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/** @file
*
* Copyright (c) 2011-2012, ARM Limited. All rights reserved.
*
* 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 <Library/BaseLib.h>
#include <Library/IoLib.h>
#include <Drivers/ArmTrustzone.h>
#define TZPC_DECPROT0_STATUS_REG 0x800
#define TZPC_DECPROT0_SET_REG 0x804
#define TZPC_DECPROT0_CLEAR_REG 0x808
#define TZASC_CONFIGURATION_REG 0x000
#define TZASC_REGIONS_REG 0x100
#define TZASC_REGION0_LOW_ADDRESS_REG 0x100
#define TZASC_REGION0_HIGH_ADDRESS_REG 0x104
#define TZASC_REGION0_ATTRIBUTES 0x108
/**
FIXME: Need documentation
**/
EFI_STATUS
TZPCSetDecProtBits (
IN UINTN TzpcBase,
IN UINTN TzpcId,
IN UINTN Bits
)
{
if (TzpcId > TZPC_DECPROT_MAX) {
return EFI_INVALID_PARAMETER;
}
MmioWrite32 ((UINTN)TzpcBase + TZPC_DECPROT0_SET_REG + (TzpcId * 0x0C), Bits);
return EFI_SUCCESS;
}
/**
FIXME: Need documentation
**/
EFI_STATUS
TZPCClearDecProtBits (
IN UINTN TzpcBase,
IN UINTN TzpcId,
IN UINTN Bits
)
{
if (TzpcId> TZPC_DECPROT_MAX) {
return EFI_INVALID_PARAMETER;
}
MmioWrite32 ((UINTN)TzpcBase + TZPC_DECPROT0_CLEAR_REG + (TzpcId * 0x0C), Bits);
return EFI_SUCCESS;
}
/**
FIXME: Need documentation
**/
UINT32
TZASCGetNumRegions (
IN UINTN TzascBase
)
{
return (MmioRead32 ((UINTN)TzascBase + TZASC_CONFIGURATION_REG) & 0xF);
}
/**
FIXME: Need documentation
**/
EFI_STATUS
TZASCSetRegion (
IN INTN TzascBase,
IN UINTN RegionId,
IN UINTN Enabled,
IN UINTN LowAddress,
IN UINTN HighAddress,
IN UINTN Size,
IN UINTN Security
)
{
UINT32* Region;
if (RegionId > TZASCGetNumRegions(TzascBase)) {
return EFI_INVALID_PARAMETER;
}
Region = (UINT32*)((UINTN)TzascBase + TZASC_REGIONS_REG + (RegionId * 0x10));
MmioWrite32((UINTN)(Region), LowAddress&0xFFFF8000);
MmioWrite32((UINTN)(Region+1), HighAddress);
MmioWrite32((UINTN)(Region+2), ((Security & 0xF) <<28) | ((Size & 0x3F) << 1) | (Enabled & 0x1));
return EFI_SUCCESS;
}
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