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[linux-2.6] / arch / powerpc / boot / cuboot-83xx.c
1 /*
2  * Old U-boot compatibility for 83xx
3  *
4  * Author: Scott Wood <scottwood@freescale.com>
5  *
6  * Copyright (c) 2007 Freescale Semiconductor, Inc.
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License version 2 as published
10  * by the Free Software Foundation.
11  */
12
13 #include "ops.h"
14 #include "stdio.h"
15
16 #define TARGET_83xx
17 #include "ppcboot.h"
18
19 static bd_t bd;
20 extern char _end[];
21 extern char _dtb_start[], _dtb_end[];
22
23 static void platform_fixups(void)
24 {
25         void *soc;
26
27         dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
28         dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr);
29         dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
30
31         /* Unfortunately, the specific model number is encoded in the
32          * soc node name in existing dts files -- once that is fixed,
33          * this can do a simple path lookup.
34          */
35         soc = find_node_by_devtype(NULL, "soc");
36         if (soc) {
37                 void *serial = NULL;
38
39                 setprop(soc, "bus-frequency", &bd.bi_busfreq,
40                         sizeof(bd.bi_busfreq));
41
42                 while ((serial = find_node_by_devtype(serial, "serial"))) {
43                         if (get_parent(serial) != soc)
44                                 continue;
45
46                         setprop(serial, "clock-frequency", &bd.bi_busfreq,
47                                 sizeof(bd.bi_busfreq));
48                 }
49         }
50 }
51
52 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
53                    unsigned long r6, unsigned long r7)
54 {
55         unsigned long end_of_ram = bd.bi_memstart + bd.bi_memsize;
56         unsigned long avail_ram = end_of_ram - (unsigned long)_end;
57
58         memcpy(&bd, (bd_t *)r3, sizeof(bd));
59         loader_info.initrd_addr = r4;
60         loader_info.initrd_size = r4 ? r5 : 0;
61         loader_info.cmdline = (char *)r6;
62         loader_info.cmdline_len = r7 - r6;
63
64         simple_alloc_init(_end, avail_ram - 1024*1024, 32, 64);
65         ft_init(_dtb_start, _dtb_end - _dtb_start, 32);
66         serial_console_init();
67         platform_ops.fixups = platform_fixups;
68 }