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freebsd-dev/sys/arm/include/asm.h
Ian Lepore a66dc0c52b Include machine/acle-compat.h in cdefs.h on arm if the compiler doesn't 
have ACLE support built in.  The ACLE (ARM C Language Extensions) defines
a set of standardized symbols which indicate the architecture version and
features available.  ACLE support is built in to modern compilers (both
clang and gcc), but absent from gcc prior to 4.4.

ARM (the company) provides the acle-compat.h header file to define the
right symbols for older versions of gcc.  Basically, acle-compat.h does
for arm about the same thing cdefs.h does for freebsd: defines
standardized macros that work no matter which compiler you use.  If ARM
hadn't provided this file we would have ended up with a big #ifdef __arm__
section in cdefs.h with our own compatibility shims.

Remove #include <machine/acle-compat.h> from the zillion other places (an
ever-growing list) that it appears.  Since style(9) requires sys/types.h
or sys/param.h early in the include list, and both of those lead to
including cdefs.h, only a couple special cases still need to include
acle-compat.h directly.

Loves it:     imp
2016-05-25 19:44:26 +00:00

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/* $NetBSD: asm.h,v 1.5 2003/08/07 16:26:53 agc 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.
*
* from: @(#)asm.h 5.5 (Berkeley) 5/7/91
*
* $FreeBSD$
*/
#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
#ifndef _ALIGN_TEXT
# define _ALIGN_TEXT .align 2
#endif
#ifndef _STANDALONE
#define STOP_UNWINDING .cantunwind
#define _FNSTART .fnstart
#define _FNEND .fnend
#define _SAVE(...) .save __VA_ARGS__
#else
#define STOP_UNWINDING
#define _FNSTART
#define _FNEND
#define _SAVE(...)
#endif
/*
* gas/arm uses @ as a single comment character and thus cannot be used here.
* It recognises the # instead of an @ symbol in .type directives.
*/
#define _ASM_TYPE_FUNCTION #function
#define _ASM_TYPE_OBJECT #object
/* XXX Is this still the right prologue for profiling? */
#ifdef GPROF
#define _PROF_PROLOGUE \
mov ip, lr; \
bl __mcount
#else
#define _PROF_PROLOGUE
#endif
/*
* EENTRY()/EEND() mark "extra" entry/exit points from a function.
* LEENTRY()/LEEND() are the same for local symbols.
* The unwind info cannot handle the concept of a nested function, or a function
* with multiple .fnstart directives, but some of our assembler code is written
* with multiple labels to allow entry at several points. The EENTRY() macro
* defines such an extra entry point without a new .fnstart, so that it's
* basically just a label that you can jump to. The EEND() macro does nothing
* at all, except document the exit point associated with the same-named entry.
*/
#define GLOBAL(x) .global x
#ifdef __thumb__
#define _FUNC_MODE .code 16; .thumb_func
#else
#define _FUNC_MODE .code 32
#endif
#define _LEENTRY(x) .type x,_ASM_TYPE_FUNCTION; _FUNC_MODE; x:
#define _LEEND(x) /* nothing */
#define _EENTRY(x) GLOBAL(x); _LEENTRY(x)
#define _EEND(x) _LEEND(x)
#define _LENTRY(x) .text; _ALIGN_TEXT; _LEENTRY(x); _FNSTART
#define _LEND(x) .size x, . - x; _FNEND
#define _ENTRY(x) .text; _ALIGN_TEXT; _EENTRY(x); _FNSTART
#define _END(x) _LEND(x)
#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
#define EENTRY(y) _EENTRY(_C_LABEL(y));
#define ENTRY_NP(y) _ENTRY(_C_LABEL(y))
#define EENTRY_NP(y) _EENTRY(_C_LABEL(y))
#define END(y) _END(_C_LABEL(y))
#define EEND(y) _EEND(_C_LABEL(y))
#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define ASLENTRY(y) _LENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define ASEENTRY(y) _EENTRY(_ASM_LABEL(y));
#define ASLEENTRY(y) _LEENTRY(_ASM_LABEL(y));
#define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
#define ASLENTRY_NP(y) _LENTRY(_ASM_LABEL(y))
#define ASEENTRY_NP(y) _EENTRY(_ASM_LABEL(y))
#define ASLEENTRY_NP(y) _LEENTRY(_ASM_LABEL(y))
#define ASEND(y) _END(_ASM_LABEL(y))
#define ASLEND(y) _LEND(_ASM_LABEL(y))
#define ASEEND(y) _EEND(_ASM_LABEL(y))
#define ASLEEND(y) _LEEND(_ASM_LABEL(y))
#define ASMSTR .asciz
#if defined(PIC)
#define PLT_SYM(x) PIC_SYM(x, PLT)
#define GOT_SYM(x) PIC_SYM(x, GOT)
#define GOT_GET(x,got,sym) \
ldr x, sym; \
ldr x, [x, got]
#define GOT_INIT(got,gotsym,pclabel) \
ldr got, gotsym; \
pclabel: add got, pc
#ifdef __thumb__
#define GOT_INITSYM(gotsym,pclabel) \
.align 2; \
gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+4)
#else
#define GOT_INITSYM(gotsym,pclabel) \
.align 2; \
gotsym: .word _C_LABEL(_GLOBAL_OFFSET_TABLE_) - (pclabel+8)
#endif
#ifdef __STDC__
#define PIC_SYM(x,y) x ## ( ## y ## )
#else
#define PIC_SYM(x,y) x/**/(/**/y/**/)
#endif
#else
#define PLT_SYM(x) x
#define GOT_SYM(x) x
#define GOT_GET(x,got,sym) \
ldr x, sym;
#define GOT_INIT(got,gotsym,pclabel)
#define GOT_INITSYM(gotsym,pclabel)
#define PIC_SYM(x,y) x
#endif /* PIC */
#undef __FBSDID
#if !defined(lint) && !defined(STRIP_FBSDID)
#define __FBSDID(s) .ident s
#else
#define __FBSDID(s) /* nothing */
#endif
#define WEAK_ALIAS(alias,sym) \
.weak alias; \
alias = sym
#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__ */
/* Exactly one of the __ARM_ARCH_*__ macros will be defined by the compiler. */
/* The _ARM_ARCH_* macros are deprecated and will be removed soon. */
/* This should be moved into another header so it can be used in
* both asm and C code. machine/asm.h cannot be included in C code. */
#if defined (__ARM_ARCH_7__) || defined (__ARM_ARCH_7A__)
#define _ARM_ARCH_7
#define _HAVE_ARMv7_INSTRUCTIONS 1
#endif
#if defined (_HAVE_ARMv7_INSTRUCTIONS) || defined (__ARM_ARCH_6__) || \
defined (__ARM_ARCH_6J__) || defined (__ARM_ARCH_6K__) || \
defined (__ARM_ARCH_6Z__) || defined (__ARM_ARCH_6ZK__)
#define _ARM_ARCH_6
#define _HAVE_ARMv6_INSTRUCTIONS 1
#endif
#if defined (_HAVE_ARMv6_INSTRUCTIONS) || defined (__ARM_ARCH_5TE__) || \
defined (__ARM_ARCH_5TEJ__) || defined (__ARM_ARCH_5E__)
#define _ARM_ARCH_5E
#define _HAVE_ARMv5E_INSTRUCTIONS 1
#endif
#if defined (_HAVE_ARMv5E_INSTRUCTIONS) || defined (__ARM_ARCH_5__) || \
defined (__ARM_ARCH_5T__)
#define _ARM_ARCH_5
#define _HAVE_ARMv5_INSTRUCTIONS 1
#endif
#if defined (_HAVE_ARMv5_INSTRUCTIONS) || defined (__ARM_ARCH_4T__)
#define _ARM_ARCH_4T
#define _HAVE_ARMv4T_INSTRUCTIONS 1
#endif
/* FreeBSD requires ARMv4, so this is always set. */
#define _HAVE_ARMv4_INSTRUCTIONS 1
#if defined (_HAVE_ARMv4T_INSTRUCTIONS)
# define RET bx lr
# define RETeq bxeq lr
# define RETne bxne lr
# define RETc(c) bx##c lr
#else
# define RET mov pc, lr
# define RETeq moveq pc, lr
# define RETne movne pc, lr
# define RETc(c) mov##c pc, lr
#endif
#if __ARM_ARCH >= 7
#define ISB isb
#define DSB dsb
#define DMB dmb
#define WFI wfi
#elif __ARM_ARCH == 6
#define ISB mcr CP15_CP15ISB
#define DSB mcr CP15_CP15DSB
#define DMB mcr CP15_CP15DMB
#define WFI mcr CP15_CP15WFI
#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.*/
/* No form of WFI available on v4, define nothing to get an error on use. */
#endif
#endif /* !_MACHINE_ASM_H_ */
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