// SPDX-License-Identifier: GPL-2.0
|
#undef DEBUG
|
|
#include <linux/kernel.h>
|
#include <linux/string.h>
|
#include <linux/ioport.h>
|
#include <linux/etherdevice.h>
|
#include <linux/of_address.h>
|
#include <asm/prom.h>
|
|
void of_parse_dma_window(struct device_node *dn, const __be32 *dma_window,
|
unsigned long *busno, unsigned long *phys,
|
unsigned long *size)
|
{
|
u32 cells;
|
const __be32 *prop;
|
|
/* busno is always one cell */
|
*busno = of_read_number(dma_window, 1);
|
dma_window++;
|
|
prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
|
if (!prop)
|
prop = of_get_property(dn, "#address-cells", NULL);
|
|
cells = prop ? of_read_number(prop, 1) : of_n_addr_cells(dn);
|
*phys = of_read_number(dma_window, cells);
|
|
dma_window += cells;
|
|
prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
|
cells = prop ? of_read_number(prop, 1) : of_n_size_cells(dn);
|
*size = of_read_number(dma_window, cells);
|
}
|
