OvmfPkg: Add CsmSupportLib
This library installs the legacy interrupt, region and platform support required for CSM support drivers. Signed-off-by: jljusten Reviewed-by: geekboy15a git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12681 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten
196
OvmfPkg/Csm/CsmSupportLib/LegacyInterrupt.c
Normal file
196
OvmfPkg/Csm/CsmSupportLib/LegacyInterrupt.c
Normal file
@@ -0,0 +1,196 @@
|
||||
/** @file
|
||||
Legacy Interrupt Support
|
||||
|
||||
Copyright (c) 2006 - 2011, 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 "LegacyInterrupt.h"
|
||||
|
||||
//
|
||||
// Handle for the Legacy Interrupt Protocol instance produced by this driver
|
||||
//
|
||||
STATIC EFI_HANDLE mLegacyInterruptHandle = NULL;
|
||||
|
||||
//
|
||||
// The Legacy Interrupt Protocol instance produced by this driver
|
||||
//
|
||||
STATIC EFI_LEGACY_INTERRUPT_PROTOCOL mLegacyInterrupt = {
|
||||
GetNumberPirqs,
|
||||
GetLocation,
|
||||
ReadPirq,
|
||||
WritePirq
|
||||
};
|
||||
|
||||
STATIC UINT8 PirqReg[MAX_PIRQ_NUMBER] = { PIRQA, PIRQB, PIRQC, PIRQD, PIRQE, PIRQF, PIRQG, PIRQH };
|
||||
|
||||
|
||||
/**
|
||||
Return the number of PIRQs supported by this chipset.
|
||||
|
||||
@param[in] This Pointer to LegacyInterrupt Protocol
|
||||
@param[out] NumberPirqs The pointer to return the max IRQ number supported
|
||||
|
||||
@retval EFI_SUCCESS Max PIRQs successfully returned
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
GetNumberPirqs (
|
||||
IN EFI_LEGACY_INTERRUPT_PROTOCOL *This,
|
||||
OUT UINT8 *NumberPirqs
|
||||
)
|
||||
{
|
||||
*NumberPirqs = MAX_PIRQ_NUMBER;
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Return PCI location of this device.
|
||||
$PIR table requires this info.
|
||||
|
||||
@param[in] This - Protocol instance pointer.
|
||||
@param[out] Bus - PCI Bus
|
||||
@param[out] Device - PCI Device
|
||||
@param[out] Function - PCI Function
|
||||
|
||||
@retval EFI_SUCCESS Bus/Device/Function returned
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
GetLocation (
|
||||
IN EFI_LEGACY_INTERRUPT_PROTOCOL *This,
|
||||
OUT UINT8 *Bus,
|
||||
OUT UINT8 *Device,
|
||||
OUT UINT8 *Function
|
||||
)
|
||||
{
|
||||
*Bus = LEGACY_INT_BUS;
|
||||
*Device = LEGACY_INT_DEV;
|
||||
*Function = LEGACY_INT_FUNC;
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Builds the PCI configuration address for the register specified by PirqNumber
|
||||
|
||||
@param[in] PirqNumber - The PIRQ number to build the PCI configuration address for
|
||||
|
||||
@return The PCI Configuration address for the PIRQ
|
||||
**/
|
||||
UINTN
|
||||
GetAddress (
|
||||
UINT8 PirqNumber
|
||||
)
|
||||
{
|
||||
return PCI_LIB_ADDRESS(
|
||||
LEGACY_INT_BUS,
|
||||
LEGACY_INT_DEV,
|
||||
LEGACY_INT_FUNC,
|
||||
PirqReg[PirqNumber]
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
Read the given PIRQ register
|
||||
|
||||
@param[in] This Protocol instance pointer
|
||||
@param[in] PirqNumber The Pirq register 0 = A, 1 = B etc
|
||||
@param[out] PirqData Value read
|
||||
|
||||
@retval EFI_SUCCESS Decoding change affected.
|
||||
@retval EFI_INVALID_PARAMETER Invalid PIRQ number
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
ReadPirq (
|
||||
IN EFI_LEGACY_INTERRUPT_PROTOCOL *This,
|
||||
IN UINT8 PirqNumber,
|
||||
OUT UINT8 *PirqData
|
||||
)
|
||||
{
|
||||
if (PirqNumber >= MAX_PIRQ_NUMBER) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
*PirqData = PciRead8 (GetAddress (PirqNumber));
|
||||
*PirqData = (UINT8) (*PirqData & 0x7f);
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Write the given PIRQ register
|
||||
|
||||
@param[in] This Protocol instance pointer
|
||||
@param[in] PirqNumber The Pirq register 0 = A, 1 = B etc
|
||||
@param[out] PirqData Value to write
|
||||
|
||||
@retval EFI_SUCCESS Decoding change affected.
|
||||
@retval EFI_INVALID_PARAMETER Invalid PIRQ number
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
WritePirq (
|
||||
IN EFI_LEGACY_INTERRUPT_PROTOCOL *This,
|
||||
IN UINT8 PirqNumber,
|
||||
IN UINT8 PirqData
|
||||
)
|
||||
{
|
||||
if (PirqNumber >= MAX_PIRQ_NUMBER) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
PciWrite8 (GetAddress (PirqNumber), PirqData);
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Initialize Legacy Interrupt support
|
||||
|
||||
@retval EFI_SUCCESS Successfully initialized
|
||||
|
||||
**/
|
||||
EFI_STATUS
|
||||
LegacyInterruptInstall (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
|
||||
//
|
||||
// Make sure the Legacy Interrupt Protocol is not already installed in the system
|
||||
//
|
||||
ASSERT_PROTOCOL_ALREADY_INSTALLED(NULL, &gEfiLegacyInterruptProtocolGuid);
|
||||
|
||||
//
|
||||
// Make a new handle and install the protocol
|
||||
//
|
||||
Status = gBS->InstallMultipleProtocolInterfaces (
|
||||
&mLegacyInterruptHandle,
|
||||
&gEfiLegacyInterruptProtocolGuid,
|
||||
&mLegacyInterrupt,
|
||||
NULL
|
||||
);
|
||||
ASSERT_EFI_ERROR(Status);
|
||||
|
||||
return Status;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user