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Annotation of sys/arch/m88k/include/asm_macro.h, Revision 1.1.1.1

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__ */