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 int _parisc_requires_coherency __read_mostly;
49 EXPORT_SYMBOL(_parisc_requires_coherency);
52 DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data);
54 extern int update_cr16_clocksource(void); /* from time.c */
57 ** PARISC CPU driver - claim "device" and initialize CPU data structures.
59 ** Consolidate per CPU initialization into (mostly) one module.
60 ** Monarch CPU will initialize boot_cpu_data which shouldn't
61 ** change once the system has booted.
63 ** The callback *should* do per-instance initialization of
64 ** everything including the monarch. "Per CPU" init code in
65 ** setup.c:start_parisc() has migrated here and start_parisc()
66 ** will call register_parisc_driver(&cpu_driver) before calling do_inventory().
68 ** The goal of consolidating CPU initialization into one place is
69 ** to make sure all CPUs get initialized the same way.
70 ** The code path not shared is how PDC hands control of the CPU to the OS.
71 ** The initialization of OS data structures is the same (done below).
75 * init_cpu_profiler - enable/setup per cpu profiling hooks.
76 * @cpunum: The processor instance.
78 * FIXME: doesn't do much yet...
81 init_percpu_prof(unsigned long cpunum)
83 struct cpuinfo_parisc *p;
85 p = &per_cpu(cpu_data, cpunum);
87 p->prof_multiplier = 1;
92 * processor_probe - Determine if processor driver should claim this device.
93 * @dev: The device which has been found.
95 * Determine if processor driver should claim this chip (return 0) or not
96 * (return 1). If so, initialize the chip and tell other partners in crime
97 * they have work to do.
99 static int processor_probe(struct parisc_device *dev)
101 unsigned long txn_addr;
103 struct cpuinfo_parisc *p;
106 if (num_online_cpus() >= nr_cpu_ids) {
107 printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n");
111 if (boot_cpu_data.cpu_count > 0) {
112 printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n");
117 /* logical CPU ID and update global counter
118 * May get overwritten by PAT code.
120 cpuid = boot_cpu_data.cpu_count;
121 txn_addr = dev->hpa.start; /* for legacy PDC */
126 unsigned long bytecnt;
127 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
130 struct pdc_pat_cpu_num cpu_info;
133 pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);
135 panic("couldn't allocate memory for PDC_PAT_CELL!");
137 status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,
138 dev->mod_index, PA_VIEW, pa_pdc_cell);
140 BUG_ON(PDC_OK != status);
142 /* verify it's the same as what do_pat_inventory() found */
143 BUG_ON(dev->mod_info != pa_pdc_cell->mod_info);
144 BUG_ON(dev->pmod_loc != pa_pdc_cell->mod_location);
146 txn_addr = pa_pdc_cell->mod[0]; /* id_eid for IO sapic */
151 /* We need contiguous numbers for cpuid. Firmware's notion
152 * of cpuid is for physical CPUs and we just don't care yet.
153 * We'll care when we need to query PAT PDC about a CPU *after*
154 * boot time (ie shutdown a CPU from an OS perspective).
156 /* get the cpu number */
157 status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);
159 BUG_ON(PDC_OK != status);
161 if (cpu_info.cpu_num >= NR_CPUS) {
162 printk(KERN_WARNING "IGNORING CPU at 0x%x,"
163 " cpu_slot_id > NR_CPUS"
165 dev->hpa.start, cpu_info.cpu_num, NR_CPUS);
166 /* Ignore CPU since it will only crash */
167 boot_cpu_data.cpu_count--;
170 cpuid = cpu_info.cpu_num;
176 p = &per_cpu(cpu_data, cpuid);
177 boot_cpu_data.cpu_count++;
179 /* initialize counters - CPU 0 gets it_value set in time_init() */
181 memset(p, 0, sizeof(struct cpuinfo_parisc));
183 p->loops_per_jiffy = loops_per_jiffy;
184 p->dev = dev; /* Save IODC data in case we need it */
185 p->hpa = dev->hpa.start; /* save CPU hpa */
186 p->cpuid = cpuid; /* save CPU id */
187 p->txn_addr = txn_addr; /* save CPU IRQ address */
190 ** FIXME: review if any other initialization is clobbered
191 ** for boot_cpu by the above memset().
193 init_percpu_prof(cpuid);
197 ** CONFIG_SMP: init_smp_config() will attempt to get CPUs into
198 ** OS control. RENDEZVOUS is the default state - see mem_set above.
199 ** p->state = STATE_RENDEZVOUS;
203 /* CPU 0 IRQ table is statically allocated/initialized */
205 struct irqaction actions[];
208 ** itimer and ipi IRQ handlers are statically initialized in
209 ** arch/parisc/kernel/irq.c. ie Don't need to register them.
211 actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC);
213 /* not getting it's own table, share with monarch */
214 actions = cpu_irq_actions[0];
217 cpu_irq_actions[cpuid] = actions;
222 * Bring this CPU up now! (ignore bootstrap cpuid == 0)
226 set_cpu_present(cpuid, true);
231 /* If we've registered more than one cpu,
232 * we'll use the jiffies clocksource since cr16
233 * is not synchronized between CPUs.
235 update_cr16_clocksource();
241 * collect_boot_cpu_data - Fill the boot_cpu_data structure.
243 * This function collects and stores the generic processor information
244 * in the boot_cpu_data structure.
246 void __init collect_boot_cpu_data(void)
248 memset(&boot_cpu_data, 0, sizeof(boot_cpu_data));
250 boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */
252 /* get CPU-Model Information... */
253 #define p ((unsigned long *)&boot_cpu_data.pdc.model)
254 if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK)
256 "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
257 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]);
260 if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK)
261 printk(KERN_INFO "vers %08lx\n",
262 boot_cpu_data.pdc.versions);
264 if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK)
265 printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n",
266 (boot_cpu_data.pdc.cpuid >> 5) & 127,
267 boot_cpu_data.pdc.cpuid & 31,
268 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 boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
279 boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
281 boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion);
282 boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0];
283 boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1];
286 _parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) ||
287 (boot_cpu_data.cpu_type == mako2);
293 * init_per_cpu - Handle individual processor initializations.
294 * @cpunum: logical processor number.
296 * This function handles initialization for *every* CPU
299 * o Set "default" CPU width for trap handlers
301 * o Enable FP coprocessor
302 * REVISIT: this could be done in the "code 22" trap handler.
303 * (frowands idea - that way we know which processes need FP
304 * registers saved on the interrupt stack.)
305 * NEWS FLASH: wide kernels need FP coprocessor enabled to handle
306 * formatted printing of %lx for example (double divides I think)
308 * o Enable CPU profiling hooks.
310 int init_per_cpu(int cpunum)
313 struct pdc_coproc_cfg coproc_cfg;
315 set_firmware_width();
316 ret = pdc_coproc_cfg(&coproc_cfg);
318 if(ret >= 0 && coproc_cfg.ccr_functional) {
319 mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */
321 /* FWIW, FP rev/model is a more accurate way to determine
322 ** CPU type. CPU rev/model has some ambiguous cases.
324 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
325 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
328 printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n",
329 cpunum, coproc_cfg.revision, coproc_cfg.model);
332 ** store status register to stack (hopefully aligned)
333 ** and clear the T-bit.
335 asm volatile ("fstd %fr0,8(%sp)");
338 printk(KERN_WARNING "WARNING: No FP CoProcessor?!"
339 " (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n"
341 "Halting Machine - FP required\n"
343 , coproc_cfg.ccr_functional);
345 mdelay(100); /* previous chars get pushed to console */
346 panic("FP CoProc not reported");
350 /* FUTURE: Enable Performance Monitor : ccr bit 0x20 */
351 init_percpu_prof(cpunum);
357 * Display CPU info for all CPUs.
360 show_cpuinfo (struct seq_file *m, void *v)
364 for_each_online_cpu(cpu) {
365 const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
367 if (0 == cpuinfo->hpa)
370 seq_printf(m, "processor\t: %lu\n"
371 "cpu family\t: PA-RISC %s\n",
372 cpu, boot_cpu_data.family_name);
374 seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name );
377 seq_printf(m, "cpu MHz\t\t: %d.%06d\n",
378 boot_cpu_data.cpu_hz / 1000000,
379 boot_cpu_data.cpu_hz % 1000000 );
381 seq_printf(m, "capabilities\t:");
382 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)
383 seq_puts(m, " os32");
384 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)
385 seq_puts(m, " os64");
386 if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC)
387 seq_puts(m, " iopdir_fdc");
388 switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) {
389 case PDC_MODEL_NVA_SUPPORTED:
390 seq_puts(m, " nva_supported");
392 case PDC_MODEL_NVA_SLOW:
393 seq_puts(m, " nva_slow");
395 case PDC_MODEL_NVA_UNSUPPORTED:
396 seq_puts(m, " needs_equivalent_aliasing");
399 seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities);
401 seq_printf(m, "model\t\t: %s\n"
402 "model name\t: %s\n",
403 boot_cpu_data.pdc.sys_model_name,
405 cpuinfo->dev->name : "Unknown");
407 seq_printf(m, "hversion\t: 0x%08x\n"
408 "sversion\t: 0x%08x\n",
409 boot_cpu_data.hversion,
410 boot_cpu_data.sversion );
412 /* print cachesize info */
415 seq_printf(m, "bogomips\t: %lu.%02lu\n",
416 cpuinfo->loops_per_jiffy / (500000 / HZ),
417 (cpuinfo->loops_per_jiffy / (5000 / HZ)) % 100);
419 seq_printf(m, "software id\t: %ld\n\n",
420 boot_cpu_data.pdc.model.sw_id);
425 static const struct parisc_device_id processor_tbl[] = {
426 { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID },
430 static struct parisc_driver cpu_driver = {
432 .id_table = processor_tbl,
433 .probe = processor_probe
437 * processor_init - Processor initialization procedure.
439 * Register this driver.
441 void __init processor_init(void)
443 register_parisc_driver(&cpu_driver);