mirror of https://github.com/acidanthera/audk.git
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/** @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
|
|
Status = PcdSetBoolS (PcdSerialUseMmio, TRUE);
|
|
} else { //IO
|
|
Status = PcdSetBoolS (PcdSerialUseMmio, FALSE);
|
|
}
|
|
if (RETURN_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
Status = PcdSet64S (PcdSerialRegisterBase, (UINT64) SerialRegBase);
|
|
if (RETURN_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|