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[PATCH] Add support for type argument in PAL_GET_PSTATE

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PAL_GET_PSTATE accepts a type argument to return different kinds of
frequency information.
Refer: Intel ItaniumArchitecture Software Developer's Manual -
Volume 2: System Architecture, Revision 2.2
(http://developer.intel.com/design/itanium/manuals/245318.htm)

Add the support for type argument and use Instantaneous frequency
in the acpi driver.

Also fix a bug, where in return value of PAL_GET_PSTATE was getting compared
with 'control' bits instead of 'status' bits.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Venkatesh Pallipadi 2006-12-01 15:28:14 -08:00 committed by Tony Luck
parent 6dbfc19b7e
commit 17e77b1cc3
2 changed files with 11 additions and 9 deletions
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11
arch/ia64/kernel/cpufreq/acpi-cpufreq.c
View File

@ -68,7 +68,8 @@ processor_get_pstate (
dprintk("processor_get_pstate\n");
retval = ia64_pal_get_pstate(&pstate_index);
retval = ia64_pal_get_pstate(&pstate_index,
PAL_GET_PSTATE_TYPE_INSTANT);
*value = (u32) pstate_index;
if (retval)
@ -91,7 +92,7 @@ extract_clock (
dprintk("extract_clock\n");
for (i = 0; i < data->acpi_data.state_count; i++) {
if (value >= data->acpi_data.states[i].control)
if (value == data->acpi_data.states[i].status)
return data->acpi_data.states[i].core_frequency;
}
return data->acpi_data.states[i-1].core_frequency;
@ -117,11 +118,7 @@ processor_get_freq (
goto migrate_end;
}
/*
* processor_get_pstate gets the average frequency since the
* last get. So, do two PAL_get_freq()...
*/
ret = processor_get_pstate(&value);
/* processor_get_pstate gets the instantaneous frequency */
ret = processor_get_pstate(&value);
if (ret) {

9
include/asm-ia64/pal.h
View File

@ -84,6 +84,11 @@
#define PAL_SET_PSTATE 263 /* set the P-state */
#define PAL_BRAND_INFO 274 /* Processor branding information */
#define PAL_GET_PSTATE_TYPE_LASTSET 0
#define PAL_GET_PSTATE_TYPE_AVGANDRESET 1
#define PAL_GET_PSTATE_TYPE_AVGNORESET 2
#define PAL_GET_PSTATE_TYPE_INSTANT 3
#ifndef __ASSEMBLY__
#include <linux/types.h>
@ -1141,10 +1146,10 @@ ia64_pal_halt_info (pal_power_mgmt_info_u_t *power_buf)
/* Get the current P-state information */
static inline s64
ia64_pal_get_pstate (u64 *pstate_index)
ia64_pal_get_pstate (u64 *pstate_index, unsigned long type)
{
struct ia64_pal_retval iprv;
PAL_CALL_STK(iprv, PAL_GET_PSTATE, 0, 0, 0);
PAL_CALL_STK(iprv, PAL_GET_PSTATE, type, 0, 0);
*pstate_index = iprv.v0;
return iprv.status;
}