Add two functions to get/set VBAR register. Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx> --- Changes since v1 (http://lists.infradead.org/pipermail/barebox/2015-December/025685.html): - Use CONFIG_CPU_32v7 instead of __LINUX_ARM_ARCH__ --- arch/arm/include/asm/system.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h index 26fb18c..b118a42 100644 --- a/arch/arm/include/asm/system.h +++ b/arch/arm/include/asm/system.h @@ -71,6 +71,26 @@ static inline void set_cr(unsigned int val) isb(); } +#ifdef CONFIG_CPU_32v7 +static inline unsigned int get_vbar(void) +{ + unsigned int vbar; + asm volatile("mrc p15, 0, %0, c12, c0, 0 @ get VBAR" + : "=r" (vbar) : : "cc"); + return vbar; +} + +static inline void set_vbar(unsigned int vbar) +{ + asm volatile("mcr p15, 0, %0, c12, c0, 0 @ set VBAR" + : : "r" (vbar) : "cc"); + isb(); +} +#else +static inline unsigned int get_vbar(void) { return 0; } +static inline void set_vbar(unsigned int vbar) {} +#endif + #endif #endif /* __ASM_ARM_SYSTEM_H */ -- 2.5.0 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
