Annotation of sys/arch/sparc/sparc/asm.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: asm.h,v 1.5 2003/06/02 23:27:55 millert Exp $ */
! 2: /* $NetBSD: asm.h,v 1.4 1996/07/01 18:01:26 abrown Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1992, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This software was developed by the Computer Systems Engineering group
! 9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
! 10: * contributed to Berkeley.
! 11: *
! 12: * All advertising materials mentioning features or use of this software
! 13: * must display the following acknowledgement:
! 14: * This product includes software developed by the University of
! 15: * California, Lawrence Berkeley Laboratory.
! 16: *
! 17: * Redistribution and use in source and binary forms, with or without
! 18: * modification, are permitted provided that the following conditions
! 19: * are met:
! 20: * 1. Redistributions of source code must retain the above copyright
! 21: * notice, this list of conditions and the following disclaimer.
! 22: * 2. Redistributions in binary form must reproduce the above copyright
! 23: * notice, this list of conditions and the following disclaimer in the
! 24: * documentation and/or other materials provided with the distribution.
! 25: * 3. Neither the name of the University nor the names of its contributors
! 26: * may be used to endorse or promote products derived from this software
! 27: * without specific prior written permission.
! 28: *
! 29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 39: * SUCH DAMAGE.
! 40: *
! 41: * @(#)asm.h 8.1 (Berkeley) 6/11/93
! 42: */
! 43:
! 44: /*
! 45: * GCC __asm constructs for doing assembly stuff.
! 46: */
! 47:
! 48: /*
! 49: * ``Routines'' to load and store from/to alternate address space.
! 50: * The location can be a variable, the asi value (address space indicator)
! 51: * must be a constant.
! 52: *
! 53: * N.B.: You can put as many special functions here as you like, since
! 54: * they cost no kernel space or time if they are not used.
! 55: *
! 56: * These were static inline functions, but gcc screws up the constraints
! 57: * on the address space identifiers (the "n"umeric value part) because
! 58: * it inlines too late, so we have to use the funny valued-macro syntax.
! 59: */
! 60:
! 61: /* load byte from alternate address space */
! 62: #define lduba(loc, asi) ({ \
! 63: register int _lduba_v; \
! 64: __asm __volatile("lduba [%1]%2,%0" : "=r" (_lduba_v) : \
! 65: "r" ((int)(loc)), "n" (asi)); \
! 66: _lduba_v; \
! 67: })
! 68:
! 69: /* load half-word from alternate address space */
! 70: #define lduha(loc, asi) ({ \
! 71: register int _lduha_v; \
! 72: __asm __volatile("lduha [%1]%2,%0" : "=r" (_lduha_v) : \
! 73: "r" ((int)(loc)), "n" (asi)); \
! 74: _lduha_v; \
! 75: })
! 76:
! 77: /* load int from alternate address space */
! 78: #define lda(loc, asi) ({ \
! 79: register int _lda_v; \
! 80: __asm __volatile("lda [%1]%2,%0" : "=r" (_lda_v) : \
! 81: "r" ((int)(loc)), "n" (asi)); \
! 82: _lda_v; \
! 83: })
! 84:
! 85: /* store byte to alternate address space */
! 86: #define stba(loc, asi, value) ({ \
! 87: __asm __volatile("stba %0,[%1]%2" : : \
! 88: "r" ((int)(value)), "r" ((int)(loc)), "n" (asi)); \
! 89: })
! 90:
! 91: /* store half-word to alternate address space */
! 92: #define stha(loc, asi, value) ({ \
! 93: __asm __volatile("stha %0,[%1]%2" : : \
! 94: "r" ((int)(value)), "r" ((int)(loc)), "n" (asi)); \
! 95: })
! 96:
! 97: /* store int to alternate address space */
! 98: #define sta(loc, asi, value) ({ \
! 99: __asm __volatile("sta %0,[%1]%2" : : \
! 100: "r" ((int)(value)), "r" ((int)(loc)), "n" (asi)); \
! 101: })
! 102:
! 103: /* load 64-bit int from alternate address space */
! 104: #define ldda(loc, asi) ({ \
! 105: register long long _lda_v; \
! 106: __asm __volatile("ldda [%1]%2,%0" : "=r" (_lda_v) : \
! 107: "r" ((int)(loc)), "n" (asi)); \
! 108: _lda_v; \
! 109: })
! 110:
! 111: /* store 64-bit int to alternate address space */
! 112: #define stda(loc, asi, value) ({ \
! 113: __asm __volatile("stda %0,[%1]%2" : : \
! 114: "r" ((long long)(value)), "r" ((int)(loc)), "n" (asi)); \
! 115: })
! 116:
! 117: /* atomic swap of a word between a register and memory */
! 118: #define swap(loc, val) ({ \
! 119: __asm __volatile("swap [%2],%0" : "=&r" (val) : "0" (val), "r" (loc)); \
! 120: })
! 121:
! 122: #define wrasr(value, asr) _wrasr(value, asr)
! 123: #define _wrasr(value, asr) ({ \
! 124: __asm __volatile("wr %0, 0, %%asr"#asr : : "r" ((int)(value))); \
! 125: })
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