/* $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 * Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) * Modifications copyright 2000 Martin K. Petersen * Modifications copyright 2000 Philipp Rumpf * Modifications copyright 2001 Ryan Bradetich * * 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 #include #include #include #include #include #include #include #include #include /* for register_parisc_driver() stuff */ #include #include #include #include #include /* for struct irq_region */ #include struct system_cpuinfo_parisc boot_cpu_data __read_mostly; EXPORT_SYMBOL(boot_cpu_data); struct cpuinfo_parisc cpu_data[NR_CPUS] __read_mostly; /* ** 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.start; /* 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.start); 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.start, 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.start; /* 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; nname : "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[] __read_mostly = { { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID }, { 0, } }; static struct parisc_driver cpu_driver __read_mostly = { .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); }