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/slab.h>
34 #include <linux/cpu.h>
35 #include <asm/param.h>
36 #include <asm/cache.h>
37 #include <asm/hardware.h> /* for register_parisc_driver() stuff */
38 #include <asm/processor.h>
41 #include <asm/pdcpat.h>
42 #include <asm/irq.h> /* for struct irq_region */
43 #include <asm/parisc-device.h>
45 struct system_cpuinfo_parisc boot_cpu_data __read_mostly;
46 EXPORT_SYMBOL(boot_cpu_data);
48 DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data);
50 extern int update_cr16_clocksource(void); /* from time.c */
53 ** PARISC CPU driver - claim "device" and initialize CPU data structures.
55 ** Consolidate per CPU initialization into (mostly) one module.
56 ** Monarch CPU will initialize boot_cpu_data which shouldn't
57 ** change once the system has booted.
59 ** The callback *should* do per-instance initialization of
60 ** everything including the monarch. "Per CPU" init code in
61 ** setup.c:start_parisc() has migrated here and start_parisc()
62 ** will call register_parisc_driver(&cpu_driver) before calling do_inventory().
64 ** The goal of consolidating CPU initialization into one place is
65 ** to make sure all CPUs get initialized the same way.
66 ** The code path not shared is how PDC hands control of the CPU to the OS.
67 ** The initialization of OS data structures is the same (done below).
71 * init_cpu_profiler - enable/setup per cpu profiling hooks.
72 * @cpunum: The processor instance.
74 * FIXME: doesn't do much yet...
77 init_percpu_prof(unsigned long cpunum)
79 struct cpuinfo_parisc *p;
81 p = &per_cpu(cpu_data, cpunum);
83 p->prof_multiplier = 1;
88 * processor_probe - Determine if processor driver should claim this device.
89 * @dev: The device which has been found.
91 * Determine if processor driver should claim this chip (return 0) or not
92 * (return 1). If so, initialize the chip and tell other partners in crime
93 * they have work to do.
95 static int __cpuinit processor_probe(struct parisc_device *dev)
97 unsigned long txn_addr;
99 struct cpuinfo_parisc *p;
102 if (num_online_cpus() >= nr_cpu_ids) {
103 printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n");
107 if (boot_cpu_data.cpu_count > 0) {
108 printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n");
113 /* logical CPU ID and update global counter
114 * May get overwritten by PAT code.
116 cpuid = boot_cpu_data.cpu_count;
117 txn_addr = dev->hpa.start; /* for legacy PDC */
122 unsigned long bytecnt;
123 pdc_pat_cell_mod_maddr_block_t pa_pdc_cell;
126 struct pdc_pat_cpu_num cpu_info;
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 */
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).
146 /* get the cpu number */
147 status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);
149 BUG_ON(PDC_OK != status);
151 if (cpu_info.cpu_num >= NR_CPUS) {
152 printk(KERN_WARNING "IGNORING CPU at 0x%x,"
153 " cpu_slot_id > NR_CPUS"
155 dev->hpa.start, cpu_info.cpu_num, NR_CPUS);
156 /* Ignore CPU since it will only crash */
157 boot_cpu_data.cpu_count--;
160 cpuid = cpu_info.cpu_num;
166 p = &per_cpu(cpu_data, cpuid);
167 boot_cpu_data.cpu_count++;
169 /* initialize counters - CPU 0 gets it_value set in time_init() */
171 memset(p, 0, sizeof(struct cpuinfo_parisc));
173 p->loops_per_jiffy = loops_per_jiffy;
174 p->dev = dev; /* Save IODC data in case we need it */
175 p->hpa = dev->hpa.start; /* save CPU hpa */
176 p->cpuid = cpuid; /* save CPU id */
177 p->txn_addr = txn_addr; /* save CPU IRQ address */
180 ** FIXME: review if any other initialization is clobbered
181 ** for boot_cpu by the above memset().
183 init_percpu_prof(cpuid);
187 ** CONFIG_SMP: init_smp_config() will attempt to get CPUs into
188 ** OS control. RENDEZVOUS is the default state - see mem_set above.
189 ** p->state = STATE_RENDEZVOUS;
193 /* CPU 0 IRQ table is statically allocated/initialized */
195 struct irqaction actions[];
198 ** itimer and ipi IRQ handlers are statically initialized in
199 ** arch/parisc/kernel/irq.c. ie Don't need to register them.
201 actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC);
203 /* not getting it's own table, share with monarch */
204 actions = cpu_irq_actions[0];
207 cpu_irq_actions[cpuid] = actions;
212 * Bring this CPU up now! (ignore bootstrap cpuid == 0)
216 set_cpu_present(cpuid, true);
221 /* If we've registered more than one cpu,
222 * we'll use the jiffies clocksource since cr16
223 * is not synchronized between CPUs.
225 update_cr16_clocksource();
231 * collect_boot_cpu_data - Fill the boot_cpu_data structure.
233 * This function collects and stores the generic processor information
234 * in the boot_cpu_data structure.
236 void __init collect_boot_cpu_data(void)
238 memset(&boot_cpu_data, 0, sizeof(boot_cpu_data));
240 boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */
242 /* get CPU-Model Information... */
243 #define p ((unsigned long *)&boot_cpu_data.pdc.model)
244 if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK)
246 "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
247 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]);
250 if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK)
251 printk(KERN_INFO "vers %08lx\n",
252 boot_cpu_data.pdc.versions);
254 if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK)
255 printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n",
256 (boot_cpu_data.pdc.cpuid >> 5) & 127,
257 boot_cpu_data.pdc.cpuid & 31,
258 boot_cpu_data.pdc.cpuid);
260 if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK)
261 printk(KERN_INFO "capabilities 0x%lx\n",
262 boot_cpu_data.pdc.capabilities);
264 if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK)
265 printk(KERN_INFO "model %s\n",
266 boot_cpu_data.pdc.sys_model_name);
268 boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
269 boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
271 boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion);
272 boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0];
273 boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1];
279 * init_per_cpu - Handle individual processor initializations.
280 * @cpunum: logical processor number.
282 * This function handles initialization for *every* CPU
285 * o Set "default" CPU width for trap handlers
287 * o Enable FP coprocessor
288 * REVISIT: this could be done in the "code 22" trap handler.
289 * (frowands idea - that way we know which processes need FP
290 * registers saved on the interrupt stack.)
291 * NEWS FLASH: wide kernels need FP coprocessor enabled to handle
292 * formatted printing of %lx for example (double divides I think)
294 * o Enable CPU profiling hooks.
296 int __cpuinit init_per_cpu(int cpunum)
299 struct pdc_coproc_cfg coproc_cfg;
301 set_firmware_width();
302 ret = pdc_coproc_cfg(&coproc_cfg);
304 if(ret >= 0 && coproc_cfg.ccr_functional) {
305 mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */
307 /* FWIW, FP rev/model is a more accurate way to determine
308 ** CPU type. CPU rev/model has some ambiguous cases.
310 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
311 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
313 printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n",
314 cpunum, coproc_cfg.revision, coproc_cfg.model);
317 ** store status register to stack (hopefully aligned)
318 ** and clear the T-bit.
320 asm volatile ("fstd %fr0,8(%sp)");
323 printk(KERN_WARNING "WARNING: No FP CoProcessor?!"
324 " (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n"
326 "Halting Machine - FP required\n"
328 , coproc_cfg.ccr_functional);
330 mdelay(100); /* previous chars get pushed to console */
331 panic("FP CoProc not reported");
335 /* FUTURE: Enable Performance Monitor : ccr bit 0x20 */
336 init_percpu_prof(cpunum);
342 * Display CPU info for all CPUs.
345 show_cpuinfo (struct seq_file *m, void *v)
349 for_each_online_cpu(cpu) {
350 const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
352 if (0 == cpuinfo->hpa)
355 seq_printf(m, "processor\t: %lu\n"
356 "cpu family\t: PA-RISC %s\n",
357 cpu, boot_cpu_data.family_name);
359 seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name );
362 seq_printf(m, "cpu MHz\t\t: %d.%06d\n",
363 boot_cpu_data.cpu_hz / 1000000,
364 boot_cpu_data.cpu_hz % 1000000 );
366 seq_printf(m, "capabilities\t:");
367 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)
368 seq_printf(m, " os32");
369 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)
370 seq_printf(m, " os64");
373 seq_printf(m, "model\t\t: %s\n"
374 "model name\t: %s\n",
375 boot_cpu_data.pdc.sys_model_name,
377 cpuinfo->dev->name : "Unknown");
379 seq_printf(m, "hversion\t: 0x%08x\n"
380 "sversion\t: 0x%08x\n",
381 boot_cpu_data.hversion,
382 boot_cpu_data.sversion );
384 /* print cachesize info */
387 seq_printf(m, "bogomips\t: %lu.%02lu\n",
388 cpuinfo->loops_per_jiffy / (500000 / HZ),
389 (cpuinfo->loops_per_jiffy / (5000 / HZ)) % 100);
391 seq_printf(m, "software id\t: %ld\n\n",
392 boot_cpu_data.pdc.model.sw_id);
397 static const struct parisc_device_id processor_tbl[] = {
398 { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID },
402 static struct parisc_driver cpu_driver = {
404 .id_table = processor_tbl,
405 .probe = processor_probe
409 * processor_init - Processor initialization procedure.
411 * Register this driver.
413 void __init processor_init(void)
415 register_parisc_driver(&cpu_driver);