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Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq

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* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Correct revision mask for powernow-k8
  [CPUFREQ] powernow-k7: fix MHz rounding issue with perflib
  [CPUFREQ] Support rev H AMD64s in powernow-k8
This commit is contained in:
Linus Torvalds 2007-05-15 12:10:00 -07:00
commit 1ca9bc4f2a
3 changed files with 31 additions and 11 deletions
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36
arch/i386/kernel/cpu/cpufreq/powernow-k7.c
View File

@ -341,15 +341,17 @@ static int powernow_acpi_init(void)
pc.val = (unsigned long) acpi_processor_perf->states[0].control;
for (i = 0; i < number_scales; i++) {
u8 fid, vid;
unsigned int speed;
struct acpi_processor_px *state =
&acpi_processor_perf->states[i];
unsigned int speed, speed_mhz;
pc.val = (unsigned long) acpi_processor_perf->states[i].control;
pc.val = (unsigned long) state->control;
dprintk ("acpi: P%d: %d MHz %d mW %d uS control %08x SGTC %d\n",
i,
(u32) acpi_processor_perf->states[i].core_frequency,
(u32) acpi_processor_perf->states[i].power,
(u32) acpi_processor_perf->states[i].transition_latency,
(u32) acpi_processor_perf->states[i].control,
(u32) state->core_frequency,
(u32) state->power,
(u32) state->transition_latency,
(u32) state->control,
pc.bits.sgtc);
vid = pc.bits.vid;
@ -360,6 +362,18 @@ static int powernow_acpi_init(void)
powernow_table[i].index |= (vid << 8); /* upper 8 bits */
speed = powernow_table[i].frequency;
speed_mhz = speed / 1000;
/* processor_perflib will multiply the MHz value by 1000 to
* get a KHz value (e.g. 1266000). However, powernow-k7 works
* with true KHz values (e.g. 1266768). To ensure that all
* powernow frequencies are available, we must ensure that
* ACPI doesn't restrict them, so we round up the MHz value
* to ensure that perflib's computed KHz value is greater than
* or equal to powernow's KHz value.
*/
if (speed % 1000 > 0)
speed_mhz++;
if ((fid_codes[fid] % 10)==5) {
if (have_a0 == 1)
@ -368,10 +382,16 @@ static int powernow_acpi_init(void)
dprintk (" FID: 0x%x (%d.%dx [%dMHz]) "
"VID: 0x%x (%d.%03dV)\n", fid, fid_codes[fid] / 10,
fid_codes[fid] % 10, speed/1000, vid,
fid_codes[fid] % 10, speed_mhz, vid,
mobile_vid_table[vid]/1000,
mobile_vid_table[vid]%1000);
if (state->core_frequency != speed_mhz) {
state->core_frequency = speed_mhz;
dprintk(" Corrected ACPI frequency to %d\n",
speed_mhz);
}
if (latency < pc.bits.sgtc)
latency = pc.bits.sgtc;
@ -602,7 +622,7 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
result = powernow_acpi_init();
if (result) {
printk (KERN_INFO PFX "ACPI and legacy methods failed\n");
printk (KERN_INFO PFX "See http://www.codemonkey.org.uk/projects/cpufreq/powernow-k7.shtml\n");
printk (KERN_INFO PFX "See http://www.codemonkey.org.uk/projects/cpufreq/powernow-k7.html\n");
}
} else {
/* SGTC use the bus clock as timer */

2
arch/i386/kernel/cpu/cpufreq/powernow-k8.c
View File

@ -521,7 +521,7 @@ static int check_supported_cpu(unsigned int cpu)
if ((eax & CPUID_XFAM) == CPUID_XFAM_K8) {
if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) ||
((eax & CPUID_XMOD) > CPUID_XMOD_REV_G)) {
((eax & CPUID_XMOD) > CPUID_XMOD_REV_MASK)) {
printk(KERN_INFO PFX "Processor cpuid %x not supported\n", eax);
goto out;
}

2
arch/i386/kernel/cpu/cpufreq/powernow-k8.h
View File

@ -46,7 +46,7 @@ struct powernow_k8_data {
#define CPUID_XFAM 0x0ff00000 /* extended family */
#define CPUID_XFAM_K8 0
#define CPUID_XMOD 0x000f0000 /* extended model */
#define CPUID_XMOD_REV_G 0x00060000
#define CPUID_XMOD_REV_MASK 0x00080000
#define CPUID_XFAM_10H 0x00100000 /* family 0x10 */
#define CPUID_USE_XFAM_XMOD 0x00000f00
#define CPUID_GET_MAX_CAPABILITIES 0x80000000