From bc8b4fad1eae6b97b23304871fcdee43c8f360f1 Mon Sep 17 00:00:00 2001 From: Vadim Bendebury Date: Wed, 4 Jun 2014 10:43:37 -0700 Subject: [PATCH] libpayload: Introduce bit manipulation macros Some drivers being ported to depthcharge use io bit manipulation macros. The libpayload include file seems the most appropriate place to keep these macros in. There is no common io.h file across architectures, the x86 version could be added later if required. BUG=chrome-os-partner:27784 TEST=observed ipq806x SPI driver deptcharge port (WIP) compile properly. Original-Change-Id: I33f3be072faefce293c871f7e3bc3b2e6bc38ffe Original-Signed-off-by: Vadim Bendebury Original-Reviewed-on: https://chromium-review.googlesource.com/202559 Original-Reviewed-by: Stefan Reinauer Original-Reviewed-by: Trevor Bourget (cherry picked from commit ad18a605b4d0ec3251c1614e7358b42aa6b5c45a) Signed-off-by: Marc Jones Change-Id: I8656e12af20ce4cf11d771942e8fe7d4eb2a560d Reviewed-on: http://review.coreboot.org/8062 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- payloads/libpayload/include/arm/arch/io.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/payloads/libpayload/include/arm/arch/io.h b/payloads/libpayload/include/arm/arch/io.h index 8948e133ef..5cb66dcd69 100644 --- a/payloads/libpayload/include/arm/arch/io.h +++ b/payloads/libpayload/include/arm/arch/io.h @@ -73,4 +73,17 @@ static inline void writel(uint32_t _v, volatile void *_a) dmb(); } +/* + * Handy bit manipulation macros, BE version will have to be added when/if + * needed. + */ + +#ifdef CONFIG_LP_LITTLE_ENDIAN +#define clrsetbits_le32(addr, clear, set) writel((readl(addr) & ~(clear)) |\ + (set), (addr)) +#define setbits_le32(addr, set) writel(readl(addr) | (set), (addr)) +#define clrbits_le32(addr, clear) writel(readl(addr) & ~(clear), (addr)) #endif + +#endif +