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/** @file
Initializes PCH IO APIC Device.
@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 "PchInit.h"
/**
Configure IoApic Controler
@param[in] PchPlatformPolicy The PCH Platform Policy protocol instance
@param[in] RootComplexBar RootComplexBar address of this PCH device
@retval EFI_SUCCESS The function completed successfully
**/
EFI_STATUS
ConfigureIoApic (
IN DXE_PCH_PLATFORM_POLICY_PROTOCOL *PchPlatformPolicy,
IN UINT32 RootComplexBar
)
{
UINT8 RegData8;
UINT16 RegData16;
UINT32 RegData32;
UINTN PciD31F0RegBase;
UINT32 IoApicAddress;
PCH_IO_APIC_CONFIG *IoApicConfig;
PCH_LPC_HPET_CONFIG *HpetConfig;
UINT8 Index;
DEBUG ((EFI_D_INFO, "ConfigureIoApic() Start\n"));
///
/// Get LPC base address
///
PciD31F0RegBase = MmPciAddress (0, PchPlatformPolicy->BusNumber, 31, 0, 0);
IoApicConfig = PchPlatformPolicy->IoApicConfig;
///
/// PCH BIOS Spec Rev 0.5.0, Section 6.6.2.1
/// 1. Enable the IOAPIC by setting the APIC Enable bit, RCBA + offset 31FFh, Bit[0] if the
/// system needs to use the IOxAPIC. The APIC Enable bits needs read back after the bit is written.
/// Done in PchInitPeim.c PchIoApicInit()
///
/// 2. Build the MP table and/or ACPI APIC table for the OS
/// This will be done in ACPI code.
///
/// 3. Maximum Redirection Entries (MRE) in APIC Version Register (VER), offset 01h,
/// [23:16] has to be written once for Microsoft Windows OS.
/// The address bits 19:12 of IOAPIC INDEX and DATA are programmable
/// through OIC register at RCBA + 31FEh[7:0].
///
IoApicAddress = (UINT32) MmioRead8 (RootComplexBar + R_PCH_RCRB_OIC);
IoApicAddress = IoApicAddress << N_PCH_IO_APIC_ASEL;
RegData8 = 0x01;
MmioWrite8 ((UINTN) (R_PCH_IO_APIC_INDEX | IoApicAddress), RegData8);
SCRIPT_MEM_WRITE (
EFI_ACPI_S3_RESUME_SCRIPT_TABLE,
EfiBootScriptWidthUint8,
(UINTN) (R_PCH_IO_APIC_INDEX | IoApicAddress),
1,
&RegData8
);
RegData32 = 0x170020;
if (GetPchSeries() == PchLp) {
if (IoApicConfig->IoApicEntry24_39 == PCH_DEVICE_ENABLE) {
RegData32 = 0x270020;
}
}
MmioWrite32 ((R_PCH_IO_APIC_DATA | IoApicAddress), RegData32);
SCRIPT_MEM_WRITE (
EFI_ACPI_S3_RESUME_SCRIPT_TABLE,
EfiBootScriptWidthUint32,
(UINTN) (R_PCH_IO_APIC_DATA | IoApicAddress),
1,
&RegData32
);
///
/// Program this field to provide a unique bus:device:function number for the internal IOxAPIC
///
if (IoApicConfig->BdfValid) {
RegData16 = ((UINT16) (IoApicConfig->BusNumber) << 8) & B_PCH_LPC_IOXAPIC_BUS;
RegData16 |= ((UINT16) (IoApicConfig->DeviceNumber) << 3) & B_PCH_LPC_IOXAPIC_DEVICE;
RegData16 |= (UINT16) (IoApicConfig->FunctionNumber) & B_PCH_LPC_IOXAPIC_FUNC;
MmioWrite16 ((UINTN) (PciD31F0RegBase + R_PCH_LPC_IOXAPIC), RegData16);
SCRIPT_MEM_WRITE (
EFI_ACPI_S3_RESUME_SCRIPT_TABLE,
EfiBootScriptWidthUint16,
(UINTN) (PciD31F0RegBase + R_PCH_LPC_IOXAPIC),
1,
&RegData16
);
}
///
/// Program this field accordingly if unique bus:device:function number is required for the
/// corresponding HPET
///
HpetConfig = PchPlatformPolicy->HpetConfig;
if (HpetConfig->BdfValid) {
for (Index = 0; Index < PCH_HPET_BDF_MAX; Index++) {
RegData16 = ((UINT16) (HpetConfig->Hpet[Index].BusNumber) << 8) & B_PCH_LPC_HPET0_BUS;
RegData16 |= ((UINT16) (HpetConfig->Hpet[Index].DeviceNumber) << 3) & B_PCH_LPC_HPET0_DEVICE;
RegData16 |= (UINT16) (HpetConfig->Hpet[Index].FunctionNumber) & B_PCH_LPC_HPET0_FUNC;
MmioWrite16 ((UINTN) (PciD31F0RegBase + R_PCH_LPC_HPET0 + Index * 2), RegData16);
SCRIPT_MEM_WRITE (
EFI_ACPI_S3_RESUME_SCRIPT_TABLE,
EfiBootScriptWidthUint16,
(UINTN) (PciD31F0RegBase + R_PCH_LPC_HPET0 + Index * 2),
1,
&RegData16
);
}
}
DEBUG ((EFI_D_INFO, "ConfigureIoApic() End\n"));
return EFI_SUCCESS;
}
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