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6c5b59b9 DG |
1 | /* |
2 | * Bootwrapper for ePAPR compliant firmwares | |
3 | * | |
4 | * Copyright 2010 David Gibson <david@gibson.dropbear.id.au>, IBM Corporation. | |
5 | * | |
6 | * Based on earlier bootwrappers by: | |
7 | * (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\ | |
8 | * and | |
9 | * Scott Wood <scottwood@freescale.com> | |
10 | * Copyright (c) 2007 Freescale Semiconductor, Inc. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License version 2 as published | |
14 | * by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include "ops.h" | |
18 | #include "stdio.h" | |
19 | #include "io.h" | |
20 | #include <libfdt.h> | |
21 | ||
22 | BSS_STACK(4096); | |
23 | ||
24 | #define EPAPR_SMAGIC 0x65504150 | |
25 | #define EPAPR_EMAGIC 0x45504150 | |
26 | ||
27 | static unsigned epapr_magic; | |
28 | static unsigned long ima_size; | |
29 | static unsigned long fdt_addr; | |
30 | ||
31 | static void platform_fixups(void) | |
32 | { | |
33 | if ((epapr_magic != EPAPR_EMAGIC) | |
34 | && (epapr_magic != EPAPR_SMAGIC)) | |
35 | fatal("r6 contained 0x%08x instead of ePAPR magic number\n", | |
36 | epapr_magic); | |
37 | ||
38 | if (ima_size < (unsigned long)_end) | |
39 | printf("WARNING: Image loaded outside IMA!" | |
40 | " (_end=%p, ima_size=0x%lx)\n", _end, ima_size); | |
41 | if (ima_size < fdt_addr) | |
42 | printf("WARNING: Device tree address is outside IMA!" | |
43 | "(fdt_addr=0x%lx, ima_size=0x%lx)\n", fdt_addr, | |
44 | ima_size); | |
45 | if (ima_size < fdt_addr + fdt_totalsize((void *)fdt_addr)) | |
46 | printf("WARNING: Device tree extends outside IMA!" | |
47 | " (fdt_addr=0x%lx, size=0x%x, ima_size=0x%lx\n", | |
48 | fdt_addr, fdt_totalsize((void *)fdt_addr), ima_size); | |
49 | } | |
50 | ||
0c9fa291 BH |
51 | void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5, |
52 | unsigned long r6, unsigned long r7) | |
6c5b59b9 DG |
53 | { |
54 | epapr_magic = r6; | |
55 | ima_size = r7; | |
56 | fdt_addr = r3; | |
57 | ||
58 | /* FIXME: we should process reserve entries */ | |
59 | ||
60 | simple_alloc_init(_end, ima_size - (unsigned long)_end, 32, 64); | |
61 | ||
62 | fdt_init((void *)fdt_addr); | |
63 | ||
64 | serial_console_init(); | |
65 | platform_ops.fixups = platform_fixups; | |
66 | } |