Current implemenation sets PM1_CNT.SCI_EN bit at ReadyToBoot event.
However, this should not be done because this causes OS to skip triggering
FADT.SMI_CMD, which leads to the functions implemented in the SMI
handler being omitted.
This issue was identified by Matt Delco <delco@google.com>.
The fix does the following:
- The SCI_EN bit setting is removed from CbSupportDxe driver.
- Some additional checks are added in CbParseFadtInfo() in CbParseLib.c to
output some error message and ASSERT (FALSE) if ALL of the following
conditions are met:
1) HARDWARE_REDUCED_ACPI is not set;
2) SMI_CMD field is zero;
3) SCI_EN bit is zero;
which indicates the ACPI enabling status is inconsistent: SCI is not
enabled but the ACPI table does not provide a means to enable it through
FADT->SMI_CMD. This may cause issues in OS.
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Prince Agyeman <prince.agyeman@intel.com>
Cc: Matt Delco <delco@google.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Benjamin You <benjamin.you@intel.com>
Reviewed-by: Maurice Ma <maurice.ma@intel.com>
Reviewed-by: Matt Delco <delco@google.com>
Initial coreboot UEFI payload code check in. It provides UEFI services on top of coreboot that allows UEFI OS boot.
CorebootModulePkg is the source code package of coreboot support modules that will be used to parse the coreboot tables and report memory/io resources.
It supports the following features:
- Support Unified Extensible Firmware Interface (UEFI) specification 2.4.
- Support Platform Initialization(PI) specification 1.3.
- Support execution as a coreboot payload.
- Support USB 3.0
- Support SATA/ATA devices.
- Support EFI aware OS boot.
The following features are not supported currently and have not been validated:
- GCC Tool Chains
- SMM Execution Environment
- Security Boot
It was tested on a Intel Bay Trail CRB platform.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Maurice Ma <maurice.ma@intel.com>
Reviewed-by: Prince Agyeman <prince.agyeman@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17084 6f19259b-4bc3-4df7-8a09-765794883524
Benjamin You
Maurice Ma