cpu.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- /* cpu.c: Dinky routines to look for the kind of Sparc cpu
- * we are on.
- *
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/sched.h>
- #include <linux/smp.h>
- #include <asm/asi.h>
- #include <asm/system.h>
- #include <asm/fpumacro.h>
- struct cpu_iu_info {
- short manuf;
- short impl;
- char* cpu_name; /* should be enough I hope... */
- };
- struct cpu_fp_info {
- short manuf;
- short impl;
- char fpu_vers;
- char* fp_name;
- };
- /* In order to get the fpu type correct, you need to take the IDPROM's
- * machine type value into consideration too. I will fix this.
- */
- struct cpu_fp_info linux_sparc_fpu[] = {
- { 0x17, 0x10, 0, "UltraSparc I integrated FPU"},
- { 0x22, 0x10, 0, "UltraSparc II integrated FPU"},
- { 0x17, 0x11, 0, "UltraSparc II integrated FPU"},
- { 0x17, 0x12, 0, "UltraSparc IIi integrated FPU"},
- { 0x17, 0x13, 0, "UltraSparc IIe integrated FPU"},
- { 0x3e, 0x14, 0, "UltraSparc III integrated FPU"},
- };
- #define NSPARCFPU (sizeof(linux_sparc_fpu)/sizeof(struct cpu_fp_info))
- struct cpu_iu_info linux_sparc_chips[] = {
- { 0x17, 0x10, "TI UltraSparc I (SpitFire)"},
- { 0x22, 0x10, "TI UltraSparc II (BlackBird)"},
- { 0x17, 0x11, "TI UltraSparc II (BlackBird)"},
- { 0x17, 0x12, "TI UltraSparc IIi"},
- { 0x17, 0x13, "TI UltraSparc IIe"},
- { 0x3e, 0x14, "TI UltraSparc III (Cheetah)"},
- };
- #define NSPARCCHIPS (sizeof(linux_sparc_chips)/sizeof(struct cpu_iu_info))
- #ifdef CONFIG_SMP
- char *sparc_cpu_type[64] = { "cpu-oops", "cpu-oops1", "cpu-oops2", "cpu-oops3" };
- char *sparc_fpu_type[64] = { "fpu-oops", "fpu-oops1", "fpu-oops2", "fpu-oops3" };
- #else
- char *sparc_cpu_type[64] = { "cpu-oops", };
- char *sparc_fpu_type[64] = { "fpu-oops", };
- #endif
- unsigned int fsr_storage;
- void __init cpu_probe(void)
- {
- int manuf, impl;
- unsigned i, cpuid;
- long ver, fpu_vers;
- long fprs;
-
- cpuid = hard_smp_processor_id();
- fprs = fprs_read ();
- fprs_write (FPRS_FEF);
- __asm__ __volatile__ ("rdpr %%ver, %0; stx %%fsr, [%1]" : "=&r" (ver) : "r" (&fpu_vers));
- fprs_write (fprs);
-
- manuf = ((ver >> 48)&0xffff);
- impl = ((ver >> 32)&0xffff);
- fpu_vers = ((fpu_vers>>17)&0x7);
- for(i = 0; i<NSPARCCHIPS; i++) {
- if(linux_sparc_chips[i].manuf == manuf)
- if(linux_sparc_chips[i].impl == impl) {
- sparc_cpu_type[cpuid] = linux_sparc_chips[i].cpu_name;
- break;
- }
- }
- if(i==NSPARCCHIPS) {
- printk("DEBUG: manuf = 0x%x impl = 0x%xn", manuf,
- impl);
- sparc_cpu_type[cpuid] = "Unknown CPU";
- }
- for(i = 0; i<NSPARCFPU; i++) {
- if(linux_sparc_fpu[i].manuf == manuf && linux_sparc_fpu[i].impl == impl)
- if(linux_sparc_fpu[i].fpu_vers == fpu_vers) {
- sparc_fpu_type[cpuid] = linux_sparc_fpu[i].fp_name;
- break;
- }
- }
- if(i == NSPARCFPU) {
- printk("DEBUG: manuf = 0x%x impl = 0x%x fsr.vers = 0x%xn", manuf, impl,
- (unsigned)fpu_vers);
- sparc_fpu_type[cpuid] = "Unknown FPU";
- }
- }