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Print out information for write-allocate of AMD CPUs.

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Submitted by:	Akio Morita <amorita@meadow.scphys.kyoto-u.ac.jp>
This commit is contained in:
kato 1998-12-05 16:30:55 +00:00
parent e625ce3562
commit 0ebf3be7f1
2 changed files with 40 additions and 2 deletions
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21
sys/amd64/amd64/identcpu.c
View File

@ -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;
}
}

21
sys/i386/i386/identcpu.c
View File

@ -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;
}
}