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1da177e4 LT |
1 | /* |
2 | * Copyright (C) Paul Mackerras 1997. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | */ | |
9 | #include <stdarg.h> | |
decd300b | 10 | #include <stddef.h> |
b2c5f619 MG |
11 | #include "types.h" |
12 | #include "elf.h" | |
decd300b OH |
13 | #include "string.h" |
14 | #include "stdio.h" | |
b2c5f619 MG |
15 | #include "page.h" |
16 | #include "ops.h" | |
7840e5e9 | 17 | |
2e601613 | 18 | #include "of.h" |
1da177e4 | 19 | |
b2c5f619 MG |
20 | /* Value picked to match that used by yaboot */ |
21 | #define PROG_START 0x01400000 /* only used on 64-bit systems */ | |
22 | #define RAM_END (512<<20) /* Fixme: use OF */ | |
23 | #define ONE_MB 0x100000 | |
24 | ||
b2c5f619 MG |
25 | |
26 | ||
27 | static unsigned long claim_base; | |
28 | ||
0c9fa291 BH |
29 | void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5, |
30 | unsigned long r6, unsigned long r7); | |
31 | ||
4ca478e6 | 32 | static void *of_try_claim(unsigned long size) |
b2c5f619 MG |
33 | { |
34 | unsigned long addr = 0; | |
b2c5f619 | 35 | |
c998de14 | 36 | if (claim_base == 0) |
b2c5f619 | 37 | claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB); |
b2c5f619 MG |
38 | |
39 | for(; claim_base < RAM_END; claim_base += ONE_MB) { | |
40 | #ifdef DEBUG | |
41 | printf(" trying: 0x%08lx\n\r", claim_base); | |
42 | #endif | |
034e55e6 CLG |
43 | addr = (unsigned long) of_claim(claim_base, size, 0); |
44 | if (addr != PROM_ERROR) | |
b2c5f619 MG |
45 | break; |
46 | } | |
47 | if (addr == 0) | |
48 | return NULL; | |
49 | claim_base = PAGE_ALIGN(claim_base + size); | |
50 | return (void *)addr; | |
51 | } | |
52 | ||
53 | static void of_image_hdr(const void *hdr) | |
54 | { | |
55 | const Elf64_Ehdr *elf64 = hdr; | |
56 | ||
57 | if (elf64->e_ident[EI_CLASS] == ELFCLASS64) { | |
58 | /* | |
59 | * Maintain a "magic" minimum address. This keeps some older | |
60 | * firmware platforms running. | |
61 | */ | |
62 | if (claim_base < PROG_START) | |
63 | claim_base = PROG_START; | |
64 | } | |
65 | } | |
66 | ||
0c9fa291 | 67 | static void of_platform_init(unsigned long a1, unsigned long a2, void *promptr) |
b2c5f619 | 68 | { |
b2c5f619 MG |
69 | platform_ops.image_hdr = of_image_hdr; |
70 | platform_ops.malloc = of_try_claim; | |
b2c5f619 | 71 | platform_ops.exit = of_exit; |
79c85419 | 72 | platform_ops.vmlinux_alloc = of_vmlinux_alloc; |
b2c5f619 MG |
73 | |
74 | dt_ops.finddevice = of_finddevice; | |
75 | dt_ops.getprop = of_getprop; | |
76 | dt_ops.setprop = of_setprop; | |
b2c5f619 | 77 | |
2e601613 | 78 | of_console_init(); |
b2c5f619 | 79 | |
2e601613 | 80 | of_init(promptr); |
cd197ffc | 81 | loader_info.promptr = promptr; |
390cbb56 PM |
82 | if (a1 && a2 && a2 != 0xdeadbeef) { |
83 | loader_info.initrd_addr = a1; | |
84 | loader_info.initrd_size = a2; | |
85 | } | |
b2c5f619 | 86 | } |
0c9fa291 BH |
87 | |
88 | void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, | |
89 | unsigned long r6, unsigned long r7) | |
90 | { | |
91 | /* Detect OF vs. ePAPR boot */ | |
92 | if (r5) | |
93 | of_platform_init(r3, r4, (void *)r5); | |
94 | else | |
95 | epapr_platform_init(r3, r4, r5, r6, r7); | |
96 | } | |
97 |