1 /* 2 * linux/arch/sparc64/kernel/setup.c 3 * 4 * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu) 5 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 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 <asm/smp.h> 17 #include <linux/user.h> 18 #include <linux/screen_info.h> 19 #include <linux/delay.h> 20 #include <linux/fs.h> 21 #include <linux/seq_file.h> 22 #include <linux/syscalls.h> 23 #include <linux/kdev_t.h> 24 #include <linux/major.h> 25 #include <linux/string.h> 26 #include <linux/init.h> 27 #include <linux/inet.h> 28 #include <linux/console.h> 29 #include <linux/root_dev.h> 30 #include <linux/interrupt.h> 31 #include <linux/cpu.h> 32 #include <linux/initrd.h> 33 34 #include <asm/system.h> 35 #include <asm/io.h> 36 #include <asm/processor.h> 37 #include <asm/oplib.h> 38 #include <asm/page.h> 39 #include <asm/pgtable.h> 40 #include <asm/idprom.h> 41 #include <asm/head.h> 42 #include <asm/starfire.h> 43 #include <asm/mmu_context.h> 44 #include <asm/timer.h> 45 #include <asm/sections.h> 46 #include <asm/setup.h> 47 #include <asm/mmu.h> 48 #include <asm/ns87303.h> 49 50 #ifdef CONFIG_IP_PNP 51 #include <net/ipconfig.h> 52 #endif 53 54 #include "entry.h" 55 #include "kernel.h" 56 57 /* Used to synchronize accesses to NatSemi SUPER I/O chip configure 58 * operations in asm/ns87303.h 59 */ 60 DEFINE_SPINLOCK(ns87303_lock); 61 62 struct screen_info screen_info = { 63 0, 0, /* orig-x, orig-y */ 64 0, /* unused */ 65 0, /* orig-video-page */ 66 0, /* orig-video-mode */ 67 128, /* orig-video-cols */ 68 0, 0, 0, /* unused, ega_bx, unused */ 69 54, /* orig-video-lines */ 70 0, /* orig-video-isVGA */ 71 16 /* orig-video-points */ 72 }; 73 74 static void 75 prom_console_write(struct console *con, const char *s, unsigned n) 76 { 77 prom_write(s, n); 78 } 79 80 /* Exported for mm/init.c:paging_init. */ 81 unsigned long cmdline_memory_size = 0; 82 83 static struct console prom_early_console = { 84 .name = "earlyprom", 85 .write = prom_console_write, 86 .flags = CON_PRINTBUFFER | CON_BOOT | CON_ANYTIME, 87 .index = -1, 88 }; 89 90 /* 91 * Process kernel command line switches that are specific to the 92 * SPARC or that require special low-level processing. 93 */ 94 static void __init process_switch(char c) 95 { 96 switch (c) { 97 case 'd': 98 case 's': 99 break; 100 case 'h': 101 prom_printf("boot_flags_init: Halt!\n"); 102 prom_halt(); 103 break; 104 case 'p': 105 /* Just ignore, this behavior is now the default. */ 106 break; 107 case 'P': 108 /* Force UltraSPARC-III P-Cache on. */ 109 if (tlb_type != cheetah) { 110 printk("BOOT: Ignoring P-Cache force option.\n"); 111 break; 112 } 113 cheetah_pcache_forced_on = 1; 114 add_taint(TAINT_MACHINE_CHECK); 115 cheetah_enable_pcache(); 116 break; 117 118 default: 119 printk("Unknown boot switch (-%c)\n", c); 120 break; 121 } 122 } 123 124 static void __init boot_flags_init(char *commands) 125 { 126 while (*commands) { 127 /* Move to the start of the next "argument". */ 128 while (*commands && *commands == ' ') 129 commands++; 130 131 /* Process any command switches, otherwise skip it. */ 132 if (*commands == '\0') 133 break; 134 if (*commands == '-') { 135 commands++; 136 while (*commands && *commands != ' ') 137 process_switch(*commands++); 138 continue; 139 } 140 if (!strncmp(commands, "mem=", 4)) { 141 /* 142 * "mem=XXX[kKmM]" overrides the PROM-reported 143 * memory size. 144 */ 145 cmdline_memory_size = simple_strtoul(commands + 4, 146 &commands, 0); 147 if (*commands == 'K' || *commands == 'k') { 148 cmdline_memory_size <<= 10; 149 commands++; 150 } else if (*commands=='M' || *commands=='m') { 151 cmdline_memory_size <<= 20; 152 commands++; 153 } 154 } 155 while (*commands && *commands != ' ') 156 commands++; 157 } 158 } 159 160 extern unsigned short root_flags; 161 extern unsigned short root_dev; 162 extern unsigned short ram_flags; 163 #define RAMDISK_IMAGE_START_MASK 0x07FF 164 #define RAMDISK_PROMPT_FLAG 0x8000 165 #define RAMDISK_LOAD_FLAG 0x4000 166 167 extern int root_mountflags; 168 169 char reboot_command[COMMAND_LINE_SIZE]; 170 171 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 }; 172 173 void __init per_cpu_patch(void) 174 { 175 struct cpuid_patch_entry *p; 176 unsigned long ver; 177 int is_jbus; 178 179 if (tlb_type == spitfire && !this_is_starfire) 180 return; 181 182 is_jbus = 0; 183 if (tlb_type != hypervisor) { 184 __asm__ ("rdpr %%ver, %0" : "=r" (ver)); 185 is_jbus = ((ver >> 32UL) == __JALAPENO_ID || 186 (ver >> 32UL) == __SERRANO_ID); 187 } 188 189 p = &__cpuid_patch; 190 while (p < &__cpuid_patch_end) { 191 unsigned long addr = p->addr; 192 unsigned int *insns; 193 194 switch (tlb_type) { 195 case spitfire: 196 insns = &p->starfire[0]; 197 break; 198 case cheetah: 199 case cheetah_plus: 200 if (is_jbus) 201 insns = &p->cheetah_jbus[0]; 202 else 203 insns = &p->cheetah_safari[0]; 204 break; 205 case hypervisor: 206 insns = &p->sun4v[0]; 207 break; 208 default: 209 prom_printf("Unknown cpu type, halting.\n"); 210 prom_halt(); 211 }; 212 213 *(unsigned int *) (addr + 0) = insns[0]; 214 wmb(); 215 __asm__ __volatile__("flush %0" : : "r" (addr + 0)); 216 217 *(unsigned int *) (addr + 4) = insns[1]; 218 wmb(); 219 __asm__ __volatile__("flush %0" : : "r" (addr + 4)); 220 221 *(unsigned int *) (addr + 8) = insns[2]; 222 wmb(); 223 __asm__ __volatile__("flush %0" : : "r" (addr + 8)); 224 225 *(unsigned int *) (addr + 12) = insns[3]; 226 wmb(); 227 __asm__ __volatile__("flush %0" : : "r" (addr + 12)); 228 229 p++; 230 } 231 } 232 233 void __init sun4v_patch(void) 234 { 235 extern void sun4v_hvapi_init(void); 236 struct sun4v_1insn_patch_entry *p1; 237 struct sun4v_2insn_patch_entry *p2; 238 239 if (tlb_type != hypervisor) 240 return; 241 242 p1 = &__sun4v_1insn_patch; 243 while (p1 < &__sun4v_1insn_patch_end) { 244 unsigned long addr = p1->addr; 245 246 *(unsigned int *) (addr + 0) = p1->insn; 247 wmb(); 248 __asm__ __volatile__("flush %0" : : "r" (addr + 0)); 249 250 p1++; 251 } 252 253 p2 = &__sun4v_2insn_patch; 254 while (p2 < &__sun4v_2insn_patch_end) { 255 unsigned long addr = p2->addr; 256 257 *(unsigned int *) (addr + 0) = p2->insns[0]; 258 wmb(); 259 __asm__ __volatile__("flush %0" : : "r" (addr + 0)); 260 261 *(unsigned int *) (addr + 4) = p2->insns[1]; 262 wmb(); 263 __asm__ __volatile__("flush %0" : : "r" (addr + 4)); 264 265 p2++; 266 } 267 268 sun4v_hvapi_init(); 269 } 270 271 #ifdef CONFIG_SMP 272 void __init boot_cpu_id_too_large(int cpu) 273 { 274 prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n", 275 cpu, NR_CPUS); 276 prom_halt(); 277 } 278 #endif 279 280 void __init setup_arch(char **cmdline_p) 281 { 282 /* Initialize PROM console and command line. */ 283 *cmdline_p = prom_getbootargs(); 284 strcpy(boot_command_line, *cmdline_p); 285 parse_early_param(); 286 287 boot_flags_init(*cmdline_p); 288 register_console(&prom_early_console); 289 290 if (tlb_type == hypervisor) 291 printk("ARCH: SUN4V\n"); 292 else 293 printk("ARCH: SUN4U\n"); 294 295 #ifdef CONFIG_DUMMY_CONSOLE 296 conswitchp = &dummy_con; 297 #elif defined(CONFIG_PROM_CONSOLE) 298 conswitchp = &prom_con; 299 #endif 300 301 idprom_init(); 302 303 if (!root_flags) 304 root_mountflags &= ~MS_RDONLY; 305 ROOT_DEV = old_decode_dev(root_dev); 306 #ifdef CONFIG_BLK_DEV_RAM 307 rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; 308 rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); 309 rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); 310 #endif 311 312 task_thread_info(&init_task)->kregs = &fake_swapper_regs; 313 314 #ifdef CONFIG_IP_PNP 315 if (!ic_set_manually) { 316 int chosen = prom_finddevice ("/chosen"); 317 u32 cl, sv, gw; 318 319 cl = prom_getintdefault (chosen, "client-ip", 0); 320 sv = prom_getintdefault (chosen, "server-ip", 0); 321 gw = prom_getintdefault (chosen, "gateway-ip", 0); 322 if (cl && sv) { 323 ic_myaddr = cl; 324 ic_servaddr = sv; 325 if (gw) 326 ic_gateway = gw; 327 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP) 328 ic_proto_enabled = 0; 329 #endif 330 } 331 } 332 #endif 333 334 /* Get boot processor trap_block[] setup. */ 335 init_cur_cpu_trap(current_thread_info()); 336 337 paging_init(); 338 } 339 340 /* BUFFER is PAGE_SIZE bytes long. */ 341 342 extern void smp_info(struct seq_file *); 343 extern void smp_bogo(struct seq_file *); 344 extern void mmu_info(struct seq_file *); 345 346 unsigned int dcache_parity_tl1_occurred; 347 unsigned int icache_parity_tl1_occurred; 348 349 int ncpus_probed; 350 351 static int show_cpuinfo(struct seq_file *m, void *__unused) 352 { 353 seq_printf(m, 354 "cpu\t\t: %s\n" 355 "fpu\t\t: %s\n" 356 "prom\t\t: %s\n" 357 "type\t\t: %s\n" 358 "ncpus probed\t: %d\n" 359 "ncpus active\t: %d\n" 360 "D$ parity tl1\t: %u\n" 361 "I$ parity tl1\t: %u\n" 362 #ifndef CONFIG_SMP 363 "Cpu0ClkTck\t: %016lx\n" 364 #endif 365 , 366 sparc_cpu_type, 367 sparc_fpu_type, 368 prom_version, 369 ((tlb_type == hypervisor) ? 370 "sun4v" : 371 "sun4u"), 372 ncpus_probed, 373 num_online_cpus(), 374 dcache_parity_tl1_occurred, 375 icache_parity_tl1_occurred 376 #ifndef CONFIG_SMP 377 , cpu_data(0).clock_tick 378 #endif 379 ); 380 #ifdef CONFIG_SMP 381 smp_bogo(m); 382 #endif 383 mmu_info(m); 384 #ifdef CONFIG_SMP 385 smp_info(m); 386 #endif 387 return 0; 388 } 389 390 static void *c_start(struct seq_file *m, loff_t *pos) 391 { 392 /* The pointer we are returning is arbitrary, 393 * it just has to be non-NULL and not IS_ERR 394 * in the success case. 395 */ 396 return *pos == 0 ? &c_start : NULL; 397 } 398 399 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 400 { 401 ++*pos; 402 return c_start(m, pos); 403 } 404 405 static void c_stop(struct seq_file *m, void *v) 406 { 407 } 408 409 const struct seq_operations cpuinfo_op = { 410 .start =c_start, 411 .next = c_next, 412 .stop = c_stop, 413 .show = show_cpuinfo, 414 }; 415 416 extern int stop_a_enabled; 417 418 void sun_do_break(void) 419 { 420 if (!stop_a_enabled) 421 return; 422 423 prom_printf("\n"); 424 flush_user_windows(); 425 426 prom_cmdline(); 427 } 428 429 int stop_a_enabled = 1; 430