2 * Copyright (c) 2009-2010 The FreeBSD Foundation
5 * This software was developed by Semihalf under sponsorship from
6 * the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
35 #include <fdt_platform.h>
39 #define STR(number) #number
40 #define STRINGIFY(number) STR(number)
43 fdt_platform_load_dtb(void)
45 struct fdt_header *hdr;
50 * If the U-boot environment contains a variable giving the address of a
51 * valid blob in memory, use it. The U-boot README says the right
52 * variable for fdt data loaded into ram is fdt_addr_r, so try that
53 * first. Board vendors also use both fdtaddr and fdt_addr names.
55 s = ub_env_get("fdt_addr_r");
57 s = ub_env_get("fdtaddr");
59 s = ub_env_get("fdt_addr");
60 if (s != NULL && *s != '\0') {
61 hdr = (struct fdt_header *)strtoul(s, &p, 16);
63 if (fdt_load_dtb_addr(hdr) == 0) {
64 printf("Using DTB provided by U-Boot at "
65 "address %p.\n", hdr);
72 * If the U-boot environment contains a variable giving the name of a
73 * file, use it if we can load and validate it.
75 s = ub_env_get("fdtfile");
77 s = ub_env_get("fdt_file");
78 if (s != NULL && *s != '\0') {
79 if (fdt_load_dtb_file(s) == 0) {
80 printf("Loaded DTB from file '%s'.\n", s);
89 fdt_platform_fixups(void)
91 static struct fdt_mem_region regions[UB_MAX_MR];
92 const char *env, *str;
94 int eth_no, i, len, n;
101 /* Acquire sys_info */
102 si = ub_get_sys_info();
104 while ((env = ub_env_enum(env)) != NULL) {
105 if (strncmp(env, "eth", 3) == 0 &&
106 strncmp(env + (strlen(env) - 4), "addr", 4) == 0) {
108 * Handle Ethernet addrs: parse uboot env eth%daddr
113 * Check how many chars we will need to store
114 * maximal eth iface number.
116 len = strlen(STRINGIFY(TMP_MAX_ETH)) +
117 strlen("ethernet") + 1;
120 * Reserve mem for string "ethernet" and len
121 * chars for iface no.
123 ethstr = (char *)malloc(len * sizeof(char));
124 bzero(ethstr, len * sizeof(char));
125 strcpy(ethstr, "ethernet0");
128 /* Extract interface number */
129 i = strtol(env + 3, &end, 10);
130 if (end == (env + 3))
131 /* 'ethaddr' means interface 0 address */
139 str = ub_env_get(env);
143 * Find the lenght of the interface id by
144 * taking in to account the first 3 and
148 strncpy(ethstr + 8, env + 3, i);
152 fdt_fixup_ethernet(str, ethstr, len);
154 /* Clear ethernet..XXXX.. string */
155 bzero(ethstr + 8, len - 8);
159 } else if (strcmp(env, "consoledev") == 0) {
160 str = ub_env_get(env);
161 fdt_fixup_stdout(str);
165 /* Modify cpu(s) and bus clock frequenties in /cpus node [Hz] */
166 fdt_fixup_cpubusfreqs(si->clk_cpu, si->clk_bus);
168 /* Extract the DRAM regions into fdt_mem_region format. */
169 for (i = 0, n = 0; i < si->mr_no && n < nitems(regions); i++) {
170 if (si->mr[i].flags == MR_ATTR_DRAM) {
171 regions[n].start = si->mr[i].start;
172 regions[n].size = si->mr[i].size;
177 /* Fixup memory regions */
178 fdt_fixup_memory(regions, n);