| Message ID | 1381328993-12724-4-git-send-email-Dave.Martin@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h index 860256c..ec869e9 100644 --- a/arch/arm/include/asm/assembler.h +++ b/arch/arm/include/asm/assembler.h @@ -403,4 +403,10 @@ THUMB( orr \reg , \reg , #PSR_T_BIT ) ")" #endif /* ! __ASSEMBLY__ */ +#ifdef CONFIG_CPU_BIG_ENDIAN +#define __asm_cpu_to_le32(x) __asm_swab32(x) +#else +#define __asm_cpu_to_le32(x) "(" x ")" +#endif + #endif /* __ASM_ASSEMBLER_H__ */
On ARM, it's common for big-endian systems to use little-endian byte order for devices. This patch adds a __asm_cpu_to_le32() helper, similar to cpu_to_le32(). This is intended for preparing 32-bit constants to be stored to a device, or compared with data loaded from a device. Rather than add umpteen variants up front, extra variants can be added when needed. Accessing devices directly from asm is not the common case. Signed-off-by: Dave Martin <Dave.Martin@arm.com> --- arch/arm/include/asm/assembler.h | 6 ++++++ 1 file changed, 6 insertions(+)