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
 51extern char cmd_line[COMMAND_LINE_SIZE];
 52
 53void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 54{
 55	size &= PAGE_MASK;
 56	memblock_add(base, size);
 57}
 58
 59void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 60{
 61	return __va(memblock_alloc(size, align));
 62}
 63
 64void __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 */
 79	memblock_init();
 80	of_scan_flat_dt(early_init_dt_scan_root, NULL);
 81	of_scan_flat_dt(early_init_dt_scan_memory, NULL);
 82
 83	/* Save command line for /proc/cmdline and then parse parameters */
 84	strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);
 85
 86	memblock_analyze();
 87
 88	/* We must copy the flattend device tree from init memory to regular
 89	 * memory because the device tree references the strings in it
 90	 * directly.
 91	 */
 92
 93	alloc = __va(memblock_alloc(initial_boot_params->totalsize, PAGE_SIZE));
 94
 95	memcpy(alloc, initial_boot_params, initial_boot_params->totalsize);
 96
 97	initial_boot_params = alloc;
 98}
 99
100#ifdef CONFIG_BLK_DEV_INITRD
101void __init early_init_dt_setup_initrd_arch(unsigned long start,
102		unsigned long end)
103{
104	initrd_start = (unsigned long)__va(start);
105	initrd_end = (unsigned long)__va(end);
106	initrd_below_start_ok = 1;
107}
108#endif

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * OpenRISC prom.c
 4 *
 5 * Linux architectural port borrowing liberally from similar works of
 6 * others.  All original copyrights apply as per the original source
 7 * declaration.
 8 *
 9 * Modifications for the OpenRISC architecture:
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
11 *
 
 
 
 
 
12 * Architecture specific procedures for creating, accessing and
13 * interpreting the device tree.
 
14 */
15
 
 
 
16#include <linux/init.h>
 
 
17#include <linux/types.h>
 
 
 
 
 
 
 
 
 
18#include <linux/memblock.h>
19#include <linux/of_fdt.h>
20
 
21#include <asm/page.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
22
23void __init early_init_devtree(void *params)
24{
25	early_init_dt_scan(params);
26	memblock_allow_resize();
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
27}