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/*
VESA VBE 2.0 compatible structures and definitions.
You can redistribute this file under terms and conditions
GNU General Public licence v2.
Written by Nick Kurshev <nickols_k@mail.ru>
*/
#ifndef __VESA_VBELIB_INCLUDED__
#define __VESA_VBELIB_INCLUDED__ 1
/* Note: every pointer within structures is 32-bit protected mode pointer.
So you don't need to convert it from real mode. */
typedef struct tagFarPtr
{
unsigned short off;
unsigned short seg;
}FarPtr;
struct VbeInfoBlock {
char VESASignature[4]; /* 'VESA' 4 byte signature */
short VESAVersion; /* VBE version number */
char * OemStringPtr; /* Pointer to OEM string */
long Capabilities; /* Capabilities of video card */
unsigned short* VideoModePtr; /* Pointer to supported modes */
short TotalMemory; /* Number of 64kb memory blocks */
/* VBE 3.0 and above */
short OemSoftwareRev;
char * OemVendorNamePtr;
char * OemProductNamePtr;
char * OemProductRevPtr;
char reserved[222];
char OemData[256]; /* Pad to 512 byte block size */
}__attribute__ ((packed));
static inline FarPtr VirtToPhys(void *ptr)
{
FarPtr retval;
retval.seg = ((unsigned long)ptr) >> 4;
retval.off = ((unsigned long)ptr) & 0x0f;
return retval;
}
static inline unsigned short VirtToPhysSeg(void *ptr)
{
return ((unsigned long)ptr) >> 4;
}
static inline unsigned short VirtToPhysOff(void *ptr)
{
return ((unsigned long)ptr) & 0x0f;
}
static inline void * PhysToVirt(FarPtr ptr)
{
return (void *)((ptr.seg << 4) | ptr.off);
}
static inline void * PhysToVirtSO(unsigned short seg,unsigned short off)
{
return (void *)((seg << 4) | off);
}
#define MODE_ATTR_MODE_SUPPORTED (1 << 0)
#define MODE_ATTR_TTY (1 << 2)
#define MODE_ATTR_COLOR (1 << 3)
#define MODE_ATTR_GRAPHICS (1 << 4)
#define MODE_ATTR_NOT_VGA (1 << 5)
#define MODE_ATTR_NOT_WINDOWED (1 << 6)
#define MODE_ATTR_LINEAR (1 << 7)
#define MODE_ATTR_DOUBLESCAN (1 << 8)
#define MODE_ATTR_INTERLACE (1 << 9)
#define MODE_ATTR_TRIPLEBUFFER (1 << 10)
#define MODE_ATTR_STEREOSCOPIC (1 << 11)
#define MODE_ATTR_DUALDISPLAY (1 << 12)
#define MODE_WIN_RELOCATABLE (1 << 0)
#define MODE_WIN_READABLE (1 << 1)
#define MODE_WIN_WRITEABLE (1 << 2)
/* SuperVGA mode information block */
struct VesaModeInfoBlock {
unsigned short ModeAttributes; /* Mode attributes */
unsigned char WinAAttributes; /* Window A attributes */
unsigned char WinBAttributes; /* Window B attributes */
unsigned short WinGranularity; /* Window granularity in k */
unsigned short WinSize; /* Window size in k */
unsigned short WinASegment; /* Window A segment */
unsigned short WinBSegment; /* Window B segment */
FarPtr WinFuncPtr; /* 16-bit far pointer to window function */
unsigned short BytesPerScanLine; /* Bytes per scanline */
/* VBE 1.2 and above */
unsigned short XResolution; /* Horizontal resolution */
unsigned short YResolution; /* Vertical resolution */
unsigned char XCharSize; /* Character cell width */
unsigned char YCharSize; /* Character cell height */
unsigned char NumberOfPlanes; /* Number of memory planes */
unsigned char BitsPerPixel; /* Bits per pixel */
unsigned char NumberOfBanks; /* Number of CGA style banks */
unsigned char MemoryModel; /* Memory model type */
unsigned char BankSize; /* Size of CGA style banks */
unsigned char NumberOfImagePages; /* Number of images pages */
unsigned char res1; /* Reserved */
/* Direct Color fields (required for direct/6 and YUV/7 memory models) */
unsigned char RedMaskSize; /* Size of direct color red mask */
unsigned char RedFieldPosition; /* Bit posn of lsb of red mask */
unsigned char GreenMaskSize; /* Size of direct color green mask */
unsigned char GreenFieldPosition; /* Bit posn of lsb of green mask */
unsigned char BlueMaskSize; /* Size of direct color blue mask */
unsigned char BlueFieldPosition; /* Bit posn of lsb of blue mask */
unsigned char RsvdMaskSize; /* Size of direct color res mask */
unsigned char RsvdFieldPosition; /* Bit posn of lsb of res mask */
unsigned char DirectColorModeInfo; /* Direct color mode attributes */
unsigned char res2[216]; /* Pad to 256 byte block size */
/* VBE 2.0 and above */
unsigned long PhysBasePtr; /* physical address for flat memory frame buffer. (Should be converted to linear before using) */
unsigned short res3[3]; /* Reserved - always set to 0 */
/* VBE 3.0 and above */
unsigned short LinBytesPerScanLine; /* bytes per scan line for linear modes */
unsigned char BnkNumberOfImagePages;/* number of images for banked modes */
unsigned char LinNumberOfImagePages;/* number of images for linear modes */
unsigned char LinRedMaskSize; /* size of direct color red mask (linear modes) */
unsigned char LinRedFieldPosition; /* bit position of lsb of red mask (linear modes) */
unsigned char LinGreenMaskSize; /* size of direct color green mask (linear modes) */
unsigned char LinGreenFieldPosition;/* bit position of lsb of green mask (linear modes) */
unsigned char LinBlueMaskSize; /* size of direct color blue mask (linear modes) */
unsigned char LinBlueFieldPosition;/* bit position of lsb of blue mask (linear modes) */
unsigned char LinRsvdMaskSize; /* size of direct color reserved mask (linear modes) */
unsigned char LinRsvdFieldPosition;/* bit position of lsb of reserved mask (linear modes) */
unsigned long MaxPixelClock; /* maximum pixel clock (in Hz) for graphics mode */
char res4[189]; /* remainder of ModeInfoBlock */
}__attribute__ ((packed));
typedef enum {
memText= 0,
memCGA = 1,
memHercules = 2,
memPL = 3, /* Planar memory model */
memPK = 4, /* Packed pixel memory model */
mem256 = 5,
memRGB = 6, /* Direct color RGB memory model */
memYUV = 7, /* Direct color YUV memory model */
} memModels;
struct VesaCRTCInfoBlock {
unsigned short hTotal; /* Horizontal total in pixels */
unsigned short hSyncStart; /* Horizontal sync start in pixels */
unsigned short hSyncEnd; /* Horizontal sync end in pixels */
unsigned short vTotal; /* Vertical total in lines */
unsigned short vSyncStart; /* Vertical sync start in lines */
unsigned short vSyncEnd; /* Vertical sync end in lines */
unsigned char Flags; /* Flags (Interlaced, Double Scan etc) */
unsigned long PixelClock; /* Pixel clock in units of Hz */
unsigned short RefreshRate;/* Refresh rate in units of 0.01 Hz*/
unsigned char Reserved[40];/* remainder of CRTCInfoBlock*/
}__attribute__ ((packed));
#define VESA_CRTC_DOUBLESCAN 0x01
#define VESA_CRTC_INTERLACED 0x02
#define VESA_CRTC_HSYNC_NEG 0x04
#define VESA_CRTC_VSYNC_NEG 0x08
#define VESA_MODE_CRTC_REFRESH (1 << 11)
#define VESA_MODE_USE_LINEAR (1 << 14)
#define VESA_MODE_NOT_CLEAR (1 << 15)
/* This will contain accesible 32-bit protmode pointers */
struct VesaProtModeInterface
{
void (*SetWindowCall)(void);
void (*SetDisplayStart)(void);
void (*SetPaletteData)(void);
unsigned short * iopl_ports;
}__attribute__ ((packed));
/*
All functions below return:
0 if succesful
0xffff if vm86 syscall error occurs
0x4fxx if VESA error occurs
*/
#define VBE_OK 0
#define VBE_VM86_FAIL -1
#define VBE_OUT_OF_DOS_MEM -2
#define VBE_OUT_OF_MEM -3
#define VBE_VESA_ERROR_MASK 0x4f00
#define VBE_VESA_ERRCODE_MASK 0xff
extern int vbeInit( void );
extern int vbeDetroy( void );
extern int vbeGetControllerInfo(struct VbeInfoBlock *);
extern int vbeGetModeInfo(unsigned mode,struct VesaModeInfoBlock *);
extern int vbeSetMode(unsigned mode,struct VesaCRTCInfoBlock *);
extern int vbeGetMode(unsigned *mode);
extern int vbeSaveState(void **data); /* note never copy this data */
extern int vbeRestoreState(void *data);
extern int vbeGetWindow(unsigned *win_num); /* win_A=0 or win_B=1 */
extern int vbeSetWindow(unsigned win_num,unsigned win_gran);
/*
Func 0x06:
Support of logical scan line length is not implemented.
We assume that logical scan line length == physical scan line length.
(Logical display memory == displayed area).
*/
/*
Func 0x07:
Support of disply start is not implemented.
We assume that display start always == 0, 0.
*/
/*
Func 0x08-0x09:
Support of palette currently is not implemented.
*/
extern int vbeGetProtModeInfo(struct VesaProtModeInterface *);
#endif
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