mirror of https://github.com/acidanthera/audk.git
85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/** @file
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Copyright (c) 2014, ARM Ltd. All rights reserved.
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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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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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
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WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "ArmVExpressInternal.h"
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#include <Library/ArmPlatformLib.h> // To get Core Count
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//
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// Description of the four ARM model platforms :
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// Platform ids are defined in ArmVExpressInternal.h for
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// all "ArmVExpress-like" platforms (AARCH64 or ARM architecture,
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// model or hardware platforms).
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//
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CONST ARM_VEXPRESS_PLATFORM ArmVExpressPlatforms[] = {
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{ ARM_FVP_VEXPRESS_A9x4, FixedPcdGetPtr (PcdFdtVExpressFvpA9x4), L"rtsm_ve-cortex_a9x4.dtb" },
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{ ARM_FVP_VEXPRESS_A15x1, FixedPcdGetPtr (PcdFdtVExpressFvpA15x1), L"rtsm_ve-cortex_a15x1.dtb" },
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{ ARM_FVP_VEXPRESS_A15x2, FixedPcdGetPtr (PcdFdtVExpressFvpA15x2), L"rtsm_ve-cortex_a15x2.dtb" },
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{ ARM_FVP_VEXPRESS_A15x4, FixedPcdGetPtr (PcdFdtVExpressFvpA15x4), L"rtsm_ve-cortex_a15x4.dtb" },
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{ ARM_FVP_VEXPRESS_UNKNOWN, }
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};
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/**
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Get information about the VExpress platform the firmware is running on.
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@param[out] Platform Address where the pointer to the platform information
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(type ARM_VEXPRESS_PLATFORM*) should be stored.
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The returned pointer does not point to an allocated
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memory area.
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@retval EFI_SUCCESS The platform information was returned.
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@retval EFI_NOT_FOUND The platform was not recognised.
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**/
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EFI_STATUS
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ArmVExpressGetPlatform (
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OUT CONST ARM_VEXPRESS_PLATFORM** Platform
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)
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{
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UINT32 SysId;
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UINTN CpuType;
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EFI_STATUS Status;
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UINTN CoreCount;
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ASSERT (Platform != NULL);
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CpuType = 0;
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Status = EFI_NOT_FOUND;
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*Platform = NULL;
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SysId = MmioRead32 (ARM_VE_SYS_ID_REG);
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if (SysId == ARM_RTSM_SYS_ID) {
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// Get the Cortex-A version
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CpuType = (ArmReadMidr () >> 4) & ARM_CPU_TYPE_MASK;
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if (CpuType == ARM_CPU_TYPE_A9) {
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Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A9x4, Platform);
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} else if (CpuType == ARM_CPU_TYPE_A15) {
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CoreCount = ArmGetCpuCountPerCluster ();
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if (CoreCount == 1) {
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Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x1, Platform);
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} else if (CoreCount == 2) {
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Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x2, Platform);
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} else if (CoreCount == 4) {
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Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x4, Platform);
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}
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}
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}
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if (EFI_ERROR (Status)) {
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DEBUG ((EFI_D_ERROR, "Unsupported platform (SysId:0x%X, CpuType:0x%X)\n", SysId, CpuType));
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ASSERT_EFI_ERROR (Status);
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}
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return Status;
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}
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