2 * (C) Copyright 2007 Michal Simek
3 * (C) Copyright 2004 Atmark Techno, Inc.
5 * Michal SIMEK <monstr@monstr.eu>
6 * Yasushi SHOJI <yashi@atmark-techno.com>
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/byteorder.h>
33 DECLARE_GLOBAL_DATA_PTR;
35 #ifdef CONFIG_SHOW_BOOT_PROGRESS
36 # include <status_led.h>
37 # define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
39 # define SHOW_BOOT_PROGRESS(arg)
42 extern image_header_t header; /* from cmd_bootm.c */
44 extern int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]);
46 void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
47 ulong addr, ulong * len_ptr, int verify)
49 ulong len = 0, checksum;
50 ulong initrd_start, initrd_end;
52 /* First parameter is mapped to $r5 for kernel boot args */
53 void (*theKernel) (char *);
54 image_header_t *hdr = &header;
55 char *commandline = getenv ("bootargs");
58 theKernel = (void (*)(char *))ntohl (hdr->ih_ep);
60 /* Check if there is an initrd image */
62 SHOW_BOOT_PROGRESS (9);
64 addr = simple_strtoul (argv[2], NULL, 16);
66 printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
68 /* Copy header so we can blank CRC field for re-calculation */
69 memcpy (&header, (char *)addr, sizeof (image_header_t));
71 if (ntohl (hdr->ih_magic) != IH_MAGIC) {
72 printf ("Bad Magic Number\n");
73 SHOW_BOOT_PROGRESS (-10);
74 do_reset (cmdtp, flag, argc, argv);
77 data = (ulong) & header;
78 len = sizeof (image_header_t);
80 checksum = ntohl (hdr->ih_hcrc);
83 if (crc32 (0, (char *)data, len) != checksum) {
84 printf ("Bad Header Checksum\n");
85 SHOW_BOOT_PROGRESS (-11);
86 do_reset (cmdtp, flag, argc, argv);
89 SHOW_BOOT_PROGRESS (10);
91 print_image_hdr (hdr);
93 data = addr + sizeof (image_header_t);
94 len = ntohl (hdr->ih_size);
99 printf (" Verifying Checksum ... ");
100 csum = crc32 (0, (char *)data, len);
101 if (csum != ntohl (hdr->ih_dcrc)) {
102 printf ("Bad Data CRC\n");
103 SHOW_BOOT_PROGRESS (-12);
104 do_reset (cmdtp, flag, argc, argv);
109 SHOW_BOOT_PROGRESS (11);
111 if ((hdr->ih_os != IH_OS_LINUX) ||
112 (hdr->ih_arch != IH_CPU_MICROBLAZE) ||
113 (hdr->ih_type != IH_TYPE_RAMDISK)) {
114 printf ("No Linux Microblaze Ramdisk Image\n");
115 SHOW_BOOT_PROGRESS (-13);
116 do_reset (cmdtp, flag, argc, argv);
120 * Now check if we have a multifile image
122 } else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
123 ulong tail = ntohl (len_ptr[0]) % 4;
125 SHOW_BOOT_PROGRESS (13);
127 /* skip kernel length and terminator */
128 data = (ulong) (&len_ptr[2]);
129 /* skip any additional image length fields */
130 for (i = 1; len_ptr[i]; ++i)
132 /* add kernel length, and align */
133 data += ntohl (len_ptr[0]);
138 len = ntohl (len_ptr[1]);
144 SHOW_BOOT_PROGRESS (14);
151 printf ("No initrd\n");
157 initrd_end = initrd_start + len;
163 SHOW_BOOT_PROGRESS (15);
166 printf ("## Transferring control to Linux (at address %08lx) ...\n",
170 theKernel (commandline);