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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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struct system_cpuinfo_parisc boot_cpu_data __ro_after_init;EXPORT_SYMBOL(boot_cpu_data);#ifdef CONFIG_PA8X00int _parisc_requires_coherency __ro_after_init;EXPORT_SYMBOL(_parisc_requires_coherency);#endif
DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data);
/*** 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 CPUs 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).*/
/** * init_percpu_prof - enable/setup per cpu profiling hooks. * @cpunum: The processor instance. * * FIXME: doesn't do much yet... */static voidinit_percpu_prof(unsigned long cpunum){}
/** * 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; struct pdc_pat_cpu_num cpu_info = { };
#ifdef CONFIG_SMP if (num_online_cpus() >= nr_cpu_ids) { printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n"); return 1; }#else 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 */ cpu_info.cpu_num = cpu_info.cpu_loc = cpuid;
#ifdef CONFIG_64BIT if (is_pdc_pat()) { ulong status; unsigned long bytecnt; pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
pa_pdc_cell = kmalloc_obj(*pa_pdc_cell); if (!pa_pdc_cell) panic("couldn't allocate memory for PDC_PAT_CELL!");
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 */
kfree(pa_pdc_cell);
/* get the cpu number */ status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start); BUG_ON(PDC_OK != status);
pr_info("Logical CPU #%lu is physical cpu #%lu at location " "0x%lx with hpa %pa\n", cpuid, cpu_info.cpu_num, cpu_info.cpu_loc, &dev->hpa.start);
#undef USE_PAT_CPUID#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). */ if (cpu_info.cpu_num >= NR_CPUS) { printk(KERN_WARNING "IGNORING CPU at %pa," " 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 = &per_cpu(cpu_data, cpuid); boot_cpu_data.cpu_count++;
/* initialize counters - CPU 0 gets it_value set in time_init() */ if (cpuid) memset(p, 0, sizeof(struct cpuinfo_parisc));
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 */ p->cpu_num = cpu_info.cpu_num; p->cpu_loc = cpu_info.cpu_loc;
store_cpu_topology(cpuid);
#ifdef CONFIG_SMP /* ** FIXME: review if any other initialization is clobbered ** for boot_cpu by the above memset(). */ init_percpu_prof(cpuid);#endif
/* ** CONFIG_SMP: init_smp_config() will attempt to get CPUs 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) { set_cpu_present(cpuid, true); add_cpu(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){ unsigned long cr16_seed; char orig_prod_num[64], current_prod_num[64], serial_no[64];
memset(&boot_cpu_data, 0, sizeof(boot_cpu_data));
cr16_seed = get_cycles(); add_device_randomness(&cr16_seed, sizeof(cr16_seed));
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) { pr_info("model 0x%04lx 0x%04lx 0x%04lx 0x%04lx 0x%04lx " "0x%04lx 0x%04lx 0x%04lx 0x%04lx 0x%04lx\n", p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9]);
add_device_randomness(&boot_cpu_data.pdc.model, sizeof(boot_cpu_data.pdc.model)); }#undef p
if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK) { pr_info("vers 0x%04lx\n", boot_cpu_data.pdc.versions);
add_device_randomness(&boot_cpu_data.pdc.versions, sizeof(boot_cpu_data.pdc.versions)); }
if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) { pr_info("CPUID vers %ld rev %ld (0x%04lx)\n", (boot_cpu_data.pdc.cpuid >> 5) & 127, boot_cpu_data.pdc.cpuid & 31, boot_cpu_data.pdc.cpuid);
add_device_randomness(&boot_cpu_data.pdc.cpuid, sizeof(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(OS_ID_HPUX, boot_cpu_data.pdc.sys_model_name) == PDC_OK) pr_info("HP-UX model name: %s\n", boot_cpu_data.pdc.sys_model_name);
serial_no[0] = 0; if (pdc_model_sysmodel(OS_ID_MPEXL, serial_no) == PDC_OK && serial_no[0]) pr_info("MPE/iX model name: %s\n", serial_no);
dump_stack_set_arch_desc("%s", 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];
#ifdef CONFIG_PA8X00 _parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) || (boot_cpu_data.cpu_type == mako2);#endif
if (pdc_model_platform_info(orig_prod_num, current_prod_num, serial_no) == PDC_OK) { printk(KERN_INFO "product %s, original product %s, S/N: %s\n", current_prod_num[0] ? current_prod_num : "n/a", orig_prod_num, serial_no); add_device_randomness(orig_prod_num, strlen(orig_prod_num)); add_device_randomness(current_prod_num, strlen(current_prod_num)); add_device_randomness(serial_no, strlen(serial_no)); }}
/** * 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_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. */ per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision; per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
if (cpunum == 0) 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 CONFIG_64BIT "Halting Machine - FP required\n"#endif , coproc_cfg.ccr_functional);#ifdef CONFIG_64BIT 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);
btlb_init_per_cpu();
return ret;}
/* * Display CPU info for all CPUs. */intshow_cpuinfo (struct seq_file *m, void *v){ unsigned long cpu; char cpu_name[60], *p;
/* strip PA path from CPU name to not confuse lscpu */ strscpy(cpu_name, per_cpu(cpu_data, 0).dev->name, sizeof(cpu_name)); p = strrchr(cpu_name, '['); if (p) *(--p) = 0;
for_each_online_cpu(cpu) {#ifdef CONFIG_SMP const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
if (0 == cpuinfo->hpa) continue;#endif seq_printf(m, "processor\t: %lu\n" "cpu family\t: PA-RISC %s\n", cpu, 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 );
#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY seq_printf(m, "physical id\t: %d\n", topology_physical_package_id(cpu)); seq_printf(m, "siblings\t: %d\n", cpumask_weight(topology_core_cpumask(cpu))); seq_printf(m, "core id\t\t: %d\n", topology_core_id(cpu));#endif
seq_printf(m, "capabilities\t:"); if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32) seq_puts(m, " os32"); if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64) seq_puts(m, " os64"); if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC) seq_puts(m, " iopdir_fdc"); switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) { case PDC_MODEL_NVA_SUPPORTED: seq_puts(m, " nva_supported"); break; case PDC_MODEL_NVA_SLOW: seq_puts(m, " nva_slow"); break; case PDC_MODEL_NVA_UNSUPPORTED: seq_puts(m, " needs_equivalent_aliasing"); break; } seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities);
seq_printf(m, "model\t\t: %s - %s\n", boot_cpu_data.pdc.sys_model_name, cpu_name);
seq_printf(m, "hversion\t: 0x%04x\n" "sversion\t: 0x%04x\n", boot_cpu_data.hversion, boot_cpu_data.sversion );
/* print cachesize info */ show_cache_info(m);
seq_printf(m, "bogomips\t: %lu.%02lu\n", loops_per_jiffy / (500000 / HZ), 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 const struct parisc_device_id processor_tbl[] __initconst = { { HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID }, { 0, }};
static struct parisc_driver cpu_driver __refdata = { .name = "CPU", .id_table = processor_tbl, .probe = processor_probe};
/** * processor_init - Processor initialization procedure. * * Register this driver. */void __init processor_init(void){ reset_cpu_topology(); register_parisc_driver(&cpu_driver);}