/* $NetBSD: asm.h,v 1.35 2003/08/07 16:28:27 agc 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. 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 /* for API selection */ #include /* * 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 /* * STATIC_LEAF * Declare a local leaf function. */ #define STATIC_LEAF(x) \ .ent _C_LABEL(x), 0; \ _C_LABEL(x): ; \ .frame sp, 0, ra; \ MCOUNT /* * XLEAF * declare alternate entry to leaf routine */ #define XLEAF(x) \ .globl _C_LABEL(x); \ AENT (_C_LABEL(x)); \ _C_LABEL(x): /* * STATIC_XLEAF * declare alternate entry to a static leaf routine */ #define STATIC_XLEAF(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 */