Copyright (C) 2013, Red Hat, Inc.\r
Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>\r
\r
- This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+ SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
\r
#include "QemuFwCfgLibInternal.h"\r
\r
-\r
/**\r
Selects a firmware configuration item for reading.\r
- \r
+\r
Following this call, any data read from this item will start from\r
the beginning of the configuration item's data.\r
\r
VOID\r
EFIAPI\r
QemuFwCfgSelectItem (\r
- IN FIRMWARE_CONFIG_ITEM QemuFwCfgItem\r
+ IN FIRMWARE_CONFIG_ITEM QemuFwCfgItem\r
)\r
{\r
- DEBUG ((EFI_D_INFO, "Select Item: 0x%x\n", (UINT16)(UINTN) QemuFwCfgItem));\r
- IoWrite16 (FW_CFG_IO_SELECTOR, (UINT16)(UINTN) QemuFwCfgItem);\r
+ DEBUG ((DEBUG_INFO, "Select Item: 0x%x\n", (UINT16)(UINTN)QemuFwCfgItem));\r
+ IoWrite16 (FW_CFG_IO_SELECTOR, (UINT16)(UINTN)QemuFwCfgItem);\r
}\r
\r
-\r
-/**\r
- Transfer an array of bytes, or skip a number of bytes, using the DMA\r
- interface.\r
-\r
- @param[in] Size Size in bytes to transfer or skip.\r
-\r
- @param[in,out] Buffer Buffer to read data into or write data from. Ignored,\r
- and may be NULL, if Size is zero, or Control is\r
- FW_CFG_DMA_CTL_SKIP.\r
-\r
- @param[in] Control One of the following:\r
- FW_CFG_DMA_CTL_WRITE - write to fw_cfg from Buffer.\r
- FW_CFG_DMA_CTL_READ - read from fw_cfg into Buffer.\r
- FW_CFG_DMA_CTL_SKIP - skip bytes in fw_cfg.\r
-**/\r
-VOID\r
-InternalQemuFwCfgDmaBytes (\r
- IN UINT32 Size,\r
- IN OUT VOID *Buffer OPTIONAL,\r
- IN UINT32 Control\r
- )\r
-{\r
- volatile FW_CFG_DMA_ACCESS Access;\r
- UINT32 AccessHigh, AccessLow;\r
- UINT32 Status;\r
-\r
- ASSERT (Control == FW_CFG_DMA_CTL_WRITE || Control == FW_CFG_DMA_CTL_READ ||\r
- Control == FW_CFG_DMA_CTL_SKIP);\r
-\r
- if (Size == 0) {\r
- return;\r
- }\r
-\r
- Access.Control = SwapBytes32 (Control);\r
- Access.Length = SwapBytes32 (Size);\r
- Access.Address = SwapBytes64 ((UINTN)Buffer);\r
-\r
- //\r
- // Delimit the transfer from (a) modifications to Access, (b) in case of a\r
- // write, from writes to Buffer by the caller.\r
- //\r
- MemoryFence ();\r
-\r
- //\r
- // Start the transfer.\r
- //\r
- AccessHigh = (UINT32)RShiftU64 ((UINTN)&Access, 32);\r
- AccessLow = (UINT32)(UINTN)&Access;\r
- IoWrite32 (0x514, SwapBytes32 (AccessHigh));\r
- IoWrite32 (0x518, SwapBytes32 (AccessLow));\r
-\r
- //\r
- // Don't look at Access.Control before starting the transfer.\r
- //\r
- MemoryFence ();\r
-\r
- //\r
- // Wait for the transfer to complete.\r
- //\r
- do {\r
- Status = SwapBytes32 (Access.Control);\r
- ASSERT ((Status & FW_CFG_DMA_CTL_ERROR) == 0);\r
- } while (Status != 0);\r
-\r
- //\r
- // After a read, the caller will want to use Buffer.\r
- //\r
- MemoryFence ();\r
-}\r
-\r
-\r
/**\r
Reads firmware configuration bytes into a buffer\r
\r
VOID\r
EFIAPI\r
InternalQemuFwCfgReadBytes (\r
- IN UINTN Size,\r
- IN VOID *Buffer OPTIONAL\r
+ IN UINTN Size,\r
+ IN VOID *Buffer OPTIONAL\r
)\r
{\r
- if (InternalQemuFwCfgDmaIsAvailable () && Size <= MAX_UINT32) {\r
+ if (InternalQemuFwCfgDmaIsAvailable () && (Size <= MAX_UINT32)) {\r
InternalQemuFwCfgDmaBytes ((UINT32)Size, Buffer, FW_CFG_DMA_CTL_READ);\r
return;\r
}\r
- IoReadFifo8 (0x511, Size, Buffer);\r
-}\r
\r
+ IoReadFifo8 (FW_CFG_IO_DATA, Size, Buffer);\r
+}\r
\r
/**\r
Reads firmware configuration bytes into a buffer\r
VOID\r
EFIAPI\r
QemuFwCfgReadBytes (\r
- IN UINTN Size,\r
- IN VOID *Buffer\r
+ IN UINTN Size,\r
+ IN VOID *Buffer\r
)\r
{\r
if (InternalQemuFwCfgIsAvailable ()) {\r
VOID\r
EFIAPI\r
QemuFwCfgWriteBytes (\r
- IN UINTN Size,\r
- IN VOID *Buffer\r
+ IN UINTN Size,\r
+ IN VOID *Buffer\r
)\r
{\r
if (InternalQemuFwCfgIsAvailable ()) {\r
- if (InternalQemuFwCfgDmaIsAvailable () && Size <= MAX_UINT32) {\r
+ if (InternalQemuFwCfgDmaIsAvailable () && (Size <= MAX_UINT32)) {\r
InternalQemuFwCfgDmaBytes ((UINT32)Size, Buffer, FW_CFG_DMA_CTL_WRITE);\r
return;\r
}\r
- IoWriteFifo8 (0x511, Size, Buffer);\r
+\r
+ IoWriteFifo8 (FW_CFG_IO_DATA, Size, Buffer);\r
}\r
}\r
\r
-\r
/**\r
Skip bytes in the firmware configuration item.\r
\r
VOID\r
EFIAPI\r
QemuFwCfgSkipBytes (\r
- IN UINTN Size\r
+ IN UINTN Size\r
)\r
{\r
- UINTN ChunkSize;\r
- UINT8 SkipBuffer[256];\r
+ UINTN ChunkSize;\r
+ UINT8 SkipBuffer[256];\r
\r
if (!InternalQemuFwCfgIsAvailable ()) {\r
return;\r
}\r
\r
- if (InternalQemuFwCfgDmaIsAvailable () && Size <= MAX_UINT32) {\r
+ if (InternalQemuFwCfgDmaIsAvailable () && (Size <= MAX_UINT32)) {\r
InternalQemuFwCfgDmaBytes ((UINT32)Size, NULL, FW_CFG_DMA_CTL_SKIP);\r
return;\r
}\r
//\r
while (Size > 0) {\r
ChunkSize = MIN (Size, sizeof SkipBuffer);\r
- IoReadFifo8 (0x511, ChunkSize, SkipBuffer);\r
+ IoReadFifo8 (FW_CFG_IO_DATA, ChunkSize, SkipBuffer);\r
Size -= ChunkSize;\r
}\r
}\r
\r
-\r
/**\r
Reads a UINT8 firmware configuration value\r
\r
VOID\r
)\r
{\r
- UINT8 Result;\r
+ UINT8 Result;\r
\r
QemuFwCfgReadBytes (sizeof (Result), &Result);\r
\r
return Result;\r
}\r
\r
-\r
/**\r
Reads a UINT16 firmware configuration value\r
\r
VOID\r
)\r
{\r
- UINT16 Result;\r
+ UINT16 Result;\r
\r
QemuFwCfgReadBytes (sizeof (Result), &Result);\r
\r
return Result;\r
}\r
\r
-\r
/**\r
Reads a UINT32 firmware configuration value\r
\r
VOID\r
)\r
{\r
- UINT32 Result;\r
+ UINT32 Result;\r
\r
QemuFwCfgReadBytes (sizeof (Result), &Result);\r
\r
return Result;\r
}\r
\r
-\r
/**\r
Reads a UINT64 firmware configuration value\r
\r
VOID\r
)\r
{\r
- UINT64 Result;\r
+ UINT64 Result;\r
\r
QemuFwCfgReadBytes (sizeof (Result), &Result);\r
\r
return Result;\r
}\r
\r
-\r
/**\r
Find the configuration item corresponding to the firmware configuration file.\r
\r
OUT UINTN *Size\r
)\r
{\r
- UINT32 Count;\r
- UINT32 Idx;\r
+ UINT32 Count;\r
+ UINT32 Idx;\r
\r
if (!InternalQemuFwCfgIsAvailable ()) {\r
return RETURN_UNSUPPORTED;\r
Count = SwapBytes32 (QemuFwCfgRead32 ());\r
\r
for (Idx = 0; Idx < Count; ++Idx) {\r
- UINT32 FileSize;\r
- UINT16 FileSelect;\r
- UINT16 FileReserved;\r
- CHAR8 FName[QEMU_FW_CFG_FNAME_SIZE];\r
+ UINT32 FileSize;\r
+ UINT16 FileSelect;\r
+ UINT16 FileReserved;\r
+ CHAR8 FName[QEMU_FW_CFG_FNAME_SIZE];\r
\r
FileSize = QemuFwCfgRead32 ();\r
FileSelect = QemuFwCfgRead16 ();\r
FileReserved = QemuFwCfgRead16 ();\r
- (VOID) FileReserved; /* Force a do-nothing reference. */\r
+ (VOID)FileReserved; /* Force a do-nothing reference. */\r
InternalQemuFwCfgReadBytes (sizeof (FName), FName);\r
\r
if (AsciiStrCmp (Name, FName) == 0) {\r
\r
return RETURN_NOT_FOUND;\r
}\r
-\r
-\r
-/**\r
- Determine if S3 support is explicitly enabled.\r
-\r
- @retval TRUE if S3 support is explicitly enabled.\r
- FALSE otherwise. This includes unavailability of the firmware\r
- configuration interface.\r
-**/\r
-BOOLEAN\r
-EFIAPI\r
-QemuFwCfgS3Enabled (\r
- VOID\r
- )\r
-{\r
- RETURN_STATUS Status;\r
- FIRMWARE_CONFIG_ITEM FwCfgItem;\r
- UINTN FwCfgSize;\r
- UINT8 SystemStates[6];\r
-\r
- Status = QemuFwCfgFindFile ("etc/system-states", &FwCfgItem, &FwCfgSize);\r
- if (Status != RETURN_SUCCESS || FwCfgSize != sizeof SystemStates) {\r
- return FALSE;\r
- }\r
- QemuFwCfgSelectItem (FwCfgItem);\r
- QemuFwCfgReadBytes (sizeof SystemStates, SystemStates);\r
- return (BOOLEAN) (SystemStates[3] & BIT7);\r
-}\r
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