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
platform_fixups(void)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
platform_init(unsigned long r3,unsigned long r4,unsigned long r5,unsigned long r6,unsigned long r7)51 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
52 unsigned long r6, unsigned long r7)
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 }
67