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If an EST frequency table isn't found, fake one up by interpolating 

values from the high/low voltages and frequencies.  Replaces the old
method of using the lower and upper frequencies only.
This commit is contained in:
simonb 2007-08-06 03:38:49 +00:00
parent 0e5ca3d77c
commit 3696d5ed67
1 changed files with 61 additions and 18 deletions
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79
sys/arch/x86/x86/est.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: est.c,v 1.2 2007/07/01 20:12:35 xtraeme Exp $ */
/* $NetBSD: est.c,v 1.3 2007/08/06 03:38:49 simonb Exp $ */
/*
* Copyright (c) 2003 Michael Eriksson.
* All rights reserved.
@ -86,7 +86,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: est.c,v 1.2 2007/07/01 20:12:35 xtraeme Exp $");
__KERNEL_RCSID(0, "$NetBSD: est.c,v 1.3 2007/08/06 03:38:49 simonb Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -999,8 +999,8 @@ static const struct fqlist est_cpus[] = {
#define MSR2MHZ(msr, bus) ((MSR2FREQINC((msr)) * (bus) + 50) / 100)
#define MSR2MV(msr) (MSR2VOLTINC(msr) * 16 + 700)
static const struct fqlist *est_fqlist; /* not NULL if functional */
static uint16_t fake_table[3]; /* guessed est_cpu table */
static const struct fqlist *est_fqlist; /* not NULL if functional */
static uint16_t *fake_table; /* guessed est_cpu table */
static struct fqlist fake_fqlist;
static int est_node_target, est_node_current;
static const char est_desc[] = "Enhanced SpeedStep";
@ -1159,6 +1159,9 @@ est_init_main(int vendor)
#endif
if (est_fqlist == NULL) {
int j, tablesize, freq, volt;
int minfreq, minvolt, maxfreq, maxvolt, freqinc, voltinc;
aprint_normal("%s: unknown Enhanced SpeedStep CPU.\n",
cpuname);
@ -1168,24 +1171,64 @@ est_init_main(int vendor)
*/
if (idhi == idlo)
return;
#ifdef EST_DEBUG
printf("%s: bus_clock = %d\n", __FUNCTION__, bus_clock);
printf("%s: idlo = 0x%x\n", __FUNCTION__, idlo);
printf("%s: lo %4d mV, %4d MHz\n", __FUNCTION__,
MSR2MV(idlo), MSR2MHZ(idlo, bus_clock));
printf("%s: raw %4d , %4d \n", __FUNCTION__,
(idlo & 0xff), ((idlo >> 8) & 0xff));
printf("%s: idhi = 0x%x\n", __FUNCTION__, idhi);
printf("%s: hi %4d mV, %4d MHz\n", __FUNCTION__,
MSR2MV(idhi), MSR2MHZ(idhi, bus_clock));
printf("%s: raw %4d , %4d \n", __FUNCTION__,
(idhi & 0xff), ((idhi >> 8) & 0xff));
printf("%s: cur = 0x%x\n", __FUNCTION__, cur);
#endif
/*
* Generate a fake table with the power states we know.
* Generate a fake table with the power states we know,
* interpolating the voltages and frequencies between the
* high and low values. The (milli)voltages are always
* rounded up when computing the table.
*/
fake_table[0] = idhi;
if (cur == idhi || cur == idlo) {
aprint_normal("%s: using only highest and lowest "
"power states.\n", cpuname);
minfreq = MSR2FREQINC(idlo);
maxfreq = MSR2FREQINC(idhi);
minvolt = MSR2VOLTINC(idlo);
maxvolt = MSR2VOLTINC(idhi);
freqinc = maxfreq - minfreq;
voltinc = maxvolt - minvolt;
if (freqinc < voltinc) {
tablesize = maxfreq - minfreq + 1;
voltinc = voltinc * 100 / freqinc - 1;
freqinc = 100;
} else {
tablesize = maxvolt - minvolt + 1;
freqinc = freqinc * 100 / voltinc - 1;
voltinc = 100;
}
fake_table[1] = idlo;
fake_fqlist.n = 2;
} else {
aprint_normal("%s: using only highest, current "
"and lowest power states.\n", cpuname);
fake_table = malloc(tablesize * sizeof(uint16_t), M_DEVBUF,
M_WAITOK);
fake_fqlist.n = tablesize;
fake_table[1] = cur;
fake_table[2] = idlo;
fake_fqlist.n = 3;
}
/* The frequency/voltage table is highest frequency first */
freq = maxfreq * 100;
volt = maxvolt * 100;
for (j = 0; j < tablesize; j++) {
fake_table[j] = (((freq + 99) / 100) << 8) +
(volt + 99) / 100;
#ifdef EST_DEBUG
printf("%s: fake entry %d: %4d mV, %4d MHz "
"MSR*100 mV = %4d freq = %4d\n",
__FUNCTION__, j, MSR2MV(fake_table[j]),
MSR2MHZ(fake_table[j], bus_clock),
freq, volt);
#endif /* EST_DEBUG */
freq -= freqinc;
volt -= voltinc;
}
fake_fqlist.vendor = vendor;
fake_fqlist.table = fake_table;
est_fqlist = &fake_fqlist;