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Annotation of kernel/mach/ppc/syscall_sw.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* Copyright (c) 1991 NeXT Computer, Inc.  All rights reserved.
        !            26:  *
        !            27:  *     File:   mach/ppc/syscall_sw.h
        !            28:  *     Author: Matt Watson, NeXT Computer, Inc.
        !            29:  *
        !            30:  *     This header file defines system call macros
        !            31:  *     for the PowerPC family processors.
        !            32:  *
        !            33:  * HISTORY
        !            34:  *
        !            35:  *  4-Apr-97  Umesh Vaishampayan ([email protected])
        !            36:  *     Fixed the system call calling convention.
        !            37:  *
        !            38:  *  28-Mar-97  Matt Watson ([email protected])
        !            39:  *     Ported to ppc.
        !            40:  *
        !            41:  *  6-Nov-92  Ben Fathi ([email protected])
        !            42:  *     Ported to m98k.
        !            43:  *
        !            44:  * 23-Jan-91  Mike DeMoney ([email protected])
        !            45:  *     Created.
        !            46:  */
        !            47: 
        !            48: #ifndef        _MACH_PPC_SYSCALL_SW_H_
        !            49: #define        _MACH_PPC_SYSCALL_SW_H_
        !            50: 
        !            51: #import <architecture/ppc/asm_help.h>
        !            52: #import <architecture/ppc/pseudo_inst.h>
        !            53: 
        !            54: /*
        !            55:  * Mach system call traps.
        !            56:  *
        !            57:  * The first 8 system call args are passed by user-code in
        !            58:  * a0 - a7. (Should there ever need to be more
        !            59:  * than 8 args, those should be passed in s0 - s17.)
        !            60:  *
        !            61:  * The system call number is in r0.
        !            62:  *
        !            63:  * NOTE: (Like the C calling convention), the kernel does not
        !            64:  * preserve caller-saves across system calls.
        !            65:  */
        !            66: 
        !            67: /*
        !            68:  * kernel_trap_args_N -- Put the arguments in the right places.
        !            69:  * Args are passed in a0 - a7, system call number in ep.
        !            70:  */
        !            71: #define        kernel_trap_args_0
        !            72: #define        kernel_trap_args_1
        !            73: #define        kernel_trap_args_2
        !            74: #define        kernel_trap_args_3
        !            75: #define        kernel_trap_args_4
        !            76: #define        kernel_trap_args_5
        !            77: #define        kernel_trap_args_6
        !            78: #define        kernel_trap_args_7
        !            79: 
        !            80: /*
        !            81:  * simple_kernel_trap -- Mach system calls with 8 or less args
        !            82:  * Args are passed in a0 - a7, system call number in r0.
        !            83:  * Do a "sc" instruction to enter kernel.
        !            84:  */    
        !            85: #define simple_kernel_trap(trap_name, trap_number)     \
        !            86:        .globl  _##trap_name                            @\
        !            87: _##trap_name:                                          @\
        !            88:        li      r0,trap_number                           @\
        !            89:        sc                                               @\
        !            90:        blr                                              @\
        !            91:        END(trap_name)
        !            92: 
        !            93: #define kernel_trap_0(trap_name,trap_number)            \
        !            94:        simple_kernel_trap(trap_name,trap_number)
        !            95: 
        !            96: #define kernel_trap_1(trap_name,trap_number)            \
        !            97:        simple_kernel_trap(trap_name,trap_number)
        !            98: 
        !            99: #define kernel_trap_2(trap_name,trap_number)            \
        !           100:        simple_kernel_trap(trap_name,trap_number)
        !           101: 
        !           102: #define kernel_trap_3(trap_name,trap_number)            \
        !           103:        simple_kernel_trap(trap_name,trap_number)
        !           104: 
        !           105: #define kernel_trap_4(trap_name,trap_number)            \
        !           106:        simple_kernel_trap(trap_name,trap_number)
        !           107: 
        !           108: #define kernel_trap_5(trap_name,trap_number)            \
        !           109:        simple_kernel_trap(trap_name,trap_number)
        !           110: 
        !           111: #define kernel_trap_6(trap_name,trap_number)            \
        !           112:        simple_kernel_trap(trap_name,trap_number)
        !           113: 
        !           114: #define kernel_trap_7(trap_name,trap_number)            \
        !           115:        simple_kernel_trap(trap_name,trap_number)
        !           116: 
        !           117: #define kernel_trap_8(trap_name,trap_number)            \
        !           118:         simple_kernel_trap(trap_name,trap_number)
        !           119: 
        !           120: #define kernel_trap_9(trap_name,trap_number)            \
        !           121:         simple_kernel_trap(trap_name,trap_number)
        !           122: 
        !           123: #define kernel_trap(trap_name,trap_number,nargs)        \
        !           124:        kernel_trap_##nargs(trap_name,trap_number)
        !           125: 
        !           126: #endif /* _MACH_PPC_SYSCALL_SW_H_ */

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