1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Initial setup-routines for HP 9000 based hardware.
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>
12 * Initial PA-RISC Version: 04-23-1999 by Helge Deller
14 #include <linux/delay.h>
15 #include <linux/init.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>
29 #include <asm/pdcpat.h>
30 #include <asm/irq.h> /* for struct irq_region */
31 #include <asm/parisc-device.h>
33 struct system_cpuinfo_parisc boot_cpu_data __ro_after_init;
34 EXPORT_SYMBOL(boot_cpu_data);
36 int _parisc_requires_coherency __ro_after_init;
37 EXPORT_SYMBOL(_parisc_requires_coherency);
40 DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data);
43 ** PARISC CPU driver - claim "device" and initialize CPU data structures.
45 ** Consolidate per CPU initialization into (mostly) one module.
46 ** Monarch CPU will initialize boot_cpu_data which shouldn't
47 ** change once the system has booted.
49 ** The callback *should* do per-instance initialization of
50 ** everything including the monarch. "Per CPU" init code in
51 ** setup.c:start_parisc() has migrated here and start_parisc()
52 ** will call register_parisc_driver(&cpu_driver) before calling do_inventory().
54 ** The goal of consolidating CPU initialization into one place is
55 ** to make sure all CPUs get initialized the same way.
56 ** The code path not shared is how PDC hands control of the CPU to the OS.
57 ** The initialization of OS data structures is the same (done below).
61 * init_cpu_profiler - enable/setup per cpu profiling hooks.
62 * @cpunum: The processor instance.
64 * FIXME: doesn't do much yet...
67 init_percpu_prof(unsigned long cpunum)
73 * processor_probe - Determine if processor driver should claim this device.
74 * @dev: The device which has been found.
76 * Determine if processor driver should claim this chip (return 0) or not
77 * (return 1). If so, initialize the chip and tell other partners in crime
78 * they have work to do.
80 static int __init processor_probe(struct parisc_device *dev)
82 unsigned long txn_addr;
84 struct cpuinfo_parisc *p;
85 struct pdc_pat_cpu_num cpu_info = { };
88 if (num_online_cpus() >= nr_cpu_ids) {
89 printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n");
93 if (boot_cpu_data.cpu_count > 0) {
94 printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n");
99 /* logical CPU ID and update global counter
100 * May get overwritten by PAT code.
102 cpuid = boot_cpu_data.cpu_count;
103 txn_addr = dev->hpa.start; /* for legacy PDC */
104 cpu_info.cpu_num = cpu_info.cpu_loc = cpuid;
109 unsigned long bytecnt;
110 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
112 pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);
114 panic("couldn't allocate memory for PDC_PAT_CELL!");
116 status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,
117 dev->mod_index, PA_VIEW, pa_pdc_cell);
119 BUG_ON(PDC_OK != status);
121 /* verify it's the same as what do_pat_inventory() found */
122 BUG_ON(dev->mod_info != pa_pdc_cell->mod_info);
123 BUG_ON(dev->pmod_loc != pa_pdc_cell->mod_location);
125 txn_addr = pa_pdc_cell->mod[0]; /* id_eid for IO sapic */
129 /* get the cpu number */
130 status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);
131 BUG_ON(PDC_OK != status);
133 pr_info("Logical CPU #%lu is physical cpu #%lu at location "
134 "0x%lx with hpa %pa\n",
135 cpuid, cpu_info.cpu_num, cpu_info.cpu_loc,
140 /* We need contiguous numbers for cpuid. Firmware's notion
141 * of cpuid is for physical CPUs and we just don't care yet.
142 * We'll care when we need to query PAT PDC about a CPU *after*
143 * boot time (ie shutdown a CPU from an OS perspective).
145 if (cpu_info.cpu_num >= NR_CPUS) {
146 printk(KERN_WARNING "IGNORING CPU at %pa,"
147 " cpu_slot_id > NR_CPUS"
149 &dev->hpa.start, cpu_info.cpu_num, NR_CPUS);
150 /* Ignore CPU since it will only crash */
151 boot_cpu_data.cpu_count--;
154 cpuid = cpu_info.cpu_num;
160 p = &per_cpu(cpu_data, cpuid);
161 boot_cpu_data.cpu_count++;
163 /* initialize counters - CPU 0 gets it_value set in time_init() */
165 memset(p, 0, sizeof(struct cpuinfo_parisc));
167 p->dev = dev; /* Save IODC data in case we need it */
168 p->hpa = dev->hpa.start; /* save CPU hpa */
169 p->cpuid = cpuid; /* save CPU id */
170 p->txn_addr = txn_addr; /* save CPU IRQ address */
171 p->cpu_num = cpu_info.cpu_num;
172 p->cpu_loc = cpu_info.cpu_loc;
174 store_cpu_topology(cpuid);
178 ** FIXME: review if any other initialization is clobbered
179 ** for boot_cpu by the above memset().
181 init_percpu_prof(cpuid);
185 ** CONFIG_SMP: init_smp_config() will attempt to get CPUs into
186 ** OS control. RENDEZVOUS is the default state - see mem_set above.
187 ** p->state = STATE_RENDEZVOUS;
191 /* CPU 0 IRQ table is statically allocated/initialized */
193 struct irqaction actions[];
196 ** itimer and ipi IRQ handlers are statically initialized in
197 ** arch/parisc/kernel/irq.c. ie Don't need to register them.
199 actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC);
201 /* not getting it's own table, share with monarch */
202 actions = cpu_irq_actions[0];
205 cpu_irq_actions[cpuid] = actions;
210 * Bring this CPU up now! (ignore bootstrap cpuid == 0)
214 set_cpu_present(cpuid, true);
223 * collect_boot_cpu_data - Fill the boot_cpu_data structure.
225 * This function collects and stores the generic processor information
226 * in the boot_cpu_data structure.
228 void __init collect_boot_cpu_data(void)
230 unsigned long cr16_seed;
231 char orig_prod_num[64], current_prod_num[64], serial_no[64];
233 memset(&boot_cpu_data, 0, sizeof(boot_cpu_data));
235 cr16_seed = get_cycles();
236 add_device_randomness(&cr16_seed, sizeof(cr16_seed));
238 boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */
240 /* get CPU-Model Information... */
241 #define p ((unsigned long *)&boot_cpu_data.pdc.model)
242 if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK) {
244 "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
245 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]);
247 add_device_randomness(&boot_cpu_data.pdc.model,
248 sizeof(boot_cpu_data.pdc.model));
252 if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK) {
253 printk(KERN_INFO "vers %08lx\n",
254 boot_cpu_data.pdc.versions);
256 add_device_randomness(&boot_cpu_data.pdc.versions,
257 sizeof(boot_cpu_data.pdc.versions));
260 if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) {
261 printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n",
262 (boot_cpu_data.pdc.cpuid >> 5) & 127,
263 boot_cpu_data.pdc.cpuid & 31,
264 boot_cpu_data.pdc.cpuid);
266 add_device_randomness(&boot_cpu_data.pdc.cpuid,
267 sizeof(boot_cpu_data.pdc.cpuid));
270 if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK)
271 printk(KERN_INFO "capabilities 0x%lx\n",
272 boot_cpu_data.pdc.capabilities);
274 if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK)
275 printk(KERN_INFO "model %s\n",
276 boot_cpu_data.pdc.sys_model_name);
278 dump_stack_set_arch_desc("%s", boot_cpu_data.pdc.sys_model_name);
280 boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
281 boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
283 boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion);
284 boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0];
285 boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1];
288 _parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) ||
289 (boot_cpu_data.cpu_type == mako2);
292 if (pdc_model_platform_info(orig_prod_num, current_prod_num, serial_no) == PDC_OK) {
293 printk(KERN_INFO "product %s, original product %s, S/N: %s\n",
294 current_prod_num[0] ? current_prod_num : "n/a",
295 orig_prod_num, serial_no);
296 add_device_randomness(orig_prod_num, strlen(orig_prod_num));
297 add_device_randomness(current_prod_num, strlen(current_prod_num));
298 add_device_randomness(serial_no, strlen(serial_no));
304 * init_per_cpu - Handle individual processor initializations.
305 * @cpunum: logical processor number.
307 * This function handles initialization for *every* CPU
310 * o Set "default" CPU width for trap handlers
312 * o Enable FP coprocessor
313 * REVISIT: this could be done in the "code 22" trap handler.
314 * (frowands idea - that way we know which processes need FP
315 * registers saved on the interrupt stack.)
316 * NEWS FLASH: wide kernels need FP coprocessor enabled to handle
317 * formatted printing of %lx for example (double divides I think)
319 * o Enable CPU profiling hooks.
321 int init_per_cpu(int cpunum)
324 struct pdc_coproc_cfg coproc_cfg;
326 set_firmware_width();
327 ret = pdc_coproc_cfg(&coproc_cfg);
329 if(ret >= 0 && coproc_cfg.ccr_functional) {
330 mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */
332 /* FWIW, FP rev/model is a more accurate way to determine
333 ** CPU type. CPU rev/model has some ambiguous cases.
335 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
336 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
339 printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n",
340 cpunum, coproc_cfg.revision, coproc_cfg.model);
343 ** store status register to stack (hopefully aligned)
344 ** and clear the T-bit.
346 asm volatile ("fstd %fr0,8(%sp)");
349 printk(KERN_WARNING "WARNING: No FP CoProcessor?!"
350 " (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n"
352 "Halting Machine - FP required\n"
354 , coproc_cfg.ccr_functional);
356 mdelay(100); /* previous chars get pushed to console */
357 panic("FP CoProc not reported");
361 /* FUTURE: Enable Performance Monitor : ccr bit 0x20 */
362 init_percpu_prof(cpunum);
368 * Display CPU info for all CPUs.
371 show_cpuinfo (struct seq_file *m, void *v)
374 char cpu_name[60], *p;
376 /* strip PA path from CPU name to not confuse lscpu */
377 strlcpy(cpu_name, per_cpu(cpu_data, 0).dev->name, sizeof(cpu_name));
378 p = strrchr(cpu_name, '[');
382 for_each_online_cpu(cpu) {
384 const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
386 if (0 == cpuinfo->hpa)
389 seq_printf(m, "processor\t: %lu\n"
390 "cpu family\t: PA-RISC %s\n",
391 cpu, boot_cpu_data.family_name);
393 seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name );
396 seq_printf(m, "cpu MHz\t\t: %d.%06d\n",
397 boot_cpu_data.cpu_hz / 1000000,
398 boot_cpu_data.cpu_hz % 1000000 );
400 #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
401 seq_printf(m, "physical id\t: %d\n",
402 topology_physical_package_id(cpu));
403 seq_printf(m, "siblings\t: %d\n",
404 cpumask_weight(topology_core_cpumask(cpu)));
405 seq_printf(m, "core id\t\t: %d\n", topology_core_id(cpu));
408 seq_printf(m, "capabilities\t:");
409 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)
410 seq_puts(m, " os32");
411 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)
412 seq_puts(m, " os64");
413 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC)
414 seq_puts(m, " iopdir_fdc");
415 switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) {
416 case PDC_MODEL_NVA_SUPPORTED:
417 seq_puts(m, " nva_supported");
419 case PDC_MODEL_NVA_SLOW:
420 seq_puts(m, " nva_slow");
422 case PDC_MODEL_NVA_UNSUPPORTED:
423 seq_puts(m, " needs_equivalent_aliasing");
426 seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities);
428 seq_printf(m, "model\t\t: %s - %s\n",
429 boot_cpu_data.pdc.sys_model_name,
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 );
437 /* print cachesize info */
440 seq_printf(m, "bogomips\t: %lu.%02lu\n",
441 loops_per_jiffy / (500000 / HZ),
442 loops_per_jiffy / (5000 / HZ) % 100);
444 seq_printf(m, "software id\t: %ld\n\n",
445 boot_cpu_data.pdc.model.sw_id);
450 static const struct parisc_device_id processor_tbl[] __initconst = {
451 { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID },
455 static struct parisc_driver cpu_driver __refdata = {
457 .id_table = processor_tbl,
458 .probe = processor_probe
462 * processor_init - Processor initialization procedure.
464 * Register this driver.
466 void __init processor_init(void)
468 reset_cpu_topology();
469 register_parisc_driver(&cpu_driver);