Commit | Line | Data |
---|---|---|
4f246ba3 JB |
1 | /* |
2 | * OpenRISC prom.c | |
3 | * | |
4 | * Linux architectural port borrowing liberally from similar works of | |
5 | * others. All original copyrights apply as per the original source | |
6 | * declaration. | |
7 | * | |
8 | * Modifications for the OpenRISC architecture: | |
9 | * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | * | |
16 | * Architecture specific procedures for creating, accessing and | |
17 | * interpreting the device tree. | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <stdarg.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/threads.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/pci.h> | |
29 | #include <linux/stringify.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/initrd.h> | |
32 | #include <linux/bitops.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/kexec.h> | |
35 | #include <linux/debugfs.h> | |
36 | #include <linux/irq.h> | |
37 | #include <linux/memblock.h> | |
38 | #include <linux/of_fdt.h> | |
39 | ||
40 | #include <asm/prom.h> | |
41 | #include <asm/page.h> | |
42 | #include <asm/processor.h> | |
43 | #include <asm/irq.h> | |
44 | #include <linux/io.h> | |
45 | #include <asm/system.h> | |
46 | #include <asm/mmu.h> | |
47 | #include <asm/pgtable.h> | |
48 | #include <asm/sections.h> | |
49 | #include <asm/setup.h> | |
50 | ||
51 | extern char cmd_line[COMMAND_LINE_SIZE]; | |
52 | ||
53 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) | |
54 | { | |
55 | size &= PAGE_MASK; | |
56 | memblock_add(base, size); | |
57 | } | |
58 | ||
59 | void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) | |
60 | { | |
61 | return __va(memblock_alloc(size, align)); | |
62 | } | |
63 | ||
64 | void __init early_init_devtree(void *params) | |
65 | { | |
66 | void *alloc; | |
67 | ||
68 | /* Setup flat device-tree pointer */ | |
69 | initial_boot_params = params; | |
70 | ||
71 | ||
72 | /* Retrieve various informations from the /chosen node of the | |
73 | * device-tree, including the platform type, initrd location and | |
74 | * size, TCE reserve, and more ... | |
75 | */ | |
76 | of_scan_flat_dt(early_init_dt_scan_chosen, cmd_line); | |
77 | ||
78 | /* Scan memory nodes and rebuild MEMBLOCKs */ | |
4f246ba3 JB |
79 | of_scan_flat_dt(early_init_dt_scan_root, NULL); |
80 | of_scan_flat_dt(early_init_dt_scan_memory, NULL); | |
81 | ||
82 | /* Save command line for /proc/cmdline and then parse parameters */ | |
83 | strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); | |
84 | ||
1aadc056 | 85 | memblock_allow_resize(); |
4f246ba3 JB |
86 | |
87 | /* We must copy the flattend device tree from init memory to regular | |
88 | * memory because the device tree references the strings in it | |
89 | * directly. | |
90 | */ | |
91 | ||
92 | alloc = __va(memblock_alloc(initial_boot_params->totalsize, PAGE_SIZE)); | |
93 | ||
94 | memcpy(alloc, initial_boot_params, initial_boot_params->totalsize); | |
95 | ||
96 | initial_boot_params = alloc; | |
97 | } | |
98 | ||
99 | #ifdef CONFIG_BLK_DEV_INITRD | |
100 | void __init early_init_dt_setup_initrd_arch(unsigned long start, | |
101 | unsigned long end) | |
102 | { | |
103 | initrd_start = (unsigned long)__va(start); | |
104 | initrd_end = (unsigned long)__va(end); | |
105 | initrd_below_start_ok = 1; | |
106 | } | |
107 | #endif |