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/* $NetBSD: asm.h,v 1.6 2006/09/05 19:00:42 ad Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)asm.h 5.5 (Berkeley) 5/7/91
*/
#ifndef _AMD64_ASM_H_
#define _AMD64_ASM_H_
#ifdef PIC
#define PIC_PLT(x) x@PLT
#define PIC_GOT(x) x@GOTPCREL(%rip)
#else
#define PIC_PLT(x) x
#define PIC_GOT(x) x
#endif
# define _C_LABEL(x) x
#define _ASM_LABEL(x) x
#define CVAROFF(x,y) (_C_LABEL(x)+y)(%rip)
#ifdef __STDC__
# define __CONCAT(x,y) x ## y
# define __STRING(x) #x
#else
# define __CONCAT(x,y) x/**/y
# define __STRING(x) "x"
#endif
/* let kernels and others override entrypoint alignment */
#ifndef _ALIGN_TEXT
#define _ALIGN_TEXT .align 4
#endif
#define _ENTRY(x) \
.text; _ALIGN_TEXT; .globl x; .type x,@function; x:
#ifdef _KERNEL
/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
#ifdef __STDC__
#define IDTVEC(name) \
ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:
#else
#define IDTVEC(name) \
ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:
#endif /* __STDC__ */
#endif /* _KERNEL */
#ifdef __STDC__
#define CPUVAR(off) %gs:CPU_INFO_ ## off
#else
#define CPUVAR(off) %gs:CPU_INFO_/**/off
#endif
#ifdef GPROF
# define _PROF_PROLOGUE \
pushq %rbp; leaq (%rsp),%rbp; call PIC_PLT(__mcount); popq %rbp
#else
# define _PROF_PROLOGUE
#endif
#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
#define NENTRY(y) _ENTRY(_C_LABEL(y))
#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define ASMSTR .asciz
#define RCSID(x) .text; .asciz x
#define WEAK_ALIAS(alias,sym) \
.weak alias; \
alias = sym
/*
* STRONG_ALIAS: create a strong alias.
*/
#define STRONG_ALIAS(alias,sym) \
.globl alias; \
alias = sym
/* XXXfvdl do not use stabs here */
#ifdef __STDC__
#define WARN_REFERENCES(sym,msg) \
.stabs msg ## ,30,0,0,0 ; \
.stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
#else
#define WARN_REFERENCES(sym,msg) \
.stabs msg,30,0,0,0 ; \
.stabs __STRING(sym),1,0,0,0
#endif /* __STDC__ */
/*
* Assembley equivalent of spllower(). Label contains the label to jump to
* if we need to fire off pending interrupts (e.g. _C_LABEL(Xspllower)).
*
* On entry %rcx = new SPL.
*/
#define SPLLOWER(label) \
movq CPUVAR(SELF), %r9 ; \
cmpl CPU_INFO_ILEVEL(%r9), %ecx ; \
jae 99f ; \
movl CPU_INFO_IUNMASK(%r9,%rcx,4), %edi ; \
pushfq ; \
popq %rax ; \
cli ; \
testl CPU_INFO_IPENDING(%r9), %edi ; \
movq %rcx, %rdi ; \
jnz label ; \
movl %ecx, CPU_INFO_ILEVEL(%r9) ; \
pushq %rax ; \
popfq ; \
99:
#endif /* !_AMD64_ASM_H_ */
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