summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.c70
-rw-r--r--OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.inf5
-rw-r--r--OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmioInternal.h71
-rw-r--r--OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgMmioDxe.c97
4 files changed, 216 insertions, 27 deletions
diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.c b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.c
index 2a2f3e67ac..6da689b1df 100644
--- a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.c
+++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.c
@@ -3,15 +3,21 @@
Copyright (C) 2013 - 2014, Red Hat, Inc.
Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+ Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
+#include <Base.h>
#include <Uefi.h>
+#include <Pi/PiBootMode.h>
+#include <Pi/PiHob.h>
+
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
#include <Library/IoLib.h>
#include <Library/QemuFwCfgLib.h>
#include <Library/UefiBootServicesTableLib.h>
@@ -28,6 +34,50 @@ WRITE_BYTES_FUNCTION *InternalQemuFwCfgWriteBytes = MmioWriteBytes;
SKIP_BYTES_FUNCTION *InternalQemuFwCfgSkipBytes = MmioSkipBytes;
/**
+ Build firmware configure resource HOB.
+
+ @param[in] FwCfgResource A pointer to firmware configure resource.
+
+ @retval VOID
+**/
+VOID
+QemuBuildFwCfgResourceHob (
+ IN QEMU_FW_CFG_RESOURCE *FwCfgResource
+ )
+{
+ BuildGuidDataHob (
+ &gQemuFirmwareResourceHobGuid,
+ (VOID *)FwCfgResource,
+ sizeof (QEMU_FW_CFG_RESOURCE)
+ );
+}
+
+/**
+ Get firmware configure resource in HOB.
+
+ @param VOID
+
+ @retval non-NULL The firmware configure resource in HOB.
+ NULL The firmware configure resource not found.
+**/
+QEMU_FW_CFG_RESOURCE *
+QemuGetFwCfgResourceHob (
+ VOID
+ )
+{
+ EFI_HOB_GUID_TYPE *GuidHob;
+
+ GuidHob = NULL;
+
+ GuidHob = GetFirstGuidHob (&gQemuFirmwareResourceHobGuid);
+ if (GuidHob == NULL) {
+ return NULL;
+ }
+
+ return (QEMU_FW_CFG_RESOURCE *)GET_GUID_HOB_DATA (GuidHob);
+}
+
+/**
Returns a boolean indicating if the firmware configuration interface
is available or not.
@@ -43,7 +93,7 @@ QemuFwCfgIsAvailable (
VOID
)
{
- return (BOOLEAN)(mFwCfgSelectorAddress != 0 && mFwCfgDataAddress != 0);
+ return (BOOLEAN)(QemuGetFwCfgSelectorAddress () != 0 && QemuGetFwCfgDataAddress () != 0);
}
/**
@@ -62,7 +112,7 @@ QemuFwCfgSelectItem (
)
{
if (QemuFwCfgIsAvailable ()) {
- MmioWrite16 (mFwCfgSelectorAddress, SwapBytes16 ((UINT16)QemuFwCfgItem));
+ MmioWrite16 (QemuGetFwCfgSelectorAddress (), SwapBytes16 ((UINT16)QemuFwCfgItem));
}
}
@@ -92,30 +142,30 @@ MmioReadBytes (
#if defined (MDE_CPU_AARCH64) || defined (MDE_CPU_RISCV64) || defined (MDE_CPU_LOONGARCH64)
while (Ptr < End) {
- *(UINT64 *)Ptr = MmioRead64 (mFwCfgDataAddress);
+ *(UINT64 *)Ptr = MmioRead64 (QemuGetFwCfgDataAddress ());
Ptr += 8;
}
if (Left & 4) {
- *(UINT32 *)Ptr = MmioRead32 (mFwCfgDataAddress);
+ *(UINT32 *)Ptr = MmioRead32 (QemuGetFwCfgDataAddress ());
Ptr += 4;
}
#else
while (Ptr < End) {
- *(UINT32 *)Ptr = MmioRead32 (mFwCfgDataAddress);
+ *(UINT32 *)Ptr = MmioRead32 (QemuGetFwCfgDataAddress ());
Ptr += 4;
}
#endif
if (Left & 2) {
- *(UINT16 *)Ptr = MmioRead16 (mFwCfgDataAddress);
+ *(UINT16 *)Ptr = MmioRead16 (QemuGetFwCfgDataAddress ());
Ptr += 2;
}
if (Left & 1) {
- *Ptr = MmioRead8 (mFwCfgDataAddress);
+ *Ptr = MmioRead8 (QemuGetFwCfgDataAddress ());
}
}
@@ -168,9 +218,9 @@ DmaTransferBytes (
// This will fire off the transfer.
//
#if defined (MDE_CPU_AARCH64) || defined (MDE_CPU_RISCV64) || defined (MDE_CPU_LOONGARCH64)
- MmioWrite64 (mFwCfgDmaAddress, SwapBytes64 ((UINT64)&Access));
+ MmioWrite64 (QemuGetFwCfgDmaAddress (), SwapBytes64 ((UINT64)&Access));
#else
- MmioWrite32 ((UINT32)(mFwCfgDmaAddress + 4), SwapBytes32 ((UINT32)&Access));
+ MmioWrite32 ((UINT32)(QemuGetFwCfgDmaAddress () + 4), SwapBytes32 ((UINT32)&Access));
#endif
//
@@ -239,7 +289,7 @@ MmioWriteBytes (
UINTN Idx;
for (Idx = 0; Idx < Size; ++Idx) {
- MmioWrite8 (mFwCfgDataAddress, ((UINT8 *)Buffer)[Idx]);
+ MmioWrite8 (QemuGetFwCfgDataAddress (), ((UINT8 *)Buffer)[Idx]);
}
}
diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.inf b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.inf
index b3017aef80..633053aaed 100644
--- a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.inf
+++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.inf
@@ -4,6 +4,7 @@
#
# Copyright (C) 2013 - 2014, Red Hat, Inc.
# Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -39,11 +40,15 @@
BaseLib
BaseMemoryLib
DebugLib
+ HobLib
IoLib
UefiBootServicesTableLib
[Protocols]
gFdtClientProtocolGuid ## CONSUMES
+[Guids]
+ gQemuFirmwareResourceHobGuid
+
[Depex]
gFdtClientProtocolGuid
diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmioInternal.h b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmioInternal.h
index 8c63cf12ef..961612f067 100644
--- a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmioInternal.h
+++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmioInternal.h
@@ -12,9 +12,11 @@
#ifndef QEMU_FW_CFG_LIB_MMIO_INTERNAL_H_
#define QEMU_FW_CFG_LIB_MMIO_INTERNAL_H_
-extern UINTN mFwCfgSelectorAddress;
-extern UINTN mFwCfgDataAddress;
-extern UINTN mFwCfgDmaAddress;
+typedef struct {
+ UINTN FwCfgSelectorAddress;
+ UINTN FwCfgDataAddress;
+ UINTN FwCfgDmaAddress;
+} QEMU_FW_CFG_RESOURCE;
/**
Reads firmware configuration bytes into a buffer
@@ -91,6 +93,69 @@ VOID (EFIAPI *InternalQemuFwCfgSkipBytes)(
);
/**
+ Build firmware configure resource HOB.
+
+ @param[in] FwCfgResource A pointer to firmware configure resource.
+
+ @retval NULL
+**/
+VOID
+QemuBuildFwCfgResourceHob (
+ IN QEMU_FW_CFG_RESOURCE *FwCfgResource
+ );
+
+/**
+ Get firmware configure resource HOB.
+
+ @param VOID
+
+ @retval FwCfgResource The firmware configure resouce in HOB.
+**/
+QEMU_FW_CFG_RESOURCE *
+QemuGetFwCfgResourceHob (
+ VOID
+ );
+
+/**
+ To get firmware configure selector address.
+
+ @param VOID
+
+ @retval firmware configure selector address
+**/
+UINTN
+EFIAPI
+QemuGetFwCfgSelectorAddress (
+ VOID
+ );
+
+/**
+ To get firmware configure Data address.
+
+ @param VOID
+
+ @retval firmware configure data address
+**/
+UINTN
+EFIAPI
+QemuGetFwCfgDataAddress (
+ VOID
+ );
+
+/**
+ To get firmware DMA address.
+
+ @param VOID
+
+ @retval firmware DMA address
+**/
+UINTN
+EFIAPI
+QemuGetFwCfgDmaAddress (
+ VOID
+ );
+
+/**
Slow READ_BYTES_FUNCTION.
**/
VOID
diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgMmioDxe.c b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgMmioDxe.c
index 0536253845..c9744ae5d7 100644
--- a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgMmioDxe.c
+++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgMmioDxe.c
@@ -5,6 +5,7 @@
Copyright (C) 2013 - 2014, Red Hat, Inc.
Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+ Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -20,9 +21,57 @@
#include "QemuFwCfgLibMmioInternal.h"
-UINTN mFwCfgSelectorAddress;
-UINTN mFwCfgDataAddress;
-UINTN mFwCfgDmaAddress;
+STATIC UINTN mFwCfgSelectorAddress;
+STATIC UINTN mFwCfgDataAddress;
+STATIC UINTN mFwCfgDmaAddress;
+
+/**
+ To get firmware configure selector address.
+
+ @param VOID
+
+ @retval firmware configure selector address
+**/
+UINTN
+EFIAPI
+QemuGetFwCfgSelectorAddress (
+ VOID
+ )
+{
+ return mFwCfgSelectorAddress;
+}
+
+/**
+ To get firmware configure Data address.
+
+ @param VOID
+
+ @retval firmware configure data address
+**/
+UINTN
+EFIAPI
+QemuGetFwCfgDataAddress (
+ VOID
+ )
+{
+ return mFwCfgDataAddress;
+}
+
+/**
+ To get firmware DMA address.
+
+ @param VOID
+
+ @retval firmware DMA address
+**/
+UINTN
+EFIAPI
+QemuGetFwCfgDmaAddress (
+ VOID
+ )
+{
+ return mFwCfgDmaAddress;
+}
RETURN_STATUS
EFIAPI
@@ -30,17 +79,37 @@ QemuFwCfgInitialize (
VOID
)
{
- EFI_STATUS Status;
- FDT_CLIENT_PROTOCOL *FdtClient;
- CONST UINT64 *Reg;
- UINT32 RegSize;
- UINTN AddressCells, SizeCells;
- UINT64 FwCfgSelectorAddress;
- UINT64 FwCfgSelectorSize;
- UINT64 FwCfgDataAddress;
- UINT64 FwCfgDataSize;
- UINT64 FwCfgDmaAddress;
- UINT64 FwCfgDmaSize;
+ EFI_STATUS Status;
+ FDT_CLIENT_PROTOCOL *FdtClient;
+ CONST UINT64 *Reg;
+ UINT32 RegSize;
+ UINTN AddressCells, SizeCells;
+ UINT64 FwCfgSelectorAddress;
+ UINT64 FwCfgSelectorSize;
+ UINT64 FwCfgDataAddress;
+ UINT64 FwCfgDataSize;
+ UINT64 FwCfgDmaAddress;
+ UINT64 FwCfgDmaSize;
+ QEMU_FW_CFG_RESOURCE *FwCfgResource;
+
+ //
+ // Check whether the Qemu firmware configure resources HOB has been created,
+ // if so use the resources in the HOB.
+ //
+ FwCfgResource = QemuGetFwCfgResourceHob ();
+ if (FwCfgResource != NULL) {
+ mFwCfgSelectorAddress = FwCfgResource->FwCfgSelectorAddress;
+ mFwCfgDataAddress = FwCfgResource->FwCfgDataAddress;
+ mFwCfgDmaAddress = FwCfgResource->FwCfgDmaAddress;
+
+ if (mFwCfgDmaAddress != 0) {
+ InternalQemuFwCfgReadBytes = DmaReadBytes;
+ InternalQemuFwCfgWriteBytes = DmaWriteBytes;
+ InternalQemuFwCfgSkipBytes = DmaSkipBytes;
+ }
+
+ return RETURN_SUCCESS;
+ }
Status = gBS->LocateProtocol (
&gFdtClientProtocolGuid,
generated by cgit (git 2.34.1) at 2025-02-23 05:53:45 +0000