1 /* 2 * Initial setup-routines for HP 9000 based hardware. 3 * 4 * Copyright (C) 1991, 1992, 1995 Linus Torvalds 5 * Modifications for PA-RISC (C) 1999-2008 Helge Deller <deller@gmx.de> 6 * Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) 7 * Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net> 8 * Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org> 9 * Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net> 10 * 11 * Initial PA-RISC Version: 04-23-1999 by Helge Deller 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2, or (at your option) 16 * any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 26 * 27 */ 28 #include <linux/delay.h> 29 #include <linux/init.h> 30 #include <linux/mm.h> 31 #include <linux/module.h> 32 #include <linux/seq_file.h> 33 #include <linux/random.h> 34 #include <linux/slab.h> 35 #include <linux/cpu.h> 36 #include <asm/param.h> 37 #include <asm/cache.h> 38 #include <asm/hardware.h> /* for register_parisc_driver() stuff */ 39 #include <asm/processor.h> 40 #include <asm/page.h> 41 #include <asm/pdc.h> 42 #include <asm/pdcpat.h> 43 #include <asm/irq.h> /* for struct irq_region */ 44 #include <asm/parisc-device.h> 45 46 struct system_cpuinfo_parisc boot_cpu_data __read_mostly; 47 EXPORT_SYMBOL(boot_cpu_data); 48 #ifdef CONFIG_PA8X00 49 int _parisc_requires_coherency __read_mostly; 50 EXPORT_SYMBOL(_parisc_requires_coherency); 51 #endif 52 53 DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data); 54 55 /* 56 ** PARISC CPU driver - claim "device" and initialize CPU data structures. 57 ** 58 ** Consolidate per CPU initialization into (mostly) one module. 59 ** Monarch CPU will initialize boot_cpu_data which shouldn't 60 ** change once the system has booted. 61 ** 62 ** The callback *should* do per-instance initialization of 63 ** everything including the monarch. "Per CPU" init code in 64 ** setup.c:start_parisc() has migrated here and start_parisc() 65 ** will call register_parisc_driver(&cpu_driver) before calling do_inventory(). 66 ** 67 ** The goal of consolidating CPU initialization into one place is 68 ** to make sure all CPUs get initialized the same way. 69 ** The code path not shared is how PDC hands control of the CPU to the OS. 70 ** The initialization of OS data structures is the same (done below). 71 */ 72 73 /** 74 * init_cpu_profiler - enable/setup per cpu profiling hooks. 75 * @cpunum: The processor instance. 76 * 77 * FIXME: doesn't do much yet... 78 */ 79 static void 80 init_percpu_prof(unsigned long cpunum) 81 { 82 } 83 84 85 /** 86 * processor_probe - Determine if processor driver should claim this device. 87 * @dev: The device which has been found. 88 * 89 * Determine if processor driver should claim this chip (return 0) or not 90 * (return 1). If so, initialize the chip and tell other partners in crime 91 * they have work to do. 92 */ 93 static int __init processor_probe(struct parisc_device *dev) 94 { 95 unsigned long txn_addr; 96 unsigned long cpuid; 97 struct cpuinfo_parisc *p; 98 struct pdc_pat_cpu_num cpu_info = { }; 99 100 #ifdef CONFIG_SMP 101 if (num_online_cpus() >= nr_cpu_ids) { 102 printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n"); 103 return 1; 104 } 105 #else 106 if (boot_cpu_data.cpu_count > 0) { 107 printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n"); 108 return 1; 109 } 110 #endif 111 112 /* logical CPU ID and update global counter 113 * May get overwritten by PAT code. 114 */ 115 cpuid = boot_cpu_data.cpu_count; 116 txn_addr = dev->hpa.start; /* for legacy PDC */ 117 cpu_info.cpu_num = cpu_info.cpu_loc = cpuid; 118 119 #ifdef CONFIG_64BIT 120 if (is_pdc_pat()) { 121 ulong status; 122 unsigned long bytecnt; 123 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; 124 125 pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL); 126 if (!pa_pdc_cell) 127 panic("couldn't allocate memory for PDC_PAT_CELL!"); 128 129 status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc, 130 dev->mod_index, PA_VIEW, pa_pdc_cell); 131 132 BUG_ON(PDC_OK != status); 133 134 /* verify it's the same as what do_pat_inventory() found */ 135 BUG_ON(dev->mod_info != pa_pdc_cell->mod_info); 136 BUG_ON(dev->pmod_loc != pa_pdc_cell->mod_location); 137 138 txn_addr = pa_pdc_cell->mod[0]; /* id_eid for IO sapic */ 139 140 kfree(pa_pdc_cell); 141 142 /* get the cpu number */ 143 status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start); 144 BUG_ON(PDC_OK != status); 145 146 pr_info("Logical CPU #%lu is physical cpu #%lu at location " 147 "0x%lx with hpa %pa\n", 148 cpuid, cpu_info.cpu_num, cpu_info.cpu_loc, 149 &dev->hpa.start); 150 151 #undef USE_PAT_CPUID 152 #ifdef USE_PAT_CPUID 153 /* We need contiguous numbers for cpuid. Firmware's notion 154 * of cpuid is for physical CPUs and we just don't care yet. 155 * We'll care when we need to query PAT PDC about a CPU *after* 156 * boot time (ie shutdown a CPU from an OS perspective). 157 */ 158 if (cpu_info.cpu_num >= NR_CPUS) { 159 printk(KERN_WARNING "IGNORING CPU at %pa," 160 " cpu_slot_id > NR_CPUS" 161 " (%ld > %d)\n", 162 &dev->hpa.start, cpu_info.cpu_num, NR_CPUS); 163 /* Ignore CPU since it will only crash */ 164 boot_cpu_data.cpu_count--; 165 return 1; 166 } else { 167 cpuid = cpu_info.cpu_num; 168 } 169 #endif 170 } 171 #endif 172 173 p = &per_cpu(cpu_data, cpuid); 174 boot_cpu_data.cpu_count++; 175 176 /* initialize counters - CPU 0 gets it_value set in time_init() */ 177 if (cpuid) 178 memset(p, 0, sizeof(struct cpuinfo_parisc)); 179 180 p->loops_per_jiffy = loops_per_jiffy; 181 p->dev = dev; /* Save IODC data in case we need it */ 182 p->hpa = dev->hpa.start; /* save CPU hpa */ 183 p->cpuid = cpuid; /* save CPU id */ 184 p->txn_addr = txn_addr; /* save CPU IRQ address */ 185 p->cpu_num = cpu_info.cpu_num; 186 p->cpu_loc = cpu_info.cpu_loc; 187 #ifdef CONFIG_SMP 188 /* 189 ** FIXME: review if any other initialization is clobbered 190 ** for boot_cpu by the above memset(). 191 */ 192 init_percpu_prof(cpuid); 193 #endif 194 195 /* 196 ** CONFIG_SMP: init_smp_config() will attempt to get CPUs into 197 ** OS control. RENDEZVOUS is the default state - see mem_set above. 198 ** p->state = STATE_RENDEZVOUS; 199 */ 200 201 #if 0 202 /* CPU 0 IRQ table is statically allocated/initialized */ 203 if (cpuid) { 204 struct irqaction actions[]; 205 206 /* 207 ** itimer and ipi IRQ handlers are statically initialized in 208 ** arch/parisc/kernel/irq.c. ie Don't need to register them. 209 */ 210 actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC); 211 if (!actions) { 212 /* not getting it's own table, share with monarch */ 213 actions = cpu_irq_actions[0]; 214 } 215 216 cpu_irq_actions[cpuid] = actions; 217 } 218 #endif 219 220 /* 221 * Bring this CPU up now! (ignore bootstrap cpuid == 0) 222 */ 223 #ifdef CONFIG_SMP 224 if (cpuid) { 225 set_cpu_present(cpuid, true); 226 cpu_up(cpuid); 227 } 228 #endif 229 230 return 0; 231 } 232 233 /** 234 * collect_boot_cpu_data - Fill the boot_cpu_data structure. 235 * 236 * This function collects and stores the generic processor information 237 * in the boot_cpu_data structure. 238 */ 239 void __init collect_boot_cpu_data(void) 240 { 241 unsigned long cr16_seed; 242 243 memset(&boot_cpu_data, 0, sizeof(boot_cpu_data)); 244 245 cr16_seed = get_cycles(); 246 add_device_randomness(&cr16_seed, sizeof(cr16_seed)); 247 248 boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */ 249 250 /* get CPU-Model Information... */ 251 #define p ((unsigned long *)&boot_cpu_data.pdc.model) 252 if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK) { 253 printk(KERN_INFO 254 "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", 255 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]); 256 257 add_device_randomness(&boot_cpu_data.pdc.model, 258 sizeof(boot_cpu_data.pdc.model)); 259 } 260 #undef p 261 262 if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK) { 263 printk(KERN_INFO "vers %08lx\n", 264 boot_cpu_data.pdc.versions); 265 266 add_device_randomness(&boot_cpu_data.pdc.versions, 267 sizeof(boot_cpu_data.pdc.versions)); 268 } 269 270 if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) { 271 printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n", 272 (boot_cpu_data.pdc.cpuid >> 5) & 127, 273 boot_cpu_data.pdc.cpuid & 31, 274 boot_cpu_data.pdc.cpuid); 275 276 add_device_randomness(&boot_cpu_data.pdc.cpuid, 277 sizeof(boot_cpu_data.pdc.cpuid)); 278 } 279 280 if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK) 281 printk(KERN_INFO "capabilities 0x%lx\n", 282 boot_cpu_data.pdc.capabilities); 283 284 if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK) 285 printk(KERN_INFO "model %s\n", 286 boot_cpu_data.pdc.sys_model_name); 287 288 boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion; 289 boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion; 290 291 boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion); 292 boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0]; 293 boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1]; 294 295 #ifdef CONFIG_PA8X00 296 _parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) || 297 (boot_cpu_data.cpu_type == mako2); 298 #endif 299 } 300 301 302 /** 303 * init_per_cpu - Handle individual processor initializations. 304 * @cpunum: logical processor number. 305 * 306 * This function handles initialization for *every* CPU 307 * in the system: 308 * 309 * o Set "default" CPU width for trap handlers 310 * 311 * o Enable FP coprocessor 312 * REVISIT: this could be done in the "code 22" trap handler. 313 * (frowands idea - that way we know which processes need FP 314 * registers saved on the interrupt stack.) 315 * NEWS FLASH: wide kernels need FP coprocessor enabled to handle 316 * formatted printing of %lx for example (double divides I think) 317 * 318 * o Enable CPU profiling hooks. 319 */ 320 int __init init_per_cpu(int cpunum) 321 { 322 int ret; 323 struct pdc_coproc_cfg coproc_cfg; 324 325 set_firmware_width(); 326 ret = pdc_coproc_cfg(&coproc_cfg); 327 328 if(ret >= 0 && coproc_cfg.ccr_functional) { 329 mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */ 330 331 /* FWIW, FP rev/model is a more accurate way to determine 332 ** CPU type. CPU rev/model has some ambiguous cases. 333 */ 334 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision; 335 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 336 337 if (cpunum == 0) 338 printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n", 339 cpunum, coproc_cfg.revision, coproc_cfg.model); 340 341 /* 342 ** store status register to stack (hopefully aligned) 343 ** and clear the T-bit. 344 */ 345 asm volatile ("fstd %fr0,8(%sp)"); 346 347 } else { 348 printk(KERN_WARNING "WARNING: No FP CoProcessor?!" 349 " (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n" 350 #ifdef CONFIG_64BIT 351 "Halting Machine - FP required\n" 352 #endif 353 , coproc_cfg.ccr_functional); 354 #ifdef CONFIG_64BIT 355 mdelay(100); /* previous chars get pushed to console */ 356 panic("FP CoProc not reported"); 357 #endif 358 } 359 360 /* FUTURE: Enable Performance Monitor : ccr bit 0x20 */ 361 init_percpu_prof(cpunum); 362 363 return ret; 364 } 365 366 /* 367 * Display CPU info for all CPUs. 368 */ 369 int 370 show_cpuinfo (struct seq_file *m, void *v) 371 { 372 unsigned long cpu; 373 374 for_each_online_cpu(cpu) { 375 const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu); 376 #ifdef CONFIG_SMP 377 if (0 == cpuinfo->hpa) 378 continue; 379 #endif 380 seq_printf(m, "processor\t: %lu\n" 381 "cpu family\t: PA-RISC %s\n", 382 cpu, boot_cpu_data.family_name); 383 384 seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name ); 385 386 /* cpu MHz */ 387 seq_printf(m, "cpu MHz\t\t: %d.%06d\n", 388 boot_cpu_data.cpu_hz / 1000000, 389 boot_cpu_data.cpu_hz % 1000000 ); 390 391 seq_printf(m, "capabilities\t:"); 392 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32) 393 seq_puts(m, " os32"); 394 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64) 395 seq_puts(m, " os64"); 396 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC) 397 seq_puts(m, " iopdir_fdc"); 398 switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) { 399 case PDC_MODEL_NVA_SUPPORTED: 400 seq_puts(m, " nva_supported"); 401 break; 402 case PDC_MODEL_NVA_SLOW: 403 seq_puts(m, " nva_slow"); 404 break; 405 case PDC_MODEL_NVA_UNSUPPORTED: 406 seq_puts(m, " needs_equivalent_aliasing"); 407 break; 408 } 409 seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities); 410 411 seq_printf(m, "model\t\t: %s\n" 412 "model name\t: %s\n", 413 boot_cpu_data.pdc.sys_model_name, 414 cpuinfo->dev ? 415 cpuinfo->dev->name : "Unknown"); 416 417 seq_printf(m, "hversion\t: 0x%08x\n" 418 "sversion\t: 0x%08x\n", 419 boot_cpu_data.hversion, 420 boot_cpu_data.sversion ); 421 422 /* print cachesize info */ 423 show_cache_info(m); 424 425 seq_printf(m, "bogomips\t: %lu.%02lu\n", 426 cpuinfo->loops_per_jiffy / (500000 / HZ), 427 (cpuinfo->loops_per_jiffy / (5000 / HZ)) % 100); 428 429 seq_printf(m, "software id\t: %ld\n\n", 430 boot_cpu_data.pdc.model.sw_id); 431 } 432 return 0; 433 } 434 435 static const struct parisc_device_id processor_tbl[] __initconst = { 436 { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID }, 437 { 0, } 438 }; 439 440 static struct parisc_driver cpu_driver __refdata = { 441 .name = "CPU", 442 .id_table = processor_tbl, 443 .probe = processor_probe 444 }; 445 446 /** 447 * processor_init - Processor initialization procedure. 448 * 449 * Register this driver. 450 */ 451 void __init processor_init(void) 452 { 453 register_parisc_driver(&cpu_driver); 454 } 455