233 lines
8.1 KiB
C
233 lines
8.1 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2005,2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_VBE_MACHINE_HEADER
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#define GRUB_VBE_MACHINE_HEADER 1
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#include <grub/video.h>
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/* Default video mode to be used. */
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#define GRUB_VBE_DEFAULT_VIDEO_MODE 0x101
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/* VBE status codes. */
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#define GRUB_VBE_STATUS_OK 0x004f
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#define GRUB_VBE_CAPABILITY_DACWIDTH (1 << 0)
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/* Bits from the GRUB_VBE "mode_attributes" field in the mode info struct. */
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#define GRUB_VBE_MODEATTR_SUPPORTED (1 << 0)
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#define GRUB_VBE_MODEATTR_RESERVED_1 (1 << 1)
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#define GRUB_VBE_MODEATTR_BIOS_TTY_OUTPUT_SUPPORT (1 << 2)
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#define GRUB_VBE_MODEATTR_COLOR (1 << 3)
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#define GRUB_VBE_MODEATTR_GRAPHICS (1 << 4)
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#define GRUB_VBE_MODEATTR_VGA_COMPATIBLE (1 << 5)
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#define GRUB_VBE_MODEATTR_VGA_WINDOWED_AVAIL (1 << 6)
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#define GRUB_VBE_MODEATTR_LFB_AVAIL (1 << 7)
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#define GRUB_VBE_MODEATTR_DOUBLE_SCAN_AVAIL (1 << 8)
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#define GRUB_VBE_MODEATTR_INTERLACED_AVAIL (1 << 9)
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#define GRUB_VBE_MODEATTR_TRIPLE_BUF_AVAIL (1 << 10)
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#define GRUB_VBE_MODEATTR_STEREO_AVAIL (1 << 11)
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#define GRUB_VBE_MODEATTR_DUAL_DISPLAY_START (1 << 12)
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/* Values for the GRUB_VBE memory_model field in the mode info struct. */
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#define GRUB_VBE_MEMORY_MODEL_TEXT 0x00
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#define GRUB_VBE_MEMORY_MODEL_CGA 0x01
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#define GRUB_VBE_MEMORY_MODEL_HERCULES 0x02
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#define GRUB_VBE_MEMORY_MODEL_PLANAR 0x03
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#define GRUB_VBE_MEMORY_MODEL_PACKED_PIXEL 0x04
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#define GRUB_VBE_MEMORY_MODEL_NONCHAIN4_256 0x05
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#define GRUB_VBE_MEMORY_MODEL_DIRECT_COLOR 0x06
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#define GRUB_VBE_MEMORY_MODEL_YUV 0x07
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/* Note:
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Please refer to VESA BIOS Extension 3.0 Specification for more descriptive
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meanings of following structures and how they should be used.
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I have tried to maintain field name compatibility against specification
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while following naming conventions used in GRUB. */
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typedef grub_uint32_t grub_vbe_farptr_t;
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typedef grub_uint32_t grub_vbe_physptr_t;
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typedef grub_uint32_t grub_vbe_status_t;
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struct grub_vbe_info_block
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{
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grub_uint8_t signature[4];
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grub_uint16_t version;
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grub_vbe_farptr_t oem_string_ptr;
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grub_uint32_t capabilities;
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grub_vbe_farptr_t video_mode_ptr;
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grub_uint16_t total_memory;
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grub_uint16_t oem_software_rev;
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grub_vbe_farptr_t oem_vendor_name_ptr;
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grub_vbe_farptr_t oem_product_name_ptr;
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grub_vbe_farptr_t oem_product_rev_ptr;
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grub_uint8_t reserved[222];
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grub_uint8_t oem_data[256];
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} GRUB_PACKED;
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struct grub_vbe_mode_info_block
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{
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/* Mandatory information for all VBE revisions. */
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grub_uint16_t mode_attributes;
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grub_uint8_t win_a_attributes;
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grub_uint8_t win_b_attributes;
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grub_uint16_t win_granularity;
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grub_uint16_t win_size;
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grub_uint16_t win_a_segment;
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grub_uint16_t win_b_segment;
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grub_vbe_farptr_t win_func_ptr;
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grub_uint16_t bytes_per_scan_line;
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/* Mandatory information for VBE 1.2 and above. */
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grub_uint16_t x_resolution;
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grub_uint16_t y_resolution;
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grub_uint8_t x_char_size;
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grub_uint8_t y_char_size;
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grub_uint8_t number_of_planes;
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grub_uint8_t bits_per_pixel;
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grub_uint8_t number_of_banks;
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grub_uint8_t memory_model;
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grub_uint8_t bank_size;
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grub_uint8_t number_of_image_pages;
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grub_uint8_t reserved;
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/* Direct Color fields (required for direct/6 and YUV/7 memory models). */
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grub_uint8_t red_mask_size;
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grub_uint8_t red_field_position;
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grub_uint8_t green_mask_size;
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grub_uint8_t green_field_position;
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grub_uint8_t blue_mask_size;
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grub_uint8_t blue_field_position;
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grub_uint8_t rsvd_mask_size;
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grub_uint8_t rsvd_field_position;
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grub_uint8_t direct_color_mode_info;
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/* Mandatory information for VBE 2.0 and above. */
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grub_vbe_physptr_t phys_base_addr;
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grub_uint32_t reserved2;
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grub_uint16_t reserved3;
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/* Mandatory information for VBE 3.0 and above. */
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grub_uint16_t lin_bytes_per_scan_line;
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grub_uint8_t bnk_number_of_image_pages;
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grub_uint8_t lin_number_of_image_pages;
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grub_uint8_t lin_red_mask_size;
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grub_uint8_t lin_red_field_position;
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grub_uint8_t lin_green_mask_size;
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grub_uint8_t lin_green_field_position;
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grub_uint8_t lin_blue_mask_size;
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grub_uint8_t lin_blue_field_position;
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grub_uint8_t lin_rsvd_mask_size;
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grub_uint8_t lin_rsvd_field_position;
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grub_uint32_t max_pixel_clock;
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/* Reserved field to make structure to be 256 bytes long, VESA BIOS
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Extension 3.0 Specification says to reserve 189 bytes here but
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that doesn't make structure to be 256 bytes. So additional one is
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added here. */
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grub_uint8_t reserved4[189 + 1];
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} GRUB_PACKED;
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struct grub_vbe_crtc_info_block
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{
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grub_uint16_t horizontal_total;
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grub_uint16_t horizontal_sync_start;
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grub_uint16_t horizontal_sync_end;
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grub_uint16_t vertical_total;
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grub_uint16_t vertical_sync_start;
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grub_uint16_t vertical_sync_end;
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grub_uint8_t flags;
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grub_uint32_t pixel_clock;
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grub_uint16_t refresh_rate;
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grub_uint8_t reserved[40];
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} GRUB_PACKED;
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struct grub_vbe_palette_data
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{
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grub_uint8_t blue;
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grub_uint8_t green;
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grub_uint8_t red;
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grub_uint8_t alignment;
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} GRUB_PACKED;
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struct grub_vbe_flat_panel_info
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{
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grub_uint16_t horizontal_size;
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grub_uint16_t vertical_size;
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grub_uint16_t panel_type;
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grub_uint8_t red_bpp;
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grub_uint8_t green_bpp;
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grub_uint8_t blue_bpp;
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grub_uint8_t reserved_bpp;
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grub_uint32_t reserved_offscreen_mem_size;
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grub_vbe_farptr_t reserved_offscreen_mem_ptr;
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grub_uint8_t reserved[14];
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} GRUB_PACKED;
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/* Prototypes for helper functions. */
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/* Call VESA BIOS 0x4f00 to get VBE Controller Information, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_controller_info (struct grub_vbe_info_block *controller_info);
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/* Call VESA BIOS 0x4f01 to get VBE Mode Information, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_mode_info (grub_uint32_t mode,
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struct grub_vbe_mode_info_block *mode_info);
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/* Call VESA BIOS 0x4f03 to return current VBE Mode, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_mode (grub_uint32_t *mode);
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/* Call VESA BIOS 0x4f05 to set memory window, return status. */
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grub_vbe_status_t
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grub_vbe_bios_set_memory_window (grub_uint32_t window, grub_uint32_t position);
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/* Call VESA BIOS 0x4f05 to return memory window, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_memory_window (grub_uint32_t window,
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grub_uint32_t *position);
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/* Call VESA BIOS 0x4f06 to set scanline length (in bytes), return status. */
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grub_vbe_status_t
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grub_vbe_bios_set_scanline_length (grub_uint32_t length);
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/* Call VESA BIOS 0x4f06 to return scanline length (in bytes), return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_scanline_length (grub_uint32_t *length);
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/* Call VESA BIOS 0x4f07 to get display start, return status. */
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grub_vbe_status_t
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grub_vbe_bios_get_display_start (grub_uint32_t *x,
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grub_uint32_t *y);
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grub_vbe_status_t grub_vbe_bios_getset_dac_palette_width (int set, int *width);
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#define grub_vbe_bios_get_dac_palette_width(width) grub_vbe_bios_getset_dac_palette_width(0, (width))
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#define grub_vbe_bios_set_dac_palette_width(width) grub_vbe_bios_getset_dac_palette_width(1, (width))
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grub_err_t grub_vbe_probe (struct grub_vbe_info_block *info_block);
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grub_err_t grub_vbe_get_video_mode (grub_uint32_t *mode);
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grub_err_t grub_vbe_get_video_mode_info (grub_uint32_t mode,
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struct grub_vbe_mode_info_block *mode_info);
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grub_vbe_status_t
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grub_vbe_bios_get_pm_interface (grub_uint16_t *seg, grub_uint16_t *offset,
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grub_uint16_t *length);
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#endif /* ! GRUB_VBE_MACHINE_HEADER */
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