/* $XFree86: xc/lib/Xxf86dga/XF86DGA2.c,v 1.18 2001/08/17 13:27:51 dawes Exp $ */

/*

Copyright (c) 1995 Jon Tombs

Copyright (c) 1995,1996 The XFree86 Project, Inc

*/

/* THIS IS NOT AN X CONSORTIUM STANDARD */

#ifdef __EMX__ /* needed here to override certain constants in X headers */

#define INCL_DOS

#define INCL_DOSIOCTL

#include <os2.h>

#endif

#define NEED_EVENTS

#define NEED_REPLIES

#include <X11/Xlibint.h>

#include "xf86dga.h"

#include "xf86dgastr.h"

#include <X11/extensions/Xext.h>

#include "extutil.h"

#include <stdio.h>

#if defined(linux) /* Needed for framebuffer console support */

#include <sys/ioctl.h>

#include <linux/fb.h>

#endif

/* If you change this, change the Bases[] array below as well */

#define MAX_HEADS 16

char *SDL_NAME(xdga_extension_name) = XF86DGANAME;

static XExtensionInfo _xdga_info_data;

static XExtensionInfo *xdga_info = &_xdga_info_data;

Bool SDL_NAME(XDGAMapFramebuffer)(int, char *, unsigned char*, CARD32, CARD32, CARD32);

void SDL_NAME(XDGAUnmapFramebuffer)(int);

unsigned char* SDL_NAME(XDGAGetMappedMemory)(int);

#define XDGACheckExtension(dpy,i,val) \

XextCheckExtension (dpy, i, SDL_NAME(xdga_extension_name), val)

/*****************************************************************************

* *

* private utility routines *

* *

*****************************************************************************/

static int xdga_close_display(Display *dpy, XExtCodes *codes);

static Bool xdga_wire_to_event(Display *dpy, XEvent *event, xEvent *wire_ev);

static Status xdga_event_to_wire(Display *dpy, XEvent *event, xEvent *wire_ev);

static XExtensionHooks xdga_extension_hooks = {

NULL, /* create_gc */

NULL, /* copy_gc */

NULL, /* flush_gc */

NULL, /* free_gc */

NULL, /* create_font */

NULL, /* free_font */

xdga_close_display, /* close_display */

xdga_wire_to_event, /* wire_to_event */

xdga_event_to_wire, /* event_to_wire */

NULL, /* error */

NULL, /* error_string */

};

static XEXT_GENERATE_CLOSE_DISPLAY (xdga_close_display, xdga_info)

XEXT_GENERATE_FIND_DISPLAY (SDL_NAME(xdga_find_display), xdga_info,

"XFree86-DGA",

&xdga_extension_hooks,

0, NULL)

static Status

xdga_event_to_wire(

){

return True;

}

static Bool

xdga_wire_to_event(

){

dgaEvent *wire = (dgaEvent *) wire_ev;

SDL_NAME(XDGAButtonEvent) *bevent;

SDL_NAME(XDGAKeyEvent) *kevent;

SDL_NAME(XDGAMotionEvent) *mevent;

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

XDGACheckExtension (dpy, info, False);

switch((wire->u.u.type & 0x7f) - info->codes->first_event) {

case MotionNotify:

mevent = (SDL_NAME(XDGAMotionEvent)*)event;

mevent->type = wire->u.u.type & 0x7F;

mevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *)wire);

mevent->display = dpy;

mevent->screen = wire->u.event.screen;

mevent->time = wire->u.event.time;

mevent->state = wire->u.event.state;

mevent->dx = wire->u.event.dx;

mevent->dy = wire->u.event.dy;

return True;

case ButtonPress:

case ButtonRelease:

bevent = (SDL_NAME(XDGAButtonEvent)*)event;

bevent->type = wire->u.u.type & 0x7F;

bevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *)wire);

bevent->display = dpy;

bevent->screen = wire->u.event.screen;

bevent->time = wire->u.event.time;

bevent->state = wire->u.event.state;

bevent->button = wire->u.u.detail;

return True;

case KeyPress:

case KeyRelease:

kevent = (SDL_NAME(XDGAKeyEvent)*)event;

kevent->type = wire->u.u.type & 0x7F;

kevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *)wire);

kevent->display = dpy;

kevent->screen = wire->u.event.screen;

kevent->time = wire->u.event.time;

kevent->state = wire->u.event.state;

kevent->keycode = wire->u.u.detail;

return True;

}

return False;

}

Bool SDL_NAME(XDGAQueryExtension) (

Display *dpy,

int *event_basep,

int *error_basep

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

if (XextHasExtension(info)) {

*event_basep = info->codes->first_event;

*error_basep = info->codes->first_error;

return True;

} else {

return False;

}

}

Bool SDL_NAME(XDGAQueryVersion)(

Display *dpy,

int *majorVersion,

int *minorVersion

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGAQueryVersionReply rep;

xXDGAQueryVersionReq *req;

XDGACheckExtension (dpy, info, False);

LockDisplay(dpy);

GetReq(XDGAQueryVersion, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGAQueryVersion;

if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {

UnlockDisplay(dpy);

SyncHandle();

return False;

}

*majorVersion = rep.majorVersion;

*minorVersion = rep.minorVersion;

UnlockDisplay(dpy);

SyncHandle();

if (*majorVersion >= 2)

{

int i, j;

for (i = 0, j = info->codes->first_event;

i < XF86DGANumberEvents;

i++, j++)

{

XESetWireToEvent (dpy, j, xdga_wire_to_event);

XESetEventToWire (dpy, j, xdga_event_to_wire);

}

SDL_NAME(XDGASetClientVersion)(dpy);

}

return True;

}

Bool SDL_NAME(XDGASetClientVersion)(

Display *dpy

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGASetClientVersionReq *req;

XDGACheckExtension (dpy, info, False);

LockDisplay(dpy);

GetReq(XDGASetClientVersion, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGASetClientVersion;

req->major = XDGA_MAJOR_VERSION;

req->minor = XDGA_MINOR_VERSION;

UnlockDisplay(dpy);

SyncHandle();

return True;

}

Bool SDL_NAME(XDGAOpenFramebuffer)(

Display *dpy,

int screen

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGAOpenFramebufferReply rep;

xXDGAOpenFramebufferReq *req;

char *deviceName = NULL;

Bool ret;

XDGACheckExtension (dpy, info, False);

LockDisplay(dpy);

GetReq(XDGAOpenFramebuffer, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGAOpenFramebuffer;

req->screen = screen;

if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {

UnlockDisplay(dpy);

SyncHandle();

return False;

}

if(rep.length) {

deviceName = Xmalloc(rep.length << 2);

_XRead(dpy, deviceName, rep.length << 2);

}

ret = SDL_NAME(XDGAMapFramebuffer)(screen, deviceName,

(unsigned char*)(long)rep.mem1,

rep.size, rep.offset, rep.extra);

if(deviceName)

Xfree(deviceName);

UnlockDisplay(dpy);

SyncHandle();

return ret;

}

void SDL_NAME(XDGACloseFramebuffer)(

Display *dpy,

int screen

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGACloseFramebufferReq *req;

XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));

SDL_NAME(XDGAUnmapFramebuffer)(screen);

LockDisplay(dpy);

GetReq(XDGACloseFramebuffer, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGACloseFramebuffer;

req->screen = screen;

UnlockDisplay(dpy);

SyncHandle();

}

SDL_NAME(XDGAMode)* SDL_NAME(XDGAQueryModes)(

Display *dpy,

int screen,

int *num

){

XExtDisplayInfo *dinfo = SDL_NAME(xdga_find_display) (dpy);

xXDGAQueryModesReply rep;

xXDGAQueryModesReq *req;

SDL_NAME(XDGAMode) *modes = NULL;

*num = 0;

XDGACheckExtension (dpy, dinfo, NULL);

LockDisplay(dpy);

GetReq(XDGAQueryModes, req);

req->reqType = dinfo->codes->major_opcode;

req->dgaReqType = X_XDGAQueryModes;

req->screen = screen;

if (_XReply(dpy, (xReply *)&rep, 0, xFalse)) {

if(rep.length) {

xXDGAModeInfo info;

int i, size;

char *offset;

size = rep.length << 2;

size -= rep.number * sz_xXDGAModeInfo; /* find text size */

modes = (SDL_NAME(XDGAMode)*)Xmalloc((rep.number * sizeof(SDL_NAME(XDGAMode))) + size);

offset = (char*)(&modes[rep.number]); /* start of text */

if(modes) {

for(i = 0; i < rep.number; i++) {

_XRead(dpy, (char*)(&info), sz_xXDGAModeInfo);

modes[i].num = info.num;

modes[i].verticalRefresh =

(float)info.vsync_num / (float)info.vsync_den;

modes[i].flags = info.flags;

modes[i].imageWidth = info.image_width;

modes[i].imageHeight = info.image_height;

modes[i].pixmapWidth = info.pixmap_width;

modes[i].pixmapHeight = info.pixmap_height;

modes[i].bytesPerScanline = info.bytes_per_scanline;

modes[i].byteOrder = info.byte_order;

modes[i].depth = info.depth;

modes[i].bitsPerPixel = info.bpp;

modes[i].redMask = info.red_mask;

modes[i].greenMask = info.green_mask;

modes[i].blueMask = info.blue_mask;

modes[i].visualClass = info.visual_class;

modes[i].viewportWidth = info.viewport_width;

modes[i].viewportHeight = info.viewport_height;

modes[i].xViewportStep = info.viewport_xstep;

modes[i].yViewportStep = info.viewport_ystep;

modes[i].maxViewportX = info.viewport_xmax;

modes[i].maxViewportY = info.viewport_ymax;

modes[i].viewportFlags = info.viewport_flags;

modes[i].reserved1 = info.reserved1;

modes[i].reserved2 = info.reserved2;

_XRead(dpy, offset, info.name_size);

modes[i].name = offset;

offset += info.name_size;

}

*num = rep.number;

} else

_XEatData(dpy, rep.length << 2);

}

}

UnlockDisplay(dpy);

SyncHandle();

return modes;

}

SDL_NAME(XDGADevice) *

SDL_NAME(XDGASetMode)(

Display *dpy,

int screen,

int mode

){

XExtDisplayInfo *dinfo = SDL_NAME(xdga_find_display) (dpy);

xXDGASetModeReply rep;

xXDGASetModeReq *req;

SDL_NAME(XDGADevice) *dev = NULL;

Pixmap pid;

XDGACheckExtension (dpy, dinfo, NULL);

LockDisplay(dpy);

GetReq(XDGASetMode, req);

req->reqType = dinfo->codes->major_opcode;

req->dgaReqType = X_XDGASetMode;

req->screen = screen;

req->mode = mode;

req->pid = pid = XAllocID(dpy);

if (_XReply(dpy, (xReply *)&rep, 0, xFalse)) {

if(rep.length) {

xXDGAModeInfo info;

int size;

size = rep.length << 2;

size -= sz_xXDGAModeInfo; /* get text size */

dev = (SDL_NAME(XDGADevice)*)Xmalloc(sizeof(SDL_NAME(XDGADevice)) + size);

if(dev) {

_XRead(dpy, (char*)(&info), sz_xXDGAModeInfo);

dev->mode.num = info.num;

dev->mode.verticalRefresh =

(float)info.vsync_num / (float)info.vsync_den;

dev->mode.flags = info.flags;

dev->mode.imageWidth = info.image_width;

dev->mode.imageHeight = info.image_height;

dev->mode.pixmapWidth = info.pixmap_width;

dev->mode.pixmapHeight = info.pixmap_height;

dev->mode.bytesPerScanline = info.bytes_per_scanline;

dev->mode.byteOrder = info.byte_order;

dev->mode.depth = info.depth;

dev->mode.bitsPerPixel = info.bpp;

dev->mode.redMask = info.red_mask;

dev->mode.greenMask = info.green_mask;

dev->mode.blueMask = info.blue_mask;

dev->mode.visualClass = info.visual_class;

dev->mode.viewportWidth = info.viewport_width;

dev->mode.viewportHeight = info.viewport_height;

dev->mode.xViewportStep = info.viewport_xstep;

dev->mode.yViewportStep = info.viewport_ystep;

dev->mode.maxViewportX = info.viewport_xmax;

dev->mode.maxViewportY = info.viewport_ymax;

dev->mode.viewportFlags = info.viewport_flags;

dev->mode.reserved1 = info.reserved1;

dev->mode.reserved2 = info.reserved2;

dev->mode.name = (char*)(&dev[1]);

_XRead(dpy, dev->mode.name, info.name_size);

dev->pixmap = (rep.flags & XDGAPixmap) ? pid : 0;

dev->data = SDL_NAME(XDGAGetMappedMemory)(screen);

if(dev->data)

dev->data += rep.offset;

}

/* not sure what to do if the allocation fails */

}

}

UnlockDisplay(dpy);

SyncHandle();

return dev;

}

void SDL_NAME(XDGASetViewport)(

Display *dpy,

int screen,

int x,

int y,

int flags

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGASetViewportReq *req;

XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));

LockDisplay(dpy);

GetReq(XDGASetViewport, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGASetViewport;

req->screen = screen;

req->x = x;

req->y = y;

req->flags = flags;

UnlockDisplay(dpy);

SyncHandle();

}

void SDL_NAME(XDGAInstallColormap)(

Display *dpy,

int screen,

Colormap cmap

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGAInstallColormapReq *req;

XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));

LockDisplay(dpy);

GetReq(XDGAInstallColormap, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGAInstallColormap;

req->screen = screen;

req->cmap = cmap;

UnlockDisplay(dpy);

SyncHandle();

}

void SDL_NAME(XDGASelectInput)(

Display *dpy,

int screen,

long mask

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGASelectInputReq *req;

XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));

LockDisplay(dpy);

GetReq(XDGASelectInput, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGASelectInput;

req->screen = screen;

req->mask = mask;

UnlockDisplay(dpy);

SyncHandle();

}

void SDL_NAME(XDGAFillRectangle)(

Display *dpy,

int screen,

int x,

int y,

unsigned int width,

unsigned int height,

unsigned long color

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGAFillRectangleReq *req;

XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));

LockDisplay(dpy);

GetReq(XDGAFillRectangle, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGAFillRectangle;

req->screen = screen;

req->x = x;

req->y = y;

req->width = width;

req->height = height;

req->color = color;

UnlockDisplay(dpy);

SyncHandle();

}

void SDL_NAME(XDGACopyArea)(

Display *dpy,

int screen,

int srcx,

int srcy,

unsigned int width,

unsigned int height,

int dstx,

int dsty

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGACopyAreaReq *req;

XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));

LockDisplay(dpy);

GetReq(XDGACopyArea, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGACopyArea;

req->screen = screen;

req->srcx = srcx;

req->srcy = srcy;

req->width = width;

req->height = height;

req->dstx = dstx;

req->dsty = dsty;

UnlockDisplay(dpy);

SyncHandle();

}

void SDL_NAME(XDGACopyTransparentArea)(

Display *dpy,

int screen,

int srcx,

int srcy,

unsigned int width,

unsigned int height,

int dstx,

int dsty,

unsigned long key

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGACopyTransparentAreaReq *req;

XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));

LockDisplay(dpy);

GetReq(XDGACopyTransparentArea, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGACopyTransparentArea;

req->screen = screen;

req->srcx = srcx;

req->srcy = srcy;

req->width = width;

req->height = height;

req->dstx = dstx;

req->dsty = dsty;

req->key = key;

UnlockDisplay(dpy);

SyncHandle();

}

int SDL_NAME(XDGAGetViewportStatus)(

Display *dpy,

int screen

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGAGetViewportStatusReply rep;

xXDGAGetViewportStatusReq *req;

int status = 0;

XDGACheckExtension (dpy, info, 0);

LockDisplay(dpy);

GetReq(XDGAGetViewportStatus, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGAGetViewportStatus;

req->screen = screen;

if (!_XReply(dpy, (xReply *)&rep, 0, xFalse))

status = rep.status;

UnlockDisplay(dpy);

SyncHandle();

return status;

}

void SDL_NAME(XDGASync)(

Display *dpy,

int screen

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGASyncReply rep;

xXDGASyncReq *req;

XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));

LockDisplay(dpy);

GetReq(XDGASync, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGASync;

req->screen = screen;

_XReply(dpy, (xReply *)&rep, 0, xFalse);

UnlockDisplay(dpy);

SyncHandle();

}

void SDL_NAME(XDGAChangePixmapMode)(

Display *dpy,

int screen,

int *x,

int *y,

int mode

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGAChangePixmapModeReq *req;

xXDGAChangePixmapModeReply rep;

XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));

LockDisplay(dpy);

GetReq(XDGAChangePixmapMode, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGAChangePixmapMode;

req->screen = screen;

req->x = *x;

req->y = *y;

req->flags = mode;

_XReply(dpy, (xReply *)&rep, 0, xFalse);

*x = rep.x;

*y = rep.y;

UnlockDisplay(dpy);

SyncHandle();

}

Colormap SDL_NAME(XDGACreateColormap)(

Display *dpy,

int screen,

SDL_NAME(XDGADevice) *dev,

int alloc

){

XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);

xXDGACreateColormapReq *req;

Colormap cid;

XDGACheckExtension (dpy, info, -1);

LockDisplay(dpy);

GetReq(XDGACreateColormap, req);

req->reqType = info->codes->major_opcode;

req->dgaReqType = X_XDGACreateColormap;

req->screen = screen;

req->mode = dev->mode.num;

req->alloc = alloc;

cid = req->id = XAllocID(dpy);

UnlockDisplay(dpy);

SyncHandle();

return cid;

}

void SDL_NAME(XDGAKeyEventToXKeyEvent)(

SDL_NAME(XDGAKeyEvent)* dk,

XKeyEvent* xk

){

xk->type = dk->type;

xk->serial = dk->serial;

xk->send_event = False;

xk->display = dk->display;

xk->window = RootWindow(dk->display, dk->screen);

xk->root = xk->window;

xk->subwindow = None;

xk->time = dk->time;

xk->x = xk->y = xk->x_root = xk->y_root = 0;

xk->state = dk->state;

xk->keycode = dk->keycode;

xk->same_screen = True;

}

#include <X11/Xmd.h>

#include <stdlib.h>

#include <stdio.h>

#include <fcntl.h>

#if defined(ISC)

# define HAS_SVR3_MMAP

# include <sys/types.h>

# include <errno.h>

# include <sys/at_ansi.h>

# include <sys/kd.h>

# include <sys/sysmacros.h>

# include <sys/immu.h>

# include <sys/region.h>

# include <sys/mmap.h>

#else

# if !defined(Lynx)

# if !defined(__EMX__)

# include <sys/mman.h>

# endif

# else

# include <sys/types.h>

# include <errno.h>

# include <smem.h>

# endif

#endif

#include <sys/wait.h>

#include <signal.h>

#include <unistd.h>

#if defined(SVR4) && !defined(sun) && !defined(SCO325)

#define DEV_MEM "/dev/pmem"

#elif defined(SVR4) && defined(sun)

#define DEV_MEM "/dev/xsvc"

#else

#define DEV_MEM "/dev/mem"

#endif

typedef struct _DGAMapRec{

} DGAMapRec, *DGAMapPtr;

static Bool

DGAMapPhysical(int, char*, unsigned char*, CARD32, CARD32, CARD32, DGAMapPtr);

static void DGAUnmapPhysical(DGAMapPtr);

static DGAMapPtr _Maps = NULL;

unsigned char*

SDL_NAME(XDGAGetMappedMemory)(int screen)

{

DGAMapPtr pMap = _Maps;

unsigned char *pntr = NULL;

while(pMap != NULL) {

if(pMap->screen == screen) {

pntr = pMap->virtual;

break;

}

pMap = pMap->next;

}

return pntr;

}

Bool

SDL_NAME(XDGAMapFramebuffer)(

int screen,

char *name, /* optional device name */

unsigned char* base, /* physical memory */

CARD32 size, /* size */

CARD32 offset, /* optional offset */

CARD32 extra /* optional extra data */

){

DGAMapPtr pMap = _Maps;

Bool result;

/* is it already mapped ? */

while(pMap != NULL) {

if(pMap->screen == screen)

return True;

pMap = pMap->next;

}

if(extra & XDGANeedRoot) {

/* we should probably check if we have root permissions and

return False here */

}

pMap = (DGAMapPtr)Xmalloc(sizeof(DGAMapRec));

result = DGAMapPhysical(screen, name, base, size, offset, extra, pMap);

if(result) {

pMap->next = _Maps;

_Maps = pMap;

} else

Xfree(pMap);

return result;

}

void

SDL_NAME(XDGAUnmapFramebuffer)(int screen)

{

DGAMapPtr pMap = _Maps;

DGAMapPtr pPrev = NULL;

/* is it already mapped */

while(pMap != NULL) {

if(pMap->screen == screen)

break;

pPrev = pMap;

pMap = pMap->next;

}

if(!pMap)

return;

DGAUnmapPhysical(pMap);

if(!pPrev)

_Maps = pMap->next;

else

pPrev->next = pMap->next;

Xfree(pMap);

}

static Bool

DGAMapPhysical(

) {

#if defined(ISC) && defined(HAS_SVR3_MMAP)

struct kd_memloc mloc;

#elif defined(__EMX__)

APIRET rc;

ULONG action;

HFILE hfd;

#endif

base += offset;

pMap->screen = screen;

pMap->physical = base;

pMap->size = size;

#if defined(ISC) && defined(HAS_SVR3_MMAP)

if ((pMap->fd = open("/dev/mmap", O_RDWR)) < 0)

return False;

mloc.vaddr = (char *)0;

mloc.physaddr = (char *)base;

mloc.length = size;

mloc.ioflg=1;

if ((pMap->virtual = (void *)ioctl(pMap->fd, MAP, &mloc)) == (void *)-1)

return False;

#elif defined (__EMX__)

/*

* Dragon warning here! /dev/pmap$ is never closed, except on progam exit.

* Consecutive calling of this routine will make PMAP$ driver run out

* of memory handles. Some umap/close mechanism should be provided

*/

rc = DosOpen("/dev/pmap$", &hfd, &action, 0, FILE_NORMAL, FILE_OPEN,

OPEN_ACCESS_READWRITE | OPEN_SHARE_DENYNONE, (PEAOP2)NULL);

if (rc != 0)

return False;

{

struct map_ioctl {

} pmap,dmap;

ULONG plen,dlen;

#define XFREE86_PMAP 0x76

#define PMAP_MAP 0x44

pmap.a.phys = base;

pmap.size = size;

rc = DosDevIOCtl(hfd, XFREE86_PMAP, PMAP_MAP,

(PULONG)&pmap, sizeof(pmap), &plen,

(PULONG)&dmap, sizeof(dmap), &dlen);

if (rc == 0) {

pMap->virtual = dmap.a.user;

}

}

if (rc != 0)

return False;

#elif defined (Lynx)

pMap->virtual = smem_create("XF86DGA", (char*)base, size, SM_READ|SM_WRITE);

#else

#ifndef MAP_FILE

#define MAP_FILE 0

#endif

if (!name)

name = DEV_MEM;

if ((pMap->fd = open(name, O_RDWR)) < 0)

#if defined(linux)

{ /* /dev/fb0 fallback added by Sam Lantinga <hercules@lokigames.com> */

/* Try to fall back to /dev/fb on Linux - FIXME: verify the device */

struct fb_fix_screeninfo finfo;

if ((pMap->fd = open("/dev/fb0", O_RDWR)) < 0) {

return False;

}

/* The useable framebuffer console memory may not be the whole

framebuffer that X has access to. :-(

*/

if ( ioctl(pMap->fd, FBIOGET_FSCREENINFO, &finfo) < 0 ) {

close(pMap->fd);

return False;

}

/* Warning: On PPC, the size and virtual need to be offset by:

(((long)finfo.smem_start) -

(((long)finfo.smem_start)&~(PAGE_SIZE-1)))

*/

base = 0;

size = finfo.smem_len;

}

#else

return False;

#endif

pMap->virtual = mmap(NULL, size, PROT_READ | PROT_WRITE,

MAP_FILE | MAP_SHARED, pMap->fd, (off_t)base);

if (pMap->virtual == (void *)-1)

return False;

#endif

#if !defined(ISC) && !defined(HAS_SVR3_MMAP) && !defined(Lynx) \

&& !defined(__EMX__)

mprotect(pMap->virtual, size, PROT_READ | PROT_WRITE);

#endif

return True;

}

static void

DGAUnmapPhysical(DGAMapPtr pMap)

{

#if !defined(ISC) && !defined(HAS_SVR3_MMAP) && !defined(Lynx) \

&& !defined(__EMX__)

mprotect(pMap->virtual,pMap->size, PROT_READ);

#elif defined(Lynx)

/* XXX this doesn't allow enable after disable */

smem_create(NULL, pMap->virtual, pMap->size, SM_DETACH);

smem_remove("XF86DGA");

#endif

/* We need to unmap and close too !!!!!!!!!!*/

}