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ARM: debug: fix big endian operation for 8250 word mode 

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>
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
This commit is contained in:
Ben Dooks 2015-03-25 11:27:46 +00:00 committed by Dinh Nguyen
parent 5ebe6afaf0
commit 6ef4e47926
1 changed files with 3 additions and 0 deletions
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3
arch/arm/include/debug/8250.S
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@ -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