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 pcell_t cell[32], pci_hi;
83 uint64_t addr, raddr, baddr;
85 uint32_t c, nbridge, naddr, nsize;
86 phandle_t bridge, parent;
90 /* Sanity checking. */
93 bridge = OF_parent(dev);
98 if (paddr == NULL || psize == NULL)
101 get_addr_props(bridge, &naddr, &nsize, &pci);
102 res = OF_getencprop(dev, (pci) ? "assigned-addresses" : "reg",
106 if (res % sizeof(cell[0]))
108 res /= sizeof(cell[0]);
109 regno *= naddr + nsize;
110 if (regno + naddr + nsize > res)
112 pci_hi = pci ? cell[regno] : OFW_PADDR_NOT_PCI;
113 spc = pci_hi & OFW_PCI_PHYS_HI_SPACEMASK;
115 for (c = 0; c < naddr; c++)
116 addr = ((uint64_t)addr << 32) | cell[regno++];
118 for (c = 0; c < nsize; c++)
119 size = ((uint64_t)size << 32) | cell[regno++];
121 * Map the address range in the bridge's decoding window as given
122 * by the "ranges" property. If a node doesn't have such property
123 * or the property is empty, we assume an identity mapping. The
124 * standard says a missing property indicates no possible mapping.
125 * This code is more liberal since the intended use is to get a
126 * console running early, and a printf to warn of malformed data
127 * is probably futile before the console is fully set up.
129 parent = OF_parent(bridge);
130 while (parent != 0) {
131 get_addr_props(parent, &nbridge, NULL, &pcib);
132 res = OF_getencprop(bridge, "ranges", cell, sizeof(cell));
135 if (res % sizeof(cell[0]))
137 /* Capture pci_hi if we just transitioned onto a PCI bus. */
138 if (pcib && pci_hi == OFW_PADDR_NOT_PCI) {
140 spc = pci_hi & OFW_PCI_PHYS_HI_SPACEMASK;
142 res /= sizeof(cell[0]);
144 while (regno < res) {
145 rspc = (pci ? cell[regno] : OFW_PADDR_NOT_PCI) &
146 OFW_PCI_PHYS_HI_SPACEMASK;
148 regno += naddr + nbridge + nsize;
152 for (c = 0; c < naddr; c++)
153 raddr = ((uint64_t)raddr << 32) | cell[regno++];
155 ? cell[regno] & OFW_PCI_PHYS_HI_SPACEMASK
158 for (c = 0; c < nbridge; c++)
159 baddr = ((uint64_t)baddr << 32) | cell[regno++];
161 for (c = 0; c < nsize; c++)
162 rsize = ((uint64_t)rsize << 32) | cell[regno++];
163 if (addr < raddr || addr >= raddr + rsize)
165 addr = addr - raddr + baddr;
166 if (rspc != OFW_PADDR_NOT_PCI)
171 parent = OF_parent(bridge);
172 get_addr_props(bridge, &naddr, &nsize, &pci);
175 KASSERT(addr <= BUS_SPACE_MAXADDR,
176 ("Bus address is too large: %jx", (uintmax_t)addr));
177 KASSERT(size <= BUS_SPACE_MAXSIZE,
178 ("Bus size is too large: %jx", (uintmax_t)size));
189 * This is intended to be called early on, right after the OF system is
190 * initialized, so pmap may not be up yet.
193 ofw_parse_bootargs(void)
196 char buf[2048]; /* early stack supposedly big enough */
199 chosen = OF_finddevice("/chosen");
203 if ((err = OF_getprop(chosen, "bootargs", buf, sizeof(buf))) != -1) {
204 boothowto |= boot_parse_cmdline(buf);