prom.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * MIPS support for CONFIG_OF device tree support
 4 *
 5 * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com>
 6 */
 7
 8#include <linux/init.h>
 9#include <linux/export.h>
10#include <linux/errno.h>
11#include <linux/types.h>
12#include <linux/memblock.h>
13#include <linux/debugfs.h>
14#include <linux/of.h>
15#include <linux/of_fdt.h>
16#include <linux/of_platform.h>
17
18#include <asm/bootinfo.h>
19#include <asm/page.h>
20#include <asm/prom.h>
21
22static char mips_machine_name[64] = "Unknown";
23
24__init void mips_set_machine_name(const char *name)
25{
26	if (name == NULL)
27		return;
28
29	strscpy(mips_machine_name, name, sizeof(mips_machine_name));
30	pr_info("MIPS: machine is %s\n", mips_get_machine_name());
31
32	dump_stack_set_arch_desc(name);
33}
34
35char *mips_get_machine_name(void)
36{
37	return mips_machine_name;
38}
39
40#ifdef CONFIG_USE_OF
41
42void __init __dt_setup_arch(void *bph)
43{
44	if (!early_init_dt_scan(bph, __pa(bph)))
45		return;
46
47	mips_set_machine_name(of_flat_dt_get_machine_name());
48}
49
50int __init __dt_register_buses(const char *bus0, const char *bus1)
51{
52	static struct of_device_id of_ids[3];
53
54	if (!of_have_populated_dt())
55		panic("device tree not present");
56
57	strscpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
58	if (bus1) {
59		strscpy(of_ids[1].compatible, bus1,
60			sizeof(of_ids[1].compatible));
61	}
62
63	if (of_platform_populate(NULL, of_ids, NULL, NULL))
64		panic("failed to populate DT");
65
66	return 0;
67}
68
69void __weak __init device_tree_init(void)
70{
71	unflatten_and_copy_device_tree();
72}
73
74#endif