/** @file
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Runtime Lib function for QNC internal network access.
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Copyright (c) 2013-2015 Intel Corporation.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiDxe.h>
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#include <Guid/EventGroup.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiRuntimeLib.h>
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#include <Library/QNCAccessLib.h>
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///
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/// Set Virtual Address Map Event
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///
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EFI_EVENT mDxeRuntimeQncAccessLibVirtualNotifyEvent = NULL;
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///
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/// Module global that contains the base physical address of the PCI Express MMIO range.
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///
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UINTN mDxeRuntimeQncAccessLibPciExpressBaseAddress = 0;
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/**
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Convert the physical PCI Express MMIO address to a virtual address.
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@param[in] Event The event that is being processed.
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@param[in] Context The Event Context.
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**/
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VOID
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EFIAPI
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DxeRuntimeQncAccessLibVirtualNotify (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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EFI_STATUS Status;
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//
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// Convert the physical PCI Express MMIO address to a virtual address.
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//
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Status = EfiConvertPointer (0, (VOID **) &mDxeRuntimeQncAccessLibPciExpressBaseAddress);
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ASSERT_EFI_ERROR (Status);
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}
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/**
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The constructor function to setup globals and goto virtual mode notify.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The constructor completed successfully.
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@retval Other value The constructor did not complete successfully.
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**/
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EFI_STATUS
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EFIAPI
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DxeRuntimeQncAccessLibConstructor (
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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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//
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// Cache the physical address of the PCI Express MMIO range into a module global variable
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//
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mDxeRuntimeQncAccessLibPciExpressBaseAddress = (UINTN) PcdGet64(PcdPciExpressBaseAddress);
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//
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// Register SetVirtualAddressMap () notify function
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//
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Status = gBS->CreateEventEx (
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EVT_NOTIFY_SIGNAL,
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TPL_NOTIFY,
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DxeRuntimeQncAccessLibVirtualNotify,
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NULL,
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&gEfiEventVirtualAddressChangeGuid,
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&mDxeRuntimeQncAccessLibVirtualNotifyEvent
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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/**
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The destructor function frees any allocated buffers and closes the Set Virtual
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Address Map event.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The destructor completed successfully.
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@retval Other value The destructor did not complete successfully.
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**/
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EFI_STATUS
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EFIAPI
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DxeRuntimeQncAccessLibDestructor (
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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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//
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// Close the Set Virtual Address Map event
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//
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Status = gBS->CloseEvent (mDxeRuntimeQncAccessLibVirtualNotifyEvent);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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/**
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Gets the base address of PCI Express for Quark North Cluster.
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@return The base address of PCI Express for Quark North Cluster.
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**/
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UINTN
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EFIAPI
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QncGetPciExpressBaseAddress (
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VOID
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)
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{
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//
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// If system goes to virtual mode then virtual notify callback will update
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// mDxeRuntimeQncAccessLibPciExpressBaseAddress with virtual address of
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// PCIe memory base.
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//
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return mDxeRuntimeQncAccessLibPciExpressBaseAddress;
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}
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