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Diffstat (limited to 'ReferenceCode/Chipset/LynxPoint/LegacyInterrupt/Dxe/LegacyInterrupt.c')
| -rw-r--r-- | ReferenceCode/Chipset/LynxPoint/LegacyInterrupt/Dxe/LegacyInterrupt.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/ReferenceCode/Chipset/LynxPoint/LegacyInterrupt/Dxe/LegacyInterrupt.c b/ReferenceCode/Chipset/LynxPoint/LegacyInterrupt/Dxe/LegacyInterrupt.c new file mode 100644 index 0000000..213f91b --- /dev/null +++ b/ReferenceCode/Chipset/LynxPoint/LegacyInterrupt/Dxe/LegacyInterrupt.c @@ -0,0 +1,204 @@ +/** @file + This code supports a the private implementation + of the Legacy Interrupt protocol + +@copyright + Copyright (c) 1999 - 2012 Intel Corporation. All rights reserved + This software and associated documentation (if any) is furnished + under a license and may only be used or copied in accordance + with the terms of the license. Except as permitted by such + license, no part of this software or documentation may be + reproduced, stored in a retrieval system, or transmitted in any + form or by any means without the express written consent of + Intel Corporation. + + This file contains an 'Intel Peripheral Driver' and uniquely + identified as "Intel Reference Module" and is + licensed for Intel CPUs and chipsets under the terms of your + license agreement with Intel or your vendor. This file may + be modified by the user, subject to additional terms of the + license agreement +**/ +#include "LegacyInterrupt.h" + +/// +/// Handle for the Legacy Interrupt Protocol instance produced by this driver +/// +EFI_HANDLE mLegacyInterruptHandle = NULL; + +/// +/// The Legacy Interrupt Protocol instance produced by this driver +/// +EFI_LEGACY_INTERRUPT_PROTOCOL mLegacyInterrupt = { + GetNumberPirqs, + GetLocation, + ReadPirq, + WritePirq +}; + +/// +/// Module Global: +/// Since this driver will only ever produce one instance of the Private Data +/// protocol you are not required to dynamically allocate the PrivateData. +/// +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 which point to the max IRQ number supported by this PCH. + + @retval EFI_SUCCESS Legacy BIOS protocol installed +**/ +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 = DEFAULT_PCI_BUS_NUMBER_PCH; + *Device = PCI_DEVICE_NUMBER_PCH_LPC; + *Function = PCI_FUNCTION_NUMBER_PCH_LPC; + + return EFI_SUCCESS; +} + +/** + Builds the PCIE configuration address for the register specified by PirqNumber + + @param[in] PirqNumber The PIRQ number to build the PCIE configuration address for + + @retval UINTN The PCIE Configuration address for interrupt controller in PCH +**/ +UINTN +GetAddress ( + UINT8 PirqNumber + ) +{ + return MmPciAddress ( + 0, + DEFAULT_PCI_BUS_NUMBER_PCH, + PCI_DEVICE_NUMBER_PCH_LPC, + PCI_FUNCTION_NUMBER_PCH_LPC, + PirqReg[PirqNumber] + ); +} + +/** + Read the given PIRQ register + + @param[in] This Pointer to LegacyInterrupt Protocol + @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 = MmioRead8 (GetAddress (PirqNumber)); + *PirqData = (UINT8) (*PirqData & 0x7f); + + return EFI_SUCCESS; +} + +/** + Read the given PIRQ register + + @param[in] This Pointer to LegacyInterrupt Protocol + @param[in] PirqNumber The Pirq register 0 = A, 1 = B etc + @param[in] PirqData Value read + + @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; + } + + MmioWrite8 (GetAddress (PirqNumber), PirqData); + return EFI_SUCCESS; +} + +/** + Install Driver to produce Legacy Interrupt protocol. + + @param[in] ImageHandle Handle for this drivers loaded image protocol. + @param[in] SystemTable EFI system table. + + @retval EFI_SUCCESS Legacy Interrupt protocol installed + @retval Other No protocol installed, unload driver. +**/ +EFI_STATUS +LegacyInterruptInstall ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + + DEBUG ((EFI_D_INFO, "LegacyInterruptInstall() Start\n")); + + /// + /// 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); + + DEBUG ((EFI_D_INFO, "LegacyInterruptInstall() End\n")); + return Status; +} |