linux-kernel - [PATCH v1] ARM: zynq: Fix earlyprintk in big endian mode

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Message-Id: <1433945584-16379-1-git-send-email-achandran@mvista.com>
Date:	Wed, 10 Jun 2015 19:43:04 +0530
From:	Arun Chandran <achandran@...sta.com>
To:	Michal Simek <michal.simek@...inx.com>
Cc:	linux-kernel@...r.kernel.org, Michal Simek <monstr@...str.eu>,
	Sören Brinkmann <soren.brinkmann@...inx.com>,
	linux-arm-kernel@...ts.infradead.org,
	Arun Chandran <achandran@...sta.com>
Subject: [PATCH v1] ARM: zynq: Fix earlyprintk in big endian mode

earlyprintk messages are not appearing on the terminal
emulator during a big endian kernel boot. If we
byte swap the sending data it comes properly.

Signed-off-by: Arun Chandran <achandran@...sta.com>
---
---
This can be tested by adding 'early_print("early print test\n");'
to setup_arch() in arch/arm/kernel/setup.c
---
 arch/arm/include/debug/zynq.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/include/debug/zynq.S b/arch/arm/include/debug/zynq.S
index bd13ded..0d274fe 100644
--- a/arch/arm/include/debug/zynq.S
+++ b/arch/arm/include/debug/zynq.S
@@ -38,6 +38,7 @@
 		.endm
 
 		.macro	senduart,rd,rx
+ARM_BE8(	rev	\rd, \rd )
 		str	\rd, [\rx, #UART_FIFO_OFFSET]	@ TXDATA
 		.endm
 
-- 
1.9.1

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