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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 | /* * arch/s390/kernel/setup.c * * S390 version * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation * Author(s): Hartmut Penner (hp@de.ibm.com), * Martin Schwidefsky (schwidefsky@de.ibm.com) * * Derived from "arch/i386/kernel/setup.c" * Copyright (C) 1995, Linus Torvalds */ /* * This file handles the architecture-dependent parts of initialization */ #include <linux/errno.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/ptrace.h> #include <linux/slab.h> #include <linux/user.h> #include <linux/a.out.h> #include <linux/tty.h> #include <linux/ioport.h> #include <linux/delay.h> #include <linux/config.h> #include <linux/init.h> #ifdef CONFIG_BLK_DEV_RAM #include <linux/blk.h> #endif #include <linux/bootmem.h> #include <linux/console.h> #include <asm/uaccess.h> #include <asm/system.h> #include <asm/smp.h> #include <asm/mmu_context.h> #include <asm/cpcmd.h> /* * Machine setup.. */ unsigned long memory_size = 0; unsigned long machine_flags = 0; __u16 boot_cpu_addr; int cpus_initialized = 0; unsigned long cpu_initialized = 0; volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ /* * Setup options */ extern int _text,_etext, _edata, _end; /* * This is set up by the setup-routine at boot-time * for S390 need to find out, what we have to setup * using address 0x10400 ... */ #include <asm/setup.h> static char command_line[COMMAND_LINE_SIZE] = { 0, }; char saved_command_line[COMMAND_LINE_SIZE]; static struct resource code_resource = { "Kernel code", 0x100000, 0 }; static struct resource data_resource = { "Kernel data", 0, 0 }; /* * cpu_init() initializes state that is per-CPU. */ void __init cpu_init (void) { int nr = smp_processor_id(); int addr = hard_smp_processor_id(); if (test_and_set_bit(nr,&cpu_initialized)) { printk("CPU#%d ALREADY INITIALIZED!!!!!!!!!\n", nr); for (;;) __sti(); } cpus_initialized++; /* * Store processor id in lowcore (used e.g. in timer_interrupt) */ asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id)); S390_lowcore.cpu_data.cpu_addr = addr; S390_lowcore.cpu_data.cpu_nr = nr; /* * Force FPU initialization: */ current->flags &= ~PF_USEDFPU; current->used_math = 0; /* Setup active_mm for idle_task */ atomic_inc(&init_mm.mm_count); current->active_mm = &init_mm; if (current->mm) BUG(); enter_lazy_tlb(&init_mm, current, nr); } /* * VM halt and poweroff setup routines */ char vmhalt_cmd[128] = ""; char vmpoff_cmd[128] = ""; static inline void strncpy_skip_quote(char *dst, char *src, int n) { int sx, dx; dx = 0; for (sx = 0; src[sx] != 0; sx++) { if (src[sx] == '"') continue; dst[dx++] = src[sx]; if (dx >= n) break; } } static int __init vmhalt_setup(char *str) { strncpy_skip_quote(vmhalt_cmd, str, 127); vmhalt_cmd[127] = 0; return 1; } __setup("vmhalt=", vmhalt_setup); static int __init vmpoff_setup(char *str) { strncpy_skip_quote(vmpoff_cmd, str, 127); vmpoff_cmd[127] = 0; return 1; } __setup("vmpoff=", vmpoff_setup); /* * Reboot, halt and power_off routines for non SMP. */ #ifndef CONFIG_SMP void machine_restart(char * __unused) { reipl(S390_lowcore.ipl_device); } void machine_halt(void) { if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) cpcmd(vmhalt_cmd, NULL, 0); signal_processor(smp_processor_id(), sigp_stop_and_store_status); } void machine_power_off(void) { if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) cpcmd(vmpoff_cmd, NULL, 0); signal_processor(smp_processor_id(), sigp_stop_and_store_status); } #endif /* * Setup function called from init/main.c just after the banner * was printed. */ void __init setup_arch(char **cmdline_p) { unsigned long bootmap_size; unsigned long memory_start, memory_end; char c = ' ', cn, *to = command_line, *from = COMMAND_LINE; struct resource *res; unsigned long start_pfn, end_pfn; static unsigned int smptrap=0; unsigned long delay = 0; if (smptrap) return; smptrap=1; printk("Command line is: %s\n", COMMAND_LINE); /* * Setup lowcore information for boot cpu */ cpu_init(); boot_cpu_addr = S390_lowcore.cpu_data.cpu_addr; __cpu_logical_map[0] = boot_cpu_addr; /* * print what head.S has found out about the machine */ printk((MACHINE_IS_VM) ? "We are running under VM\n" : "We are running native\n"); printk((MACHINE_HAS_IEEE) ? "This machine has an IEEE fpu\n" : "This machine has no IEEE fpu\n"); ROOT_DEV = to_kdev_t(0x0100); memory_start = (unsigned long) &_end; /* fixit if use $CODELO etc*/ memory_end = memory_size; /* * We need some free virtual space to be able to do vmalloc. * On a machine with 2GB memory we make sure that we have at * least 128 MB free space for vmalloc. */ if (memory_end > 1920*1024*1024) memory_end = 1920*1024*1024; init_mm.start_code = PAGE_OFFSET; init_mm.end_code = (unsigned long) &_etext; init_mm.end_data = (unsigned long) &_edata; init_mm.brk = (unsigned long) &_end; code_resource.start = (unsigned long) &_text; code_resource.end = (unsigned long) &_etext - 1; data_resource.start = (unsigned long) &_etext; data_resource.end = (unsigned long) &_edata - 1; /* Save unparsed command line copy for /proc/cmdline */ memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; for (;;) { /* * "mem=XXX[kKmM]" sets memsize */ if (c == ' ' && strncmp(from, "mem=", 4) == 0) { memory_end = simple_strtoul(from+4, &from, 0); if ( *from == 'K' || *from == 'k' ) { memory_end = memory_end << 10; from++; } else if ( *from == 'M' || *from == 'm' ) { memory_end = memory_end << 20; from++; } } /* * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes */ if (c == ' ' && strncmp(from, "ipldelay=", 9) == 0) { if (to != command_line) to--; delay = simple_strtoul(from+9, &from, 0); if (*from == 's' || *from == 'S') { delay = delay*1000000; from++; } else if (*from == 'm' || *from == 'M') { delay = delay*60*1000000; from++; } /* now wait for the requestedn amount of time */ udelay(delay); } cn = *(from++); if (!cn) break; if (cn == '\n') cn = ' '; /* replace newlines with space */ if (cn == ' ' && c == ' ') continue; /* remove additional spaces */ c = cn; if (to - command_line >= COMMAND_LINE_SIZE) break; *(to++) = c; } if (c == ' ' && to > command_line) to--; *to = '\0'; *cmdline_p = command_line; /* * partially used pages are not usable - thus * we are rounding upwards: */ start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT; end_pfn = memory_end >> PAGE_SHIFT; /* * Initialize the boot-time allocator (with low memory only): */ bootmap_size = init_bootmem(start_pfn, end_pfn); /* * Register RAM pages with the bootmem allocator. */ free_bootmem(start_pfn << PAGE_SHIFT, (end_pfn - start_pfn) << PAGE_SHIFT); /* * Reserve the bootmem bitmap itself as well. We do this in two * steps (first step was init_bootmem()) because this catches * the (very unlikely) case of us accidentally initializing the * bootmem allocator with an invalid RAM area. */ reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); #ifdef CONFIG_BLK_DEV_INITRD if (INITRD_START) { if (INITRD_START + INITRD_SIZE <= memory_end) { reserve_bootmem(INITRD_START, INITRD_SIZE); initrd_start = INITRD_START; initrd_end = initrd_start + INITRD_SIZE; } else { printk("initrd extends beyond end of memory " "(0x%08lx > 0x%08lx)\ndisabling initrd\n", initrd_start + INITRD_SIZE, memory_end); initrd_start = initrd_end = 0; } } #endif paging_init(); res = alloc_bootmem_low(sizeof(struct resource)); res->start = 0; res->end = memory_end; res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; request_resource(&iomem_resource, res); request_resource(res, &code_resource); request_resource(res, &data_resource); } void print_cpu_info(struct cpuinfo_S390 *cpuinfo) { printk("cpu %d " #ifdef CONFIG_SMP "phys_idx=%d " #endif "vers=%02X ident=%06X machine=%04X unused=%04X\n", cpuinfo->cpu_nr, #ifdef CONFIG_SMP cpuinfo->cpu_addr, #endif cpuinfo->cpu_id.version, cpuinfo->cpu_id.ident, cpuinfo->cpu_id.machine, cpuinfo->cpu_id.unused); } /* * Get CPU information for use by the procfs. */ int get_cpuinfo(char * buffer) { struct cpuinfo_S390 *cpuinfo; char *p = buffer; int i; p += sprintf(p,"vendor_id : IBM/S390\n" "# processors : %i\n" "bogomips per cpu: %lu.%02lu\n", smp_num_cpus, loops_per_jiffy/(500000/HZ), (loops_per_jiffy/(5000/HZ))%100); for (i = 0; i < smp_num_cpus; i++) { cpuinfo = &safe_get_cpu_lowcore(i).cpu_data; p += sprintf(p,"processor %i: " "version = %02X, " "identification = %06X, " "machine = %04X\n", i, cpuinfo->cpu_id.version, cpuinfo->cpu_id.ident, cpuinfo->cpu_id.machine); } return p - buffer; } |