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