/* $NetBSD: asm.h,v 1.38 2026/03/15 17:10:34 christos Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * Copyright (c) 1994 Allen Briggs * All rights reserved. * * Gleaned from locore.s and sun3 asm.h which had the following copyrights: * locore.s: * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1990 The Regents of the University of California. * sun3/include/asm.h: * Copyright (c) 1993 Adam Glass * Copyright (c) 1990 The Regents of the University of California. * * 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. */ #ifndef _M68K_ASM_H_ #define _M68K_ASM_H_ #define __IMMEDIATE # #ifdef __PIC__ #define PIC_PLT(name) name@PLTPC #ifdef __mcoldfire__ #define LEA_LCL(name,reg) \ movl __IMMEDIATE name - .,reg ; \ lea (-6,%pc,reg),reg #define GOT_SETUP(reg) \ movl __IMMEDIATE _GLOBAL_OFFSET_TABLE_@GOTPC,reg ; \ lea (-6,%pc,reg),reg #else #define LEA_LCL(name,reg) lea (name,%pc),reg #define GOT_SETUP(reg) lea (_GLOBAL_OFFSET_TABLE_@GOTPC,%pc),reg #endif #else #define PIC_PLT(name) name #define LEA_LCL(name,reg) movl __IMMEDIATE name,reg #define GOT_SETUP(reg) /* nothing */ #endif #define _C_LABEL(x) x #define _ASM_LABEL(name) name #define _ENTRY(name) \ .text; .even; .globl name; .type name,@function; name: #define END(name) .size name,.-name #define MCOUNT_ENTRY __mcount #ifdef GPROF #define _PROF_PROLOG link %a6,#0; jbsr MCOUNT_ENTRY; unlk %a6 #else #define _PROF_PROLOG #endif #define ENTRY(name) _ENTRY(_C_LABEL(name)) _PROF_PROLOG #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)) _PROF_PROLOG #define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name)) #define ASENTRY_NOPROFILE(name) _ENTRY(_ASM_LABEL(name)) /* * The m68k ALTENTRY macro is very different than the traditional * implementation used by other NetBSD ports. Usually ALTENTRY * simply provides an alternate function entry point. The m68k * definition takes a second argument and jumps inside the second * function when profiling is enabled. * * The m68k behavior is similar to the ENTRY2 macro found in * solaris' asm_linkage.h. * * Providing ENTRY2 and changing all the code that uses ALTENTRY * to use it would be a desirable change. */ #ifdef PROF #define ALTENTRY(name, rname) ENTRY(name); jra rname+12 #else #define ALTENTRY(name, rname) _ENTRY(_C_LABEL(name)) #endif #ifdef _NETBSD_REVISIONID #define RCSID(x) .pushsection ".ident","MS",@progbits,1; \ .asciz x; \ .ascii "$"; .ascii "NetBSD: "; .ascii __FILE__; \ .ascii " "; .ascii _NETBSD_REVISIONID; \ .asciz " $"; \ .popsection #else #define RCSID(x) .pushsection ".ident","MS",@progbits,1; \ .asciz x; \ .popsection #endif /* * Global variables of whatever sort. */ #define GLOBAL(x) \ .globl _C_LABEL(x) ; \ _C_LABEL(x): #define ASGLOBAL(x) \ .globl _ASM_LABEL(x) ; \ _ASM_LABEL(x): /* * ...and local variables. */ #define LOCAL(x) \ _C_LABEL(x): #define ASLOCAL(x) \ _ASM_LABEL(x): /* * Items in the BSS segment. */ #define BSS(name, size) \ .comm _C_LABEL(name),size #define ASBSS(name, size) \ .comm _ASM_LABEL(name),size /* * Need a better place for these but these are common across * all m68k ports so let's define just once. */ #ifdef __mcoldfire__ #define INTERRUPT_SAVEREG lea -16(%sp),%sp; moveml #0xC0C0,(%sp) #define INTERRUPT_RESTOREREG moveml (%sp),#0x0303; lea 16(%sp),%sp #else #define INTERRUPT_SAVEREG moveml #0xC0C0,-(%sp) #define INTERRUPT_RESTOREREG moveml (%sp)+,#0x0303 #endif #ifdef _KERNEL /* * Shorthand for calling panic(). * Note the side-effect: it uses up the 9: label, so be careful! */ #define PANIC(x) \ pea 9f ; \ jbsr _C_LABEL(panic) ; \ 9: .asciz x ; \ .even /* 64-bit counter increments */ #define CPUINFO_INCREMENT(n) \ lea _C_LABEL(cpu_info_store)+(n)+4,%a1; \ addq.l #1,(%a1); \ clr.l %d0; /* doesn't change CCR[X] */ \ move.l -(%a1),%d1; /* doesn't change CCR[X] */ \ addx.l %d0,%d1; \ move.l %d1,(%a1) /* 64-bit counter increments */ #define CPUINFO_ADD(n, addend) \ lea _C_LABEL(cpu_info_store)+(n)+4,%a1; \ add.l addend,(%a1); \ clr.l %d0; /* doesn't change CCR[X] */ \ move.l -(%a1),%d1; /* doesn't change CCR[X] */ \ addx.l %d0,%d1; \ move.l %d1,(%a1) #endif /* _KERNEL */ /* * Shorthand for defining vectors for the vector table. */ #define VECTOR(x) \ .long _C_LABEL(x) #define ASVECTOR(x) \ .long _ASM_LABEL(x) #define VECTOR_UNUSED \ .long 0 #define WEAK_ALIAS(alias,sym) \ .weak alias; \ alias = sym /* * STRONG_ALIAS: create a strong alias. */ #define STRONG_ALIAS(alias,sym) \ .globl alias; \ alias = sym #ifdef __STDC__ #define WARN_REFERENCES(sym,msg) \ .pushsection .gnu.warning. ## sym; \ .ascii msg; \ .popsection #else #define WARN_REFERENCES(sym,msg) \ .pushsection .gnu.warning./**/sym; \ .ascii msg; \ .popsection #endif /* __STDC__ */ /* * Macros to hide shortcomings in the 68010. */ #ifdef __mc68010__ #define EXTBL(reg) \ extw reg ; \ extl reg #else /* __mc68010__ */ #define EXTBL(reg) \ extbl reg #endif /* __mc68010__ */ #endif /* _M68K_ASM_H_ */
