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Annotation of kernel/driverkit/ppc/PPCKernBus.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: /*
        !            26:  * Copyright (c) 1994 NeXT Computer, Inc.
        !            27:  *
        !            28:  * Kernel PPC Bus Resource Object(s).
        !            29:  *
        !            30:  * HISTORY
        !            31:  *
        !            32:  * 28 June 1994 Curtis Galloway at NeXT
        !            33:  *     Derived from EISA files.
        !            34:  */
        !            35: 
        !            36: #import <mach/mach_types.h>
        !            37: 
        !            38: #import <driverkit/KernLock.h>
        !            39: #import <driverkit/ppc/PPCKernBus.h>
        !            40: #import <driverkit/ppc/PPCKernBusPrivate.h>
        !            41: #import <driverkit/KernDevice.h>
        !            42: #import <driverkit/ppc/driverTypes.h>
        !            43: #import <driverkit/ppc/driverTypesPrivate.h>
        !            44: #import <kernserv/ppc/spl.h>
        !            45: #import <machdep/ppc/interrupts.h>
        !            46: 
        !            47: 
        !            48: 
        !            49: static void
        !            50: PPCKernBusInterruptDispatch(int deviceIntr, void * ssp, void *_interrupt)
        !            51: {
        !            52:     BOOL                       leave_enabled;
        !            53:     PPCKernBusInterrupt_ *     interrupt = (PPCKernBusInterrupt_ *)_interrupt;
        !            54: 
        !            55:     leave_enabled = KernBusInterruptDispatch(_interrupt, ssp);
        !            56:     if (!leave_enabled) {
        !            57:         KernLockAcquire(interrupt->_PPCLock);
        !            58:         pmac_disable_irq(interrupt->_irq);
        !            59:         interrupt->_irqEnabled = NO;
        !            60:         KernLockRelease(interrupt->_PPCLock);
        !            61:     }
        !            62: }
        !            63: 
        !            64: @implementation PPCKernBusInterrupt
        !            65: 
        !            66: - initForResource:     resource
        !            67:        item:           (unsigned int)item
        !            68:        shareable:      (BOOL)shareable
        !            69: {
        !            70:     [super initForResource:resource item:item shareable:shareable];
        !            71: 
        !            72:     _irq = item;
        !            73:     _irqEnabled = NO;
        !            74:     _PPCLock = [[KernLock alloc] initWithLevel:7];
        !            75:     _priorityLevel = IPLDEVICE;
        !            76: 
        !            77:     return self;
        !            78: }
        !            79: 
        !            80: - dealloc
        !            81: {
        !            82:     [_PPCLock free];
        !            83:     return [super dealloc];
        !            84: }
        !            85: 
        !            86: - attachDeviceInterrupt:       interrupt
        !            87: {
        !            88:     unsigned int pmac_device = pmac_int_to_number(_irq);
        !            89: 
        !            90:     if (!interrupt)
        !            91:        return nil;
        !            92: 
        !            93:     if (pmac_device == (-1))
        !            94:        return nil;
        !            95: 
        !            96:     [_PPCLock acquire];
        !            97: 
        !            98:     if( NO == _irqAttached) {
        !            99: #warning all PPC driverkit drivers get SPLBIO
        !           100:         pmac_register_int(pmac_device, SPLBIO,
        !           101:                         (void (*)(int, void *, void *))PPCKernBusInterruptDispatch,
        !           102:                         (void *)self);
        !           103:        _irqAttached = YES;
        !           104:     }
        !           105:     /*
        !           106:      * -attachDeviceInterrupt will return nil
        !           107:      * if the interrupt is suspended.
        !           108:      */
        !           109:     if ([super attachDeviceInterrupt:interrupt]) {
        !           110:         _irqEnabled = YES;
        !           111:         pmac_enable_irq(_irq);
        !           112:     } else {
        !           113:         pmac_disable_irq(_irq);
        !           114:         _irqEnabled = NO;
        !           115:     }
        !           116: 
        !           117: //  _irqAttached = YES;
        !           118:     
        !           119:     [_PPCLock release];
        !           120:        
        !           121:     return self;
        !           122: }
        !           123: 
        !           124: - attachDeviceInterrupt:       interrupt
        !           125:                atLevel:        (int)level
        !           126: {
        !           127:     unsigned int pmac_device = pmac_int_to_number(_irq);
        !           128: 
        !           129:     if (!interrupt)
        !           130:        return nil;
        !           131:        
        !           132:     if (pmac_device == (-1))
        !           133:        return nil;
        !           134: 
        !           135:     [_PPCLock acquire];
        !           136: 
        !           137:     if (level < _priorityLevel || level >  IPLSCHED) {
        !           138:        [_PPCLock release];
        !           139:        return nil;
        !           140:     }
        !           141:        
        !           142: //    if (level > _priorityLevel)
        !           143: //     intr_change_ipl(irq, level);
        !           144:        
        !           145:     _priorityLevel = level;
        !           146: 
        !           147:     if( NO == _irqAttached) {
        !           148:         pmac_register_int(pmac_device, SPLBIO,
        !           149:                         (void (*)(int, void *, void *))PPCKernBusInterruptDispatch,
        !           150:                         (void *)self);
        !           151:        _irqAttached = YES;
        !           152:     }
        !           153:     /*
        !           154:      * -attachDeviceInterrupt will return nil
        !           155:      * if the interrupt is suspended.
        !           156:      */
        !           157:     if ([super attachDeviceInterrupt:interrupt]) {
        !           158:         _irqEnabled = YES;
        !           159:         pmac_enable_irq(_irq);
        !           160:     } else {
        !           161:         pmac_disable_irq(_irq);
        !           162:         _irqEnabled = NO;
        !           163:     }
        !           164: 
        !           165: //  _irqAttached = YES;
        !           166: 
        !           167:     [_PPCLock release];
        !           168:     return self;
        !           169: }
        !           170: 
        !           171: - detachDeviceInterrupt:       interrupt
        !           172: {
        !           173:     int                        irq = [self item];
        !           174:     
        !           175:     [_PPCLock acquire];
        !           176: 
        !           177:     if ( ![super detachDeviceInterrupt:interrupt]) {
        !           178:       pmac_disable_irq(_irq);
        !           179:       _irqEnabled = NO;
        !           180:     }
        !           181: 
        !           182: //  _irqAttached = NO;
        !           183:        
        !           184:     [_PPCLock release];
        !           185:     return self;
        !           186: }
        !           187: 
        !           188: - suspend
        !           189: {
        !           190:     [_PPCLock acquire];
        !           191: 
        !           192:     [super suspend];
        !           193: 
        !           194: 
        !           195:     if (_irqEnabled) {
        !           196:       pmac_disable_irq(_irq);
        !           197:       _irqEnabled = NO;
        !           198:     }
        !           199:        
        !           200:     [_PPCLock release];
        !           201:     
        !           202:     return self;
        !           203: }
        !           204: 
        !           205: - resume
        !           206: {
        !           207:     [_PPCLock acquire];
        !           208: 
        !           209:     if ([super resume] && !_irqEnabled) {
        !           210:         _irqEnabled = YES;
        !           211:         pmac_enable_irq(_irq);
        !           212:     }
        !           213: 
        !           214:     [_PPCLock release];
        !           215:     
        !           216:     return self;
        !           217: }
        !           218: 
        !           219: @end
        !           220: 
        !           221: 
        !           222: 
        !           223: @implementation PPCKernBus
        !           224: 
        !           225: static const char *resourceNameStrings[] = {
        !           226:     IRQ_LEVELS_KEY,
        !           227:     DMA_CHANNELS_KEY,
        !           228:     MEM_MAPS_KEY,
        !           229:     IO_PORTS_KEY,
        !           230:     NULL
        !           231: };
        !           232: 
        !           233: + initialize
        !           234: {
        !           235:     [self registerBusClass:self name:"PPC"];
        !           236:     return self;
        !           237: }
        !           238: 
        !           239: - init
        !           240: {
        !           241:     [super init];
        !           242:     
        !           243:     [self _insertResource:[[KernBusItemResource alloc]
        !           244:                                initWithItemCount:IO_NUM_PPC_INTERRUPTS
        !           245:                                itemKind:[PPCKernBusInterrupt class]
        !           246:                                owner:self]
        !           247:                    withKey:IRQ_LEVELS_KEY];
        !           248: 
        !           249:     [self _insertResource:[[KernBusRangeResource alloc]
        !           250:                                        initWithExtent:RangeMAX
        !           251:                                        kind:[KernBusMemoryRange class]
        !           252:                                        owner:self]
        !           253:                    withKey:MEM_MAPS_KEY];
        !           254: 
        !           255:     [[self class] registerBusInstance:self name:"PPC" busId:[self busId]];
        !           256: 
        !           257:     printf("PPC bus support enabled\n");
        !           258:     return self;
        !           259: }
        !           260: 
        !           261: - (const char **)resourceNames
        !           262: {
        !           263:     return resourceNameStrings;
        !           264: }
        !           265: 
        !           266: - free
        !           267: {
        !           268: 
        !           269:     if ([self areResourcesActive])
        !           270:        return self;
        !           271: 
        !           272:     [[self _deleteResourceWithKey:IRQ_LEVELS_KEY] free];
        !           273:     [[self _deleteResourceWithKey:MEM_MAPS_KEY] free];
        !           274:     
        !           275:     return [super free];
        !           276: }
        !           277: 
        !           278: @end

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