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ARM: split barebox_arm_head in two separate functions 

This adds a new function __barebox_arm_head() which defines an
the regular barebox ARM header, but which jumps to the end of
the function so that this can be embedded into another function.
barebox_arm_head() now just uses it and jumps to barebox_arm_reset_vector
just like it did before.

This makes it possible to define board specific entry points.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-06-25 10:08:51 +02:00
parent 74ea37084b
commit dc7d63b3cc
1 changed files with 11 additions and 3 deletions
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14
arch/arm/include/asm/barebox-arm-head.h
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@ -43,7 +43,7 @@ static inline void arm_cpu_lowlevel_init(void)
#ifdef CONFIG_HAVE_MACH_ARM_HEAD
#include <mach/barebox-arm-head.h>
#else
static inline void barebox_arm_head(void)
static inline void __barebox_arm_head(void)
{
__asm__ __volatile__ (
#ifdef CONFIG_THUMB2_BAREBOX
@ -52,12 +52,12 @@ static inline void barebox_arm_head(void)
"bx r9\n"
".thumb\n"
"1:\n"
"bl barebox_arm_reset_vector\n"
"bl 2f\n"
".rept 10\n"
"1: b 1b\n"
".endr\n"
#else
"b barebox_arm_reset_vector\n"
"b 2f\n"
"1: b 1b\n"
"1: b 1b\n"
"1: b 1b\n"
@ -74,6 +74,14 @@ static inline void barebox_arm_head(void)
".rept 8\n"
".word 0x55555555\n"
".endr\n"
"2:\n"
);
}
static inline void barebox_arm_head(void)
{
__barebox_arm_head();
__asm__ __volatile__ (
"b barebox_arm_reset_vector\n"
);
}
#endif