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464 lines
13 KiB
464 lines
13 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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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 <[email protected]> |
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* Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) |
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* Modifications copyright 2000 Martin K. Petersen <[email protected]> |
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* Modifications copyright 2000 Philipp Rumpf <[email protected]> |
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* Modifications copyright 2001 Ryan Bradetich <[email protected]> |
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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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#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/random.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 __ro_after_init; |
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EXPORT_SYMBOL(boot_cpu_data); |
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#ifdef CONFIG_PA8X00 |
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int _parisc_requires_coherency __ro_after_init; |
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EXPORT_SYMBOL(_parisc_requires_coherency); |
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#endif |
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DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data); |
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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 |
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init_percpu_prof(unsigned long cpunum) |
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{ |
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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 __init 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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struct pdc_pat_cpu_num cpu_info = { }; |
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#ifdef CONFIG_SMP |
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if (num_online_cpus() >= nr_cpu_ids) { |
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printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\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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cpu_info.cpu_num = cpu_info.cpu_loc = cpuid; |
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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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pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL); |
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if (!pa_pdc_cell) |
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panic("couldn't allocate memory for PDC_PAT_CELL!"); |
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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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kfree(pa_pdc_cell); |
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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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pr_info("Logical CPU #%lu is physical cpu #%lu at location " |
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"0x%lx with hpa %pa\n", |
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cpuid, cpu_info.cpu_num, cpu_info.cpu_loc, |
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&dev->hpa.start); |
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#undef USE_PAT_CPUID |
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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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if (cpu_info.cpu_num >= NR_CPUS) { |
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printk(KERN_WARNING "IGNORING CPU at %pa," |
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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->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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p->cpu_num = cpu_info.cpu_num; |
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p->cpu_loc = cpu_info.cpu_loc; |
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store_cpu_topology(cpuid); |
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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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set_cpu_present(cpuid, true); |
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add_cpu(cpuid); |
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} |
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#endif |
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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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unsigned long cr16_seed; |
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char orig_prod_num[64], current_prod_num[64], serial_no[64]; |
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memset(&boot_cpu_data, 0, sizeof(boot_cpu_data)); |
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cr16_seed = get_cycles(); |
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add_device_randomness(&cr16_seed, sizeof(cr16_seed)); |
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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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add_device_randomness(&boot_cpu_data.pdc.model, |
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sizeof(boot_cpu_data.pdc.model)); |
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} |
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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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add_device_randomness(&boot_cpu_data.pdc.versions, |
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sizeof(boot_cpu_data.pdc.versions)); |
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} |
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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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add_device_randomness(&boot_cpu_data.pdc.cpuid, |
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sizeof(boot_cpu_data.pdc.cpuid)); |
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} |
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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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dump_stack_set_arch_desc("%s", 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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#ifdef CONFIG_PA8X00 |
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_parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) || |
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(boot_cpu_data.cpu_type == mako2); |
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#endif |
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if (pdc_model_platform_info(orig_prod_num, current_prod_num, serial_no) == PDC_OK) { |
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printk(KERN_INFO "product %s, original product %s, S/N: %s\n", |
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current_prod_num[0] ? current_prod_num : "n/a", |
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orig_prod_num, serial_no); |
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add_device_randomness(orig_prod_num, strlen(orig_prod_num)); |
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add_device_randomness(current_prod_num, strlen(current_prod_num)); |
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add_device_randomness(serial_no, strlen(serial_no)); |
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} |
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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 __init 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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store_cpu_topology(cpunum); |
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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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if (cpunum == 0) |
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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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#ifdef CONFIG_PARISC_CPU_TOPOLOGY |
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seq_printf(m, "physical id\t: %d\n", |
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topology_physical_package_id(cpu)); |
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seq_printf(m, "siblings\t: %d\n", |
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cpumask_weight(topology_core_cpumask(cpu))); |
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seq_printf(m, "core id\t\t: %d\n", topology_core_id(cpu)); |
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#endif |
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seq_printf(m, "capabilities\t:"); |
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if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32) |
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seq_puts(m, " os32"); |
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if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64) |
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seq_puts(m, " os64"); |
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if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC) |
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seq_puts(m, " iopdir_fdc"); |
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switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) { |
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case PDC_MODEL_NVA_SUPPORTED: |
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seq_puts(m, " nva_supported"); |
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break; |
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case PDC_MODEL_NVA_SLOW: |
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seq_puts(m, " nva_slow"); |
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break; |
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case PDC_MODEL_NVA_UNSUPPORTED: |
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seq_puts(m, " needs_equivalent_aliasing"); |
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break; |
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} |
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seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities); |
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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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loops_per_jiffy / (500000 / HZ), |
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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[] __initconst = { |
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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 __refdata = { |
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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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