1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Bootwrapper for ePAPR compliant firmwares
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2010 David Gibson <david@gibson.dropbear.id.au>, IBM Corporation.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Based on earlier bootwrappers by:
8*4882a593Smuzhiyun * (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\
9*4882a593Smuzhiyun * and
10*4882a593Smuzhiyun * Scott Wood <scottwood@freescale.com>
11*4882a593Smuzhiyun * Copyright (c) 2007 Freescale Semiconductor, Inc.
12*4882a593Smuzhiyun */
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include "ops.h"
15*4882a593Smuzhiyun #include "stdio.h"
16*4882a593Smuzhiyun #include "io.h"
17*4882a593Smuzhiyun #include <libfdt.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun BSS_STACK(4096);
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define EPAPR_SMAGIC 0x65504150
22*4882a593Smuzhiyun #define EPAPR_EMAGIC 0x45504150
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun static unsigned epapr_magic;
25*4882a593Smuzhiyun static unsigned long ima_size;
26*4882a593Smuzhiyun static unsigned long fdt_addr;
27*4882a593Smuzhiyun
platform_fixups(void)28*4882a593Smuzhiyun static void platform_fixups(void)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun if ((epapr_magic != EPAPR_EMAGIC)
31*4882a593Smuzhiyun && (epapr_magic != EPAPR_SMAGIC))
32*4882a593Smuzhiyun fatal("r6 contained 0x%08x instead of ePAPR magic number\n",
33*4882a593Smuzhiyun epapr_magic);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun if (ima_size < (unsigned long)_end)
36*4882a593Smuzhiyun printf("WARNING: Image loaded outside IMA!"
37*4882a593Smuzhiyun " (_end=%p, ima_size=0x%lx)\n", _end, ima_size);
38*4882a593Smuzhiyun if (ima_size < fdt_addr)
39*4882a593Smuzhiyun printf("WARNING: Device tree address is outside IMA!"
40*4882a593Smuzhiyun "(fdt_addr=0x%lx, ima_size=0x%lx)\n", fdt_addr,
41*4882a593Smuzhiyun ima_size);
42*4882a593Smuzhiyun if (ima_size < fdt_addr + fdt_totalsize((void *)fdt_addr))
43*4882a593Smuzhiyun printf("WARNING: Device tree extends outside IMA!"
44*4882a593Smuzhiyun " (fdt_addr=0x%lx, size=0x%x, ima_size=0x%lx\n",
45*4882a593Smuzhiyun fdt_addr, fdt_totalsize((void *)fdt_addr), ima_size);
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
epapr_platform_init(unsigned long r3,unsigned long r4,unsigned long r5,unsigned long r6,unsigned long r7)48*4882a593Smuzhiyun void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
49*4882a593Smuzhiyun unsigned long r6, unsigned long r7)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun epapr_magic = r6;
52*4882a593Smuzhiyun ima_size = r7;
53*4882a593Smuzhiyun fdt_addr = r3;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun /* FIXME: we should process reserve entries */
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun simple_alloc_init(_end, ima_size - (unsigned long)_end, 32, 64);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun fdt_init((void *)fdt_addr);
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun serial_console_init();
62*4882a593Smuzhiyun platform_ops.fixups = platform_fixups;
63*4882a593Smuzhiyun }
64