/**
* Generic UEFI Entrypoint for 'ArmHwDxe' driver
* See UEFI specification for the details of the parameters
*/
EFI_STATUS
EFIAPI
ArmHwInitialise (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
// Install dynamic Shell command to run baremetal binaries.
Status = ShellDynCmdRunAxfInstall (ImageHandle);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "ArmHwDxe: Failed to install ShellDynCmdRunAxf\n"));
}
return Status;
}
EFI_STATUS
EFIAPI
ArmJunoEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS HypBase;
Status = PciEmulationEntryPoint ();
if (EFI_ERROR (Status)) {
return Status;
}
//
// If a hypervisor has been declared then we need to make sure its region is protected at runtime
//
// Note: This code is only a workaround for our dummy hypervisor (ArmPkg/Extra/AArch64ToAArch32Shim/)
// that does not set up (yet) the stage 2 translation table to hide its own memory to EL1.
//
if (FixedPcdGet32 (PcdHypFvSize) != 0) {
// Ensure the hypervisor region is strictly contained into a EFI_PAGE_SIZE-aligned region.
// The memory must be a multiple of EFI_PAGE_SIZE to ensure we do not reserve more memory than the hypervisor itself.
// A UEFI Runtime region size granularity cannot be smaller than EFI_PAGE_SIZE. If the hypervisor size is not rounded
// to this size then there is a risk some non-runtime memory could be visible to the OS view.
if (((FixedPcdGet32 (PcdHypFvSize) & EFI_PAGE_MASK) == 0) && ((FixedPcdGet32 (PcdHypFvBaseAddress) & EFI_PAGE_MASK) == 0)) {
// The memory needs to be declared because the DXE core marked it as reserved and removed it from the memory space
// as it contains the Firmware.
Status = gDS->AddMemorySpace (
EfiGcdMemoryTypeSystemMemory,
FixedPcdGet32 (PcdHypFvBaseAddress), FixedPcdGet32 (PcdHypFvSize),
EFI_MEMORY_WB | EFI_MEMORY_RUNTIME
);
if (!EFI_ERROR (Status)) {
// We allocate the memory to ensure it is marked as runtime memory
HypBase = FixedPcdGet32 (PcdHypFvBaseAddress);
Status = gBS->AllocatePages (AllocateAddress, EfiRuntimeServicesCode,
EFI_SIZE_TO_PAGES (FixedPcdGet32 (PcdHypFvSize)), &HypBase);
}
} else {
// The hypervisor must be contained into a EFI_PAGE_SIZE-aligned region and its size must also be aligned
// on a EFI_PAGE_SIZE boundary (ie: 4KB).
Status = EFI_UNSUPPORTED;
ASSERT_EFI_ERROR (Status);
}
if (EFI_ERROR (Status)) {
return Status;
}
}
// Install dynamic Shell command to run baremetal binaries.
Status = ShellDynCmdRunAxfInstall (ImageHandle);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "ArmJunoDxe: Failed to install ShellDynCmdRunAxf\n"));
}
// Try to install the Flat Device Tree (FDT). This function actually installs the
// UEFI Driver Binding Protocol.
Status = JunoFdtInstall (ImageHandle);
return Status;
}
