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[ARM] 3488/1: make icedcc_putc do the right thing
author
Uwe Zeisberger
<Uwe_Zeisberger@digi.com>
Tue, 2 May 2006 19:40:56 +0000
(20:40 +0100)
committer
Russell King
<rmk+kernel@arm.linux.org.uk>
Tue, 2 May 2006 19:40:56 +0000
(20:40 +0100)
Patch from Uwe Zeisberger
a) use coprocessor 14
b) make reading the dcc status volatile
Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/boot/compressed/misc.c
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diff --git
a/arch/arm/boot/compressed/misc.c
b/arch/arm/boot/compressed/misc.c
index
0af3772
..
ace3fb5
100644
(file)
--- a/
arch/arm/boot/compressed/misc.c
+++ b/
arch/arm/boot/compressed/misc.c
@@
-38,10
+38,10
@@
static void icedcc_putc(int ch)
if (--i < 0)
return;
- asm("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
+ asm
volatile
("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
} while (status & 2);
- asm("mcr p1
5
, 0, %0, c1, c0, 0" : : "r" (ch));
+ asm("mcr p1
4
, 0, %0, c1, c0, 0" : : "r" (ch));
}
#define putc(ch) icedcc_putc(ch)