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Diffstat (limited to 'arch/parisc/kernel/processor.c')
| -rw-r--r-- | arch/parisc/kernel/processor.c | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c new file mode 100644 index 000000000000..13b721cb9f55 --- /dev/null +++ b/arch/parisc/kernel/processor.c @@ -0,0 +1,400 @@ +/* $Id: processor.c,v 1.1 2002/07/20 16:27:06 rhirst Exp $ + * + * Initial setup-routines for HP 9000 based hardware. + * + * Copyright (C) 1991, 1992, 1995 Linus Torvalds + * Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de> + * Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) + * Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net> + * Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org> + * Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net> + * + * Initial PA-RISC Version: 04-23-1999 by Helge Deller + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ +#include <linux/config.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/seq_file.h> +#include <linux/slab.h> +#include <linux/cpu.h> + +#include <asm/cache.h> +#include <asm/hardware.h> /* for register_parisc_driver() stuff */ +#include <asm/processor.h> +#include <asm/page.h> +#include <asm/pdc.h> +#include <asm/pdcpat.h> +#include <asm/irq.h> /* for struct irq_region */ +#include <asm/parisc-device.h> + +struct system_cpuinfo_parisc boot_cpu_data; +EXPORT_SYMBOL(boot_cpu_data); + +struct cpuinfo_parisc cpu_data[NR_CPUS]; + +/* +** PARISC CPU driver - claim "device" and initialize CPU data structures. +** +** Consolidate per CPU initialization into (mostly) one module. +** Monarch CPU will initialize boot_cpu_data which shouldn't +** change once the system has booted. +** +** The callback *should* do per-instance initialization of +** everything including the monarch. "Per CPU" init code in +** setup.c:start_parisc() has migrated here and start_parisc() +** will call register_parisc_driver(&cpu_driver) before calling do_inventory(). +** +** The goal of consolidating CPU initialization into one place is +** to make sure all CPU's get initialized the same way. +** The code path not shared is how PDC hands control of the CPU to the OS. +** The initialization of OS data structures is the same (done below). +*/ + +/** + * processor_probe - Determine if processor driver should claim this device. + * @dev: The device which has been found. + * + * Determine if processor driver should claim this chip (return 0) or not + * (return 1). If so, initialize the chip and tell other partners in crime + * they have work to do. + */ +static int __init processor_probe(struct parisc_device *dev) +{ + unsigned long txn_addr; + unsigned long cpuid; + struct cpuinfo_parisc *p; + +#ifndef CONFIG_SMP + if (boot_cpu_data.cpu_count > 0) { + printk(KERN_INFO "CONFIG_SMP=n ignoring additional CPUs\n"); + return 1; + } +#endif + + /* logical CPU ID and update global counter + * May get overwritten by PAT code. + */ + cpuid = boot_cpu_data.cpu_count; + txn_addr = dev->hpa; /* for legacy PDC */ + +#ifdef __LP64__ + if (is_pdc_pat()) { + ulong status; + unsigned long bytecnt; + pdc_pat_cell_mod_maddr_block_t pa_pdc_cell; +#undef USE_PAT_CPUID +#ifdef USE_PAT_CPUID + struct pdc_pat_cpu_num cpu_info; +#endif + + status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc, + dev->mod_index, PA_VIEW, &pa_pdc_cell); + + BUG_ON(PDC_OK != status); + + /* verify it's the same as what do_pat_inventory() found */ + BUG_ON(dev->mod_info != pa_pdc_cell.mod_info); + BUG_ON(dev->pmod_loc != pa_pdc_cell.mod_location); + + txn_addr = pa_pdc_cell.mod[0]; /* id_eid for IO sapic */ + +#ifdef USE_PAT_CPUID +/* We need contiguous numbers for cpuid. Firmware's notion + * of cpuid is for physical CPUs and we just don't care yet. + * We'll care when we need to query PAT PDC about a CPU *after* + * boot time (ie shutdown a CPU from an OS perspective). + */ + /* get the cpu number */ + status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa); + + BUG_ON(PDC_OK != status); + + if (cpu_info.cpu_num >= NR_CPUS) { + printk(KERN_WARNING "IGNORING CPU at 0x%x," + " cpu_slot_id > NR_CPUS" + " (%ld > %d)\n", + dev->hpa, cpu_info.cpu_num, NR_CPUS); + /* Ignore CPU since it will only crash */ + boot_cpu_data.cpu_count--; + return 1; + } else { + cpuid = cpu_info.cpu_num; + } +#endif + } +#endif + + p = &cpu_data[cpuid]; + boot_cpu_data.cpu_count++; + + /* initialize counters */ + memset(p, 0, sizeof(struct cpuinfo_parisc)); + + p->loops_per_jiffy = loops_per_jiffy; + p->dev = dev; /* Save IODC data in case we need it */ + p->hpa = dev->hpa; /* save CPU hpa */ + p->cpuid = cpuid; /* save CPU id */ + p->txn_addr = txn_addr; /* save CPU IRQ address */ +#ifdef CONFIG_SMP + spin_lock_init(&p->lock); + + /* + ** FIXME: review if any other initialization is clobbered + ** for boot_cpu by the above memset(). + */ + + /* stolen from init_percpu_prof() */ + cpu_data[cpuid].prof_counter = 1; + cpu_data[cpuid].prof_multiplier = 1; +#endif + + /* + ** CONFIG_SMP: init_smp_config() will attempt to get CPU's into + ** OS control. RENDEZVOUS is the default state - see mem_set above. + ** p->state = STATE_RENDEZVOUS; + */ + +#if 0 + /* CPU 0 IRQ table is statically allocated/initialized */ + if (cpuid) { + struct irqaction actions[]; + + /* + ** itimer and ipi IRQ handlers are statically initialized in + ** arch/parisc/kernel/irq.c. ie Don't need to register them. + */ + actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC); + if (!actions) { + /* not getting it's own table, share with monarch */ + actions = cpu_irq_actions[0]; + } + + cpu_irq_actions[cpuid] = actions; + } +#endif + + /* + * Bring this CPU up now! (ignore bootstrap cpuid == 0) + */ +#ifdef CONFIG_SMP + if (cpuid) { + cpu_set(cpuid, cpu_present_map); + cpu_up(cpuid); + } +#endif + + return 0; +} + +/** + * collect_boot_cpu_data - Fill the boot_cpu_data structure. + * + * This function collects and stores the generic processor information + * in the boot_cpu_data structure. + */ +void __init collect_boot_cpu_data(void) +{ + memset(&boot_cpu_data, 0, sizeof(boot_cpu_data)); + + boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */ + + /* get CPU-Model Information... */ +#define p ((unsigned long *)&boot_cpu_data.pdc.model) + if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK) + printk(KERN_INFO + "model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n", + p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]); +#undef p + + if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK) + printk(KERN_INFO "vers %08lx\n", + boot_cpu_data.pdc.versions); + + if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) + printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n", + (boot_cpu_data.pdc.cpuid >> 5) & 127, + boot_cpu_data.pdc.cpuid & 31, + boot_cpu_data.pdc.cpuid); + + if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK) + printk(KERN_INFO "capabilities 0x%lx\n", + boot_cpu_data.pdc.capabilities); + + if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK) + printk(KERN_INFO "model %s\n", + boot_cpu_data.pdc.sys_model_name); + + boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion; + boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion; + + boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion); + boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0]; + boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1]; +} + + +/** + * init_cpu_profiler - enable/setup per cpu profiling hooks. + * @cpunum: The processor instance. + * + * FIXME: doesn't do much yet... + */ +static inline void __init +init_percpu_prof(int cpunum) +{ + cpu_data[cpunum].prof_counter = 1; + cpu_data[cpunum].prof_multiplier = 1; +} + + +/** + * init_per_cpu - Handle individual processor initializations. + * @cpunum: logical processor number. + * + * This function handles initialization for *every* CPU + * in the system: + * + * o Set "default" CPU width for trap handlers + * + * o Enable FP coprocessor + * REVISIT: this could be done in the "code 22" trap handler. + * (frowands idea - that way we know which processes need FP + * registers saved on the interrupt stack.) + * NEWS FLASH: wide kernels need FP coprocessor enabled to handle + * formatted printing of %lx for example (double divides I think) + * + * o Enable CPU profiling hooks. + */ +int __init init_per_cpu(int cpunum) +{ + int ret; + struct pdc_coproc_cfg coproc_cfg; + + set_firmware_width(); + ret = pdc_coproc_cfg(&coproc_cfg); + + if(ret >= 0 && coproc_cfg.ccr_functional) { + mtctl(coproc_cfg.ccr_functional, 10); /* 10 == Coprocessor Control Reg */ + + /* FWIW, FP rev/model is a more accurate way to determine + ** CPU type. CPU rev/model has some ambiguous cases. + */ + cpu_data[cpunum].fp_rev = coproc_cfg.revision; + cpu_data[cpunum].fp_model = coproc_cfg.model; + + printk(KERN_INFO "FP[%d] enabled: Rev %ld Model %ld\n", + cpunum, coproc_cfg.revision, coproc_cfg.model); + + /* + ** store status register to stack (hopefully aligned) + ** and clear the T-bit. + */ + asm volatile ("fstd %fr0,8(%sp)"); + + } else { + printk(KERN_WARNING "WARNING: No FP CoProcessor?!" + " (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n" +#ifdef __LP64__ + "Halting Machine - FP required\n" +#endif + , coproc_cfg.ccr_functional); +#ifdef __LP64__ + mdelay(100); /* previous chars get pushed to console */ + panic("FP CoProc not reported"); +#endif + } + + /* FUTURE: Enable Performance Monitor : ccr bit 0x20 */ + init_percpu_prof(cpunum); + + return ret; +} + +/* + * Display cpu info for all cpu's. + */ +int +show_cpuinfo (struct seq_file *m, void *v) +{ + int n; + + for(n=0; n<boot_cpu_data.cpu_count; n++) { +#ifdef CONFIG_SMP + if (0 == cpu_data[n].hpa) + continue; +#ifdef ENTRY_SYS_CPUS +#error iCOD support wants to show CPU state here +#endif +#endif + seq_printf(m, "processor\t: %d\n" + "cpu family\t: PA-RISC %s\n", + n, boot_cpu_data.family_name); + + seq_printf(m, "cpu\t\t: %s\n", boot_cpu_data.cpu_name ); + + /* cpu MHz */ + seq_printf(m, "cpu MHz\t\t: %d.%06d\n", + boot_cpu_data.cpu_hz / 1000000, + boot_cpu_data.cpu_hz % 1000000 ); + + seq_printf(m, "model\t\t: %s\n" + "model name\t: %s\n", + boot_cpu_data.pdc.sys_model_name, + cpu_data[n].dev ? + cpu_data[n].dev->name : "Unknown" ); + + seq_printf(m, "hversion\t: 0x%08x\n" + "sversion\t: 0x%08x\n", + boot_cpu_data.hversion, + boot_cpu_data.sversion ); + + /* print cachesize info */ + show_cache_info(m); + + seq_printf(m, "bogomips\t: %lu.%02lu\n", + cpu_data[n].loops_per_jiffy / (500000 / HZ), + (cpu_data[n].loops_per_jiffy / (5000 / HZ)) % 100); + + seq_printf(m, "software id\t: %ld\n\n", + boot_cpu_data.pdc.model.sw_id); + } + return 0; +} + +static struct parisc_device_id processor_tbl[] = { + { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID }, + { 0, } +}; + +static struct parisc_driver cpu_driver = { + .name = "CPU", + .id_table = processor_tbl, + .probe = processor_probe +}; + +/** + * processor_init - Processor initalization procedure. + * + * Register this driver. + */ +void __init processor_init(void) +{ + register_parisc_driver(&cpu_driver); +} |