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	strlcpy(mips_machine_name, name, sizeof(mips_machine_name));
30	pr_info("MIPS: machine is %s\n", mips_get_machine_name());
31}
32
33char *mips_get_machine_name(void)
34{
35	return mips_machine_name;
36}
37
38#ifdef CONFIG_USE_OF
39void __init early_init_dt_add_memory_arch(u64 base, u64 size)
40{
41	if (base >= PHYS_ADDR_MAX) {
42		pr_warn("Trying to add an invalid memory region, skipped\n");
43		return;
44	}
45
46	/* Truncate the passed memory region instead of type casting */
47	if (base + size - 1 >= PHYS_ADDR_MAX || base + size < base) {
48		pr_warn("Truncate memory region %llx @ %llx to size %llx\n",
49			size, base, PHYS_ADDR_MAX - base);
50		size = PHYS_ADDR_MAX - base;
51	}
52
53	add_memory_region(base, size, BOOT_MEM_RAM);
54}
55
56int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
57					phys_addr_t size, bool nomap)
58{
59	add_memory_region(base, size,
60			  nomap ? BOOT_MEM_NOMAP : BOOT_MEM_RESERVED);
61
62	return 0;
63}
64
65void __init __dt_setup_arch(void *bph)
66{
67	if (!early_init_dt_scan(bph))
68		return;
69
70	mips_set_machine_name(of_flat_dt_get_machine_name());
71}
72
73int __init __dt_register_buses(const char *bus0, const char *bus1)
74{
75	static struct of_device_id of_ids[3];
76
77	if (!of_have_populated_dt())
78		panic("device tree not present");
79
80	strlcpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
81	if (bus1) {
82		strlcpy(of_ids[1].compatible, bus1,
83			sizeof(of_ids[1].compatible));
84	}
85
86	if (of_platform_populate(NULL, of_ids, NULL, NULL))
87		panic("failed to populate DT");
88
89	return 0;
90}
91
92#endif

 
 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
 
20#include <asm/page.h>
21#include <asm/prom.h>
22
23static char mips_machine_name[64] = "Unknown";
24
25__init void mips_set_machine_name(const char *name)
26{
27	if (name == NULL)
28		return;
29
30	strlcpy(mips_machine_name, name, sizeof(mips_machine_name));
31	pr_info("MIPS: machine is %s\n", mips_get_machine_name());
32}
33
34char *mips_get_machine_name(void)
35{
36	return mips_machine_name;
37}
38
39#ifdef CONFIG_OF
40void __init early_init_dt_add_memory_arch(u64 base, u64 size)
41{
42	return add_memory_region(base, size, BOOT_MEM_RAM);
 
 
 
 
 
 
 
 
 
 
 
 
43}
44
45void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 
46{
47	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
 
 
 
48}
49
50void __init __dt_setup_arch(struct boot_param_header *bph)
51{
52	if (!early_init_dt_scan(bph))
53		return;
54
55	mips_set_machine_name(of_flat_dt_get_machine_name());
56}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
57#endif