// 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);
}