diff options
Diffstat (limited to 'src/cpu/p5/cpuid.c')
| -rw-r--r-- | src/cpu/p5/cpuid.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/src/cpu/p5/cpuid.c b/src/cpu/p5/cpuid.c new file mode 100644 index 0000000000..d90cc2c124 --- /dev/null +++ b/src/cpu/p5/cpuid.c @@ -0,0 +1,222 @@ +#ifndef lint +static char rcsid[] = "$Id$"; +#endif + +#include <console/console.h> +#include <cpu/p5/cpuid.h> +#ifdef i586 +#include <cpu/p6/msr.h> +#endif + + +int mtrr_check(void) +{ +#ifdef i686 + /* Only Pentium Pro and later have MTRR */ + unsigned long low, high; + + printk_debug("\nMTRR check\n"); + + rdmsr(0x2ff, low, high); + low = low >> 10; + + printk_debug("Fixed MTRRs : "); + if (low & 0x01) + printk_debug("Enabled\n"); + else + printk_debug("Disabled\n"); + + printk_debug("Variable MTRRs: "); + if (low & 0x02) + printk_debug("Enabled\n"); + else + printk_debug("Disabled\n"); + + printk_debug("\n"); + + post_code(0x93); + return ((int) low); +#else /* !i686 */ + return 0; +#endif /* i686 */ +} + +void display_cpuid(void) +{ + int op, eax, ebx, ecx, edx; + int max_op; + + max_op = 0; + + printk_debug("\n"); + + for (op = 0; op <= max_op; op++) { + cpuid(op, &eax, &ebx, &ecx, &edx); + + if (0 == op) { + max_op = eax; + printk_debug("Max cpuid index : %d\n", eax); + printk_debug("Vendor ID : " + "%c%c%c%c%c%c%c%c%c%c%c%c\n", + ebx, ebx >> 8, ebx >> 16, ebx >> 24, edx, + edx >> 8, edx >> 16, edx >> 24, ecx, ecx >> 8, + ecx >> 16, ecx >> 24); + } else if (1 == op) { + printk_debug("Processor Type : 0x%02x\n", + (eax >> 12) & 0x03); + printk_debug("Processor Family : 0x%02x\n", + (eax >> 8) & 0x0f); + printk_debug("Processor Model : 0x%02x\n", + (eax >> 4) & 0x0f); + printk_debug("Processor Mask : 0x%02x\n", + (ecx >> 0) & 0x0f); + printk_debug("Processor Stepping : 0x%02x\n", + (eax >> 0) & 0x0f); + printk_debug("Feature flags : 0x%08x\n", edx); + } else if (2 == op) { + int desc[4]; + int ii; + int _desc; + + printk_debug("\n"); + + printk_debug("Cache/TLB descriptor values: %d " + "reads required\n", eax & 0xff); + + desc[0] = eax; + desc[1] = ebx; + desc[2] = ecx; + desc[3] = edx; + + for (ii = 1; ii < 16; ii++) { + if (desc[ii >> 2] & 0x80000000) { + printk_debug("reserved descriptor\n"); + continue; + } + + _desc = + ((desc[ii >> 2]) >> ((ii & 0x3) << 3)) + & 0xff; + printk_debug("Desc 0x%02x : ", _desc); + + switch (_desc) { + case 0x00: + printk_debug("null\n"); + break; + + case 0x01: + printk_debug("Instr TLB: " + "4KB pages, " + "4-way set assoc, " + "32 entries\n"); + break; + + case 0x02: + printk_debug("Instr TLB: " + "4MB pages, " + "fully assoc, " "2 entries\n"); + break; + + case 0x03: + printk_debug("Data TLB: " + "4KB pages, " + "4-way set assoc, " + "64 entries\n"); + break; + + case 0x04: + printk_debug("Data TLB: " + "4MB pages, " + "4-way set assoc, " + "8 entries\n"); + break; + + case 0x06: + printk_debug("Inst cache: " + "8K bytes, " + "4-way set assoc, " + "32 byte line size\n"); + break; + + case 0x08: + printk_debug("Inst cache: " + "16K bytes, " + "4-way set assoc, " + "32 byte line size\n"); + break; + + case 0x0a: + printk_debug("Data cache: " + "8K bytes, " + "2-way set assoc, " + "32 byte line size\n"); + break; + + case 0x0c: + printk_debug("Data cache: " + "16K bytes, " + "2-way or 4-way set assoc, " + "32 byte line size\n"); + break; + + case 0x40: + printk_debug("No L2 cache\n"); + break; + + case 0x41: + printk_debug("L2 Unified cache: " + "128K bytes, " + "4-way set assoc, " + "32 byte line size\n"); + break; + + case 0x42: + printk_debug("L2 Unified cache: " + "256K bytes, " + "4-way set assoc, " + "32 byte line size\n"); + break; + + case 0x43: + printk_debug("L2 Unified cache: " + "512K bytes, " + "4-way set assoc, " + "32 byte line size\n"); + break; + + case 0x44: + printk_debug("L2 Unified cache: " + "1M byte, " + "4-way set assoc, " + "32 byte line size\n"); + break; + + case 0x45: + printk_debug("L2 Unified cache: " + "2M byte, " + "4-way set assoc, " + "32 byte line size\n"); + break; + + case 0x82: + printk_debug("L2 Unified cache: " + "256K bytes, " + "8-way set assoc, " + "32 byte line size\n"); + break; + + default: + printk_debug("UNKNOWN\n"); + } + } + printk_debug("\n"); + } else { + printk_debug("op: 0x%02x eax:0x%08x " + "ebx:0x%08x ecx:0x%08x edx:0x%08x\n", + op, eax, ebx, ecx, edx); + } + } + + printk_debug("\n"); + post_code(0x92); +} |