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NetBSD/sys/arch/mips/include/asm.h

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/* $NetBSD: asm.h,v 1.33 2002/06/05 06:02:52 simonb Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)machAsmDefs.h 8.1 (Berkeley) 6/10/93
*/
/*
* machAsmDefs.h --
*
* Macros used when writing assembler programs.
*
* Copyright (C) 1989 Digital Equipment Corporation.
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies.
* Digital Equipment Corporation makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAsmDefs.h,
* v 1.2 89/08/15 18:28:24 rab Exp SPRITE (DECWRL)
*/
#ifndef _MIPS_ASM_H
#define _MIPS_ASM_H
#include <machine/cdefs.h> /* for API selection */
#include <mips/regdef.h>
/*
* Define -pg profile entry code.
* Must always be noreorder, must never use a macro instruction
* Final addiu to t9 must always equal the size of this _KERN_MCOUNT
*/
#define _KERN_MCOUNT \
.set push; \
.set noreorder; \
.set noat; \
subu sp,sp,16; \
sw t9,12(sp); \
move AT,ra; \
lui t9,%hi(_mcount); \
addiu t9,t9,%lo(_mcount); \
jalr t9; \
nop; \
lw t9,4(sp); \
addiu sp,sp,8; \
addiu t9,t9,40; \
.set pop;
#ifdef GPROF
#define MCOUNT _KERN_MCOUNT
#else
#define MCOUNT
#endif
#ifdef __NO_LEADING_UNDERSCORES__
# define _C_LABEL(x) x
#else
# ifdef __STDC__
# define _C_LABEL(x) _ ## x
# else
# define _C_LABEL(x) _/**/x
# endif
#endif
#ifdef USE_AENT
#define AENT(x) \
.aent x, 0
#else
#define AENT(x)
#endif
/*
* WEAK_ALIAS: create a weak alias.
*/
#define WEAK_ALIAS(alias,sym) \
.weak alias; \
alias = sym
/*
* WARN_REFERENCES: create a warning if the specified symbol is referenced.
*/
#ifdef __STDC__
#define WARN_REFERENCES(_sym,_msg) \
.section .gnu.warning. ## _sym ; .ascii _msg ; .text
#else
#define WARN_REFERENCES(_sym,_msg) \
.section .gnu.warning./**/_sym ; .ascii _msg ; .text
#endif /* __STDC__ */
/*
* LEAF
* A leaf routine does
* - call no other function,
* - never use any register that callee-saved (S0-S8), and
* - not use any local stack storage.
*/
#define LEAF(x) \
.globl _C_LABEL(x); \
.ent _C_LABEL(x), 0; \
_C_LABEL(x): ; \
.frame sp, 0, ra; \
MCOUNT
/*
* LEAF_NOPROFILE
* No profilable leaf routine.
*/
#define LEAF_NOPROFILE(x) \
.globl _C_LABEL(x); \
.ent _C_LABEL(x), 0; \
_C_LABEL(x): ; \
.frame sp, 0, ra
/*
* XLEAF
* declare alternate entry to leaf routine
*/
#define XLEAF(x) \
.globl _C_LABEL(x); \
AENT (_C_LABEL(x)); \
_C_LABEL(x):
/*
* NESTED
* A function calls other functions and needs
* therefore stack space to save/restore registers.
*/
#define NESTED(x, fsize, retpc) \
.globl _C_LABEL(x); \
.ent _C_LABEL(x), 0; \
_C_LABEL(x): ; \
.frame sp, fsize, retpc; \
MCOUNT
/*
* NESTED_NOPROFILE(x)
* No profilable nested routine.
*/
#define NESTED_NOPROFILE(x, fsize, retpc) \
.globl _C_LABEL(x); \
.ent _C_LABEL(x), 0; \
_C_LABEL(x): ; \
.frame sp, fsize, retpc
/*
* XNESTED
* declare alternate entry point to nested routine.
*/
#define XNESTED(x) \
.globl _C_LABEL(x); \
AENT (_C_LABEL(x)); \
_C_LABEL(x):
/*
* END
* Mark end of a procedure.
*/
#define END(x) \
.end _C_LABEL(x)
/*
* IMPORT -- import external symbol
*/
#define IMPORT(sym, size) \
.extern _C_LABEL(sym),size
/*
* EXPORT -- export definition of symbol
*/
#define EXPORT(x) \
.globl _C_LABEL(x); \
_C_LABEL(x):
/*
* VECTOR
* exception vector entrypoint
* XXX: regmask should be used to generate .mask
*/
#define VECTOR(x, regmask) \
.ent _C_LABEL(x),0; \
EXPORT(x); \
#ifdef __STDC__
#define VECTOR_END(x) \
EXPORT(x ## End); \
END(x)
#else
#define VECTOR_END(x) \
EXPORT(x/**/End); \
END(x)
#endif
/*
* Macros to panic and printf from assembly language.
*/
#define PANIC(msg) \
la a0, 9f; \
jal _C_LABEL(panic); \
nop; \
MSG(msg)
#define PRINTF(msg) \
la a0, 9f; \
jal _C_LABEL(printf); \
nop; \
MSG(msg)
#define MSG(msg) \
.rdata; \
9: .asciiz msg; \
.text
#define ASMSTR(str) \
.asciiz str; \
.align 3
/*
* XXX retain dialects XXX
*/
#define ALEAF(x) XLEAF(x)
#define NLEAF(x) LEAF_NOPROFILE(x)
#define NON_LEAF(x, fsize, retpc) NESTED(x, fsize, retpc)
#define NNON_LEAF(x, fsize, retpc) NESTED_NOPROFILE(x, fsize, retpc)
/*
* standard callframe {
* register_t cf_args[4]; arg0 - arg3
* register_t cf_sp; frame pointer
* register_t cf_ra; return address
* };
*/
#define CALLFRAME_SIZ (4 * (4 + 2))
#define CALLFRAME_SP (4 * 4)
#define CALLFRAME_RA (4 * 5)
/*
* While it would be nice to be compatible with the SGI
* REG_L and REG_S macros, because they do not take parameters, it
* is impossible to use them with the _MIPS_SIM_ABIX32 model.
*
* These macros hide the use of mips3 instructions from the
* assembler to prevent the assembler from generating 64-bit style
* ABI calls.
*/
#if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32
#define REG_L lw
#define REG_S sw
#define REG_LI li
#define REG_PROLOGUE .set push
#define REG_EPILOGUE .set pop
#define SZREG 4
#else
#define REG_L ld
#define REG_S sd
#define REG_LI dli
#define REG_PROLOGUE .set push ; .set mips3
#define REG_EPILOGUE .set pop
#define SZREG 8
#endif /* _MIPS_BSD_API */
/*
* The DYNAMIC_STATUS_MASK option adds an additional masking operation
* when updating the hardware interrupt mask in the status register.
*
* This is useful for platforms that need to at run-time mask
* interrupts based on motherboard configuration or to handle
* slowly clearing interrupts.
*
* XXX this is only currently implemented for mips3.
*/
#ifdef MIPS_DYNAMIC_STATUS_MASK
#define DYNAMIC_STATUS_MASK(sr,scratch) \
lw scratch, mips_dynamic_status_mask; \
and sr, sr, scratch
#define DYNAMIC_STATUS_MASK_TOUSER(sr,scratch1) \
ori sr, (MIPS_INT_MASK | MIPS_SR_INT_IE); \
DYNAMIC_STATUS_MASK(sr,scratch1)
#else
#define DYNAMIC_STATUS_MASK(sr,scratch)
#define DYNAMIC_STATUS_MASK_TOUSER(sr,scratch1)
#endif
#endif /* _MIPS_ASM_H */
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