drivers/of/fdt_address.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * FDT Address translation based on u-boot fdt_support.c which in turn was
4  * based on the kernel unflattened DT address translation code.
9  * Copyright 2010-2011 Freescale Semiconductor, Inc.
20 /* Max address size we deal with */
30 	while(na--)  in of_dump_addr()
54 		prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);  in fdt_bus_default_count_cells()
62 		prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);  in fdt_bus_default_count_cells()
84 	return da - cp;  in fdt_bus_default_map()
93 		addr[na - 2] = cpu_to_fdt32(a >> 32);  in fdt_bus_default_translate()
94 	addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);  in fdt_bus_default_translate()
125 		pr_debug("empty ranges, 1:1 translation\n");  in fdt_translate_one()
134 	for (; rlen >= rone; rlen -= rone, ranges += rone) {  in fdt_translate_one()
135 		offset = bus->map(addr, ranges, na, ns, pna);  in fdt_translate_one()
146 	of_dump_addr("parent translation for:", addr, pna);  in fdt_translate_one()
150 	return pbus->translate(addr, offset, pna);  in fdt_translate_one()
154  * Translate an address from the device-tree into a CPU physical address,
158  * Note: We consider that crossing any level with #size-cells == 0 to mean
159  * that translation is impossible (that is we are not dealing with a value
160  * that can be mapped to a cpu physical address). This is not really specified
172 	pr_debug("** translation for device %s **\n",  in fdt_translate_address()
177 		pr_err("warning: device tree node '%s' has no address.\n",  in fdt_translate_address()
188 	/* Cound address cells & copy address locally */  in fdt_translate_address()
189 	bus->count_cells(blob, parent, &na, &ns);  in fdt_translate_address()
199 	of_dump_addr("translating address:", addr, na);  in fdt_translate_address()
216 		pbus->count_cells(blob, parent, &pna, &pns);  in fdt_translate_address()
226 		/* Apply bus translation */  in fdt_translate_address()
236 		of_dump_addr("one level translation:", addr, na);  in fdt_translate_address()
243  * of_flat_dt_translate_address - translate DT addr into CPU phys addr