From: Will Deacon <will.deacon@arm.com>
Date: Fri, 20 Jan 2012 11:10:18 +0000 (+0100)
Subject: ARM: 7296/1: proc-v7.S: remove HARVARD_CACHE preprocessor guards
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=612539e81f655f6ac73c7af1da8701c1ee618aee;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

ARM: 7296/1: proc-v7.S: remove HARVARD_CACHE preprocessor guards

On v7, we use the same cache maintenance instructions for data lines
as for unified lines. This was not the case for v6, where HARVARD_CACHE
was defined to indicate the L1 cache topology.

This patch removes the erroneous compile-time check for HARVARD_CACHE in
proc-v7.S, ensuring that we perform I-side invalidation at boot.

Reported-and-Acked-by: Shawn Guo <shawn.guo@linaro.org>

Cc: stable <stable@vger.kernel.org>
Acked-by: Catalin Marinas <Catalin.Marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index b15597400105..0404ccbb8aa3 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -148,10 +148,6 @@ ENDPROC(cpu_v7_do_resume)
  *	Initialise TLB, Caches, and MMU state ready to switch the MMU
  *	on.  Return in r0 the new CP15 C1 control register setting.
  *
- *	We automatically detect if we have a Harvard cache, and use the
- *	Harvard cache control instructions insead of the unified cache
- *	control instructions.
- *
  *	This should be able to cover all ARMv7 cores.
  *
  *	It is assumed that:
@@ -251,9 +247,7 @@ __v7_setup:
 #endif
 
 3:	mov	r10, #0
-#ifdef HARVARD_CACHE
 	mcr	p15, 0, r10, c7, c5, 0		@ I+BTB cache invalidate
-#endif
 	dsb
 #ifdef CONFIG_MMU
 	mcr	p15, 0, r10, c8, c7, 0		@ invalidate I + D TLBs