From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/sparc64/kernel/cpu.c | 124 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 124 insertions(+) create mode 100644 arch/sparc64/kernel/cpu.c (limited to 'arch/sparc64/kernel/cpu.c') diff --git a/arch/sparc64/kernel/cpu.c b/arch/sparc64/kernel/cpu.c new file mode 100644 index 00000000000..48756958116 --- /dev/null +++ b/arch/sparc64/kernel/cpu.c @@ -0,0 +1,124 @@ +/* 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 +#include +#include +#include +#include +#include +#include +#include +#include + +DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 }; + +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; +}; + +struct cpu_fp_info linux_sparc_fpu[] = { + { 0x17, 0x10, 0, "UltraSparc I integrated FPU"}, + { 0x22, 0x10, 0, "UltraSparc I 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"}, + { 0x3e, 0x15, 0, "UltraSparc III+ integrated FPU"}, + { 0x3e, 0x16, 0, "UltraSparc IIIi integrated FPU"}, + { 0x3e, 0x18, 0, "UltraSparc IV 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 I (SpitFire)"}, + { 0x17, 0x11, "TI UltraSparc II (BlackBird)"}, + { 0x17, 0x12, "TI UltraSparc IIi (Sabre)"}, + { 0x17, 0x13, "TI UltraSparc IIe (Hummingbird)"}, + { 0x3e, 0x14, "TI UltraSparc III (Cheetah)"}, + { 0x3e, 0x15, "TI UltraSparc III+ (Cheetah+)"}, + { 0x3e, 0x16, "TI UltraSparc IIIi (Jalapeno)"}, + { 0x3e, 0x18, "TI UltraSparc IV (Jaguar)"}, +}; + +#define NSPARCCHIPS (sizeof(linux_sparc_chips)/sizeof(struct cpu_iu_info)) + +char *sparc_cpu_type = "cpu-oops"; +char *sparc_fpu_type = "fpu-oops"; + +unsigned int fsr_storage; + +void __init cpu_probe(void) +{ + unsigned long ver, fpu_vers, manuf, impl, fprs; + int i; + + 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); + +retry: + for (i = 0; i < NSPARCCHIPS; i++) { + if (linux_sparc_chips[i].manuf == manuf) { + if (linux_sparc_chips[i].impl == impl) { + sparc_cpu_type = + linux_sparc_chips[i].cpu_name; + break; + } + } + } + + if (i == NSPARCCHIPS) { + /* Maybe it is a cheetah+ derivative, report it as cheetah+ + * in that case until we learn the real names. + */ + if (manuf == 0x3e && + impl > 0x15) { + impl = 0x15; + goto retry; + } else { + printk("DEBUG: manuf[%lx] impl[%lx]\n", + manuf, impl); + } + sparc_cpu_type = "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 = + linux_sparc_fpu[i].fp_name; + break; + } + } + } + + if (i == NSPARCFPU) { + printk("DEBUG: manuf[%lx] impl[%lx] fsr.vers[%lx]\n", + manuf, impl, fpu_vers); + sparc_fpu_type = "Unknown FPU"; + } +} -- cgit v1.2.3