104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/** @file
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Source code file for the Base MMIO Init library
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@copyright
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INTEL CONFIDENTIAL
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Copyright 2018 Intel Corporation.
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The source code contained or described herein and all documents related to the
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source code ("Material") are owned by Intel Corporation or its suppliers or
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licensors. Title to the Material remains with Intel Corporation or its suppliers
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and licensors. The Material may contain trade secrets and proprietary and
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confidential information of Intel Corporation and its suppliers and licensors,
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and is protected by worldwide copyright and trade secret laws and treaty
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provisions. No part of the Material may be used, copied, reproduced, modified,
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published, uploaded, posted, transmitted, distributed, or disclosed in any way
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without Intel's prior express written permission.
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No license under any patent, copyright, trade secret or other intellectual
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property right is granted to or conferred upon you by disclosure or delivery
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of the Materials, either expressly, by implication, inducement, estoppel or
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otherwise. Any license under such intellectual property rights must be
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express and approved by Intel in writing.
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Unless otherwise agreed by Intel in writing, you may not remove or alter
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this notice or any other notice embedded in Materials by Intel or
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Intel's suppliers or licensors in any way.
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This file contains a 'Sample Driver' and is licensed as such under the terms
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of your license agreement with Intel or your vendor. This file may be modified
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by the user, subject to the additional terms of the license agreement.
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@par Specification Reference:
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**/
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#include <Uefi.h>
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#include <Pi/PiMultiPhase.h>
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#include <Library/HobLib.h>
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#include <Library/MmioInitLib.h>
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typedef struct {
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EFI_PHYSICAL_ADDRESS BaseAddress;
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UINT64 Length;
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} MEMORY_MAP;
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GLOBAL_REMOVE_IF_UNREFERENCED MEMORY_MAP MmioMap [] = {
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{FixedPcdGet64 (PcdLocalApicAddress), FixedPcdGet32 (PcdLocalApicMmioSize)},
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{FixedPcdGet64 (PcdMchBaseAddress), FixedPcdGet32 (PcdMchMmioSize)},
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{FixedPcdGet64 (PcdDmiBaseAddress), FixedPcdGet32 (PcdDmiMmioSize)},
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{FixedPcdGet64 (PcdEpBaseAddress), FixedPcdGet32 (PcdEpMmioSize)}
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};
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/**
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Initialize MMIO ranges
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@retval EFI_SUCCESS The function completed successfully
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**/
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EFI_STATUS
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MmioInit (
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VOID
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)
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{
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UINTN Index;
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MEMORY_MAP PcieMmioMap;
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///
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/// Build Memory Mapped IO Resource which is used to build E820 Table in LegacyBios.
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///
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PcieMmioMap.BaseAddress = FixedPcdGet64 (PcdPciExpressBaseAddress);
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PcieMmioMap.Length = PcdGet32 (PcdPciExpressRegionLength);
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BuildResourceDescriptorHob (
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EFI_RESOURCE_MEMORY_MAPPED_IO,
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(EFI_RESOURCE_ATTRIBUTE_PRESENT |
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EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
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EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE),
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PcieMmioMap.BaseAddress,
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PcieMmioMap.Length
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);
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BuildMemoryAllocationHob (
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PcieMmioMap.BaseAddress,
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PcieMmioMap.Length,
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EfiMemoryMappedIO
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);
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for (Index = 0; Index < sizeof (MmioMap) / (sizeof (MEMORY_MAP)); Index++) {
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BuildResourceDescriptorHob (
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EFI_RESOURCE_MEMORY_MAPPED_IO,
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(EFI_RESOURCE_ATTRIBUTE_PRESENT |
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EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
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EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE),
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MmioMap[Index].BaseAddress,
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MmioMap[Index].Length
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);
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BuildMemoryAllocationHob (
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MmioMap[Index].BaseAddress,
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MmioMap[Index].Length,
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EfiMemoryMappedIO
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);
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}
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return EFI_SUCCESS;
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}
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