1/* 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/screen_info.h> 20#include <linux/delay.h> 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> 32#include <linux/cpu.h> 33#include <linux/kdebug.h> 34 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/mbus.h> 44#include <asm/idprom.h> 45#include <asm/machines.h> 46#include <asm/cpudata.h> 47#include <asm/setup.h> 48 49#include "kernel.h" 50 51struct 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 69extern unsigned long trapbase; 70 71/* Pretty sick eh? */ 72static void prom_sync_me(void) 73{ 74 unsigned long prom_tbr, flags; 75 76 local_irq_save(flags); 77 __asm__ __volatile__("rd %%tbr, %0\n\t" : "=r" (prom_tbr)); 78 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" 79 "nop\n\t" 80 "nop\n\t" 81 "nop\n\t" : : "r" (&trapbase)); 82 83 prom_printf("PROM SYNC COMMAND...\n"); 84 show_free_areas(); 85 if(current->pid != 0) { 86 local_irq_enable(); 87 sys_sync(); 88 local_irq_disable(); 89 } 90 prom_printf("Returning to prom\n"); 91 92 __asm__ __volatile__("wr %0, 0x0, %%tbr\n\t" 93 "nop\n\t" 94 "nop\n\t" 95 "nop\n\t" : : "r" (prom_tbr)); 96 local_irq_restore(flags); 97} 98 99static unsigned int boot_flags __initdata = 0; 100#define BOOTME_DEBUG 0x1 101 102/* Exported for mm/init.c:paging_init. */ 103unsigned long cmdline_memory_size __initdata = 0; 104 105static void 106prom_console_write(struct console *con, const char *s, unsigned n) 107{ 108 prom_write(s, n); 109} 110 111static struct console prom_debug_console = { 112 .name = "debug", 113 .write = prom_console_write, 114 .flags = CON_PRINTBUFFER, 115 .index = -1, 116}; 117 118/* 119 * Process kernel command line switches that are specific to the 120 * SPARC or that require special low-level processing. 121 */ 122static void __init process_switch(char c) 123{ 124 switch (c) { 125 case 'd': 126 boot_flags |= BOOTME_DEBUG; 127 break; 128 case 's': 129 break; 130 case 'h': 131 prom_printf("boot_flags_init: Halt!\n"); 132 prom_halt(); 133 break; 134 case 'p': 135 /* Use PROM debug console. */ 136 register_console(&prom_debug_console); 137 break; 138 default: 139 printk("Unknown boot switch (-%c)\n", c); 140 break; 141 } 142} 143 144static void __init boot_flags_init(char *commands) 145{ 146 while (*commands) { 147 /* Move to the start of the next "argument". */ 148 while (*commands && *commands == ' ') 149 commands++; 150 151 /* Process any command switches, otherwise skip it. */ 152 if (*commands == '\0') 153 break; 154 if (*commands == '-') { 155 commands++; 156 while (*commands && *commands != ' ') 157 process_switch(*commands++); 158 continue; 159 } 160 if (!strncmp(commands, "mem=", 4)) { 161 cmdline_memory_size = simple_strtoul(commands + 4, 162 &commands, 0); 163 if (*commands == 'K' || *commands == 'k') { 164 cmdline_memory_size <<= 10; 165 commands++; 166 } else if (*commands=='M' || *commands=='m') { 167 cmdline_memory_size <<= 20; 168 commands++; 169 } 170 } 171 while (*commands && *commands != ' ') 172 commands++; 173 } 174} 175 176/* This routine will in the future do all the nasty prom stuff 177 * to probe for the mmu type and its parameters, etc. This will 178 * also be where SMP things happen. 179 */ 180 181extern void sun4c_probe_vac(void); 182extern char cputypval; 183extern unsigned long start, end; 184 185extern unsigned short root_flags; 186extern unsigned short root_dev; 187extern unsigned short ram_flags; 188#define RAMDISK_IMAGE_START_MASK 0x07FF 189#define RAMDISK_PROMPT_FLAG 0x8000 190#define RAMDISK_LOAD_FLAG 0x4000 191 192extern int root_mountflags; 193 194char reboot_command[COMMAND_LINE_SIZE]; 195 196enum sparc_cpu sparc_cpu_model; 197EXPORT_SYMBOL(sparc_cpu_model); 198 199struct tt_entry *sparc_ttable; 200 201struct pt_regs fake_swapper_regs; 202 203void __init setup_arch(char **cmdline_p) 204{ 205 int i; 206 unsigned long highest_paddr; 207 208 sparc_ttable = (struct tt_entry *) &start; 209 210 /* Initialize PROM console and command line. */ 211 *cmdline_p = prom_getbootargs(); 212 strcpy(boot_command_line, *cmdline_p); 213 parse_early_param(); 214 215 /* Set sparc_cpu_model */ 216 sparc_cpu_model = sun_unknown; 217 if (!strcmp(&cputypval,"sun4 ")) 218 sparc_cpu_model = sun4; 219 if (!strcmp(&cputypval,"sun4c")) 220 sparc_cpu_model = sun4c; 221 if (!strcmp(&cputypval,"sun4m")) 222 sparc_cpu_model = sun4m; 223 if (!strcmp(&cputypval,"sun4s")) 224 sparc_cpu_model = sun4m; /* CP-1200 with PROM 2.30 -E */ 225 if (!strcmp(&cputypval,"sun4d")) 226 sparc_cpu_model = sun4d; 227 if (!strcmp(&cputypval,"sun4e")) 228 sparc_cpu_model = sun4e; 229 if (!strcmp(&cputypval,"sun4u")) 230 sparc_cpu_model = sun4u; 231 if (!strncmp(&cputypval, "leon" , 4)) 232 sparc_cpu_model = sparc_leon; 233 234 printk("ARCH: "); 235 switch(sparc_cpu_model) { 236 case sun4: 237 printk("SUN4\n"); 238 break; 239 case sun4c: 240 printk("SUN4C\n"); 241 break; 242 case sun4m: 243 printk("SUN4M\n"); 244 break; 245 case sun4d: 246 printk("SUN4D\n"); 247 break; 248 case sun4e: 249 printk("SUN4E\n"); 250 break; 251 case sun4u: 252 printk("SUN4U\n"); 253 break; 254 case sparc_leon: 255 printk("LEON\n"); 256 break; 257 default: 258 printk("UNKNOWN!\n"); 259 break; 260 }; 261 262#ifdef CONFIG_DUMMY_CONSOLE 263 conswitchp = &dummy_con; 264#endif 265 boot_flags_init(*cmdline_p); 266 267 idprom_init(); 268 if (ARCH_SUN4C) 269 sun4c_probe_vac(); 270 load_mmu(); 271 272 phys_base = 0xffffffffUL; 273 highest_paddr = 0UL; 274 for (i = 0; sp_banks[i].num_bytes != 0; i++) { 275 unsigned long top; 276 277 if (sp_banks[i].base_addr < phys_base) 278 phys_base = sp_banks[i].base_addr; 279 top = sp_banks[i].base_addr + 280 sp_banks[i].num_bytes; 281 if (highest_paddr < top) 282 highest_paddr = top; 283 } 284 pfn_base = phys_base >> PAGE_SHIFT; 285 286 if (!root_flags) 287 root_mountflags &= ~MS_RDONLY; 288 ROOT_DEV = old_decode_dev(root_dev); 289#ifdef CONFIG_BLK_DEV_RAM 290 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; 291 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); 292 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); 293#endif 294 295 prom_setsync(prom_sync_me); 296 297 if((boot_flags&BOOTME_DEBUG) && (linux_dbvec!=0) && 298 ((*(short *)linux_dbvec) != -1)) { 299 printk("Booted under KADB. Syncing trap table.\n"); 300 (*(linux_dbvec->teach_debugger))(); 301 } 302 303 init_mm.context = (unsigned long) NO_CONTEXT; 304 init_task.thread.kregs = &fake_swapper_regs; 305 306 paging_init(); 307 308 smp_setup_cpu_possible_map(); 309} 310 311static int ncpus_probed; 312 313static int show_cpuinfo(struct seq_file *m, void *__unused) 314{ 315 seq_printf(m, 316 "cpu\t\t: %s\n" 317 "fpu\t\t: %s\n" 318 "promlib\t\t: Version %d Revision %d\n" 319 "prom\t\t: %d.%d\n" 320 "type\t\t: %s\n" 321 "ncpus probed\t: %d\n" 322 "ncpus active\t: %d\n" 323#ifndef CONFIG_SMP 324 "CPU0Bogo\t: %lu.%02lu\n" 325 "CPU0ClkTck\t: %ld\n" 326#endif 327 , 328 sparc_cpu_type, 329 sparc_fpu_type , 330 romvec->pv_romvers, 331 prom_rev, 332 romvec->pv_printrev >> 16, 333 romvec->pv_printrev & 0xffff, 334 &cputypval, 335 ncpus_probed, 336 num_online_cpus() 337#ifndef CONFIG_SMP 338 , cpu_data(0).udelay_val/(500000/HZ), 339 (cpu_data(0).udelay_val/(5000/HZ)) % 100, 340 cpu_data(0).clock_tick 341#endif 342 ); 343 344#ifdef CONFIG_SMP 345 smp_bogo(m); 346#endif 347 mmu_info(m); 348#ifdef CONFIG_SMP 349 smp_info(m); 350#endif 351 return 0; 352} 353 354static void *c_start(struct seq_file *m, loff_t *pos) 355{ 356 /* The pointer we are returning is arbitrary, 357 * it just has to be non-NULL and not IS_ERR 358 * in the success case. 359 */ 360 return *pos == 0 ? &c_start : NULL; 361} 362 363static void *c_next(struct seq_file *m, void *v, loff_t *pos) 364{ 365 ++*pos; 366 return c_start(m, pos); 367} 368 369static void c_stop(struct seq_file *m, void *v) 370{ 371} 372 373const struct seq_operations cpuinfo_op = { 374 .start =c_start, 375 .next = c_next, 376 .stop = c_stop, 377 .show = show_cpuinfo, 378}; 379 380extern int stop_a_enabled; 381 382void sun_do_break(void) 383{ 384 if (!stop_a_enabled) 385 return; 386 387 printk("\n"); 388 flush_user_windows(); 389 390 prom_cmdline(); 391} 392EXPORT_SYMBOL(sun_do_break); 393 394int stop_a_enabled = 1; 395 396static int __init topology_init(void) 397{ 398 int i, ncpus, err; 399 400 /* Count the number of physically present processors in 401 * the machine, even on uniprocessor, so that /proc/cpuinfo 402 * output is consistent with 2.4.x 403 */ 404 ncpus = 0; 405 while (!cpu_find_by_instance(ncpus, NULL, NULL)) 406 ncpus++; 407 ncpus_probed = ncpus; 408 409 err = 0; 410 for_each_online_cpu(i) { 411 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); 412 if (!p) 413 err = -ENOMEM; 414 else 415 register_cpu(p, i); 416 } 417 418 return err; 419} 420 421subsys_initcall(topology_init); 422