1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2013 John Crispin <john@phrozen.org>
*/
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/init.h>
#include <linux/sizes.h>
#include <linux/of_fdt.h>
#include <linux/kernel.h>
#include <linux/memblock.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <asm/reboot.h>
#include <asm/bootinfo.h>
#include <asm/addrspace.h>
#include <asm/prom.h>
#include "common.h"
__iomem void *rt_sysc_membase;
__iomem void *rt_memc_membase;
__iomem void *plat_of_remap_node(const char *node)
{
struct resource res;
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, node);
if (!np)
panic("Failed to find %s node", node);
if (of_address_to_resource(np, 0, &res))
panic("Failed to get resource for %s", node);
if (!request_mem_region(res.start,
resource_size(&res),
res.name))
panic("Failed to request resources for %s", node);
return ioremap(res.start, resource_size(&res));
}
void __init device_tree_init(void)
{
unflatten_and_copy_device_tree();
}
static int memory_dtb;
static int __init early_init_dt_find_memory(unsigned long node,
const char *uname, int depth, void *data)
{
if (depth == 1 && !strcmp(uname, "memory@0"))
memory_dtb = 1;
return 0;
}
void __init plat_mem_setup(void)
{
void *dtb = NULL;
set_io_port_base(KSEG1);
/*
* Load the builtin devicetree. This causes the chosen node to be
* parsed resulting in our memory appearing. fw_passed_dtb is used
* by CONFIG_MIPS_APPENDED_RAW_DTB as well.
*/
if (fw_passed_dtb)
dtb = (void *)fw_passed_dtb;
else if (__dtb_start != __dtb_end)
dtb = (void *)__dtb_start;
__dt_setup_arch(dtb);
of_scan_flat_dt(early_init_dt_find_memory, NULL);
if (memory_dtb)
of_scan_flat_dt(early_init_dt_scan_memory, NULL);
else if (soc_info.mem_size)
memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M);
else
detect_memory_region(soc_info.mem_base,
soc_info.mem_size_min * SZ_1M,
soc_info.mem_size_max * SZ_1M);
}
static int __init plat_of_setup(void)
{
__dt_register_buses(soc_info.compatible, "palmbus");
/* make sure that the reset controller is setup early */
ralink_rst_init();
return 0;
}
arch_initcall(plat_of_setup);
|
