diff options
Diffstat (limited to 'ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c')
| -rwxr-xr-x | ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c b/ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c index f4c27c5750..3559e08862 100755 --- a/ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c +++ b/ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c @@ -95,7 +95,10 @@ InitializeMemory ( )
{
EFI_STATUS Status;
+ UINTN SystemMemoryBase;
UINTN SystemMemoryTop;
+ UINTN FdBase;
+ UINTN FdTop;
UINTN UefiMemoryBase;
DEBUG ((EFI_D_ERROR, "Memory Init PEIM Loaded\n"));
@@ -103,27 +106,44 @@ InitializeMemory ( // Ensure PcdSystemMemorySize has been set
ASSERT (FixedPcdGet32 (PcdSystemMemorySize) != 0);
- SystemMemoryTop = (UINTN)FixedPcdGet32 (PcdSystemMemoryBase) + (UINTN)FixedPcdGet32 (PcdSystemMemorySize);
+ SystemMemoryBase = (UINTN)FixedPcdGet32 (PcdSystemMemoryBase);
+ SystemMemoryTop = SystemMemoryBase + (UINTN)FixedPcdGet32 (PcdSystemMemorySize);
+ FdBase = (UINTN)PcdGet32 (PcdNormalFdBaseAddress);
+ FdTop = FdBase + (UINTN)PcdGet32 (PcdNormalFdSize);
//
// Initialize the System Memory (DRAM)
//
- if (PcdGet32 (PcdStandalone)) {
- // In case of a standalone version, the DRAM is already initialized
- ArmPlatformInitializeSystemMemory();
+ if (!FeaturePcdGet (PcdSystemMemoryInitializeInSec)) {
+ // In case the DRAM has not been initialized by the secure firmware
+ ArmPlatformInitializeSystemMemory ();
}
//
// Declare the UEFI memory to PEI
//
- if (PcdGet32 (PcdStandalone)) {
- // In case of standalone UEFI, we set the UEFI memory region at the top of the DRAM
- UefiMemoryBase = SystemMemoryTop - FixedPcdGet32 (PcdSystemMemoryUefiRegionSize);
+
+ // In case the firmware has been shadowed in the System Memory
+ if ((FdBase >= SystemMemoryBase) && (FdTop <= SystemMemoryTop)) {
+ // Check if there is enough space between the top of the system memory and the top of the
+ // firmware to place the UEFI memory (for PEI & DXE phases)
+ if (SystemMemoryTop - FdTop >= FixedPcdGet32 (PcdSystemMemoryUefiRegionSize)) {
+ UefiMemoryBase = SystemMemoryTop - FixedPcdGet32 (PcdSystemMemoryUefiRegionSize);
+ } else {
+ // Check there is enough space for the UEFI memory
+ ASSERT (SystemMemoryBase + FixedPcdGet32 (PcdSystemMemoryUefiRegionSize) <= FdBase);
+
+ UefiMemoryBase = FdBase - FixedPcdGet32 (PcdSystemMemoryUefiRegionSize);
+ }
} else {
- // In case of a non standalone UEFI, we set the UEFI memory below the Firmware Volume
- UefiMemoryBase = FixedPcdGet32 (PcdNormalFdBaseAddress) - FixedPcdGet32 (PcdSystemMemoryUefiRegionSize);
+ // Check the Firmware does not overlapped with the system memory
+ ASSERT ((FdBase < SystemMemoryBase) || (FdBase >= SystemMemoryTop));
+ ASSERT ((FdTop <= SystemMemoryBase) || (FdTop > SystemMemoryTop));
+
+ UefiMemoryBase = SystemMemoryTop - FixedPcdGet32 (PcdSystemMemoryUefiRegionSize);
}
- Status = PeiServicesInstallPeiMemory (UefiMemoryBase,FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
+
+ Status = PeiServicesInstallPeiMemory (UefiMemoryBase, FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
ASSERT_EFI_ERROR (Status);
// Initialize MMU and Memory HOBs (Resource Descriptor HOBs)
|