983a9b60e6
Suggested by: nate - get rid of "magick" values in code and make sysctl's reflecting reality on processor versions which have one or another frequency "forbidden" due to errata. MFC after: 2 weeks
250 lines
6.2 KiB
C
250 lines
6.2 KiB
C
/* $OpenBSD: p4tcc.c,v 1.1 2003/12/20 18:23:18 tedu Exp $ */
|
|
/*
|
|
* Copyright (c) 2003 Ted Unangst
|
|
* Copyright (c) 2004 Maxim Sobolev <sobomax@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
/*
|
|
* Restrict power consumption by using thermal control circuit.
|
|
* This operates independently of speedstep.
|
|
* Found on Pentium 4 and later models (feature TM).
|
|
*
|
|
* References:
|
|
* Intel Developer's manual v.3 #245472-012
|
|
*
|
|
* On some models, the cpu can hang if it's running at a slow speed.
|
|
* Workarounds included below.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_cpu.h"
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/power.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <machine/md_var.h>
|
|
#include <machine/specialreg.h>
|
|
|
|
static u_int p4tcc_percentage;
|
|
static u_int p4tcc_economy;
|
|
static u_int p4tcc_performance;
|
|
static struct sysctl_ctx_list p4tcc_sysctl_ctx;
|
|
static struct sysctl_oid *p4tcc_sysctl_tree;
|
|
|
|
static struct {
|
|
u_short level;
|
|
u_short rlevel;
|
|
u_short reg;
|
|
} tcc[] = {
|
|
{ 88, 100, 0 },
|
|
{ 75, 88, 7 },
|
|
{ 63, 75, 6 },
|
|
{ 50, 63, 5 },
|
|
{ 38, 50, 4 },
|
|
{ 25, 38, 3 },
|
|
{ 13, 25, 2 },
|
|
{ 0, 13, 1 }
|
|
};
|
|
|
|
#define TCC_LEVELS sizeof(tcc) / sizeof(tcc[0])
|
|
|
|
static u_short
|
|
p4tcc_getperf(void)
|
|
{
|
|
u_int64_t msreg;
|
|
int i;
|
|
|
|
msreg = rdmsr(MSR_THERM_CONTROL);
|
|
msreg = (msreg >> 1) & 0x07;
|
|
for (i = 0; i < TCC_LEVELS; i++) {
|
|
if (msreg == tcc[i].reg)
|
|
break;
|
|
}
|
|
|
|
return (tcc[i].rlevel);
|
|
}
|
|
|
|
static void
|
|
p4tcc_setperf(u_int percentage)
|
|
{
|
|
int i;
|
|
u_int64_t msreg;
|
|
|
|
if (percentage > tcc[0].rlevel)
|
|
percentage = tcc[0].rlevel;
|
|
for (i = 0; i < TCC_LEVELS - 1; i++) {
|
|
if (percentage > tcc[i].level)
|
|
break;
|
|
}
|
|
|
|
msreg = rdmsr(MSR_THERM_CONTROL);
|
|
msreg &= ~0x1e; /* bit 0 reserved */
|
|
if (tcc[i].reg != 0)
|
|
msreg |= tcc[i].reg << 1 | 1 << 4;
|
|
wrmsr(MSR_THERM_CONTROL, msreg);
|
|
}
|
|
|
|
static int
|
|
p4tcc_perf_sysctl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
u_int percentage;
|
|
int error;
|
|
|
|
p4tcc_percentage = p4tcc_getperf();
|
|
percentage = p4tcc_percentage;
|
|
error = sysctl_handle_int(oidp, &percentage, 0, req);
|
|
if (error || !req->newptr) {
|
|
return (error);
|
|
}
|
|
if (p4tcc_percentage != percentage) {
|
|
p4tcc_setperf(percentage);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
p4tcc_power_profile(void *arg)
|
|
{
|
|
int state;
|
|
u_int new;
|
|
|
|
state = power_profile_get_state();
|
|
if (state != POWER_PROFILE_PERFORMANCE &&
|
|
state != POWER_PROFILE_ECONOMY) {
|
|
return;
|
|
}
|
|
|
|
switch (state) {
|
|
case POWER_PROFILE_PERFORMANCE:
|
|
new = p4tcc_performance;
|
|
break;
|
|
case POWER_PROFILE_ECONOMY:
|
|
new = p4tcc_economy;
|
|
break;
|
|
default:
|
|
new = p4tcc_getperf();
|
|
break;
|
|
}
|
|
|
|
if (p4tcc_getperf() != new) {
|
|
p4tcc_setperf(new);
|
|
}
|
|
}
|
|
|
|
static int
|
|
p4tcc_profile_sysctl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
u_int32_t *argp;
|
|
u_int32_t arg;
|
|
int error;
|
|
|
|
argp = (u_int32_t *)oidp->oid_arg1;
|
|
arg = *argp;
|
|
error = sysctl_handle_int(oidp, &arg, 0, req);
|
|
|
|
/* error or no new value */
|
|
if ((error != 0) || (req->newptr == NULL))
|
|
return (error);
|
|
|
|
/* range check */
|
|
if (arg > tcc[0].rlevel)
|
|
arg = tcc[0].rlevel;
|
|
|
|
/* set new value and possibly switch */
|
|
*argp = arg;
|
|
|
|
p4tcc_power_profile(NULL);
|
|
|
|
*argp = p4tcc_getperf();
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
setup_p4tcc(void *dummy __unused)
|
|
{
|
|
|
|
if ((cpu_feature & (CPUID_ACPI | CPUID_TM)) !=
|
|
(CPUID_ACPI | CPUID_TM))
|
|
return;
|
|
|
|
switch (cpu_id & 0xf) {
|
|
case 0x22: /* errata O50 P44 and Z21 */
|
|
case 0x24:
|
|
case 0x25:
|
|
case 0x27:
|
|
case 0x29:
|
|
/* hang with 12.5 */
|
|
tcc[TCC_LEVELS - 1] = tcc[TCC_LEVELS - 2];
|
|
break;
|
|
case 0x07: /* errata N44 and P18 */
|
|
case 0x0a:
|
|
case 0x12:
|
|
case 0x13:
|
|
/* hang at 12.5 and 25 */
|
|
tcc[TCC_LEVELS - 1] = tcc[TCC_LEVELS - 2] = tcc[TCC_LEVELS - 3];
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
p4tcc_economy = tcc[TCC_LEVELS - 1].rlevel;
|
|
p4tcc_performance = tcc[0].rlevel;
|
|
|
|
p4tcc_percentage = p4tcc_getperf();
|
|
printf("Pentium 4 TCC support enabled, current performance %u%%\n",
|
|
p4tcc_percentage);
|
|
|
|
sysctl_ctx_init(&p4tcc_sysctl_ctx);
|
|
p4tcc_sysctl_tree = SYSCTL_ADD_NODE(&p4tcc_sysctl_ctx,
|
|
SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, "p4tcc", CTLFLAG_RD, 0,
|
|
"Pentium 4 Ternal Control Circuitry support");
|
|
SYSCTL_ADD_PROC(&p4tcc_sysctl_ctx,
|
|
SYSCTL_CHILDREN(p4tcc_sysctl_tree), OID_AUTO,
|
|
"cpuperf", CTLTYPE_INT | CTLFLAG_RW,
|
|
&p4tcc_percentage, 0, p4tcc_perf_sysctl, "I",
|
|
"CPU performance in % of maximum");
|
|
SYSCTL_ADD_PROC(&p4tcc_sysctl_ctx,
|
|
SYSCTL_CHILDREN(p4tcc_sysctl_tree), OID_AUTO,
|
|
"cpuperf_performance", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_RW,
|
|
&p4tcc_performance, 0, p4tcc_profile_sysctl, "I",
|
|
"CPU performance in % of maximum in Performance mode");
|
|
SYSCTL_ADD_PROC(&p4tcc_sysctl_ctx,
|
|
SYSCTL_CHILDREN(p4tcc_sysctl_tree), OID_AUTO,
|
|
"cpuperf_economy", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_RW,
|
|
&p4tcc_economy, 0, p4tcc_profile_sysctl, "I",
|
|
"CPU performance in % of maximum in Economy mode");
|
|
|
|
/* register performance profile change handler */
|
|
EVENTHANDLER_REGISTER(power_profile_change, p4tcc_power_profile, NULL, 0);
|
|
}
|
|
SYSINIT(setup_p4tcc, SI_SUB_CPU, SI_ORDER_ANY, setup_p4tcc, NULL);
|