projects / deliverable / linux.git / blame
| 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> | |
| 4f246ba3 JB |
45 | #include <asm/mmu.h> |
| 46 | #include <asm/pgtable.h> | |
| 47 | #include <asm/sections.h> | |
| 48 | #include <asm/setup.h> | |
| 49 | ||
| 50 | extern char cmd_line[COMMAND_LINE_SIZE]; | |
| 51 | ||
| 52 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) | |
| 53 | { | |
| 54 | size &= PAGE_MASK; | |
| 55 | memblock_add(base, size); | |
| 56 | } | |
| 57 | ||
| 4f246ba3 JB |
58 | void __init early_init_devtree(void *params) |
| 59 | { | |
| 60 | void *alloc; | |
| 61 | ||
| 62 | /* Setup flat device-tree pointer */ | |
| 63 | initial_boot_params = params; | |
| 64 | ||
| 65 | ||
| 66 | /* Retrieve various informations from the /chosen node of the | |
| 67 | * device-tree, including the platform type, initrd location and | |
| 68 | * size, TCE reserve, and more ... | |
| 69 | */ | |
| 70 | of_scan_flat_dt(early_init_dt_scan_chosen, cmd_line); | |
| 71 | ||
| 72 | /* Scan memory nodes and rebuild MEMBLOCKs */ | |
| 4f246ba3 JB |
73 | of_scan_flat_dt(early_init_dt_scan_root, NULL); |
| 74 | of_scan_flat_dt(early_init_dt_scan_memory, NULL); | |
| 75 | ||
| 76 | /* Save command line for /proc/cmdline and then parse parameters */ | |
| 77 | strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); | |
| 78 | ||
| 1aadc056 | 79 | memblock_allow_resize(); |
| 4f246ba3 JB |
80 | |
| 81 | /* We must copy the flattend device tree from init memory to regular | |
| 82 | * memory because the device tree references the strings in it | |
| 83 | * directly. | |
| 84 | */ | |
| 85 | ||
| 86 | alloc = __va(memblock_alloc(initial_boot_params->totalsize, PAGE_SIZE)); | |
| 87 | ||
| 88 | memcpy(alloc, initial_boot_params, initial_boot_params->totalsize); | |
| 89 | ||
| 90 | initial_boot_params = alloc; | |
| 91 | } | |
| 92 | ||
| 93 | #ifdef CONFIG_BLK_DEV_INITRD | |
| 374d5c99 | 94 | void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) |
| 4f246ba3 JB |
95 | { |
| 96 | initrd_start = (unsigned long)__va(start); | |
| 97 | initrd_end = (unsigned long)__va(end); | |
| 98 | initrd_below_start_ok = 1; | |
| 99 | } | |
| 100 | #endif |