C++ (Cpp) _bus_dmamem_alloc_rangeの例

コード例 #1

ファイル: bus_dma.c プロジェクト: ryo/netbsd-src

/*
 * Common function for DMA-safe memory allocation.  May be called
 * by bus-specific DMA memory allocation functions.
 */
int
_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment, bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags)
{

	return _bus_dmamem_alloc_range(t, size, alignment, boundary,
	    segs, nsegs, rsegs, flags, pmap_limits.avail_start,
	    trunc_page(pmap_limits.avail_end));
}

コード例 #2

ファイル: bus_dma.c プロジェクト: ajinkya93/OpenBSD

/*
 * Common function for DMA-safe memory allocation.  May be called
 * by bus-specific DMA memory allocation functions.
 */
int
_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment,
    bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs,
    int flags)
{

	return (_bus_dmamem_alloc_range(t, size, alignment, boundary,
	    segs, nsegs, rsegs, flags, (bus_addr_t)0, (bus_addr_t)-1));
}

コード例 #3

ファイル: bus_dma.c プロジェクト: avsm/openbsd-xen-sys

int
_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment,
    bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs,
    int flags)
{
	struct arm32_dma_range *dr;
	int error, i;

#ifdef DEBUG_DMA
	printf("dmamem_alloc t=%p size=%lx align=%lx boundary=%lx "
	    "segs=%p nsegs=%x rsegs=%p flags=%x\n", t, size, alignment,
	    boundary, segs, nsegs, rsegs, flags);
#endif

	if ((dr = t->_ranges) != NULL) {
		error = ENOMEM;
		for (i = 0; i < t->_nranges; i++, dr++) {
			if (dr->dr_len == 0)
				continue;
			error = _bus_dmamem_alloc_range(t, size, alignment,
			    boundary, segs, nsegs, rsegs, flags,
			    trunc_page(dr->dr_sysbase),
			    trunc_page(dr->dr_sysbase + dr->dr_len));
			if (error == 0)
				break;
		}
	} else {
		error = _bus_dmamem_alloc_range(t, size, alignment, boundary,
		    segs, nsegs, rsegs, flags, trunc_page(physical_start),
		    trunc_page(physical_end));
	}

#ifdef DEBUG_DMA
	printf("dmamem_alloc: =%d\n", error);
#endif

	return(error);
}

コード例 #4

ファイル: isadma_bounce.c プロジェクト: MarginC/kame

/*
 * Allocate memory safe for ISA DMA.
 */
int
isadma_bounce_dmamem_alloc(bus_dma_tag_t t, bus_size_t size,
    bus_size_t alignment, bus_size_t boundary, bus_dma_segment_t *segs,
    int nsegs, int *rsegs, int flags)
{
	paddr_t high;

	if (avail_end > ISA_DMA_BOUNCE_THRESHOLD)
		high = trunc_page(ISA_DMA_BOUNCE_THRESHOLD);
	else
		high = trunc_page(avail_end);

	return (_bus_dmamem_alloc_range(t, size, alignment, boundary,
	    segs, nsegs, rsegs, flags, 0, high));
}

コード例 #5

ファイル: bus_dma.c プロジェクト: alenichev/openbsd-kernel

/*
 * Common function for DMA-safe memory allocation.  May be called
 * by bus-specific DMA memory allocation functions.
 */
int
_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment,
    bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs,
    int flags)
{

	/*
	 * XXX in the presence of decent (working) iommus and bouncebuffers
	 * we can then fallback this allocation to a range of { 0, -1 }.
	 * However for now  we err on the side of caution and allocate dma
	 * memory under the 4gig boundary.
	 */
	return (_bus_dmamem_alloc_range(t, size, alignment, boundary,
	    segs, nsegs, rsegs, flags, (paddr_t)0, (paddr_t)0xffffffff));
}

コード例 #6

/*
 * Common function for DMA-safe memory allocation.  May be called
 * by bus-specific DMA memory allocation functions.
 */
int
_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment,
    bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs,
    int flags)
{
	bus_addr_t high;

	if (t->_bounce_alloc_hi != 0 && _BUS_AVAIL_END > t->_bounce_alloc_hi)
		high = trunc_page(t->_bounce_alloc_hi);
	else
		high = trunc_page(_BUS_AVAIL_END);

	return _bus_dmamem_alloc_range(t, size, alignment, boundary,
	    segs, nsegs, rsegs, flags, t->_bounce_alloc_lo, high);
}

コード例 #7

ファイル: isadma_machdep.c プロジェクト: MarginC/kame

/*
 * Allocate memory safe for ISA DMA.
 */
int
_isa_bus_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment,
	bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs,
	int flags)
{
	paddr_t high, avail_end = 0;
	int bank;

	for (bank = 0; bank < vm_nphysseg; bank++) {
		if (avail_end < vm_physmem[bank].avail_end << PGSHIFT)
			avail_end = vm_physmem[bank].avail_end << PGSHIFT;
	}

	if (avail_end > ISA_DMA_BOUNCE_THRESHOLD)
		high = trunc_page(ISA_DMA_BOUNCE_THRESHOLD);
	else
		high = trunc_page(avail_end);
	return (_bus_dmamem_alloc_range(t, size, alignment, boundary,
	    segs, nsegs, rsegs, flags, 0, high));
}