sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ArmPkg: Configure TTBCR register

Browse Source 
Architecturally, the TTBCR register value is undefined at reset for
Non-Secure.
On some platforms the reset value for TTBCR is not zero and
this causes a data abort exception once the MMU is enabled.

This patch configures the TTBCR register to enable translation table
walk using TTBR0.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Evan Lloyd <evan.lloyd@arm.com>
This commit is contained in:
Evan Lloyd
2016-03-02 21:08:46 +00:00
committed by Leif Lindholm
parent eea222ced0
commit ff1f27c055
4 changed files with 32 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
ArmPkg/Include/Library/ArmLib.h
View File

@@ -1,7 +1,7 @@
/** @file
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Copyright (c) 2011 - 2015, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2011 - 2016, ARM Ltd. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@@ -353,6 +353,12 @@ ArmSetTTBR0 (
IN VOID *TranslationTableBase
);
VOID
EFIAPI
ArmSetTTBCR (
IN UINT32 Bits
);
VOID *
EFIAPI
ArmGetTTBR0BaseAddress (