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Annotation of driverkit/libDriver/pcmcia/IOPCMCIADirectDevice.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) 1994 NeXT Computer, Inc.
        !            26:  *
        !            27:  * PCMCIA direct device implementation.
        !            28:  *
        !            29:  * HISTORY
        !            30:  *
        !            31:  * 17 May 1994 Curtis Galloway at NeXT
        !            32:  *     Created.
        !            33:  *
        !            34:  *
        !            35:  */
        !            36: 
        !            37: #define KERNEL_PRIVATE 1
        !            38: 
        !            39: #import <driverkit/i386/IOPCMCIADirectDevice.h>
        !            40: #import <driverkit/IODirectDevicePrivate.h>
        !            41: 
        !            42: #import <driverkit/KernDeviceDescription.h>
        !            43: #import <driverkit/i386/PCMCIAKernBus.h>
        !            44: #import <driverkit/KernBusMemory.h>
        !            45: #import <driverkit/KernDevice.h>
        !            46: #import <driverkit/KernDeviceDescription.h>
        !            47: #import <driverkit/i386/PCMCIAPool.h>
        !            48: 
        !            49: #define ATTRIBUTE_MAPPING_KEY  "PCMCIA_DEVICE_ATTR_MAPPING"
        !            50: 
        !            51: @implementation IODirectDevice(IOPCMCIADirectDevice)
        !            52: 
        !            53: - (IOReturn) mapAttributeMemoryTo:(vm_address_t *) destAddr
        !            54:                        findSpace:(BOOL) findSpace
        !            55: {
        !            56:        struct _eisa_private            *private = _busPrivate;
        !            57:        id                              mapping, mappingList;
        !            58:        id                              resource;
        !            59:        id                              socketElement;
        !            60:        id                              memWindowElement, memWindow;
        !            61:        id                              windowList;
        !            62:        Range                           memRange;
        !            63:        id                              thePCMCIABus;
        !            64:                                        
        !            65:        thePCMCIABus = [KernBus lookupBusInstanceWithName:"PCMCIA" busId:0];
        !            66:        
        !            67:        if ([_deviceDescriptionDelegate
        !            68:            resourcesForKey:ATTRIBUTE_MAPPING_KEY]) {
        !            69:                return IO_R_BUSY;
        !            70:        }
        !            71:        /* Get memory window */
        !            72:        socketElement = [[_deviceDescriptionDelegate
        !            73:            resourcesForKey:PCMCIA_SOCKET_LIST] objectAt:0];
        !            74:        if (socketElement == nil)
        !            75:                return IO_R_RESOURCE;
        !            76:        memWindowElement = [thePCMCIABus allocMemoryWindowForSocket:
        !            77:            [socketElement object]];
        !            78:        if (memWindowElement == nil)
        !            79:                return IO_R_RESOURCE;
        !            80:        windowList = [_deviceDescriptionDelegate
        !            81:            resourcesForKey:PCMCIA_WINDOW_LIST];
        !            82:        
        !            83:        resource = [thePCMCIABus memoryRangeResource];
        !            84:        
        !            85:        if (findSpace)
        !            86:                mapping =
        !            87:                    [resource mapInTarget:current_task_EXTERNAL()
        !            88:                              cache:NO];
        !            89:        else
        !            90:                mapping =
        !            91:                    [resource mapToAddress:*destAddr
        !            92:                              inTarget:current_task_EXTERNAL()
        !            93:                              cache:NO];
        !            94: 
        !            95:        if (mapping == nil) {
        !            96:                [memWindowElement free];
        !            97:                return IO_R_NO_MEMORY;
        !            98:        }
        !            99:                
        !           100:        *destAddr = [mapping address];
        !           101: 
        !           102:        mappingList = [[List alloc] initCount:1];
        !           103:        [mappingList addObject:mapping];
        !           104:        [_deviceDescriptionDelegate
        !           105:            setResources:mappingList forKey:ATTRIBUTE_MAPPING_KEY];
        !           106: 
        !           107:        memWindow = [memWindowElement object];
        !           108:        memRange = [resource range];
        !           109:        [memWindow setEnabled:NO];
        !           110:        [memWindow setMemoryInterface:YES];
        !           111:        [memWindow setAttributeMemory:YES];
        !           112:        [memWindow setMapWithSize:memRange.length
        !           113:                systemAddress:memRange.base cardAddress:0];
        !           114:        [memWindow setEnabled:YES];
        !           115:        [[memWindow socket] setMemoryInterface:YES];
        !           116: 
        !           117:        [windowList addObject:memWindowElement];
        !           118: 
        !           119:        return IO_R_SUCCESS;
        !           120: }
        !           121: 
        !           122: - (void) unmapAttributeMemory
        !           123: {
        !           124:        struct _eisa_private            *private = _busPrivate;
        !           125:        id                              windowList;
        !           126:        int                             i;
        !           127: 
        !           128:        if ([_deviceDescriptionDelegate
        !           129:            resourcesForKey:ATTRIBUTE_MAPPING_KEY] == nil)
        !           130:                return;
        !           131: 
        !           132:        /* Find the memory window */
        !           133:        windowList = [_deviceDescriptionDelegate
        !           134:            resourcesForKey:PCMCIA_WINDOW_LIST];
        !           135:        
        !           136:        for (i=0; i < [windowList count]; i++) {
        !           137:            id window, windowElement;
        !           138:            
        !           139:            windowElement = [windowList objectAt:i];
        !           140:            window = [windowElement object];
        !           141:            if ([window memoryInterface] && [window attributeMemory]) {
        !           142:                /* Right now there is only one attribute memory window allowed,
        !           143:                 * so assume this is the right one.
        !           144:                 */
        !           145:                [window setAttributeMemory:NO];
        !           146:                [window setEnabled:NO];
        !           147:                [[window socket] setMemoryInterface:NO];
        !           148:                [windowList removeObject:windowElement];
        !           149:                [windowElement free];
        !           150:                break;
        !           151:            }
        !           152:        }
        !           153:        
        !           154:        /* This will free the mapping */
        !           155:        [_deviceDescriptionDelegate
        !           156:            removeResourcesForKey:ATTRIBUTE_MAPPING_KEY];
        !           157: }
        !           158: 
        !           159: @end
        !           160: 

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