From 9a833a40c7288466318dd10cc8fa7a898613f75a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
Date: Fri, 30 Nov 2012 17:05:40 -0800
Subject: [PATCH 01/11] ARM: decompressor: Flush tlb before swiching domain 0
 to client mode
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If the bootloader used a page table that is incompatible with domain 0
in client mode, and boots with the mmu on, then swithing domain 0 to
client mode causes a fault if we don't flush the tlb after updating
the page table pointer.

v2: Add ISB before loading dacr.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
---
 arch/arm/boot/compressed/head.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 9f406e9c0ea6..750c8c0d5d9e 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -892,6 +892,8 @@ __armv7_mmu_cache_on:
 		bic     r6, r6, #1 << 31        @ 32-bit translation system
 		bic     r6, r6, #(7 << 0) | (1 << 4)	@ use only ttbr0
 		mcrne	p15, 0, r3, c2, c0, 0	@ load page table pointer
+		mcrne	p15, 0, r0, c8, c7, 0	@ flush I,D TLBs
+		mcr	p15, 0, r0, c7, c5, 4	@ ISB
 		mcrne	p15, 0, r1, c3, c0, 0	@ load domain access control
 		mcrne   p15, 0, r6, c2, c0, 2   @ load ttb control
 #endif
-- 
2.38.1

