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. |
Maciej W. Rozycki | 20d60d9 | 2007-10-23 12:43:11 +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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/module.h> |
Jon Smirl | 894673e | 2006-07-10 04:44:13 -0700 | [diff] [blame] | 16 | #include <linux/screen_info.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/bootmem.h> |
| 18 | #include <linux/initrd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/root_dev.h> |
| 20 | #include <linux/highmem.h> |
| 21 | #include <linux/console.h> |
Dave Hansen | 22a9835 | 2006-03-27 01:16:04 -0800 | [diff] [blame] | 22 | #include <linux/pfn.h> |
Atsushi Nemoto | 6312e0e | 2007-06-30 00:55:48 +0900 | [diff] [blame] | 23 | #include <linux/debugfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | #include <asm/addrspace.h> |
| 26 | #include <asm/bootinfo.h> |
Maciej W. Rozycki | 20d60d9 | 2007-10-23 12:43:11 +0100 | [diff] [blame] | 27 | #include <asm/bugs.h> |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 28 | #include <asm/cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <asm/cpu.h> |
| 30 | #include <asm/sections.h> |
| 31 | #include <asm/setup.h> |
Ralf Baechle | 87353d8 | 2007-11-19 12:23:51 +0000 | [diff] [blame] | 32 | #include <asm/smp-ops.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <asm/system.h> |
| 34 | |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 35 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | EXPORT_SYMBOL(cpu_data); |
| 38 | |
| 39 | #ifdef CONFIG_VT |
| 40 | struct screen_info screen_info; |
| 41 | #endif |
| 42 | |
| 43 | /* |
| 44 | * Despite it's name this variable is even if we don't have PCI |
| 45 | */ |
| 46 | unsigned int PCI_DMA_BUS_IS_PHYS; |
| 47 | |
| 48 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); |
| 49 | |
| 50 | /* |
| 51 | * Setup information |
| 52 | * |
| 53 | * These are initialized so they are in the .data section |
| 54 | */ |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 55 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | EXPORT_SYMBOL(mips_machtype); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | struct boot_mem_map boot_mem_map; |
| 60 | |
Dmitri Vorobiev | 7580c9c | 2009-10-13 23:43:24 +0300 | [diff] [blame] | 61 | static char command_line[COMMAND_LINE_SIZE]; |
| 62 | char arcs_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | /* |
| 65 | * mips_io_port_base is the begin of the address space to which x86 style |
| 66 | * I/O ports are mapped. |
| 67 | */ |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 68 | const unsigned long mips_io_port_base __read_mostly = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | EXPORT_SYMBOL(mips_io_port_base); |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | static struct resource code_resource = { .name = "Kernel code", }; |
| 72 | static struct resource data_resource = { .name = "Kernel data", }; |
| 73 | |
| 74 | void __init add_memory_region(phys_t start, phys_t size, long type) |
| 75 | { |
| 76 | int x = boot_mem_map.nr_map; |
| 77 | struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1; |
| 78 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 79 | /* Sanity check */ |
| 80 | if (start + size < start) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 81 | pr_warning("Trying to add an invalid memory region, skipped\n"); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 82 | return; |
| 83 | } |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | /* |
| 86 | * Try to merge with previous entry if any. This is far less than |
| 87 | * perfect but is sufficient for most real world cases. |
| 88 | */ |
| 89 | if (x && prev->addr + prev->size == start && prev->type == type) { |
| 90 | prev->size += size; |
| 91 | return; |
| 92 | } |
| 93 | |
| 94 | if (x == BOOT_MEM_MAP_MAX) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 95 | pr_err("Ooops! Too many entries in the memory map!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | return; |
| 97 | } |
| 98 | |
| 99 | boot_mem_map.map[x].addr = start; |
| 100 | boot_mem_map.map[x].size = size; |
| 101 | boot_mem_map.map[x].type = type; |
| 102 | boot_mem_map.nr_map++; |
| 103 | } |
| 104 | |
| 105 | static void __init print_memory_map(void) |
| 106 | { |
| 107 | int i; |
| 108 | const int field = 2 * sizeof(unsigned long); |
| 109 | |
| 110 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 111 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | field, (unsigned long long) boot_mem_map.map[i].size, |
| 113 | field, (unsigned long long) boot_mem_map.map[i].addr); |
| 114 | |
| 115 | switch (boot_mem_map.map[i].type) { |
| 116 | case BOOT_MEM_RAM: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 117 | printk(KERN_CONT "(usable)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | break; |
| 119 | case BOOT_MEM_ROM_DATA: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 120 | printk(KERN_CONT "(ROM data)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | break; |
| 122 | case BOOT_MEM_RESERVED: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 123 | printk(KERN_CONT "(reserved)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | break; |
| 125 | default: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 126 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | break; |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 132 | /* |
| 133 | * Manage initrd |
| 134 | */ |
| 135 | #ifdef CONFIG_BLK_DEV_INITRD |
| 136 | |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 137 | static int __init rd_start_early(char *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 139 | unsigned long start = memparse(p, &p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 141 | #ifdef CONFIG_64BIT |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 142 | /* Guess if the sign extension was forgotten by bootloader */ |
| 143 | if (start < XKPHYS) |
| 144 | start = (int)start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | #endif |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 146 | initrd_start = start; |
| 147 | initrd_end += start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | return 0; |
| 149 | } |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 150 | early_param("rd_start", rd_start_early); |
| 151 | |
| 152 | static int __init rd_size_early(char *p) |
| 153 | { |
| 154 | initrd_end += memparse(p, &p); |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 155 | return 0; |
| 156 | } |
| 157 | early_param("rd_size", rd_size_early); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 159 | /* it returns the next free pfn after initrd */ |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 160 | static unsigned long __init init_initrd(void) |
| 161 | { |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 162 | unsigned long end; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 163 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 164 | /* |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 165 | * Board specific code or command line parser should have |
| 166 | * already set up initrd_start and initrd_end. In these cases |
| 167 | * perfom sanity checks and use them if all looks good. |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 168 | */ |
Ralf Baechle | 32028f1 | 2009-12-17 01:57:07 +0000 | [diff] [blame^] | 169 | if (!initrd_start || initrd_end <= initrd_start) |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 170 | goto disable; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 171 | |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 172 | if (initrd_start & ~PAGE_MASK) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 173 | pr_err("initrd start must be page aligned\n"); |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 174 | goto disable; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 175 | } |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 176 | if (initrd_start < PAGE_OFFSET) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 177 | pr_err("initrd start < PAGE_OFFSET\n"); |
Franck Bui-Huu | a7837b7 | 2006-10-19 13:20:04 +0200 | [diff] [blame] | 178 | goto disable; |
| 179 | } |
| 180 | |
| 181 | /* |
| 182 | * Sanitize initrd addresses. For example firmware |
| 183 | * can't guess if they need to pass them through |
| 184 | * 64-bits values if the kernel has been built in pure |
| 185 | * 32-bit. We need also to switch from KSEG0 to XKPHYS |
| 186 | * addresses now, so the code can now safely use __pa(). |
| 187 | */ |
| 188 | end = __pa(initrd_end); |
| 189 | initrd_end = (unsigned long)__va(end); |
| 190 | initrd_start = (unsigned long)__va(__pa(initrd_start)); |
| 191 | |
| 192 | ROOT_DEV = Root_RAM0; |
| 193 | return PFN_UP(end); |
| 194 | disable: |
| 195 | initrd_start = 0; |
| 196 | initrd_end = 0; |
| 197 | return 0; |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | static void __init finalize_initrd(void) |
| 201 | { |
| 202 | unsigned long size = initrd_end - initrd_start; |
| 203 | |
| 204 | if (size == 0) { |
| 205 | printk(KERN_INFO "Initrd not found or empty"); |
| 206 | goto disable; |
| 207 | } |
Franck Bui-Huu | d4df6d4 | 2006-10-19 13:20:01 +0200 | [diff] [blame] | 208 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 209 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 210 | goto disable; |
| 211 | } |
| 212 | |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 213 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 214 | initrd_below_start_ok = 1; |
| 215 | |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 216 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
| 217 | initrd_start, size); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 218 | return; |
| 219 | disable: |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 220 | printk(KERN_CONT " - disabling initrd\n"); |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 221 | initrd_start = 0; |
| 222 | initrd_end = 0; |
| 223 | } |
| 224 | |
| 225 | #else /* !CONFIG_BLK_DEV_INITRD */ |
| 226 | |
Ralf Baechle | 9ba126c | 2006-10-13 11:22:52 +0100 | [diff] [blame] | 227 | static unsigned long __init init_initrd(void) |
| 228 | { |
| 229 | return 0; |
| 230 | } |
| 231 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 232 | #define finalize_initrd() do {} while (0) |
| 233 | |
| 234 | #endif |
| 235 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 236 | /* |
| 237 | * Initialize the bootmem allocator. It also setup initrd related data |
| 238 | * if needed. |
| 239 | */ |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 240 | #ifdef CONFIG_SGI_IP27 |
| 241 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 242 | static void __init bootmem_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | { |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 244 | init_initrd(); |
| 245 | finalize_initrd(); |
| 246 | } |
| 247 | |
| 248 | #else /* !CONFIG_SGI_IP27 */ |
| 249 | |
| 250 | static void __init bootmem_init(void) |
| 251 | { |
Atsushi Nemoto | e452e94 | 2008-01-08 00:41:13 +0900 | [diff] [blame] | 252 | unsigned long reserved_end; |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 253 | unsigned long mapstart = ~0UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | unsigned long bootmap_size; |
| 255 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 257 | /* |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 258 | * Init any data related to initrd. It's a nop if INITRD is |
| 259 | * not selected. Once that done we can determine the low bound |
| 260 | * of usable memory. |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 261 | */ |
Ralf Baechle | 12e22e8 | 2009-03-30 14:49:41 +0200 | [diff] [blame] | 262 | reserved_end = max(init_initrd(), |
| 263 | (unsigned long) PFN_UP(__pa_symbol(&_end))); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 264 | |
| 265 | /* |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 266 | * max_low_pfn is not a number of pages. The number of pages |
| 267 | * of the system is given by 'max_low_pfn - min_low_pfn'. |
| 268 | */ |
| 269 | min_low_pfn = ~0UL; |
| 270 | max_low_pfn = 0; |
| 271 | |
| 272 | /* |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 273 | * Find the highest page frame number we have available. |
| 274 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 276 | unsigned long start, end; |
| 277 | |
| 278 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) |
| 279 | continue; |
| 280 | |
| 281 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 282 | end = PFN_DOWN(boot_mem_map.map[i].addr |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 283 | + boot_mem_map.map[i].size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 285 | if (end > max_low_pfn) |
| 286 | max_low_pfn = end; |
| 287 | if (start < min_low_pfn) |
| 288 | min_low_pfn = start; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 289 | if (end <= reserved_end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | continue; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 291 | if (start >= mapstart) |
| 292 | continue; |
| 293 | mapstart = max(reserved_end, start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
| 295 | |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 296 | if (min_low_pfn >= max_low_pfn) |
| 297 | panic("Incorrect memory mapping !!!"); |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 298 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 299 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
| 300 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), |
| 301 | min_low_pfn - ARCH_PFN_OFFSET); |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 302 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 303 | pr_info("%lu free pages won't be used\n", |
| 304 | ARCH_PFN_OFFSET - min_low_pfn); |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 305 | } |
Franck Bui-Huu | 6f284a2 | 2007-01-10 09:44:05 +0100 | [diff] [blame] | 306 | min_low_pfn = ARCH_PFN_OFFSET; |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | /* |
| 309 | * Determine low and high memory ranges |
| 310 | */ |
Ralf Baechle | dc3bf35 | 2008-04-18 10:56:07 +0100 | [diff] [blame] | 311 | max_pfn = max_low_pfn; |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 312 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | #ifdef CONFIG_HIGHMEM |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 314 | highstart_pfn = PFN_DOWN(HIGHMEM_START); |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 315 | highend_pfn = max_low_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | #endif |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 317 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 318 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 320 | /* |
| 321 | * Initialize the boot-time allocator with low memory only. |
| 322 | */ |
Franck Bui-Huu | db84dc6 | 2007-01-10 09:44:04 +0100 | [diff] [blame] | 323 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
| 324 | min_low_pfn, max_low_pfn); |
Ralf Baechle | cce335ae | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 325 | |
| 326 | |
Ralf Baechle | cce335ae | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 327 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 328 | unsigned long start, end; |
| 329 | |
| 330 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 331 | end = PFN_DOWN(boot_mem_map.map[i].addr |
| 332 | + boot_mem_map.map[i].size); |
| 333 | |
Atsushi Nemoto | e452e94 | 2008-01-08 00:41:13 +0900 | [diff] [blame] | 334 | if (start <= min_low_pfn) |
| 335 | start = min_low_pfn; |
Ralf Baechle | cce335ae | 2007-11-03 02:05:43 +0000 | [diff] [blame] | 336 | if (start >= end) |
| 337 | continue; |
| 338 | |
| 339 | #ifndef CONFIG_HIGHMEM |
| 340 | if (end > max_low_pfn) |
| 341 | end = max_low_pfn; |
| 342 | |
| 343 | /* |
| 344 | * ... finally, is the area going away? |
| 345 | */ |
| 346 | if (end <= start) |
| 347 | continue; |
| 348 | #endif |
| 349 | |
| 350 | add_active_range(0, start, end); |
| 351 | } |
| 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | /* |
| 354 | * Register fully available low RAM pages with the bootmem allocator. |
| 355 | */ |
| 356 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 357 | unsigned long start, end, size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
| 359 | /* |
| 360 | * Reserve usable memory. |
| 361 | */ |
| 362 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) |
| 363 | continue; |
| 364 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 365 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 366 | end = PFN_DOWN(boot_mem_map.map[i].addr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | + boot_mem_map.map[i].size); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 368 | /* |
| 369 | * We are rounding up the start address of usable memory |
| 370 | * and at the end of the usable range downwards. |
| 371 | */ |
| 372 | if (start >= max_low_pfn) |
| 373 | continue; |
| 374 | if (start < reserved_end) |
| 375 | start = reserved_end; |
| 376 | if (end > max_low_pfn) |
| 377 | end = max_low_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
| 379 | /* |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 380 | * ... finally, is the area going away? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | */ |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 382 | if (end <= start) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | continue; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 384 | size = end - start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
| 386 | /* Register lowmem ranges */ |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 387 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
| 388 | memory_present(0, start, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | } |
| 390 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 391 | /* |
| 392 | * Reserve the bootmap memory. |
| 393 | */ |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 394 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame] | 395 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 396 | /* |
| 397 | * Reserve initrd memory if needed. |
| 398 | */ |
| 399 | finalize_initrd(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | } |
| 401 | |
Franck Bui-Huu | d2043ca | 2006-08-11 17:51:49 +0200 | [diff] [blame] | 402 | #endif /* CONFIG_SGI_IP27 */ |
| 403 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 404 | /* |
Joe Perches | 603e82e | 2008-02-03 16:54:53 +0200 | [diff] [blame] | 405 | * arch_mem_init - initialize memory management subsystem |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 406 | * |
| 407 | * o plat_mem_setup() detects the memory configuration and will record detected |
| 408 | * memory areas using add_memory_region. |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 409 | * |
| 410 | * 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] | 411 | * kernel but generic memory management system is still entirely uninitialized. |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 412 | * |
| 413 | * o bootmem_init() |
| 414 | * o sparse_init() |
| 415 | * o paging_init() |
| 416 | * |
| 417 | * At this stage the bootmem allocator is ready to use. |
| 418 | * |
| 419 | * NOTE: historically plat_mem_setup did the entire platform initialization. |
| 420 | * This was rather impractical because it meant plat_mem_setup had to |
| 421 | * get away without any kind of memory allocator. To keep old code from |
| 422 | * breaking plat_setup was just renamed to plat_setup and a second platform |
| 423 | * initialization hook for anything else was introduced. |
| 424 | */ |
| 425 | |
Ralf Baechle | 982f6ff | 2009-09-17 02:25:07 +0200 | [diff] [blame] | 426 | static int usermem __initdata; |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 427 | |
| 428 | static int __init early_parse_mem(char *p) |
| 429 | { |
| 430 | unsigned long start, size; |
| 431 | |
| 432 | /* |
| 433 | * If a user specifies memory size, we |
| 434 | * blow away any automatically generated |
| 435 | * size. |
| 436 | */ |
| 437 | if (usermem == 0) { |
| 438 | boot_mem_map.nr_map = 0; |
| 439 | usermem = 1; |
| 440 | } |
| 441 | start = 0; |
| 442 | size = memparse(p, &p); |
| 443 | if (*p == '@') |
| 444 | start = memparse(p + 1, &p); |
| 445 | |
| 446 | add_memory_region(start, size, BOOT_MEM_RAM); |
| 447 | return 0; |
| 448 | } |
| 449 | early_param("mem", early_parse_mem); |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 450 | |
| 451 | static void __init arch_mem_init(char **cmdline_p) |
| 452 | { |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 453 | extern void plat_mem_setup(void); |
| 454 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 455 | /* call board setup routine */ |
| 456 | plat_mem_setup(); |
| 457 | |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 458 | pr_info("Determined physical RAM map:\n"); |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 459 | print_memory_map(); |
| 460 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 461 | strlcpy(command_line, arcs_cmdline, sizeof(command_line)); |
Alon Bar-Lev | 43cd346 | 2007-02-12 00:54:15 -0800 | [diff] [blame] | 462 | strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 463 | |
| 464 | *cmdline_p = command_line; |
| 465 | |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 466 | parse_early_param(); |
| 467 | |
| 468 | if (usermem) { |
Mike Crowe | a64ae7a | 2008-07-28 13:12:52 +0100 | [diff] [blame] | 469 | pr_info("User-defined physical RAM map:\n"); |
Franck Bui-Huu | a09fc44 | 2006-08-11 17:51:53 +0200 | [diff] [blame] | 470 | print_memory_map(); |
| 471 | } |
| 472 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 473 | bootmem_init(); |
| 474 | sparse_init(); |
| 475 | paging_init(); |
| 476 | } |
| 477 | |
Franck Bui-Huu | 8df32c6 | 2006-08-11 17:51:51 +0200 | [diff] [blame] | 478 | static void __init resource_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | { |
| 480 | int i; |
| 481 | |
Ralf Baechle | 6adb5fe | 2006-06-20 12:47:53 +0100 | [diff] [blame] | 482 | if (UNCAC_BASE != IO_BASE) |
| 483 | return; |
| 484 | |
Franck Bui-Huu | f5bffe3 | 2006-10-19 13:20:03 +0200 | [diff] [blame] | 485 | code_resource.start = __pa_symbol(&_text); |
| 486 | code_resource.end = __pa_symbol(&_etext) - 1; |
| 487 | data_resource.start = __pa_symbol(&_etext); |
| 488 | data_resource.end = __pa_symbol(&_edata) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | |
| 490 | /* |
| 491 | * Request address space for all standard RAM. |
| 492 | */ |
| 493 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 494 | struct resource *res; |
| 495 | unsigned long start, end; |
| 496 | |
| 497 | start = boot_mem_map.map[i].addr; |
| 498 | 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] | 499 | if (start >= HIGHMEM_START) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | continue; |
Franck Bui-Huu | 1c6fd44 | 2006-08-11 17:51:52 +0200 | [diff] [blame] | 501 | if (end >= HIGHMEM_START) |
| 502 | end = HIGHMEM_START - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
| 504 | res = alloc_bootmem(sizeof(struct resource)); |
| 505 | switch (boot_mem_map.map[i].type) { |
| 506 | case BOOT_MEM_RAM: |
| 507 | case BOOT_MEM_ROM_DATA: |
| 508 | res->name = "System RAM"; |
| 509 | break; |
| 510 | case BOOT_MEM_RESERVED: |
| 511 | default: |
| 512 | res->name = "reserved"; |
| 513 | } |
| 514 | |
| 515 | res->start = start; |
| 516 | res->end = end; |
| 517 | |
| 518 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 519 | request_resource(&iomem_resource, res); |
| 520 | |
| 521 | /* |
| 522 | * We don't know which RAM region contains kernel data, |
| 523 | * so we try it repeatedly and let the resource manager |
| 524 | * test it. |
| 525 | */ |
| 526 | request_resource(res, &code_resource); |
| 527 | request_resource(res, &data_resource); |
| 528 | } |
| 529 | } |
| 530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | void __init setup_arch(char **cmdline_p) |
| 532 | { |
| 533 | cpu_probe(); |
| 534 | prom_init(); |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 535 | |
| 536 | #ifdef CONFIG_EARLY_PRINTK |
Dmitri Vorobiev | 07cdb78 | 2008-05-29 17:57:08 +0300 | [diff] [blame] | 537 | setup_early_printk(); |
Ralf Baechle | 36a8853 | 2007-03-01 11:56:43 +0000 | [diff] [blame] | 538 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | cpu_report(); |
Maciej W. Rozycki | 20d60d9 | 2007-10-23 12:43:11 +0100 | [diff] [blame] | 540 | check_bugs_early(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | |
| 542 | #if defined(CONFIG_VT) |
| 543 | #if defined(CONFIG_VGA_CONSOLE) |
Ralf Baechle | e0daad4 | 2007-02-05 00:10:11 +0000 | [diff] [blame] | 544 | conswitchp = &vga_con; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | #elif defined(CONFIG_DUMMY_CONSOLE) |
Ralf Baechle | e0daad4 | 2007-02-05 00:10:11 +0000 | [diff] [blame] | 546 | conswitchp = &dummy_con; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | #endif |
| 548 | #endif |
| 549 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 550 | arch_mem_init(cmdline_p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | resource_init(); |
Ralf Baechle | 9b6695a | 2006-02-23 12:23:27 +0000 | [diff] [blame] | 553 | plat_smp_setup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
| 555 | |
Atsushi Nemoto | f49a747 | 2007-02-18 01:02:14 +0900 | [diff] [blame] | 556 | static int __init fpu_disable(char *s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | { |
Ralf Baechle | f088fc8 | 2006-04-05 09:45:47 +0100 | [diff] [blame] | 558 | int i; |
| 559 | |
| 560 | for (i = 0; i < NR_CPUS; i++) |
| 561 | cpu_data[i].options &= ~MIPS_CPU_FPU; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
| 563 | return 1; |
| 564 | } |
| 565 | |
| 566 | __setup("nofpu", fpu_disable); |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 567 | |
Atsushi Nemoto | f49a747 | 2007-02-18 01:02:14 +0900 | [diff] [blame] | 568 | static int __init dsp_disable(char *s) |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 569 | { |
| 570 | cpu_data[0].ases &= ~MIPS_ASE_DSP; |
| 571 | |
| 572 | return 1; |
| 573 | } |
| 574 | |
| 575 | __setup("nodsp", dsp_disable); |
Atsushi Nemoto | 69a6c31 | 2007-01-24 01:21:05 +0900 | [diff] [blame] | 576 | |
| 577 | unsigned long kernelsp[NR_CPUS]; |
| 578 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; |
Atsushi Nemoto | 6312e0e | 2007-06-30 00:55:48 +0900 | [diff] [blame] | 579 | |
| 580 | #ifdef CONFIG_DEBUG_FS |
| 581 | struct dentry *mips_debugfs_dir; |
| 582 | static int __init debugfs_mips(void) |
| 583 | { |
| 584 | struct dentry *d; |
| 585 | |
| 586 | d = debugfs_create_dir("mips", NULL); |
Zhaolei | b517531 | 2008-10-17 19:12:35 +0800 | [diff] [blame] | 587 | if (!d) |
| 588 | return -ENOMEM; |
Atsushi Nemoto | 6312e0e | 2007-06-30 00:55:48 +0900 | [diff] [blame] | 589 | mips_debugfs_dir = d; |
| 590 | return 0; |
| 591 | } |
| 592 | arch_initcall(debugfs_mips); |
| 593 | #endif |