Lines Matching +full:bus +full:- +full:addr
1 // SPDX-License-Identifier: GPL-2.0+
3 * FDT Address translation based on u-boot fdt_support.c which in turn was
9 * Copyright 2010-2011 Freescale Semiconductor, Inc.
25 /* Callbacks for bus specific translators */
29 u64 (*map)(__be32 *addr, const __be32 *range,
31 int (*translate)(__be32 *addr, u64 offset, int na);
34 /* Default translator (generic bus) */
41 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL); in fdt_bus_default_count_cells()
45 *addrc = -1; in fdt_bus_default_count_cells()
49 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); in fdt_bus_default_count_cells()
53 *sizec = -1; in fdt_bus_default_count_cells()
57 static u64 __init fdt_bus_default_map(__be32 *addr, const __be32 *range, in fdt_bus_default_map() argument
64 da = of_read_number(addr, na); in fdt_bus_default_map()
71 return da - cp; in fdt_bus_default_map()
74 static int __init fdt_bus_default_translate(__be32 *addr, u64 offset, int na) in fdt_bus_default_translate() argument
76 u64 a = of_read_number(addr, na); in fdt_bus_default_translate()
77 memset(addr, 0, na * 4); in fdt_bus_default_translate()
80 addr[na - 2] = cpu_to_fdt32(a >> 32); in fdt_bus_default_translate()
81 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); in fdt_bus_default_translate()
86 /* Array of bus specific translators */
97 const struct of_bus *bus, in fdt_translate_one() argument
98 const struct of_bus *pbus, __be32 *addr, in fdt_translate_one() argument
110 offset = of_read_number(addr, na); in fdt_translate_one()
111 memset(addr, 0, pna * 4); in fdt_translate_one()
121 for (; rlen >= rone; rlen -= rone, ranges += rone) { in fdt_translate_one()
122 offset = bus->map(addr, ranges, na, ns, pna); in fdt_translate_one()
130 memcpy(addr, ranges + na, 4 * pna); in fdt_translate_one()
133 of_dump_addr("parent translation for:", addr, pna); in fdt_translate_one()
136 /* Translate it into parent bus space */ in fdt_translate_one()
137 return pbus->translate(addr, offset, pna); in fdt_translate_one()
141 * Translate an address from the device-tree into a CPU physical address,
142 * this walks up the tree and applies the various bus mappings on the
145 * Note: We consider that crossing any level with #size-cells == 0 to mean
153 const struct of_bus *bus, *pbus; in fdt_translate_address() local
155 __be32 addr[OF_MAX_ADDR_CELLS]; in fdt_translate_address() local
169 /* Get parent & match bus type */ in fdt_translate_address()
173 bus = &of_busses[0]; in fdt_translate_address()
176 bus->count_cells(blob, parent, &na, &ns); in fdt_translate_address()
182 memcpy(addr, reg, na * 4); in fdt_translate_address()
184 pr_debug("bus (na=%d, ns=%d) on %s\n", in fdt_translate_address()
186 of_dump_addr("translating address:", addr, na); in fdt_translate_address()
190 /* Switch to parent bus */ in fdt_translate_address()
197 result = of_read_number(addr, na); in fdt_translate_address()
201 /* Get new parent bus and counts */ in fdt_translate_address()
203 pbus->count_cells(blob, parent, &pna, &pns); in fdt_translate_address()
210 pr_debug("parent bus (na=%d, ns=%d) on %s\n", in fdt_translate_address()
213 /* Apply bus translation */ in fdt_translate_address()
214 if (fdt_translate_one(blob, node_offset, bus, pbus, in fdt_translate_address()
215 addr, na, ns, pna, "ranges")) in fdt_translate_address()
221 bus = pbus; in fdt_translate_address()
223 of_dump_addr("one level translation:", addr, na); in fdt_translate_address()
230 * of_flat_dt_translate_address - translate DT addr into CPU phys addr