From 6a7dd08b1666758de339ff8096d542a3f4499053 Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Wed, 19 Jun 2013 12:39:52 -0700 Subject: libpayload: sync ARMv7 arch/io.h with coreboot On ARMv7 we need to carefully add memory barriers to all memory read and write operations. This change brings libpayload in sync with what coreboot is doing. Signed-off-by: Stefan Reinauer Change-Id: Ie9c30b0f0d30531c5f9d99c2729246a86b8cec26 Reviewed-on: https://gerrit.chromium.org/gerrit/59294 Reviewed-by: Gabe Black Tested-by: Stefan Reinauer Commit-Queue: Stefan Reinauer Reviewed-on: http://review.coreboot.org/4316 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- payloads/libpayload/include/armv7/arch/io.h | 46 +++++++++++++++++++++++++---- 1 file changed, 40 insertions(+), 6 deletions(-) (limited to 'payloads/libpayload/include') diff --git a/payloads/libpayload/include/armv7/arch/io.h b/payloads/libpayload/include/armv7/arch/io.h index 807dc1d2fb..8948e133ef 100644 --- a/payloads/libpayload/include/armv7/arch/io.h +++ b/payloads/libpayload/include/armv7/arch/io.h @@ -31,12 +31,46 @@ #ifndef _ARCH_IO_H #define _ARCH_IO_H -#define readb(_a) (*(volatile unsigned char *) (_a)) -#define readw(_a) (*(volatile unsigned short *) (_a)) -#define readl(_a) (*(volatile unsigned int *) (_a)) +#include +#include -#define writeb(_v, _a) (*(volatile unsigned char *) (_a) = (_v)) -#define writew(_v, _a) (*(volatile unsigned short *) (_a) = (_v)) -#define writel(_v, _a) (*(volatile unsigned int *) (_a) = (_v)) +static inline uint8_t readb(volatile void *_a) +{ + dmb(); + return *(volatile uint8_t *)_a; +} + +static inline uint16_t readw(volatile void *_a) +{ + dmb(); + return *(volatile uint16_t *)_a; +} + +static inline uint32_t readl(volatile void *_a) +{ + dmb(); + return *(volatile uint32_t *)_a; +} + +static inline void writeb(uint8_t _v, volatile void *_a) +{ + dmb(); + *(volatile uint8_t *)_a = _v; + dmb(); +} + +static inline void writew(uint16_t _v, volatile void *_a) +{ + dmb(); + *(volatile uint16_t *)_a = _v; + dmb(); +} + +static inline void writel(uint32_t _v, volatile void *_a) +{ + dmb(); + *(volatile uint32_t *)_a = _v; + dmb(); +} #endif -- cgit v1.2.3