2 * Initial setup-routines for HP 9000 based hardware.
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>
11 * Initial PA-RISC Version: 04-23-1999 by Helge Deller
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)
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.
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.
28 #include <linux/delay.h>
29 #include <linux/init.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>
42 #include <asm/pdcpat.h>
43 #include <asm/irq.h> /* for struct irq_region */
44 #include <asm/parisc-device.h>
46 struct system_cpuinfo_parisc boot_cpu_data __read_mostly;
47 EXPORT_SYMBOL(boot_cpu_data);
49 int _parisc_requires_coherency __read_mostly;
50 EXPORT_SYMBOL(_parisc_requires_coherency);
53 DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data);
56 ** PARISC CPU driver - claim "device" and initialize CPU data structures.
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.
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().
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).
74 * init_cpu_profiler - enable/setup per cpu profiling hooks.
75 * @cpunum: The processor instance.
77 * FIXME: doesn't do much yet...
80 init_percpu_prof(unsigned long cpunum)
86 * processor_probe - Determine if processor driver should claim this device.
87 * @dev: The device which has been found.
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.
93 static int __init processor_probe(struct parisc_device *dev)
95 unsigned long txn_addr;
97 struct cpuinfo_parisc *p;
98 struct pdc_pat_cpu_num cpu_info = { };
101 if (num_online_cpus() >= nr_cpu_ids) {
102 printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n");
106 if (boot_cpu_data.cpu_count > 0) {
107 printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n");
112 /* logical CPU ID and update global counter
113 * May get overwritten by PAT code.
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;
122 unsigned long bytecnt;
123 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
125 pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);
127 panic("couldn't allocate memory for PDC_PAT_CELL!");
129 status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,
130 dev->mod_index, PA_VIEW, pa_pdc_cell);
132 BUG_ON(PDC_OK != status);
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);
138 txn_addr = pa_pdc_cell->mod[0]; /* id_eid for IO sapic */
142 /* get the cpu number */
143 status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);
144 BUG_ON(PDC_OK != status);
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,
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).
158 if (cpu_info.cpu_num >= NR_CPUS) {
159 printk(KERN_WARNING "IGNORING CPU at %pa,"
160 " cpu_slot_id > NR_CPUS"
162 &dev->hpa.start, cpu_info.cpu_num, NR_CPUS);
163 /* Ignore CPU since it will only crash */
164 boot_cpu_data.cpu_count--;
167 cpuid = cpu_info.cpu_num;
173 p = &per_cpu(cpu_data, cpuid);
174 boot_cpu_data.cpu_count++;
176 /* initialize counters - CPU 0 gets it_value set in time_init() */
178 memset(p, 0, sizeof(struct cpuinfo_parisc));
180 p->dev = dev; /* Save IODC data in case we need it */
181 p->hpa = dev->hpa.start; /* save CPU hpa */
182 p->cpuid = cpuid; /* save CPU id */
183 p->txn_addr = txn_addr; /* save CPU IRQ address */
184 p->cpu_num = cpu_info.cpu_num;
185 p->cpu_loc = cpu_info.cpu_loc;
188 ** FIXME: review if any other initialization is clobbered
189 ** for boot_cpu by the above memset().
191 init_percpu_prof(cpuid);
195 ** CONFIG_SMP: init_smp_config() will attempt to get CPUs into
196 ** OS control. RENDEZVOUS is the default state - see mem_set above.
197 ** p->state = STATE_RENDEZVOUS;
201 /* CPU 0 IRQ table is statically allocated/initialized */
203 struct irqaction actions[];
206 ** itimer and ipi IRQ handlers are statically initialized in
207 ** arch/parisc/kernel/irq.c. ie Don't need to register them.
209 actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC);
211 /* not getting it's own table, share with monarch */
212 actions = cpu_irq_actions[0];
215 cpu_irq_actions[cpuid] = actions;
220 * Bring this CPU up now! (ignore bootstrap cpuid == 0)
224 set_cpu_present(cpuid, true);
233 * collect_boot_cpu_data - Fill the boot_cpu_data structure.
235 * This function collects and stores the generic processor information
236 * in the boot_cpu_data structure.
238 void __init collect_boot_cpu_data(void)
240 unsigned long cr16_seed;
242 memset(&boot_cpu_data, 0, sizeof(boot_cpu_data));
244 cr16_seed = get_cycles();
245 add_device_randomness(&cr16_seed, sizeof(cr16_seed));
247 boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */
249 /* get CPU-Model Information... */
250 #define p ((unsigned long *)&boot_cpu_data.pdc.model)
251 if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK) {
253 "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
254 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]);
256 add_device_randomness(&boot_cpu_data.pdc.model,
257 sizeof(boot_cpu_data.pdc.model));
261 if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK) {
262 printk(KERN_INFO "vers %08lx\n",
263 boot_cpu_data.pdc.versions);
265 add_device_randomness(&boot_cpu_data.pdc.versions,
266 sizeof(boot_cpu_data.pdc.versions));
269 if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) {
270 printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n",
271 (boot_cpu_data.pdc.cpuid >> 5) & 127,
272 boot_cpu_data.pdc.cpuid & 31,
273 boot_cpu_data.pdc.cpuid);
275 add_device_randomness(&boot_cpu_data.pdc.cpuid,
276 sizeof(boot_cpu_data.pdc.cpuid));
279 if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK)
280 printk(KERN_INFO "capabilities 0x%lx\n",
281 boot_cpu_data.pdc.capabilities);
283 if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK)
284 printk(KERN_INFO "model %s\n",
285 boot_cpu_data.pdc.sys_model_name);
287 boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
288 boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
290 boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion);
291 boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0];
292 boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1];
295 _parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) ||
296 (boot_cpu_data.cpu_type == mako2);
302 * init_per_cpu - Handle individual processor initializations.
303 * @cpunum: logical processor number.
305 * This function handles initialization for *every* CPU
308 * o Set "default" CPU width for trap handlers
310 * o Enable FP coprocessor
311 * REVISIT: this could be done in the "code 22" trap handler.
312 * (frowands idea - that way we know which processes need FP
313 * registers saved on the interrupt stack.)
314 * NEWS FLASH: wide kernels need FP coprocessor enabled to handle
315 * formatted printing of %lx for example (double divides I think)
317 * o Enable CPU profiling hooks.
319 int __init init_per_cpu(int cpunum)
322 struct pdc_coproc_cfg coproc_cfg;
324 set_firmware_width();
325 ret = pdc_coproc_cfg(&coproc_cfg);
327 if(ret >= 0 && coproc_cfg.ccr_functional) {
328 mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */
330 /* FWIW, FP rev/model is a more accurate way to determine
331 ** CPU type. CPU rev/model has some ambiguous cases.
333 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
334 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
337 printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n",
338 cpunum, coproc_cfg.revision, coproc_cfg.model);
341 ** store status register to stack (hopefully aligned)
342 ** and clear the T-bit.
344 asm volatile ("fstd %fr0,8(%sp)");
347 printk(KERN_WARNING "WARNING: No FP CoProcessor?!"
348 " (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n"
350 "Halting Machine - FP required\n"
352 , coproc_cfg.ccr_functional);
354 mdelay(100); /* previous chars get pushed to console */
355 panic("FP CoProc not reported");
359 /* FUTURE: Enable Performance Monitor : ccr bit 0x20 */
360 init_percpu_prof(cpunum);
366 * Display CPU info for all CPUs.
369 show_cpuinfo (struct seq_file *m, void *v)
372 char cpu_name[60], *p;
374 /* strip PA path from CPU name to not confuse lscpu */
375 strlcpy(cpu_name, per_cpu(cpu_data, 0).dev->name, sizeof(cpu_name));
376 p = strrchr(cpu_name, '[');
380 for_each_online_cpu(cpu) {
382 const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
384 if (0 == cpuinfo->hpa)
387 seq_printf(m, "processor\t: %lu\n"
388 "cpu family\t: PA-RISC %s\n",
389 cpu, boot_cpu_data.family_name);
391 seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name );
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 );
398 seq_printf(m, "capabilities\t:");
399 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)
400 seq_puts(m, " os32");
401 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)
402 seq_puts(m, " os64");
403 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC)
404 seq_puts(m, " iopdir_fdc");
405 switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) {
406 case PDC_MODEL_NVA_SUPPORTED:
407 seq_puts(m, " nva_supported");
409 case PDC_MODEL_NVA_SLOW:
410 seq_puts(m, " nva_slow");
412 case PDC_MODEL_NVA_UNSUPPORTED:
413 seq_puts(m, " needs_equivalent_aliasing");
416 seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities);
418 seq_printf(m, "model\t\t: %s - %s\n",
419 boot_cpu_data.pdc.sys_model_name,
422 seq_printf(m, "hversion\t: 0x%08x\n"
423 "sversion\t: 0x%08x\n",
424 boot_cpu_data.hversion,
425 boot_cpu_data.sversion );
427 /* print cachesize info */
430 seq_printf(m, "bogomips\t: %lu.%02lu\n",
431 loops_per_jiffy / (500000 / HZ),
432 loops_per_jiffy / (5000 / HZ) % 100);
434 seq_printf(m, "software id\t: %ld\n\n",
435 boot_cpu_data.pdc.model.sw_id);
440 static const struct parisc_device_id processor_tbl[] __initconst = {
441 { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID },
445 static struct parisc_driver cpu_driver __refdata = {
447 .id_table = processor_tbl,
448 .probe = processor_probe
452 * processor_init - Processor initialization procedure.
454 * Register this driver.
456 void __init processor_init(void)
458 register_parisc_driver(&cpu_driver);