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>
 12#include <linux/export.h>
 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
 26int __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
 33void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 34{
 35	return add_memory_region(base, size, BOOT_MEM_RAM);
 
 
 
 
 36}
 37
 38int __init reserve_mem_mach(unsigned long addr, unsigned long size)
 39{
 40	return reserve_bootmem(addr, size, BOOTMEM_DEFAULT);
 41}
 42
 43void __init free_mem_mach(unsigned long addr, unsigned long size)
 
 44{
 45	return free_bootmem(addr, size);
 46}
 47
 48void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 49{
 50	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
 51}
 52
 53#ifdef CONFIG_BLK_DEV_INITRD
 54void __init early_init_dt_setup_initrd_arch(unsigned long start,
 55					    unsigned long end)
 56{
 57	initrd_start = (unsigned long)__va(start);
 58	initrd_end = (unsigned long)__va(end);
 59	initrd_below_start_ok = 1;
 60}
 61#endif
 62
 63void __init early_init_devtree(void *params)
 64{
 65	/* Setup flat device-tree pointer */
 66	initial_boot_params = params;
 67
 68	/* Retrieve various informations from the /chosen node of the
 69	 * device-tree, including the platform type, initrd location and
 70	 * size, and more ...
 71	 */
 72	of_scan_flat_dt(early_init_dt_scan_chosen, arcs_cmdline);
 73
 74
 75	/* Scan memory nodes */
 76	of_scan_flat_dt(early_init_dt_scan_root, NULL);
 77	of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL);
 78}
 79
 80void __init device_tree_init(void)
 81{
 82	unsigned long base, size;
 83
 84	if (!initial_boot_params)
 85		return;
 86
 87	base = virt_to_phys((void *)initial_boot_params);
 88	size = be32_to_cpu(initial_boot_params->totalsize);
 89
 90	/* Before we do anything, lets reserve the dt blob */
 91	reserve_mem_mach(base, size);
 92
 93	unflatten_device_tree();
 94
 95	/* free the space reserved for the dt blob */
 96	free_mem_mach(base, size);
 97}
 98
 99void __init __dt_setup_arch(struct boot_param_header *bph)
100{
101	if (be32_to_cpu(bph->magic) != OF_DT_HEADER) {
102		pr_err("DTB has bad magic, ignoring builtin OF DTB\n");
103
104		return;
 
 
 
 
 
 
105	}
106
107	initial_boot_params = bph;
 
108
109	early_init_devtree(initial_boot_params);
110}

 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>
12#include <linux/export.h>
13#include <linux/errno.h>
14#include <linux/types.h>
15#include <linux/bootmem.h>
 
16#include <linux/debugfs.h>
17#include <linux/of.h>
18#include <linux/of_fdt.h>
 
19#include <linux/of_platform.h>
20
21#include <asm/bootinfo.h>
22#include <asm/page.h>
23#include <asm/prom.h>
24
25static char mips_machine_name[64] = "Unknown";
 
 
 
 
 
26
27__init void mips_set_machine_name(const char *name)
28{
29	if (name == NULL)
30		return;
31
32	strlcpy(mips_machine_name, name, sizeof(mips_machine_name));
33	pr_info("MIPS: machine is %s\n", mips_get_machine_name());
34}
35
36char *mips_get_machine_name(void)
37{
38	return mips_machine_name;
39}
40
41#ifdef CONFIG_USE_OF
42void __init early_init_dt_add_memory_arch(u64 base, u64 size)
43{
44	return add_memory_region(base, size, BOOT_MEM_RAM);
45}
46
47void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
48{
49	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
50}
51
52void __init __dt_setup_arch(void *bph)
 
 
 
 
 
 
 
 
 
 
53{
54	if (!early_init_dt_scan(bph))
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
55		return;
56
57	mips_set_machine_name(of_flat_dt_get_machine_name());
 
 
 
 
 
 
 
 
 
58}
59
60int __init __dt_register_buses(const char *bus0, const char *bus1)
61{
62	static struct of_device_id of_ids[3];
 
63
64	if (!of_have_populated_dt())
65		panic("device tree not present");
66
67	strlcpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
68	if (bus1) {
69		strlcpy(of_ids[1].compatible, bus1,
70			sizeof(of_ids[1].compatible));
71	}
72
73	if (of_platform_populate(NULL, of_ids, NULL, NULL))
74		panic("failed to populate DT");
75
76	return 0;
77}
78
79#endif