mirror of https://github.com/acidanthera/audk.git
015be4075f
Some virtual machine managers like Kvmtool emulate the MC146818
RTC controller in the MMIO space so that architectures that do
not support I/O Mapped I/O can use the RTC. This patch adds MMIO
support to the RTC controller driver.
The PCD PcdRtcUseMmio has been added to select I/O or MMIO support.
If PcdRtcUseMmio is:
TRUE - Indicates the RTC port registers are in MMIO space.
FALSE - Indicates the RTC port registers are in I/O space.
Default is I/O space.
Additionally two new PCDs PcdRtcIndexRegister64 and
PcdRtcTargetRegister64 have been introduced to provide the base
address for the RTC registers in the MMIO space.
When MMIO support is selected (PcdRtcUseMmio == TRUE) the driver
converts the pointers to the RTC MMIO registers so that the
RTC registers are accessible post ExitBootServices.
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
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| .. | ||
| Bus/Pci/IdeControllerDxe | ||
| HpetTimerDxe | ||
| Include | ||
| Library | ||
| PcatRealTimeClockRuntimeDxe | ||
| PcAtChipsetPkg.ci.yaml | ||
| PcAtChipsetPkg.dec | ||
| PcAtChipsetPkg.dsc | ||
| PcAtChipsetPkg.uni | ||
| PcAtChipsetPkgExtra.uni | ||