aarch64/include/asm.h

1.7      maxv /* $NetBSD: asm.h,v 1.7 2020/04/12 07:49:58 maxv Exp $ */
1.1      matt
1.1      matt #ifndef _AARCH64_ASM_H_
1.1      matt #define _AARCH64_ASM_H_
1.1      matt
1.7      maxv #if defined(_KERNEL_OPT)
1.7      maxv #include "opt_cpuoptions.h"
1.7      maxv #endif
1.7      maxv
1.1      matt #include <arm/asm.h>
1.1      matt
1.4     joerg #ifdef __aarch64__
1.6     skrll
1.6     skrll #ifdef __ASSEMBLER__
1.6     skrll .macro	adrl 	reg, addr
1.6     skrll 	adrp	\reg, \addr
1.6     skrll 	add	\reg, \reg, #:lo12:\addr
1.6     skrll .endm
1.6     skrll #endif
1.6     skrll
1.3  christos #define	fp	x29
1.3  christos #define	lr	x30
1.5       ryo
1.5       ryo /*
1.5       ryo  * Add a speculation barrier after the 'eret'.
1.5       ryo  * Some aarch64 cpus speculatively execute instructions after 'eret',
1.5       ryo  * and this potentiates side-channel attacks.
1.5       ryo  */
1.5       ryo #define	ERET	\
1.5       ryo 	eret; dsb sy; isb
1.5       ryo
1.7      maxv /*
1.7      maxv  * ARMv8 options to be made available for the compiler to use. Should be
1.7      maxv  * inserted at the beginning of the ASM files that need them.
1.7      maxv  *
1.7      maxv  * For now the only option is PAC, needed for the compiler to recognize
1.7      maxv  * the key registers.
1.7      maxv  */
1.7      maxv #ifdef ARMV83_PAC
1.7      maxv #define ARMV8_DEFINE_OPTIONS	\
1.7      maxv 	.arch armv8.3-a+pac
1.7      maxv #else
1.7      maxv #define ARMV8_DEFINE_OPTIONS	/* nothing */
1.7      maxv #endif
1.7      maxv
1.4     joerg #endif
1.3  christos
1.1      matt #endif /* !_AARCH64_ASM_H_ */