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Annotation of driverkit/libDriver/Kernel/IOEthernetDebugger.m, 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) 1992 NeXT Computer, Inc.
        !            26:  *
        !            27:  * Kernel Debugger Category for Ethernet Class.
        !            28:  *
        !            29:  * HISTORY
        !            30:  *
        !            31:  * 7 December 1992 David E. Bohman at NeXT
        !            32:  *     Created.
        !            33:  *
        !            34:  * 29 May 1997 Dieter Siegmund at NeXT
        !            35:  * - Added debugger registration call, and made
        !            36:  *   en_send_pkt() and en_recv_pkt static
        !            37:  */
        !            38: 
        !            39: #import <mach/boolean.h>
        !            40: #import <mach/machine/simple_lock.h>
        !            41: #import        <sys/types.h>
        !            42: #import        <sys/socket.h>
        !            43: #import <driverkit/IOEthernet.h>
        !            44: #import <driverkit/IOEthernetPrivate.h>
        !            45: #import <kern/kdp_en_debugger.h>
        !            46: 
        !            47: #ifndef ppc
        !            48: extern int spl3();
        !            49: #else
        !            50: extern int splbio();
        !            51: #endif
        !            52: 
        !            53: static id              debuggerDevice;
        !            54: #ifndef sparc /* [ */
        !            55: static int             savedIpl;
        !            56: #ifndef ppc
        !            57: int                    (*debuggerIplRoutine)() = spl3;
        !            58: #else
        !            59: int                    (*debuggerIplRoutine)() = splbio;
        !            60: #endif
        !            61: static BOOL            _kernDebuggerLocked = NO;
        !            62: extern simple_lock_t   _kernDebuggerLock;
        !            63: #endif sparc /* ] */
        !            64: 
        !            65: static void
        !            66:     en_recv_pkt(
        !            67:                void            *pkt,
        !            68:                unsigned int    *pkt_len,
        !            69:                unsigned int    timeout);
        !            70: 
        !            71: static void
        !            72:     en_send_pkt(
        !            73:                void            *pkt,
        !            74:                unsigned int    pkt_len);
        !            75: 
        !            76: static void
        !            77:     (*recvPkt_methd)(
        !            78:                id, SEL,
        !            79:                void *                  pkt,
        !            80:                unsigned int *          pkt_len,
        !            81:                unsigned int            timeout);
        !            82: #define RECV_PKT_SEL           @selector(receivePacket:length:timeout:)
        !            83: 
        !            84: static void
        !            85:     (*sendPkt_methd)(
        !            86:                id, SEL,
        !            87:                void *                  pkt,
        !            88:                unsigned int            pkt_len);
        !            89: #define SEND_PKT_SEL           @selector(sendPacket:length:)
        !            90: 
        !            91: #ifdef sparc
        !            92: static BOOL
        !            93:     (*reset_method)(
        !            94:                id, SEL, 
        !            95:                BOOL            enable);
        !            96: #define RESET_SEL      @selector(resetAndEnable:)
        !            97: #endif sparc
        !            98: 
        !            99: @implementation IOEthernet(EthernetDebugger)
        !           100: 
        !           101: - (void)registerAsDebuggerDevice
        !           102: {
        !           103:     if (debuggerDevice == nil) {
        !           104:        /* register our debugger routines */
        !           105:        kdp_register_send_receive(&en_send_pkt, &en_recv_pkt);
        !           106:        (IMP)recvPkt_methd = [self methodFor:RECV_PKT_SEL];
        !           107:        (IMP)sendPkt_methd = [self methodFor:SEND_PKT_SEL];
        !           108: #ifndef  sparc
        !           109:        if ((IMP)recvPkt_methd && (IMP)sendPkt_methd)
        !           110:            debuggerDevice = self;
        !           111: #else
        !           112:        (IMP)reset_method = [self methodFor:RESET_SEL];
        !           113:        if ((IMP)recvPkt_methd && (IMP)sendPkt_methd && (IMP)reset_method)
        !           114:            debuggerDevice = self;
        !           115: #endif sparc
        !           116:     }
        !           117: }
        !           118: 
        !           119: #ifndef sparc /* [ */
        !           120: - (void)reserveDebuggerLock
        !           121: {
        !           122:     if (self == debuggerDevice) {
        !           123:        if (_kernDebuggerLocked) {
        !           124:            IOLog("reserveDebuggerLock: already locked\n");
        !           125:            return;
        !           126:        }
        !           127:        savedIpl = (*debuggerIplRoutine)();
        !           128:        simple_lock(_kernDebuggerLock);
        !           129:        _kernDebuggerLocked = YES;
        !           130:     }
        !           131: }
        !           132: 
        !           133: - (void)releaseDebuggerLock
        !           134: {
        !           135:     if (self == debuggerDevice) {
        !           136:        if (!_kernDebuggerLocked) {
        !           137:            return;
        !           138:        }
        !           139:        simple_unlock(_kernDebuggerLock);
        !           140:        _kernDebuggerLocked = NO;
        !           141:        splx(savedIpl);
        !           142:     }
        !           143: }
        !           144: 
        !           145: #endif sparc /* ] */
        !           146: @end
        !           147: 
        !           148: #ifndef sparc /* [ */
        !           149: void reserveDebuggerLock(id debuggerDeviceObject)
        !           150: {
        !           151:     if (debuggerDeviceObject == debuggerDevice) {
        !           152:        if (_kernDebuggerLocked) {
        !           153:            IOLog("reserveDebuggerLock: already locked\n");
        !           154:            return;
        !           155:        }
        !           156:        simple_lock(_kernDebuggerLock);
        !           157:        _kernDebuggerLocked = YES;
        !           158:     }
        !           159: }
        !           160: 
        !           161: void releaseDebuggerLock(id debuggerDeviceObject)
        !           162: {
        !           163:     if (debuggerDeviceObject == debuggerDevice) {
        !           164:        if (!_kernDebuggerLocked) {
        !           165:            return;
        !           166:        }
        !           167:        simple_unlock(_kernDebuggerLock);
        !           168:        _kernDebuggerLocked = NO;
        !           169:     }
        !           170: }
        !           171: 
        !           172: #endif sparc /* ] */
        !           173: 
        !           174: static void
        !           175: en_recv_pkt(
        !           176:     void               *pkt,
        !           177:     unsigned int       *pkt_len,
        !           178:     unsigned int       timeout
        !           179: )
        !           180: {
        !           181:     *pkt_len = 0;
        !           182:     
        !           183:     if (debuggerDevice)
        !           184:        (*recvPkt_methd)(debuggerDevice, RECV_PKT_SEL, pkt, pkt_len, timeout);    
        !           185: }
        !           186: 
        !           187: static void
        !           188: en_send_pkt(
        !           189:     void               *pkt,
        !           190:     unsigned int       pkt_len
        !           191: )
        !           192: {
        !           193:     if (debuggerDevice)
        !           194:        (*sendPkt_methd)(debuggerDevice, SEND_PKT_SEL, pkt, pkt_len);
        !           195: }
        !           196: 
        !           197: #ifdef sparc 
        !           198: void
        !           199: en_reset(
        !           200:     BOOL       enable
        !           201: )
        !           202: {
        !           203:     if (debuggerDevice)
        !           204:        (*reset_method)(debuggerDevice, RESET_SEL, enable);    
        !           205: }
        !           206: #endif sparc

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