1#undef DEBUG
2
3#include <linux/kernel.h>
4#include <linux/string.h>
5#include <linux/ioport.h>
6#include <linux/etherdevice.h>
7#include <linux/of_address.h>
8#include <asm/prom.h>
9
10void of_parse_dma_window(struct device_node *dn, const __be32 *dma_window,
11			 unsigned long *busno, unsigned long *phys,
12			 unsigned long *size)
13{
14	u32 cells;
15	const __be32 *prop;
16
17	/* busno is always one cell */
18	*busno = of_read_number(dma_window, 1);
19	dma_window++;
20
21	prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
22	if (!prop)
23		prop = of_get_property(dn, "#address-cells", NULL);
24
25	cells = prop ? of_read_number(prop, 1) : of_n_addr_cells(dn);
26	*phys = of_read_number(dma_window, cells);
27
28	dma_window += cells;
29
30	prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
31	cells = prop ? of_read_number(prop, 1) : of_n_size_cells(dn);
32	*size = of_read_number(dma_window, cells);
33}
34