diff options
| author | kato <kato@FreeBSD.org> | 1998-12-05 16:30:55 +0000 |
|---|---|---|
| committer | kato <kato@FreeBSD.org> | 1998-12-05 16:30:55 +0000 |
| commit | 0ebf3be7f1bb2a7a90508f4b5703e771dc3cf264 (patch) | |
| tree | 6d4507fdc69e2342b130cc97dad958155fbbf9cc /sys/amd64 | |
| parent | e625ce3562b4965aa85921ff38423b8a58862c6b (diff) | |
| download | FreeBSD-src-0ebf3be7f1bb2a7a90508f4b5703e771dc3cf264.zip FreeBSD-src-0ebf3be7f1bb2a7a90508f4b5703e771dc3cf264.tar.gz | |
Print out information for write-allocate of AMD CPUs.
Submitted by: Akio Morita <amorita@meadow.scphys.kyoto-u.ac.jp>
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/amd64/identcpu.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/sys/amd64/amd64/identcpu.c b/sys/amd64/amd64/identcpu.c index 98b9edf..9b6d722 100644 --- a/sys/amd64/amd64/identcpu.c +++ b/sys/amd64/amd64/identcpu.c @@ -36,7 +36,7 @@ * SUCH DAMAGE. * * from: Id: machdep.c,v 1.193 1996/06/18 01:22:04 bde Exp - * $Id: identcpu.c,v 1.51 1998/07/11 07:45:28 bde Exp $ + * $Id: identcpu.c,v 1.52 1998/10/06 13:16:23 kato Exp $ */ #include "opt_cpu.h" @@ -839,6 +839,7 @@ static void print_AMD_info(void) { u_int regs[4]; + quad_t amd_whcr; do_cpuid(0x80000000, regs); if (regs[0] >= 0x80000005) { @@ -856,4 +857,22 @@ print_AMD_info(void) printf(", %d lines/tag", (regs[3] >> 8) & 0xff); print_AMD_assoc((regs[3] >> 16) & 0xff); } + switch (cpu_id & 0xFF0) { + case 0x560: /* K6 0.35u */ + case 0x570: /* K6 0.25u */ + case 0x580: /* K6-2 */ + case 0x590: /* K6-3 */ + amd_whcr = rdmsr(0xc0000082); + if (!(amd_whcr & 0x00fe)) { + printf("Write Allocate Disable\n"); + } else { + printf("Write Allocate Enable Limit: %dM bytes\n", + (u_int32_t)(amd_whcr & 0x00fe) * 2); + printf("Write Allocate 15-16M bytes: %s\n", + (amd_whcr & 0x0001) ? "Enable" : "Disable"); + printf("Hardware Write Allocate Control: %s\n", + (amd_whcr & 0x0100) ? "Enable" : "Disable"); + } + break; + } } |
