projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f2ffa5ab DD |
1 | /* |
| 2 | * MIPS support for CONFIG_OF device tree support | |
| 3 | * | |
| 4 | * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <linux/init.h> | |
| 73bc256d | 12 | #include <linux/export.h> |
| f2ffa5ab DD |
13 | #include <linux/errno.h> |
| 14 | #include <linux/types.h> | |
| 15 | #include <linux/bootmem.h> | |
| 16 | #include <linux/initrd.h> | |
| 17 | #include <linux/debugfs.h> | |
| 18 | #include <linux/of.h> | |
| 19 | #include <linux/of_fdt.h> | |
| 20 | #include <linux/of_irq.h> | |
| 21 | #include <linux/of_platform.h> | |
| 22 | ||
| 23 | #include <asm/page.h> | |
| 24 | #include <asm/prom.h> | |
| 25 | ||
| 26 | int __init early_init_dt_scan_memory_arch(unsigned long node, | |
| 27 | const char *uname, int depth, | |
| 28 | void *data) | |
| 29 | { | |
| 30 | return early_init_dt_scan_memory(node, uname, depth, data); | |
| 31 | } | |
| 32 | ||
| 33 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) | |
| 34 | { | |
| 35 | return add_memory_region(base, size, BOOT_MEM_RAM); | |
| 36 | } | |
| 37 | ||
| 672c5446 | 38 | void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) |
| f2ffa5ab | 39 | { |
| 672c5446 | 40 | return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS)); |
| f2ffa5ab DD |
41 | } |
| 42 | ||
| 43 | #ifdef CONFIG_BLK_DEV_INITRD | |
| 44 | void __init early_init_dt_setup_initrd_arch(unsigned long start, | |
| 45 | unsigned long end) | |
| 46 | { | |
| 47 | initrd_start = (unsigned long)__va(start); | |
| 48 | initrd_end = (unsigned long)__va(end); | |
| 49 | initrd_below_start_ok = 1; | |
| 50 | } | |
| 51 | #endif | |
| 52 | ||
| f2ffa5ab DD |
53 | void __init early_init_devtree(void *params) |
| 54 | { | |
| 55 | /* Setup flat device-tree pointer */ | |
| 56 | initial_boot_params = params; | |
| 57 | ||
| 58 | /* Retrieve various informations from the /chosen node of the | |
| 59 | * device-tree, including the platform type, initrd location and | |
| 60 | * size, and more ... | |
| 61 | */ | |
| 85f60ae4 GL |
62 | of_scan_flat_dt(early_init_dt_scan_chosen, arcs_cmdline); |
| 63 | ||
| f2ffa5ab DD |
64 | |
| 65 | /* Scan memory nodes */ | |
| 66 | of_scan_flat_dt(early_init_dt_scan_root, NULL); | |
| 67 | of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL); | |
| 68 | } | |
| 69 | ||
| 7d6168e5 RB |
70 | void __init __dt_setup_arch(struct boot_param_header *bph) |
| 71 | { | |
| 72 | if (be32_to_cpu(bph->magic) != OF_DT_HEADER) { | |
| 73 | pr_err("DTB has bad magic, ignoring builtin OF DTB\n"); | |
| 74 | ||
| 75 | return; | |
| 76 | } | |
| 77 | ||
| 78 | initial_boot_params = bph; | |
| 40e91aec JC |
79 | |
| 80 | early_init_devtree(initial_boot_params); | |
| 7d6168e5 | 81 | } |