[Mplayer-cvslog] CVS: main/linux vbelib.c,NONE,1.1 vbelib.h,NONE,1.1

Nick Kurshev nick at mplayer.dev.hu
Wed Oct 17 20:20:46 CEST 2001


Update of /cvsroot/mplayer/main/linux
In directory mplayer:/var/tmp.root/cvs-serv1126/main/linux

Added Files:
	vbelib.c vbelib.h 
Log Message:
vbelib import

--- NEW FILE ---
/*
   This file contains implementation of VESA library which is based on
   LRMI (Linux real-mode interface).
   So it's not an emulator - it calls real int 10h handler under Linux.
   Note: VESA is available only on x86 systems.
   You can redistribute this file under terms and conditions
   GNU General Public licence v2.
   Written by Nick Kurshev <nickols_k at mail.ru>
*/
#include "vbelib.h"
#include "lrmi.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sys/io.h>

static struct VesaProtModeInterface vbe_pm_info;

int vbeInit( void )
{
   if(!LRMI_init()) return VBE_VM86_FAIL;
   /*
    Allow read/write to ALL io ports
   */
   ioperm(0, 1024, 1);
   iopl(3);
   memset(&vbe_pm_info,0,sizeof(struct VesaProtModeInterface));
   vbeGetProtModeInfo(&vbe_pm_info);
   return VBE_OK;
}

int vbeDestroy( void ) { return VBE_OK; }

int vbeGetControllerInfo(struct VbeInfoBlock *data)
{
  struct LRMI_regs r;
  void *rm_space;
  int retval;
  if(!(rm_space = LRMI_alloc_real(sizeof(struct VbeInfoBlock)))) return VBE_OUT_OF_DOS_MEM;
  memcpy(rm_space,data,sizeof(struct VbeInfoBlock));
  memset(&r,0,sizeof(struct LRMI_regs));
  r.eax = 0x4f00;
  r.es  = VirtToPhysSeg(rm_space);
  r.edi = VirtToPhysOff(rm_space);
  if(!LRMI_int(0x10,&r))
  {
     LRMI_free_real(rm_space);
     return VBE_VM86_FAIL;
  }
  retval = r.eax & 0xffff;
  if(retval == 0x4f)
  {
    FarPtr fpdata;
    retval = VBE_OK;
    memcpy(data,rm_space,sizeof(struct VbeInfoBlock));
    fpdata.seg = (unsigned long)(data->OemStringPtr) >> 16;
    fpdata.off = (unsigned long)(data->OemStringPtr) & 0xffff;
    data->OemStringPtr = PhysToVirt(fpdata);
    fpdata.seg = (unsigned long)(data->VideoModePtr) >> 16;
    fpdata.off = (unsigned long)(data->VideoModePtr) & 0xffff;
    data->VideoModePtr = PhysToVirt(fpdata);
    fpdata.seg = (unsigned long)(data->OemVendorNamePtr) >> 16;
    fpdata.off = (unsigned long)(data->OemVendorNamePtr) & 0xffff;
    data->OemVendorNamePtr = PhysToVirt(fpdata);
    fpdata.seg = (unsigned long)(data->OemProductNamePtr) >> 16;
    fpdata.off = (unsigned long)(data->OemProductNamePtr) & 0xffff;
    data->OemProductNamePtr = PhysToVirt(fpdata);
    fpdata.seg = (unsigned long)(data->OemProductRevPtr) >> 16;
    fpdata.off = (unsigned long)(data->OemProductRevPtr) & 0xffff;
    data->OemProductRevPtr = PhysToVirt(fpdata);
  }
  return retval;
}

int vbeGetModeInfo(unsigned mode,struct VesaModeInfoBlock *data)
{
  struct LRMI_regs r;
  void *rm_space;
  int retval;
  if(!(rm_space = LRMI_alloc_real(sizeof(struct VesaModeInfoBlock)))) return VBE_OUT_OF_DOS_MEM;
  memset(&r,0,sizeof(struct LRMI_regs));
  r.eax = 0x4f01;
  r.ecx = mode;
  r.es  = VirtToPhysSeg(rm_space);
  r.edi = VirtToPhysOff(rm_space);
  if(!LRMI_int(0x10,&r))
  {
     LRMI_free_real(rm_space);
     return VBE_VM86_FAIL;
  }
  retval = r.eax & 0xffff;
  if(retval == 0x4f)
  {
    retval = VBE_OK;
    memcpy(data,rm_space,sizeof(struct VesaModeInfoBlock));
  }
  return retval;
}

int vbeSetMode(unsigned mode,struct VesaCRTCInfoBlock *data)
{
  struct LRMI_regs r;
  void *rm_space = NULL;
  int retval;
  memset(&r,0,sizeof(struct LRMI_regs));
  if(data)
  {
    if(!(rm_space = LRMI_alloc_real(sizeof(struct VesaCRTCInfoBlock)))) return VBE_OUT_OF_DOS_MEM;
    r.es  = VirtToPhysSeg(rm_space);
    r.edi = VirtToPhysOff(rm_space);
    memcpy(rm_space,data,sizeof(struct VesaCRTCInfoBlock));
  }
  r.eax = 0x4f02;
  r.ebx = mode;
  retval = LRMI_int(0x10,&r);
  if(rm_space) LRMI_free_real(rm_space);
  if(!retval) return VBE_VM86_FAIL;
  retval = r.eax & 0xffff;
  if(retval == 0x4f) retval = VBE_OK;
  return retval;
}

int vbeGetMode(unsigned *mode)
{
  struct LRMI_regs r;
  int retval;
  memset(&r,0,sizeof(struct LRMI_regs));
  r.eax = 0x4f03;
  if(!LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
  retval = r.eax & 0xffff;
  if(retval == 0x4f)
  {
    *mode = r.ebx;
    retval = VBE_OK;
  }
  return retval;
}

int vbeSaveState(void **data)
{
  struct LRMI_regs r;
  int retval;
  void *rm_space;
  memset(&r,0,sizeof(struct LRMI_regs));
  r.eax = 0x4f04;
  r.edx = 0x00;
  r.ecx = 0x0f;
  if(!LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
  retval = r.eax & 0xffff;
  if(retval != 0x4f) return retval;
  if(!(rm_space = LRMI_alloc_real((r.ebx & 0xffff)*64))) return VBE_OUT_OF_DOS_MEM;
  r.eax = 0x4f04;
  r.edx = 0x01;
  r.ecx = 0x0f;
  r.es  = VirtToPhysSeg(rm_space);
  r.edi = VirtToPhysOff(rm_space);
  if(!LRMI_int(0x10,&r))
  {
    LRMI_free_real(rm_space);
    return VBE_VM86_FAIL;
  }
  retval = r.eax & 0xffff;
  if(retval != 0x4f)
  {
    LRMI_free_real(rm_space);
    return retval;
  }
  *data = rm_space;
  return VBE_OK;
}

int vbeRestoreState(void *data)
{
  struct LRMI_regs r;
  int retval;
  void *rm_space;
  memset(&r,0,sizeof(struct LRMI_regs));
  r.eax = 0x4f04;
  r.edx = 0x02;
  r.ecx = 0x0f;
  r.es  = VirtToPhysSeg(data);
  r.edi = VirtToPhysOff(data);
  retval = LRMI_int(0x10,&r);
  LRMI_free_real(data);
  if(!retval) return VBE_VM86_FAIL;
  retval = r.eax & 0xffff;
  if(retval == 0x4f) retval = VBE_OK;
  return retval;
}

int vbeGetWindow(unsigned *win_num)
{
  struct LRMI_regs r;
  int retval;
  memset(&r,0,sizeof(struct LRMI_regs));
  r.eax = 0x4f05;
  r.ebx = (*win_num & 0x0f) | 0x0100;
  if(!LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
  retval = r.eax & 0xffff;
  if(retval == 0x4f)
  {
    *win_num = r.edx & 0xffff;
    retval = VBE_OK;
  }
  return retval;
}

int vbeSetWindow(unsigned win_num,unsigned win_gran)
{
  int retval;
#if 0
  if(vbe_pm_info.SetWindowCall)
  {
     /* 32-bit function call is much better of int 10h */
     __asm __volatile(
	"pushl	%%ebx\n"
	"movl	%1, %%ebx\n"
	::"a"(0x4f05),"S"(win_num & 0x0f),"d"(win_gran):"memory");
    (*vbe_pm_info.SetWindowCall)();
    __asm __volatile("popl	%%ebx":"=a"(retval)::"memory");
  }
  else
#endif
  {
    struct LRMI_regs r;
    memset(&r,0,sizeof(struct LRMI_regs));
    r.eax = 0x4f05;
    r.ebx = win_num & 0x0f;
    r.edx = win_gran;
    if(!LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
    retval = r.eax & 0xffff;
  }
  if(retval == 0x4f) retval = VBE_OK;
  return retval;
}

struct realVesaProtModeInterface
{
  unsigned short SetWindowCall;
  unsigned short SetDisplayStart;
  unsigned short SetPaletteData;
  unsigned short iopl_ports;
}__attribute__((packed));

int vbeGetProtModeInfo(struct VesaProtModeInterface *pm_info)
{
  struct LRMI_regs r;
  int retval;
  struct realVesaProtModeInterface *rm_info;
  memset(&r,0,sizeof(struct LRMI_regs));
  r.eax = 0x4f0a;
  r.ebx = 0;
  if(!LRMI_int(0x10,&r)) return VBE_VM86_FAIL;
  retval = r.eax & 0xffff;
  if(retval == 0x4f)
  {
    rm_info = PhysToVirtSO(r.es,r.edi&0xffff);
    pm_info->SetWindowCall   = PhysToVirtSO(r.es,rm_info->SetWindowCall);
    pm_info->SetDisplayStart = PhysToVirtSO(r.es,rm_info->SetDisplayStart);
    pm_info->SetPaletteData  = PhysToVirtSO(r.es,rm_info->SetPaletteData);
    pm_info->iopl_ports      = PhysToVirtSO(r.es,rm_info->iopl_ports);
    retval = VBE_OK;
  }
  return retval;
}

--- NEW FILE ---
/*
   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 at 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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