178 lines
3.9 KiB
C
178 lines
3.9 KiB
C
/*
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* Copyright 2004-2009, Axel Dörfler, axeld@pinc-software.de.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef VESA_H
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#define VESA_H
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#include <SupportDefs.h>
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/* VBE info block structure */
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#define VESA_SIGNATURE 'ASEV'
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#define VBE2_SIGNATURE '2EBV'
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struct vbe_info_block {
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// VBE 1.x fields
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uint32 signature;
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struct {
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uint8 minor;
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uint8 major;
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} version;
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uint32 oem_string;
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uint32 capabilities;
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uint32 mode_list;
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uint16 total_memory; // in 64k blocks
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// VBE 2.0+ fields only
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// Note, the block is 256 bytes in size for VBE 1.x as well,
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// but doesn't define these fields. VBE 3 doesn't define
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// any additional fields.
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uint16 oem_software_revision;
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uint32 oem_vendor_name_string;
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uint32 oem_product_name_string;
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uint32 oem_product_revision_string;
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uint8 reserved[222];
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uint8 oem_data[256];
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} _PACKED;
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// capabilities
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#define CAPABILITY_DAC_WIDTH 0x01
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#define CAPABILITY_NOT_VGA_COMPATIBLE 0x02
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/* VBE mode info structure */
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struct vbe_mode_info {
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uint16 attributes;
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uint8 window_a_attributes;
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uint8 window_b_attributes;
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uint16 window_granularity;
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uint16 window_size;
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uint16 window_a_segment;
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uint16 window_b_segment;
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uint32 window_function; // real mode pointer
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uint16 bytes_per_row;
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// VBE 1.2 and above
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uint16 width;
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uint16 height;
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uint8 char_width;
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uint8 char_height;
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uint8 num_planes;
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uint8 bits_per_pixel;
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uint8 num_banks;
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uint8 memory_model;
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uint8 bank_size;
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uint8 num_image_pages;
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uint8 _reserved0;
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// direct color fields
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uint8 red_mask_size;
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uint8 red_field_position;
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uint8 green_mask_size;
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uint8 green_field_position;
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uint8 blue_mask_size;
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uint8 blue_field_position;
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uint8 reserved_mask_size;
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uint8 reserved_field_position;
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uint8 direct_color_mode_info;
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// VBE 2.0 and above
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uint32 physical_base;
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uint32 _reserved1;
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uint16 _reserved2;
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// VBE 3.0 and above
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uint16 linear_bytes_per_row;
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uint8 banked_num_image_pages;
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uint8 linear_num_image_pages;
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uint8 linear_red_mask_size;
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uint8 linear_red_field_position;
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uint8 linear_green_mask_size;
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uint8 linear_green_field_position;
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uint8 linear_blue_mask_size;
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uint8 linear_blue_field_position;
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uint8 linear_reserved_mask_size;
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uint8 linear_reserved_field_position;
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uint32 max_pixel_clock; // in Hz
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uint8 _reserved[189];
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} _PACKED;
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// definitions of mode info attributes
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#define MODE_ATTR_AVAILABLE 1
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#define MODE_ATTR_COLOR_MODE 8
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#define MODE_ATTR_GRAPHICS_MODE 16
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#define MODE_ATTR_LINEAR_BUFFER 128
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// memory models
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#define MODE_MEMORY_TEXT 0
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#define MODE_MEMORY_PLANAR 3
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#define MODE_MEMORY_PACKED_PIXEL 4
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#define MODE_MEMORY_DIRECT_COLOR 6
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#define MODE_MEMORY_YUV 7
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// set mode flags
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#define SET_MODE_MASK 0x01ff
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#define SET_MODE_SPECIFY_CRTC (1 << 11)
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#define SET_MODE_LINEAR_BUFFER (1 << 14)
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#define SET_MODE_DONT_CLEAR_MEMORY (1 << 15)
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/* CRTC info block structure */
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struct crtc_info_block {
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uint16 horizontal_total;
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uint16 horizontal_sync_start;
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uint16 horizontal_sync_end;
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uint16 vertical_total;
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uint16 vertical_sync_start;
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uint16 vertical_sync_end;
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uint8 flags;
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uint32 pixel_clock; // in Hz
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uint16 refresh_rate; // in 0.01 Hz
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uint8 _reserved[40];
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} _PACKED;
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#define CRTC_DOUBLE_SCAN 0x01
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#define CRTC_INTERLACED 0x02
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#define CRTC_NEGATIVE_HSYNC 0x04
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#define CRTC_NEGATIVE_VSYNC 0x08
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/* Power Management */
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#define DPMS_ON 0x00
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#define DPMS_STANDBY 0x01
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#define DPMS_SUSPEND 0x02
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#define DPMS_OFF 0x04
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#define DPMS_REDUCED_ON 0x08
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/* VBE 3.0 protected mode interface
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* The BIOS area can be scanned for the protected mode
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* signature that identifies the structure below.
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*/
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#define VBE_PM_SIGNATURE 'DIMP'
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struct vbe_protected_mode_info {
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uint32 signature;
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int16 entry_offset;
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int16 init_offset;
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uint16 data_selector;
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uint16 a000_selector;
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uint16 b000_selector;
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uint16 b800_selector;
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uint16 c000_selector;
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uint8 in_protected_mode;
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uint8 checksum;
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} _PACKED;
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#endif /* VESA_H */
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