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; 187 188 store_cpu_topology(cpuid); 189 190 #ifdef CONFIG_SMP 191 /* 192 ** FIXME: review if any other initialization is clobbered 193 ** for boot_cpu by the above memset(). 194 */ 195 init_percpu_prof(cpuid); 196 #endif 197 198 /* 199 ** CONFIG_SMP: init_smp_config() will attempt to get CPUs into 200 ** OS control. RENDEZVOUS is the default state - see mem_set above. 201 ** p->state = STATE_RENDEZVOUS; 202 */ 203 204 #if 0 205 /* CPU 0 IRQ table is statically allocated/initialized */ 206 if (cpuid) { 207 struct irqaction actions[]; 208 209 /* 210 ** itimer and ipi IRQ handlers are statically initialized in 211 ** arch/parisc/kernel/irq.c. ie Don't need to register them. 212 */ 213 actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC); 214 if (!actions) { 215 /* not getting it's own table, share with monarch */ 216 actions = cpu_irq_actions[0]; 217 } 218 219 cpu_irq_actions[cpuid] = actions; 220 } 221 #endif 222 223 /* 224 * Bring this CPU up now! (ignore bootstrap cpuid == 0) 225 */ 226 #ifdef CONFIG_SMP 227 if (cpuid) { 228 set_cpu_present(cpuid, true); 229 cpu_up(cpuid); 230 } 231 #endif 232 233 return 0; 234 } 235 236 /** 237 * collect_boot_cpu_data - Fill the boot_cpu_data structure. 238 * 239 * This function collects and stores the generic processor information 240 * in the boot_cpu_data structure. 241 */ 242 void __init collect_boot_cpu_data(void) 243 { 244 unsigned long cr16_seed; 245 246 memset(&boot_cpu_data, 0, sizeof(boot_cpu_data)); 247 248 cr16_seed = get_cycles(); 249 add_device_randomness(&cr16_seed, sizeof(cr16_seed)); 250 251 boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */ 252 253 /* get CPU-Model Information... */ 254 #define p ((unsigned long *)&boot_cpu_data.pdc.model) 255 if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK) { 256 printk(KERN_INFO 257 "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", 258 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]); 259 260 add_device_randomness(&boot_cpu_data.pdc.model, 261 sizeof(boot_cpu_data.pdc.model)); 262 } 263 #undef p 264 265 if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK) { 266 printk(KERN_INFO "vers %08lx\n", 267 boot_cpu_data.pdc.versions); 268 269 add_device_randomness(&boot_cpu_data.pdc.versions, 270 sizeof(boot_cpu_data.pdc.versions)); 271 } 272 273 if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) { 274 printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n", 275 (boot_cpu_data.pdc.cpuid >> 5) & 127, 276 boot_cpu_data.pdc.cpuid & 31, 277 boot_cpu_data.pdc.cpuid); 278 279 add_device_randomness(&boot_cpu_data.pdc.cpuid, 280 sizeof(boot_cpu_data.pdc.cpuid)); 281 } 282 283 if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK) 284 printk(KERN_INFO "capabilities 0x%lx\n", 285 boot_cpu_data.pdc.capabilities); 286 287 if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK) 288 printk(KERN_INFO "model %s\n", 289 boot_cpu_data.pdc.sys_model_name); 290 291 dump_stack_set_arch_desc("%s", boot_cpu_data.pdc.sys_model_name); 292 293 boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion; 294 boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion; 295 296 boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion); 297 boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0]; 298 boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1]; 299 300 #ifdef CONFIG_PA8X00 301 _parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) || 302 (boot_cpu_data.cpu_type == mako2); 303 #endif 304 } 305 306 307 /** 308 * init_per_cpu - Handle individual processor initializations. 309 * @cpunum: logical processor number. 310 * 311 * This function handles initialization for *every* CPU 312 * in the system: 313 * 314 * o Set "default" CPU width for trap handlers 315 * 316 * o Enable FP coprocessor 317 * REVISIT: this could be done in the "code 22" trap handler. 318 * (frowands idea - that way we know which processes need FP 319 * registers saved on the interrupt stack.) 320 * NEWS FLASH: wide kernels need FP coprocessor enabled to handle 321 * formatted printing of %lx for example (double divides I think) 322 * 323 * o Enable CPU profiling hooks. 324 */ 325 int __init init_per_cpu(int cpunum) 326 { 327 int ret; 328 struct pdc_coproc_cfg coproc_cfg; 329 330 set_firmware_width(); 331 ret = pdc_coproc_cfg(&coproc_cfg); 332 333 store_cpu_topology(cpunum); 334 335 if(ret >= 0 && coproc_cfg.ccr_functional) { 336 mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */ 337 338 /* FWIW, FP rev/model is a more accurate way to determine 339 ** CPU type. CPU rev/model has some ambiguous cases. 340 */ 341 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision; 342 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 343 344 if (cpunum == 0) 345 printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n", 346 cpunum, coproc_cfg.revision, coproc_cfg.model); 347 348 /* 349 ** store status register to stack (hopefully aligned) 350 ** and clear the T-bit. 351 */ 352 asm volatile ("fstd %fr0,8(%sp)"); 353 354 } else { 355 printk(KERN_WARNING "WARNING: No FP CoProcessor?!" 356 " (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n" 357 #ifdef CONFIG_64BIT 358 "Halting Machine - FP required\n" 359 #endif 360 , coproc_cfg.ccr_functional); 361 #ifdef CONFIG_64BIT 362 mdelay(100); /* previous chars get pushed to console */ 363 panic("FP CoProc not reported"); 364 #endif 365 } 366 367 /* FUTURE: Enable Performance Monitor : ccr bit 0x20 */ 368 init_percpu_prof(cpunum); 369 370 return ret; 371 } 372 373 /* 374 * Display CPU info for all CPUs. 375 */ 376 int 377 show_cpuinfo (struct seq_file *m, void *v) 378 { 379 unsigned long cpu; 380 381 for_each_online_cpu(cpu) { 382 const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu); 383 #ifdef CONFIG_SMP 384 if (0 == cpuinfo->hpa) 385 continue; 386 #endif 387 seq_printf(m, "processor\t: %lu\n" 388 "cpu family\t: PA-RISC %s\n", 389 cpu, boot_cpu_data.family_name); 390 391 seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name ); 392 393 /* cpu MHz */ 394 seq_printf(m, "cpu MHz\t\t: %d.%06d\n", 395 boot_cpu_data.cpu_hz / 1000000, 396 boot_cpu_data.cpu_hz % 1000000 ); 397 398 #ifdef CONFIG_PARISC_CPU_TOPOLOGY 399 seq_printf(m, "physical id\t: %d\n", 400 topology_physical_package_id(cpu)); 401 seq_printf(m, "siblings\t: %d\n", 402 cpumask_weight(topology_core_cpumask(cpu))); 403 seq_printf(m, "core id\t\t: %d\n", topology_core_id(cpu)); 404 #endif 405 406 seq_printf(m, "capabilities\t:"); 407 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32) 408 seq_puts(m, " os32"); 409 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64) 410 seq_puts(m, " os64"); 411 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC) 412 seq_puts(m, " iopdir_fdc"); 413 switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) { 414 case PDC_MODEL_NVA_SUPPORTED: 415 seq_puts(m, " nva_supported"); 416 break; 417 case PDC_MODEL_NVA_SLOW: 418 seq_puts(m, " nva_slow"); 419 break; 420 case PDC_MODEL_NVA_UNSUPPORTED: 421 seq_puts(m, " needs_equivalent_aliasing"); 422 break; 423 } 424 seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities); 425 426 seq_printf(m, "model\t\t: %s\n" 427 "model name\t: %s\n", 428 boot_cpu_data.pdc.sys_model_name, 429 cpuinfo->dev ? 430 cpuinfo->dev->name : "Unknown"); 431 432 seq_printf(m, "hversion\t: 0x%08x\n" 433 "sversion\t: 0x%08x\n", 434 boot_cpu_data.hversion, 435 boot_cpu_data.sversion ); 436 437 /* print cachesize info */ 438 show_cache_info(m); 439 440 seq_printf(m, "bogomips\t: %lu.%02lu\n", 441 cpuinfo->loops_per_jiffy / (500000 / HZ), 442 (cpuinfo->loops_per_jiffy / (5000 / HZ)) % 100); 443 444 seq_printf(m, "software id\t: %ld\n\n", 445 boot_cpu_data.pdc.model.sw_id); 446 } 447 return 0; 448 } 449 450 static const struct parisc_device_id processor_tbl[] __initconst = { 451 { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID }, 452 { 0, } 453 }; 454 455 static struct parisc_driver cpu_driver __refdata = { 456 .name = "CPU", 457 .id_table = processor_tbl, 458 .probe = processor_probe 459 }; 460 461 /** 462 * processor_init - Processor initialization procedure. 463 * 464 * Register this driver. 465 */ 466 void __init processor_init(void) 467 { 468 register_parisc_driver(&cpu_driver); 469 } 470