OvmfPkg/MemEncryptSevLib: find pages of initial SMRAM save state map

[mirror_edk2.git] / OvmfPkg / Library / QemuFwCfgLib / QemuFwCfgLib.c

diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c
index d79d0a444ca714d7fd5832990772e7c77e693d4c..7f42f38d1c05cca65225e962b5d530dd01a1daed 100644 (file)
--- a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c
+++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c
@@ -45,78 +45,6 @@ QemuFwCfgSelectItem (
   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
@@ -368,31 +296,3 @@ QemuFwCfgFindFile (
 \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