aboutsummaryrefslogtreecommitdiffstats
path: root/arch/score/kernel/setup.c
blob: 6f898c0578781cf0862863d6e23a931c60b12c17 (plain) (blame)
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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
/*
 * arch/score/kernel/setup.c
 *
 * Score Processor version.
 *
 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
 *  Chen Liqin <liqin.chen@sunplusct.com>
 *  Lennox Wu <lennox.wu@sunplusct.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/bootmem.h>
#include <linux/initrd.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/seq_file.h>
#include <linux/screen_info.h>

#include <asm-generic/sections.h>
#include <asm/setup.h>

struct screen_info screen_info;
unsigned long kernelsp;

static char command_line[COMMAND_LINE_SIZE];
static struct resource code_resource = { .name = "Kernel code",};
static struct resource data_resource = { .name = "Kernel data",};

static void __init bootmem_init(void)
{
	unsigned long start_pfn, bootmap_size;
	unsigned long size = initrd_end - initrd_start;

	start_pfn = PFN_UP(__pa(&_end));

	min_low_pfn = PFN_UP(MEMORY_START);
	max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
	max_mapnr = max_low_pfn - min_low_pfn;

	/* Initialize the boot-time allocator with low memory only. */
	bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
					 min_low_pfn, max_low_pfn);
	add_active_range(0, min_low_pfn, max_low_pfn);

	free_bootmem(PFN_PHYS(start_pfn),
		     (max_low_pfn - start_pfn) << PAGE_SHIFT);
	memory_present(0, start_pfn, max_low_pfn);

	/* Reserve space for the bootmem bitmap. */
	reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT);

	if (size == 0) {
		printk(KERN_INFO "Initrd not found or empty");
		goto disable;
	}

	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
		printk(KERN_ERR "Initrd extends beyond end of memory");
		goto disable;
	}

	/* Reserve space for the initrd bitmap. */
	reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
	initrd_below_start_ok = 1;

	pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
		 initrd_start, size);
	return;
disable:
	printk(KERN_CONT " - disabling initrd\n");
	initrd_start = 0;
	initrd_end = 0;
}

static void __init resource_init(void)
{
	struct resource *res;

	code_resource.start = __pa(&_text);
	code_resource.end = __pa(&_etext) - 1;
	data_resource.start = __pa(&_etext);
	data_resource.end = __pa(&_edata) - 1;

	res = alloc_bootmem(sizeof(struct resource));
	res->name = "System RAM";
	res->start = MEMORY_START;
	res->end = MEMORY_START + MEMORY_SIZE - 1;
	res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
	request_resource(&iomem_resource, res);

	request_resource(res, &code_resource);
	request_resource(res, &data_resource);
}

void __init setup_arch(char **cmdline_p)
{
	randomize_va_space = 0;
	*cmdline_p = command_line;

	cpu_cache_init();
	tlb_init();
	bootmem_init();
	paging_init();
	resource_init();
}

static int show_cpuinfo(struct seq_file *m, void *v)
{
	unsigned long n = (unsigned long) v - 1;

	seq_printf(m, "processor\t\t: %ld\n", n);
	seq_printf(m, "\n");

	return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	unsigned long i = *pos;

	return i < 1 ? (void *) (i + 1) : NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
	++*pos;
	return c_start(m, pos);
}

static void c_stop(struct seq_file *m, void *v)
{
}

const struct seq_operations cpuinfo_op = {
	.start	= c_start,
	.next	= c_next,
	.stop	= c_stop,
	.show	= show_cpuinfo,
};

static int __init topology_init(void)
{
	return 0;
}

subsys_initcall(topology_init);