diff options
Diffstat (limited to 'vgasrc/vgabios.h')
| -rw-r--r-- | vgasrc/vgabios.h | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/vgasrc/vgabios.h b/vgasrc/vgabios.h new file mode 100644 index 00000000..913dd88b --- /dev/null +++ b/vgasrc/vgabios.h @@ -0,0 +1,225 @@ +#ifndef __VGABIOS_H +#define __VGABIOS_H + +#include "types.h" // u8 +#include "farptr.h" // struct segoff_s + +/* + * + * VGA registers + * + */ +#define VGAREG_ACTL_ADDRESS 0x3c0 +#define VGAREG_ACTL_WRITE_DATA 0x3c0 +#define VGAREG_ACTL_READ_DATA 0x3c1 + +#define VGAREG_INPUT_STATUS 0x3c2 +#define VGAREG_WRITE_MISC_OUTPUT 0x3c2 +#define VGAREG_VIDEO_ENABLE 0x3c3 +#define VGAREG_SEQU_ADDRESS 0x3c4 +#define VGAREG_SEQU_DATA 0x3c5 + +#define VGAREG_PEL_MASK 0x3c6 +#define VGAREG_DAC_STATE 0x3c7 +#define VGAREG_DAC_READ_ADDRESS 0x3c7 +#define VGAREG_DAC_WRITE_ADDRESS 0x3c8 +#define VGAREG_DAC_DATA 0x3c9 + +#define VGAREG_READ_FEATURE_CTL 0x3ca +#define VGAREG_READ_MISC_OUTPUT 0x3cc + +#define VGAREG_GRDC_ADDRESS 0x3ce +#define VGAREG_GRDC_DATA 0x3cf + +#define VGAREG_MDA_CRTC_ADDRESS 0x3b4 +#define VGAREG_MDA_CRTC_DATA 0x3b5 +#define VGAREG_VGA_CRTC_ADDRESS 0x3d4 +#define VGAREG_VGA_CRTC_DATA 0x3d5 + +#define VGAREG_MDA_WRITE_FEATURE_CTL 0x3ba +#define VGAREG_VGA_WRITE_FEATURE_CTL 0x3da +#define VGAREG_ACTL_RESET 0x3da + +#define VGAREG_MDA_MODECTL 0x3b8 +#define VGAREG_CGA_MODECTL 0x3d8 +#define VGAREG_CGA_PALETTE 0x3d9 + +/* Video memory */ +#define SEG_GRAPH 0xA000 +#define SEG_CTEXT 0xB800 +#define SEG_MTEXT 0xB000 + +/* + * Tables of default values for each mode + */ +#define TEXT 0x80 + +#define CTEXT (0x00 | TEXT) +#define MTEXT (0x01 | TEXT) +#define CGA 0x02 +#define PLANAR1 0x03 +#define PLANAR4 0x04 +#define LINEAR8 0x05 + +// for SVGA +#define LINEAR15 0x10 +#define LINEAR16 0x11 +#define LINEAR24 0x12 +#define LINEAR32 0x13 + +#define SCREEN_IO_START(x,y,p) (((((x)*(y)) | 0x00ff) + 1) * (p)) +#define SCREEN_MEM_START(x,y,p) SCREEN_IO_START(((x)*2),(y),(p)) + +struct vgamode_s { + u8 svgamode; + u8 memmodel; /* CTEXT,MTEXT,CGA,PL1,PL2,PL4,P8,P15,P16,P24,P32 */ + u8 twidth; + u8 theight; + u8 cheight; + u8 pixbits; + u16 sstart; + u16 slength; + + u8 pelmask; + u8 *dac; + u16 dacsize; + u8 *sequ_regs; + u8 miscreg; + u8 *crtc_regs; + u8 *actl_regs; + u8 *grdc_regs; +}; + +struct saveVideoHardware { + u8 sequ_index; + u8 crtc_index; + u8 grdc_index; + u8 actl_index; + u8 feature; + u8 sequ_regs[4]; + u8 sequ0; + u8 crtc_regs[25]; + u8 actl_regs[20]; + u8 grdc_regs[9]; + u16 crtc_addr; + u8 plane_latch[4]; +}; + +struct saveBDAstate { + u8 video_mode; + u16 video_cols; + u16 video_pagesize; + u16 crtc_address; + u8 video_rows; + u16 char_height; + u8 video_ctl; + u8 video_switches; + u8 modeset_ctl; + u16 cursor_type; + u16 cursor_pos[8]; + u16 video_pagestart; + u8 video_page; + /* current font */ + struct segoff_s font0; + struct segoff_s font1; +}; + +struct saveDACcolors { + u8 rwmode; + u8 peladdr; + u8 pelmask; + u8 dac[768]; + u8 color_select; +}; + +// vgatables.c +struct vgamode_s *find_vga_entry(u8 mode); +void build_video_param(void); +extern struct VideoSavePointer_s video_save_pointer_table; +extern u8 static_functionality[]; + +// vgafonts.c +extern u8 vgafont8[]; +extern u8 vgafont14[]; +extern u8 vgafont16[]; +extern u8 vgafont14alt[]; +extern u8 vgafont16alt[]; + +// vgabios.c +#define SET_VGA(var, val) SET_FARVAR(get_global_seg(), (var), (val)) +struct carattr { + u8 car, attr, use_attr; +}; +struct cursorpos { + u8 x, y, page; +}; +void vga_set_mode(u8 mode, u8 noclearmem); + +// vgafb.c +void clear_screen(struct vgamode_s *vmode_g); +void vgafb_scroll(int nblines, int attr + , struct cursorpos ul, struct cursorpos lr); +void vgafb_write_char(struct cursorpos cp, struct carattr ca); +struct carattr vgafb_read_char(struct cursorpos cp); +void vgafb_write_pixel(u8 color, u16 x, u16 y); +u8 vgafb_read_pixel(u16 x, u16 y); +void vgafb_load_font(u16 seg, void *src_far, u16 count + , u16 start, u8 destflags, u8 fontsize); + +// vgaio.c +void vgahw_screen_disable(void); +void vgahw_screen_enable(void); +void vgahw_set_border_color(u8 color); +void vgahw_set_overscan_border_color(u8 color); +u8 vgahw_get_overscan_border_color(void); +void vgahw_set_palette(u8 palid); +void vgahw_set_single_palette_reg(u8 reg, u8 val); +u8 vgahw_get_single_palette_reg(u8 reg); +void vgahw_set_all_palette_reg(u16 seg, u8 *data_far); +void vgahw_get_all_palette_reg(u16 seg, u8 *data_far); +void vgahw_toggle_intensity(u8 flag); +void vgahw_select_video_dac_color_page(u8 flag, u8 data); +void vgahw_read_video_dac_state(u8 *pmode, u8 *curpage); +void vgahw_set_dac_regs(u16 seg, u8 *data_far, u8 start, int count); +void vgahw_get_dac_regs(u16 seg, u8 *data_far, u8 start, int count); +void vgahw_set_pel_mask(u8 val); +u8 vgahw_get_pel_mask(void); +void vgahw_save_dac_state(u16 seg, struct saveDACcolors *info); +void vgahw_restore_dac_state(u16 seg, struct saveDACcolors *info); +void vgahw_sequ_write(u8 index, u8 value); +void vgahw_grdc_write(u8 index, u8 value); +void vgahw_set_text_block_specifier(u8 spec); +void get_font_access(void); +void release_font_access(void); +void vgahw_set_cursor_shape(u8 start, u8 end); +void vgahw_set_active_page(u16 address); +void vgahw_set_cursor_pos(u16 address); +void vgahw_set_scan_lines(u8 lines); +u16 vgahw_get_vde(void); +void vgahw_save_state(u16 seg, struct saveVideoHardware *info); +void vgahw_restore_state(u16 seg, struct saveVideoHardware *info); +void vgahw_set_mode(struct vgamode_s *vmode_g); +void vgahw_enable_video_addressing(u8 disable); +void vgahw_init(void); + +// clext.c +int cirrus_set_video_mode(u8 mode, u8 noclearmem); +void cirrus_init(void); + +// vbe.c +#define VBE_OEM_STRING "SeaBIOS VBE(C) 2011" +#define VBE_VENDOR_STRING "SeaBIOS Developers" +#define VBE_PRODUCT_STRING "SeaBIOS VBE Adapter" +#define VBE_REVISION_STRING "Rev. 1" + +struct vbe_modeinfo +{ + u16 width; + u16 height; + u8 depth; + u16 linesize; + u32 phys_base; + u32 vram_size; +}; + +#endif // vgabios.h |