Adrian Bunk | 88278ca | 2008-05-19 16:53:02 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * linux/arch/sparc/kernel/setup.c |
| 3 | * |
| 4 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) |
| 5 | * Copyright (C) 2000 Anton Blanchard (anton@samba.org) |
| 6 | */ |
| 7 | |
| 8 | #include <linux/errno.h> |
| 9 | #include <linux/sched.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/mm.h> |
| 12 | #include <linux/stddef.h> |
| 13 | #include <linux/unistd.h> |
| 14 | #include <linux/ptrace.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/initrd.h> |
| 17 | #include <asm/smp.h> |
| 18 | #include <linux/user.h> |
Jon Smirl | 894673e | 2006-07-10 04:44:13 -0700 | [diff] [blame] | 19 | #include <linux/screen_info.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/fs.h> |
| 22 | #include <linux/seq_file.h> |
| 23 | #include <linux/syscalls.h> |
| 24 | #include <linux/kdev_t.h> |
| 25 | #include <linux/major.h> |
| 26 | #include <linux/string.h> |
| 27 | #include <linux/init.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/console.h> |
| 30 | #include <linux/spinlock.h> |
| 31 | #include <linux/root_dev.h> |
Bob Breuer | a8cbdce | 2006-06-20 00:28:33 -0700 | [diff] [blame] | 32 | #include <linux/cpu.h> |
Christoph Hellwig | 1eeb66a | 2007-05-08 00:27:03 -0700 | [diff] [blame] | 33 | #include <linux/kdebug.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/system.h> |
| 36 | #include <asm/io.h> |
| 37 | #include <asm/processor.h> |
| 38 | #include <asm/oplib.h> |
| 39 | #include <asm/page.h> |
| 40 | #include <asm/pgtable.h> |
| 41 | #include <asm/traps.h> |
| 42 | #include <asm/vaddrs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <asm/mbus.h> |
| 44 | #include <asm/idprom.h> |
| 45 | #include <asm/machines.h> |
| 46 | #include <asm/cpudata.h> |
| 47 | #include <asm/setup.h> |
| 48 | |
Sam Ravnborg | 53ae341 | 2008-12-07 00:02:08 -0800 | [diff] [blame] | 49 | #include "kernel.h" |
| 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | struct screen_info screen_info = { |
| 52 | 0, 0, /* orig-x, orig-y */ |
| 53 | 0, /* unused */ |
| 54 | 0, /* orig-video-page */ |
| 55 | 0, /* orig-video-mode */ |
| 56 | 128, /* orig-video-cols */ |
| 57 | 0,0,0, /* ega_ax, ega_bx, ega_cx */ |
| 58 | 54, /* orig-video-lines */ |
| 59 | 0, /* orig-video-isVGA */ |
| 60 | 16 /* orig-video-points */ |
| 61 | }; |
| 62 | |
| 63 | /* Typing sync at the prom prompt calls the function pointed to by |
| 64 | * romvec->pv_synchook which I set to the following function. |
| 65 | * This should sync all filesystems and return, for now it just |
| 66 | * prints out pretty messages and returns. |
| 67 | */ |
| 68 | |
| 69 | extern unsigned long trapbase; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | /* Pretty sick eh? */ |
Adrian Bunk | c61c65c | 2008-06-05 11:40:58 -0700 | [diff] [blame] | 72 | static void prom_sync_me(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | { |
| 74 | unsigned long prom_tbr, flags; |
| 75 | |
| 76 | /* XXX Badly broken. FIX! - Anton */ |
| 77 | local_irq_save(flags); |
| 78 | __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr)); |
| 79 | __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" |
| 80 | "nop\n\t" |
| 81 | "nop\n\t" |
| 82 | "nop\n\t" : : "r" (&trapbase)); |
| 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | prom_printf("PROM SYNC COMMAND...\n"); |
| 85 | show_free_areas(); |
| 86 | if(current->pid != 0) { |
| 87 | local_irq_enable(); |
| 88 | sys_sync(); |
| 89 | local_irq_disable(); |
| 90 | } |
| 91 | prom_printf("Returning to prom\n"); |
| 92 | |
| 93 | __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" |
| 94 | "nop\n\t" |
| 95 | "nop\n\t" |
| 96 | "nop\n\t" : : "r" (prom_tbr)); |
| 97 | local_irq_restore(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | } |
| 99 | |
Adrian Bunk | c61c65c | 2008-06-05 11:40:58 -0700 | [diff] [blame] | 100 | static unsigned int boot_flags __initdata = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #define BOOTME_DEBUG 0x1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
| 103 | /* Exported for mm/init.c:paging_init. */ |
| 104 | unsigned long cmdline_memory_size __initdata = 0; |
| 105 | |
| 106 | static void |
| 107 | prom_console_write(struct console *con, const char *s, unsigned n) |
| 108 | { |
| 109 | prom_write(s, n); |
| 110 | } |
| 111 | |
| 112 | static struct console prom_debug_console = { |
| 113 | .name = "debug", |
| 114 | .write = prom_console_write, |
| 115 | .flags = CON_PRINTBUFFER, |
| 116 | .index = -1, |
| 117 | }; |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | /* |
| 120 | * Process kernel command line switches that are specific to the |
| 121 | * SPARC or that require special low-level processing. |
| 122 | */ |
| 123 | static void __init process_switch(char c) |
| 124 | { |
| 125 | switch (c) { |
| 126 | case 'd': |
| 127 | boot_flags |= BOOTME_DEBUG; |
| 128 | break; |
| 129 | case 's': |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | break; |
| 131 | case 'h': |
| 132 | prom_printf("boot_flags_init: Halt!\n"); |
| 133 | prom_halt(); |
| 134 | break; |
| 135 | case 'p': |
| 136 | /* Use PROM debug console. */ |
| 137 | register_console(&prom_debug_console); |
| 138 | break; |
| 139 | default: |
| 140 | printk("Unknown boot switch (-%c)\n", c); |
| 141 | break; |
| 142 | } |
| 143 | } |
| 144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | static void __init boot_flags_init(char *commands) |
| 146 | { |
| 147 | while (*commands) { |
| 148 | /* Move to the start of the next "argument". */ |
| 149 | while (*commands && *commands == ' ') |
| 150 | commands++; |
| 151 | |
| 152 | /* Process any command switches, otherwise skip it. */ |
| 153 | if (*commands == '\0') |
| 154 | break; |
| 155 | if (*commands == '-') { |
| 156 | commands++; |
| 157 | while (*commands && *commands != ' ') |
| 158 | process_switch(*commands++); |
| 159 | continue; |
| 160 | } |
David S. Miller | c73fcc8 | 2007-07-20 16:59:26 -0700 | [diff] [blame] | 161 | if (!strncmp(commands, "mem=", 4)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | /* |
| 163 | * "mem=XXX[kKmM] overrides the PROM-reported |
| 164 | * memory size. |
| 165 | */ |
| 166 | cmdline_memory_size = simple_strtoul(commands + 4, |
| 167 | &commands, 0); |
| 168 | if (*commands == 'K' || *commands == 'k') { |
| 169 | cmdline_memory_size <<= 10; |
| 170 | commands++; |
| 171 | } else if (*commands=='M' || *commands=='m') { |
| 172 | cmdline_memory_size <<= 20; |
| 173 | commands++; |
| 174 | } |
| 175 | } |
| 176 | while (*commands && *commands != ' ') |
| 177 | commands++; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | /* This routine will in the future do all the nasty prom stuff |
| 182 | * to probe for the mmu type and its parameters, etc. This will |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame] | 183 | * also be where SMP things happen. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | */ |
| 185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | extern void sun4c_probe_vac(void); |
| 187 | extern char cputypval; |
| 188 | extern unsigned long start, end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
| 190 | extern unsigned short root_flags; |
| 191 | extern unsigned short root_dev; |
| 192 | extern unsigned short ram_flags; |
| 193 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
| 194 | #define RAMDISK_PROMPT_FLAG 0x8000 |
| 195 | #define RAMDISK_LOAD_FLAG 0x4000 |
| 196 | |
| 197 | extern int root_mountflags; |
| 198 | |
| 199 | char reboot_command[COMMAND_LINE_SIZE]; |
Sam Ravnborg | 6943f3d | 2009-01-08 16:58:05 -0800 | [diff] [blame] | 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | enum sparc_cpu sparc_cpu_model; |
Sam Ravnborg | 6943f3d | 2009-01-08 16:58:05 -0800 | [diff] [blame] | 202 | EXPORT_SYMBOL(sparc_cpu_model); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | struct tt_entry *sparc_ttable; |
| 205 | |
| 206 | struct pt_regs fake_swapper_regs; |
| 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | void __init setup_arch(char **cmdline_p) |
| 209 | { |
| 210 | int i; |
| 211 | unsigned long highest_paddr; |
| 212 | |
| 213 | sparc_ttable = (struct tt_entry *) &start; |
| 214 | |
| 215 | /* Initialize PROM console and command line. */ |
| 216 | *cmdline_p = prom_getbootargs(); |
Alon Bar-Lev | 08e7ca1 | 2007-02-12 00:54:21 -0800 | [diff] [blame] | 217 | strcpy(boot_command_line, *cmdline_p); |
David S. Miller | 3fbe36d | 2008-09-10 23:40:32 -0700 | [diff] [blame] | 218 | parse_early_param(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | /* Set sparc_cpu_model */ |
| 221 | sparc_cpu_model = sun_unknown; |
David S. Miller | 365b50f | 2008-09-02 01:13:31 -0700 | [diff] [blame] | 222 | if (!strcmp(&cputypval,"sun4 ")) |
| 223 | sparc_cpu_model = sun4; |
| 224 | if (!strcmp(&cputypval,"sun4c")) |
| 225 | sparc_cpu_model = sun4c; |
| 226 | if (!strcmp(&cputypval,"sun4m")) |
| 227 | sparc_cpu_model = sun4m; |
| 228 | if (!strcmp(&cputypval,"sun4s")) |
| 229 | sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */ |
| 230 | if (!strcmp(&cputypval,"sun4d")) |
| 231 | sparc_cpu_model = sun4d; |
| 232 | if (!strcmp(&cputypval,"sun4e")) |
| 233 | sparc_cpu_model = sun4e; |
| 234 | if (!strcmp(&cputypval,"sun4u")) |
| 235 | sparc_cpu_model = sun4u; |
Konrad Eisele | 0fd7ef1 | 2009-08-17 00:13:31 +0000 | [diff] [blame] | 236 | if (!strncmp(&cputypval, "leon" , 4)) |
| 237 | sparc_cpu_model = sparc_leon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | printk("ARCH: "); |
| 240 | switch(sparc_cpu_model) { |
| 241 | case sun4: |
| 242 | printk("SUN4\n"); |
| 243 | break; |
| 244 | case sun4c: |
| 245 | printk("SUN4C\n"); |
| 246 | break; |
| 247 | case sun4m: |
| 248 | printk("SUN4M\n"); |
| 249 | break; |
| 250 | case sun4d: |
| 251 | printk("SUN4D\n"); |
| 252 | break; |
| 253 | case sun4e: |
| 254 | printk("SUN4E\n"); |
| 255 | break; |
| 256 | case sun4u: |
| 257 | printk("SUN4U\n"); |
| 258 | break; |
Konrad Eisele | 0fd7ef1 | 2009-08-17 00:13:31 +0000 | [diff] [blame] | 259 | case sparc_leon: |
| 260 | printk("LEON\n"); |
| 261 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | default: |
| 263 | printk("UNKNOWN!\n"); |
| 264 | break; |
| 265 | }; |
| 266 | |
| 267 | #ifdef CONFIG_DUMMY_CONSOLE |
| 268 | conswitchp = &dummy_con; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | #endif |
| 270 | boot_flags_init(*cmdline_p); |
| 271 | |
| 272 | idprom_init(); |
Adrian Bunk | 5110bd2 | 2008-08-31 20:59:37 -0700 | [diff] [blame] | 273 | if (ARCH_SUN4C) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | sun4c_probe_vac(); |
| 275 | load_mmu(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
| 277 | phys_base = 0xffffffffUL; |
| 278 | highest_paddr = 0UL; |
| 279 | for (i = 0; sp_banks[i].num_bytes != 0; i++) { |
| 280 | unsigned long top; |
| 281 | |
| 282 | if (sp_banks[i].base_addr < phys_base) |
| 283 | phys_base = sp_banks[i].base_addr; |
| 284 | top = sp_banks[i].base_addr + |
| 285 | sp_banks[i].num_bytes; |
| 286 | if (highest_paddr < top) |
| 287 | highest_paddr = top; |
| 288 | } |
| 289 | pfn_base = phys_base >> PAGE_SHIFT; |
| 290 | |
| 291 | if (!root_flags) |
| 292 | root_mountflags &= ~MS_RDONLY; |
| 293 | ROOT_DEV = old_decode_dev(root_dev); |
Al Viro | 5d2170a | 2006-06-22 14:47:14 -0700 | [diff] [blame] | 294 | #ifdef CONFIG_BLK_DEV_RAM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; |
| 296 | rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); |
| 297 | rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); |
| 298 | #endif |
| 299 | |
| 300 | prom_setsync(prom_sync_me); |
| 301 | |
| 302 | if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && |
| 303 | ((*(short *)linux_dbvec) != -1)) { |
| 304 | printk("Booted under KADB. Syncing trap table.\n"); |
| 305 | (*(linux_dbvec->teach_debugger))(); |
| 306 | } |
| 307 | |
| 308 | init_mm.context = (unsigned long) NO_CONTEXT; |
| 309 | init_task.thread.kregs = &fake_swapper_regs; |
| 310 | |
| 311 | paging_init(); |
Krzysztof Helt | a23b423 | 2006-08-25 00:46:02 -0700 | [diff] [blame] | 312 | |
| 313 | smp_setup_cpu_possible_map(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | } |
| 315 | |
Bob Breuer | a8cbdce | 2006-06-20 00:28:33 -0700 | [diff] [blame] | 316 | static int ncpus_probed; |
| 317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | static int show_cpuinfo(struct seq_file *m, void *__unused) |
| 319 | { |
| 320 | seq_printf(m, |
| 321 | "cpu\t\t: %s\n" |
| 322 | "fpu\t\t: %s\n" |
| 323 | "promlib\t\t: Version %d Revision %d\n" |
| 324 | "prom\t\t: %d.%d\n" |
| 325 | "type\t\t: %s\n" |
| 326 | "ncpus probed\t: %d\n" |
| 327 | "ncpus active\t: %d\n" |
| 328 | #ifndef CONFIG_SMP |
| 329 | "CPU0Bogo\t: %lu.%02lu\n" |
| 330 | "CPU0ClkTck\t: %ld\n" |
| 331 | #endif |
| 332 | , |
Sam Ravnborg | 6c6bd8b | 2008-12-05 19:08:22 -0800 | [diff] [blame] | 333 | sparc_cpu_type, |
| 334 | sparc_fpu_type , |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | romvec->pv_romvers, |
| 336 | prom_rev, |
| 337 | romvec->pv_printrev >> 16, |
| 338 | romvec->pv_printrev & 0xffff, |
| 339 | &cputypval, |
Bob Breuer | a8cbdce | 2006-06-20 00:28:33 -0700 | [diff] [blame] | 340 | ncpus_probed, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | num_online_cpus() |
| 342 | #ifndef CONFIG_SMP |
| 343 | , cpu_data(0).udelay_val/(500000/HZ), |
| 344 | (cpu_data(0).udelay_val/(5000/HZ)) % 100, |
| 345 | cpu_data(0).clock_tick |
| 346 | #endif |
| 347 | ); |
| 348 | |
| 349 | #ifdef CONFIG_SMP |
| 350 | smp_bogo(m); |
| 351 | #endif |
| 352 | mmu_info(m); |
| 353 | #ifdef CONFIG_SMP |
| 354 | smp_info(m); |
| 355 | #endif |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 360 | { |
| 361 | /* The pointer we are returning is arbitrary, |
| 362 | * it just has to be non-NULL and not IS_ERR |
| 363 | * in the success case. |
| 364 | */ |
| 365 | return *pos == 0 ? &c_start : NULL; |
| 366 | } |
| 367 | |
| 368 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 369 | { |
| 370 | ++*pos; |
| 371 | return c_start(m, pos); |
| 372 | } |
| 373 | |
| 374 | static void c_stop(struct seq_file *m, void *v) |
| 375 | { |
| 376 | } |
| 377 | |
Jan Engelhardt | 872e2be | 2008-01-22 18:29:20 -0800 | [diff] [blame] | 378 | const struct seq_operations cpuinfo_op = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | .start =c_start, |
| 380 | .next = c_next, |
| 381 | .stop = c_stop, |
| 382 | .show = show_cpuinfo, |
| 383 | }; |
| 384 | |
| 385 | extern int stop_a_enabled; |
| 386 | |
| 387 | void sun_do_break(void) |
| 388 | { |
| 389 | if (!stop_a_enabled) |
| 390 | return; |
| 391 | |
| 392 | printk("\n"); |
| 393 | flush_user_windows(); |
| 394 | |
| 395 | prom_cmdline(); |
| 396 | } |
Sam Ravnborg | 6943f3d | 2009-01-08 16:58:05 -0800 | [diff] [blame] | 397 | EXPORT_SYMBOL(sun_do_break); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | int stop_a_enabled = 1; |
Bob Breuer | a8cbdce | 2006-06-20 00:28:33 -0700 | [diff] [blame] | 400 | |
| 401 | static int __init topology_init(void) |
| 402 | { |
| 403 | int i, ncpus, err; |
| 404 | |
| 405 | /* Count the number of physically present processors in |
| 406 | * the machine, even on uniprocessor, so that /proc/cpuinfo |
| 407 | * output is consistent with 2.4.x |
| 408 | */ |
| 409 | ncpus = 0; |
| 410 | while (!cpu_find_by_instance(ncpus, NULL, NULL)) |
| 411 | ncpus++; |
| 412 | ncpus_probed = ncpus; |
| 413 | |
| 414 | err = 0; |
| 415 | for_each_online_cpu(i) { |
| 416 | struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); |
| 417 | if (!p) |
| 418 | err = -ENOMEM; |
| 419 | else |
Andrew Morton | 9458377 | 2006-06-29 02:24:27 -0700 | [diff] [blame] | 420 | register_cpu(p, i); |
Bob Breuer | a8cbdce | 2006-06-20 00:28:33 -0700 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | return err; |
| 424 | } |
| 425 | |
| 426 | subsys_initcall(topology_init); |