1// SPDX-License-Identifier: GPL-2.0-only
 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.
 
 
 
 
12 */
13
14#include "ops.h"
15#include "stdio.h"
16#include "io.h"
17#include <libfdt.h>
18
19BSS_STACK(4096);
20
21#define EPAPR_SMAGIC	0x65504150
22#define EPAPR_EMAGIC	0x45504150
23
24static unsigned epapr_magic;
25static unsigned long ima_size;
26static unsigned long fdt_addr;
27
28static 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
48void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
49			 unsigned long r6, unsigned long r7)
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}

 
 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
22BSS_STACK(4096);
23
24#define EPAPR_SMAGIC	0x65504150
25#define EPAPR_EMAGIC	0x45504150
26
27static unsigned epapr_magic;
28static unsigned long ima_size;
29static unsigned long fdt_addr;
30
31static 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
51void epapr_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}