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 | |
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(fmt: "WARNING: Image loaded outside IMA!" |
37 | " (_end=%p, ima_size=0x%lx)\n" , _end, ima_size); |
38 | if (ima_size < fdt_addr) |
39 | printf(fmt: "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(fmt: "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 | |
48 | void 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(base: _end, heap_size: ima_size - (unsigned long)_end, granularity: 32, max_allocs: 64); |
58 | |
59 | fdt_init(blob: (void *)fdt_addr); |
60 | |
61 | serial_console_init(); |
62 | platform_ops.fixups = platform_fixups; |
63 | } |
64 | |