diff options
| author | Michael Brown | 2018-03-20 16:26:49 +0100 |
|---|---|---|
| committer | Michael Brown | 2018-03-20 16:26:49 +0100 |
| commit | 3ec2079ce2078ff67c1f857eaf29293586bb5497 (patch) | |
| tree | bf1f114ad62ac06393b11e4f682ee1b80ba6dfd5 /src/include | |
| parent | [efi] Provide Map_Mem() and associated UNDI callbacks (diff) | |
| download | ipxe-3ec2079ce2078ff67c1f857eaf29293586bb5497.tar.gz ipxe-3ec2079ce2078ff67c1f857eaf29293586bb5497.tar.xz ipxe-3ec2079ce2078ff67c1f857eaf29293586bb5497.zip | |
[time] Add support for the ACPI power management timer
Allow the ACPI power management timer to be used if enabled via
TIMER_ACPI in config/timer.h. This provides an alternative timer on
systems where the standard 8254 PIT is unavailable or unreliable.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/acpi.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/include/ipxe/acpi.h b/src/include/ipxe/acpi.h index 68131e73..78f40253 100644 --- a/src/include/ipxe/acpi.h +++ b/src/include/ipxe/acpi.h @@ -119,6 +119,10 @@ struct acpi_fadt { uint32_t pm1a_cnt_blk; /** PM1b Control Register Block */ uint32_t pm1b_cnt_blk; + /** PM2 Control Register Block */ + uint32_t pm2_cnt_blk; + /** PM Timer Control Register Block */ + uint32_t pm_tmr_blk; } __attribute__ (( packed )); /** ACPI PM1 Control Register (within PM1a_CNT_BLK or PM1A_CNT_BLK) */ @@ -126,6 +130,9 @@ struct acpi_fadt { #define ACPI_PM1_CNT_SLP_TYP(x) ( (x) << 10 ) /**< Sleep type */ #define ACPI_PM1_CNT_SLP_EN ( 1 << 13 ) /**< Sleep enable */ +/** ACPI PM Timer Register (within PM_TMR_BLK) */ +#define ACPI_PM_TMR 0 + /** Differentiated System Description Table (DSDT) signature */ #define DSDT_SIGNATURE ACPI_SIGNATURE ( 'D', 'S', 'D', 'T' ) |