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ACPICA: Add time macros for various timer/time manipulation. 

Constants for time manipulation, including constants for the 100
nanosecond timers. Chao Guan, Bob Moore, Lv Zheng.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2012-12-31 00:05:46 +00:00 committed by Rafael J. Wysocki
parent c8d586f8ed
commit c41679a448
4 changed files with 22 additions and 6 deletions
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2
drivers/acpi/acpica/hwsleep.c
View File

@ -177,7 +177,7 @@ acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
* to still read the right value. Ideally, this block would go
* away entirely.
*/
acpi_os_stall(10000000);
acpi_os_stall(10 * ACPI_USEC_PER_SEC);
status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL,
sleep_enable_reg_info->

7
drivers/acpi/acpica/hwtimer.c
View File

@ -176,10 +176,11 @@ acpi_get_timer_duration(u32 start_ticks, u32 end_ticks, u32 * time_elapsed)
/*
* Compute Duration (Requires a 64-bit multiply and divide):
*
* time_elapsed = (delta_ticks * 1000000) / PM_TIMER_FREQUENCY;
* time_elapsed (microseconds) =
* (delta_ticks * ACPI_USEC_PER_SEC) / ACPI_PM_TIMER_FREQUENCY;
*/
status = acpi_ut_short_divide(((u64) delta_ticks) * 1000000,
PM_TIMER_FREQUENCY, &quotient, NULL);
status = acpi_ut_short_divide(((u64)delta_ticks) * ACPI_USEC_PER_SEC,
ACPI_PM_TIMER_FREQUENCY, &quotient, NULL);
*time_elapsed = (u32) quotient;
return_ACPI_STATUS(status);

2
drivers/acpi/acpica/hwxfsleep.c
View File

@ -207,7 +207,7 @@ acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
(u32)acpi_gbl_FADT.s4_bios_request, 8);
do {
acpi_os_stall(1000);
acpi_os_stall(ACPI_USEC_PER_MSEC);
status =
acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
if (ACPI_FAILURE(status)) {

17
include/acpi/actypes.h
View File

@ -341,7 +341,7 @@ typedef u32 acpi_physical_address;
/* PM Timer ticks per second (HZ) */
#define PM_TIMER_FREQUENCY 3579545
#define ACPI_PM_TIMER_FREQUENCY 3579545
/*******************************************************************************
*
@ -373,6 +373,21 @@ typedef u32 acpi_name; /* 4-byte ACPI name */
typedef char *acpi_string; /* Null terminated ASCII string */
typedef void *acpi_handle; /* Actually a ptr to a NS Node */
/* Time constants for timer calculations */
#define ACPI_MSEC_PER_SEC 1000L
#define ACPI_USEC_PER_MSEC 1000L
#define ACPI_USEC_PER_SEC 1000000L
#define ACPI_100NSEC_PER_USEC 10L
#define ACPI_100NSEC_PER_MSEC 10000L
#define ACPI_100NSEC_PER_SEC 10000000L
#define ACPI_NSEC_PER_USEC 1000L
#define ACPI_NSEC_PER_MSEC 1000000L
#define ACPI_NSEC_PER_SEC 1000000000L
/* Owner IDs are used to track namespace nodes for selective deletion */
typedef u8 acpi_owner_id;