1 /*-
2 * Copyright (c) 2009-2010 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Semihalf under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
16 *
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
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <stand.h>
35 #include <fdt_platform.h>
36
37 #include "glue.h"
38
39 #define STR(number) #number
40 #define STRINGIFY(number) STR(number)
41
42 int
fdt_platform_load_dtb(void)43 fdt_platform_load_dtb(void)
44 {
45 struct fdt_header *hdr;
46 const char *s;
47 char *p;
48
49 /*
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.
54 */
55 s = ub_env_get("fdt_addr_r");
56 if (s == NULL)
57 s = ub_env_get("fdtaddr");
58 if (s == NULL)
59 s = ub_env_get("fdt_addr");
60 if (s != NULL && *s != '\0') {
61 hdr = (struct fdt_header *)strtoul(s, &p, 16);
62 if (*p == '\0') {
63 if (fdt_load_dtb_addr(hdr) == 0) {
64 printf("Using DTB provided by U-Boot at "
65 "address %p.\n", hdr);
66 return (0);
67 }
68 }
69 }
70
71 /*
72 * Try to get FDT filename first from loader env and then from u-boot env
73 */
74 s = getenv("fdt_file");
75 if (s == NULL)
76 s = ub_env_get("fdtfile");
77 if (s == NULL)
78 s = ub_env_get("fdt_file");
79 if (s != NULL && *s != '\0') {
80 if (fdt_load_dtb_file(s) == 0) {
81 printf("Loaded DTB from file '%s'.\n", s);
82 return (0);
83 }
84 }
85
86 return (1);
87 }
88
89 void
fdt_platform_fixups(void)90 fdt_platform_fixups(void)
91 {
92 static struct fdt_mem_region regions[UB_MAX_MR];
93 const char *env, *str;
94 char *end, *ethstr;
95 int eth_no, i, len, n;
96 struct sys_info *si;
97
98 env = NULL;
99 eth_no = 0;
100 ethstr = NULL;
101
102 /* Acquire sys_info */
103 si = ub_get_sys_info();
104
105 while ((env = ub_env_enum(env)) != NULL) {
106 if (strncmp(env, "eth", 3) == 0 &&
107 strncmp(env + (strlen(env) - 4), "addr", 4) == 0) {
108 /*
109 * Handle Ethernet addrs: parse uboot env eth%daddr
110 */
111
112 if (!eth_no) {
113 /*
114 * Check how many chars we will need to store
115 * maximal eth iface number.
116 */
117 len = strlen(STRINGIFY(TMP_MAX_ETH)) +
118 strlen("ethernet") + 1;
119
120 /*
121 * Reserve mem for string "ethernet" and len
122 * chars for iface no.
123 */
124 ethstr = (char *)malloc(len * sizeof(char));
125 bzero(ethstr, len * sizeof(char));
126 strcpy(ethstr, "ethernet0");
127 }
128
129 /* Extract interface number */
130 i = strtol(env + 3, &end, 10);
131 if (end == (env + 3))
132 /* 'ethaddr' means interface 0 address */
133 n = 0;
134 else
135 n = i;
136
137 if (n > TMP_MAX_ETH)
138 continue;
139
140 str = ub_env_get(env);
141
142 if (n != 0) {
143 /*
144 * Find the length of the interface id by
145 * taking in to account the first 3 and
146 * last 4 characters.
147 */
148 i = strlen(env) - 7;
149 strncpy(ethstr + 8, env + 3, i);
150 }
151
152 /* Modify blob */
153 fdt_fixup_ethernet(str, ethstr, len);
154
155 /* Clear ethernet..XXXX.. string */
156 bzero(ethstr + 8, len - 8);
157
158 if (n + 1 > eth_no)
159 eth_no = n + 1;
160 } else if (strcmp(env, "consoledev") == 0) {
161 str = ub_env_get(env);
162 fdt_fixup_stdout(str);
163 }
164 }
165
166 /* Modify cpu(s) and bus clock frequenties in /cpus node [Hz] */
167 fdt_fixup_cpubusfreqs(si->clk_cpu, si->clk_bus);
168
169 /* Extract the DRAM regions into fdt_mem_region format. */
170 for (i = 0, n = 0; i < si->mr_no && n < nitems(regions); i++) {
171 if (si->mr[i].flags == MR_ATTR_DRAM) {
172 regions[n].start = si->mr[i].start;
173 regions[n].size = si->mr[i].size;
174 n++;
175 }
176 }
177
178 /* Fixup memory regions */
179 fdt_fixup_memory(regions, n);
180 }
181