| 1 | /* ----------------------------------------------------------------------- * |
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| 2 | * |
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| 3 | * Copyright 1999-2008 H. Peter Anvin - All Rights Reserved |
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| 4 | * |
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| 5 | * Permission is hereby granted, free of charge, to any person |
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| 6 | * obtaining a copy of this software and associated documentation |
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| 7 | * files (the "Software"), to deal in the Software without |
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| 8 | * restriction, including without limitation the rights to use, |
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| 9 | * copy, modify, merge, publish, distribute, sublicense, and/or |
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| 10 | * sell copies of the Software, and to permit persons to whom |
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| 11 | * the Software is furnished to do so, subject to the following |
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| 12 | * conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice shall |
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| 15 | * be included in all copies or substantial portions of the Software. |
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| 16 | * |
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| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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| 18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
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| 19 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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| 20 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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| 21 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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| 22 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 23 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 24 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | * |
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| 26 | * ----------------------------------------------------------------------- */ |
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| 27 | |
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| 28 | #ifndef LIB_SYS_VESA_H |
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| 29 | #define LIB_SYS_VESA_H |
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| 30 | |
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| 31 | #include <inttypes.h> |
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| 32 | #include <com32.h> |
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| 33 | |
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| 34 | /* VESA General Information table */ |
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| 35 | struct vesa_general_info { |
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| 36 | uint32_t signature; /* Magic number = "VESA" */ |
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| 37 | uint16_t version; |
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| 38 | far_ptr_t vendor_string; |
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| 39 | uint8_t capabilities[4]; |
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| 40 | far_ptr_t video_mode_ptr; |
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| 41 | uint16_t total_memory; |
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| 42 | |
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| 43 | uint16_t oem_software_rev; |
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| 44 | far_ptr_t oem_vendor_name_ptr; |
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| 45 | far_ptr_t oem_product_name_ptr; |
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| 46 | far_ptr_t oem_product_rev_ptr; |
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| 47 | |
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| 48 | uint8_t reserved[222]; |
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| 49 | uint8_t oem_data[256]; |
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| 50 | } __attribute__ ((packed)); |
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| 51 | |
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| 52 | #define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24)) |
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| 53 | #define VBE2_MAGIC ('V' + ('B' << 8) + ('E' << 16) + ('2' << 24)) |
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| 54 | |
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| 55 | struct vesa_mode_info { |
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| 56 | uint16_t mode_attr; |
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| 57 | uint8_t win_attr[2]; |
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| 58 | uint16_t win_grain; |
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| 59 | uint16_t win_size; |
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| 60 | uint16_t win_seg[2]; |
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| 61 | far_ptr_t win_scheme; |
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| 62 | uint16_t logical_scan; |
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| 63 | |
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| 64 | uint16_t h_res; |
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| 65 | uint16_t v_res; |
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| 66 | uint8_t char_width; |
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| 67 | uint8_t char_height; |
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| 68 | uint8_t memory_planes; |
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| 69 | uint8_t bpp; |
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| 70 | uint8_t banks; |
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| 71 | uint8_t memory_layout; |
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| 72 | uint8_t bank_size; |
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| 73 | uint8_t image_pages; |
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| 74 | uint8_t page_function; |
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| 75 | |
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| 76 | uint8_t rmask; |
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| 77 | uint8_t rpos; |
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| 78 | uint8_t gmask; |
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| 79 | uint8_t gpos; |
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| 80 | uint8_t bmask; |
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| 81 | uint8_t bpos; |
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| 82 | uint8_t resv_mask; |
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| 83 | uint8_t resv_pos; |
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| 84 | uint8_t dcm_info; |
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| 85 | |
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| 86 | uint8_t *lfb_ptr; /* Linear frame buffer address */ |
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| 87 | uint8_t *offscreen_ptr; /* Offscreen memory address */ |
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| 88 | uint16_t offscreen_size; |
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| 89 | |
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| 90 | uint8_t reserved[206]; |
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| 91 | } __attribute__ ((packed)); |
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| 92 | |
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| 93 | struct vesa_info { |
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| 94 | struct vesa_general_info gi; |
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| 95 | struct vesa_mode_info mi; |
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| 96 | }; |
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| 97 | |
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| 98 | extern struct vesa_info vesa_info; |
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| 99 | |
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| 100 | #endif /* LIB_SYS_VESA_H */ |
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