X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=OvmfPkg%2FLibrary%2FQemuFwCfgLib%2FQemuFwCfgLib.c;h=7f42f38d1c05cca65225e962b5d530dd01a1daed;hp=d79d0a444ca714d7fd5832990772e7c77e693d4c;hb=61a044c6c15f5806a30ff23409ba5287d9d07163;hpb=509e6b5a034f0e121c6de9bedd08532bf54cc4f7

diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c
index d79d0a444c..7f42f38d1c 100644
--- 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);
 }
 
-
-/**
-  Transfer an array of bytes, or skip a number of bytes, using the DMA
-  interface.
-
-  @param[in]     Size     Size in bytes to transfer or skip.
-
-  @param[in,out] Buffer   Buffer to read data into or write data from. Ignored,
-                          and may be NULL, if Size is zero, or Control is
-                          FW_CFG_DMA_CTL_SKIP.
-
-  @param[in]     Control  One of the following:
-                          FW_CFG_DMA_CTL_WRITE - write to fw_cfg from Buffer.
-                          FW_CFG_DMA_CTL_READ  - read from fw_cfg into Buffer.
-                          FW_CFG_DMA_CTL_SKIP  - skip bytes in fw_cfg.
-**/
-VOID
-InternalQemuFwCfgDmaBytes (
-  IN     UINT32   Size,
-  IN OUT VOID     *Buffer OPTIONAL,
-  IN     UINT32   Control
-  )
-{
-  volatile FW_CFG_DMA_ACCESS Access;
-  UINT32                     AccessHigh, AccessLow;
-  UINT32                     Status;
-
-  ASSERT (Control == FW_CFG_DMA_CTL_WRITE || Control == FW_CFG_DMA_CTL_READ ||
-    Control == FW_CFG_DMA_CTL_SKIP);
-
-  if (Size == 0) {
-    return;
-  }
-
-  Access.Control = SwapBytes32 (Control);
-  Access.Length  = SwapBytes32 (Size);
-  Access.Address = SwapBytes64 ((UINTN)Buffer);
-
-  //
-  // Delimit the transfer from (a) modifications to Access, (b) in case of a
-  // write, from writes to Buffer by the caller.
-  //
-  MemoryFence ();
-
-  //
-  // Start the transfer.
-  //
-  AccessHigh = (UINT32)RShiftU64 ((UINTN)&Access, 32);
-  AccessLow  = (UINT32)(UINTN)&Access;
-  IoWrite32 (0x514, SwapBytes32 (AccessHigh));
-  IoWrite32 (0x518, SwapBytes32 (AccessLow));
-
-  //
-  // Don't look at Access.Control before starting the transfer.
-  //
-  MemoryFence ();
-
-  //
-  // Wait for the transfer to complete.
-  //
-  do {
-    Status = SwapBytes32 (Access.Control);
-    ASSERT ((Status & FW_CFG_DMA_CTL_ERROR) == 0);
-  } while (Status != 0);
-
-  //
-  // After a read, the caller will want to use Buffer.
-  //
-  MemoryFence ();
-}
-
-
 /**
   Reads firmware configuration bytes into a buffer
 
@@ -368,31 +296,3 @@ QemuFwCfgFindFile (
 
   return RETURN_NOT_FOUND;
 }
-
-
-/**
-  Determine if S3 support is explicitly enabled.
-
-  @retval  TRUE   if S3 support is explicitly enabled.
-           FALSE  otherwise. This includes unavailability of the firmware
-                  configuration interface.
-**/
-BOOLEAN
-EFIAPI
-QemuFwCfgS3Enabled (
-  VOID
-  )
-{
-  RETURN_STATUS        Status;
-  FIRMWARE_CONFIG_ITEM FwCfgItem;
-  UINTN                FwCfgSize;
-  UINT8                SystemStates[6];
-
-  Status = QemuFwCfgFindFile ("etc/system-states", &FwCfgItem, &FwCfgSize);
-  if (Status != RETURN_SUCCESS || FwCfgSize != sizeof SystemStates) {
-    return FALSE;
-  }
-  QemuFwCfgSelectItem (FwCfgItem);
-  QemuFwCfgReadBytes (sizeof SystemStates, SystemStates);
-  return (BOOLEAN) (SystemStates[3] & BIT7);
-}