Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 1995 Linus Torvalds |
| 7 | * Copyright (C) 1995 Waldorf Electronics |
| 8 | * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle |
| 9 | * Copyright (C) 1996 Stoned Elipot |
| 10 | * Copyright (C) 1999 Silicon Graphics, Inc. |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 11 | * Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/init.h> |
| 14 | #include <linux/ioport.h> |
Paul Gortmaker | 73bc256 | 2011-07-23 16:30:40 -0400 | [diff] [blame] | 15 | #include <linux/export.h> |
Jon Smirl | 894673e | 2006-07-10 04:44:13 -0700 | [diff] [blame] | 16 | #include <linux/screen_info.h> |
Tejun Heo | 9d15ffc | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 17 | #include <linux/memblock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/bootmem.h> |
| 19 | #include <linux/initrd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/root_dev.h> |
| 21 | #include <linux/highmem.h> |
| 22 | #include <linux/console.h> |
Dave Hansen | 22a9835 | 2006-03-27 01:16:04 -0800 | [diff] [blame] | 23 | #include <linux/pfn.h> |
Atsushi Nemoto | 6312e0e | 2007-06-30 00:55:48 +0900 | [diff] [blame] | 24 | #include <linux/debugfs.h> |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 25 | #include <linux/kexec.h> |
John Crispin | 4d9f77d | 2013-04-13 13:15:47 +0200 | [diff] [blame] | 26 | #include <linux/sizes.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
| 28 | #include <asm/addrspace.h> |
| 29 | #include <asm/bootinfo.h> |
Maciej W. Rozycki | 20d60d9 | 2007-10-23 12:43:11 +0100 | [diff] [blame] | 30 | #include <asm/bugs.h> |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 31 | #include <asm/cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/cpu.h> |
| 33 | #include <asm/sections.h> |
| 34 | #include <asm/setup.h> |
Ralf Baechle | 87353d8 | 2007-11-19 12:23:51 +0000 | [diff] [blame] | 35 | #include <asm/smp-ops.h> |
Dezhong Diao | f2ffa5a | 2010-10-13 00:52:46 -0600 | [diff] [blame] | 36 | #include <asm/prom.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 38 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | EXPORT_SYMBOL(cpu_data); |
| 41 | |
| 42 | #ifdef CONFIG_VT |
| 43 | struct screen_info screen_info; |
| 44 | #endif |
| 45 | |
| 46 | /* |
| 47 | * Despite it's name this variable is even if we don't have PCI |
| 48 | */ |
| 49 | unsigned int PCI_DMA_BUS_IS_PHYS; |
| 50 | |
| 51 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); |
| 52 | |
| 53 | /* |
| 54 | * Setup information |
| 55 | * |
| 56 | * These are initialized so they are in the .data section |
| 57 | */ |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 58 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | EXPORT_SYMBOL(mips_machtype); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | struct boot_mem_map boot_mem_map; |
| 63 | |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 64 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
| 65 | char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; |
| 66 | |
| 67 | #ifdef CONFIG_CMDLINE_BOOL |
| 68 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; |
| 69 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | /* |
| 72 | * mips_io_port_base is the begin of the address space to which x86 style |
| 73 | * I/O ports are mapped. |
| 74 | */ |
David Daney | 1befdd5 | 2010-10-14 12:36:49 -0700 | [diff] [blame] | 75 | const unsigned long mips_io_port_base = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | EXPORT_SYMBOL(mips_io_port_base); |
| 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | static struct resource code_resource = { .name = "Kernel code", }; |
| 79 | static struct resource data_resource = { .name = "Kernel data", }; |
| 80 | |
John Crispin | 4d9f77d | 2013-04-13 13:15:47 +0200 | [diff] [blame] | 81 | static void *detect_magic __initdata = detect_memory_region; |
| 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | void __init add_memory_region(phys_t start, phys_t size, long type) |
| 84 | { |
| 85 | int x = boot_mem_map.nr_map; |
Ralf Baechle | 0ec7ec7 | 2012-11-15 12:53:59 +0100 | [diff] [blame] | 86 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 88 | /* Sanity check */ |
| 89 | if (start + size < start) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 90 | pr_warning("Trying to add an invalid memory region, skipped\n"); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 91 | return; |
| 92 | } |
| 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | /* |
Ralf Baechle | 0ec7ec7 | 2012-11-15 12:53:59 +0100 | [diff] [blame] | 95 | * Try to merge with existing entry, if any. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | */ |
Ralf Baechle | 0ec7ec7 | 2012-11-15 12:53:59 +0100 | [diff] [blame] | 97 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 98 | struct boot_mem_map_entry *entry = boot_mem_map.map + i; |
| 99 | unsigned long top; |
| 100 | |
| 101 | if (entry->type != type) |
| 102 | continue; |
| 103 | |
| 104 | if (start + size < entry->addr) |
| 105 | continue; /* no overlap */ |
| 106 | |
| 107 | if (entry->addr + entry->size < start) |
| 108 | continue; /* no overlap */ |
| 109 | |
| 110 | top = max(entry->addr + entry->size, start + size); |
| 111 | entry->addr = min(entry->addr, start); |
| 112 | entry->size = top - entry->addr; |
| 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | return; |
| 115 | } |
| 116 | |
Ralf Baechle | 0ec7ec7 | 2012-11-15 12:53:59 +0100 | [diff] [blame] | 117 | if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 118 | pr_err("Ooops! Too many entries in the memory map!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | return; |
| 120 | } |
| 121 | |
| 122 | boot_mem_map.map[x].addr = start; |
| 123 | boot_mem_map.map[x].size = size; |
| 124 | boot_mem_map.map[x].type = type; |
| 125 | boot_mem_map.nr_map++; |
| 126 | } |
| 127 | |
John Crispin | 4d9f77d | 2013-04-13 13:15:47 +0200 | [diff] [blame] | 128 | void __init detect_memory_region(phys_t start, phys_t sz_min, phys_t sz_max) |
| 129 | { |
| 130 | void *dm = &detect_magic; |
| 131 | phys_t size; |
| 132 | |
| 133 | for (size = sz_min; size < sz_max; size <<= 1) { |
| 134 | if (!memcmp(dm, dm + size, sizeof(detect_magic))) |
| 135 | break; |
| 136 | } |
| 137 | |
| 138 | pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n", |
| 139 | ((unsigned long long) size) / SZ_1M, |
| 140 | (unsigned long long) start, |
| 141 | ((unsigned long long) sz_min) / SZ_1M, |
| 142 | ((unsigned long long) sz_max) / SZ_1M); |
| 143 | |
| 144 | add_memory_region(start, size, BOOT_MEM_RAM); |
| 145 | } |
| 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | static void __init print_memory_map(void) |
| 148 | { |
| 149 | int i; |
| 150 | const int field = 2 * sizeof(unsigned long); |
| 151 | |
| 152 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 153 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | field, (unsigned long long) boot_mem_map.map[i].size, |
| 155 | field, (unsigned long long) boot_mem_map.map[i].addr); |
| 156 | |
| 157 | switch (boot_mem_map.map[i].type) { |
| 158 | case BOOT_MEM_RAM: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 159 | printk(KERN_CONT "(usable)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | break; |
David Daney | 43064c0 | 2011-11-22 14:38:03 +0000 | [diff] [blame] | 161 | case BOOT_MEM_INIT_RAM: |
| 162 | printk(KERN_CONT "(usable after init)\n"); |
| 163 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | case BOOT_MEM_ROM_DATA: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 165 | printk(KERN_CONT "(ROM data)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | break; |
| 167 | case BOOT_MEM_RESERVED: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 168 | printk(KERN_CONT "(reserved)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | break; |
| 170 | default: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 171 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | break; |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 177 | /* |
| 178 | * Manage initrd |
| 179 | */ |
| 180 | #ifdef CONFIG_BLK_DEV_INITRD |
| 181 | |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 182 | static int __init rd_start_early(char *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | { |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 184 | unsigned long start = memparse(p, &p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 186 | #ifdef CONFIG_64BIT |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 187 | /* Guess if the sign extension was forgotten by bootloader */ |
| 188 | if (start < XKPHYS) |
| 189 | start = (int)start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | #endif |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 191 | initrd_start = start; |
| 192 | initrd_end += start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | return 0; |
| 194 | } |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 195 | early_param("rd_start", rd_start_early); |
| 196 | |
| 197 | static int __init rd_size_early(char *p) |
| 198 | { |
| 199 | initrd_end += memparse(p, &p); |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 200 | return 0; |
| 201 | } |
| 202 | early_param("rd_size", rd_size_early); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 204 | /* it returns the next free pfn after initrd */ |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 205 | static unsigned long __init init_initrd(void) |
| 206 | { |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 207 | unsigned long end; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 208 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 209 | /* |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 210 | * Board specific code or command line parser should have |
| 211 | * already set up initrd_start and initrd_end. In these cases |
| 212 | * perfom sanity checks and use them if all looks good. |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 213 | */ |
Ralf Baechle | 32028f1 | 2009-12-17 01:57:07 +0000 | [diff] [blame] | 214 | if (!initrd_start || initrd_end <= initrd_start) |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 215 | goto disable; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 216 | |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 217 | if (initrd_start & ~PAGE_MASK) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 218 | pr_err("initrd start must be page aligned\n"); |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 219 | goto disable; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 220 | } |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 221 | if (initrd_start < PAGE_OFFSET) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 222 | pr_err("initrd start < PAGE_OFFSET\n"); |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 223 | goto disable; |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * Sanitize initrd addresses. For example firmware |
| 228 | * can't guess if they need to pass them through |
| 229 | * 64-bits values if the kernel has been built in pure |
| 230 | * 32-bit. We need also to switch from KSEG0 to XKPHYS |
| 231 | * addresses now, so the code can now safely use __pa(). |
| 232 | */ |
| 233 | end = __pa(initrd_end); |
| 234 | initrd_end = (unsigned long)__va(end); |
| 235 | initrd_start = (unsigned long)__va(__pa(initrd_start)); |
| 236 | |
| 237 | ROOT_DEV = Root_RAM0; |
| 238 | return PFN_UP(end); |
| 239 | disable: |
| 240 | initrd_start = 0; |
| 241 | initrd_end = 0; |
| 242 | return 0; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | static void __init finalize_initrd(void) |
| 246 | { |
| 247 | unsigned long size = initrd_end - initrd_start; |
| 248 | |
| 249 | if (size == 0) { |
| 250 | printk(KERN_INFO "Initrd not found or empty"); |
| 251 | goto disable; |
| 252 | } |
Franck Bui-Huu | d4df6d4 | 2006-10-19 13:20:01 +0200 | [diff] [blame] | 253 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 254 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 255 | goto disable; |
| 256 | } |
| 257 | |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 258 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 259 | initrd_below_start_ok = 1; |
| 260 | |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 261 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
| 262 | initrd_start, size); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 263 | return; |
| 264 | disable: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 265 | printk(KERN_CONT " - disabling initrd\n"); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 266 | initrd_start = 0; |
| 267 | initrd_end = 0; |
| 268 | } |
| 269 | |
| 270 | #else /* !CONFIG_BLK_DEV_INITRD */ |
| 271 | |
Ralf Baechle | 9ba126c | 2006-10-13 11:22:52 +0100 | [diff] [blame] | 272 | static unsigned long __init init_initrd(void) |
| 273 | { |
| 274 | return 0; |
| 275 | } |
| 276 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 277 | #define finalize_initrd() do {} while (0) |
| 278 | |
| 279 | #endif |
| 280 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 281 | /* |
| 282 | * Initialize the bootmem allocator. It also setup initrd related data |
| 283 | * if needed. |
| 284 | */ |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 285 | #ifdef CONFIG_SGI_IP27 |
| 286 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 287 | static void __init bootmem_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | { |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 289 | init_initrd(); |
| 290 | finalize_initrd(); |
| 291 | } |
| 292 | |
| 293 | #else /* !CONFIG_SGI_IP27 */ |
| 294 | |
| 295 | static void __init bootmem_init(void) |
| 296 | { |
Atsushi Nemoto | e452e94 | 2008-01-08 00:41:13 +0900 | [diff] [blame] | 297 | unsigned long reserved_end; |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 298 | unsigned long mapstart = ~0UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | unsigned long bootmap_size; |
| 300 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 302 | /* |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 303 | * Init any data related to initrd. It's a nop if INITRD is |
| 304 | * not selected. Once that done we can determine the low bound |
| 305 | * of usable memory. |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 306 | */ |
Ralf Baechle | 12e22e8 | 2009-03-30 14:49:41 +0200 | [diff] [blame] | 307 | reserved_end = max(init_initrd(), |
| 308 | (unsigned long) PFN_UP(__pa_symbol(&_end))); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 309 | |
| 310 | /* |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 311 | * max_low_pfn is not a number of pages. The number of pages |
| 312 | * of the system is given by 'max_low_pfn - min_low_pfn'. |
| 313 | */ |
| 314 | min_low_pfn = ~0UL; |
| 315 | max_low_pfn = 0; |
| 316 | |
| 317 | /* |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 318 | * Find the highest page frame number we have available. |
| 319 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 321 | unsigned long start, end; |
| 322 | |
| 323 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) |
| 324 | continue; |
| 325 | |
| 326 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 327 | end = PFN_DOWN(boot_mem_map.map[i].addr |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 328 | + boot_mem_map.map[i].size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 330 | if (end > max_low_pfn) |
| 331 | max_low_pfn = end; |
| 332 | if (start < min_low_pfn) |
| 333 | min_low_pfn = start; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 334 | if (end <= reserved_end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | continue; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 336 | if (start >= mapstart) |
| 337 | continue; |
| 338 | mapstart = max(reserved_end, start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 341 | if (min_low_pfn >= max_low_pfn) |
| 342 | panic("Incorrect memory mapping !!!"); |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 343 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 344 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
| 345 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), |
| 346 | min_low_pfn - ARCH_PFN_OFFSET); |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 347 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 348 | pr_info("%lu free pages won't be used\n", |
| 349 | ARCH_PFN_OFFSET - min_low_pfn); |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 350 | } |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 351 | min_low_pfn = ARCH_PFN_OFFSET; |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | /* |
| 354 | * Determine low and high memory ranges |
| 355 | */ |
Ralf Baechle | dc3bf35 | 2008-04-18 10:56:07 +0100 | [diff] [blame] | 356 | max_pfn = max_low_pfn; |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 357 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | #ifdef CONFIG_HIGHMEM |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 359 | highstart_pfn = PFN_DOWN(HIGHMEM_START); |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 360 | highend_pfn = max_low_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | #endif |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 362 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 363 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 365 | /* |
| 366 | * Initialize the boot-time allocator with low memory only. |
| 367 | */ |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 368 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
| 369 | min_low_pfn, max_low_pfn); |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 370 | |
| 371 | |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 372 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 373 | unsigned long start, end; |
| 374 | |
| 375 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 376 | end = PFN_DOWN(boot_mem_map.map[i].addr |
| 377 | + boot_mem_map.map[i].size); |
| 378 | |
Atsushi Nemoto | e452e94 | 2008-01-08 00:41:13 +0900 | [diff] [blame] | 379 | if (start <= min_low_pfn) |
| 380 | start = min_low_pfn; |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 381 | if (start >= end) |
| 382 | continue; |
| 383 | |
| 384 | #ifndef CONFIG_HIGHMEM |
| 385 | if (end > max_low_pfn) |
| 386 | end = max_low_pfn; |
| 387 | |
| 388 | /* |
| 389 | * ... finally, is the area going away? |
| 390 | */ |
| 391 | if (end <= start) |
| 392 | continue; |
| 393 | #endif |
| 394 | |
Tejun Heo | 9d15ffc | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 395 | memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0); |
Ralf Baechle | cce335a | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 396 | } |
| 397 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | /* |
| 399 | * Register fully available low RAM pages with the bootmem allocator. |
| 400 | */ |
| 401 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 402 | unsigned long start, end, size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 404 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 405 | end = PFN_DOWN(boot_mem_map.map[i].addr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | + boot_mem_map.map[i].size); |
David Daney | 43064c0 | 2011-11-22 14:38:03 +0000 | [diff] [blame] | 407 | |
| 408 | /* |
| 409 | * Reserve usable memory. |
| 410 | */ |
| 411 | switch (boot_mem_map.map[i].type) { |
| 412 | case BOOT_MEM_RAM: |
| 413 | break; |
| 414 | case BOOT_MEM_INIT_RAM: |
| 415 | memory_present(0, start, end); |
| 416 | continue; |
| 417 | default: |
| 418 | /* Not usable memory */ |
| 419 | continue; |
| 420 | } |
| 421 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 422 | /* |
| 423 | * We are rounding up the start address of usable memory |
| 424 | * and at the end of the usable range downwards. |
| 425 | */ |
| 426 | if (start >= max_low_pfn) |
| 427 | continue; |
| 428 | if (start < reserved_end) |
| 429 | start = reserved_end; |
| 430 | if (end > max_low_pfn) |
| 431 | end = max_low_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | /* |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 434 | * ... finally, is the area going away? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | */ |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 436 | if (end <= start) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | continue; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 438 | size = end - start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
| 440 | /* Register lowmem ranges */ |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 441 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
| 442 | memory_present(0, start, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | } |
| 444 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 445 | /* |
| 446 | * Reserve the bootmap memory. |
| 447 | */ |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 448 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 449 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 450 | /* |
| 451 | * Reserve initrd memory if needed. |
| 452 | */ |
| 453 | finalize_initrd(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |
| 455 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 456 | #endif /* CONFIG_SGI_IP27 */ |
| 457 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 458 | /* |
Joe Perches | 603e82e | 2008-02-03 16:54:53 +0200 | [diff] [blame] | 459 | * arch_mem_init - initialize memory management subsystem |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 460 | * |
| 461 | * o plat_mem_setup() detects the memory configuration and will record detected |
| 462 | * memory areas using add_memory_region. |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 463 | * |
| 464 | * At this stage the memory configuration of the system is known to the |
Joe Perches | 603e82e | 2008-02-03 16:54:53 +0200 | [diff] [blame] | 465 | * kernel but generic memory management system is still entirely uninitialized. |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 466 | * |
| 467 | * o bootmem_init() |
| 468 | * o sparse_init() |
| 469 | * o paging_init() |
| 470 | * |
| 471 | * At this stage the bootmem allocator is ready to use. |
| 472 | * |
| 473 | * NOTE: historically plat_mem_setup did the entire platform initialization. |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 474 | * This was rather impractical because it meant plat_mem_setup had to |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 475 | * get away without any kind of memory allocator. To keep old code from |
| 476 | * breaking plat_setup was just renamed to plat_setup and a second platform |
| 477 | * initialization hook for anything else was introduced. |
| 478 | */ |
| 479 | |
Ralf Baechle | 982f6ff | 2009-09-17 02:25:07 +0200 | [diff] [blame] | 480 | static int usermem __initdata; |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 481 | |
| 482 | static int __init early_parse_mem(char *p) |
| 483 | { |
| 484 | unsigned long start, size; |
| 485 | |
| 486 | /* |
| 487 | * If a user specifies memory size, we |
| 488 | * blow away any automatically generated |
| 489 | * size. |
| 490 | */ |
| 491 | if (usermem == 0) { |
| 492 | boot_mem_map.nr_map = 0; |
| 493 | usermem = 1; |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 494 | } |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 495 | start = 0; |
| 496 | size = memparse(p, &p); |
| 497 | if (*p == '@') |
| 498 | start = memparse(p + 1, &p); |
| 499 | |
| 500 | add_memory_region(start, size, BOOT_MEM_RAM); |
| 501 | return 0; |
| 502 | } |
| 503 | early_param("mem", early_parse_mem); |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 504 | |
Corey Minyard | 4893fc8 | 2013-02-12 19:41:48 +0000 | [diff] [blame] | 505 | #ifdef CONFIG_PROC_VMCORE |
| 506 | unsigned long setup_elfcorehdr, setup_elfcorehdr_size; |
| 507 | static int __init early_parse_elfcorehdr(char *p) |
| 508 | { |
| 509 | int i; |
| 510 | |
| 511 | setup_elfcorehdr = memparse(p, &p); |
| 512 | |
| 513 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 514 | unsigned long start = boot_mem_map.map[i].addr; |
| 515 | unsigned long end = (boot_mem_map.map[i].addr + |
| 516 | boot_mem_map.map[i].size); |
| 517 | if (setup_elfcorehdr >= start && setup_elfcorehdr < end) { |
| 518 | /* |
| 519 | * Reserve from the elf core header to the end of |
| 520 | * the memory segment, that should all be kdump |
| 521 | * reserved memory. |
| 522 | */ |
| 523 | setup_elfcorehdr_size = end - setup_elfcorehdr; |
| 524 | break; |
| 525 | } |
| 526 | } |
| 527 | /* |
| 528 | * If we don't find it in the memory map, then we shouldn't |
| 529 | * have to worry about it, as the new kernel won't use it. |
| 530 | */ |
| 531 | return 0; |
| 532 | } |
| 533 | early_param("elfcorehdr", early_parse_elfcorehdr); |
| 534 | #endif |
| 535 | |
Corey Minyard | d3ff933 | 2013-02-12 19:41:47 +0000 | [diff] [blame] | 536 | static void __init arch_mem_addpart(phys_t mem, phys_t end, int type) |
| 537 | { |
| 538 | phys_t size; |
| 539 | int i; |
| 540 | |
| 541 | size = end - mem; |
| 542 | if (!size) |
| 543 | return; |
| 544 | |
| 545 | /* Make sure it is in the boot_mem_map */ |
| 546 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 547 | if (mem >= boot_mem_map.map[i].addr && |
| 548 | mem < (boot_mem_map.map[i].addr + |
| 549 | boot_mem_map.map[i].size)) |
| 550 | return; |
| 551 | } |
| 552 | add_memory_region(mem, size, type); |
| 553 | } |
| 554 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 555 | static void __init arch_mem_init(char **cmdline_p) |
| 556 | { |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 557 | extern void plat_mem_setup(void); |
| 558 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 559 | /* call board setup routine */ |
| 560 | plat_mem_setup(); |
| 561 | |
Corey Minyard | d3ff933 | 2013-02-12 19:41:47 +0000 | [diff] [blame] | 562 | /* |
| 563 | * Make sure all kernel memory is in the maps. The "UP" and |
| 564 | * "DOWN" are opposite for initdata since if it crosses over |
| 565 | * into another memory section you don't want that to be |
| 566 | * freed when the initdata is freed. |
| 567 | */ |
| 568 | arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT, |
| 569 | PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT, |
| 570 | BOOT_MEM_RAM); |
| 571 | arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT, |
| 572 | PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT, |
| 573 | BOOT_MEM_INIT_RAM); |
David Daney | 43064c0 | 2011-11-22 14:38:03 +0000 | [diff] [blame] | 574 | |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 575 | pr_info("Determined physical RAM map:\n"); |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 576 | print_memory_map(); |
| 577 | |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 578 | #ifdef CONFIG_CMDLINE_BOOL |
| 579 | #ifdef CONFIG_CMDLINE_OVERRIDE |
| 580 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
| 581 | #else |
| 582 | if (builtin_cmdline[0]) { |
| 583 | strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); |
| 584 | strlcat(arcs_cmdline, builtin_cmdline, COMMAND_LINE_SIZE); |
| 585 | } |
| 586 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); |
| 587 | #endif |
| 588 | #else |
| 589 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); |
| 590 | #endif |
| 591 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 592 | |
| 593 | *cmdline_p = command_line; |
| 594 | |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 595 | parse_early_param(); |
| 596 | |
| 597 | if (usermem) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 598 | pr_info("User-defined physical RAM map:\n"); |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 599 | print_memory_map(); |
| 600 | } |
| 601 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 602 | bootmem_init(); |
Corey Minyard | 4893fc8 | 2013-02-12 19:41:48 +0000 | [diff] [blame] | 603 | #ifdef CONFIG_PROC_VMCORE |
| 604 | if (setup_elfcorehdr && setup_elfcorehdr_size) { |
| 605 | printk(KERN_INFO "kdump reserved memory at %lx-%lx\n", |
| 606 | setup_elfcorehdr, setup_elfcorehdr_size); |
| 607 | reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size, |
| 608 | BOOTMEM_DEFAULT); |
| 609 | } |
| 610 | #endif |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 611 | #ifdef CONFIG_KEXEC |
| 612 | if (crashk_res.start != crashk_res.end) |
| 613 | reserve_bootmem(crashk_res.start, |
| 614 | crashk_res.end - crashk_res.start + 1, |
| 615 | BOOTMEM_DEFAULT); |
| 616 | #endif |
Dezhong Diao | f2ffa5a | 2010-10-13 00:52:46 -0600 | [diff] [blame] | 617 | device_tree_init(); |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 618 | sparse_init(); |
David Daney | ee71b7d | 2010-10-01 13:27:33 -0700 | [diff] [blame] | 619 | plat_swiotlb_setup(); |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 620 | paging_init(); |
| 621 | } |
| 622 | |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 623 | #ifdef CONFIG_KEXEC |
| 624 | static inline unsigned long long get_total_mem(void) |
| 625 | { |
| 626 | unsigned long long total; |
| 627 | |
| 628 | total = max_pfn - min_low_pfn; |
| 629 | return total << PAGE_SHIFT; |
| 630 | } |
| 631 | |
| 632 | static void __init mips_parse_crashkernel(void) |
| 633 | { |
| 634 | unsigned long long total_mem; |
| 635 | unsigned long long crash_size, crash_base; |
| 636 | int ret; |
| 637 | |
| 638 | total_mem = get_total_mem(); |
| 639 | ret = parse_crashkernel(boot_command_line, total_mem, |
| 640 | &crash_size, &crash_base); |
| 641 | if (ret != 0 || crash_size <= 0) |
| 642 | return; |
| 643 | |
| 644 | crashk_res.start = crash_base; |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 645 | crashk_res.end = crash_base + crash_size - 1; |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | static void __init request_crashkernel(struct resource *res) |
| 649 | { |
| 650 | int ret; |
| 651 | |
| 652 | ret = request_resource(res, &crashk_res); |
| 653 | if (!ret) |
| 654 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", |
| 655 | (unsigned long)((crashk_res.end - |
| 656 | crashk_res.start + 1) >> 20), |
| 657 | (unsigned long)(crashk_res.start >> 20)); |
| 658 | } |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 659 | #else /* !defined(CONFIG_KEXEC) */ |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 660 | static void __init mips_parse_crashkernel(void) |
| 661 | { |
| 662 | } |
| 663 | |
| 664 | static void __init request_crashkernel(struct resource *res) |
| 665 | { |
| 666 | } |
| 667 | #endif /* !defined(CONFIG_KEXEC) */ |
| 668 | |
Franck Bui-Huu | 8df32c6 | 2006-08-11 17:51:51 +0200 | [diff] [blame] | 669 | static void __init resource_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | { |
| 671 | int i; |
| 672 | |
Ralf Baechle | 6adb5fe | 2006-06-20 12:47:53 +0100 | [diff] [blame] | 673 | if (UNCAC_BASE != IO_BASE) |
| 674 | return; |
| 675 | |
Franck Bui-Huu | f5bffe3 | 2006-10-19 13:20:03 +0200 | [diff] [blame] | 676 | code_resource.start = __pa_symbol(&_text); |
| 677 | code_resource.end = __pa_symbol(&_etext) - 1; |
| 678 | data_resource.start = __pa_symbol(&_etext); |
| 679 | data_resource.end = __pa_symbol(&_edata) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
| 681 | /* |
| 682 | * Request address space for all standard RAM. |
| 683 | */ |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 684 | mips_parse_crashkernel(); |
| 685 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 687 | struct resource *res; |
| 688 | unsigned long start, end; |
| 689 | |
| 690 | start = boot_mem_map.map[i].addr; |
| 691 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; |
Franck Bui-Huu | 1c6fd44 | 2006-08-11 17:51:52 +0200 | [diff] [blame] | 692 | if (start >= HIGHMEM_START) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | continue; |
Franck Bui-Huu | 1c6fd44 | 2006-08-11 17:51:52 +0200 | [diff] [blame] | 694 | if (end >= HIGHMEM_START) |
| 695 | end = HIGHMEM_START - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
| 697 | res = alloc_bootmem(sizeof(struct resource)); |
| 698 | switch (boot_mem_map.map[i].type) { |
| 699 | case BOOT_MEM_RAM: |
David Daney | 43064c0 | 2011-11-22 14:38:03 +0000 | [diff] [blame] | 700 | case BOOT_MEM_INIT_RAM: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | case BOOT_MEM_ROM_DATA: |
| 702 | res->name = "System RAM"; |
| 703 | break; |
| 704 | case BOOT_MEM_RESERVED: |
| 705 | default: |
| 706 | res->name = "reserved"; |
| 707 | } |
| 708 | |
| 709 | res->start = start; |
| 710 | res->end = end; |
| 711 | |
| 712 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 713 | request_resource(&iomem_resource, res); |
| 714 | |
| 715 | /* |
| 716 | * We don't know which RAM region contains kernel data, |
| 717 | * so we try it repeatedly and let the resource manager |
| 718 | * test it. |
| 719 | */ |
| 720 | request_resource(res, &code_resource); |
| 721 | request_resource(res, &data_resource); |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 722 | request_crashkernel(res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | } |
| 724 | } |
| 725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | void __init setup_arch(char **cmdline_p) |
| 727 | { |
| 728 | cpu_probe(); |
| 729 | prom_init(); |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 730 | |
| 731 | #ifdef CONFIG_EARLY_PRINTK |
Dmitri Vorobiev | 07cdb78 | 2008-05-29 17:57:08 +0300 | [diff] [blame] | 732 | setup_early_printk(); |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 733 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | cpu_report(); |
Maciej W. Rozycki | 20d60d9 | 2007-10-23 12:43:11 +0100 | [diff] [blame] | 735 | check_bugs_early(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
| 737 | #if defined(CONFIG_VT) |
| 738 | #if defined(CONFIG_VGA_CONSOLE) |
Ralf Baechle | e0daad4 | 2007-02-05 00:10:11 +0000 | [diff] [blame] | 739 | conswitchp = &vga_con; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | #elif defined(CONFIG_DUMMY_CONSOLE) |
Ralf Baechle | e0daad4 | 2007-02-05 00:10:11 +0000 | [diff] [blame] | 741 | conswitchp = &dummy_con; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | #endif |
| 743 | #endif |
| 744 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 745 | arch_mem_init(cmdline_p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | resource_init(); |
Ralf Baechle | 9b6695a | 2006-02-23 12:23:27 +0000 | [diff] [blame] | 748 | plat_smp_setup(); |
David Daney | 6650df3 | 2012-05-15 00:04:50 -0700 | [diff] [blame] | 749 | |
| 750 | cpu_cache_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | } |
| 752 | |
Atsushi Nemoto | 69a6c31 | 2007-01-24 01:21:05 +0900 | [diff] [blame] | 753 | unsigned long kernelsp[NR_CPUS]; |
| 754 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; |
Atsushi Nemoto | 6312e0e | 2007-06-30 00:55:48 +0900 | [diff] [blame] | 755 | |
| 756 | #ifdef CONFIG_DEBUG_FS |
| 757 | struct dentry *mips_debugfs_dir; |
| 758 | static int __init debugfs_mips(void) |
| 759 | { |
| 760 | struct dentry *d; |
| 761 | |
| 762 | d = debugfs_create_dir("mips", NULL); |
Zhaolei | b517531 | 2008-10-17 19:12:35 +0800 | [diff] [blame] | 763 | if (!d) |
| 764 | return -ENOMEM; |
Atsushi Nemoto | 6312e0e | 2007-06-30 00:55:48 +0900 | [diff] [blame] | 765 | mips_debugfs_dir = d; |
| 766 | return 0; |
| 767 | } |
| 768 | arch_initcall(debugfs_mips); |
| 769 | #endif |