Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: setup.c,v 1.126 2001/11/13 00:49:27 davem Exp $ |
| 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> |
| 19 | #include <linux/a.out.h> |
| 20 | #include <linux/tty.h> |
| 21 | #include <linux/delay.h> |
| 22 | #include <linux/config.h> |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/seq_file.h> |
| 25 | #include <linux/syscalls.h> |
| 26 | #include <linux/kdev_t.h> |
| 27 | #include <linux/major.h> |
| 28 | #include <linux/string.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/interrupt.h> |
| 31 | #include <linux/console.h> |
| 32 | #include <linux/spinlock.h> |
| 33 | #include <linux/root_dev.h> |
| 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> |
| 43 | #include <asm/kdebug.h> |
| 44 | #include <asm/mbus.h> |
| 45 | #include <asm/idprom.h> |
| 46 | #include <asm/machines.h> |
| 47 | #include <asm/cpudata.h> |
| 48 | #include <asm/setup.h> |
| 49 | |
| 50 | struct screen_info screen_info = { |
| 51 | 0, 0, /* orig-x, orig-y */ |
| 52 | 0, /* unused */ |
| 53 | 0, /* orig-video-page */ |
| 54 | 0, /* orig-video-mode */ |
| 55 | 128, /* orig-video-cols */ |
| 56 | 0,0,0, /* ega_ax, ega_bx, ega_cx */ |
| 57 | 54, /* orig-video-lines */ |
| 58 | 0, /* orig-video-isVGA */ |
| 59 | 16 /* orig-video-points */ |
| 60 | }; |
| 61 | |
| 62 | /* Typing sync at the prom prompt calls the function pointed to by |
| 63 | * romvec->pv_synchook which I set to the following function. |
| 64 | * This should sync all filesystems and return, for now it just |
| 65 | * prints out pretty messages and returns. |
| 66 | */ |
| 67 | |
| 68 | extern unsigned long trapbase; |
| 69 | void (*prom_palette)(int); |
| 70 | |
| 71 | /* Pretty sick eh? */ |
| 72 | void prom_sync_me(void) |
| 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 | |
| 84 | if (prom_palette) |
| 85 | prom_palette(1); |
| 86 | prom_printf("PROM SYNC COMMAND...\n"); |
| 87 | show_free_areas(); |
| 88 | if(current->pid != 0) { |
| 89 | local_irq_enable(); |
| 90 | sys_sync(); |
| 91 | local_irq_disable(); |
| 92 | } |
| 93 | prom_printf("Returning to prom\n"); |
| 94 | |
| 95 | __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" |
| 96 | "nop\n\t" |
| 97 | "nop\n\t" |
| 98 | "nop\n\t" : : "r" (prom_tbr)); |
| 99 | local_irq_restore(flags); |
| 100 | |
| 101 | return; |
| 102 | } |
| 103 | |
| 104 | unsigned int boot_flags __initdata = 0; |
| 105 | #define BOOTME_DEBUG 0x1 |
| 106 | #define BOOTME_SINGLE 0x2 |
| 107 | |
| 108 | /* Exported for mm/init.c:paging_init. */ |
| 109 | unsigned long cmdline_memory_size __initdata = 0; |
| 110 | |
| 111 | static void |
| 112 | prom_console_write(struct console *con, const char *s, unsigned n) |
| 113 | { |
| 114 | prom_write(s, n); |
| 115 | } |
| 116 | |
| 117 | static struct console prom_debug_console = { |
| 118 | .name = "debug", |
| 119 | .write = prom_console_write, |
| 120 | .flags = CON_PRINTBUFFER, |
| 121 | .index = -1, |
| 122 | }; |
| 123 | |
| 124 | int obp_system_intr(void) |
| 125 | { |
| 126 | if (boot_flags & BOOTME_DEBUG) { |
| 127 | printk("OBP: system interrupted\n"); |
| 128 | prom_halt(); |
| 129 | return 1; |
| 130 | } |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | /* |
| 135 | * Process kernel command line switches that are specific to the |
| 136 | * SPARC or that require special low-level processing. |
| 137 | */ |
| 138 | static void __init process_switch(char c) |
| 139 | { |
| 140 | switch (c) { |
| 141 | case 'd': |
| 142 | boot_flags |= BOOTME_DEBUG; |
| 143 | break; |
| 144 | case 's': |
| 145 | boot_flags |= BOOTME_SINGLE; |
| 146 | break; |
| 147 | case 'h': |
| 148 | prom_printf("boot_flags_init: Halt!\n"); |
| 149 | prom_halt(); |
| 150 | break; |
| 151 | case 'p': |
| 152 | /* Use PROM debug console. */ |
| 153 | register_console(&prom_debug_console); |
| 154 | break; |
| 155 | default: |
| 156 | printk("Unknown boot switch (-%c)\n", c); |
| 157 | break; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | static void __init process_console(char *commands) |
| 162 | { |
| 163 | serial_console = 0; |
| 164 | commands += 8; |
| 165 | /* Linux-style serial */ |
| 166 | if (!strncmp(commands, "ttyS", 4)) |
| 167 | serial_console = simple_strtoul(commands + 4, NULL, 10) + 1; |
| 168 | else if (!strncmp(commands, "tty", 3)) { |
| 169 | char c = *(commands + 3); |
| 170 | /* Solaris-style serial */ |
| 171 | if (c == 'a' || c == 'b') |
| 172 | serial_console = c - 'a' + 1; |
| 173 | /* else Linux-style fbcon, not serial */ |
| 174 | } |
| 175 | #if defined(CONFIG_PROM_CONSOLE) |
| 176 | if (!strncmp(commands, "prom", 4)) { |
| 177 | char *p; |
| 178 | |
| 179 | for (p = commands - 8; *p && *p != ' '; p++) |
| 180 | *p = ' '; |
| 181 | conswitchp = &prom_con; |
| 182 | } |
| 183 | #endif |
| 184 | } |
| 185 | |
| 186 | static void __init boot_flags_init(char *commands) |
| 187 | { |
| 188 | while (*commands) { |
| 189 | /* Move to the start of the next "argument". */ |
| 190 | while (*commands && *commands == ' ') |
| 191 | commands++; |
| 192 | |
| 193 | /* Process any command switches, otherwise skip it. */ |
| 194 | if (*commands == '\0') |
| 195 | break; |
| 196 | if (*commands == '-') { |
| 197 | commands++; |
| 198 | while (*commands && *commands != ' ') |
| 199 | process_switch(*commands++); |
| 200 | continue; |
| 201 | } |
| 202 | if (!strncmp(commands, "console=", 8)) { |
| 203 | process_console(commands); |
| 204 | } else if (!strncmp(commands, "mem=", 4)) { |
| 205 | /* |
| 206 | * "mem=XXX[kKmM] overrides the PROM-reported |
| 207 | * memory size. |
| 208 | */ |
| 209 | cmdline_memory_size = simple_strtoul(commands + 4, |
| 210 | &commands, 0); |
| 211 | if (*commands == 'K' || *commands == 'k') { |
| 212 | cmdline_memory_size <<= 10; |
| 213 | commands++; |
| 214 | } else if (*commands=='M' || *commands=='m') { |
| 215 | cmdline_memory_size <<= 20; |
| 216 | commands++; |
| 217 | } |
| 218 | } |
| 219 | while (*commands && *commands != ' ') |
| 220 | commands++; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | /* This routine will in the future do all the nasty prom stuff |
| 225 | * to probe for the mmu type and its parameters, etc. This will |
| 226 | * also be where SMP things happen plus the Sparc specific memory |
| 227 | * physical memory probe as on the alpha. |
| 228 | */ |
| 229 | |
| 230 | extern int prom_probe_memory(void); |
| 231 | extern void sun4c_probe_vac(void); |
| 232 | extern char cputypval; |
| 233 | extern unsigned long start, end; |
| 234 | extern void panic_setup(char *, int *); |
| 235 | |
| 236 | extern unsigned short root_flags; |
| 237 | extern unsigned short root_dev; |
| 238 | extern unsigned short ram_flags; |
| 239 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
| 240 | #define RAMDISK_PROMPT_FLAG 0x8000 |
| 241 | #define RAMDISK_LOAD_FLAG 0x4000 |
| 242 | |
| 243 | extern int root_mountflags; |
| 244 | |
| 245 | char reboot_command[COMMAND_LINE_SIZE]; |
| 246 | enum sparc_cpu sparc_cpu_model; |
| 247 | |
| 248 | struct tt_entry *sparc_ttable; |
| 249 | |
| 250 | struct pt_regs fake_swapper_regs; |
| 251 | |
| 252 | extern void paging_init(void); |
| 253 | |
| 254 | void __init setup_arch(char **cmdline_p) |
| 255 | { |
| 256 | int i; |
| 257 | unsigned long highest_paddr; |
| 258 | |
| 259 | sparc_ttable = (struct tt_entry *) &start; |
| 260 | |
| 261 | /* Initialize PROM console and command line. */ |
| 262 | *cmdline_p = prom_getbootargs(); |
| 263 | strcpy(saved_command_line, *cmdline_p); |
| 264 | |
| 265 | /* Set sparc_cpu_model */ |
| 266 | sparc_cpu_model = sun_unknown; |
| 267 | if(!strcmp(&cputypval,"sun4 ")) { sparc_cpu_model=sun4; } |
| 268 | if(!strcmp(&cputypval,"sun4c")) { sparc_cpu_model=sun4c; } |
| 269 | if(!strcmp(&cputypval,"sun4m")) { sparc_cpu_model=sun4m; } |
| 270 | if(!strcmp(&cputypval,"sun4s")) { sparc_cpu_model=sun4m; } /* CP-1200 with PROM 2.30 -E */ |
| 271 | if(!strcmp(&cputypval,"sun4d")) { sparc_cpu_model=sun4d; } |
| 272 | if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; } |
| 273 | if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; } |
| 274 | |
| 275 | #ifdef CONFIG_SUN4 |
| 276 | if (sparc_cpu_model != sun4) { |
| 277 | prom_printf("This kernel is for Sun4 architecture only.\n"); |
| 278 | prom_halt(); |
| 279 | } |
| 280 | #endif |
| 281 | printk("ARCH: "); |
| 282 | switch(sparc_cpu_model) { |
| 283 | case sun4: |
| 284 | printk("SUN4\n"); |
| 285 | break; |
| 286 | case sun4c: |
| 287 | printk("SUN4C\n"); |
| 288 | break; |
| 289 | case sun4m: |
| 290 | printk("SUN4M\n"); |
| 291 | break; |
| 292 | case sun4d: |
| 293 | printk("SUN4D\n"); |
| 294 | break; |
| 295 | case sun4e: |
| 296 | printk("SUN4E\n"); |
| 297 | break; |
| 298 | case sun4u: |
| 299 | printk("SUN4U\n"); |
| 300 | break; |
| 301 | default: |
| 302 | printk("UNKNOWN!\n"); |
| 303 | break; |
| 304 | }; |
| 305 | |
| 306 | #ifdef CONFIG_DUMMY_CONSOLE |
| 307 | conswitchp = &dummy_con; |
| 308 | #elif defined(CONFIG_PROM_CONSOLE) |
| 309 | conswitchp = &prom_con; |
| 310 | #endif |
| 311 | boot_flags_init(*cmdline_p); |
| 312 | |
| 313 | idprom_init(); |
| 314 | if (ARCH_SUN4C_SUN4) |
| 315 | sun4c_probe_vac(); |
| 316 | load_mmu(); |
| 317 | (void) prom_probe_memory(); |
| 318 | |
| 319 | phys_base = 0xffffffffUL; |
| 320 | highest_paddr = 0UL; |
| 321 | for (i = 0; sp_banks[i].num_bytes != 0; i++) { |
| 322 | unsigned long top; |
| 323 | |
| 324 | if (sp_banks[i].base_addr < phys_base) |
| 325 | phys_base = sp_banks[i].base_addr; |
| 326 | top = sp_banks[i].base_addr + |
| 327 | sp_banks[i].num_bytes; |
| 328 | if (highest_paddr < top) |
| 329 | highest_paddr = top; |
| 330 | } |
| 331 | pfn_base = phys_base >> PAGE_SHIFT; |
| 332 | |
| 333 | if (!root_flags) |
| 334 | root_mountflags &= ~MS_RDONLY; |
| 335 | ROOT_DEV = old_decode_dev(root_dev); |
| 336 | #ifdef CONFIG_BLK_DEV_INITRD |
| 337 | rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; |
| 338 | rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); |
| 339 | rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); |
| 340 | #endif |
| 341 | |
| 342 | prom_setsync(prom_sync_me); |
| 343 | |
| 344 | if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && |
| 345 | ((*(short *)linux_dbvec) != -1)) { |
| 346 | printk("Booted under KADB. Syncing trap table.\n"); |
| 347 | (*(linux_dbvec->teach_debugger))(); |
| 348 | } |
| 349 | |
| 350 | init_mm.context = (unsigned long) NO_CONTEXT; |
| 351 | init_task.thread.kregs = &fake_swapper_regs; |
| 352 | |
| 353 | paging_init(); |
| 354 | } |
| 355 | |
| 356 | static int __init set_preferred_console(void) |
| 357 | { |
| 358 | int idev, odev; |
| 359 | |
| 360 | /* The user has requested a console so this is already set up. */ |
| 361 | if (serial_console >= 0) |
| 362 | return -EBUSY; |
| 363 | |
| 364 | idev = prom_query_input_device(); |
| 365 | odev = prom_query_output_device(); |
| 366 | if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) { |
| 367 | serial_console = 0; |
| 368 | } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) { |
| 369 | serial_console = 1; |
| 370 | } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) { |
| 371 | serial_console = 2; |
| 372 | } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OTTYA) { |
| 373 | prom_printf("MrCoffee ttya\n"); |
| 374 | serial_console = 1; |
| 375 | } else if (idev == PROMDEV_I_UNK && odev == PROMDEV_OSCREEN) { |
| 376 | serial_console = 0; |
| 377 | prom_printf("MrCoffee keyboard\n"); |
| 378 | } else { |
| 379 | prom_printf("Confusing console (idev %d, odev %d)\n", |
| 380 | idev, odev); |
| 381 | serial_console = 1; |
| 382 | } |
| 383 | |
| 384 | if (serial_console) |
| 385 | return add_preferred_console("ttyS", serial_console - 1, NULL); |
| 386 | |
| 387 | return -ENODEV; |
| 388 | } |
| 389 | console_initcall(set_preferred_console); |
| 390 | |
| 391 | extern char *sparc_cpu_type; |
| 392 | extern char *sparc_fpu_type; |
| 393 | |
| 394 | static int show_cpuinfo(struct seq_file *m, void *__unused) |
| 395 | { |
| 396 | seq_printf(m, |
| 397 | "cpu\t\t: %s\n" |
| 398 | "fpu\t\t: %s\n" |
| 399 | "promlib\t\t: Version %d Revision %d\n" |
| 400 | "prom\t\t: %d.%d\n" |
| 401 | "type\t\t: %s\n" |
| 402 | "ncpus probed\t: %d\n" |
| 403 | "ncpus active\t: %d\n" |
| 404 | #ifndef CONFIG_SMP |
| 405 | "CPU0Bogo\t: %lu.%02lu\n" |
| 406 | "CPU0ClkTck\t: %ld\n" |
| 407 | #endif |
| 408 | , |
| 409 | sparc_cpu_type ? sparc_cpu_type : "undetermined", |
| 410 | sparc_fpu_type ? sparc_fpu_type : "undetermined", |
| 411 | romvec->pv_romvers, |
| 412 | prom_rev, |
| 413 | romvec->pv_printrev >> 16, |
| 414 | romvec->pv_printrev & 0xffff, |
| 415 | &cputypval, |
| 416 | num_possible_cpus(), |
| 417 | num_online_cpus() |
| 418 | #ifndef CONFIG_SMP |
| 419 | , cpu_data(0).udelay_val/(500000/HZ), |
| 420 | (cpu_data(0).udelay_val/(5000/HZ)) % 100, |
| 421 | cpu_data(0).clock_tick |
| 422 | #endif |
| 423 | ); |
| 424 | |
| 425 | #ifdef CONFIG_SMP |
| 426 | smp_bogo(m); |
| 427 | #endif |
| 428 | mmu_info(m); |
| 429 | #ifdef CONFIG_SMP |
| 430 | smp_info(m); |
| 431 | #endif |
| 432 | return 0; |
| 433 | } |
| 434 | |
| 435 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 436 | { |
| 437 | /* The pointer we are returning is arbitrary, |
| 438 | * it just has to be non-NULL and not IS_ERR |
| 439 | * in the success case. |
| 440 | */ |
| 441 | return *pos == 0 ? &c_start : NULL; |
| 442 | } |
| 443 | |
| 444 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 445 | { |
| 446 | ++*pos; |
| 447 | return c_start(m, pos); |
| 448 | } |
| 449 | |
| 450 | static void c_stop(struct seq_file *m, void *v) |
| 451 | { |
| 452 | } |
| 453 | |
| 454 | struct seq_operations cpuinfo_op = { |
| 455 | .start =c_start, |
| 456 | .next = c_next, |
| 457 | .stop = c_stop, |
| 458 | .show = show_cpuinfo, |
| 459 | }; |
| 460 | |
| 461 | extern int stop_a_enabled; |
| 462 | |
| 463 | void sun_do_break(void) |
| 464 | { |
| 465 | if (!stop_a_enabled) |
| 466 | return; |
| 467 | |
| 468 | printk("\n"); |
| 469 | flush_user_windows(); |
| 470 | |
| 471 | prom_cmdline(); |
| 472 | } |
| 473 | |
| 474 | int serial_console = -1; |
| 475 | int stop_a_enabled = 1; |