1 /* $NetBSD: vbe.h,v 1.3 2011/02/09 04:37:54 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 Jared D. McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #define VBE_DEFAULT_MODE 0x101 /* 640x480x8 */ 30 31 struct vbeinfoblock { 32 char VbeSignature[4]; 33 uint16_t VbeVersion; 34 uint32_t OemStringPtr; 35 uint32_t Capabilities; 36 uint32_t VideoModePtr; 37 uint16_t TotalMemory; 38 uint16_t OemSoftwareRev; 39 uint32_t OemVendorNamePtr, OemProductNamePtr, OemProductRevPtr; 40 /* data area, in total max 512 bytes for VBE 2.0 */ 41 uint8_t Reserved[222]; 42 uint8_t OemData[256]; 43 } __packed; 44 45 struct modeinfoblock { 46 /* Mandatory information for all VBE revisions */ 47 uint16_t ModeAttributes; 48 uint8_t WinAAttributes, WinBAttributes; 49 uint16_t WinGranularity, WinSize, WinASegment, WinBSegment; 50 uint32_t WinFuncPtr; 51 uint16_t BytesPerScanLine; 52 /* Mandatory information for VBE 1.2 and above */ 53 uint16_t XResolution, YResolution; 54 uint8_t XCharSize, YCharSize, NumberOfPlanes, BitsPerPixel; 55 uint8_t NumberOfBanks, MemoryModel, BankSize, NumberOfImagePages; 56 uint8_t Reserved1; 57 /* Direct Color fields 58 (required for direct/6 and YUV/7 memory models) */ 59 uint8_t RedMaskSize, RedFieldPosition; 60 uint8_t GreenMaskSize, GreenFieldPosition; 61 uint8_t BlueMaskSize, BlueFieldPosition; 62 uint8_t RsvdMaskSize, RsvdFieldPosition; 63 uint8_t DirectColorModeInfo; 64 /* Mandatory information for VBE 2.0 and above */ 65 uint32_t PhysBasePtr; 66 uint32_t OffScreenMemOffset; /* reserved in VBE 3.0 and above */ 67 uint16_t OffScreenMemSize; /* reserved in VBE 3.0 and above */ 68 69 /* Mandatory information for VBE 3.0 and above */ 70 uint16_t LinBytesPerScanLine; 71 uint8_t BnkNumberOfImagePages; 72 uint8_t LinNumberOfImagePages; 73 uint8_t LinRedMaskSize, LinRedFieldPosition; 74 uint8_t LinGreenMaskSize, LinGreenFieldPosition; 75 uint8_t LinBlueMaskSize, LinBlueFieldPosition; 76 uint8_t LinRsvdMaskSize, LinRsvdFieldPosition; 77 uint32_t MaxPixelClock; 78 uint8_t Reserved4[189]; 79 } __packed; 80 81 struct paletteentry { 82 uint8_t Blue; 83 uint8_t Green; 84 uint8_t Red; 85 uint8_t Alignment; 86 } __packed; 87 88 /* EDID */ 89 #define EDID_MAGIC { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 } 90 #define EDID_DESC_BLOCK 0x36 91 92 /* low-level VBE calls, from biosvbe.S */ 93 int biosvbe_info(struct vbeinfoblock *); 94 int biosvbe_set_mode(int); 95 int biosvbe_get_mode_info(int, struct modeinfoblock *); 96 int biosvbe_palette_format(int); 97 int biosvbe_palette_data(int, int, struct paletteentry *); 98 int biosvbe_ddc_caps(void); 99 int biosvbe_ddc_read_edid(int, void *); 100 101 /* high-level VBE helpers, from vbe.c */ 102 void vbe_init(void); 103 int vbe_commit(void); 104 int vbe_available(void); 105 int vbe_set_mode(int); 106 int vbe_set_palette(const uint8_t *, int); 107 void vbe_modelist(void); 108 109 void command_vesa(char *); 110 111 /* adjust physical address; boot code runs with %ds having a 64k offset */ 112 #define VBEPHYPTR(x) ((uint8_t *)((x) - (64 * 1024))) 113