff] [blame] | 138 | unsigned long *max_high) |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 139 | { |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 140 | *max_low = PFN_DOWN(memblock_get_current_limit()); |
| 141 | *min = PFN_UP(memblock_start_of_DRAM()); |
| 142 | *max_high = PFN_DOWN(memblock_end_of_DRAM()); |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 143 | } |
| 144 | |
Russell King | be20902 | 2011-05-11 15:39:00 +0100 | [diff] [blame] | 145 | #ifdef CONFIG_ZONE_DMA |
Nicolas Pitre | 6503201 | 2011-07-18 15:05:10 -0400 | [diff] [blame] | 146 | |
Rob Herring | 364230b | 2013-08-01 15:29:29 -0500 | [diff] [blame] | 147 | phys_addr_t arm_dma_zone_size __read_mostly; |
Nicolas Pitre | 6503201 | 2011-07-18 15:05:10 -0400 | [diff] [blame] | 148 | EXPORT_SYMBOL(arm_dma_zone_size); |
| 149 | |
Russell King | 022ae53 | 2011-07-08 21:26:59 +0100 | [diff] [blame] | 150 | /* |
| 151 | * The DMA mask corresponding to the maximum bus address allocatable |
| 152 | * using GFP_DMA. The default here places no restriction on DMA |
| 153 | * allocations. This must be the smallest DMA mask in the system, |
| 154 | * so a successful GFP_DMA allocation will always satisfy this. |
| 155 | */ |
Marek Szyprowski | 4986e5c | 2012-06-06 12:05:01 +0200 | [diff] [blame] | 156 | phys_addr_t arm_dma_limit; |
Russell King | 4dcfa60 | 2013-07-09 12:14:49 +0100 | [diff] [blame] | 157 | unsigned long arm_dma_pfn_limit; |
Russell King | 022ae53 | 2011-07-08 21:26:59 +0100 | [diff] [blame] | 158 | |
Russell King | be20902 | 2011-05-11 15:39:00 +0100 | [diff] [blame] | 159 | static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole, |
| 160 | unsigned long dma_size) |
| 161 | { |
| 162 | if (size[0] <= dma_size) |
| 163 | return; |
| 164 | |
| 165 | size[ZONE_NORMAL] = size[0] - dma_size; |
| 166 | size[ZONE_DMA] = dma_size; |
| 167 | hole[ZONE_NORMAL] = hole[0]; |
| 168 | hole[ZONE_DMA] = 0; |
| 169 | } |
| 170 | #endif |
| 171 | |
Russell King | ff69a4c | 2013-07-26 14:55:59 +0100 | [diff] [blame] | 172 | void __init setup_dma_zone(const struct machine_desc *mdesc) |
Marek Szyprowski | c790950 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 173 | { |
| 174 | #ifdef CONFIG_ZONE_DMA |
| 175 | if (mdesc->dma_zone_size) { |
| 176 | arm_dma_zone_size = mdesc->dma_zone_size; |
Russell King | 6bcac80 | 2014-01-07 17:53:54 +0000 | [diff] [blame] | 177 | arm_dma_limit = PHYS_OFFSET + arm_dma_zone_size - 1; |
Marek Szyprowski | c790950 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 178 | } else |
| 179 | arm_dma_limit = 0xffffffff; |
Russell King | 4dcfa60 | 2013-07-09 12:14:49 +0100 | [diff] [blame] | 180 | arm_dma_pfn_limit = arm_dma_limit >> PAGE_SHIFT; |
Marek Szyprowski | c790950 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 181 | #endif |
| 182 | } |
| 183 | |
Santosh Shilimkar | 84f452b | 2013-06-30 00:28:46 -0400 | [diff] [blame] | 184 | static void __init zone_sizes_init(unsigned long min, unsigned long max_low, |
Russell King | a2c54d2 | 2010-10-27 19:17:31 +0100 | [diff] [blame] | 185 | unsigned long max_high) |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 186 | { |
| 187 | unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES]; |
Russell King | a2c54d2 | 2010-10-27 19:17:31 +0100 | [diff] [blame] | 188 | struct memblock_region *reg; |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 189 | |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 190 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 191 | * initialise the zones. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 192 | */ |
| 193 | memset(zone_size, 0, sizeof(zone_size)); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 194 | |
| 195 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 196 | * The memory size has already been determined. If we need |
| 197 | * to do anything fancy with the allocation of this memory |
| 198 | * to the zones, now is the time to do it. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 199 | */ |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 200 | zone_size[0] = max_low - min; |
| 201 | #ifdef CONFIG_HIGHMEM |
| 202 | zone_size[ZONE_HIGHMEM] = max_high - max_low; |
| 203 | #endif |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 204 | |
| 205 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 206 | * Calculate the size of the holes. |
| 207 | * holes = node_size - sum(bank_sizes) |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 208 | */ |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 209 | memcpy(zhole_size, zone_size, sizeof(zhole_size)); |
Russell King | a2c54d2 | 2010-10-27 19:17:31 +0100 | [diff] [blame] | 210 | for_each_memblock(memory, reg) { |
| 211 | unsigned long start = memblock_region_memory_base_pfn(reg); |
| 212 | unsigned long end = memblock_region_memory_end_pfn(reg); |
| 213 | |
| 214 | if (start < max_low) { |
| 215 | unsigned long low_end = min(end, max_low); |
| 216 | zhole_size[0] -= low_end - start; |
| 217 | } |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 218 | #ifdef CONFIG_HIGHMEM |
Russell King | a2c54d2 | 2010-10-27 19:17:31 +0100 | [diff] [blame] | 219 | if (end > max_low) { |
| 220 | unsigned long high_start = max(start, max_low); |
| 221 | zhole_size[ZONE_HIGHMEM] -= end - high_start; |
| 222 | } |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 223 | #endif |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 224 | } |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 225 | |
Nicolas Pitre | 6503201 | 2011-07-18 15:05:10 -0400 | [diff] [blame] | 226 | #ifdef CONFIG_ZONE_DMA |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 227 | /* |
| 228 | * Adjust the sizes according to any special requirements for |
| 229 | * this machine type. |
| 230 | */ |
Marek Szyprowski | c790950 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 231 | if (arm_dma_zone_size) |
Nicolas Pitre | 6503201 | 2011-07-18 15:05:10 -0400 | [diff] [blame] | 232 | arm_adjust_dma_zone(zone_size, zhole_size, |
| 233 | arm_dma_zone_size >> PAGE_SHIFT); |
Russell King | be20902 | 2011-05-11 15:39:00 +0100 | [diff] [blame] | 234 | #endif |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 235 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 236 | free_area_init_node(0, zone_size, min, zhole_size); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 237 | } |
| 238 | |
Will Deacon | 7b7bf49 | 2011-05-19 13:21:14 +0100 | [diff] [blame] | 239 | #ifdef CONFIG_HAVE_ARCH_PFN_VALID |
Russell King | b7cfda9 | 2009-09-07 15:06:42 +0100 | [diff] [blame] | 240 | int pfn_valid(unsigned long pfn) |
| 241 | { |
Mark Rutland | fb492c9 | 2011-08-30 17:45:10 +0100 | [diff] [blame] | 242 | return memblock_is_memory(__pfn_to_phys(pfn)); |
Russell King | b7cfda9 | 2009-09-07 15:06:42 +0100 | [diff] [blame] | 243 | } |
| 244 | EXPORT_SYMBOL(pfn_valid); |
Will Deacon | 7b7bf49 | 2011-05-19 13:21:14 +0100 | [diff] [blame] | 245 | #endif |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 246 | |
Will Deacon | 7b7bf49 | 2011-05-19 13:21:14 +0100 | [diff] [blame] | 247 | #ifndef CONFIG_SPARSEMEM |
Stephen Boyd | 1490492 | 2012-04-27 01:40:10 +0100 | [diff] [blame] | 248 | static void __init arm_memory_present(void) |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 249 | { |
| 250 | } |
| 251 | #else |
Stephen Boyd | 1490492 | 2012-04-27 01:40:10 +0100 | [diff] [blame] | 252 | static void __init arm_memory_present(void) |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 253 | { |
Benjamin Herrenschmidt | 719c1514 | 2010-08-05 12:55:55 +1000 | [diff] [blame] | 254 | struct memblock_region *reg; |
Benjamin Herrenschmidt | 719c1514 | 2010-08-05 12:55:55 +1000 | [diff] [blame] | 255 | |
Yinghai Lu | 7c99636 | 2010-09-16 00:20:36 -0700 | [diff] [blame] | 256 | for_each_memblock(memory, reg) |
Yinghai Lu | c7fc2de | 2010-10-12 14:07:09 -0700 | [diff] [blame] | 257 | memory_present(0, memblock_region_memory_base_pfn(reg), |
| 258 | memblock_region_memory_end_pfn(reg)); |
Russell King | 657e12f | 2009-10-29 17:06:17 +0000 | [diff] [blame] | 259 | } |
Russell King | b7cfda9 | 2009-09-07 15:06:42 +0100 | [diff] [blame] | 260 | #endif |
| 261 | |
Russell King | 716a3dc | 2012-01-13 15:00:51 +0000 | [diff] [blame] | 262 | static bool arm_memblock_steal_permitted = true; |
| 263 | |
Russell King | bc2827d | 2012-01-19 14:35:19 +0000 | [diff] [blame] | 264 | phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align) |
Russell King | 716a3dc | 2012-01-13 15:00:51 +0000 | [diff] [blame] | 265 | { |
| 266 | phys_addr_t phys; |
| 267 | |
| 268 | BUG_ON(!arm_memblock_steal_permitted); |
| 269 | |
Russell King | 7ac68a4 | 2012-08-13 00:22:28 +0100 | [diff] [blame] | 270 | phys = memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ANYWHERE); |
Russell King | 716a3dc | 2012-01-13 15:00:51 +0000 | [diff] [blame] | 271 | memblock_free(phys, size); |
| 272 | memblock_remove(phys, size); |
| 273 | |
| 274 | return phys; |
| 275 | } |
| 276 | |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 277 | void __init arm_memblock_init(const struct machine_desc *mdesc) |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 278 | { |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 279 | /* Register the kernel text, kernel data and initrd with memblock. */ |
| 280 | #ifdef CONFIG_XIP_KERNEL |
Russell King | 842eab4 | 2010-10-01 14:12:22 +0100 | [diff] [blame] | 281 | memblock_reserve(__pa(_sdata), _end - _sdata); |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 282 | #else |
| 283 | memblock_reserve(__pa(_stext), _end - _stext); |
| 284 | #endif |
| 285 | #ifdef CONFIG_BLK_DEV_INITRD |
Rob Herring | 6593930 | 2013-08-30 10:54:26 -0500 | [diff] [blame] | 286 | /* FDT scan will populate initrd_start */ |
Ben Peddell | 4c235cb | 2014-01-13 23:25:18 +0100 | [diff] [blame] | 287 | if (initrd_start && !phys_initrd_size) { |
Rob Herring | 6593930 | 2013-08-30 10:54:26 -0500 | [diff] [blame] | 288 | phys_initrd_start = __virt_to_phys(initrd_start); |
| 289 | phys_initrd_size = initrd_end - initrd_start; |
| 290 | } |
Ben Peddell | 4c235cb | 2014-01-13 23:25:18 +0100 | [diff] [blame] | 291 | initrd_start = initrd_end = 0; |
Russell King | b0a2679 | 2011-01-30 11:21:05 +0000 | [diff] [blame] | 292 | if (phys_initrd_size && |
Russell King | 8f4b8c7 | 2011-06-11 00:43:21 +0100 | [diff] [blame] | 293 | !memblock_is_region_memory(phys_initrd_start, phys_initrd_size)) { |
Vitaly Andrianov | de22cc6 | 2012-06-22 14:26:04 -0400 | [diff] [blame] | 294 | pr_err("INITRD: 0x%08llx+0x%08lx is not a memory region - disabling initrd\n", |
| 295 | (u64)phys_initrd_start, phys_initrd_size); |
Russell King | 8f4b8c7 | 2011-06-11 00:43:21 +0100 | [diff] [blame] | 296 | phys_initrd_start = phys_initrd_size = 0; |
| 297 | } |
| 298 | if (phys_initrd_size && |
Russell King | b0a2679 | 2011-01-30 11:21:05 +0000 | [diff] [blame] | 299 | memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) { |
Vitaly Andrianov | de22cc6 | 2012-06-22 14:26:04 -0400 | [diff] [blame] | 300 | pr_err("INITRD: 0x%08llx+0x%08lx overlaps in-use memory region - disabling initrd\n", |
| 301 | (u64)phys_initrd_start, phys_initrd_size); |
Russell King | b0a2679 | 2011-01-30 11:21:05 +0000 | [diff] [blame] | 302 | phys_initrd_start = phys_initrd_size = 0; |
| 303 | } |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 304 | if (phys_initrd_size) { |
| 305 | memblock_reserve(phys_initrd_start, phys_initrd_size); |
| 306 | |
| 307 | /* Now convert initrd to virtual addresses */ |
| 308 | initrd_start = __phys_to_virt(phys_initrd_start); |
| 309 | initrd_end = initrd_start + phys_initrd_size; |
| 310 | } |
| 311 | #endif |
| 312 | |
| 313 | arm_mm_memblock_reserve(); |
| 314 | |
Russell King | 8d717a5 | 2010-05-22 19:47:18 +0100 | [diff] [blame] | 315 | /* reserve any platform specific memblock areas */ |
| 316 | if (mdesc->reserve) |
| 317 | mdesc->reserve(); |
| 318 | |
Marek Szyprowski | bcedb5f | 2014-02-28 14:42:54 +0100 | [diff] [blame] | 319 | early_init_fdt_scan_reserved_mem(); |
| 320 | |
Marek Szyprowski | c790950 | 2011-12-29 13:09:51 +0100 | [diff] [blame] | 321 | /* |
| 322 | * reserve memory for DMA contigouos allocations, |
| 323 | * must come from DMA area inside low memory |
| 324 | */ |
| 325 | dma_contiguous_reserve(min(arm_dma_limit, arm_lowmem_limit)); |
| 326 | |
Russell King | 716a3dc | 2012-01-13 15:00:51 +0000 | [diff] [blame] | 327 | arm_memblock_steal_permitted = false; |
Russell King | 2778f62 | 2010-07-09 16:27:52 +0100 | [diff] [blame] | 328 | memblock_dump_all(); |
| 329 | } |
| 330 | |
Russell King | 8d717a5 | 2010-05-22 19:47:18 +0100 | [diff] [blame] | 331 | void __init bootmem_init(void) |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 332 | { |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 333 | unsigned long min, max_low, max_high; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 334 | |
Grygorii Strashko | 8e58cae | 2013-11-23 14:42:18 -0500 | [diff] [blame] | 335 | memblock_allow_resize(); |
Russell King | dde5828 | 2009-08-15 12:36:00 +0100 | [diff] [blame] | 336 | max_low = max_high = 0; |
| 337 | |
Russell King | f25b4b4 | 2010-10-27 19:49:33 +0100 | [diff] [blame] | 338 | find_limits(&min, &max_low, &max_high); |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 339 | |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 340 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 341 | * Sparsemem tries to allocate bootmem in memory_present(), |
| 342 | * so must be done after the fixed reservations |
| 343 | */ |
Russell King | eda2e5d | 2010-07-01 12:00:57 +0100 | [diff] [blame] | 344 | arm_memory_present(); |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 345 | |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 346 | /* |
| 347 | * sparse_init() needs the bootmem allocator up and running. |
| 348 | */ |
| 349 | sparse_init(); |
| 350 | |
| 351 | /* |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 352 | * Now free the memory - free_area_init_node needs |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 353 | * the sparse mem_map arrays initialized by sparse_init() |
| 354 | * for memmap_init_zone(), otherwise all PFNs are invalid. |
| 355 | */ |
Santosh Shilimkar | 84f452b | 2013-06-30 00:28:46 -0400 | [diff] [blame] | 356 | zone_sizes_init(min, max_low, max_high); |
Russell King | b7a69ac | 2008-10-01 16:58:32 +0100 | [diff] [blame] | 357 | |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 358 | /* |
| 359 | * This doesn't seem to be used by the Linux memory manager any |
| 360 | * more, but is used by ll_rw_block. If we can get rid of it, we |
| 361 | * also get rid of some of the stuff above as well. |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 362 | */ |
Santosh Shilimkar | 26ba47b | 2013-08-01 03:12:01 +0100 | [diff] [blame] | 363 | min_low_pfn = min; |
| 364 | max_low_pfn = max_low; |
| 365 | max_pfn = max_high; |
Russell King | 9007205 | 2005-10-28 14:48:37 +0100 | [diff] [blame] | 366 | } |
| 367 | |
Stephen Boyd | 54d5257 | 2011-07-07 18:43:36 +0100 | [diff] [blame] | 368 | /* |
| 369 | * Poison init memory with an undefined instruction (ARM) or a branch to an |
| 370 | * undefined instruction (Thumb). |
| 371 | */ |
| 372 | static inline void poison_init_mem(void *s, size_t count) |
| 373 | { |
| 374 | u32 *p = (u32 *)s; |
Jamie Iles | bf912d9 | 2011-08-04 09:39:31 +0100 | [diff] [blame] | 375 | for (; count != 0; count -= 4) |
Stephen Boyd | 54d5257 | 2011-07-07 18:43:36 +0100 | [diff] [blame] | 376 | *p++ = 0xe7fddef0; |
| 377 | } |
| 378 | |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 379 | static inline void |
Russell King | be37030 | 2010-05-07 17:40:33 +0100 | [diff] [blame] | 380 | free_memmap(unsigned long start_pfn, unsigned long end_pfn) |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 381 | { |
| 382 | struct page *start_pg, *end_pg; |
Vitaly Andrianov | 56bc628 | 2012-06-21 08:09:05 -0400 | [diff] [blame] | 383 | phys_addr_t pg, pgend; |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 384 | |
| 385 | /* |
| 386 | * Convert start_pfn/end_pfn to a struct page pointer. |
| 387 | */ |
Catalin Marinas | 3257f43 | 2009-10-06 17:57:22 +0100 | [diff] [blame] | 388 | start_pg = pfn_to_page(start_pfn - 1) + 1; |
Will Deacon | 9af386c | 2011-04-28 18:44:31 +0100 | [diff] [blame] | 389 | end_pg = pfn_to_page(end_pfn - 1) + 1; |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 390 | |
| 391 | /* |
| 392 | * Convert to physical addresses, and |
| 393 | * round start upwards and end downwards. |
| 394 | */ |
Vitaly Andrianov | 56bc628 | 2012-06-21 08:09:05 -0400 | [diff] [blame] | 395 | pg = PAGE_ALIGN(__pa(start_pg)); |
| 396 | pgend = __pa(end_pg) & PAGE_MASK; |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 397 | |
| 398 | /* |
| 399 | * If there are free pages between these, |
| 400 | * free the section of the memmap array. |
| 401 | */ |
| 402 | if (pg < pgend) |
Santosh Shilimkar | cfb66586 | 2014-01-21 15:50:49 -0800 | [diff] [blame] | 403 | memblock_free_early(pg, pgend - pg); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 404 | } |
| 405 | |
| 406 | /* |
| 407 | * The mem_map array can get very big. Free the unused area of the memory map. |
| 408 | */ |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 409 | static void __init free_unused_memmap(void) |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 410 | { |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 411 | unsigned long start, prev_end = 0; |
| 412 | struct memblock_region *reg; |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 413 | |
| 414 | /* |
Michael Bohan | 3260e52 | 2010-06-14 13:06:56 -0700 | [diff] [blame] | 415 | * This relies on each bank being in address order. |
| 416 | * The banks are sorted previously in bootmem_init(). |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 417 | */ |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 418 | for_each_memblock(memory, reg) { |
| 419 | start = memblock_region_memory_base_pfn(reg); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 420 | |
Will Deacon | 9af386c | 2011-04-28 18:44:31 +0100 | [diff] [blame] | 421 | #ifdef CONFIG_SPARSEMEM |
| 422 | /* |
| 423 | * Take care not to free memmap entries that don't exist |
| 424 | * due to SPARSEMEM sections which aren't present. |
| 425 | */ |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 426 | start = min(start, |
| 427 | ALIGN(prev_end, PAGES_PER_SECTION)); |
Linus Walleij | 002ea9eef | 2011-09-29 09:37:23 +0100 | [diff] [blame] | 428 | #else |
| 429 | /* |
| 430 | * Align down here since the VM subsystem insists that the |
| 431 | * memmap entries are valid from the bank start aligned to |
| 432 | * MAX_ORDER_NR_PAGES. |
| 433 | */ |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 434 | start = round_down(start, MAX_ORDER_NR_PAGES); |
Will Deacon | 9af386c | 2011-04-28 18:44:31 +0100 | [diff] [blame] | 435 | #endif |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 436 | /* |
| 437 | * If we had a previous bank, and there is a space |
| 438 | * between the current bank and the previous, free it. |
| 439 | */ |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 440 | if (prev_end && prev_end < start) |
| 441 | free_memmap(prev_end, start); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 442 | |
Michael Bohan | 3260e52 | 2010-06-14 13:06:56 -0700 | [diff] [blame] | 443 | /* |
| 444 | * Align up here since the VM subsystem insists that the |
| 445 | * memmap entries are valid from the bank end aligned to |
| 446 | * MAX_ORDER_NR_PAGES. |
| 447 | */ |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 448 | prev_end = ALIGN(memblock_region_memory_end_pfn(reg), |
| 449 | MAX_ORDER_NR_PAGES); |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 450 | } |
Will Deacon | 9af386c | 2011-04-28 18:44:31 +0100 | [diff] [blame] | 451 | |
| 452 | #ifdef CONFIG_SPARSEMEM |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 453 | if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION)) |
| 454 | free_memmap(prev_end, |
| 455 | ALIGN(prev_end, PAGES_PER_SECTION)); |
Will Deacon | 9af386c | 2011-04-28 18:44:31 +0100 | [diff] [blame] | 456 | #endif |
Russell King | a013053 | 2005-06-27 14:16:47 +0100 | [diff] [blame] | 457 | } |
| 458 | |
Jiang Liu | 83db038 | 2013-04-29 15:06:26 -0700 | [diff] [blame] | 459 | #ifdef CONFIG_HIGHMEM |
| 460 | static inline void free_area_high(unsigned long pfn, unsigned long end) |
| 461 | { |
Jiang Liu | dd6911e | 2013-04-29 15:07:03 -0700 | [diff] [blame] | 462 | for (; pfn < end; pfn++) |
| 463 | free_highmem_page(pfn_to_page(pfn)); |
Jiang Liu | 83db038 | 2013-04-29 15:06:26 -0700 | [diff] [blame] | 464 | } |
| 465 | #endif |
| 466 | |
Russell King | d0e775a | 2010-10-27 19:37:06 +0100 | [diff] [blame] | 467 | static void __init free_highpages(void) |
| 468 | { |
| 469 | #ifdef CONFIG_HIGHMEM |
Santosh Shilimkar | 26ba47b | 2013-08-01 03:12:01 +0100 | [diff] [blame] | 470 | unsigned long max_low = max_low_pfn; |
Russell King | df4f14c | 2010-10-27 19:45:49 +0100 | [diff] [blame] | 471 | struct memblock_region *mem, *res; |
Russell King | d0e775a | 2010-10-27 19:37:06 +0100 | [diff] [blame] | 472 | |
| 473 | /* set highmem page free */ |
Russell King | df4f14c | 2010-10-27 19:45:49 +0100 | [diff] [blame] | 474 | for_each_memblock(memory, mem) { |
| 475 | unsigned long start = memblock_region_memory_base_pfn(mem); |
| 476 | unsigned long end = memblock_region_memory_end_pfn(mem); |
| 477 | |
| 478 | /* Ignore complete lowmem entries */ |
| 479 | if (end <= max_low) |
| 480 | continue; |
| 481 | |
| 482 | /* Truncate partial highmem entries */ |
| 483 | if (start < max_low) |
| 484 | start = max_low; |
| 485 | |
| 486 | /* Find and exclude any reserved regions */ |
| 487 | for_each_memblock(reserved, res) { |
| 488 | unsigned long res_start, res_end; |
| 489 | |
| 490 | res_start = memblock_region_reserved_base_pfn(res); |
| 491 | res_end = memblock_region_reserved_end_pfn(res); |
| 492 | |
| 493 | if (res_end < start) |
| 494 | continue; |
| 495 | if (res_start < start) |
| 496 | res_start = start; |
| 497 | if (res_start > end) |
| 498 | res_start = end; |
| 499 | if (res_end > end) |
| 500 | res_end = end; |
| 501 | if (res_start != start) |
Jiang Liu | 83db038 | 2013-04-29 15:06:26 -0700 | [diff] [blame] | 502 | free_area_high(start, res_start); |
Russell King | df4f14c | 2010-10-27 19:45:49 +0100 | [diff] [blame] | 503 | start = res_end; |
| 504 | if (start == end) |
| 505 | break; |
| 506 | } |
| 507 | |
| 508 | /* And now free anything which remains */ |
| 509 | if (start < end) |
Jiang Liu | 83db038 | 2013-04-29 15:06:26 -0700 | [diff] [blame] | 510 | free_area_high(start, end); |
Russell King | d0e775a | 2010-10-27 19:37:06 +0100 | [diff] [blame] | 511 | } |
Russell King | d0e775a | 2010-10-27 19:37:06 +0100 | [diff] [blame] | 512 | #endif |
| 513 | } |
| 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | /* |
| 516 | * mem_init() marks the free areas in the mem_map and tells us how much |
| 517 | * memory is free. This is done after various parts of the system have |
| 518 | * claimed their memory after the kernel image. |
| 519 | */ |
| 520 | void __init mem_init(void) |
| 521 | { |
Linus Walleij | 1dbd30e | 2010-07-12 21:53:28 +0100 | [diff] [blame] | 522 | #ifdef CONFIG_HAVE_TCM |
| 523 | /* These pointers are filled in on TCM detection */ |
| 524 | extern u32 dtcm_end; |
| 525 | extern u32 itcm_end; |
| 526 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
Santosh Shilimkar | b3ba41f | 2013-11-23 14:36:42 -0500 | [diff] [blame] | 528 | set_max_mapnr(pfn_to_page(max_pfn) - mem_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | /* this will put all unused low memory onto the freelists */ |
Laura Abbott | 1c2f87c | 2014-04-13 22:54:58 +0100 | [diff] [blame] | 531 | free_unused_memmap(); |
Jiang Liu | 0c98853 | 2013-07-03 15:03:24 -0700 | [diff] [blame] | 532 | free_all_bootmem(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
| 534 | #ifdef CONFIG_SA1111 |
| 535 | /* now that our DMA memory is actually so designated, we can free it */ |
Linus Torvalds | bfd65dd | 2013-07-13 14:58:36 -0700 | [diff] [blame] | 536 | free_reserved_area(__va(PHYS_OFFSET), swapper_pg_dir, -1, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | #endif |
| 538 | |
Russell King | d0e775a | 2010-10-27 19:37:06 +0100 | [diff] [blame] | 539 | free_highpages(); |
Nicolas Pitre | 3835f6c | 2008-09-17 15:21:55 -0400 | [diff] [blame] | 540 | |
Jiang Liu | 2450c97 | 2013-07-03 15:03:48 -0700 | [diff] [blame] | 541 | mem_init_print_info(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 543 | #define MLK(b, t) b, t, ((t) - (b)) >> 10 |
| 544 | #define MLM(b, t) b, t, ((t) - (b)) >> 20 |
| 545 | #define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K) |
| 546 | |
| 547 | printk(KERN_NOTICE "Virtual kernel memory layout:\n" |
| 548 | " vector : 0x%08lx - 0x%08lx (%4ld kB)\n" |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 549 | #ifdef CONFIG_HAVE_TCM |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 550 | " DTCM : 0x%08lx - 0x%08lx (%4ld kB)\n" |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 551 | " ITCM : 0x%08lx - 0x%08lx (%4ld kB)\n" |
| 552 | #endif |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 553 | " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" |
| 554 | " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 555 | " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 556 | #ifdef CONFIG_HIGHMEM |
| 557 | " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n" |
| 558 | #endif |
Uwe Kleine-König | d9277d5 | 2012-02-01 11:16:51 +0100 | [diff] [blame] | 559 | #ifdef CONFIG_MODULES |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 560 | " modules : 0x%08lx - 0x%08lx (%4ld MB)\n" |
Uwe Kleine-König | d9277d5 | 2012-02-01 11:16:51 +0100 | [diff] [blame] | 561 | #endif |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 562 | " .text : 0x%p" " - 0x%p" " (%4d kB)\n" |
Russell King | 3835d69 | 2011-07-06 10:39:34 +0100 | [diff] [blame] | 563 | " .init : 0x%p" " - 0x%p" " (%4d kB)\n" |
Rabin Vincent | 45f6d7e | 2011-06-02 15:01:36 +0100 | [diff] [blame] | 564 | " .data : 0x%p" " - 0x%p" " (%4d kB)\n" |
| 565 | " .bss : 0x%p" " - 0x%p" " (%4d kB)\n", |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 566 | |
| 567 | MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) + |
| 568 | (PAGE_SIZE)), |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 569 | #ifdef CONFIG_HAVE_TCM |
Linus Walleij | 1dbd30e | 2010-07-12 21:53:28 +0100 | [diff] [blame] | 570 | MLK(DTCM_OFFSET, (unsigned long) dtcm_end), |
| 571 | MLK(ITCM_OFFSET, (unsigned long) itcm_end), |
Linus Walleij | 07d2a5c | 2010-07-12 21:52:34 +0100 | [diff] [blame] | 572 | #endif |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 573 | MLK(FIXADDR_START, FIXADDR_TOP), |
Fenkart/Bostandzhyan | c931b4f | 2010-02-07 21:47:17 +0100 | [diff] [blame] | 574 | MLM(VMALLOC_START, VMALLOC_END), |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 575 | MLM(PAGE_OFFSET, (unsigned long)high_memory), |
| 576 | #ifdef CONFIG_HIGHMEM |
| 577 | MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) * |
| 578 | (PAGE_SIZE)), |
| 579 | #endif |
Uwe Kleine-König | d9277d5 | 2012-02-01 11:16:51 +0100 | [diff] [blame] | 580 | #ifdef CONFIG_MODULES |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 581 | MLM(MODULES_VADDR, MODULES_END), |
Uwe Kleine-König | d9277d5 | 2012-02-01 11:16:51 +0100 | [diff] [blame] | 582 | #endif |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 583 | |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 584 | MLK_ROUNDUP(_text, _etext), |
Russell King | 3835d69 | 2011-07-06 10:39:34 +0100 | [diff] [blame] | 585 | MLK_ROUNDUP(__init_begin, __init_end), |
Rabin Vincent | 45f6d7e | 2011-06-02 15:01:36 +0100 | [diff] [blame] | 586 | MLK_ROUNDUP(_sdata, _edata), |
| 587 | MLK_ROUNDUP(__bss_start, __bss_stop)); |
Fenkart/Bostandzhyan | db9ef1a | 2010-02-07 21:45:47 +0100 | [diff] [blame] | 588 | |
| 589 | #undef MLK |
| 590 | #undef MLM |
| 591 | #undef MLK_ROUNDUP |
| 592 | |
Fenkart/Bostandzhyan | a183927 | 2010-02-07 21:47:58 +0100 | [diff] [blame] | 593 | /* |
| 594 | * Check boundaries twice: Some fundamental inconsistencies can |
| 595 | * be detected at build time already. |
| 596 | */ |
| 597 | #ifdef CONFIG_MMU |
Fenkart/Bostandzhyan | a183927 | 2010-02-07 21:47:58 +0100 | [diff] [blame] | 598 | BUILD_BUG_ON(TASK_SIZE > MODULES_VADDR); |
| 599 | BUG_ON(TASK_SIZE > MODULES_VADDR); |
| 600 | #endif |
| 601 | |
| 602 | #ifdef CONFIG_HIGHMEM |
| 603 | BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); |
| 604 | BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET); |
| 605 | #endif |
| 606 | |
Jiang Liu | 2450c97 | 2013-07-03 15:03:48 -0700 | [diff] [blame] | 607 | if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | extern int sysctl_overcommit_memory; |
| 609 | /* |
| 610 | * On a machine this small we won't get |
| 611 | * anywhere without overcommit, so turn |
| 612 | * it on by default. |
| 613 | */ |
| 614 | sysctl_overcommit_memory = OVERCOMMIT_ALWAYS; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | void free_initmem(void) |
| 619 | { |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 620 | #ifdef CONFIG_HAVE_TCM |
Linus Walleij | ea208f6 | 2010-05-26 07:37:57 +0100 | [diff] [blame] | 621 | extern char __tcm_start, __tcm_end; |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 622 | |
Stephen Boyd | 54d5257 | 2011-07-07 18:43:36 +0100 | [diff] [blame] | 623 | poison_init_mem(&__tcm_start, &__tcm_end - &__tcm_start); |
Jiang Liu | dbe67df | 2013-07-03 15:02:51 -0700 | [diff] [blame] | 624 | free_reserved_area(&__tcm_start, &__tcm_end, -1, "TCM link"); |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 625 | #endif |
| 626 | |
Stephen Boyd | 54d5257 | 2011-07-07 18:43:36 +0100 | [diff] [blame] | 627 | poison_init_mem(__init_begin, __init_end - __init_begin); |
Nicolas Pitre | 6db015e | 2008-09-17 14:50:42 -0400 | [diff] [blame] | 628 | if (!machine_is_integrator() && !machine_is_cintegrator()) |
Jiang Liu | dbe67df | 2013-07-03 15:02:51 -0700 | [diff] [blame] | 629 | free_initmem_default(-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | } |
| 631 | |
| 632 | #ifdef CONFIG_BLK_DEV_INITRD |
| 633 | |
| 634 | static int keep_initrd; |
| 635 | |
| 636 | void free_initrd_mem(unsigned long start, unsigned long end) |
| 637 | { |
Stephen Boyd | 54d5257 | 2011-07-07 18:43:36 +0100 | [diff] [blame] | 638 | if (!keep_initrd) { |
| 639 | poison_init_mem((void *)start, PAGE_ALIGN(end) - start); |
Jiang Liu | dbe67df | 2013-07-03 15:02:51 -0700 | [diff] [blame] | 640 | free_reserved_area((void *)start, (void *)end, -1, "initrd"); |
Stephen Boyd | 54d5257 | 2011-07-07 18:43:36 +0100 | [diff] [blame] | 641 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | static int __init keepinitrd_setup(char *__unused) |
| 645 | { |
| 646 | keep_initrd = 1; |
| 647 | return 1; |
| 648 | } |
| 649 | |
| 650 | __setup("keepinitrd", keepinitrd_setup); |
| 651 | #endif |