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//*************************************************************************
//*************************************************************************
//** **
//** (C)Copyright 1985-2011, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//*************************************************************************
//*************************************************************************
//*************************************************************************
// $Header: /Alaska/BIN/Modules/Terminal/TerminalAcpi.c 1 12/22/11 1:34a Rajeshms $
//
// $Revision: 1 $
//
// $Date: 12/22/11 1:34a $
//*************************************************************************
// Revision History
// ----------------
// $Log: /Alaska/BIN/Modules/Terminal/TerminalAcpi.c $
//
// 1 12/22/11 1:34a Rajeshms
// [TAG] EIP57579
// [Category] Improvement
// [Description] PCI legacy console redirection causes Legacy OS
// installation slow because when Redirection is enabled for Legacy OS,
// Legacy Serial Redirection enables the PCI Serial interrupt for
// redirection and sometime after that OS uses its own IVT but still PCI
// Serial interrupt is generated and not handled.So, disable redirection
// at OS level. we disable redirection on ACPI enable/disable call and
// reset the Interrupt Enable Register so that interrupt is not generated.
// [Files] Terminal.sdl, Terminal.mak, Terminal.cif, TerminalAcpi.c
//
//
//*************************************************************************
//<AMI_FHDR_START>
//
// Name: TerminalAcpi.c
//
// Description: This file contains function to disable the PCI redirection
// at ACPI enable call.
//
//<AMI_FHDR_END>
//*************************************************************************
//----------------------------------------------------------------------------
// Include(s)
//----------------------------------------------------------------------------
#include <Token.h>
#include <AmiDxeLib.h>
#if defined(PI_SPECIFICATION_VERSION)&&(PI_SPECIFICATION_VERSION>=0x0001000A)
#include <Protocol\SmmSwDispatch2.h>
#define AMI_SMM_SW_DISPATCH_CONTEXT EFI_SMM_SW_REGISTER_CONTEXT
#else
#include <Protocol\SmmSwDispatch.h>
#define AMI_SMM_SW_DISPATCH_CONTEXT EFI_SMM_SW_DISPATCH_CONTEXT
#endif
#include "TerminalSetupVar.h"
#define CFG_SPACE_INDEX_REG 0xCF8
#define CFG_SPACE_DATA_REG 0xCFC
#define PCI_BAR0 0x0010
#define INT08h_SEGMENT 0xF000
#define INT08h_OFFSET 0xFEA5
//<AMI_PHDR_START>
//----------------------------------------------------------------------------
//
// Procedure: TerminalAcpiEnableDisableCallBack
//
// Description: This routine will be called to disable PCI redirection at ACPI
// enable/disable call and reset Interrupt Enable Register to
// disable interrupt from PCI Serial device & replace actual INT08h.
//
// Input: None
//
// Output: None
//
// Notes: None
//----------------------------------------------------------------------------
//<AMI_PHDR_END>
VOID
TerminalAcpiEnableDisableCallBack(
IN EFI_HANDLE DispatchHandle,
IN AMI_SMM_SW_DISPATCH_CONTEXT *DispatchContext
)
{
#if (TOTAL_PCI_SERIAL_PORTS > 0)
EFI_STATUS Status;
UINT8 RegNum = PCI_BAR0;
UINT32 PciAddr;
UINT32 BarAddress;
UINT8 i,DevFunc;
UINT8 gTotalSioSerialPorts = TOTAL_SIO_SERIAL_PORTS;
EFI_GUID gTerminalVarGuid = TERMINAL_VAR_GUID;
UINTN PciSerialPortsLocationVarSize =
sizeof(PCI_SERIAL_PORTS_LOCATION_VAR);
PCI_SERIAL_PORTS_LOCATION_VAR PciSerialPortsLocationVar;
UINTN SerialPortsEnabledVarSize = sizeof(SERIAL_PORTS_ENABLED_VAR);
UINT32 SerialPortsEnabledVarAttributes=0;
SERIAL_PORTS_ENABLED_VAR SerialPortsEnabledVar;
Status = pRS->GetVariable(SERIAL_PORTS_ENABLED_VAR_C_NAME,
&gTerminalVarGuid,
&SerialPortsEnabledVarAttributes,
&SerialPortsEnabledVarSize,
&SerialPortsEnabledVar);
if (!EFI_ERROR(Status)) {
Status = pRS->GetVariable(PCI_SERIAL_PORTS_LOCATION_VAR_C_NAME,
&gTerminalVarGuid,
NULL,
&PciSerialPortsLocationVarSize,
&PciSerialPortsLocationVar);
if (!EFI_ERROR(Status)) {
for (i = 0; i < TOTAL_PCI_SERIAL_PORTS; i++) {
//
// Look for the PCI device that are enabled.
//
if (SerialPortsEnabledVar.PortsEnabled[gTotalSioSerialPorts+i]) {
if ((PciSerialPortsLocationVar.Bus[i] == 0) &&
(PciSerialPortsLocationVar.Device[i] == 0) &&
(PciSerialPortsLocationVar.Function[i] == 0)) {
continue;
}
DevFunc = (PciSerialPortsLocationVar.Device[i] << 3) + PciSerialPortsLocationVar.Function[i];
PciAddr = ((UINT32) (( (UINT16) PciSerialPortsLocationVar.Bus[i] ) << 8) + DevFunc) << 8;
PciAddr += (RegNum & 0xfc);
PciAddr |= 0x80000000;
IoWrite32(CFG_SPACE_INDEX_REG, PciAddr);
BarAddress = IoRead32(CFG_SPACE_DATA_REG);
//
// Reset the IER register of UART.
//
if(BarAddress & 1) {
IoWrite32(BarAddress, 0);
} else {
*(UINTN*)( (BarAddress & 0xfffffff0) + 1) = 0;
}
}
}
//
// Replace the Actual INT08h routine which was hooked by Legacy console Redirection
//
*(UINT16*)0x0020 = (UINT16)INT08h_OFFSET;
*(UINT16*)0x0022 = (UINT16)INT08h_SEGMENT;
IoWrite8(0x80,0x99);
}
}
#endif
return;
}
//*************************************************************************
//*************************************************************************
//** **
//** (C)Copyright 1985-2011, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//*************************************************************************
//*************************************************************************
|
