diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2012-09-06 08:01:00 +0200 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2012-09-10 20:35:53 -0400 |
| commit | 455a7c87e8227d83b7bd8982285fed95546cb8c9 (patch) | |
| tree | 757a0db856d9e07af8a84116aa85ba5367a6a3d3 /src/Kconfig | |
| parent | a1a32838257368a26b3a74c4c8acf4c6d7b616e2 (diff) | |
| download | seabios-455a7c87e8227d83b7bd8982285fed95546cb8c9.tar.gz | |
add acpi pmtimer support
This patch makes seabios use the acpi pmtimer instead of tsc for
timekeeping. The pmtimer has a fixed frequency and doesn't need
calibration, thus it doesn't suffer from calibration errors due to a
loaded host machine.
[ v4: mask port ioport read ]
[ v2: add CONFIG_PMTIMER ]
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'src/Kconfig')
| -rw-r--r-- | src/Kconfig | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/Kconfig b/src/Kconfig index 6de3e715..b5dd63bd 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -222,6 +222,12 @@ menu "Hardware support" default y help Initialize the Memory Type Range Registers (on emulators). + config PMTIMER + depends on !COREBOOT + bool "Use ACPI timer" + default y + help + Use the ACPI timer instead of the TSC for timekeeping (on qemu). endmenu menu "BIOS interfaces" |