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CorebootPayloadPkg: Use SerialDxe in MdeModulePkg 

1. Update fdf and dsc to use SerialDxe in MdeModulePkg.
2. Separate the code that gets SerialRegBase and SerialRegAccessType
   by CbParseLib from CorebootPayloadPkg/Library/SerialPortLib to
   PlatformHookLib, and then leverage BaseSerialPortLib16550 in
   MdeModulePkg.
3. Remove CorebootPayloadPkg/SerialDxe and
   CorebootPayloadPkg/Library/SerialPortLib.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Prince Agyeman <prince.agyeman@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Maurice Ma <maurice.ma@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18968 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Star Zeng 2015-11-26 08:49:26 +00:00 committed by lzeng14
parent 9fffd8e204
commit bae5ddc057
9 changed files with 92 additions and 794 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
CorebootPayloadPkg/CorebootPayloadPkg.fdf
View File

@ -3,7 +3,7 @@
#
# Provides drivers and definitions to create uefi payload for coreboot.
#
# Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials are licensed and made available under
# the terms and conditions of the BSD License that accompanies this distribution.
# The full text of the license may be found at
@ -116,7 +116,7 @@ INF DuetPkg/PciBusNoEnumerationDxe/PciBusNoEnumeration.inf
#
# ISA Support
#
INF CorebootPayloadPkg/SerialDxe/SerialDxe.inf
INF MdeModulePkg/Universal/SerialDxe/SerialDxe.inf
#
# Console Support

11
CorebootPayloadPkg/CorebootPayloadPkgIa32.dsc
View File

@ -3,7 +3,7 @@
#
# Provides drivers and definitions to create uefi payload for coreboot.
#
# Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials are licensed and made available under
# the terms and conditions of the BSD License that accompanies this distribution.
# The full text of the license may be found at
@ -116,7 +116,8 @@
#
TimerLib|CorebootPayloadPkg/Library/AcpiTimerLib/AcpiTimerLib.inf
ResetSystemLib|CorebootPayloadPkg/Library/ResetSystemLib/ResetSystemLib.inf
SerialPortLib|CorebootPayloadPkg/Library/SerialPortLib/SerialPortLib.inf
SerialPortLib|MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
PlatformHookLib|CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf
PlatformBdsLib|CorebootPayloadPkg/Library/PlatformBdsLib/PlatformBdsLib.inf
#
@ -214,6 +215,10 @@
gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugLoadImageMethod|0x2
!endif
[PcdsPatchableInModule.common]
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialUseMmio|FALSE
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterBase|0x03F8
################################################################################
#
# Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
@ -340,7 +345,7 @@
#
# ISA Support
#
CorebootPayloadPkg/SerialDxe/SerialDxe.inf
MdeModulePkg/Universal/SerialDxe/SerialDxe.inf
#
# Console Support

11
CorebootPayloadPkg/CorebootPayloadPkgIa32X64.dsc
View File

@ -3,7 +3,7 @@
#
# Provides drivers and definitions to create uefi payload for coreboot.
#
# Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials are licensed and made available under
# the terms and conditions of the BSD License that accompanies this distribution.
# The full text of the license may be found at
@ -116,7 +116,8 @@
#
TimerLib|CorebootPayloadPkg/Library/AcpiTimerLib/AcpiTimerLib.inf
ResetSystemLib|CorebootPayloadPkg/Library/ResetSystemLib/ResetSystemLib.inf
SerialPortLib|CorebootPayloadPkg/Library/SerialPortLib/SerialPortLib.inf
SerialPortLib|MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf
PlatformHookLib|CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf
PlatformBdsLib|CorebootPayloadPkg/Library/PlatformBdsLib/PlatformBdsLib.inf
#
@ -216,6 +217,10 @@
gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugLoadImageMethod|0x2
!endif
[PcdsPatchableInModule.common]
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialUseMmio|FALSE
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterBase|0x03F8
################################################################################
#
# Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
@ -342,7 +347,7 @@
#
# ISA Support
#
CorebootPayloadPkg/SerialDxe/SerialDxe.inf
MdeModulePkg/Universal/SerialDxe/SerialDxe.inf
#
# Console Support

5
CorebootPayloadPkg/Library/PlatformBdsLib/BdsPlatform.h
View File

@ -1,7 +1,7 @@
/** @file
Head file for BDS Platform specific code
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@ -29,7 +29,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include <Library/DevicePathLib.h>
#include <Protocol/PciIo.h>
#include <Protocol/SerialIo.h>
#include <Guid/GlobalVariable.h>
extern BDS_CONSOLE_CONNECT_ENTRY gPlatformConsole[];
@ -94,7 +93,7 @@ extern VENDOR_DEVICE_PATH gUartDeviceVenderNode;
(UINT8) ((sizeof (VENDOR_DEVICE_PATH)) >> 8) \
} \
}, \
EFI_SERIAL_IO_PROTOCOL_GUID \
{0xD3987D4B, 0x971A, 0x435F, {0x8C, 0xAF, 0x49, 0x67, 0xEB, 0x62, 0x72, 0x41}} \
}
#define gUart \

56
CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.c Normal file
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@ -0,0 +1,56 @@
/** @file
Platform Hook Library instance for UART device upon coreboot.
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Base.h>
#include <Uefi/UefiBaseType.h>
#include <Library/PlatformHookLib.h>
#include <Library/CbParseLib.h>
#include <Library/PcdLib.h>
/**
Performs platform specific initialization required for the CPU to access
the hardware associated with a SerialPortLib instance. This function does
not intiailzie the serial port hardware itself. Instead, it initializes
hardware devices that are required for the CPU to access the serial port
hardware. This function may be called more than once.
@retval RETURN_SUCCESS The platform specific initialization succeeded.
@retval RETURN_DEVICE_ERROR The platform specific initialization could not be completed.
**/
RETURN_STATUS
EFIAPI
PlatformHookSerialPortInitialize (
VOID
)
{
RETURN_STATUS Status;
UINT32 SerialRegBase;
UINT32 SerialRegAccessType;
Status = CbParseSerialInfo (&SerialRegBase, &SerialRegAccessType, NULL);
if (RETURN_ERROR (Status)) {
return Status;
}
if (SerialRegAccessType == 2) { //MMIO
PcdSetBoolS (PcdSerialUseMmio, TRUE);
} else { //IO
PcdSetBoolS (PcdSerialUseMmio, FALSE);
}
PcdSet64S (PcdSerialRegisterBase, (UINT64) SerialRegBase);
return RETURN_SUCCESS;
}

36
CorebootPayloadPkg/Library/SerialPortLib/SerialPortLib.inf → CorebootPayloadPkg/Library/PlatformHookLib/PlatformHookLib.inf
View File

@ -1,12 +1,12 @@
## @file
# SerialPortLib instance for UART device upon coreboot
# Platform Hook Library instance for UART device upon coreboot.
#
# Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
#
# Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
@ -14,29 +14,25 @@
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = SerialPortLib
BASE_NAME = PlatformHookLib
FILE_GUID = 40A2CBC6-CFB8-447b-A90E-198E88FD345E
MODULE_TYPE = BASE
VERSION_STRING = 1.0
LIBRARY_CLASS = SerialPortLib
CONSTRUCTOR = SerialPortInitialize
LIBRARY_CLASS = PlatformHookLib
[Sources]
SerialPortLib.c
PlatformHookLib.c
[LibraryClasses]
CbParseLib
PcdLib
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
CorebootModulePkg/CorebootModulePkg.dec
[LibraryClasses]
BaseLib
PcdLib
IoLib
CbParseLib
[Pcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialBaudRate
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialLineControl
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialFifoControl
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialUseMmio ## PRODUCES
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterBase ## PRODUCES

316
CorebootPayloadPkg/Library/SerialPortLib/SerialPortLib.c
View File

@ -1,316 +0,0 @@
/** @file
SerialPortLib instance for UART device upon coreboot
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Uefi/UefiBaseType.h>
#include <Library/SerialPortLib.h>
#include <Library/PcdLib.h>
#include <Library/IoLib.h>
#include <Library/CbParseLib.h>
//
// 16550 UART register offsets and bitfields
//
#define R_UART_RXBUF 0
#define R_UART_TXBUF 0
#define R_UART_BAUD_LOW 0
#define R_UART_BAUD_HIGH 1
#define R_UART_FCR 2
#define B_UART_FCR_FIFOE BIT0
#define B_UART_FCR_FIFO64 BIT5
#define R_UART_LCR 3
#define B_UART_LCR_DLAB BIT7
#define R_UART_MCR 4
#define B_UART_MCR_RTS BIT1
#define R_UART_LSR 5
#define B_UART_LSR_RXRDY BIT0
#define B_UART_LSR_TXRDY BIT5
#define B_UART_LSR_TEMT BIT6
#define R_UART_MSR 6
#define B_UART_MSR_CTS BIT4
#define B_UART_MSR_DSR BIT5
UINT32 mSerialRegBase = 0;
UINT32 mSerialRegAccessType = 0;
/**
Read an 8-bit 16550 register. If PcdSerialUseMmio is TRUE, then the value is read from
MMIO space. If PcdSerialUseMmio is FALSE, then the value is read from I/O space. The
parameter Offset is added to the base address of the 16550 registers that is specified
by PcdSerialRegisterBase.
@param Offset The offset of the 16550 register to read.
@return The value read from the 16550 register.
**/
UINT8
SerialPortReadRegister (
UINTN Offset
)
{
if (mSerialRegAccessType == 2) { //MMIO
return MmioRead8 (mSerialRegBase + Offset);
} else { //IO
return IoRead8 ((UINT16)mSerialRegBase + Offset);
}
}
/**
Write an 8-bit 16550 register. If PcdSerialUseMmio is TRUE, then the value is written to
MMIO space. If PcdSerialUseMmio is FALSE, then the value is written to I/O space. The
parameter Offset is added to the base address of the 16550 registers that is specified
by PcdSerialRegisterBase.
@param Offset The offset of the 16550 register to write.
@param Value The value to write to the 16550 register specified by Offset.
@return The value written to the 16550 register.
**/
UINT8
SerialPortWriteRegister (
UINTN Offset,
UINT8 Value
)
{
if (mSerialRegAccessType == 2) { //MMIO
return MmioWrite8 (mSerialRegBase + Offset, Value);
} else {// IO
return IoWrite8 ((UINT16)mSerialRegBase + Offset, Value);
}
}
/**
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_STATUS Status;
UINTN Divisor;
BOOLEAN Initialized;
Status = CbParseSerialInfo (&mSerialRegBase, &mSerialRegAccessType, NULL);
if (RETURN_ERROR (Status)) {
return Status;
}
//
// See if the serial port is already initialized
//
Initialized = TRUE;
if ((SerialPortReadRegister (R_UART_FCR) & (B_UART_FCR_FIFOE | B_UART_FCR_FIFO64)) !=
(PcdGet8 (PcdSerialFifoControl) & (B_UART_FCR_FIFOE | B_UART_FCR_FIFO64)) ) {
Initialized = FALSE;
}
if ((SerialPortReadRegister (R_UART_LCR) & 0x3F) != (PcdGet8 (PcdSerialLineControl) & 0x3F)) {
Initialized = FALSE;
}
SerialPortWriteRegister (R_UART_LCR, (UINT8)(SerialPortReadRegister (R_UART_LCR) | B_UART_LCR_DLAB));
Divisor = SerialPortReadRegister (R_UART_BAUD_HIGH) << 8;
Divisor |= SerialPortReadRegister (R_UART_BAUD_LOW);
SerialPortWriteRegister (R_UART_LCR, (UINT8)(SerialPortReadRegister (R_UART_LCR) & ~B_UART_LCR_DLAB));
if (Divisor != 115200 / PcdGet32 (PcdSerialBaudRate)) {
Initialized = FALSE;
}
if (Initialized) {
return RETURN_SUCCESS;
}
//
// Configure baud rate
//
Divisor = 115200 / PcdGet32 (PcdSerialBaudRate);
SerialPortWriteRegister (R_UART_LCR, B_UART_LCR_DLAB);
SerialPortWriteRegister (R_UART_BAUD_HIGH, (UINT8) (Divisor >> 8));
SerialPortWriteRegister (R_UART_BAUD_LOW, (UINT8) (Divisor & 0xff));
//
// Clear DLAB and configure Data Bits, Parity, and Stop Bits.
// Strip reserved bits from PcdSerialLineControl
//
SerialPortWriteRegister (R_UART_LCR, (UINT8)(PcdGet8 (PcdSerialLineControl) & 0x3F));
//
// Enable and reset FIFOs
// Strip reserved bits from PcdSerialFifoControl
//
SerialPortWriteRegister (R_UART_FCR, (UINT8)(PcdGet8 (PcdSerialFifoControl) & 0x27));
//
// Put Modem Control Register(MCR) into its reset state of 0x00.
//
SerialPortWriteRegister (R_UART_MCR, 0x00);
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 Pointer to the data buffer to be written.
@param NumberOfBytes 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
)
{
UINTN Result;
UINTN Index;
UINTN FifoSize;
if (Buffer == NULL) {
return 0;
}
if (NumberOfBytes == 0) {
//
// Flush the hardware
//
//
// Wait for both the transmit FIFO and shift register empty.
//
while ((SerialPortReadRegister (R_UART_LSR) & B_UART_LSR_TEMT) == 0);
return 0;
}
//
// Compute the maximum size of the Tx FIFO
//
FifoSize = 1;
if ((PcdGet8 (PcdSerialFifoControl) & B_UART_FCR_FIFOE) != 0) {
if ((PcdGet8 (PcdSerialFifoControl) & B_UART_FCR_FIFO64) == 0) {
FifoSize = 16;
} else {
FifoSize = 64;
}
}
Result = NumberOfBytes;
while (NumberOfBytes != 0) {
//
// Wait for the serial port to be ready, to make sure both the transmit FIFO
// and shift register empty.
//
while ((SerialPortReadRegister (R_UART_LSR) & B_UART_LSR_TEMT) == 0);
//
// Fill then entire Tx FIFO
//
for (Index = 0; Index < FifoSize && NumberOfBytes != 0; Index++, NumberOfBytes--, Buffer++) {
//
// Write byte to the transmit buffer.
//
SerialPortWriteRegister (R_UART_TXBUF, *Buffer);
}
}
return Result;
}
/**
Reads data from a serial device into a buffer.
@param Buffer Pointer to the data buffer to store the data read from the serial device.
@param NumberOfBytes Number of bytes to read from the serial device.
@retval 0 NumberOfBytes is 0.
@retval >0 The number of bytes read from the serial device.
If this value is less than NumberOfBytes, then the read operation failed.
**/
UINTN
EFIAPI
SerialPortRead (
OUT UINT8 *Buffer,
IN UINTN NumberOfBytes
)
{
UINTN Result;
if (NULL == Buffer) {
return 0;
}
for (Result = 0; NumberOfBytes-- != 0; Result++, Buffer++) {
//
// Wait for the serial port to have some data.
//
while ((SerialPortReadRegister (R_UART_LSR) & B_UART_LSR_RXRDY) == 0);
//
// Read byte from the receive buffer.
//
*Buffer = SerialPortReadRegister (R_UART_RXBUF);
}
return Result;
}
/**
Polls a serial device to see if there is any data waiting to be read.
Polls aserial 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
)
{
//
// Read the serial port status
//
if ((SerialPortReadRegister (R_UART_LSR) & B_UART_LSR_RXRDY) != 0) {
return TRUE;
}
return FALSE;
}

55
CorebootPayloadPkg/SerialDxe/SerialDxe.inf
View File

@ -1,55 +0,0 @@
#/** @file
#
# Convert SerialLib into SerialIo protocol
#
# Copyright (c) 2008 - 2014, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#**/
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = SerialDxe
FILE_GUID = D3987D4B-971A-435F-8CAF-4967EB627241
MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
ENTRY_POINT = SerialDxeInitialize
[Sources.common]
SerialIo.c
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
[LibraryClasses]
BaseLib
ReportStatusCodeLib
MemoryAllocationLib
UefiLib
UefiBootServicesTableLib
BaseMemoryLib
DebugLib
UefiDriverEntryPoint
SerialPortLib
[Protocols]
gEfiSerialIoProtocolGuid
gEfiDevicePathProtocolGuid
[FixedPcd]
gEfiMdePkgTokenSpaceGuid.PcdUartDefaultBaudRate
gEfiMdePkgTokenSpaceGuid.PcdUartDefaultDataBits
gEfiMdePkgTokenSpaceGuid.PcdUartDefaultParity
gEfiMdePkgTokenSpaceGuid.PcdUartDefaultStopBits
[Depex]
TRUE

392
CorebootPayloadPkg/SerialDxe/SerialIo.c
View File

@ -1,392 +0,0 @@
/** @file
Serial IO Abstraction for GDB stub. This allows an EFI consoles that shows up on the system
running GDB. One console for error information and another console for user input/output.
Basic packet format is $packet-data#checksum. So every command has 4 bytes of overhead: $,
#, 0, 0. The 0 and 0 are the ascii characters for the checksum.
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Copyright (c) 2013, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiDxe.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Library/SerialPortLib.h>
#include <Library/PcdLib.h>
#include <Protocol/SerialIo.h>
typedef struct {
VENDOR_DEVICE_PATH Guid;
UART_DEVICE_PATH Uart;
EFI_DEVICE_PATH_PROTOCOL End;
} SIMPLE_TEXT_OUT_DEVICE_PATH;
SIMPLE_TEXT_OUT_DEVICE_PATH mDevicePath = {
{
{ HARDWARE_DEVICE_PATH, HW_VENDOR_DP, { sizeof (VENDOR_DEVICE_PATH), 0} },
EFI_SERIAL_IO_PROTOCOL_GUID // Use the drivers GUID
},
{
{ MESSAGING_DEVICE_PATH, MSG_UART_DP, { sizeof (UART_DEVICE_PATH), 0} },
0, // Reserved
FixedPcdGet64 (PcdUartDefaultBaudRate), // BaudRate
FixedPcdGet8 (PcdUartDefaultDataBits), // DataBits
FixedPcdGet8 (PcdUartDefaultParity), // Parity (N)
FixedPcdGet8 (PcdUartDefaultStopBits) // StopBits
},
{ END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 } }
};
EFI_HANDLE gHandle = NULL;
/**
Reset the serial device.
@param This Protocol instance pointer.
@retval EFI_SUCCESS The device was reset.
@retval EFI_DEVICE_ERROR The serial device could not be reset.
**/
EFI_STATUS
EFIAPI
SerialReset (
IN EFI_SERIAL_IO_PROTOCOL *This
)
{
EFI_STATUS Status;
EFI_TPL Tpl;
Status = SerialPortInitialize ();
if (EFI_ERROR(Status)) {
return Status;
}
//
// Set the Serial I/O mode and update the device path
//
Tpl = gBS->RaiseTPL (TPL_NOTIFY);
//
// Set the Serial I/O mode
//
This->Mode->ReceiveFifoDepth = 0;
This->Mode->Timeout = 1000000;
This->Mode->BaudRate = PcdGet64 (PcdUartDefaultBaudRate);
This->Mode->DataBits = (UINT32)PcdGet8 (PcdUartDefaultDataBits);
This->Mode->Parity = (UINT32)PcdGet8 (PcdUartDefaultParity);
This->Mode->StopBits = (UINT32)PcdGet8 (PcdUartDefaultStopBits);
//
// Check if the device path has actually changed
//
if (mDevicePath.Uart.BaudRate == This->Mode->BaudRate &&
mDevicePath.Uart.DataBits == (UINT8)This->Mode->DataBits &&
mDevicePath.Uart.Parity == (UINT8)This->Mode->Parity &&
mDevicePath.Uart.StopBits == (UINT8)This->Mode->StopBits
) {
gBS->RestoreTPL (Tpl);
return EFI_SUCCESS;
}
//
// Update the device path
//
mDevicePath.Uart.BaudRate = This->Mode->BaudRate;
mDevicePath.Uart.DataBits = (UINT8)This->Mode->DataBits;
mDevicePath.Uart.Parity = (UINT8)This->Mode->Parity;
mDevicePath.Uart.StopBits = (UINT8)This->Mode->StopBits;
Status = gBS->ReinstallProtocolInterface (
gHandle,
&gEfiDevicePathProtocolGuid,
&mDevicePath,
&mDevicePath
);
gBS->RestoreTPL (Tpl);
return Status;
}
/**
Sets the baud rate, receive FIFO depth, transmit/receive time out, parity,
data buts, and stop bits on a serial device.
@param This Protocol instance pointer.
@param BaudRate The requested baud rate. A BaudRate value of 0 will use the the
device's default interface speed.
@param ReceiveFifoDepth The requested depth of the FIFO on the receive side of the
serial interface. A ReceiveFifoDepth value of 0 will use
the device's default FIFO depth.
@param Timeout The requested time out for a single character in microseconds.
This timeout applies to both the transmit and receive side of the
interface. A Timeout value of 0 will use the device's default time
out value.
@param Parity The type of parity to use on this serial device. A Parity value of
DefaultParity will use the device's default parity value.
@param DataBits The number of data bits to use on the serial device. A DataBits
value of 0 will use the device's default data bit setting.
@param StopBits The number of stop bits to use on this serial device. A StopBits
value of DefaultStopBits will use the device's default number of
stop bits.
@retval EFI_SUCCESS The device was reset.
@retval EFI_DEVICE_ERROR The serial device could not be reset.
**/
EFI_STATUS
EFIAPI
SerialSetAttributes (
IN EFI_SERIAL_IO_PROTOCOL *This,
IN UINT64 BaudRate,
IN UINT32 ReceiveFifoDepth,
IN UINT32 Timeout,
IN EFI_PARITY_TYPE Parity,
IN UINT8 DataBits,
IN EFI_STOP_BITS_TYPE StopBits
)
{
EFI_STATUS Status;
EFI_TPL Tpl;
//
// Set the Serial I/O mode and update the device path
//
Tpl = gBS->RaiseTPL (TPL_NOTIFY);
//
// Set the Serial I/O mode
//
This->Mode->BaudRate = BaudRate;
This->Mode->ReceiveFifoDepth = ReceiveFifoDepth;
This->Mode->Timeout = Timeout;
This->Mode->Parity = (UINT32)Parity;
This->Mode->DataBits = (UINT32)DataBits;
This->Mode->StopBits = (UINT32)StopBits;
//
// Check if the device path has actually changed
//
if (mDevicePath.Uart.BaudRate == BaudRate &&
mDevicePath.Uart.Parity == (UINT8)Parity &&
mDevicePath.Uart.DataBits == DataBits &&
mDevicePath.Uart.StopBits == (UINT8)StopBits
) {
gBS->RestoreTPL (Tpl);
return EFI_SUCCESS;
}
//
// Update the device path
//
mDevicePath.Uart.BaudRate = BaudRate;
mDevicePath.Uart.DataBits = DataBits;
mDevicePath.Uart.Parity = (UINT8) Parity;
mDevicePath.Uart.StopBits = (UINT8) StopBits;
Status = gBS->ReinstallProtocolInterface (
gHandle,
&gEfiDevicePathProtocolGuid,
&mDevicePath,
&mDevicePath
);
gBS->RestoreTPL (Tpl);
return Status;
}
/**
Set the control bits on a serial device
@param This Protocol instance pointer.
@param Control Set the bits of Control that are settable.
@retval EFI_SUCCESS The new control bits were set on the serial device.
@retval EFI_UNSUPPORTED The serial device does not support this operation.
@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
**/
EFI_STATUS
EFIAPI
SerialSetControl (
IN EFI_SERIAL_IO_PROTOCOL *This,
IN UINT32 Control
)
{
return EFI_UNSUPPORTED;
}
/**
Retrieves the status of the control bits on a serial device
@param This Protocol instance pointer.
@param Control A pointer to return the current Control signals from the serial device.
@retval EFI_SUCCESS The control bits were read from the serial device.
@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
**/
EFI_STATUS
EFIAPI
SerialGetControl (
IN EFI_SERIAL_IO_PROTOCOL *This,
OUT UINT32 *Control
)
{
if (SerialPortPoll ()) {
// If a character is pending don't set EFI_SERIAL_INPUT_BUFFER_EMPTY
*Control = EFI_SERIAL_OUTPUT_BUFFER_EMPTY;
} else {
*Control = EFI_SERIAL_INPUT_BUFFER_EMPTY | EFI_SERIAL_OUTPUT_BUFFER_EMPTY;
}
return EFI_SUCCESS;
}
/**
Writes data to a serial device.
@param This Protocol instance pointer.
@param BufferSize On input, the size of the Buffer. On output, the amount of
data actually written.
@param Buffer The buffer of data to write
@retval EFI_SUCCESS The data was written.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_TIMEOUT The data write was stopped due to a timeout.
**/
EFI_STATUS
EFIAPI
SerialWrite (
IN EFI_SERIAL_IO_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
)
{
UINTN Count;
Count = SerialPortWrite (Buffer, *BufferSize);
if (Count != *BufferSize) {
*BufferSize = Count;
return EFI_TIMEOUT;
}
return EFI_SUCCESS;
}
/**
Reads data from a serial device.
@param This Protocol instance pointer.
@param BufferSize On input, the size of the Buffer. On output, the amount of
data returned in Buffer.
@param Buffer The buffer to return the data into.
@retval EFI_SUCCESS The data was read.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_TIMEOUT The data write was stopped due to a timeout.
**/
EFI_STATUS
EFIAPI
SerialRead (
IN EFI_SERIAL_IO_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
UINTN Count = 0;
if (SerialPortPoll()) {
Count = SerialPortRead (Buffer, *BufferSize);
}
if (Count != *BufferSize) {
*BufferSize = Count;
return EFI_TIMEOUT;
}
return EFI_SUCCESS;
}
//
// Template used to initialize the GDB Serial IO protocols
//
EFI_SERIAL_IO_MODE gSerialIoMode = {
0, // ControlMask
0, // Timeout
FixedPcdGet64 (PcdUartDefaultBaudRate), // BaudRate
1, // ReceiveFifoDepth
FixedPcdGet8 (PcdUartDefaultDataBits), // DataBits
FixedPcdGet8 (PcdUartDefaultParity), // Parity
FixedPcdGet8 (PcdUartDefaultStopBits) // StopBits
};
EFI_SERIAL_IO_PROTOCOL gSerialIoTemplate = {
SERIAL_IO_INTERFACE_REVISION,
SerialReset,
SerialSetAttributes,
SerialSetControl,
SerialGetControl,
SerialWrite,
SerialRead,
&gSerialIoMode
};
/**
Initialize the state information for the Serial Io Protocol
@param ImageHandle of the loaded driver
@param SystemTable Pointer to the System Table
@retval EFI_SUCCESS Protocol registered
@retval EFI_OUT_OF_RESOURCES Cannot allocate protocol data structure
@retval EFI_DEVICE_ERROR Hardware problems
**/
EFI_STATUS
EFIAPI
SerialDxeInitialize (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
// Make a new handle with Serial IO protocol and its device path on it.
Status = gBS->InstallMultipleProtocolInterfaces (
&gHandle,
&gEfiSerialIoProtocolGuid, &gSerialIoTemplate,
&gEfiDevicePathProtocolGuid, &mDevicePath,
NULL
);
ASSERT_EFI_ERROR (Status);
return Status;
}