Пример #1
0
/****************************************************************************
REMARKS:
PM_calloc override function for SNAP drivers loaded in VxD's.
****************************************************************************/
void * NTDRV_calloc(
    size_t nelem,
    size_t size)
{
    void *p = PM_mallocShared(nelem * size);
    if (p)
        memset(p,0,nelem * size);
    return p;
}
Пример #2
0
/****************************************************************************
REMARKS:
PM_realloc override function for SNAP drivers loaded in VxD's.
****************************************************************************/
void * NTDRV_realloc(
    void *ptr,
    size_t size)
{
    void *p = PM_mallocShared(size);
    if (p) {
        memcpy(p,ptr,size);
        PM_freeShared(ptr);
        }
    return p;
}
Пример #3
0
/****************************************************************************
REMARKS:
PM_malloc override function for SNAP drivers loaded in VxD's.
****************************************************************************/
void * NTDRV_malloc(
    size_t size)
{
    return PM_mallocShared(size);
}
Пример #4
0
static void InitPMCode(void)
/****************************************************************************
*
* Function:     InitPMCode  - 32 bit protected mode version
*
* Description:  Finds the address of and relocates the protected mode
*               code block from the VBE 2.0 into a local memory block. The
*               memory block is allocated with malloc() and must be freed
*               with VBE_freePMCode() after graphics processing is complete.
*
*               Note that this buffer _must_ be recopied after each mode set,
*               as the routines will change depending on the underlying
*               video mode.
*
****************************************************************************/
{
    RMREGS      regs;
    RMSREGS     sregs;
    uchar       *code;
    int         pmLen;

    if (!state->pmInfo && state->VBEVersion >= 0x200) {
	regs.x.ax = 0x4F0A;
	regs.x.bx = 0;
	PM_int86x(0x10,&regs,&regs,&sregs);
	if (regs.x.ax != VBE_SUCCESS)
	    return;
	if (VBE_shared)
	    state->pmInfo = PM_mallocShared(regs.x.cx);
	else
	    state->pmInfo = PM_malloc(regs.x.cx);
	if (state->pmInfo == NULL)
	    return;
	state->pmInfo32 = state->pmInfo;
	pmLen = regs.x.cx;

	/* Relocate the block into our local data segment */
	code = PM_mapRealPointer(sregs.es,regs.x.di);
	memcpy(state->pmInfo,code,pmLen);

	/* Now do a sanity check on the information we recieve to ensure
	 * that is is correct. Some BIOS return totally bogus information
	 * in here (Matrox is one)! Under DOS this works OK, but under OS/2
	 * we are screwed.
	 */
	if (state->pmInfo->setWindow >= pmLen ||
	    state->pmInfo->setDisplayStart >= pmLen ||
	    state->pmInfo->setPalette >= pmLen ||
	    state->pmInfo->IOPrivInfo >= pmLen) {
	    if (VBE_shared)
		PM_freeShared(state->pmInfo);
	    else
		PM_free(state->pmInfo);
	    state->pmInfo32 = state->pmInfo = NULL;
	    return;
	    }

	/* Read the IO priveledge info and determine if we need to
	 * pass a selector to MMIO registers to the bank switch code.
	 * Since we no longer support selector allocation, we no longer
	 * support this mechanism so we disable the protected mode
	 * interface in this case.
	 */
	if (state->pmInfo->IOPrivInfo && !state->MMIOSel) {
	    ushort *p = (ushort*)((uchar*)state->pmInfo + state->pmInfo->IOPrivInfo);
	    while (*p != 0xFFFF)
		p++;
	    p++;
	    if (*p != 0xFFFF)
		VBE_freePMCode();
	    }
	}
}