mirror of https://github.com/acidanthera/audk.git
82 lines
3.2 KiB
C
82 lines
3.2 KiB
C
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/** @file
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*
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* Copyright (c) 2013-2014, ARM Limited. All rights reserved.
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*
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* This program and the accompanying materials
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* are licensed and made available under the terms and conditions of the BSD License
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* which accompanies this distribution. The full text of the license may be found at
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* http://opensource.org/licenses/bsd-license.php
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*
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* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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*
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**/
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#include "ArmJunoDxeInternal.h"
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#include <Library/ArmShellCmdLib.h>
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EFI_STATUS
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EFIAPI
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ArmJunoEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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EFI_PHYSICAL_ADDRESS HypBase;
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Status = PciEmulationEntryPoint ();
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// If a hypervisor has been declared then we need to make sure its region is protected at runtime
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//
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// Note: This code is only a workaround for our dummy hypervisor (ArmPkg/Extra/AArch64ToAArch32Shim/)
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// that does not set up (yet) the stage 2 translation table to hide its own memory to EL1.
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//
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if (FixedPcdGet32 (PcdHypFvSize) != 0) {
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// Ensure the hypervisor region is strictly contained into a EFI_PAGE_SIZE-aligned region.
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// The memory must be a multiple of EFI_PAGE_SIZE to ensure we do not reserve more memory than the hypervisor itself.
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// A UEFI Runtime region size granularity cannot be smaller than EFI_PAGE_SIZE. If the hypervisor size is not rounded
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// to this size then there is a risk some non-runtime memory could be visible to the OS view.
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if (((FixedPcdGet32 (PcdHypFvSize) & EFI_PAGE_MASK) == 0) && ((FixedPcdGet32 (PcdHypFvBaseAddress) & EFI_PAGE_MASK) == 0)) {
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// The memory needs to be declared because the DXE core marked it as reserved and removed it from the memory space
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// as it contains the Firmware.
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Status = gDS->AddMemorySpace (
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EfiGcdMemoryTypeSystemMemory,
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FixedPcdGet32 (PcdHypFvBaseAddress), FixedPcdGet32 (PcdHypFvSize),
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EFI_MEMORY_WB | EFI_MEMORY_RUNTIME
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);
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if (!EFI_ERROR (Status)) {
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// We allocate the memory to ensure it is marked as runtime memory
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HypBase = FixedPcdGet32 (PcdHypFvBaseAddress);
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Status = gBS->AllocatePages (AllocateAddress, EfiRuntimeServicesCode,
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EFI_SIZE_TO_PAGES (FixedPcdGet32 (PcdHypFvSize)), &HypBase);
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}
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} else {
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// The hypervisor must be contained into a EFI_PAGE_SIZE-aligned region and its size must also be aligned
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// on a EFI_PAGE_SIZE boundary (ie: 4KB).
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Status = EFI_UNSUPPORTED;
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ASSERT_EFI_ERROR (Status);
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}
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if (EFI_ERROR (Status)) {
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return Status;
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}
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}
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// Install dynamic Shell command to run baremetal binaries.
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Status = ShellDynCmdRunAxfInstall (ImageHandle);
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "ArmJunoDxe: Failed to install ShellDynCmdRunAxf\n"));
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}
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// Try to install the Flat Device Tree (FDT). This function actually installs the
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// UEFI Driver Binding Protocol.
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Status = JunoFdtInstall (ImageHandle);
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return Status;
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}
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