1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Initial setup-routines for HP 9000 based hardware. 4 * 5 * Copyright (C) 1991, 1992, 1995 Linus Torvalds 6 * Modifications for PA-RISC (C) 1999-2008 Helge Deller <deller@gmx.de> 7 * Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) 8 * Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net> 9 * Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org> 10 * Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net> 11 * 12 * Initial PA-RISC Version: 04-23-1999 by Helge Deller 13 */ 14#include <linux/delay.h> 15#include <linux/init.h> 16#include <linux/mm.h> 17#include <linux/module.h> 18#include <linux/seq_file.h> 19#include <linux/random.h> 20#include <linux/slab.h> 21#include <linux/cpu.h> 22#include <asm/topology.h> 23#include <asm/param.h> 24#include <asm/cache.h> 25#include <asm/hardware.h> /* for register_parisc_driver() stuff */ 26#include <asm/processor.h> 27#include <asm/page.h> 28#include <asm/pdc.h> 29#include <asm/smp.h> 30#include <asm/pdcpat.h> 31#include <asm/irq.h> /* for struct irq_region */ 32#include <asm/parisc-device.h> 33 34struct system_cpuinfo_parisc boot_cpu_data __ro_after_init; 35EXPORT_SYMBOL(boot_cpu_data); 36#ifdef CONFIG_PA8X00 37int _parisc_requires_coherency __ro_after_init; 38EXPORT_SYMBOL(_parisc_requires_coherency); 39#endif 40 41DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data); 42 43/* 44** PARISC CPU driver - claim "device" and initialize CPU data structures. 45** 46** Consolidate per CPU initialization into (mostly) one module. 47** Monarch CPU will initialize boot_cpu_data which shouldn't 48** change once the system has booted. 49** 50** The callback *should* do per-instance initialization of 51** everything including the monarch. "Per CPU" init code in 52** setup.c:start_parisc() has migrated here and start_parisc() 53** will call register_parisc_driver(&cpu_driver) before calling do_inventory(). 54** 55** The goal of consolidating CPU initialization into one place is 56** to make sure all CPUs get initialized the same way. 57** The code path not shared is how PDC hands control of the CPU to the OS. 58** The initialization of OS data structures is the same (done below). 59*/ 60 61/** 62 * init_percpu_prof - enable/setup per cpu profiling hooks. 63 * @cpunum: The processor instance. 64 * 65 * FIXME: doesn't do much yet... 66 */ 67static void 68init_percpu_prof(unsigned long cpunum) 69{ 70} 71 72 73/** 74 * processor_probe - Determine if processor driver should claim this device. 75 * @dev: The device which has been found. 76 * 77 * Determine if processor driver should claim this chip (return 0) or not 78 * (return 1). If so, initialize the chip and tell other partners in crime 79 * they have work to do. 80 */ 81static int __init processor_probe(struct parisc_device *dev) 82{ 83 unsigned long txn_addr; 84 unsigned long cpuid; 85 struct cpuinfo_parisc *p; 86 struct pdc_pat_cpu_num cpu_info = { }; 87 88#ifdef CONFIG_SMP 89 if (num_online_cpus() >= nr_cpu_ids) { 90 printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n"); 91 return 1; 92 } 93#else 94 if (boot_cpu_data.cpu_count > 0) { 95 printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n"); 96 return 1; 97 } 98#endif 99 100 /* logical CPU ID and update global counter 101 * May get overwritten by PAT code. 102 */ 103 cpuid = boot_cpu_data.cpu_count; 104 txn_addr = dev->hpa.start; /* for legacy PDC */ 105 cpu_info.cpu_num = cpu_info.cpu_loc = cpuid; 106 107#ifdef CONFIG_64BIT 108 if (is_pdc_pat()) { 109 ulong status; 110 unsigned long bytecnt; 111 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; 112 113 pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL); 114 if (!pa_pdc_cell) 115 panic("couldn't allocate memory for PDC_PAT_CELL!"); 116 117 status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc, 118 dev->mod_index, PA_VIEW, pa_pdc_cell); 119 120 BUG_ON(PDC_OK != status); 121 122 /* verify it's the same as what do_pat_inventory() found */ 123 BUG_ON(dev->mod_info != pa_pdc_cell->mod_info); 124 BUG_ON(dev->pmod_loc != pa_pdc_cell->mod_location); 125 126 txn_addr = pa_pdc_cell->mod[0]; /* id_eid for IO sapic */ 127 128 kfree(pa_pdc_cell); 129 130 /* get the cpu number */ 131 status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start); 132 BUG_ON(PDC_OK != status); 133 134 pr_info("Logical CPU #%lu is physical cpu #%lu at location " 135 "0x%lx with hpa %pa\n", 136 cpuid, cpu_info.cpu_num, cpu_info.cpu_loc, 137 &dev->hpa.start); 138 139#undef USE_PAT_CPUID 140#ifdef USE_PAT_CPUID 141/* We need contiguous numbers for cpuid. Firmware's notion 142 * of cpuid is for physical CPUs and we just don't care yet. 143 * We'll care when we need to query PAT PDC about a CPU *after* 144 * boot time (ie shutdown a CPU from an OS perspective). 145 */ 146 if (cpu_info.cpu_num >= NR_CPUS) { 147 printk(KERN_WARNING "IGNORING CPU at %pa," 148 " cpu_slot_id > NR_CPUS" 149 " (%ld > %d)\n", 150 &dev->hpa.start, cpu_info.cpu_num, NR_CPUS); 151 /* Ignore CPU since it will only crash */ 152 boot_cpu_data.cpu_count--; 153 return 1; 154 } else { 155 cpuid = cpu_info.cpu_num; 156 } 157#endif 158 } 159#endif 160 161 p = &per_cpu(cpu_data, cpuid); 162 boot_cpu_data.cpu_count++; 163 164 /* initialize counters - CPU 0 gets it_value set in time_init() */ 165 if (cpuid) 166 memset(p, 0, sizeof(struct cpuinfo_parisc)); 167 168 p->dev = dev; /* Save IODC data in case we need it */ 169 p->hpa = dev->hpa.start; /* save CPU hpa */ 170 p->cpuid = cpuid; /* save CPU id */ 171 p->txn_addr = txn_addr; /* save CPU IRQ address */ 172 p->cpu_num = cpu_info.cpu_num; 173 p->cpu_loc = cpu_info.cpu_loc; 174 175 store_cpu_topology(cpuid); 176 177#ifdef CONFIG_SMP 178 /* 179 ** FIXME: review if any other initialization is clobbered 180 ** for boot_cpu by the above memset(). 181 */ 182 init_percpu_prof(cpuid); 183#endif 184 185 /* 186 ** CONFIG_SMP: init_smp_config() will attempt to get CPUs into 187 ** OS control. RENDEZVOUS is the default state - see mem_set above. 188 ** p->state = STATE_RENDEZVOUS; 189 */ 190 191#if 0 192 /* CPU 0 IRQ table is statically allocated/initialized */ 193 if (cpuid) { 194 struct irqaction actions[]; 195 196 /* 197 ** itimer and ipi IRQ handlers are statically initialized in 198 ** arch/parisc/kernel/irq.c. ie Don't need to register them. 199 */ 200 actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC); 201 if (!actions) { 202 /* not getting it's own table, share with monarch */ 203 actions = cpu_irq_actions[0]; 204 } 205 206 cpu_irq_actions[cpuid] = actions; 207 } 208#endif 209 210 /* 211 * Bring this CPU up now! (ignore bootstrap cpuid == 0) 212 */ 213#ifdef CONFIG_SMP 214 if (cpuid) { 215 set_cpu_present(cpuid, true); 216 add_cpu(cpuid); 217 } 218#endif 219 220 return 0; 221} 222 223/** 224 * collect_boot_cpu_data - Fill the boot_cpu_data structure. 225 * 226 * This function collects and stores the generic processor information 227 * in the boot_cpu_data structure. 228 */ 229void __init collect_boot_cpu_data(void) 230{ 231 unsigned long cr16_seed; 232 char orig_prod_num[64], current_prod_num[64], serial_no[64]; 233 234 memset(&boot_cpu_data, 0, sizeof(boot_cpu_data)); 235 236 cr16_seed = get_cycles(); 237 add_device_randomness(&cr16_seed, sizeof(cr16_seed)); 238 239 boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */ 240 241 /* get CPU-Model Information... */ 242#define p ((unsigned long *)&boot_cpu_data.pdc.model) 243 if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK) { 244 printk(KERN_INFO 245 "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", 246 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9]); 247 248 add_device_randomness(&boot_cpu_data.pdc.model, 249 sizeof(boot_cpu_data.pdc.model)); 250 } 251#undef p 252 253 if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK) { 254 printk(KERN_INFO "vers %08lx\n", 255 boot_cpu_data.pdc.versions); 256 257 add_device_randomness(&boot_cpu_data.pdc.versions, 258 sizeof(boot_cpu_data.pdc.versions)); 259 } 260 261 if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) { 262 printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n", 263 (boot_cpu_data.pdc.cpuid >> 5) & 127, 264 boot_cpu_data.pdc.cpuid & 31, 265 boot_cpu_data.pdc.cpuid); 266 267 add_device_randomness(&boot_cpu_data.pdc.cpuid, 268 sizeof(boot_cpu_data.pdc.cpuid)); 269 } 270 271 if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK) 272 printk(KERN_INFO "capabilities 0x%lx\n", 273 boot_cpu_data.pdc.capabilities); 274 275 if (pdc_model_sysmodel(OS_ID_HPUX, boot_cpu_data.pdc.sys_model_name) == PDC_OK) 276 pr_info("HP-UX model name: %s\n", 277 boot_cpu_data.pdc.sys_model_name); 278 279 serial_no[0] = 0; 280 if (pdc_model_sysmodel(OS_ID_MPEXL, serial_no) == PDC_OK && 281 serial_no[0]) 282 pr_info("MPE/iX model name: %s\n", serial_no); 283 284 dump_stack_set_arch_desc("%s", boot_cpu_data.pdc.sys_model_name); 285 286 boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion; 287 boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion; 288 289 boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion); 290 boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0]; 291 boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1]; 292 293#ifdef CONFIG_PA8X00 294 _parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) || 295 (boot_cpu_data.cpu_type == mako2); 296#endif 297 298 if (pdc_model_platform_info(orig_prod_num, current_prod_num, serial_no) == PDC_OK) { 299 printk(KERN_INFO "product %s, original product %s, S/N: %s\n", 300 current_prod_num[0] ? current_prod_num : "n/a", 301 orig_prod_num, serial_no); 302 add_device_randomness(orig_prod_num, strlen(orig_prod_num)); 303 add_device_randomness(current_prod_num, strlen(current_prod_num)); 304 add_device_randomness(serial_no, strlen(serial_no)); 305 } 306} 307 308 309/** 310 * init_per_cpu - Handle individual processor initializations. 311 * @cpunum: logical processor number. 312 * 313 * This function handles initialization for *every* CPU 314 * in the system: 315 * 316 * o Set "default" CPU width for trap handlers 317 * 318 * o Enable FP coprocessor 319 * REVISIT: this could be done in the "code 22" trap handler. 320 * (frowands idea - that way we know which processes need FP 321 * registers saved on the interrupt stack.) 322 * NEWS FLASH: wide kernels need FP coprocessor enabled to handle 323 * formatted printing of %lx for example (double divides I think) 324 * 325 * o Enable CPU profiling hooks. 326 */ 327int init_per_cpu(int cpunum) 328{ 329 int ret; 330 struct pdc_coproc_cfg coproc_cfg; 331 332 set_firmware_width(); 333 ret = pdc_coproc_cfg(&coproc_cfg); 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 btlb_init_per_cpu(); 371 372 return ret; 373} 374 375/* 376 * Display CPU info for all CPUs. 377 */ 378int 379show_cpuinfo (struct seq_file *m, void *v) 380{ 381 unsigned long cpu; 382 char cpu_name[60], *p; 383 384 /* strip PA path from CPU name to not confuse lscpu */ 385 strscpy(cpu_name, per_cpu(cpu_data, 0).dev->name, sizeof(cpu_name)); 386 p = strrchr(cpu_name, '['); 387 if (p) 388 *(--p) = 0; 389 390 for_each_online_cpu(cpu) { 391#ifdef CONFIG_SMP 392 const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu); 393 394 if (0 == cpuinfo->hpa) 395 continue; 396#endif 397 seq_printf(m, "processor\t: %lu\n" 398 "cpu family\t: PA-RISC %s\n", 399 cpu, boot_cpu_data.family_name); 400 401 seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name ); 402 403 /* cpu MHz */ 404 seq_printf(m, "cpu MHz\t\t: %d.%06d\n", 405 boot_cpu_data.cpu_hz / 1000000, 406 boot_cpu_data.cpu_hz % 1000000 ); 407 408#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY 409 seq_printf(m, "physical id\t: %d\n", 410 topology_physical_package_id(cpu)); 411 seq_printf(m, "siblings\t: %d\n", 412 cpumask_weight(topology_core_cpumask(cpu))); 413 seq_printf(m, "core id\t\t: %d\n", topology_core_id(cpu)); 414#endif 415 416 seq_printf(m, "capabilities\t:"); 417 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32) 418 seq_puts(m, " os32"); 419 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64) 420 seq_puts(m, " os64"); 421 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC) 422 seq_puts(m, " iopdir_fdc"); 423 switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) { 424 case PDC_MODEL_NVA_SUPPORTED: 425 seq_puts(m, " nva_supported"); 426 break; 427 case PDC_MODEL_NVA_SLOW: 428 seq_puts(m, " nva_slow"); 429 break; 430 case PDC_MODEL_NVA_UNSUPPORTED: 431 seq_puts(m, " needs_equivalent_aliasing"); 432 break; 433 } 434 seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities); 435 436 seq_printf(m, "model\t\t: %s - %s\n", 437 boot_cpu_data.pdc.sys_model_name, 438 cpu_name); 439 440 seq_printf(m, "hversion\t: 0x%08x\n" 441 "sversion\t: 0x%08x\n", 442 boot_cpu_data.hversion, 443 boot_cpu_data.sversion ); 444 445 /* print cachesize info */ 446 show_cache_info(m); 447 448 seq_printf(m, "bogomips\t: %lu.%02lu\n", 449 loops_per_jiffy / (500000 / HZ), 450 loops_per_jiffy / (5000 / HZ) % 100); 451 452 seq_printf(m, "software id\t: %ld\n\n", 453 boot_cpu_data.pdc.model.sw_id); 454 } 455 return 0; 456} 457 458static const struct parisc_device_id processor_tbl[] __initconst = { 459 { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID }, 460 { 0, } 461}; 462 463static struct parisc_driver cpu_driver __refdata = { 464 .name = "CPU", 465 .id_table = processor_tbl, 466 .probe = processor_probe 467}; 468 469/** 470 * processor_init - Processor initialization procedure. 471 * 472 * Register this driver. 473 */ 474void __init processor_init(void) 475{ 476 reset_cpu_topology(); 477 register_parisc_driver(&cpu_driver); 478} 479