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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Copyright (C) Paul Mackerras 1997. | |
1da177e4 LT |
4 | */ |
5 | #include <stdarg.h> | |
decd300b | 6 | #include <stddef.h> |
b2c5f619 MG |
7 | #include "types.h" |
8 | #include "elf.h" | |
decd300b OH |
9 | #include "string.h" |
10 | #include "stdio.h" | |
b2c5f619 MG |
11 | #include "page.h" |
12 | #include "ops.h" | |
7840e5e9 | 13 | |
2e601613 | 14 | #include "of.h" |
1da177e4 | 15 | |
b2c5f619 MG |
16 | /* Value picked to match that used by yaboot */ |
17 | #define PROG_START 0x01400000 /* only used on 64-bit systems */ | |
18 | #define RAM_END (512<<20) /* Fixme: use OF */ | |
19 | #define ONE_MB 0x100000 | |
20 | ||
b2c5f619 MG |
21 | |
22 | ||
23 | static unsigned long claim_base; | |
24 | ||
0c9fa291 BH |
25 | void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5, |
26 | unsigned long r6, unsigned long r7); | |
27 | ||
4ca478e6 | 28 | static void *of_try_claim(unsigned long size) |
b2c5f619 MG |
29 | { |
30 | unsigned long addr = 0; | |
b2c5f619 | 31 | |
c998de14 | 32 | if (claim_base == 0) |
b2c5f619 | 33 | claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB); |
b2c5f619 MG |
34 | |
35 | for(; claim_base < RAM_END; claim_base += ONE_MB) { | |
36 | #ifdef DEBUG | |
37 | printf(" trying: 0x%08lx\n\r", claim_base); | |
38 | #endif | |
034e55e6 CLG |
39 | addr = (unsigned long) of_claim(claim_base, size, 0); |
40 | if (addr != PROM_ERROR) | |
b2c5f619 MG |
41 | break; |
42 | } | |
43 | if (addr == 0) | |
44 | return NULL; | |
45 | claim_base = PAGE_ALIGN(claim_base + size); | |
46 | return (void *)addr; | |
47 | } | |
48 | ||
49 | static void of_image_hdr(const void *hdr) | |
50 | { | |
51 | const Elf64_Ehdr *elf64 = hdr; | |
52 | ||
53 | if (elf64->e_ident[EI_CLASS] == ELFCLASS64) { | |
54 | /* | |
55 | * Maintain a "magic" minimum address. This keeps some older | |
56 | * firmware platforms running. | |
57 | */ | |
58 | if (claim_base < PROG_START) | |
59 | claim_base = PROG_START; | |
60 | } | |
61 | } | |
62 | ||
0c9fa291 | 63 | static void of_platform_init(unsigned long a1, unsigned long a2, void *promptr) |
b2c5f619 | 64 | { |
b2c5f619 MG |
65 | platform_ops.image_hdr = of_image_hdr; |
66 | platform_ops.malloc = of_try_claim; | |
b2c5f619 | 67 | platform_ops.exit = of_exit; |
79c85419 | 68 | platform_ops.vmlinux_alloc = of_vmlinux_alloc; |
b2c5f619 MG |
69 | |
70 | dt_ops.finddevice = of_finddevice; | |
71 | dt_ops.getprop = of_getprop; | |
72 | dt_ops.setprop = of_setprop; | |
b2c5f619 | 73 | |
2e601613 | 74 | of_console_init(); |
b2c5f619 | 75 | |
2e601613 | 76 | of_init(promptr); |
cd197ffc | 77 | loader_info.promptr = promptr; |
390cbb56 PM |
78 | if (a1 && a2 && a2 != 0xdeadbeef) { |
79 | loader_info.initrd_addr = a1; | |
80 | loader_info.initrd_size = a2; | |
81 | } | |
b2c5f619 | 82 | } |
0c9fa291 BH |
83 | |
84 | void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, | |
85 | unsigned long r6, unsigned long r7) | |
86 | { | |
87 | /* Detect OF vs. ePAPR boot */ | |
88 | if (r5) | |
89 | of_platform_init(r3, r4, (void *)r5); | |
90 | else | |
91 | epapr_platform_init(r3, r4, r5, r6, r7); | |
92 | } | |
93 |