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Add macros for asm barrier instructions with arch-specific implementations.

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This commit is contained in:
Ian Lepore 2014-12-25 19:08:39 +00:00
parent e47bc38811
commit eb4585bcc6
1 changed files with 15 additions and 0 deletions
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15
sys/arm/include/asm.h
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@ -39,6 +39,7 @@
#ifndef _MACHINE_ASM_H_
#define _MACHINE_ASM_H_
#include <sys/cdefs.h>
#include <machine/sysreg.h>
#define _C_LABEL(x) x
#define _ASM_LABEL(x) x
@ -221,4 +222,18 @@
# define RETc(c) mov##c pc, lr
#endif
#if __ARM_ARCH >= 7
#define ISB isb
#define DSB dsb
#define DMB dmb
#elif __ARM_ARCH == 6
#define ISB mcr CP15_CP15ISB
#define DSB mcr CP15_CP15DSB
#define DMB mcr CP15_CP15DMB
#else
#define ISB mcr CP15_CP15ISB
#define DSB mcr CP15_CP15DSB /* DSB and DMB are the */
#define DMB mcr CP15_CP15DSB /* same prior to v6.*/
#endif
#endif /* !_MACHINE_ASM_H_ */