mirror of https://github.com/acidanthera/audk.git
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/** @file
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The boot services environment configuration library for the Hardware Access Sample PRM module.
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Copyright (c) Microsoft Corporation
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Protocol/PrmConfig.h>
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#include <Samples/PrmSampleHardwareAccessModule/Hpet.h>
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STATIC EFI_HANDLE mPrmConfigProtocolHandle;
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// {0ef93ed7-14ae-425b-928f-b85a6213b57e}
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STATIC CONST EFI_GUID mPrmModuleGuid = {
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0x0ef93ed7, 0x14ae, 0x425b, { 0x92, 0x8f, 0xb8, 0x5a, 0x62, 0x13, 0xb5, 0x7e }
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};
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/**
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Constructor of the PRM configuration library.
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@param[in] ImageHandle The image handle of the driver.
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@param[in] SystemTable The EFI System Table pointer.
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@retval EFI_SUCCESS The shell command handlers were installed successfully.
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@retval EFI_UNSUPPORTED The shell level required was not found.
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**/
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EFI_STATUS
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EFIAPI
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HardwareAccessModuleConfigLibConstructor (
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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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PRM_RUNTIME_MMIO_RANGES *RuntimeMmioRanges;
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PRM_CONFIG_PROTOCOL *PrmConfigProtocol;
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RuntimeMmioRanges = NULL;
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PrmConfigProtocol = NULL;
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/*
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In this sample PRM module, the protocol describing this sample module's resources is simply
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installed in the constructor.
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However, if some data is not available until later, this constructor could register a callback
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on the dependency for the data to be available (e.g. ability to communicate with some device)
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and then install the protocol. The requirement is that the protocol is installed before end of DXE.
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*/
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// Runtime MMIO Ranges structure
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// Since this sample module only uses 1 runtime MMIO range, it can use the PRM_RUNTIME_MMIO_RANGES
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// type directly without extending the size of the data buffer for additional MMIO ranges.
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RuntimeMmioRanges = AllocateRuntimeZeroPool (sizeof (*RuntimeMmioRanges));
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ASSERT (RuntimeMmioRanges != NULL);
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if (RuntimeMmioRanges == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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goto Done;
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}
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// Allocate the PRM Configuration protocol structure for this PRM module
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PrmConfigProtocol = AllocateZeroPool (sizeof (*PrmConfigProtocol));
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ASSERT (PrmConfigProtocol != NULL);
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if (PrmConfigProtocol == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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goto Done;
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}
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CopyGuid (&PrmConfigProtocol->ModuleContextBuffers.ModuleGuid, &mPrmModuleGuid);
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// Populate the Runtime MMIO Ranges structure
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RuntimeMmioRanges->Count = 1;
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RuntimeMmioRanges->Range[0].PhysicalBaseAddress = HPET_BASE_ADDRESS;
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RuntimeMmioRanges->Range[0].Length = HPET_RANGE_LENGTH;
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PrmConfigProtocol->ModuleContextBuffers.RuntimeMmioRanges = RuntimeMmioRanges;
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//
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// Install the PRM Configuration Protocol for this module. This indicates the configuration
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// library has completed resource initialization for the PRM module.
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//
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Status = gBS->InstallProtocolInterface (
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&mPrmConfigProtocolHandle,
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&gPrmConfigProtocolGuid,
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EFI_NATIVE_INTERFACE,
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(VOID *)PrmConfigProtocol
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);
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Done:
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if (EFI_ERROR (Status)) {
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if (RuntimeMmioRanges != NULL) {
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FreePool (RuntimeMmioRanges);
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}
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if (PrmConfigProtocol != NULL) {
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FreePool (PrmConfigProtocol);
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}
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}
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return Status;
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}
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