diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c')
| -rw-r--r-- | roms/edk2/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/roms/edk2/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c b/roms/edk2/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c new file mode 100644 index 000000000..cf727a638 --- /dev/null +++ b/roms/edk2/EmulatorPkg/Library/PeiEmuSerialPortLib/PeiEmuSerialPortLib.c @@ -0,0 +1,133 @@ +/** @file
+ Serial Port Lib that thunks back to Emulator services to write to StdErr.
+ All read functions are stubed out. There is no constructor so this lib can
+ be linked with PEI Core.
+
+ Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+ Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+
+#include <PiPei.h>
+#include <Library/SerialPortLib.h>
+#include <Library/PeiServicesLib.h>
+
+#include <Ppi/EmuThunk.h>
+#include <Protocol/EmuThunk.h>
+
+
+
+/**
+ Initialize the serial device hardware.
+
+ If no initialization is required, then return RETURN_SUCCESS.
+ If the serial device was successfully initialized, then return RETURN_SUCCESS.
+ If the serial device could not be initialized, then return RETURN_DEVICE_ERROR.
+
+ @retval RETURN_SUCCESS The serial device was initialized.
+ @retval RETURN_DEVICE_ERROR The serial device could not be initialized.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortInitialize (
+ VOID
+ )
+{
+ return RETURN_SUCCESS;
+}
+
+/**
+ Write data from buffer to serial device.
+
+ Writes NumberOfBytes data bytes from Buffer to the serial device.
+ The number of bytes actually written to the serial device is returned.
+ If the return value is less than NumberOfBytes, then the write operation failed.
+ If Buffer is NULL, then ASSERT().
+ If NumberOfBytes is zero, then return 0.
+
+ @param Buffer The pointer to the data buffer to be written.
+ @param NumberOfBytes The number of bytes to written to the serial device.
+
+ @retval 0 NumberOfBytes is 0.
+ @retval >0 The number of bytes written to the serial device.
+ If this value is less than NumberOfBytes, then the read operation failed.
+
+**/
+UINTN
+EFIAPI
+SerialPortWrite (
+ IN UINT8 *Buffer,
+ IN UINTN NumberOfBytes
+ )
+{
+ EMU_THUNK_PPI *ThunkPpi;
+ EFI_STATUS Status;
+ EMU_THUNK_PROTOCOL *Thunk;
+
+ //
+ // Locate EmuThunkPpi for retrieving standard output handle
+ //
+ Status = PeiServicesLocatePpi (
+ &gEmuThunkPpiGuid,
+ 0,
+ NULL,
+ (VOID **) &ThunkPpi
+ );
+ if (!EFI_ERROR (Status)) {
+ Thunk = (EMU_THUNK_PROTOCOL *)ThunkPpi->Thunk ();
+ return Thunk->WriteStdErr (Buffer, NumberOfBytes);
+ }
+
+ return 0;
+}
+
+
+/**
+ Read data from serial device and save the datas in buffer.
+
+ Reads NumberOfBytes data bytes from a serial device into the buffer
+ specified by Buffer. The number of bytes actually read is returned.
+ If the return value is less than NumberOfBytes, then the rest operation failed.
+ If Buffer is NULL, then ASSERT().
+ If NumberOfBytes is zero, then return 0.
+
+ @param Buffer The pointer to the data buffer to store the data read from the serial device.
+ @param NumberOfBytes The number of bytes which will be read.
+
+ @retval 0 Read data failed; No data is to be read.
+ @retval >0 The actual number of bytes read from serial device.
+
+**/
+UINTN
+EFIAPI
+SerialPortRead (
+ OUT UINT8 *Buffer,
+ IN UINTN NumberOfBytes
+ )
+{
+ return 0;
+}
+
+/**
+ Polls a serial device to see if there is any data waiting to be read.
+
+ Polls a serial device to see if there is any data waiting to be read.
+ If there is data waiting to be read from the serial device, then TRUE is returned.
+ If there is no data waiting to be read from the serial device, then FALSE is returned.
+
+ @retval TRUE Data is waiting to be read from the serial device.
+ @retval FALSE There is no data waiting to be read from the serial device.
+
+**/
+BOOLEAN
+EFIAPI
+SerialPortPoll (
+ VOID
+ )
+{
+ return FALSE;
+}
+
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