OSArray * IODeviceMemory::arrayFromList(
InitElement list[],
IOItemCount count )
{
OSArray * array;
IODeviceMemory * range;
IOItemCount i;
array = OSArray::withCapacity( count );
if( 0 == array )
return( 0);
for( i = 0; i < count; i++) {
range = IODeviceMemory::withRange( list[i].start, list[i].length );
if( range) {
range->setTag( list[i].tag );
array->setObject( range);
range->release();
} else {
array->release();
array = 0;
break;
}
}
return( array );
}
/*! @function getApertureRange
@abstract Return reference to IODeviceMemory object representing
memory range of framebuffer.
@discussion IOFramebuffer subclasses must implement this method to
describe the memory used by the framebuffer in the current
mode. The OS will map this memory range into user space
for client access - the range should only include vram
memory not hardware registers.
how is the connection specified?
@param aperture The system will only access the aperture kIOFBSystemAperture.
@result an IODeviceMemory instance. A reference will be consumed
by the caller for each call of this method - the implementatation
should create a new instance of IODeviceMemory for each
call, or return one instance with a retain for each call.
*/
IODeviceMemory *
com_doequalsglory_driver_IOProxyFramebuffer::getApertureRange(IOPixelAperture aper) {
#if defined(DEBUG_CALLS)
IOLog(kDebugStr "getApertureRange(%p)\n", aper);
#endif
if (fCurrentDisplayMode == 0) {
return NULL;
}
if (aper != kIOFBSystemAperture) {
return NULL;
}
IODeviceMemory *deviceMemory = getVRAMRange();
if (deviceMemory == NULL) {
return NULL;
}
IODeviceMemory *apertureRange = IODeviceMemory::withSubRange(deviceMemory, 0, getApertureSize(fCurrentDisplayMode, fCurrentDepth));
deviceMemory->release(); // since getNVRAMRange() does a retain()
return apertureRange;
}
