mirror of https://github.com/acidanthera/audk.git
107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
/** @file
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*
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* Copyright (c) 2011-2012, ARM Limited. All rights reserved.
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*
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* This program and the accompanying materials
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* are licensed and made available under the terms and conditions of the BSD License
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* which accompanies this distribution. The full text of the license may be found at
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* http://opensource.org/licenses/bsd-license.php
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*
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* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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*
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**/
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#include <Library/BaseLib.h>
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#include <Library/IoLib.h>
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#include <Drivers/ArmTrustzone.h>
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#define TZPC_DECPROT0_STATUS_REG 0x800
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#define TZPC_DECPROT0_SET_REG 0x804
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#define TZPC_DECPROT0_CLEAR_REG 0x808
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#define TZASC_CONFIGURATION_REG 0x000
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#define TZASC_REGIONS_REG 0x100
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#define TZASC_REGION0_LOW_ADDRESS_REG 0x100
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#define TZASC_REGION0_HIGH_ADDRESS_REG 0x104
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#define TZASC_REGION0_ATTRIBUTES 0x108
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/**
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FIXME: Need documentation
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**/
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EFI_STATUS
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TZPCSetDecProtBits (
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IN UINTN TzpcBase,
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IN UINTN TzpcId,
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IN UINTN Bits
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)
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{
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if (TzpcId > TZPC_DECPROT_MAX) {
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return EFI_INVALID_PARAMETER;
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}
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MmioWrite32 ((UINTN)TzpcBase + TZPC_DECPROT0_SET_REG + (TzpcId * 0x0C), Bits);
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return EFI_SUCCESS;
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}
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/**
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FIXME: Need documentation
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**/
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EFI_STATUS
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TZPCClearDecProtBits (
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IN UINTN TzpcBase,
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IN UINTN TzpcId,
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IN UINTN Bits
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)
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{
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if (TzpcId> TZPC_DECPROT_MAX) {
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return EFI_INVALID_PARAMETER;
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}
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MmioWrite32 ((UINTN)TzpcBase + TZPC_DECPROT0_CLEAR_REG + (TzpcId * 0x0C), Bits);
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return EFI_SUCCESS;
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}
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/**
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FIXME: Need documentation
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**/
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UINT32
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TZASCGetNumRegions (
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IN UINTN TzascBase
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)
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{
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return (MmioRead32 ((UINTN)TzascBase + TZASC_CONFIGURATION_REG) & 0xF);
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}
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/**
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FIXME: Need documentation
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**/
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EFI_STATUS
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TZASCSetRegion (
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IN INTN TzascBase,
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IN UINTN RegionId,
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IN UINTN Enabled,
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IN UINTN LowAddress,
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IN UINTN HighAddress,
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IN UINTN Size,
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IN UINTN Security
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)
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{
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UINT32* Region;
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if (RegionId > TZASCGetNumRegions(TzascBase)) {
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return EFI_INVALID_PARAMETER;
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}
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Region = (UINT32*)((UINTN)TzascBase + TZASC_REGIONS_REG + (RegionId * 0x10));
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MmioWrite32((UINTN)(Region), LowAddress&0xFFFF8000);
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MmioWrite32((UINTN)(Region+1), HighAddress);
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MmioWrite32((UINTN)(Region+2), ((Security & 0xF) <<28) | ((Size & 0x3F) << 1) | (Enabled & 0x1));
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return EFI_SUCCESS;
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}
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