2 * Copyright (c) 2015 Ian Lepore <ian@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * The initial ofw_reg_to_paddr() implementation has been copied from powerpc
27 * ofw_machdep.c OF_decode_addr(). It was added by Marcel Moolenaar, who did not
28 * assert copyright with the addition but still deserves credit for the work.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
37 #include <sys/libkern.h>
38 #include <sys/reboot.h>
41 #include <machine/bus.h>
43 #include <dev/ofw/openfirm.h>
44 #include <dev/ofw/ofw_pci.h>
45 #include <dev/ofw/ofw_subr.h>
48 get_addr_props(phandle_t node, uint32_t *addrp, uint32_t *sizep, int *pcip)
54 res = OF_getencprop(node, "#address-cells", &addr, sizeof(addr));
57 res = OF_getencprop(node, "#size-cells", &size, sizeof(size));
61 if (addr == 3 && size == 2) {
62 res = OF_getprop(node, "device_type", type, sizeof(type));
64 type[sizeof(type) - 1] = '\0';
65 if (strcmp(type, "pci") == 0 ||
66 strcmp(type, "pciex")== 0)
79 ofw_reg_to_paddr(phandle_t dev, int regno, bus_addr_t *paddr,
80 bus_size_t *psize, pcell_t *ppci_hi)
82 static pcell_t cell[256];
84 uint64_t addr, raddr, baddr;
86 uint32_t c, nbridge, naddr, nsize;
87 phandle_t bridge, parent;
91 /* Sanity checking. */
94 bridge = OF_parent(dev);
99 if (paddr == NULL || psize == NULL)
102 get_addr_props(bridge, &naddr, &nsize, &pci);
103 res = OF_getencprop(dev, (pci) ? "assigned-addresses" : "reg",
107 if (res % sizeof(cell[0]))
109 res /= sizeof(cell[0]);
110 regno *= naddr + nsize;
111 if (regno + naddr + nsize > res)
113 pci_hi = pci ? cell[regno] : OFW_PADDR_NOT_PCI;
114 spc = pci_hi & OFW_PCI_PHYS_HI_SPACEMASK;
116 for (c = 0; c < naddr; c++)
117 addr = ((uint64_t)addr << 32) | cell[regno++];
119 for (c = 0; c < nsize; c++)
120 size = ((uint64_t)size << 32) | cell[regno++];
122 * Map the address range in the bridge's decoding window as given
123 * by the "ranges" property. If a node doesn't have such property
124 * or the property is empty, we assume an identity mapping. The
125 * standard says a missing property indicates no possible mapping.
126 * This code is more liberal since the intended use is to get a
127 * console running early, and a printf to warn of malformed data
128 * is probably futile before the console is fully set up.
130 parent = OF_parent(bridge);
131 while (parent != 0) {
132 get_addr_props(parent, &nbridge, NULL, &pcib);
133 res = OF_getencprop(bridge, "ranges", cell, sizeof(cell));
136 if (res % sizeof(cell[0]))
138 /* Capture pci_hi if we just transitioned onto a PCI bus. */
139 if (pcib && pci_hi == OFW_PADDR_NOT_PCI) {
141 spc = pci_hi & OFW_PCI_PHYS_HI_SPACEMASK;
143 res /= sizeof(cell[0]);
145 while (regno < res) {
146 rspc = (pci ? cell[regno] : OFW_PADDR_NOT_PCI) &
147 OFW_PCI_PHYS_HI_SPACEMASK;
149 regno += naddr + nbridge + nsize;
153 for (c = 0; c < naddr; c++)
154 raddr = ((uint64_t)raddr << 32) | cell[regno++];
156 ? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK
159 for (c = 0; c < nbridge; c++)
160 baddr = ((uint64_t)baddr << 32) | cell[regno++];
162 for (c = 0; c < nsize; c++)
163 rsize = ((uint64_t)rsize << 32) | cell[regno++];
164 if (addr < raddr || addr >= raddr + rsize)
166 addr = addr - raddr + baddr;
167 if (rspc != OFW_PADDR_NOT_PCI)
172 parent = OF_parent(bridge);
173 get_addr_props(bridge, &naddr, &nsize, &pci);
176 KASSERT(addr <= BUS_SPACE_MAXADDR,
177 ("Bus address is too large: %jx", (uintmax_t)addr));
178 KASSERT(size <= BUS_SPACE_MAXSIZE,
179 ("Bus size is too large: %jx", (uintmax_t)size));
190 * This is intended to be called early on, right after the OF system is
191 * initialized, so pmap may not be up yet.
194 ofw_parse_bootargs(void)
197 char buf[2048]; /* early stack supposedly big enough */
200 chosen = OF_finddevice("/chosen");
204 if ((err = OF_getprop(chosen, "bootargs", buf, sizeof(buf))) != -1) {
205 boothowto |= boot_parse_cmdline(buf);