249 lines
9.1 KiB
C
249 lines
9.1 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2005,2006,2007 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/symbol.h>
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#include <grub/types.h>
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#include <grub/err.h>
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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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/* VBE memory model types. */
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#define GRUB_VBE_MEMORY_MODEL_PACKED_PIXEL 0x04
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#define GRUB_VBE_MEMORY_MODEL_DIRECT_COLOR 0x06
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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 comatibility against specification
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while following naming convetions 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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} __attribute__ ((packed));
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struct grub_vbe_mode_info_block
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{
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/* Mandory 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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/* Mandory 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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/* Mandory 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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/* Mandory 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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} __attribute__ ((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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} __attribute__ ((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 aligment;
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} __attribute__ ((packed));
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/* Prototypes for kernel real mode thunks. */
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/* Call VESA BIOS 0x4f00 to get VBE Controller Information, return status. */
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grub_vbe_status_t EXPORT_FUNC(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 EXPORT_FUNC(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 0x4f02 to set video mode, return status. */
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grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_set_mode) (grub_uint32_t mode,
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struct grub_vbe_crtc_info_block *crtc_info);
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/* Call VESA BIOS 0x4f03 to return current VBE Mode, return status. */
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grub_vbe_status_t EXPORT_FUNC(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 EXPORT_FUNC(grub_vbe_bios_set_memory_window) (grub_uint32_t window,
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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 EXPORT_FUNC(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 EXPORT_FUNC(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 EXPORT_FUNC(grub_vbe_bios_get_scanline_length) (grub_uint32_t *length);
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/* Call VESA BIOS 0x4f07 to set display start, return status. */
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grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_set_display_start) (grub_uint32_t x,
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grub_uint32_t y);
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/* Call VESA BIOS 0x4f07 to get display start, return status. */
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grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_get_display_start) (grub_uint32_t *x,
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grub_uint32_t *y);
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/* Call VESA BIOS 0x4f09 to set palette data, return status. */
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grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_set_palette_data) (grub_uint32_t color_count,
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grub_uint32_t start_index,
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struct grub_vbe_palette_data *palette_data);
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/* Prototypes for helper functions. */
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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_set_video_mode (grub_uint32_t mode,
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struct grub_vbe_mode_info_block *mode_info);
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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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/* VBE module internal prototypes (should not be used from elsewhere). */
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struct grub_video_i386_vbeblit_info;
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struct grub_video_render_target
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{
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/* Copy of the screen's mode info structure, except that width, height and
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mode_type has been re-adjusted to requested render target settings. */
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struct grub_video_mode_info mode_info;
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struct
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{
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unsigned int x;
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unsigned int y;
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unsigned int width;
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unsigned int height;
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} viewport;
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/* Indicates wether the data has been allocated by us and must be freed
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when render target is destroyed. */
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int is_allocated;
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/* Pointer to data. Can either be in video card memory or in local host's
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memory. */
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void *data;
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};
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grub_uint8_t * grub_video_vbe_get_video_ptr (struct grub_video_i386_vbeblit_info *source,
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grub_uint32_t x, grub_uint32_t y);
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grub_video_color_t grub_video_vbe_map_rgb (grub_uint8_t red, grub_uint8_t green,
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grub_uint8_t blue);
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grub_video_color_t grub_video_vbe_map_rgba (grub_uint8_t red,
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grub_uint8_t green,
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grub_uint8_t blue,
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grub_uint8_t alpha);
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void grub_video_vbe_unmap_color (struct grub_video_i386_vbeblit_info *source,
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grub_video_color_t color, grub_uint8_t *red,
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grub_uint8_t *green, grub_uint8_t *blue,
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grub_uint8_t *alpha);
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#endif /* ! GRUB_VBE_MACHINE_HEADER */
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