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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6c5b59b9 DG |
2 | /* |
3 | * Bootwrapper for ePAPR compliant firmwares | |
4 | * | |
5 | * Copyright 2010 David Gibson <david@gibson.dropbear.id.au>, IBM Corporation. | |
6 | * | |
7 | * Based on earlier bootwrappers by: | |
8 | * (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\ | |
9 | * and | |
10 | * Scott Wood <scottwood@freescale.com> | |
11 | * Copyright (c) 2007 Freescale Semiconductor, Inc. | |
6c5b59b9 DG |
12 | */ |
13 | ||
14 | #include "ops.h" | |
15 | #include "stdio.h" | |
16 | #include "io.h" | |
17 | #include <libfdt.h> | |
18 | ||
19 | BSS_STACK(4096); | |
20 | ||
21 | #define EPAPR_SMAGIC 0x65504150 | |
22 | #define EPAPR_EMAGIC 0x45504150 | |
23 | ||
24 | static unsigned epapr_magic; | |
25 | static unsigned long ima_size; | |
26 | static unsigned long fdt_addr; | |
27 | ||
28 | static void platform_fixups(void) | |
29 | { | |
30 | if ((epapr_magic != EPAPR_EMAGIC) | |
31 | && (epapr_magic != EPAPR_SMAGIC)) | |
32 | fatal("r6 contained 0x%08x instead of ePAPR magic number\n", | |
33 | epapr_magic); | |
34 | ||
35 | if (ima_size < (unsigned long)_end) | |
36 | printf("WARNING: Image loaded outside IMA!" | |
37 | " (_end=%p, ima_size=0x%lx)\n", _end, ima_size); | |
38 | if (ima_size < fdt_addr) | |
39 | printf("WARNING: Device tree address is outside IMA!" | |
40 | "(fdt_addr=0x%lx, ima_size=0x%lx)\n", fdt_addr, | |
41 | ima_size); | |
42 | if (ima_size < fdt_addr + fdt_totalsize((void *)fdt_addr)) | |
43 | printf("WARNING: Device tree extends outside IMA!" | |
44 | " (fdt_addr=0x%lx, size=0x%x, ima_size=0x%lx\n", | |
45 | fdt_addr, fdt_totalsize((void *)fdt_addr), ima_size); | |
46 | } | |
47 | ||
0c9fa291 BH |
48 | void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5, |
49 | unsigned long r6, unsigned long r7) | |
6c5b59b9 DG |
50 | { |
51 | epapr_magic = r6; | |
52 | ima_size = r7; | |
53 | fdt_addr = r3; | |
54 | ||
55 | /* FIXME: we should process reserve entries */ | |
56 | ||
57 | simple_alloc_init(_end, ima_size - (unsigned long)_end, 32, 64); | |
58 | ||
59 | fdt_init((void *)fdt_addr); | |
60 | ||
61 | serial_console_init(); | |
62 | platform_ops.fixups = platform_fixups; | |
63 | } |