167 lines
3.6 KiB
C
167 lines
3.6 KiB
C
/* cpu.c: Dinky routines to look for the kind of Sparc cpu
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* we are on.
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*
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* Copyright (C) 1996, 2007, 2008 David S. Miller (davem@davemloft.net)
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <asm/asi.h>
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#include <asm/system.h>
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#include <asm/fpumacro.h>
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#include <asm/cpudata.h>
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#include <asm/spitfire.h>
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#include <asm/oplib.h>
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#include "entry.h"
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DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 };
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struct cpu_chip_info {
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unsigned short manuf;
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unsigned short impl;
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const char *cpu_name;
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const char *fp_name;
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};
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static const struct cpu_chip_info cpu_chips[] = {
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{
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.manuf = 0x17,
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.impl = 0x10,
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.cpu_name = "TI UltraSparc I (SpitFire)",
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.fp_name = "UltraSparc I integrated FPU",
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},
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{
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.manuf = 0x22,
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.impl = 0x10,
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.cpu_name = "TI UltraSparc I (SpitFire)",
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.fp_name = "UltraSparc I integrated FPU",
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},
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{
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.manuf = 0x17,
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.impl = 0x11,
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.cpu_name = "TI UltraSparc II (BlackBird)",
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.fp_name = "UltraSparc II integrated FPU",
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},
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{
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.manuf = 0x17,
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.impl = 0x12,
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.cpu_name = "TI UltraSparc IIi (Sabre)",
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.fp_name = "UltraSparc IIi integrated FPU",
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},
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{
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.manuf = 0x17,
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.impl = 0x13,
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.cpu_name = "TI UltraSparc IIe (Hummingbird)",
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.fp_name = "UltraSparc IIe integrated FPU",
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},
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{
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.manuf = 0x3e,
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.impl = 0x14,
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.cpu_name = "TI UltraSparc III (Cheetah)",
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.fp_name = "UltraSparc III integrated FPU",
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},
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{
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.manuf = 0x3e,
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.impl = 0x15,
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.cpu_name = "TI UltraSparc III+ (Cheetah+)",
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.fp_name = "UltraSparc III+ integrated FPU",
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},
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{
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.manuf = 0x3e,
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.impl = 0x16,
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.cpu_name = "TI UltraSparc IIIi (Jalapeno)",
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.fp_name = "UltraSparc IIIi integrated FPU",
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},
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{
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.manuf = 0x3e,
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.impl = 0x18,
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.cpu_name = "TI UltraSparc IV (Jaguar)",
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.fp_name = "UltraSparc IV integrated FPU",
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},
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{
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.manuf = 0x3e,
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.impl = 0x19,
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.cpu_name = "TI UltraSparc IV+ (Panther)",
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.fp_name = "UltraSparc IV+ integrated FPU",
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},
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{
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.manuf = 0x3e,
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.impl = 0x22,
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.cpu_name = "TI UltraSparc IIIi+ (Serrano)",
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.fp_name = "UltraSparc IIIi+ integrated FPU",
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},
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};
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#define NSPARCCHIPS ARRAY_SIZE(linux_sparc_chips)
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const char *sparc_cpu_type;
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const char *sparc_fpu_type;
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static void __init sun4v_cpu_probe(void)
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{
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switch (sun4v_chip_type) {
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case SUN4V_CHIP_NIAGARA1:
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sparc_cpu_type = "UltraSparc T1 (Niagara)";
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sparc_fpu_type = "UltraSparc T1 integrated FPU";
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break;
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case SUN4V_CHIP_NIAGARA2:
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sparc_cpu_type = "UltraSparc T2 (Niagara2)";
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sparc_fpu_type = "UltraSparc T2 integrated FPU";
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break;
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default:
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printk(KERN_WARNING "CPU: Unknown sun4v cpu type [%s]\n",
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prom_cpu_compatible);
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sparc_cpu_type = "Unknown SUN4V CPU";
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sparc_fpu_type = "Unknown SUN4V FPU";
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break;
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}
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}
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static const struct cpu_chip_info * __init find_cpu_chip(unsigned short manuf,
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unsigned short impl)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(cpu_chips); i++) {
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const struct cpu_chip_info *p = &cpu_chips[i];
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if (p->manuf == manuf && p->impl == impl)
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return p;
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}
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return NULL;
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}
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static int __init cpu_type_probe(void)
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{
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if (tlb_type == hypervisor) {
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sun4v_cpu_probe();
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} else {
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unsigned long ver, manuf, impl;
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const struct cpu_chip_info *p;
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__asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver));
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manuf = ((ver >> 48) & 0xffff);
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impl = ((ver >> 32) & 0xffff);
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p = find_cpu_chip(manuf, impl);
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if (p) {
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sparc_cpu_type = p->cpu_name;
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sparc_fpu_type = p->fp_name;
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} else {
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printk(KERN_ERR "CPU: Unknown chip, manuf[%lx] impl[%lx]\n",
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manuf, impl);
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sparc_cpu_type = "Unknown CPU";
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sparc_fpu_type = "Unknown FPU";
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}
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}
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return 0;
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}
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arch_initcall(cpu_type_probe);
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