From: ben.dooks@codethink.co.uk (Ben Dooks)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH RESEND 1/7] ARM: debug: fix big endian operation for 8250 word mode
Date: Wed, 25 Mar 2015 11:27:46 +0000 [thread overview]
Message-ID: <1427282872-10563-2-git-send-email-ben.dooks@codethink.co.uk> (raw)
In-Reply-To: <1427282872-10563-1-git-send-email-ben.dooks@codethink.co.uk>
If the 8250 debug code is used in word mode on an big endian
host then the writes need to be change into little endian for
the bus.
Note, we have to re-convert the value back as the debug code
will inspect the value after writing it to see if a newline
has been written.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
arch/arm/include/debug/8250.S | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm/include/debug/8250.S b/arch/arm/include/debug/8250.S
index 7a2baf9..7f7446f 100644
--- a/arch/arm/include/debug/8250.S
+++ b/arch/arm/include/debug/8250.S
@@ -16,11 +16,14 @@
#ifdef CONFIG_DEBUG_UART_8250_WORD
.macro store, rd, rx:vararg
+ ARM_BE8(rev \rd, \rd)
str \rd, \rx
+ ARM_BE8(rev \rd, \rd)
.endm
.macro load, rd, rx:vararg
ldr \rd, \rx
+ ARM_BE8(rev \rd, \rd)
.endm
#else
.macro store, rd, rx:vararg
--
2.1.4
next prev parent reply other threads:[~2015-03-25 11:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-25 11:27 [RESEND] Altera socfpga big endian work Ben Dooks
2015-03-25 11:27 ` Ben Dooks [this message]
2015-03-25 11:27 ` [PATCH RESEND 2/7] ARM: socfpga: enable big endian for secondary core(s) Ben Dooks
2015-03-25 11:27 ` [PATCH RESEND 3/7] ARM: socfpga: support big endian for socfpga Ben Dooks
2015-03-25 11:27 ` [PATCH RESEND 4/7] clocksource: dw_apb_timer_of: make IO endian agnostic Ben Dooks
2015-03-25 11:27 ` [PATCH RESEND 5/7] mmc: host: dw_mmc make IO accessors " Ben Dooks
2015-03-30 0:48 ` Jaehoon Chung
2015-03-25 11:27 ` [PATCH RESEND 6/7] mmc: host: dw_mmc: change idmac descriptor files to __le32 Ben Dooks
2015-03-25 11:27 ` [PATCH RESEND 7/7] mmc: host: dw_mmc: fix fifo ordering in big endian Ben Dooks
2015-03-31 14:13 ` [RESEND] Altera socfpga big endian work Dinh Nguyen
2015-03-31 15:34 ` Ben Dooks
2015-03-31 17:47 ` Dinh Nguyen
2015-04-01 10:50 ` Ben Dooks
2015-04-01 14:50 ` Dinh Nguyen
2015-04-01 16:01 ` Ben Dooks
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