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Annotation of XNU/iokit/Families/IOGraphics/IOBootFramebuffer.cpp, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * Boot video dumb frambuffer shim
        !            24:  */
        !            25: 
        !            26: #include "IOBootFramebuffer.h"
        !            27: 
        !            28: enum { kTheDisplayMode = 10 };
        !            29: 
        !            30: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !            31: 
        !            32: #undef super
        !            33: #define super IOFramebuffer
        !            34: 
        !            35: OSDefineMetaClassAndStructors(IOBootFramebuffer, IOFramebuffer)
        !            36: 
        !            37: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !            38: 
        !            39: IOService * IOBootFramebuffer::probe(  IOService *     provider,
        !            40:                                         SInt32 *       score )
        !            41: {
        !            42:     PE_Video           bootDisplay;
        !            43:     IOService *                ret = 0;
        !            44:     IOReturn           err;
        !            45: 
        !            46:     do {
        !            47: 
        !            48:         if( !provider->getProperty("AAPL,boot-display"))
        !            49:            continue;
        !            50: 
        !            51:         err = getPlatform()->getConsoleInfo( &bootDisplay );
        !            52:        if( err || (bootDisplay.v_baseAddr == 0))
        !            53:            continue;
        !            54: 
        !            55:        if (false == super::probe( provider, score ))
        !            56:            continue;
        !            57: 
        !            58:        *score          = 0;
        !            59:        ret = this;                     // Success
        !            60: 
        !            61:     } while( false);
        !            62: 
        !            63:     return( ret);
        !            64: }
        !            65: 
        !            66: 
        !            67: const char * IOBootFramebuffer::getPixelFormats( void )
        !            68: {
        !            69:     const char *       ret;
        !            70:     PE_Video           bootDisplay;
        !            71: 
        !            72:     getPlatform()->getConsoleInfo( &bootDisplay);
        !            73: 
        !            74:     switch( bootDisplay.v_depth) {
        !            75:       case 8:
        !            76:       default:
        !            77:        ret = IO8BitIndexedPixels;
        !            78:        break;
        !            79:       case 15:
        !            80:       case 16:
        !            81:        ret = IO16BitDirectPixels;
        !            82:        break;
        !            83:       case 24:
        !            84:       case 32:
        !            85:        ret = IO32BitDirectPixels;
        !            86:        break;
        !            87:     }
        !            88: 
        !            89:     return( ret);
        !            90: }
        !            91: 
        !            92: IOItemCount IOBootFramebuffer::getDisplayModeCount( void )
        !            93: {
        !            94:     return( 1);
        !            95: }
        !            96: 
        !            97: IOReturn IOBootFramebuffer::getDisplayModes(
        !            98:                        IODisplayModeID * allDisplayModes )
        !            99: {
        !           100: 
        !           101:     *allDisplayModes = kTheDisplayMode;
        !           102:     return( kIOReturnSuccess);
        !           103: }
        !           104: 
        !           105: IOReturn IOBootFramebuffer::getInformationForDisplayMode(
        !           106:                IODisplayModeID /* displayMode */,
        !           107:                IODisplayModeInformation * info )
        !           108: {
        !           109:     PE_Video   bootDisplay;
        !           110: 
        !           111:     getPlatform()->getConsoleInfo( &bootDisplay);
        !           112: 
        !           113:     bzero( info, sizeof( *info));
        !           114: 
        !           115:     info->maxDepthIndex        = 0;
        !           116:     info->nominalWidth = bootDisplay.v_width;
        !           117:     info->nominalHeight        = bootDisplay.v_height;
        !           118:     info->refreshRate  = 75 << 16;
        !           119: 
        !           120:     return( kIOReturnSuccess);
        !           121: }
        !           122: 
        !           123: UInt64 IOBootFramebuffer::getPixelFormatsForDisplayMode( 
        !           124:                IODisplayModeID /* displayMode */, IOIndex /* depth */ )
        !           125: {
        !           126:     return( 1);
        !           127: }
        !           128: 
        !           129: IOReturn IOBootFramebuffer::getPixelInformation(
        !           130:        IODisplayModeID displayMode, IOIndex depth,
        !           131:        IOPixelAperture aperture, IOPixelInformation * info )
        !           132: {
        !           133:     PE_Video   bootDisplay;
        !           134: 
        !           135:     if( aperture || depth || (displayMode != kTheDisplayMode) )
        !           136:         return( kIOReturnUnsupportedMode);
        !           137: 
        !           138:     getPlatform()->getConsoleInfo( &bootDisplay);
        !           139: 
        !           140:     bzero( info, sizeof( *info));
        !           141: 
        !           142:     info->activeWidth          = bootDisplay.v_width;
        !           143:     info->activeHeight         = bootDisplay.v_height;
        !           144:     info->bytesPerRow           = bootDisplay.v_rowBytes & 0x7fff;
        !           145:     info->bytesPerPlane                = 0;
        !           146: 
        !           147:     switch( bootDisplay.v_depth ) {
        !           148:       case 8:
        !           149:       default:
        !           150:         strcpy(info->pixelFormat, IO8BitIndexedPixels );
        !           151:     info->pixelType            = kIOCLUTPixels;
        !           152:     info->componentMasks[0]    = 0xff;
        !           153:     info->bitsPerPixel                 = 8;
        !           154:     info->componentCount       = 1;
        !           155:     info->bitsPerComponent     = 8;
        !           156:        break;
        !           157:       case 15:
        !           158:       case 16:
        !           159:         strcpy(info->pixelFormat, IO16BitDirectPixels );
        !           160:         info->pixelType        = kIORGBDirectPixels;
        !           161:         info->componentMasks[0] = 0x7c00;
        !           162:         info->componentMasks[1] = 0x03e0;
        !           163:         info->componentMasks[2] = 0x001f;
        !           164:         info->bitsPerPixel     = 16;
        !           165:         info->componentCount   = 3;
        !           166:         info->bitsPerComponent = 5;
        !           167:        break;
        !           168:       case 24:
        !           169:       case 32:
        !           170:         strcpy(info->pixelFormat, IO32BitDirectPixels );
        !           171:         info->pixelType        = kIORGBDirectPixels;
        !           172:         info->componentMasks[0] = 0x00ff0000;
        !           173:         info->componentMasks[1] = 0x0000ff00;
        !           174:         info->componentMasks[2] = 0x000000ff;
        !           175:         info->bitsPerPixel     = 32;
        !           176:         info->componentCount   = 3;
        !           177:         info->bitsPerComponent = 8;
        !           178:        break;
        !           179:     }
        !           180: 
        !           181:     return( kIOReturnSuccess);
        !           182: }
        !           183: 
        !           184: IOReturn IOBootFramebuffer::getCurrentDisplayMode( 
        !           185:                IODisplayModeID * displayMode, IOIndex * depth )
        !           186: {
        !           187:     if( displayMode)
        !           188:        *displayMode = kTheDisplayMode;
        !           189:     if( depth)
        !           190:        *depth = 0;
        !           191: 
        !           192:     return( kIOReturnSuccess);
        !           193: }
        !           194: 
        !           195: IODeviceMemory * IOBootFramebuffer::getApertureRange( IOPixelAperture aper )
        !           196: {
        !           197:     IOReturn                   err;
        !           198:     IOPixelInformation         info;
        !           199:     IOByteCount                        bytes;
        !           200:     PE_Video                   bootDisplay;
        !           201: 
        !           202:     getPlatform()->getConsoleInfo( &bootDisplay);
        !           203: 
        !           204:     err = getPixelInformation( kTheDisplayMode, 0, aper,
        !           205:                                 &info );
        !           206:     if( err)
        !           207:        return( 0 );
        !           208: 
        !           209:     bytes = (info.bytesPerRow * info.activeHeight) + 128;
        !           210: 
        !           211:     return( IODeviceMemory::withRange( bootDisplay.v_baseAddr, bytes ));
        !           212: }
        !           213: 
        !           214: bool IOBootFramebuffer::isConsoleDevice( void )
        !           215: {
        !           216:     return( (0 != getProvider()->getProperty("AAPL,boot-display")) );
        !           217: }

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