411 lines
12 KiB
C
411 lines
12 KiB
C
/* $Id: processor.c,v 1.1 2002/07/20 16:27:06 rhirst Exp $
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*
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* Initial setup-routines for HP 9000 based hardware.
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*
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* Copyright (C) 1991, 1992, 1995 Linus Torvalds
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* Modifications for PA-RISC (C) 1999-2008 Helge Deller <deller@gmx.de>
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* Modifications copyright 1999 SuSE GmbH (Philipp Rumpf)
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* Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net>
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* Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org>
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* Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net>
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*
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* Initial PA-RISC Version: 04-23-1999 by Helge Deller
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/cpu.h>
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#include <asm/param.h>
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#include <asm/cache.h>
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#include <asm/hardware.h> /* for register_parisc_driver() stuff */
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <asm/pdc.h>
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#include <asm/pdcpat.h>
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#include <asm/irq.h> /* for struct irq_region */
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#include <asm/parisc-device.h>
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struct system_cpuinfo_parisc boot_cpu_data __read_mostly;
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EXPORT_SYMBOL(boot_cpu_data);
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DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data);
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extern int update_cr16_clocksource(void); /* from time.c */
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/*
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** PARISC CPU driver - claim "device" and initialize CPU data structures.
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**
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** Consolidate per CPU initialization into (mostly) one module.
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** Monarch CPU will initialize boot_cpu_data which shouldn't
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** change once the system has booted.
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**
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** The callback *should* do per-instance initialization of
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** everything including the monarch. "Per CPU" init code in
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** setup.c:start_parisc() has migrated here and start_parisc()
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** will call register_parisc_driver(&cpu_driver) before calling do_inventory().
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**
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** The goal of consolidating CPU initialization into one place is
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** to make sure all CPUs get initialized the same way.
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** The code path not shared is how PDC hands control of the CPU to the OS.
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** The initialization of OS data structures is the same (done below).
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*/
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/**
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* init_cpu_profiler - enable/setup per cpu profiling hooks.
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* @cpunum: The processor instance.
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*
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* FIXME: doesn't do much yet...
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*/
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static void __cpuinit
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init_percpu_prof(unsigned long cpunum)
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{
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struct cpuinfo_parisc *p;
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p = &per_cpu(cpu_data, cpunum);
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p->prof_counter = 1;
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p->prof_multiplier = 1;
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}
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/**
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* processor_probe - Determine if processor driver should claim this device.
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* @dev: The device which has been found.
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*
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* Determine if processor driver should claim this chip (return 0) or not
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* (return 1). If so, initialize the chip and tell other partners in crime
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* they have work to do.
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*/
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static int __cpuinit processor_probe(struct parisc_device *dev)
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{
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unsigned long txn_addr;
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unsigned long cpuid;
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struct cpuinfo_parisc *p;
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#ifdef CONFIG_SMP
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if (num_online_cpus() >= NR_CPUS) {
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printk(KERN_INFO "num_online_cpus() >= NR_CPUS\n");
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return 1;
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}
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#else
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if (boot_cpu_data.cpu_count > 0) {
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printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n");
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return 1;
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}
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#endif
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/* logical CPU ID and update global counter
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* May get overwritten by PAT code.
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*/
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cpuid = boot_cpu_data.cpu_count;
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txn_addr = dev->hpa.start; /* for legacy PDC */
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#ifdef CONFIG_64BIT
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if (is_pdc_pat()) {
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ulong status;
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unsigned long bytecnt;
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pdc_pat_cell_mod_maddr_block_t pa_pdc_cell;
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#undef USE_PAT_CPUID
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#ifdef USE_PAT_CPUID
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struct pdc_pat_cpu_num cpu_info;
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#endif
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status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,
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dev->mod_index, PA_VIEW, &pa_pdc_cell);
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BUG_ON(PDC_OK != status);
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/* verify it's the same as what do_pat_inventory() found */
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BUG_ON(dev->mod_info != pa_pdc_cell.mod_info);
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BUG_ON(dev->pmod_loc != pa_pdc_cell.mod_location);
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txn_addr = pa_pdc_cell.mod[0]; /* id_eid for IO sapic */
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#ifdef USE_PAT_CPUID
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/* We need contiguous numbers for cpuid. Firmware's notion
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* of cpuid is for physical CPUs and we just don't care yet.
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* We'll care when we need to query PAT PDC about a CPU *after*
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* boot time (ie shutdown a CPU from an OS perspective).
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*/
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/* get the cpu number */
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status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);
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BUG_ON(PDC_OK != status);
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if (cpu_info.cpu_num >= NR_CPUS) {
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printk(KERN_WARNING "IGNORING CPU at 0x%x,"
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" cpu_slot_id > NR_CPUS"
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" (%ld > %d)\n",
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dev->hpa.start, cpu_info.cpu_num, NR_CPUS);
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/* Ignore CPU since it will only crash */
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boot_cpu_data.cpu_count--;
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return 1;
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} else {
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cpuid = cpu_info.cpu_num;
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}
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#endif
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}
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#endif
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p = &per_cpu(cpu_data, cpuid);
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boot_cpu_data.cpu_count++;
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/* initialize counters - CPU 0 gets it_value set in time_init() */
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if (cpuid)
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memset(p, 0, sizeof(struct cpuinfo_parisc));
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p->loops_per_jiffy = loops_per_jiffy;
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p->dev = dev; /* Save IODC data in case we need it */
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p->hpa = dev->hpa.start; /* save CPU hpa */
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p->cpuid = cpuid; /* save CPU id */
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p->txn_addr = txn_addr; /* save CPU IRQ address */
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#ifdef CONFIG_SMP
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/*
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** FIXME: review if any other initialization is clobbered
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** for boot_cpu by the above memset().
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*/
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init_percpu_prof(cpuid);
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#endif
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/*
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** CONFIG_SMP: init_smp_config() will attempt to get CPUs into
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** OS control. RENDEZVOUS is the default state - see mem_set above.
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** p->state = STATE_RENDEZVOUS;
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*/
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#if 0
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/* CPU 0 IRQ table is statically allocated/initialized */
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if (cpuid) {
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struct irqaction actions[];
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/*
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** itimer and ipi IRQ handlers are statically initialized in
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** arch/parisc/kernel/irq.c. ie Don't need to register them.
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*/
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actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC);
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if (!actions) {
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/* not getting it's own table, share with monarch */
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actions = cpu_irq_actions[0];
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}
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cpu_irq_actions[cpuid] = actions;
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}
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#endif
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/*
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* Bring this CPU up now! (ignore bootstrap cpuid == 0)
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*/
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#ifdef CONFIG_SMP
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if (cpuid) {
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cpu_set(cpuid, cpu_present_map);
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cpu_up(cpuid);
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}
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#endif
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/* If we've registered more than one cpu,
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* we'll use the jiffies clocksource since cr16
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* is not synchronized between CPUs.
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*/
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update_cr16_clocksource();
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return 0;
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}
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/**
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* collect_boot_cpu_data - Fill the boot_cpu_data structure.
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*
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* This function collects and stores the generic processor information
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* in the boot_cpu_data structure.
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*/
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void __init collect_boot_cpu_data(void)
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{
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memset(&boot_cpu_data, 0, sizeof(boot_cpu_data));
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boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */
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/* get CPU-Model Information... */
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#define p ((unsigned long *)&boot_cpu_data.pdc.model)
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if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK)
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printk(KERN_INFO
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"model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
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p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]);
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#undef p
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if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK)
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printk(KERN_INFO "vers %08lx\n",
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boot_cpu_data.pdc.versions);
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if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK)
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printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n",
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(boot_cpu_data.pdc.cpuid >> 5) & 127,
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boot_cpu_data.pdc.cpuid & 31,
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boot_cpu_data.pdc.cpuid);
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if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK)
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printk(KERN_INFO "capabilities 0x%lx\n",
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boot_cpu_data.pdc.capabilities);
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if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK)
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printk(KERN_INFO "model %s\n",
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boot_cpu_data.pdc.sys_model_name);
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boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
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boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
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boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion);
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boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0];
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boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1];
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}
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/**
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* init_per_cpu - Handle individual processor initializations.
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* @cpunum: logical processor number.
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*
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* This function handles initialization for *every* CPU
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* in the system:
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*
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* o Set "default" CPU width for trap handlers
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*
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* o Enable FP coprocessor
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* REVISIT: this could be done in the "code 22" trap handler.
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* (frowands idea - that way we know which processes need FP
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* registers saved on the interrupt stack.)
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* NEWS FLASH: wide kernels need FP coprocessor enabled to handle
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* formatted printing of %lx for example (double divides I think)
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*
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* o Enable CPU profiling hooks.
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*/
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int __cpuinit init_per_cpu(int cpunum)
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{
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int ret;
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struct pdc_coproc_cfg coproc_cfg;
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set_firmware_width();
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ret = pdc_coproc_cfg(&coproc_cfg);
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if(ret >= 0 && coproc_cfg.ccr_functional) {
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mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */
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/* FWIW, FP rev/model is a more accurate way to determine
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** CPU type. CPU rev/model has some ambiguous cases.
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*/
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per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
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per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
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printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n",
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cpunum, coproc_cfg.revision, coproc_cfg.model);
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/*
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** store status register to stack (hopefully aligned)
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** and clear the T-bit.
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*/
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asm volatile ("fstd %fr0,8(%sp)");
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} else {
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printk(KERN_WARNING "WARNING: No FP CoProcessor?!"
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" (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n"
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#ifdef CONFIG_64BIT
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"Halting Machine - FP required\n"
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#endif
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, coproc_cfg.ccr_functional);
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#ifdef CONFIG_64BIT
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mdelay(100); /* previous chars get pushed to console */
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panic("FP CoProc not reported");
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#endif
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}
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/* FUTURE: Enable Performance Monitor : ccr bit 0x20 */
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init_percpu_prof(cpunum);
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return ret;
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}
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/*
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* Display CPU info for all CPUs.
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*/
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int
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show_cpuinfo (struct seq_file *m, void *v)
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{
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unsigned long cpu;
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for_each_online_cpu(cpu) {
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const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
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#ifdef CONFIG_SMP
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if (0 == cpuinfo->hpa)
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continue;
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#endif
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seq_printf(m, "processor\t: %lu\n"
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"cpu family\t: PA-RISC %s\n",
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cpu, boot_cpu_data.family_name);
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seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name );
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/* cpu MHz */
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seq_printf(m, "cpu MHz\t\t: %d.%06d\n",
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boot_cpu_data.cpu_hz / 1000000,
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boot_cpu_data.cpu_hz % 1000000 );
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seq_printf(m, "model\t\t: %s\n"
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"model name\t: %s\n",
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boot_cpu_data.pdc.sys_model_name,
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cpuinfo->dev ?
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cpuinfo->dev->name : "Unknown");
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seq_printf(m, "hversion\t: 0x%08x\n"
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"sversion\t: 0x%08x\n",
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boot_cpu_data.hversion,
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boot_cpu_data.sversion );
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/* print cachesize info */
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show_cache_info(m);
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seq_printf(m, "bogomips\t: %lu.%02lu\n",
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cpuinfo->loops_per_jiffy / (500000 / HZ),
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(cpuinfo->loops_per_jiffy / (5000 / HZ)) % 100);
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seq_printf(m, "software id\t: %ld\n\n",
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boot_cpu_data.pdc.model.sw_id);
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}
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return 0;
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}
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static const struct parisc_device_id processor_tbl[] = {
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{ HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID },
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{ 0, }
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};
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static struct parisc_driver cpu_driver = {
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.name = "CPU",
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.id_table = processor_tbl,
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.probe = processor_probe
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};
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/**
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* processor_init - Processor initialization procedure.
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*
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* Register this driver.
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*/
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void __init processor_init(void)
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{
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register_parisc_driver(&cpu_driver);
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}
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