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Diffstat (limited to 'Core/EM/Terminal/TerminalAcpi.c')
| -rw-r--r-- | Core/EM/Terminal/TerminalAcpi.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/Core/EM/Terminal/TerminalAcpi.c b/Core/EM/Terminal/TerminalAcpi.c new file mode 100644 index 0000000..da03372 --- /dev/null +++ b/Core/EM/Terminal/TerminalAcpi.c @@ -0,0 +1,179 @@ +//************************************************************************* +//************************************************************************* +//** ** +//** (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 ** +//** ** +//************************************************************************* +//*************************************************************************
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