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ArmPlatformPkg: Change the memory model for the ARM Platform components

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In the former memory model, the UEFI firmware was expected to be located
at the top of the system memory. Stacks & Pi memory regions were set below
the firmware.
On some platform, the UEFI firmware could be shadowed by the ROM firmware
(case of the BeagleBoard) and in some cases the firmware is copied at the
beginning of the system memory.

With this new memory model, stack and Pi/DXE memory regions are set at the
top of the system memory wherever the UEFI firmware is located in the memory
map.
Because DXE core does not support shadowed firmwares, the system memory covered
by the UEFI firmware is marked as 'Non Present' to avoid to be overlapped by
DXE allocations.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11992 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2011-07-06 16:27:21 +00:00
parent a6caee65ac
commit d269095b71
16 changed files with 413 additions and 359 deletions
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40
ArmPlatformPkg/MemoryInitPei/MemoryInitPeim.c
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@@ -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)