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> |
Zubair Lutfullah Kakakhel | f464938 | 2014-07-16 16:51:32 +0100 | [diff] [blame] | 27 | #include <linux/device.h> |
| 28 | #include <linux/dma-contiguous.h> |
Aurelien Jarno | 8f4703a | 2016-05-11 00:50:03 +0200 | [diff] [blame] | 29 | #include <linux/decompress/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | #include <asm/addrspace.h> |
| 32 | #include <asm/bootinfo.h> |
Maciej W. Rozycki | 20d60d9 | 2007-10-23 12:43:11 +0100 | [diff] [blame] | 33 | #include <asm/bugs.h> |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 34 | #include <asm/cache.h> |
James Hogan | e934945 | 2015-01-29 11:14:13 +0000 | [diff] [blame] | 35 | #include <asm/cdmm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <asm/cpu.h> |
Paul Burton | 75dcfc1 | 2015-09-22 10:10:55 -0700 | [diff] [blame] | 37 | #include <asm/debug.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <asm/sections.h> |
| 39 | #include <asm/setup.h> |
Ralf Baechle | 87353d8 | 2007-11-19 12:23:51 +0000 | [diff] [blame] | 40 | #include <asm/smp-ops.h> |
Dezhong Diao | f2ffa5a | 2010-10-13 00:52:46 -0600 | [diff] [blame] | 41 | #include <asm/prom.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Aaro Koskinen | 87db537 | 2015-09-11 17:46:14 +0300 | [diff] [blame] | 43 | #ifdef CONFIG_MIPS_ELF_APPENDED_DTB |
| 44 | const char __section(.appended_dtb) __appended_dtb[0x100000]; |
| 45 | #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */ |
| 46 | |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 47 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | EXPORT_SYMBOL(cpu_data); |
| 50 | |
| 51 | #ifdef CONFIG_VT |
| 52 | struct screen_info screen_info; |
| 53 | #endif |
| 54 | |
| 55 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | * Setup information |
| 57 | * |
| 58 | * These are initialized so they are in the .data section |
| 59 | */ |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 60 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | EXPORT_SYMBOL(mips_machtype); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | struct boot_mem_map boot_mem_map; |
| 65 | |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 66 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
| 67 | char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; |
| 68 | |
| 69 | #ifdef CONFIG_CMDLINE_BOOL |
| 70 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; |
| 71 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | /* |
| 74 | * mips_io_port_base is the begin of the address space to which x86 style |
| 75 | * I/O ports are mapped. |
| 76 | */ |
David Daney | 1befdd5 | 2010-10-14 12:36:49 -0700 | [diff] [blame] | 77 | const unsigned long mips_io_port_base = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | EXPORT_SYMBOL(mips_io_port_base); |
| 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | static struct resource code_resource = { .name = "Kernel code", }; |
| 81 | static struct resource data_resource = { .name = "Kernel data", }; |
| 82 | |
John Crispin | 4d9f77d | 2013-04-13 13:15:47 +0200 | [diff] [blame] | 83 | static void *detect_magic __initdata = detect_memory_region; |
| 84 | |
Ralf Baechle | 15d45cc | 2014-11-22 00:22:09 +0100 | [diff] [blame] | 85 | void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | { |
| 87 | int x = boot_mem_map.nr_map; |
Ralf Baechle | 0ec7ec7 | 2012-11-15 12:53:59 +0100 | [diff] [blame] | 88 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
James Hogan | 58cae9b | 2016-08-09 13:21:48 +0100 | [diff] [blame] | 90 | /* |
| 91 | * If the region reaches the top of the physical address space, adjust |
| 92 | * the size slightly so that (start + size) doesn't overflow |
| 93 | */ |
| 94 | if (start + size - 1 == (phys_addr_t)ULLONG_MAX) |
| 95 | --size; |
| 96 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 97 | /* Sanity check */ |
| 98 | if (start + size < start) { |
Joe Perches | 7178d2c | 2014-10-04 09:50:42 -0700 | [diff] [blame] | 99 | pr_warn("Trying to add an invalid memory region, skipped\n"); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 100 | return; |
| 101 | } |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /* |
Ralf Baechle | 0ec7ec7 | 2012-11-15 12:53:59 +0100 | [diff] [blame] | 104 | * Try to merge with existing entry, if any. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | */ |
Ralf Baechle | 0ec7ec7 | 2012-11-15 12:53:59 +0100 | [diff] [blame] | 106 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 107 | struct boot_mem_map_entry *entry = boot_mem_map.map + i; |
| 108 | unsigned long top; |
| 109 | |
| 110 | if (entry->type != type) |
| 111 | continue; |
| 112 | |
| 113 | if (start + size < entry->addr) |
| 114 | continue; /* no overlap */ |
| 115 | |
| 116 | if (entry->addr + entry->size < start) |
| 117 | continue; /* no overlap */ |
| 118 | |
| 119 | top = max(entry->addr + entry->size, start + size); |
| 120 | entry->addr = min(entry->addr, start); |
| 121 | entry->size = top - entry->addr; |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | return; |
| 124 | } |
| 125 | |
Ralf Baechle | 0ec7ec7 | 2012-11-15 12:53:59 +0100 | [diff] [blame] | 126 | if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 127 | pr_err("Ooops! Too many entries in the memory map!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | return; |
| 129 | } |
| 130 | |
| 131 | boot_mem_map.map[x].addr = start; |
| 132 | boot_mem_map.map[x].size = size; |
| 133 | boot_mem_map.map[x].type = type; |
| 134 | boot_mem_map.nr_map++; |
| 135 | } |
| 136 | |
Ralf Baechle | 15d45cc | 2014-11-22 00:22:09 +0100 | [diff] [blame] | 137 | void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max) |
John Crispin | 4d9f77d | 2013-04-13 13:15:47 +0200 | [diff] [blame] | 138 | { |
| 139 | void *dm = &detect_magic; |
Ralf Baechle | 15d45cc | 2014-11-22 00:22:09 +0100 | [diff] [blame] | 140 | phys_addr_t size; |
John Crispin | 4d9f77d | 2013-04-13 13:15:47 +0200 | [diff] [blame] | 141 | |
| 142 | for (size = sz_min; size < sz_max; size <<= 1) { |
| 143 | if (!memcmp(dm, dm + size, sizeof(detect_magic))) |
| 144 | break; |
| 145 | } |
| 146 | |
| 147 | pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n", |
| 148 | ((unsigned long long) size) / SZ_1M, |
| 149 | (unsigned long long) start, |
| 150 | ((unsigned long long) sz_min) / SZ_1M, |
| 151 | ((unsigned long long) sz_max) / SZ_1M); |
| 152 | |
| 153 | add_memory_region(start, size, BOOT_MEM_RAM); |
| 154 | } |
| 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | static void __init print_memory_map(void) |
| 157 | { |
| 158 | int i; |
| 159 | const int field = 2 * sizeof(unsigned long); |
| 160 | |
| 161 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 162 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | field, (unsigned long long) boot_mem_map.map[i].size, |
| 164 | field, (unsigned long long) boot_mem_map.map[i].addr); |
| 165 | |
| 166 | switch (boot_mem_map.map[i].type) { |
| 167 | case BOOT_MEM_RAM: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 168 | printk(KERN_CONT "(usable)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | break; |
David Daney | 43064c0 | 2011-11-22 14:38:03 +0000 | [diff] [blame] | 170 | case BOOT_MEM_INIT_RAM: |
| 171 | printk(KERN_CONT "(usable after init)\n"); |
| 172 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | case BOOT_MEM_ROM_DATA: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 174 | printk(KERN_CONT "(ROM data)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | break; |
| 176 | case BOOT_MEM_RESERVED: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 177 | printk(KERN_CONT "(reserved)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | break; |
| 179 | default: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 180 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | break; |
| 182 | } |
| 183 | } |
| 184 | } |
| 185 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 186 | /* |
| 187 | * Manage initrd |
| 188 | */ |
| 189 | #ifdef CONFIG_BLK_DEV_INITRD |
| 190 | |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 191 | static int __init rd_start_early(char *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | { |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 193 | unsigned long start = memparse(p, &p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 195 | #ifdef CONFIG_64BIT |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 196 | /* Guess if the sign extension was forgotten by bootloader */ |
| 197 | if (start < XKPHYS) |
| 198 | start = (int)start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | #endif |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 200 | initrd_start = start; |
| 201 | initrd_end += start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | return 0; |
| 203 | } |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 204 | early_param("rd_start", rd_start_early); |
| 205 | |
| 206 | static int __init rd_size_early(char *p) |
| 207 | { |
| 208 | initrd_end += memparse(p, &p); |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 209 | return 0; |
| 210 | } |
| 211 | early_param("rd_size", rd_size_early); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 213 | /* it returns the next free pfn after initrd */ |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 214 | static unsigned long __init init_initrd(void) |
| 215 | { |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 216 | unsigned long end; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 217 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 218 | /* |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 219 | * Board specific code or command line parser should have |
| 220 | * already set up initrd_start and initrd_end. In these cases |
| 221 | * perfom sanity checks and use them if all looks good. |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 222 | */ |
Ralf Baechle | 32028f1 | 2009-12-17 01:57:07 +0000 | [diff] [blame] | 223 | if (!initrd_start || initrd_end <= initrd_start) |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 224 | goto disable; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 225 | |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 226 | if (initrd_start & ~PAGE_MASK) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 227 | pr_err("initrd start must be page aligned\n"); |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 228 | goto disable; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 229 | } |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 230 | if (initrd_start < PAGE_OFFSET) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 231 | pr_err("initrd start < PAGE_OFFSET\n"); |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 232 | goto disable; |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * Sanitize initrd addresses. For example firmware |
| 237 | * can't guess if they need to pass them through |
| 238 | * 64-bits values if the kernel has been built in pure |
| 239 | * 32-bit. We need also to switch from KSEG0 to XKPHYS |
| 240 | * addresses now, so the code can now safely use __pa(). |
| 241 | */ |
| 242 | end = __pa(initrd_end); |
| 243 | initrd_end = (unsigned long)__va(end); |
| 244 | initrd_start = (unsigned long)__va(__pa(initrd_start)); |
| 245 | |
| 246 | ROOT_DEV = Root_RAM0; |
| 247 | return PFN_UP(end); |
| 248 | disable: |
| 249 | initrd_start = 0; |
| 250 | initrd_end = 0; |
| 251 | return 0; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 252 | } |
| 253 | |
Aurelien Jarno | 8f4703a | 2016-05-11 00:50:03 +0200 | [diff] [blame] | 254 | /* In some conditions (e.g. big endian bootloader with a little endian |
| 255 | kernel), the initrd might appear byte swapped. Try to detect this and |
| 256 | byte swap it if needed. */ |
| 257 | static void __init maybe_bswap_initrd(void) |
| 258 | { |
| 259 | #if defined(CONFIG_CPU_CAVIUM_OCTEON) |
| 260 | u64 buf; |
| 261 | |
| 262 | /* Check for CPIO signature */ |
| 263 | if (!memcmp((void *)initrd_start, "070701", 6)) |
| 264 | return; |
| 265 | |
| 266 | /* Check for compressed initrd */ |
| 267 | if (decompress_method((unsigned char *)initrd_start, 8, NULL)) |
| 268 | return; |
| 269 | |
| 270 | /* Try again with a byte swapped header */ |
| 271 | buf = swab64p((u64 *)initrd_start); |
| 272 | if (!memcmp(&buf, "070701", 6) || |
| 273 | decompress_method((unsigned char *)(&buf), 8, NULL)) { |
| 274 | unsigned long i; |
| 275 | |
| 276 | pr_info("Byteswapped initrd detected\n"); |
| 277 | for (i = initrd_start; i < ALIGN(initrd_end, 8); i += 8) |
| 278 | swab64s((u64 *)i); |
| 279 | } |
| 280 | #endif |
| 281 | } |
| 282 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 283 | static void __init finalize_initrd(void) |
| 284 | { |
| 285 | unsigned long size = initrd_end - initrd_start; |
| 286 | |
| 287 | if (size == 0) { |
| 288 | printk(KERN_INFO "Initrd not found or empty"); |
| 289 | goto disable; |
| 290 | } |
Franck Bui-Huu | d4df6d4 | 2006-10-19 13:20:01 +0200 | [diff] [blame] | 291 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 292 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 293 | goto disable; |
| 294 | } |
| 295 | |
Aurelien Jarno | 8f4703a | 2016-05-11 00:50:03 +0200 | [diff] [blame] | 296 | maybe_bswap_initrd(); |
| 297 | |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 298 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 299 | initrd_below_start_ok = 1; |
| 300 | |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 301 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
| 302 | initrd_start, size); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 303 | return; |
| 304 | disable: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 305 | printk(KERN_CONT " - disabling initrd\n"); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 306 | initrd_start = 0; |
| 307 | initrd_end = 0; |
| 308 | } |
| 309 | |
| 310 | #else /* !CONFIG_BLK_DEV_INITRD */ |
| 311 | |
Ralf Baechle | 9ba126c | 2006-10-13 11:22:52 +0100 | [diff] [blame] | 312 | static unsigned long __init init_initrd(void) |
| 313 | { |
| 314 | return 0; |
| 315 | } |
| 316 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 317 | #define finalize_initrd() do {} while (0) |
| 318 | |
| 319 | #endif |
| 320 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 321 | /* |
| 322 | * Initialize the bootmem allocator. It also setup initrd related data |
| 323 | * if needed. |
| 324 | */ |
Huacai Chen | c461731 | 2014-06-26 11:41:28 +0800 | [diff] [blame] | 325 | #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA)) |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 326 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 327 | static void __init bootmem_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 329 | init_initrd(); |
| 330 | finalize_initrd(); |
| 331 | } |
| 332 | |
| 333 | #else /* !CONFIG_SGI_IP27 */ |
| 334 | |
| 335 | static void __init bootmem_init(void) |
| 336 | { |
Atsushi Nemoto | e452e94 | 2008-01-08 00:41:13 +0900 | [diff] [blame] | 337 | unsigned long reserved_end; |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 338 | unsigned long mapstart = ~0UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | unsigned long bootmap_size; |
| 340 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 342 | /* |
Greg Ungerer | f9a7feb | 2010-09-08 15:50:43 +1000 | [diff] [blame] | 343 | * Sanity check any INITRD first. We don't take it into account |
| 344 | * for bootmem setup initially, rely on the end-of-kernel-code |
| 345 | * as our memory range starting point. Once bootmem is inited we |
| 346 | * will reserve the area used for the initrd. |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 347 | */ |
Greg Ungerer | f9a7feb | 2010-09-08 15:50:43 +1000 | [diff] [blame] | 348 | init_initrd(); |
| 349 | reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end)); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 350 | |
| 351 | /* |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 352 | * max_low_pfn is not a number of pages. The number of pages |
| 353 | * of the system is given by 'max_low_pfn - min_low_pfn'. |
| 354 | */ |
| 355 | min_low_pfn = ~0UL; |
| 356 | max_low_pfn = 0; |
| 357 | |
| 358 | /* |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 359 | * Find the highest page frame number we have available. |
| 360 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 362 | unsigned long start, end; |
| 363 | |
| 364 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) |
| 365 | continue; |
| 366 | |
| 367 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 368 | end = PFN_DOWN(boot_mem_map.map[i].addr |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 369 | + boot_mem_map.map[i].size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
James Hogan | 16a767e | 2016-11-01 13:59:09 +0000 | [diff] [blame^] | 371 | #ifndef CONFIG_HIGHMEM |
| 372 | /* |
| 373 | * Skip highmem here so we get an accurate max_low_pfn if low |
| 374 | * memory stops short of high memory. |
| 375 | * If the region overlaps HIGHMEM_START, end is clipped so |
| 376 | * max_pfn excludes the highmem portion. |
| 377 | */ |
| 378 | if (start >= PFN_DOWN(HIGHMEM_START)) |
| 379 | continue; |
| 380 | if (end > PFN_DOWN(HIGHMEM_START)) |
| 381 | end = PFN_DOWN(HIGHMEM_START); |
| 382 | #endif |
| 383 | |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 384 | if (end > max_low_pfn) |
| 385 | max_low_pfn = end; |
| 386 | if (start < min_low_pfn) |
| 387 | min_low_pfn = start; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 388 | if (end <= reserved_end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | continue; |
Alexander Sverdlin | a6335fa | 2015-07-02 17:16:01 +0200 | [diff] [blame] | 390 | #ifdef CONFIG_BLK_DEV_INITRD |
Alexander Sverdlin | 88d3426 | 2015-09-03 08:36:35 +0200 | [diff] [blame] | 391 | /* Skip zones before initrd and initrd itself */ |
Alexander Sverdlin | a6335fa | 2015-07-02 17:16:01 +0200 | [diff] [blame] | 392 | if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end))) |
| 393 | continue; |
| 394 | #endif |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 395 | if (start >= mapstart) |
| 396 | continue; |
| 397 | mapstart = max(reserved_end, start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | } |
| 399 | |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 400 | if (min_low_pfn >= max_low_pfn) |
| 401 | panic("Incorrect memory mapping !!!"); |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 402 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 403 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
| 404 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), |
| 405 | min_low_pfn - ARCH_PFN_OFFSET); |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 406 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 407 | pr_info("%lu free pages won't be used\n", |
| 408 | ARCH_PFN_OFFSET - min_low_pfn); |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 409 | } |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 410 | min_low_pfn = ARCH_PFN_OFFSET; |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | /* |
| 413 | * Determine low and high memory ranges |
| 414 | */ |
Ralf Baechle | dc3bf35 | 2008-04-18 10:56:07 +0100 | [diff] [blame] | 415 | max_pfn = max_low_pfn; |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 416 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | #ifdef CONFIG_HIGHMEM |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 418 | highstart_pfn = PFN_DOWN(HIGHMEM_START); |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 419 | highend_pfn = max_low_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | #endif |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 421 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 422 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
Alexander Sverdlin | 88d3426 | 2015-09-03 08:36:35 +0200 | [diff] [blame] | 424 | #ifdef CONFIG_BLK_DEV_INITRD |
| 425 | /* |
| 426 | * mapstart should be after initrd_end |
| 427 | */ |
| 428 | if (initrd_end) |
| 429 | mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end))); |
| 430 | #endif |
| 431 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 432 | /* |
| 433 | * Initialize the boot-time allocator with low memory only. |
| 434 | */ |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 435 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
| 436 | min_low_pfn, max_low_pfn); |
Ralf Baechle | cce335ae | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 437 | |
| 438 | |
Ralf Baechle | cce335ae | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 439 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 440 | unsigned long start, end; |
| 441 | |
| 442 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 443 | end = PFN_DOWN(boot_mem_map.map[i].addr |
| 444 | + boot_mem_map.map[i].size); |
| 445 | |
Atsushi Nemoto | e452e94 | 2008-01-08 00:41:13 +0900 | [diff] [blame] | 446 | if (start <= min_low_pfn) |
| 447 | start = min_low_pfn; |
Ralf Baechle | cce335ae | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 448 | if (start >= end) |
| 449 | continue; |
| 450 | |
| 451 | #ifndef CONFIG_HIGHMEM |
| 452 | if (end > max_low_pfn) |
| 453 | end = max_low_pfn; |
| 454 | |
| 455 | /* |
| 456 | * ... finally, is the area going away? |
| 457 | */ |
| 458 | if (end <= start) |
| 459 | continue; |
| 460 | #endif |
| 461 | |
Tejun Heo | 9d15ffc | 2011-12-08 10:22:09 -0800 | [diff] [blame] | 462 | memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0); |
Ralf Baechle | cce335ae | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 463 | } |
| 464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | /* |
| 466 | * Register fully available low RAM pages with the bootmem allocator. |
| 467 | */ |
| 468 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 469 | unsigned long start, end, size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 471 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 472 | end = PFN_DOWN(boot_mem_map.map[i].addr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | + boot_mem_map.map[i].size); |
David Daney | 43064c0 | 2011-11-22 14:38:03 +0000 | [diff] [blame] | 474 | |
| 475 | /* |
| 476 | * Reserve usable memory. |
| 477 | */ |
| 478 | switch (boot_mem_map.map[i].type) { |
| 479 | case BOOT_MEM_RAM: |
| 480 | break; |
| 481 | case BOOT_MEM_INIT_RAM: |
| 482 | memory_present(0, start, end); |
| 483 | continue; |
| 484 | default: |
| 485 | /* Not usable memory */ |
| 486 | continue; |
| 487 | } |
| 488 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 489 | /* |
| 490 | * We are rounding up the start address of usable memory |
| 491 | * and at the end of the usable range downwards. |
| 492 | */ |
| 493 | if (start >= max_low_pfn) |
| 494 | continue; |
| 495 | if (start < reserved_end) |
| 496 | start = reserved_end; |
| 497 | if (end > max_low_pfn) |
| 498 | end = max_low_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
| 500 | /* |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 501 | * ... finally, is the area going away? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | */ |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 503 | if (end <= start) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | continue; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 505 | size = end - start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
| 507 | /* Register lowmem ranges */ |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 508 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
| 509 | memory_present(0, start, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
| 511 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 512 | /* |
| 513 | * Reserve the bootmap memory. |
| 514 | */ |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 515 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 516 | |
Matt Redfearn | 61cd52d | 2016-03-31 10:05:38 +0100 | [diff] [blame] | 517 | #ifdef CONFIG_RELOCATABLE |
| 518 | /* |
| 519 | * The kernel reserves all memory below its _end symbol as bootmem, |
| 520 | * but the kernel may now be at a much higher address. The memory |
| 521 | * between the original and new locations may be returned to the system. |
| 522 | */ |
| 523 | if (__pa_symbol(_text) > __pa_symbol(VMLINUX_LOAD_ADDRESS)) { |
| 524 | unsigned long offset; |
Matt Redfearn | 919beb4 | 2016-03-31 10:05:42 +0100 | [diff] [blame] | 525 | extern void show_kernel_relocation(const char *level); |
Matt Redfearn | 61cd52d | 2016-03-31 10:05:38 +0100 | [diff] [blame] | 526 | |
| 527 | offset = __pa_symbol(_text) - __pa_symbol(VMLINUX_LOAD_ADDRESS); |
| 528 | free_bootmem(__pa_symbol(VMLINUX_LOAD_ADDRESS), offset); |
Matt Redfearn | 919beb4 | 2016-03-31 10:05:42 +0100 | [diff] [blame] | 529 | |
| 530 | #if defined(CONFIG_DEBUG_KERNEL) && defined(CONFIG_DEBUG_INFO) |
| 531 | /* |
| 532 | * This information is necessary when debugging the kernel |
| 533 | * But is a security vulnerability otherwise! |
| 534 | */ |
| 535 | show_kernel_relocation(KERN_INFO); |
| 536 | #endif |
Matt Redfearn | 61cd52d | 2016-03-31 10:05:38 +0100 | [diff] [blame] | 537 | } |
| 538 | #endif |
| 539 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 540 | /* |
| 541 | * Reserve initrd memory if needed. |
| 542 | */ |
| 543 | finalize_initrd(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } |
| 545 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 546 | #endif /* CONFIG_SGI_IP27 */ |
| 547 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 548 | /* |
Joe Perches | 603e82e | 2008-02-03 16:54:53 +0200 | [diff] [blame] | 549 | * arch_mem_init - initialize memory management subsystem |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 550 | * |
| 551 | * o plat_mem_setup() detects the memory configuration and will record detected |
| 552 | * memory areas using add_memory_region. |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 553 | * |
| 554 | * 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] | 555 | * kernel but generic memory management system is still entirely uninitialized. |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 556 | * |
| 557 | * o bootmem_init() |
| 558 | * o sparse_init() |
| 559 | * o paging_init() |
Masahiro Yamada | e1c0506 | 2015-07-07 10:14:59 +0900 | [diff] [blame] | 560 | * o dma_contiguous_reserve() |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 561 | * |
| 562 | * At this stage the bootmem allocator is ready to use. |
| 563 | * |
| 564 | * NOTE: historically plat_mem_setup did the entire platform initialization. |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 565 | * This was rather impractical because it meant plat_mem_setup had to |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 566 | * get away without any kind of memory allocator. To keep old code from |
Rafał Miłecki | 7f0dd76 | 2014-09-03 07:36:51 +0200 | [diff] [blame] | 567 | * breaking plat_setup was just renamed to plat_mem_setup and a second platform |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 568 | * initialization hook for anything else was introduced. |
| 569 | */ |
| 570 | |
Ralf Baechle | 982f6ff | 2009-09-17 02:25:07 +0200 | [diff] [blame] | 571 | static int usermem __initdata; |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 572 | |
| 573 | static int __init early_parse_mem(char *p) |
| 574 | { |
Jaedon Shin | ad8f723 | 2014-12-12 19:51:15 +0100 | [diff] [blame] | 575 | phys_addr_t start, size; |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 576 | |
| 577 | /* |
| 578 | * If a user specifies memory size, we |
| 579 | * blow away any automatically generated |
| 580 | * size. |
| 581 | */ |
| 582 | if (usermem == 0) { |
| 583 | boot_mem_map.nr_map = 0; |
| 584 | usermem = 1; |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 585 | } |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 586 | start = 0; |
| 587 | size = memparse(p, &p); |
| 588 | if (*p == '@') |
| 589 | start = memparse(p + 1, &p); |
| 590 | |
| 591 | add_memory_region(start, size, BOOT_MEM_RAM); |
| 592 | return 0; |
| 593 | } |
| 594 | early_param("mem", early_parse_mem); |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 595 | |
Corey Minyard | 4893fc8 | 2013-02-12 19:41:48 +0000 | [diff] [blame] | 596 | #ifdef CONFIG_PROC_VMCORE |
| 597 | unsigned long setup_elfcorehdr, setup_elfcorehdr_size; |
| 598 | static int __init early_parse_elfcorehdr(char *p) |
| 599 | { |
| 600 | int i; |
| 601 | |
| 602 | setup_elfcorehdr = memparse(p, &p); |
| 603 | |
| 604 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 605 | unsigned long start = boot_mem_map.map[i].addr; |
| 606 | unsigned long end = (boot_mem_map.map[i].addr + |
| 607 | boot_mem_map.map[i].size); |
| 608 | if (setup_elfcorehdr >= start && setup_elfcorehdr < end) { |
| 609 | /* |
| 610 | * Reserve from the elf core header to the end of |
| 611 | * the memory segment, that should all be kdump |
| 612 | * reserved memory. |
| 613 | */ |
| 614 | setup_elfcorehdr_size = end - setup_elfcorehdr; |
| 615 | break; |
| 616 | } |
| 617 | } |
| 618 | /* |
| 619 | * If we don't find it in the memory map, then we shouldn't |
| 620 | * have to worry about it, as the new kernel won't use it. |
| 621 | */ |
| 622 | return 0; |
| 623 | } |
| 624 | early_param("elfcorehdr", early_parse_elfcorehdr); |
| 625 | #endif |
| 626 | |
Ralf Baechle | 15d45cc | 2014-11-22 00:22:09 +0100 | [diff] [blame] | 627 | static void __init arch_mem_addpart(phys_addr_t mem, phys_addr_t end, int type) |
Corey Minyard | d3ff933 | 2013-02-12 19:41:47 +0000 | [diff] [blame] | 628 | { |
Ralf Baechle | 15d45cc | 2014-11-22 00:22:09 +0100 | [diff] [blame] | 629 | phys_addr_t size; |
Corey Minyard | d3ff933 | 2013-02-12 19:41:47 +0000 | [diff] [blame] | 630 | int i; |
| 631 | |
| 632 | size = end - mem; |
| 633 | if (!size) |
| 634 | return; |
| 635 | |
| 636 | /* Make sure it is in the boot_mem_map */ |
| 637 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 638 | if (mem >= boot_mem_map.map[i].addr && |
| 639 | mem < (boot_mem_map.map[i].addr + |
| 640 | boot_mem_map.map[i].size)) |
| 641 | return; |
| 642 | } |
| 643 | add_memory_region(mem, size, type); |
| 644 | } |
| 645 | |
Prem Mallappa | c2882b7 | 2013-09-04 23:26:24 +0530 | [diff] [blame] | 646 | #ifdef CONFIG_KEXEC |
| 647 | static inline unsigned long long get_total_mem(void) |
| 648 | { |
| 649 | unsigned long long total; |
| 650 | |
| 651 | total = max_pfn - min_low_pfn; |
| 652 | return total << PAGE_SHIFT; |
| 653 | } |
| 654 | |
| 655 | static void __init mips_parse_crashkernel(void) |
| 656 | { |
| 657 | unsigned long long total_mem; |
| 658 | unsigned long long crash_size, crash_base; |
| 659 | int ret; |
| 660 | |
| 661 | total_mem = get_total_mem(); |
| 662 | ret = parse_crashkernel(boot_command_line, total_mem, |
| 663 | &crash_size, &crash_base); |
| 664 | if (ret != 0 || crash_size <= 0) |
| 665 | return; |
| 666 | |
| 667 | crashk_res.start = crash_base; |
| 668 | crashk_res.end = crash_base + crash_size - 1; |
| 669 | } |
| 670 | |
| 671 | static void __init request_crashkernel(struct resource *res) |
| 672 | { |
| 673 | int ret; |
| 674 | |
| 675 | ret = request_resource(res, &crashk_res); |
| 676 | if (!ret) |
| 677 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", |
| 678 | (unsigned long)((crashk_res.end - |
| 679 | crashk_res.start + 1) >> 20), |
| 680 | (unsigned long)(crashk_res.start >> 20)); |
| 681 | } |
| 682 | #else /* !defined(CONFIG_KEXEC) */ |
| 683 | static void __init mips_parse_crashkernel(void) |
| 684 | { |
| 685 | } |
| 686 | |
| 687 | static void __init request_crashkernel(struct resource *res) |
| 688 | { |
| 689 | } |
| 690 | #endif /* !defined(CONFIG_KEXEC) */ |
| 691 | |
Jonas Gorski | 2024972 | 2015-10-12 13:13:02 +0200 | [diff] [blame] | 692 | #define USE_PROM_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER) |
| 693 | #define USE_DTB_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) |
Jaedon Shin | 2549cc9 | 2015-12-21 12:47:35 +0900 | [diff] [blame] | 694 | #define EXTEND_WITH_PROM IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) |
Rabin Vincent | ed47e15 | 2016-04-28 11:03:09 +0200 | [diff] [blame] | 695 | #define BUILTIN_EXTEND_WITH_PROM \ |
| 696 | IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND) |
Jonas Gorski | 2024972 | 2015-10-12 13:13:02 +0200 | [diff] [blame] | 697 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 698 | static void __init arch_mem_init(char **cmdline_p) |
| 699 | { |
Zubair Lutfullah Kakakhel | f464938 | 2014-07-16 16:51:32 +0100 | [diff] [blame] | 700 | struct memblock_region *reg; |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 701 | extern void plat_mem_setup(void); |
| 702 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 703 | /* call board setup routine */ |
| 704 | plat_mem_setup(); |
| 705 | |
Corey Minyard | d3ff933 | 2013-02-12 19:41:47 +0000 | [diff] [blame] | 706 | /* |
| 707 | * Make sure all kernel memory is in the maps. The "UP" and |
| 708 | * "DOWN" are opposite for initdata since if it crosses over |
| 709 | * into another memory section you don't want that to be |
| 710 | * freed when the initdata is freed. |
| 711 | */ |
| 712 | arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT, |
| 713 | PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT, |
| 714 | BOOT_MEM_RAM); |
| 715 | arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT, |
| 716 | PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT, |
| 717 | BOOT_MEM_INIT_RAM); |
David Daney | 43064c0 | 2011-11-22 14:38:03 +0000 | [diff] [blame] | 718 | |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 719 | pr_info("Determined physical RAM map:\n"); |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 720 | print_memory_map(); |
| 721 | |
Jonas Gorski | 2024972 | 2015-10-12 13:13:02 +0200 | [diff] [blame] | 722 | #if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE) |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 723 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
| 724 | #else |
Jonas Gorski | 2024972 | 2015-10-12 13:13:02 +0200 | [diff] [blame] | 725 | if ((USE_PROM_CMDLINE && arcs_cmdline[0]) || |
| 726 | (USE_DTB_CMDLINE && !boot_command_line[0])) |
| 727 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); |
| 728 | |
| 729 | if (EXTEND_WITH_PROM && arcs_cmdline[0]) { |
Rabin Vincent | e54ad8c | 2016-04-28 11:03:08 +0200 | [diff] [blame] | 730 | if (boot_command_line[0]) |
| 731 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); |
Jonas Gorski | 2024972 | 2015-10-12 13:13:02 +0200 | [diff] [blame] | 732 | strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 733 | } |
Jonas Gorski | 2024972 | 2015-10-12 13:13:02 +0200 | [diff] [blame] | 734 | |
| 735 | #if defined(CONFIG_CMDLINE_BOOL) |
| 736 | if (builtin_cmdline[0]) { |
Rabin Vincent | e54ad8c | 2016-04-28 11:03:08 +0200 | [diff] [blame] | 737 | if (boot_command_line[0]) |
| 738 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); |
Jonas Gorski | 2024972 | 2015-10-12 13:13:02 +0200 | [diff] [blame] | 739 | strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
| 740 | } |
Rabin Vincent | ed47e15 | 2016-04-28 11:03:09 +0200 | [diff] [blame] | 741 | |
| 742 | if (BUILTIN_EXTEND_WITH_PROM && arcs_cmdline[0]) { |
| 743 | if (boot_command_line[0]) |
| 744 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); |
| 745 | strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); |
| 746 | } |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 747 | #endif |
Dmitri Vorobiev | 6acc7d4 | 2009-11-21 22:34:41 +0200 | [diff] [blame] | 748 | #endif |
| 749 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 750 | |
| 751 | *cmdline_p = command_line; |
| 752 | |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 753 | parse_early_param(); |
| 754 | |
| 755 | if (usermem) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 756 | pr_info("User-defined physical RAM map:\n"); |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 757 | print_memory_map(); |
| 758 | } |
| 759 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 760 | bootmem_init(); |
Corey Minyard | 4893fc8 | 2013-02-12 19:41:48 +0000 | [diff] [blame] | 761 | #ifdef CONFIG_PROC_VMCORE |
| 762 | if (setup_elfcorehdr && setup_elfcorehdr_size) { |
| 763 | printk(KERN_INFO "kdump reserved memory at %lx-%lx\n", |
| 764 | setup_elfcorehdr, setup_elfcorehdr_size); |
| 765 | reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size, |
| 766 | BOOTMEM_DEFAULT); |
| 767 | } |
| 768 | #endif |
Prem Mallappa | c2882b7 | 2013-09-04 23:26:24 +0530 | [diff] [blame] | 769 | |
| 770 | mips_parse_crashkernel(); |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 771 | #ifdef CONFIG_KEXEC |
| 772 | if (crashk_res.start != crashk_res.end) |
| 773 | reserve_bootmem(crashk_res.start, |
| 774 | crashk_res.end - crashk_res.start + 1, |
| 775 | BOOTMEM_DEFAULT); |
| 776 | #endif |
Dezhong Diao | f2ffa5a | 2010-10-13 00:52:46 -0600 | [diff] [blame] | 777 | device_tree_init(); |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 778 | sparse_init(); |
David Daney | ee71b7d | 2010-10-01 13:27:33 -0700 | [diff] [blame] | 779 | plat_swiotlb_setup(); |
Zubair Lutfullah Kakakhel | f464938 | 2014-07-16 16:51:32 +0100 | [diff] [blame] | 780 | |
| 781 | dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); |
| 782 | /* Tell bootmem about cma reserved memblock section */ |
| 783 | for_each_memblock(reserved, reg) |
Zubair Lutfullah Kakakhel | 30fa053 | 2014-10-28 11:28:34 +0000 | [diff] [blame] | 784 | if (reg->size != 0) |
| 785 | reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); |
Huacai Chen | a95d069 | 2016-03-17 20:37:10 +0800 | [diff] [blame] | 786 | |
| 787 | reserve_bootmem_region(__pa_symbol(&__nosave_begin), |
| 788 | __pa_symbol(&__nosave_end)); /* Reserve for hibernation */ |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 789 | } |
| 790 | |
Franck Bui-Huu | 8df32c6 | 2006-08-11 17:51:51 +0200 | [diff] [blame] | 791 | static void __init resource_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | { |
| 793 | int i; |
| 794 | |
Ralf Baechle | 6adb5fe | 2006-06-20 12:47:53 +0100 | [diff] [blame] | 795 | if (UNCAC_BASE != IO_BASE) |
| 796 | return; |
| 797 | |
Franck Bui-Huu | f5bffe3 | 2006-10-19 13:20:03 +0200 | [diff] [blame] | 798 | code_resource.start = __pa_symbol(&_text); |
| 799 | code_resource.end = __pa_symbol(&_etext) - 1; |
| 800 | data_resource.start = __pa_symbol(&_etext); |
| 801 | data_resource.end = __pa_symbol(&_edata) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 804 | struct resource *res; |
| 805 | unsigned long start, end; |
| 806 | |
| 807 | start = boot_mem_map.map[i].addr; |
| 808 | 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] | 809 | if (start >= HIGHMEM_START) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | continue; |
Franck Bui-Huu | 1c6fd44 | 2006-08-11 17:51:52 +0200 | [diff] [blame] | 811 | if (end >= HIGHMEM_START) |
| 812 | end = HIGHMEM_START - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
| 814 | res = alloc_bootmem(sizeof(struct resource)); |
Toshi Kani | 35d98e9 | 2016-01-26 21:57:22 +0100 | [diff] [blame] | 815 | |
| 816 | res->start = start; |
| 817 | res->end = end; |
| 818 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 819 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | switch (boot_mem_map.map[i].type) { |
| 821 | case BOOT_MEM_RAM: |
David Daney | 43064c0 | 2011-11-22 14:38:03 +0000 | [diff] [blame] | 822 | case BOOT_MEM_INIT_RAM: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | case BOOT_MEM_ROM_DATA: |
| 824 | res->name = "System RAM"; |
Toshi Kani | 35d98e9 | 2016-01-26 21:57:22 +0100 | [diff] [blame] | 825 | res->flags |= IORESOURCE_SYSRAM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | break; |
| 827 | case BOOT_MEM_RESERVED: |
| 828 | default: |
| 829 | res->name = "reserved"; |
| 830 | } |
| 831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | request_resource(&iomem_resource, res); |
| 833 | |
| 834 | /* |
| 835 | * We don't know which RAM region contains kernel data, |
| 836 | * so we try it repeatedly and let the resource manager |
| 837 | * test it. |
| 838 | */ |
| 839 | request_resource(res, &code_resource); |
| 840 | request_resource(res, &data_resource); |
Ralf Baechle | 7aa1c8f | 2012-10-11 18:14:58 +0200 | [diff] [blame] | 841 | request_crashkernel(res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | } |
| 843 | } |
| 844 | |
Huacai Chen | 0f3f506 | 2014-06-26 11:41:25 +0800 | [diff] [blame] | 845 | #ifdef CONFIG_SMP |
| 846 | static void __init prefill_possible_map(void) |
| 847 | { |
| 848 | int i, possible = num_possible_cpus(); |
| 849 | |
| 850 | if (possible > nr_cpu_ids) |
| 851 | possible = nr_cpu_ids; |
| 852 | |
| 853 | for (i = 0; i < possible; i++) |
| 854 | set_cpu_possible(i, true); |
| 855 | for (; i < NR_CPUS; i++) |
| 856 | set_cpu_possible(i, false); |
| 857 | |
| 858 | nr_cpu_ids = possible; |
| 859 | } |
| 860 | #else |
| 861 | static inline void prefill_possible_map(void) {} |
| 862 | #endif |
| 863 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | void __init setup_arch(char **cmdline_p) |
| 865 | { |
| 866 | cpu_probe(); |
Paul Burton | 3af5a67 | 2016-02-08 09:46:31 -0800 | [diff] [blame] | 867 | mips_cm_probe(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | prom_init(); |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 869 | |
James Hogan | e934945 | 2015-01-29 11:14:13 +0000 | [diff] [blame] | 870 | setup_early_fdc_console(); |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 871 | #ifdef CONFIG_EARLY_PRINTK |
Dmitri Vorobiev | 07cdb78 | 2008-05-29 17:57:08 +0300 | [diff] [blame] | 872 | setup_early_printk(); |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 873 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | cpu_report(); |
Maciej W. Rozycki | 20d60d9 | 2007-10-23 12:43:11 +0100 | [diff] [blame] | 875 | check_bugs_early(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | |
| 877 | #if defined(CONFIG_VT) |
| 878 | #if defined(CONFIG_VGA_CONSOLE) |
Ralf Baechle | e0daad4 | 2007-02-05 00:10:11 +0000 | [diff] [blame] | 879 | conswitchp = &vga_con; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | #elif defined(CONFIG_DUMMY_CONSOLE) |
Ralf Baechle | e0daad4 | 2007-02-05 00:10:11 +0000 | [diff] [blame] | 881 | conswitchp = &dummy_con; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | #endif |
| 883 | #endif |
| 884 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 885 | arch_mem_init(cmdline_p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | resource_init(); |
Ralf Baechle | 9b6695a | 2006-02-23 12:23:27 +0000 | [diff] [blame] | 888 | plat_smp_setup(); |
Huacai Chen | 0f3f506 | 2014-06-26 11:41:25 +0800 | [diff] [blame] | 889 | prefill_possible_map(); |
David Daney | 6650df3 | 2012-05-15 00:04:50 -0700 | [diff] [blame] | 890 | |
| 891 | cpu_cache_init(); |
Paul Burton | 058effe | 2016-09-02 15:17:31 +0100 | [diff] [blame] | 892 | paging_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | } |
| 894 | |
Atsushi Nemoto | 69a6c31 | 2007-01-24 01:21:05 +0900 | [diff] [blame] | 895 | unsigned long kernelsp[NR_CPUS]; |
| 896 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; |
Atsushi Nemoto | 6312e0e | 2007-06-30 00:55:48 +0900 | [diff] [blame] | 897 | |
Jonas Gorski | 15f37e1 | 2016-06-20 11:27:37 +0200 | [diff] [blame] | 898 | #ifdef CONFIG_USE_OF |
| 899 | unsigned long fw_passed_dtb; |
| 900 | #endif |
| 901 | |
Atsushi Nemoto | 6312e0e | 2007-06-30 00:55:48 +0900 | [diff] [blame] | 902 | #ifdef CONFIG_DEBUG_FS |
| 903 | struct dentry *mips_debugfs_dir; |
| 904 | static int __init debugfs_mips(void) |
| 905 | { |
| 906 | struct dentry *d; |
| 907 | |
| 908 | d = debugfs_create_dir("mips", NULL); |
Zhaolei | b517531 | 2008-10-17 19:12:35 +0800 | [diff] [blame] | 909 | if (!d) |
| 910 | return -ENOMEM; |
Atsushi Nemoto | 6312e0e | 2007-06-30 00:55:48 +0900 | [diff] [blame] | 911 | mips_debugfs_dir = d; |
| 912 | return 0; |
| 913 | } |
| 914 | arch_initcall(debugfs_mips); |
| 915 | #endif |