1 /* $Id: processor.c,v 1.1 2002/07/20 16:27:06 rhirst Exp $
3 * Initial setup-routines for HP 9000 based hardware.
5 * Copyright (C) 1991, 1992, 1995 Linus Torvalds
6 * Modifications for PA-RISC (C) 1999 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 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <linux/delay.h>
30 #include <linux/init.h>
32 #include <linux/module.h>
33 #include <linux/seq_file.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 struct cpuinfo_parisc cpu_data[NR_CPUS] __read_mostly;
51 extern int update_cr16_clocksource(void); /* from time.c */
54 ** PARISC CPU driver - claim "device" and initialize CPU data structures.
56 ** Consolidate per CPU initialization into (mostly) one module.
57 ** Monarch CPU will initialize boot_cpu_data which shouldn't
58 ** change once the system has booted.
60 ** The callback *should* do per-instance initialization of
61 ** everything including the monarch. "Per CPU" init code in
62 ** setup.c:start_parisc() has migrated here and start_parisc()
63 ** will call register_parisc_driver(&cpu_driver) before calling do_inventory().
65 ** The goal of consolidating CPU initialization into one place is
66 ** to make sure all CPU's get initialized the same way.
67 ** The code path not shared is how PDC hands control of the CPU to the OS.
68 ** The initialization of OS data structures is the same (done below).
72 * processor_probe - Determine if processor driver should claim this device.
73 * @dev: The device which has been found.
75 * Determine if processor driver should claim this chip (return 0) or not
76 * (return 1). If so, initialize the chip and tell other partners in crime
77 * they have work to do.
79 static int __init processor_probe(struct parisc_device *dev)
81 unsigned long txn_addr;
83 struct cpuinfo_parisc *p;
86 if (boot_cpu_data.cpu_count > 0) {
87 printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n");
92 /* logical CPU ID and update global counter
93 * May get overwritten by PAT code.
95 cpuid = boot_cpu_data.cpu_count;
96 txn_addr = dev->hpa.start; /* for legacy PDC */
101 unsigned long bytecnt;
102 pdc_pat_cell_mod_maddr_block_t pa_pdc_cell;
105 struct pdc_pat_cpu_num cpu_info;
108 status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,
109 dev->mod_index, PA_VIEW, &pa_pdc_cell);
111 BUG_ON(PDC_OK != status);
113 /* verify it's the same as what do_pat_inventory() found */
114 BUG_ON(dev->mod_info != pa_pdc_cell.mod_info);
115 BUG_ON(dev->pmod_loc != pa_pdc_cell.mod_location);
117 txn_addr = pa_pdc_cell.mod[0]; /* id_eid for IO sapic */
120 /* We need contiguous numbers for cpuid. Firmware's notion
121 * of cpuid is for physical CPUs and we just don't care yet.
122 * We'll care when we need to query PAT PDC about a CPU *after*
123 * boot time (ie shutdown a CPU from an OS perspective).
125 /* get the cpu number */
126 status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);
128 BUG_ON(PDC_OK != status);
130 if (cpu_info.cpu_num >= NR_CPUS) {
131 printk(KERN_WARNING "IGNORING CPU at 0x%x,"
132 " cpu_slot_id > NR_CPUS"
134 dev->hpa.start, cpu_info.cpu_num, NR_CPUS);
135 /* Ignore CPU since it will only crash */
136 boot_cpu_data.cpu_count--;
139 cpuid = cpu_info.cpu_num;
145 p = &cpu_data[cpuid];
146 boot_cpu_data.cpu_count++;
148 /* initialize counters - CPU 0 gets it_value set in time_init() */
150 memset(p, 0, sizeof(struct cpuinfo_parisc));
152 p->loops_per_jiffy = loops_per_jiffy;
153 p->dev = dev; /* Save IODC data in case we need it */
154 p->hpa = dev->hpa.start; /* save CPU hpa */
155 p->cpuid = cpuid; /* save CPU id */
156 p->txn_addr = txn_addr; /* save CPU IRQ address */
159 ** FIXME: review if any other initialization is clobbered
160 ** for boot_cpu by the above memset().
163 /* stolen from init_percpu_prof() */
164 cpu_data[cpuid].prof_counter = 1;
165 cpu_data[cpuid].prof_multiplier = 1;
169 ** CONFIG_SMP: init_smp_config() will attempt to get CPU's into
170 ** OS control. RENDEZVOUS is the default state - see mem_set above.
171 ** p->state = STATE_RENDEZVOUS;
175 /* CPU 0 IRQ table is statically allocated/initialized */
177 struct irqaction actions[];
180 ** itimer and ipi IRQ handlers are statically initialized in
181 ** arch/parisc/kernel/irq.c. ie Don't need to register them.
183 actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC);
185 /* not getting it's own table, share with monarch */
186 actions = cpu_irq_actions[0];
189 cpu_irq_actions[cpuid] = actions;
194 * Bring this CPU up now! (ignore bootstrap cpuid == 0)
198 cpu_set(cpuid, cpu_present_map);
203 /* If we've registered more than one cpu,
204 * we'll use the jiffies clocksource since cr16
205 * is not synchronized between CPUs.
207 update_cr16_clocksource();
213 * collect_boot_cpu_data - Fill the boot_cpu_data structure.
215 * This function collects and stores the generic processor information
216 * in the boot_cpu_data structure.
218 void __init collect_boot_cpu_data(void)
220 memset(&boot_cpu_data, 0, sizeof(boot_cpu_data));
222 boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */
224 /* get CPU-Model Information... */
225 #define p ((unsigned long *)&boot_cpu_data.pdc.model)
226 if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK)
228 "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
229 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]);
232 if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK)
233 printk(KERN_INFO "vers %08lx\n",
234 boot_cpu_data.pdc.versions);
236 if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK)
237 printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n",
238 (boot_cpu_data.pdc.cpuid >> 5) & 127,
239 boot_cpu_data.pdc.cpuid & 31,
240 boot_cpu_data.pdc.cpuid);
242 if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK)
243 printk(KERN_INFO "capabilities 0x%lx\n",
244 boot_cpu_data.pdc.capabilities);
246 if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK)
247 printk(KERN_INFO "model %s\n",
248 boot_cpu_data.pdc.sys_model_name);
250 boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
251 boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
253 boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion);
254 boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0];
255 boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1];
260 * init_cpu_profiler - enable/setup per cpu profiling hooks.
261 * @cpunum: The processor instance.
263 * FIXME: doesn't do much yet...
265 static inline void __init
266 init_percpu_prof(int cpunum)
268 cpu_data[cpunum].prof_counter = 1;
269 cpu_data[cpunum].prof_multiplier = 1;
274 * init_per_cpu - Handle individual processor initializations.
275 * @cpunum: logical processor number.
277 * This function handles initialization for *every* CPU
280 * o Set "default" CPU width for trap handlers
282 * o Enable FP coprocessor
283 * REVISIT: this could be done in the "code 22" trap handler.
284 * (frowands idea - that way we know which processes need FP
285 * registers saved on the interrupt stack.)
286 * NEWS FLASH: wide kernels need FP coprocessor enabled to handle
287 * formatted printing of %lx for example (double divides I think)
289 * o Enable CPU profiling hooks.
291 int __init init_per_cpu(int cpunum)
294 struct pdc_coproc_cfg coproc_cfg;
296 set_firmware_width();
297 ret = pdc_coproc_cfg(&coproc_cfg);
299 if(ret >= 0 && coproc_cfg.ccr_functional) {
300 mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */
302 /* FWIW, FP rev/model is a more accurate way to determine
303 ** CPU type. CPU rev/model has some ambiguous cases.
305 cpu_data[cpunum].fp_rev = coproc_cfg.revision;
306 cpu_data[cpunum].fp_model = coproc_cfg.model;
308 printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n",
309 cpunum, coproc_cfg.revision, coproc_cfg.model);
312 ** store status register to stack (hopefully aligned)
313 ** and clear the T-bit.
315 asm volatile ("fstd %fr0,8(%sp)");
318 printk(KERN_WARNING "WARNING: No FP CoProcessor?!"
319 " (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n"
321 "Halting Machine - FP required\n"
323 , coproc_cfg.ccr_functional);
325 mdelay(100); /* previous chars get pushed to console */
326 panic("FP CoProc not reported");
330 /* FUTURE: Enable Performance Monitor : ccr bit 0x20 */
331 init_percpu_prof(cpunum);
337 * Display cpu info for all cpu's.
340 show_cpuinfo (struct seq_file *m, void *v)
344 for(n=0; n<boot_cpu_data.cpu_count; n++) {
346 if (0 == cpu_data[n].hpa)
349 seq_printf(m, "processor\t: %d\n"
350 "cpu family\t: PA-RISC %s\n",
351 n, boot_cpu_data.family_name);
353 seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name );
356 seq_printf(m, "cpu MHz\t\t: %d.%06d\n",
357 boot_cpu_data.cpu_hz / 1000000,
358 boot_cpu_data.cpu_hz % 1000000 );
360 seq_printf(m, "model\t\t: %s\n"
361 "model name\t: %s\n",
362 boot_cpu_data.pdc.sys_model_name,
364 cpu_data[n].dev->name : "Unknown" );
366 seq_printf(m, "hversion\t: 0x%08x\n"
367 "sversion\t: 0x%08x\n",
368 boot_cpu_data.hversion,
369 boot_cpu_data.sversion );
371 /* print cachesize info */
374 seq_printf(m, "bogomips\t: %lu.%02lu\n",
375 cpu_data[n].loops_per_jiffy / (500000 / HZ),
376 (cpu_data[n].loops_per_jiffy / (5000 / HZ)) % 100);
378 seq_printf(m, "software id\t: %ld\n\n",
379 boot_cpu_data.pdc.model.sw_id);
384 static struct parisc_device_id processor_tbl[] __read_mostly = {
385 { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID },
389 static struct parisc_driver cpu_driver __read_mostly = {
391 .id_table = processor_tbl,
392 .probe = processor_probe
396 * processor_init - Processor initalization procedure.
398 * Register this driver.
400 void __init processor_init(void)
402 register_parisc_driver(&cpu_driver);