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>
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;
52 ** PARISC CPU driver - claim "device" and initialize CPU data structures.
54 ** Consolidate per CPU initialization into (mostly) one module.
55 ** Monarch CPU will initialize boot_cpu_data which shouldn't
56 ** change once the system has booted.
58 ** The callback *should* do per-instance initialization of
59 ** everything including the monarch. "Per CPU" init code in
60 ** setup.c:start_parisc() has migrated here and start_parisc()
61 ** will call register_parisc_driver(&cpu_driver) before calling do_inventory().
63 ** The goal of consolidating CPU initialization into one place is
64 ** to make sure all CPU's get initialized the same way.
65 ** The code path not shared is how PDC hands control of the CPU to the OS.
66 ** The initialization of OS data structures is the same (done below).
70 * processor_probe - Determine if processor driver should claim this device.
71 * @dev: The device which has been found.
73 * Determine if processor driver should claim this chip (return 0) or not
74 * (return 1). If so, initialize the chip and tell other partners in crime
75 * they have work to do.
77 static int __init processor_probe(struct parisc_device *dev)
79 unsigned long txn_addr;
81 struct cpuinfo_parisc *p;
84 if (boot_cpu_data.cpu_count > 0) {
85 printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n");
90 /* logical CPU ID and update global counter
91 * May get overwritten by PAT code.
93 cpuid = boot_cpu_data.cpu_count;
94 txn_addr = dev->hpa.start; /* for legacy PDC */
99 unsigned long bytecnt;
100 pdc_pat_cell_mod_maddr_block_t pa_pdc_cell;
103 struct pdc_pat_cpu_num cpu_info;
106 status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,
107 dev->mod_index, PA_VIEW, &pa_pdc_cell);
109 BUG_ON(PDC_OK != status);
111 /* verify it's the same as what do_pat_inventory() found */
112 BUG_ON(dev->mod_info != pa_pdc_cell.mod_info);
113 BUG_ON(dev->pmod_loc != pa_pdc_cell.mod_location);
115 txn_addr = pa_pdc_cell.mod[0]; /* id_eid for IO sapic */
118 /* We need contiguous numbers for cpuid. Firmware's notion
119 * of cpuid is for physical CPUs and we just don't care yet.
120 * We'll care when we need to query PAT PDC about a CPU *after*
121 * boot time (ie shutdown a CPU from an OS perspective).
123 /* get the cpu number */
124 status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);
126 BUG_ON(PDC_OK != status);
128 if (cpu_info.cpu_num >= NR_CPUS) {
129 printk(KERN_WARNING "IGNORING CPU at 0x%x,"
130 " cpu_slot_id > NR_CPUS"
132 dev->hpa.start, cpu_info.cpu_num, NR_CPUS);
133 /* Ignore CPU since it will only crash */
134 boot_cpu_data.cpu_count--;
137 cpuid = cpu_info.cpu_num;
143 p = &cpu_data[cpuid];
144 boot_cpu_data.cpu_count++;
146 /* initialize counters */
147 memset(p, 0, sizeof(struct cpuinfo_parisc));
149 p->loops_per_jiffy = loops_per_jiffy;
150 p->dev = dev; /* Save IODC data in case we need it */
151 p->hpa = dev->hpa.start; /* save CPU hpa */
152 p->cpuid = cpuid; /* save CPU id */
153 p->txn_addr = txn_addr; /* save CPU IRQ address */
155 spin_lock_init(&p->lock);
158 ** FIXME: review if any other initialization is clobbered
159 ** for boot_cpu by the above memset().
162 /* stolen from init_percpu_prof() */
163 cpu_data[cpuid].prof_counter = 1;
164 cpu_data[cpuid].prof_multiplier = 1;
168 ** CONFIG_SMP: init_smp_config() will attempt to get CPU's into
169 ** OS control. RENDEZVOUS is the default state - see mem_set above.
170 ** p->state = STATE_RENDEZVOUS;
174 /* CPU 0 IRQ table is statically allocated/initialized */
176 struct irqaction actions[];
179 ** itimer and ipi IRQ handlers are statically initialized in
180 ** arch/parisc/kernel/irq.c. ie Don't need to register them.
182 actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC);
184 /* not getting it's own table, share with monarch */
185 actions = cpu_irq_actions[0];
188 cpu_irq_actions[cpuid] = actions;
193 * Bring this CPU up now! (ignore bootstrap cpuid == 0)
197 cpu_set(cpuid, cpu_present_map);
206 * collect_boot_cpu_data - Fill the boot_cpu_data structure.
208 * This function collects and stores the generic processor information
209 * in the boot_cpu_data structure.
211 void __init collect_boot_cpu_data(void)
213 memset(&boot_cpu_data, 0, sizeof(boot_cpu_data));
215 boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */
217 /* get CPU-Model Information... */
218 #define p ((unsigned long *)&boot_cpu_data.pdc.model)
219 if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK)
221 "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
222 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]);
225 if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK)
226 printk(KERN_INFO "vers %08lx\n",
227 boot_cpu_data.pdc.versions);
229 if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK)
230 printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n",
231 (boot_cpu_data.pdc.cpuid >> 5) & 127,
232 boot_cpu_data.pdc.cpuid & 31,
233 boot_cpu_data.pdc.cpuid);
235 if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK)
236 printk(KERN_INFO "capabilities 0x%lx\n",
237 boot_cpu_data.pdc.capabilities);
239 if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK)
240 printk(KERN_INFO "model %s\n",
241 boot_cpu_data.pdc.sys_model_name);
243 boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
244 boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
246 boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion);
247 boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0];
248 boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1];
253 * init_cpu_profiler - enable/setup per cpu profiling hooks.
254 * @cpunum: The processor instance.
256 * FIXME: doesn't do much yet...
258 static inline void __init
259 init_percpu_prof(int cpunum)
261 cpu_data[cpunum].prof_counter = 1;
262 cpu_data[cpunum].prof_multiplier = 1;
267 * init_per_cpu - Handle individual processor initializations.
268 * @cpunum: logical processor number.
270 * This function handles initialization for *every* CPU
273 * o Set "default" CPU width for trap handlers
275 * o Enable FP coprocessor
276 * REVISIT: this could be done in the "code 22" trap handler.
277 * (frowands idea - that way we know which processes need FP
278 * registers saved on the interrupt stack.)
279 * NEWS FLASH: wide kernels need FP coprocessor enabled to handle
280 * formatted printing of %lx for example (double divides I think)
282 * o Enable CPU profiling hooks.
284 int __init init_per_cpu(int cpunum)
287 struct pdc_coproc_cfg coproc_cfg;
289 set_firmware_width();
290 ret = pdc_coproc_cfg(&coproc_cfg);
292 if(ret >= 0 && coproc_cfg.ccr_functional) {
293 mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */
295 /* FWIW, FP rev/model is a more accurate way to determine
296 ** CPU type. CPU rev/model has some ambiguous cases.
298 cpu_data[cpunum].fp_rev = coproc_cfg.revision;
299 cpu_data[cpunum].fp_model = coproc_cfg.model;
301 printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n",
302 cpunum, coproc_cfg.revision, coproc_cfg.model);
305 ** store status register to stack (hopefully aligned)
306 ** and clear the T-bit.
308 asm volatile ("fstd %fr0,8(%sp)");
311 printk(KERN_WARNING "WARNING: No FP CoProcessor?!"
312 " (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n"
314 "Halting Machine - FP required\n"
316 , coproc_cfg.ccr_functional);
318 mdelay(100); /* previous chars get pushed to console */
319 panic("FP CoProc not reported");
323 /* FUTURE: Enable Performance Monitor : ccr bit 0x20 */
324 init_percpu_prof(cpunum);
330 * Display cpu info for all cpu's.
333 show_cpuinfo (struct seq_file *m, void *v)
337 for(n=0; n<boot_cpu_data.cpu_count; n++) {
339 if (0 == cpu_data[n].hpa)
341 #ifdef ENTRY_SYS_CPUS
342 #error iCOD support wants to show CPU state here
345 seq_printf(m, "processor\t: %d\n"
346 "cpu family\t: PA-RISC %s\n",
347 n, boot_cpu_data.family_name);
349 seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name );
352 seq_printf(m, "cpu MHz\t\t: %d.%06d\n",
353 boot_cpu_data.cpu_hz / 1000000,
354 boot_cpu_data.cpu_hz % 1000000 );
356 seq_printf(m, "model\t\t: %s\n"
357 "model name\t: %s\n",
358 boot_cpu_data.pdc.sys_model_name,
360 cpu_data[n].dev->name : "Unknown" );
362 seq_printf(m, "hversion\t: 0x%08x\n"
363 "sversion\t: 0x%08x\n",
364 boot_cpu_data.hversion,
365 boot_cpu_data.sversion );
367 /* print cachesize info */
370 seq_printf(m, "bogomips\t: %lu.%02lu\n",
371 cpu_data[n].loops_per_jiffy / (500000 / HZ),
372 (cpu_data[n].loops_per_jiffy / (5000 / HZ)) % 100);
374 seq_printf(m, "software id\t: %ld\n\n",
375 boot_cpu_data.pdc.model.sw_id);
380 static struct parisc_device_id processor_tbl[] __read_mostly = {
381 { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID },
385 static struct parisc_driver cpu_driver __read_mostly = {
387 .id_table = processor_tbl,
388 .probe = processor_probe
392 * processor_init - Processor initalization procedure.
394 * Register this driver.
396 void __init processor_init(void)
398 register_parisc_driver(&cpu_driver);