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/* Copyright (C) 1996-1998 Robert H”hne, see COPYING.RH for details */
/* This file is part of RHIDE. */
/****************************** VGA REGISTERS *******************************/
/*
* Sequencer port and frequently used register indices
*/
#define VGA_SEQUENCER_PORT 0x3c4
#define VGA_SEQUENCER_DATA 0x3c5
#define VGA_WRT_PLANE_ENB_REG 2
#define VGA_MEMORY_MODE_REG 4
/*
* color plane operations
*/
#define VGA_FUNC_SET 0
#define VGA_FUNC_AND 8
#define VGA_FUNC_OR 16
#define VGA_FUNC_XOR 24
/*
* Graphics controller port and frequently used registers
*/
#define VGA_GR_CTRL_PORT 0x3ce
#define VGA_GR_CTRL_DATA 0x3cf
#define VGA_SET_RESET_REG 0
#define VGA_SET_RESET_ENB_REG 1
#define VGA_COLOR_COMP_REG 2
#define VGA_ROT_FN_SEL_REG 3
#define VGA_RD_PLANE_SEL_REG 4
#define VGA_MODE_REG 5
#define VGA_MISC_REG 6
#define VGA_COLOR_DONTC_REG 7
#define VGA_BIT_MASK_REG 8
/*************************** VESA STRUCTURE *********************************/
/*
* The mode information structure (without padding)
This struct is taken from libgrx (vesa.h)
Because I don't want to go into trouble with packing
this struct I reserve only one block of memory and use
macros for accessing the members */
#define _BYTE(_index) _farpeekb(mode_info_selector,_index)
#define _WORD(_index) _farpeekw(mode_info_selector,_index)
/*
typedef struct {
short ModeAttributes CLY_Packed; mode attributes
*/
#define ModeAttributes _WORD(0)
/*
char WinAAttributes CLY_Packed; Window A attributes
char WinBAttributes CLY_Packed; Window B attributes
*/
#define WinAAttributes _BYTE(2)
#define WinBAttributes _BYTE(3)
/*
short WinGranularity CLY_Packed; window granularity
*/
#define WinGranularity _WORD(4)
/*
short WinSize CLY_Packed; window size
*/
#define WinSize _WORD(6)
/*
short WinASegment CLY_Packed; Window A start segment
short WinBSegment CLY_Packed; Window B start segment
*/
#define WinASegment _WORD(8)
#define WinBSegment _WORD(10)
/*
void far (*WinFuncPtr)() CLY_Packed; pointer to window function
short BytesPerScanLine CLY_Packed; bytes per scan line
==== extended and optional information ====
short XResolution CLY_Packed; horizontal resolution
short YResolution CLY_Packed; vertical resolution
char XCharSize CLY_Packed; character cell width
char YCharSize CLY_Packed; character cell height
char NumberOfPlanes CLY_Packed; number of memory planes
*/
#define NumberOfPlanes _BYTE(0x18)
/*
char BitsPerPixel CLY_Packed; bits per pixel
char NumberOfBanks CLY_Packed; number of banks
char MemoryModel CLY_Packed; memory model type
char BankSize CLY_Packed; bank size in K
char NumImagePages CLY_Packed; number of image pages
char reserved[1] CLY_Packed;
==== VESA 1.2 and later ====
char RedMaskSize CLY_Packed; number of bits in red mask
char RedMaskPos CLY_Packed; starting bit for red mask
char GreenMaskSize CLY_Packed;
char GreenMaskPos CLY_Packed;
char BlueMaskSize CLY_Packed;
char BlueMaskPos CLY_Packed;
char ReservedMaskSize CLY_Packed; reserved bits in pixel
char ReservedMaskPos CLY_Packed;
char DirectScreenMode CLY_Packed;
} VESAmodeInfoBlock;
*/
/************************** Inline Helpers **********************************/
__inline__ void
_farfill_l(unsigned short sel,unsigned long offset,unsigned long count,
unsigned long value)
{
__asm__ __volatile__ (
"pushw %%es\n"
"movw %w0,%%es\n"
"cld\n"
"rep\n"
"stosl\n"
"popw %%es"
:
: "rm" (sel), "a" (value), "D" (offset), "c" (count));
}
#define RESTORE_VESA_HARD 1
#define RESTORE_VESA_BIOS 2
#define RESTORE_VESA_COLORS 4
#define RESTORE_VESA_SVGA 8
#define RESTORE_VESA_ALL 0xF
#define RESTORE_VGA_HARD 1
#define RESTORE_VGA_BIOS 2
#define RESTORE_VGA_COLORS 4
#define RESTORE_VGA_ALL 7
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