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Annotation of sys/arch/m88k/include/asm_macro.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: asm_macro.h,v 1.3 2005/12/03 16:52:16 miod Exp $ */
        !             2: /*
        !             3:  * Mach Operating System
        !             4:  * Copyright (c) 1993-1991 Carnegie Mellon University
        !             5:  * Copyright (c) 1991 OMRON Corporation
        !             6:  * All Rights Reserved.
        !             7:  *
        !             8:  * Permission to use, copy, modify and distribute this software and its
        !             9:  * documentation is hereby granted, provided that both the copyright
        !            10:  * notice and this permission notice appear in all copies of the
        !            11:  * software, derivative works or modified versions, and any portions
        !            12:  * thereof, and that both notices appear in supporting documentation.
        !            13:  *
        !            14:  * CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            15:  * CONDITION.  CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
        !            16:  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            17:  *
        !            18:  * Carnegie Mellon requests users of this software to return to
        !            19:  *
        !            20:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
        !            21:  *  School of Computer Science
        !            22:  *  Carnegie Mellon University
        !            23:  *  Pittsburgh PA 15213-3890
        !            24:  *
        !            25:  * any improvements or extensions that they make and grant Carnegie the
        !            26:  * rights to redistribute these changes.
        !            27:  */
        !            28:
        !            29: #ifndef __M88K_ASM_MACRO_H__
        !            30: #define __M88K_ASM_MACRO_H__
        !            31:
        !            32: /*
        !            33:  * Various compiler macros used for speed and efficiency.
        !            34:  * Anyone can include.
        !            35:  */
        !            36:
        !            37: #include <machine/asm.h>
        !            38:
        !            39: /*
        !            40:  * Flushes the data pipeline.
        !            41:  */
        !            42: #define        flush_pipeline() \
        !            43:        __asm__ __volatile__ (FLUSH_PIPELINE_STRING)
        !            44:
        !            45: /*
        !            46:  * Sets the PSR.
        !            47:  */
        !            48: static __inline__ void set_psr(u_int psr)
        !            49: {
        !            50:        __asm__ __volatile__ ("stcr %0, cr1" :: "r" (psr));
        !            51:        __asm__ __volatile__ (FLUSH_PIPELINE_STRING);
        !            52: }
        !            53:
        !            54: /*
        !            55:  * Gets the PSR.
        !            56:  */
        !            57: static __inline__ u_int get_psr(void)
        !            58: {
        !            59:        u_int psr;
        !            60:        __asm__ __volatile__ ("ldcr %0, cr1" : "=r" (psr));
        !            61:        return (psr);
        !            62: }
        !            63:
        !            64: #define        disable_interrupt(psr)  set_psr(((psr) = get_psr()) | PSR_IND)
        !            65:
        !            66: /*
        !            67:  * Provide access from C code to the assembly instruction ff1
        !            68:  */
        !            69: static __inline__ unsigned ff1(unsigned val)
        !            70: {
        !            71:        __asm__ __volatile__ ("ff1 %0, %0" : "=r" (val) : "0" (val));
        !            72:        return (val);
        !            73: }
        !            74:
        !            75: static __inline__ u_int get_cpu_pid(void)
        !            76: {
        !            77:        u_int pid;
        !            78:        __asm__ __volatile__ ("ldcr %0, cr0" : "=r" (pid));
        !            79:        return (pid);
        !            80: }
        !            81:
        !            82: #endif /* __M88K_ASM_MACRO_H__ */