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/** @file
*
* Copyright (c) 2017, Linaro, Ltd. All rights reserved.
*
* This program and the accompanying materials
* are licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/
#include <PiDxe.h>
#include <Library/ArmGicLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/DxeServicesLib.h>
#include <Library/IoLib.h>
#include <Library/MemoryAllocationLib.h>
#include "ArmPlatform.h"
typedef enum {
ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2,
ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2_LEGACY,
ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV3,
ARM_FVP_FOUNDATION_GICV2,
ARM_FVP_FOUNDATION_GICV2_LEGACY,
ARM_FVP_FOUNDATION_GICV3,
ARM_FVP_UNKNOWN,
} ARM_VEXPRESS_PLATFORM_ID;
ARM_VEXPRESS_PLATFORM_ID
GetPlatformId (
VOID
)
{
UINT32 SysId;
UINT32 FvpSysId;
UINT32 VariantSysId;
ARM_GIC_ARCH_REVISION GicRevision;
SysId = MmioRead32 (ARM_VE_SYS_ID_REG);
// Remove the GIC variant to identify if we are running on the FVP Base or
// Foundation models
FvpSysId = SysId & (ARM_FVP_SYS_ID_HBI_MASK | ARM_FVP_SYS_ID_PLAT_MASK );
// Extract the variant from the SysId
VariantSysId = SysId & ARM_FVP_SYS_ID_VARIANT_MASK;
if (FvpSysId == ARM_FVP_BASE_BOARD_SYS_ID) {
if (VariantSysId == ARM_FVP_GIC_VE_MMAP) {
// FVP Base Model with legacy GIC memory map -- no longer supported
return ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2_LEGACY;
} else {
GicRevision = ArmGicGetSupportedArchRevision ();
if (GicRevision == ARM_GIC_ARCH_REVISION_2) {
// FVP Base Model with GICv2 support
return ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2;
} else {
// FVP Base Model with GICv3 support
return ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV3;
}
}
} else if (FvpSysId == ARM_FVP_FOUNDATION_BOARD_SYS_ID) {
if (VariantSysId == ARM_FVP_GIC_VE_MMAP) {
// FVP Foundation Model with legacy GIC memory map -- no longer supported
return ARM_FVP_FOUNDATION_GICV2_LEGACY;
} else {
GicRevision = ArmGicGetSupportedArchRevision ();
if (GicRevision == ARM_GIC_ARCH_REVISION_2) {
// FVP Foundation Model with GICv2
return ARM_FVP_FOUNDATION_GICV2;
} else {
// FVP Foundation Model with GICv3
return ARM_FVP_FOUNDATION_GICV3;
}
}
}
return ARM_FVP_UNKNOWN;
}
/**
Return a pool allocated copy of the DTB image that is appropriate for
booting the current platform via DT.
@param[out] Dtb Pointer to the DTB copy
@param[out] DtbSize Size of the DTB copy
@retval EFI_SUCCESS Operation completed successfully
@retval EFI_NOT_FOUND No suitable DTB image could be located
@retval EFI_OUT_OF_RESOURCES No pool memory available
**/
EFI_STATUS
EFIAPI
DtPlatformLoadDtb (
OUT VOID **Dtb,
OUT UINTN *DtbSize
)
{
EFI_STATUS Status;
VOID *OrigDtb;
VOID *CopyDtb;
UINTN OrigDtbSize;
ARM_VEXPRESS_PLATFORM_ID PlatformId;
PlatformId = GetPlatformId ();
ASSERT (PlatformId < ARM_FVP_UNKNOWN);
if (PlatformId >= ARM_FVP_UNKNOWN) {
return EFI_NOT_FOUND;
}
Status = GetSectionFromAnyFv (&gDtPlatformDefaultDtbFileGuid,
EFI_SECTION_RAW, (UINTN)PlatformId, &OrigDtb, &OrigDtbSize);
if (EFI_ERROR (Status)) {
return EFI_NOT_FOUND;
}
CopyDtb = AllocateCopyPool (OrigDtbSize, OrigDtb);
if (CopyDtb == NULL) {
return EFI_OUT_OF_RESOURCES;
}
*Dtb = CopyDtb;
*DtbSize = OrigDtbSize;
return EFI_SUCCESS;
}
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