static void DOSDEV_DoReq(void*req, DWORD dev)
{
REQUEST_HEADER *hdr = (REQUEST_HEADER *)req;
DOS_DEVICE_HEADER *dhdr;
CONTEXT86 ctx;
char *phdr;
dhdr = PTR_REAL_TO_LIN(SELECTOROF(dev),OFFSETOF(dev));
phdr = ((char*)DOSMEM_LOL()) + DOS_DATASEG_OFF(req);
/* copy request to request scratch area */
memcpy(phdr, req, hdr->size);
/* prepare to call device driver */
memset(&ctx, 0, sizeof(ctx));
ctx.EFlags |= V86_FLAG;
/* ES:BX points to request for strategy routine */
ctx.SegEs = HIWORD(DOS_LOLSeg);
ctx.Ebx = DOS_DATASEG_OFF(req);
/* call strategy routine */
ctx.SegCs = SELECTOROF(dev);
ctx.Eip = dhdr->strategy;
DPMI_CallRMProc(&ctx, 0, 0, 0);
/* call interrupt routine */
ctx.SegCs = SELECTOROF(dev);
ctx.Eip = dhdr->interrupt;
DPMI_CallRMProc(&ctx, 0, 0, 0);
/* completed, copy request back */
memcpy(req, phdr, hdr->size);
if (hdr->status & STAT_ERROR) {
switch (hdr->status & STAT_MASK) {
case 0x0F: /* invalid disk change */
/* this error seems to fit the bill */
SetLastError(ERROR_NOT_SAME_DEVICE);
break;
default:
SetLastError((hdr->status & STAT_MASK) + 0x13);
break;
}
}
}
void DOSDEV_InstallDOSDevices(void)
{
DOS_DATASEG *dataseg;
WORD seg;
WORD selector;
unsigned int n;
/* allocate DOS data segment or something */
dataseg = DOSVM_AllocDataUMB( sizeof(DOS_DATASEG), &seg, &selector );
DOS_LOLSeg = MAKESEGPTR( seg, 0 );
DOSMEM_LOL()->wine_rm_lol =
MAKESEGPTR( seg, FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB) );
DOSMEM_LOL()->wine_pm_lol =
MAKESEGPTR( selector, FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB) );
/* initialize the magnificent List Of Lists */
InitListOfLists(&dataseg->lol);
/* Set up first device (NUL) */
dataseg->last_dev = NULL;
DOSDEV_SetupDevice( &devs[0],
seg,
DOS_DATASEG_OFF(lol.NUL_dev),
DOS_DATASEG_OFF(thunk[0]) );
/* Set up the remaining devices */
for (n = 1; n < NR_DEVS; n++)
DOSDEV_SetupDevice( &devs[n],
seg,
DOS_DATASEG_OFF(dev[n-1]),
DOS_DATASEG_OFF(thunk[n]) );
/* CON is device 1 */
dataseg->lol.ptr_CON_dev_hdr = MAKESEGPTR(seg, DOS_DATASEG_OFF(dev[0]));
}
