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6bc9a396 CL |
1 | /* |
2 | * arch/score/kernel/setup.c | |
3 | * | |
4 | * Score Processor version. | |
5 | * | |
6 | * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. | |
7 | * Chen Liqin <liqin.chen@sunplusct.com> | |
8 | * Lennox Wu <lennox.wu@sunplusct.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, see the file COPYING, or write | |
22 | * to the Free Software Foundation, Inc., | |
23 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
24 | */ | |
25 | ||
26 | #include <linux/bootmem.h> | |
27 | #include <linux/initrd.h> | |
28 | #include <linux/ioport.h> | |
a2bf79e7 | 29 | #include <linux/memblock.h> |
324f40fb | 30 | #include <linux/mm.h> |
6bc9a396 CL |
31 | #include <linux/seq_file.h> |
32 | #include <linux/screen_info.h> | |
33 | ||
34 | #include <asm-generic/sections.h> | |
324f40fb | 35 | #include <asm/setup.h> |
6bc9a396 CL |
36 | |
37 | struct screen_info screen_info; | |
38 | unsigned long kernelsp; | |
39 | ||
40 | static char command_line[COMMAND_LINE_SIZE]; | |
41 | static struct resource code_resource = { .name = "Kernel code",}; | |
42 | static struct resource data_resource = { .name = "Kernel data",}; | |
43 | ||
44 | static void __init bootmem_init(void) | |
45 | { | |
324f40fb | 46 | unsigned long start_pfn, bootmap_size; |
6bc9a396 CL |
47 | unsigned long size = initrd_end - initrd_start; |
48 | ||
324f40fb | 49 | start_pfn = PFN_UP(__pa(&_end)); |
6bc9a396 | 50 | |
324f40fb CL |
51 | min_low_pfn = PFN_UP(MEMORY_START); |
52 | max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE); | |
202b864a | 53 | max_mapnr = max_low_pfn - min_low_pfn; |
6bc9a396 CL |
54 | |
55 | /* Initialize the boot-time allocator with low memory only. */ | |
324f40fb | 56 | bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, |
6bc9a396 | 57 | min_low_pfn, max_low_pfn); |
a2bf79e7 TH |
58 | memblock_add_node(PFN_PHYS(min_low_pfn), |
59 | PFN_PHYS(max_low_pfn - min_low_pfn), 0); | |
6bc9a396 | 60 | |
324f40fb CL |
61 | free_bootmem(PFN_PHYS(start_pfn), |
62 | (max_low_pfn - start_pfn) << PAGE_SHIFT); | |
63 | memory_present(0, start_pfn, max_low_pfn); | |
6bc9a396 CL |
64 | |
65 | /* Reserve space for the bootmem bitmap. */ | |
324f40fb | 66 | reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT); |
6bc9a396 CL |
67 | |
68 | if (size == 0) { | |
69 | printk(KERN_INFO "Initrd not found or empty"); | |
70 | goto disable; | |
71 | } | |
72 | ||
73 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { | |
74 | printk(KERN_ERR "Initrd extends beyond end of memory"); | |
75 | goto disable; | |
76 | } | |
77 | ||
78 | /* Reserve space for the initrd bitmap. */ | |
79 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); | |
80 | initrd_below_start_ok = 1; | |
81 | ||
82 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", | |
83 | initrd_start, size); | |
84 | return; | |
85 | disable: | |
86 | printk(KERN_CONT " - disabling initrd\n"); | |
87 | initrd_start = 0; | |
88 | initrd_end = 0; | |
89 | } | |
90 | ||
91 | static void __init resource_init(void) | |
92 | { | |
93 | struct resource *res; | |
94 | ||
324f40fb CL |
95 | code_resource.start = __pa(&_text); |
96 | code_resource.end = __pa(&_etext) - 1; | |
97 | data_resource.start = __pa(&_etext); | |
98 | data_resource.end = __pa(&_edata) - 1; | |
6bc9a396 CL |
99 | |
100 | res = alloc_bootmem(sizeof(struct resource)); | |
101 | res->name = "System RAM"; | |
324f40fb CL |
102 | res->start = MEMORY_START; |
103 | res->end = MEMORY_START + MEMORY_SIZE - 1; | |
35d98e93 | 104 | res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; |
6bc9a396 CL |
105 | request_resource(&iomem_resource, res); |
106 | ||
107 | request_resource(res, &code_resource); | |
108 | request_resource(res, &data_resource); | |
109 | } | |
110 | ||
111 | void __init setup_arch(char **cmdline_p) | |
112 | { | |
113 | randomize_va_space = 0; | |
114 | *cmdline_p = command_line; | |
115 | ||
116 | cpu_cache_init(); | |
117 | tlb_init(); | |
118 | bootmem_init(); | |
119 | paging_init(); | |
120 | resource_init(); | |
121 | } | |
122 | ||
123 | static int show_cpuinfo(struct seq_file *m, void *v) | |
124 | { | |
125 | unsigned long n = (unsigned long) v - 1; | |
126 | ||
127 | seq_printf(m, "processor\t\t: %ld\n", n); | |
128 | seq_printf(m, "\n"); | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | static void *c_start(struct seq_file *m, loff_t *pos) | |
134 | { | |
135 | unsigned long i = *pos; | |
136 | ||
137 | return i < 1 ? (void *) (i + 1) : NULL; | |
138 | } | |
139 | ||
140 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
141 | { | |
142 | ++*pos; | |
143 | return c_start(m, pos); | |
144 | } | |
145 | ||
146 | static void c_stop(struct seq_file *m, void *v) | |
147 | { | |
148 | } | |
149 | ||
150 | const struct seq_operations cpuinfo_op = { | |
151 | .start = c_start, | |
152 | .next = c_next, | |
153 | .stop = c_stop, | |
154 | .show = show_cpuinfo, | |
155 | }; | |
156 | ||
157 | static int __init topology_init(void) | |
158 | { | |
159 | return 0; | |
160 | } | |
161 | ||
162 | subsys_initcall(topology_init); |