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553cb3ed46
sys/param.h was manually adjusted to not define __NetBSD_Version__ since it will be defined by the compiler.
52 lines
1.1 KiB
C
Vendored
52 lines
1.1 KiB
C
Vendored
/* $NetBSD: asm.h,v 1.9 2020/08/02 06:58:16 maxv Exp $ */
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#ifndef _AARCH64_ASM_H_
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#define _AARCH64_ASM_H_
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#if defined(_KERNEL_OPT)
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#include "opt_cpuoptions.h"
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#endif
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#include <arm/asm.h>
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#ifdef __aarch64__
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#ifdef __ASSEMBLER__
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.macro adrl reg, addr
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adrp \reg, \addr
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add \reg, \reg, #:lo12:\addr
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.endm
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#endif
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#define fp x29
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#define lr x30
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/*
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* Add a speculation barrier after the 'eret'.
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* Some aarch64 cpus speculatively execute instructions after 'eret',
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* and this potentiates side-channel attacks.
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*/
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#define ERET \
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eret; dsb sy; isb
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/*
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* ARMv8 options to be made available for the compiler to use. Should be
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* inserted at the beginning of the ASM files that need them.
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*
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* The options are:
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* - PAN, needed for the compiler to recognize the PAN register.
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* - PAC, needed for the compiler to recognize the key registers.
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*/
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#ifdef ARMV83_PAC
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#define ARMV8_DEFINE_OPTIONS \
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.arch armv8.3-a
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#elif defined(ARMV81_PAN)
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#define ARMV8_DEFINE_OPTIONS \
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.arch armv8.1-a
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#else
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#define ARMV8_DEFINE_OPTIONS /* nothing */
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#endif
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#endif
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#endif /* !_AARCH64_ASM_H_ */ |