blob: 0ca4718c883062cfaf510751da18914191019114 [file] [log] [blame]
Wolfgang Denk7b64fef2006-10-24 14:21:16 +02001/*
2 * Copyright (C) 2004-2006 Atmel Corporation
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22#include <common.h>
23#include <command.h>
24#include <image.h>
25#include <zlib.h>
26#include <asm/byteorder.h>
Olav Morkena38de082009-01-23 12:56:28 +010027#include <asm/arch/addrspace.h>
Wolfgang Denk7b64fef2006-10-24 14:21:16 +020028#include <asm/io.h>
29#include <asm/setup.h>
Haavard Skinnemoendf548d32006-11-19 18:06:53 +010030#include <asm/arch/clk.h>
Wolfgang Denk7b64fef2006-10-24 14:21:16 +020031
32DECLARE_GLOBAL_DATA_PTR;
33
Wolfgang Denk7b64fef2006-10-24 14:21:16 +020034/* CPU-specific hook to allow flushing of caches, etc. */
35extern void prepare_to_boot(void);
36
Wolfgang Denk7b64fef2006-10-24 14:21:16 +020037static struct tag *setup_start_tag(struct tag *params)
38{
39 params->hdr.tag = ATAG_CORE;
40 params->hdr.size = tag_size(tag_core);
41
42 params->u.core.flags = 0;
43 params->u.core.pagesize = 4096;
44 params->u.core.rootdev = 0;
45
46 return tag_next(params);
47}
48
49static struct tag *setup_memory_tags(struct tag *params)
50{
51 bd_t *bd = gd->bd;
52 int i;
53
54 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
55 params->hdr.tag = ATAG_MEM;
56 params->hdr.size = tag_size(tag_mem_range);
57
58 params->u.mem_range.addr = bd->bi_dram[i].start;
59 params->u.mem_range.size = bd->bi_dram[i].size;
60
61 params = tag_next(params);
62 }
63
64 return params;
65}
66
67static struct tag *setup_commandline_tag(struct tag *params, char *cmdline)
68{
69 if (!cmdline)
70 return params;
71
72 /* eat leading white space */
73 while (*cmdline == ' ') cmdline++;
74
75 /*
76 * Don't include tags for empty command lines; let the kernel
77 * use its default command line.
78 */
79 if (*cmdline == '\0')
80 return params;
81
82 params->hdr.tag = ATAG_CMDLINE;
83 params->hdr.size =
84 (sizeof (struct tag_header) + strlen(cmdline) + 1 + 3) >> 2;
85 strcpy(params->u.cmdline.cmdline, cmdline);
86
87 return tag_next(params);
88}
89
90static struct tag *setup_ramdisk_tag(struct tag *params,
91 unsigned long rd_start,
92 unsigned long rd_end)
93{
94 if (rd_start == rd_end)
95 return params;
96
97 params->hdr.tag = ATAG_RDIMG;
98 params->hdr.size = tag_size(tag_mem_range);
99
100 params->u.mem_range.addr = rd_start;
101 params->u.mem_range.size = rd_end - rd_start;
102
103 return tag_next(params);
104}
105
106static struct tag *setup_clock_tags(struct tag *params)
107{
108 params->hdr.tag = ATAG_CLOCK;
109 params->hdr.size = tag_size(tag_clock);
110 params->u.clock.clock_id = ACLOCK_BOOTCPU;
111 params->u.clock.clock_flags = 0;
112 params->u.clock.clock_hz = gd->cpu_hz;
113
114#ifdef CONFIG_AT32AP7000
115 /*
116 * New kernels don't need this, but we should be backwards
117 * compatible for a while...
118 */
119 params = tag_next(params);
120
121 params->hdr.tag = ATAG_CLOCK;
122 params->hdr.size = tag_size(tag_clock);
123 params->u.clock.clock_id = ACLOCK_HSB;
124 params->u.clock.clock_flags = 0;
Haavard Skinnemoendf548d32006-11-19 18:06:53 +0100125 params->u.clock.clock_hz = get_hsb_clk_rate();
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200126#endif
127
128 return tag_next(params);
129}
130
131static struct tag *setup_ethernet_tag(struct tag *params,
132 char *addr, int index)
133{
134 char *s, *e;
135 int i;
136
137 params->hdr.tag = ATAG_ETHERNET;
138 params->hdr.size = tag_size(tag_ethernet);
139
140 params->u.ethernet.mac_index = index;
141 params->u.ethernet.mii_phy_addr = gd->bd->bi_phy_id[index];
142
143 s = addr;
144 for (i = 0; i < 6; i++) {
145 params->u.ethernet.hw_address[i] = simple_strtoul(s, &e, 16);
146 s = e + 1;
147 }
148
149 return tag_next(params);
150}
151
152static struct tag *setup_ethernet_tags(struct tag *params)
153{
154 char name[16] = "ethaddr";
155 char *addr;
156 int i = 0;
157
158 do {
159 addr = getenv(name);
160 if (addr)
161 params = setup_ethernet_tag(params, addr, i);
162 sprintf(name, "eth%daddr", ++i);
163 } while (i < 4);
164
165 return params;
166}
167
168static void setup_end_tag(struct tag *params)
169{
170 params->hdr.tag = ATAG_NONE;
171 params->hdr.size = 0;
172}
173
Kumar Gala40d7e992008-08-15 08:24:45 -0500174int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200175{
Marian Balakowiczd5934ad2008-02-04 08:28:09 +0100176 void (*theKernel)(int magic, void *tagtable);
177 struct tag *params, *params_start;
178 char *commandline = getenv("bootargs");
Marian Balakowiczf13e7b22008-01-08 18:12:17 +0100179
Kumar Gala49c3a862008-10-21 17:25:45 -0500180 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
181 return 1;
182
Kumar Galac160a952008-08-15 08:24:36 -0500183 theKernel = (void *)images->ep;
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200184
Heiko Schocherfad63402007-07-13 09:54:17 +0200185 show_boot_progress (15);
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200186
187 params = params_start = (struct tag *)gd->bd->bi_boot_params;
188 params = setup_start_tag(params);
189 params = setup_memory_tags(params);
Kumar Galac4f94192008-08-15 08:24:37 -0500190 if (images->rd_start) {
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200191 params = setup_ramdisk_tag(params,
Kumar Galac4f94192008-08-15 08:24:37 -0500192 PHYSADDR(images->rd_start),
193 PHYSADDR(images->rd_end));
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200194 }
195 params = setup_commandline_tag(params, commandline);
196 params = setup_clock_tags(params);
197 params = setup_ethernet_tags(params);
198 setup_end_tag(params);
199
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200200 printf("\nStarting kernel at %p (params at %p)...\n\n",
201 theKernel, params_start);
202
203 prepare_to_boot();
204
205 theKernel(ATAG_MAGIC, params_start);
Marian Balakowiczcd7c5962008-03-12 10:33:00 +0100206 /* does not return */
Jean-Christophe PLAGNIOL-VILLARDa3a08c02008-09-10 22:48:09 +0200207
Kumar Gala40d7e992008-08-15 08:24:45 -0500208 return 1;
Wolfgang Denk7b64fef2006-10-24 14:21:16 +0200209}