Gennady Sharapov | ea2ba7d | 2006-01-08 01:01:31 -0800 | [diff] [blame] | 1 | /* |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 2 | * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
Jeff Dike | c5d4bb1 | 2008-02-04 22:31:14 -0800 | [diff] [blame] | 6 | #include <linux/delay.h> |
| 7 | #include <linux/init.h> |
| 8 | #include <linux/mm.h> |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/seq_file.h> |
| 11 | #include <linux/string.h> |
| 12 | #include <linux/utsname.h> |
| 13 | #include <asm/pgtable.h> |
| 14 | #include <asm/processor.h> |
| 15 | #include <asm/setup.h> |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 16 | #include "as-layout.h" |
Jeff Dike | c5d4bb1 | 2008-02-04 22:31:14 -0800 | [diff] [blame] | 17 | #include "arch.h" |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 18 | #include "init.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include "kern.h" |
Jeff Dike | edea138 | 2008-02-04 22:30:46 -0800 | [diff] [blame] | 20 | #include "kern_util.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "mem_user.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "os.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #define DEFAULT_COMMAND_LINE "root=98:0" |
| 25 | |
Jeff Dike | 1d1497e | 2007-05-06 14:51:26 -0700 | [diff] [blame] | 26 | /* Changed in add_arg and setup_arch, which run before SMP is started */ |
Alon Bar-Lev | 7a3a06d0 | 2007-02-12 00:54:26 -0800 | [diff] [blame] | 27 | static char __initdata command_line[COMMAND_LINE_SIZE] = { 0 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
Alon Bar-Lev | 7a3a06d0 | 2007-02-12 00:54:26 -0800 | [diff] [blame] | 29 | static void __init add_arg(char *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | { |
| 31 | if (strlen(command_line) + strlen(arg) + 1 > COMMAND_LINE_SIZE) { |
| 32 | printf("add_arg: Too many command line arguments!\n"); |
| 33 | exit(1); |
| 34 | } |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 35 | if (strlen(command_line) > 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | strcat(command_line, " "); |
| 37 | strcat(command_line, arg); |
| 38 | } |
| 39 | |
Jeff Dike | 1d1497e | 2007-05-06 14:51:26 -0700 | [diff] [blame] | 40 | /* |
| 41 | * These fields are initialized at boot time and not changed. |
| 42 | * XXX This structure is used only in the non-SMP case. Maybe this |
| 43 | * should be moved to smp.c. |
| 44 | */ |
| 45 | struct cpuinfo_um boot_cpu_data = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | .loops_per_jiffy = 0, |
| 47 | .ipi_pipe = { -1, -1 } |
| 48 | }; |
| 49 | |
| 50 | unsigned long thread_saved_pc(struct task_struct *task) |
| 51 | { |
Jeff Dike | 77bf440 | 2007-10-16 01:26:58 -0700 | [diff] [blame] | 52 | /* FIXME: Need to look up userspace_pid by cpu */ |
| 53 | return os_process_pc(userspace_pid[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | } |
| 55 | |
Jeff Dike | b4ffb6a | 2007-05-06 14:50:59 -0700 | [diff] [blame] | 56 | /* Changed in setup_arch, which is called in early boot */ |
| 57 | static char host_info[(__NEW_UTS_LEN + 1) * 5]; |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | static int show_cpuinfo(struct seq_file *m, void *v) |
| 60 | { |
| 61 | int index = 0; |
| 62 | |
| 63 | #ifdef CONFIG_SMP |
| 64 | index = (struct cpuinfo_um *) v - cpu_data; |
| 65 | if (!cpu_online(index)) |
| 66 | return 0; |
| 67 | #endif |
| 68 | |
| 69 | seq_printf(m, "processor\t: %d\n", index); |
| 70 | seq_printf(m, "vendor_id\t: User Mode Linux\n"); |
| 71 | seq_printf(m, "model name\t: UML\n"); |
Jeff Dike | 6aa802c | 2007-10-16 01:26:56 -0700 | [diff] [blame] | 72 | seq_printf(m, "mode\t\t: skas\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | seq_printf(m, "host\t\t: %s\n", host_info); |
| 74 | seq_printf(m, "bogomips\t: %lu.%02lu\n\n", |
| 75 | loops_per_jiffy/(500000/HZ), |
| 76 | (loops_per_jiffy/(5000/HZ)) % 100); |
| 77 | |
Jeff Dike | a5ed1ff | 2007-05-06 14:50:58 -0700 | [diff] [blame] | 78 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 82 | { |
| 83 | return *pos < NR_CPUS ? cpu_data + *pos : NULL; |
| 84 | } |
| 85 | |
| 86 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 87 | { |
| 88 | ++*pos; |
| 89 | return c_start(m, pos); |
| 90 | } |
| 91 | |
| 92 | static void c_stop(struct seq_file *m, void *v) |
| 93 | { |
| 94 | } |
| 95 | |
Jeff Dike | 5e7672e | 2006-09-27 01:50:33 -0700 | [diff] [blame] | 96 | const struct seq_operations cpuinfo_op = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | .start = c_start, |
| 98 | .next = c_next, |
| 99 | .stop = c_stop, |
| 100 | .show = show_cpuinfo, |
| 101 | }; |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /* Set in linux_main */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | unsigned long uml_physmem; |
Jeff Dike | 1d1497e | 2007-05-06 14:51:26 -0700 | [diff] [blame] | 105 | unsigned long uml_reserved; /* Also modified in mem_init */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | unsigned long start_vm; |
| 107 | unsigned long end_vm; |
Jeff Dike | 1d1497e | 2007-05-06 14:51:26 -0700 | [diff] [blame] | 108 | |
| 109 | /* Set in uml_ncpus_setup */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | int ncpus = 1; |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | /* Set in early boot */ |
| 113 | static int have_root __initdata = 0; |
Jeff Dike | 1d1497e | 2007-05-06 14:51:26 -0700 | [diff] [blame] | 114 | |
| 115 | /* Set in uml_mem_setup and modified in linux_main */ |
Jeff Dike | ae17381 | 2005-11-07 00:58:57 -0800 | [diff] [blame] | 116 | long long physmem_size = 32 * 1024 * 1024; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
WANG Cong | 3af9c5b | 2008-04-28 02:13:52 -0700 | [diff] [blame] | 118 | static const char *usage_string = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | "User Mode Linux v%s\n" |
| 120 | " available at http://user-mode-linux.sourceforge.net/\n\n"; |
| 121 | |
| 122 | static int __init uml_version_setup(char *line, int *add) |
| 123 | { |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 124 | printf("%s\n", init_utsname()->release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | exit(0); |
| 126 | |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | __uml_setup("--version", uml_version_setup, |
| 131 | "--version\n" |
| 132 | " Prints the version number of the kernel.\n\n" |
| 133 | ); |
| 134 | |
| 135 | static int __init uml_root_setup(char *line, int *add) |
| 136 | { |
| 137 | have_root = 1; |
| 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | __uml_setup("root=", uml_root_setup, |
| 142 | "root=<file containing the root fs>\n" |
| 143 | " This is actually used by the generic kernel in exactly the same\n" |
| 144 | " way as in any other kernel. If you configure a number of block\n" |
| 145 | " devices and want to boot off something other than ubd0, you \n" |
| 146 | " would use something like:\n" |
| 147 | " root=/dev/ubd5\n\n" |
| 148 | ); |
| 149 | |
Jeff Dike | fbd5577 | 2006-02-07 12:58:40 -0800 | [diff] [blame] | 150 | static int __init no_skas_debug_setup(char *line, int *add) |
| 151 | { |
| 152 | printf("'debug' is not necessary to gdb UML in skas mode - run \n"); |
Jeff Dike | 96cee30 | 2008-05-12 14:01:48 -0700 | [diff] [blame] | 153 | printf("'gdb linux'\n"); |
Jeff Dike | fbd5577 | 2006-02-07 12:58:40 -0800 | [diff] [blame] | 154 | |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | __uml_setup("debug", no_skas_debug_setup, |
| 159 | "debug\n" |
| 160 | " this flag is not needed to run gdb on UML in skas mode\n\n" |
| 161 | ); |
| 162 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | #ifdef CONFIG_SMP |
| 164 | static int __init uml_ncpus_setup(char *line, int *add) |
| 165 | { |
Jeff Dike | a5ed1ff | 2007-05-06 14:50:58 -0700 | [diff] [blame] | 166 | if (!sscanf(line, "%d", &ncpus)) { |
| 167 | printf("Couldn't parse [%s]\n", line); |
| 168 | return -1; |
| 169 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Jeff Dike | a5ed1ff | 2007-05-06 14:50:58 -0700 | [diff] [blame] | 171 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | __uml_setup("ncpus=", uml_ncpus_setup, |
| 175 | "ncpus=<# of desired CPUs>\n" |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 176 | " This tells an SMP kernel how many virtual processors to start.\n\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | ); |
| 178 | #endif |
| 179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | static int __init Usage(char *line, int *add) |
| 181 | { |
Jeff Dike | a5ed1ff | 2007-05-06 14:50:58 -0700 | [diff] [blame] | 182 | const char **p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 184 | printf(usage_string, init_utsname()->release); |
Jeff Dike | a5ed1ff | 2007-05-06 14:50:58 -0700 | [diff] [blame] | 185 | p = &__uml_help_start; |
| 186 | while (p < &__uml_help_end) { |
| 187 | printf("%s", *p); |
| 188 | p++; |
| 189 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | exit(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | __uml_setup("--help", Usage, |
| 195 | "--help\n" |
| 196 | " Prints this message.\n\n" |
| 197 | ); |
| 198 | |
Karol Swietlicki | 6b7e967 | 2008-02-04 22:30:50 -0800 | [diff] [blame] | 199 | static void __init uml_checksetup(char *line, int *add) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | { |
| 201 | struct uml_param *p; |
| 202 | |
| 203 | p = &__uml_setup_start; |
Jeff Dike | c5d4bb1 | 2008-02-04 22:31:14 -0800 | [diff] [blame] | 204 | while (p < &__uml_setup_end) { |
WANG Cong | 3af9c5b | 2008-04-28 02:13:52 -0700 | [diff] [blame] | 205 | size_t n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | n = strlen(p->str); |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 208 | if (!strncmp(line, p->str, n) && p->setup_func(line + n, add)) |
Karol Swietlicki | 6b7e967 | 2008-02-04 22:30:50 -0800 | [diff] [blame] | 209 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | p++; |
| 211 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | static void __init uml_postsetup(void) |
| 215 | { |
| 216 | initcall_t *p; |
| 217 | |
| 218 | p = &__uml_postsetup_start; |
Jeff Dike | c5d4bb1 | 2008-02-04 22:31:14 -0800 | [diff] [blame] | 219 | while (p < &__uml_postsetup_end) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | (*p)(); |
| 221 | p++; |
| 222 | } |
| 223 | return; |
| 224 | } |
| 225 | |
Jeff Dike | 0983a88 | 2008-02-04 22:31:08 -0800 | [diff] [blame] | 226 | static int panic_exit(struct notifier_block *self, unsigned long unused1, |
| 227 | void *unused2) |
| 228 | { |
| 229 | bust_spinlocks(1); |
| 230 | show_regs(&(current->thread.regs)); |
| 231 | bust_spinlocks(0); |
| 232 | uml_exitcode = 1; |
| 233 | os_dump_core(); |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | static struct notifier_block panic_exit_notifier = { |
| 238 | .notifier_call = panic_exit, |
| 239 | .next = NULL, |
| 240 | .priority = 0 |
| 241 | }; |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | /* Set during early boot */ |
Jeff Dike | 536788f | 2008-02-08 04:22:07 -0800 | [diff] [blame] | 244 | unsigned long task_size; |
| 245 | EXPORT_SYMBOL(task_size); |
| 246 | |
| 247 | unsigned long host_task_size; |
| 248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | unsigned long brk_start; |
| 250 | unsigned long end_iomem; |
| 251 | EXPORT_SYMBOL(end_iomem); |
| 252 | |
| 253 | #define MIN_VMALLOC (32 * 1024 * 1024) |
| 254 | |
Jeff Dike | 23bbd58 | 2006-07-10 04:45:06 -0700 | [diff] [blame] | 255 | extern char __binary_start; |
| 256 | |
Alon Bar-Lev | 7a3a06d0 | 2007-02-12 00:54:26 -0800 | [diff] [blame] | 257 | int __init linux_main(int argc, char **argv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | { |
| 259 | unsigned long avail, diff; |
| 260 | unsigned long virtmem_size, max_physmem; |
Jeff Dike | 60a2988 | 2008-05-12 14:01:57 -0700 | [diff] [blame] | 261 | unsigned long stack; |
WANG Cong | 3af9c5b | 2008-04-28 02:13:52 -0700 | [diff] [blame] | 262 | unsigned int i; |
| 263 | int add; |
Paolo 'Blaisorblade' Giarrusso | cb66504 | 2005-07-27 11:43:31 -0700 | [diff] [blame] | 264 | char * mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 266 | for (i = 1; i < argc; i++) { |
| 267 | if ((i == 1) && (argv[i][0] == ' ')) |
| 268 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | add = 1; |
| 270 | uml_checksetup(argv[i], &add); |
| 271 | if (add) |
| 272 | add_arg(argv[i]); |
| 273 | } |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 274 | if (have_root == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | add_arg(DEFAULT_COMMAND_LINE); |
| 276 | |
Tom Spink | 40fb16a | 2008-06-05 22:46:12 -0700 | [diff] [blame] | 277 | host_task_size = os_get_top_address(); |
Jeff Dike | 536788f | 2008-02-08 04:22:07 -0800 | [diff] [blame] | 278 | /* |
| 279 | * TASK_SIZE needs to be PGDIR_SIZE aligned or else exit_mmap craps |
| 280 | * out |
| 281 | */ |
| 282 | task_size = host_task_size & PGDIR_MASK; |
| 283 | |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 284 | /* OS sanity checks that need to happen before the kernel runs */ |
Gennady Sharapov | 60d339f6 | 2005-09-03 15:57:47 -0700 | [diff] [blame] | 285 | os_early_checks(); |
Paolo 'Blaisorblade' Giarrusso | cb66504 | 2005-07-27 11:43:31 -0700 | [diff] [blame] | 286 | |
Jeff Dike | 42fda66 | 2007-10-16 01:26:50 -0700 | [diff] [blame] | 287 | can_do_skas(); |
| 288 | |
| 289 | if (proc_mm && ptrace_faultinfo) |
Paolo 'Blaisorblade' Giarrusso | cb66504 | 2005-07-27 11:43:31 -0700 | [diff] [blame] | 290 | mode = "SKAS3"; |
| 291 | else |
| 292 | mode = "SKAS0"; |
Paolo 'Blaisorblade' Giarrusso | cb66504 | 2005-07-27 11:43:31 -0700 | [diff] [blame] | 293 | |
| 294 | printf("UML running in %s mode\n", mode); |
| 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | brk_start = (unsigned long) sbrk(0); |
Jeff Dike | 77bf440 | 2007-10-16 01:26:58 -0700 | [diff] [blame] | 297 | |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 298 | /* |
| 299 | * Increase physical memory size for exec-shield users |
| 300 | * so they actually get what they asked for. This should |
| 301 | * add zero for non-exec shield users |
| 302 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
| 304 | diff = UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end); |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 305 | if (diff > 1024 * 1024) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | printf("Adding %ld bytes to physical memory to account for " |
| 307 | "exec-shield gap\n", diff); |
| 308 | physmem_size += UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end); |
| 309 | } |
| 310 | |
Jeff Dike | 1d1497e | 2007-05-06 14:51:26 -0700 | [diff] [blame] | 311 | uml_physmem = (unsigned long) &__binary_start & PAGE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
| 313 | /* Reserve up to 4M after the current brk */ |
| 314 | uml_reserved = ROUND_4M(brk_start) + (1 << 22); |
| 315 | |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 316 | setup_machinename(init_utsname()->machine); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | highmem = 0; |
| 319 | iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK; |
Jeff Dike | 536788f | 2008-02-08 04:22:07 -0800 | [diff] [blame] | 320 | max_physmem = TASK_SIZE - uml_physmem - iomem_size - MIN_VMALLOC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 322 | /* |
| 323 | * Zones have to begin on a 1 << MAX_ORDER page boundary, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | * so this makes sure that's true for highmem |
| 325 | */ |
| 326 | max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1); |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 327 | if (physmem_size + iomem_size > max_physmem) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | highmem = physmem_size + iomem_size - max_physmem; |
| 329 | physmem_size -= highmem; |
| 330 | #ifndef CONFIG_HIGHMEM |
| 331 | highmem = 0; |
| 332 | printf("CONFIG_HIGHMEM not enabled - physical memory shrunk " |
Jeff Dike | d9f8b62 | 2006-03-27 01:14:29 -0800 | [diff] [blame] | 333 | "to %Lu bytes\n", physmem_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | #endif |
| 335 | } |
| 336 | |
| 337 | high_physmem = uml_physmem + physmem_size; |
| 338 | end_iomem = high_physmem + iomem_size; |
| 339 | high_memory = (void *) end_iomem; |
| 340 | |
| 341 | start_vm = VMALLOC_START; |
| 342 | |
| 343 | setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem); |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 344 | if (init_maps(physmem_size, iomem_size, highmem)) { |
Jeff Dike | d9f8b62 | 2006-03-27 01:14:29 -0800 | [diff] [blame] | 345 | printf("Failed to allocate mem_map for %Lu bytes of physical " |
| 346 | "memory and %Lu bytes of highmem\n", physmem_size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | highmem); |
| 348 | exit(1); |
| 349 | } |
| 350 | |
| 351 | virtmem_size = physmem_size; |
Jeff Dike | 60a2988 | 2008-05-12 14:01:57 -0700 | [diff] [blame] | 352 | stack = (unsigned long) argv; |
| 353 | stack &= ~(1024 * 1024 - 1); |
| 354 | avail = stack - start_vm; |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 355 | if (physmem_size > avail) |
| 356 | virtmem_size = avail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | end_vm = start_vm + virtmem_size; |
| 358 | |
Jeff Dike | ba180fd | 2007-10-16 01:27:00 -0700 | [diff] [blame] | 359 | if (virtmem_size < physmem_size) |
Jeff Dike | ae17381 | 2005-11-07 00:58:57 -0800 | [diff] [blame] | 360 | printf("Kernel virtual memory size shrunk to %lu bytes\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | virtmem_size); |
| 362 | |
Jeff Dike | 0983a88 | 2008-02-04 22:31:08 -0800 | [diff] [blame] | 363 | atomic_notifier_chain_register(&panic_notifier_list, |
| 364 | &panic_exit_notifier); |
| 365 | |
Jeff Dike | a5ed1ff | 2007-05-06 14:50:58 -0700 | [diff] [blame] | 366 | uml_postsetup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Jeff Dike | 57598fd | 2007-05-10 22:22:30 -0700 | [diff] [blame] | 368 | stack_protections((unsigned long) &init_thread_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | os_flush_stdout(); |
| 370 | |
Jeff Dike | 77bf440 | 2007-10-16 01:26:58 -0700 | [diff] [blame] | 371 | return start_uml(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | } |
| 373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | void __init setup_arch(char **cmdline_p) |
| 375 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | paging_init(); |
Alon Bar-Lev | 19bf7e7 | 2007-02-12 00:54:23 -0800 | [diff] [blame] | 377 | strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); |
Jeff Dike | a5ed1ff | 2007-05-06 14:50:58 -0700 | [diff] [blame] | 378 | *cmdline_p = command_line; |
Jeff Dike | b4ffb6a | 2007-05-06 14:50:59 -0700 | [diff] [blame] | 379 | setup_hostinfo(host_info, sizeof host_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | void __init check_bugs(void) |
| 383 | { |
| 384 | arch_check_bugs(); |
Jeff Dike | a5ed1ff | 2007-05-06 14:50:58 -0700 | [diff] [blame] | 385 | os_check_bugs(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | |
Gerd Hoffmann | 9a0b581 | 2006-03-23 02:59:32 -0800 | [diff] [blame] | 388 | void apply_alternatives(struct alt_instr *start, struct alt_instr *end) |
| 389 | { |
| 390 | } |
| 391 | |
Theodore Tso | c61a8416 | 2006-07-03 00:24:09 -0700 | [diff] [blame] | 392 | #ifdef CONFIG_SMP |
Gerd Hoffmann | 9a0b581 | 2006-03-23 02:59:32 -0800 | [diff] [blame] | 393 | void alternatives_smp_module_add(struct module *mod, char *name, |
| 394 | void *locks, void *locks_end, |
| 395 | void *text, void *text_end) |
| 396 | { |
| 397 | } |
| 398 | |
| 399 | void alternatives_smp_module_del(struct module *mod) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | { |
| 401 | } |
Theodore Tso | c61a8416 | 2006-07-03 00:24:09 -0700 | [diff] [blame] | 402 | #endif |