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boxvint.h
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/*****************************************************************************
Copyright (c) 2012-2022 Michal Necasek
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*****************************************************************************/
/* Internal definitions used by the boxv library. */
/*-------------- VGA Specific ----------------*/
/* VGA I/O port addresses. */
#define VGA_CRTC 0x3D4 /* Color only! */
#define VGA_ATTR_W 0x3C0
#define VGA_ATTR_R 0x3C1
#define VGA_MISC_OUT_W 0x3C2
#define VGA_SEQUENCER 0x3C4
#define VGA_SEQUENCER_DATA 0x3C5
#define VGA_PIXEL_MASK 0x3C6
#define VGA_DAC_W_INDEX 0x3C8
#define VGA_DAC_DATA 0x3C9
#define VGA_MISC_OUT_R 0x3CC
#define VGA_GRAPH_CNTL 0x3CE
#define VGA_GRAPH_CNTL_DATA 0x3CF
#define VGA_STAT_ADDR 0x3DA /* Color only! */
/* VGA Attribute Controller register indexes. */
#define VGA_AR_MODE 0x10
#define VGA_AR_OVERSCAN 0x11
#define VGA_AR_PLANE_EN 0x12
#define VGA_AR_PIX_PAN 0x13
#define VGA_AR_COLOR_SEL 0x14
/* VGA Graphics Controller register indexes. */
#define VGA_GR_SET_RESET 0x00
#define VGA_GR_DATA_ROTATE 0x03
#define VGA_GR_READ_MAP_SEL 0x04
#define VGA_GR_MODE 0x05
#define VGA_GR_MISC 0x06
#define VGA_GR_BIT_MASK 0x08
/* VGA Sequencer register indexes. */
#define VGA_SR_RESET 0x00
#define VGA_SR_CLK_MODE 0x01
#define VGA_SR_PLANE_MASK 0x02
#define VGA_SR_MEM_MODE 0x04
/* Sequencer constants. */
#define VGA_SR0_NORESET 0x03
#define VGA_SR0_RESET 0x00
#define VGA_SR1_BLANK 0x20
/* VGA CRTC register indexes. */
#define VGA_CR_HORZ_TOTAL 0x00
#define VGA_CR_CUR_START 0x0A
#define VGA_CR_CUR_END 0x0B
#define VGA_CR_START_HI 0x0C
#define VGA_CR_START_LO 0x0D
#define VGA_CR_CUR_POS_HI 0x0E
#define VGA_CR_CUR_POS_LO 0x0F
#define VGA_CR_VSYNC_START 0x10
#define VGA_CR_VSYNC_END 0x11
/* VGA Input Status Register 1 constants. */
#define VGA_STAT_VSYNC 0x08
/*------------ End VGA Specific --------------*/
/*------------- bochs Specific ---------------*/
#define VBE_DISPI_BANK_ADDRESS 0xA0000
#define VBE_DISPI_BANK_SIZE_KB 64
#define VBE_DISPI_MAX_XRES 1024
#define VBE_DISPI_MAX_YRES 768
#define VBE_DISPI_IOPORT_INDEX 0x01CE
#define VBE_DISPI_IOPORT_DATA 0x01CF
#define VBE_DISPI_INDEX_ID 0x0
#define VBE_DISPI_INDEX_XRES 0x1
#define VBE_DISPI_INDEX_YRES 0x2
#define VBE_DISPI_INDEX_BPP 0x3
#define VBE_DISPI_INDEX_ENABLE 0x4
#define VBE_DISPI_INDEX_BANK 0x5
#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
#define VBE_DISPI_INDEX_X_OFFSET 0x8
#define VBE_DISPI_INDEX_Y_OFFSET 0x9
#define VBE_DISPI_INDEX_VBOX_VIDEO 0xa
#define VBE_DISPI_INDEX_FB_BASE_HI 0xb
#define VBE_DISPI_ID0 0xB0C0
#define VBE_DISPI_ID1 0xB0C1
#define VBE_DISPI_ID2 0xB0C2
#define VBE_DISPI_ID3 0xB0C3
#define VBE_DISPI_ID4 0xB0C4
#define VBE_DISPI_DISABLED 0x00
#define VBE_DISPI_ENABLED 0x01
#define VBE_DISPI_GETCAPS 0x02
#define VBE_DISPI_8BIT_DAC 0x20
#define VBE_DISPI_LFB_ENABLED 0x40
#define VBE_DISPI_NOCLEARMEM 0x80
/* Default LFB base. Might be different! */
#define VBE_DISPI_LFB_PHYSICAL_ADDRESS 0xE0000000
/*------------ End bochs Specific -------------*/
typedef unsigned char v_byte;
typedef unsigned short v_word;
/* A structure describing the contents of VGA registers for a mode set. */
typedef struct {
v_byte misc; /* Miscellaneous register. */
v_byte seq[5]; /* Sequencer registers. */
v_byte crtc[25]; /* CRTC registers. */
v_byte gctl[9]; /* Graphics controller registers. */
v_byte atr[21]; /* Attribute registers. */
} v_vgaregs;
/* A structure fully describing a graphics or text mode. */
typedef struct {
int mode_no; /* Internal mode number. */
int xres; /* Horizontal (X) resolution. */
int yres; /* Vertical (Y) resolution. */
int bpp; /* Bits per pixel. */
int ext; /* Non-zero for extended modes. */
v_vgaregs *vgaregs; /* Contents of VGA registers. */
} v_mode;