MN10300: Change "Matsushita" to "Panasonic".
[linux-3.10.git] / arch / mn10300 / kernel / setup.c
1 /* MN10300 Arch-specific initialisation
2  *
3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4  * Written by David Howells (dhowells@redhat.com)
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public Licence
8  * as published by the Free Software Foundation; either version
9  * 2 of the Licence, or (at your option) any later version.
10  */
11 #include <linux/errno.h>
12 #include <linux/sched.h>
13 #include <linux/kernel.h>
14 #include <linux/mm.h>
15 #include <linux/stddef.h>
16 #include <linux/unistd.h>
17 #include <linux/ptrace.h>
18 #include <linux/user.h>
19 #include <linux/tty.h>
20 #include <linux/ioport.h>
21 #include <linux/delay.h>
22 #include <linux/init.h>
23 #include <linux/bootmem.h>
24 #include <linux/seq_file.h>
25 #include <linux/cpu.h>
26 #include <asm/processor.h>
27 #include <linux/console.h>
28 #include <asm/uaccess.h>
29 #include <asm/system.h>
30 #include <asm/setup.h>
31 #include <asm/io.h>
32 #include <asm/smp.h>
33 #include <proc/proc.h>
34 #include <asm/fpu.h>
35 #include <asm/sections.h>
36
37 struct mn10300_cpuinfo boot_cpu_data;
38
39 /* For PCI or other memory-mapped resources */
40 unsigned long pci_mem_start = 0x18000000;
41
42 char redboot_command_line[COMMAND_LINE_SIZE] =
43         "console=ttyS0,115200 root=/dev/mtdblock3 rw";
44
45 char __initdata redboot_platform_name[COMMAND_LINE_SIZE];
46
47 static struct resource code_resource = {
48         .start  = 0x100000,
49         .end    = 0,
50         .name   = "Kernel code",
51 };
52
53 static struct resource data_resource = {
54         .start  = 0,
55         .end    = 0,
56         .name   = "Kernel data",
57 };
58
59 static unsigned long __initdata phys_memory_base;
60 static unsigned long __initdata phys_memory_end;
61 static unsigned long __initdata memory_end;
62 unsigned long memory_size;
63
64 struct thread_info *__current_ti = &init_thread_union.thread_info;
65 struct task_struct *__current = &init_task;
66
67 #define mn10300_known_cpus 5
68 static const char *const mn10300_cputypes[] = {
69         "am33-1",
70         "am33-2",
71         "am34-1",
72         "am33-3",
73         "am34-2",
74         "unknown"
75 };
76
77 /*
78  *
79  */
80 static void __init parse_mem_cmdline(char **cmdline_p)
81 {
82         char *from, *to, c;
83
84         /* save unparsed command line copy for /proc/cmdline */
85         strcpy(boot_command_line, redboot_command_line);
86
87         /* see if there's an explicit memory size option */
88         from = redboot_command_line;
89         to = redboot_command_line;
90         c = ' ';
91
92         for (;;) {
93                 if (c == ' ' && !memcmp(from, "mem=", 4)) {
94                         if (to != redboot_command_line)
95                                 to--;
96                         memory_size = memparse(from + 4, &from);
97                 }
98
99                 c = *(from++);
100                 if (!c)
101                         break;
102
103                 *(to++) = c;
104         }
105
106         *to = '\0';
107         *cmdline_p = redboot_command_line;
108
109         if (memory_size == 0)
110                 panic("Memory size not known\n");
111
112         memory_end = (unsigned long) CONFIG_KERNEL_RAM_BASE_ADDRESS +
113                 memory_size;
114         if (memory_end > phys_memory_end)
115                 memory_end = phys_memory_end;
116 }
117
118 /*
119  * architecture specific setup
120  */
121 void __init setup_arch(char **cmdline_p)
122 {
123         unsigned long bootmap_size;
124         unsigned long kstart_pfn, start_pfn, free_pfn, end_pfn;
125
126         cpu_init();
127         unit_setup();
128         smp_init_cpus();
129         parse_mem_cmdline(cmdline_p);
130
131         init_mm.start_code = (unsigned long)&_text;
132         init_mm.end_code = (unsigned long) &_etext;
133         init_mm.end_data = (unsigned long) &_edata;
134         init_mm.brk = (unsigned long) &_end;
135
136         code_resource.start = virt_to_bus(&_text);
137         code_resource.end = virt_to_bus(&_etext)-1;
138         data_resource.start = virt_to_bus(&_etext);
139         data_resource.end = virt_to_bus(&_edata)-1;
140
141         start_pfn = (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT);
142         kstart_pfn = PFN_UP(__pa(&_text));
143         free_pfn = PFN_UP(__pa(&_end));
144         end_pfn = PFN_DOWN(__pa(memory_end));
145
146         bootmap_size = init_bootmem_node(&contig_page_data,
147                                          free_pfn,
148                                          start_pfn,
149                                          end_pfn);
150
151         if (kstart_pfn > start_pfn)
152                 free_bootmem(PFN_PHYS(start_pfn),
153                              PFN_PHYS(kstart_pfn - start_pfn));
154
155         free_bootmem(PFN_PHYS(free_pfn),
156                      PFN_PHYS(end_pfn - free_pfn));
157
158         /* If interrupt vector table is in main ram, then we need to
159            reserve the page it is occupying. */
160         if (CONFIG_INTERRUPT_VECTOR_BASE >= CONFIG_KERNEL_RAM_BASE_ADDRESS &&
161             CONFIG_INTERRUPT_VECTOR_BASE < memory_end)
162                 reserve_bootmem(CONFIG_INTERRUPT_VECTOR_BASE, PAGE_SIZE,
163                                 BOOTMEM_DEFAULT);
164
165         reserve_bootmem(PAGE_ALIGN(PFN_PHYS(free_pfn)), bootmap_size,
166                         BOOTMEM_DEFAULT);
167
168 #ifdef CONFIG_VT
169 #if defined(CONFIG_VGA_CONSOLE)
170         conswitchp = &vga_con;
171 #elif defined(CONFIG_DUMMY_CONSOLE)
172         conswitchp = &dummy_con;
173 #endif
174 #endif
175
176         paging_init();
177 }
178
179 /*
180  * perform CPU initialisation
181  */
182 void __init cpu_init(void)
183 {
184         unsigned long cpurev = CPUREV, type;
185
186         type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S;
187         if (type > mn10300_known_cpus)
188                 type = mn10300_known_cpus;
189
190         printk(KERN_INFO "Panasonic %s, rev %ld\n",
191                mn10300_cputypes[type],
192                (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S);
193
194         get_mem_info(&phys_memory_base, &memory_size);
195         phys_memory_end = phys_memory_base + memory_size;
196
197         fpu_init_state();
198 }
199
200 static struct cpu cpu_devices[NR_CPUS];
201
202 static int __init topology_init(void)
203 {
204         int i;
205
206         for_each_present_cpu(i)
207                 register_cpu(&cpu_devices[i], i);
208
209         return 0;
210 }
211
212 subsys_initcall(topology_init);
213
214 /*
215  * Get CPU information for use by the procfs.
216  */
217 static int show_cpuinfo(struct seq_file *m, void *v)
218 {
219 #ifdef CONFIG_SMP
220         struct mn10300_cpuinfo *c = v;
221         unsigned long cpu_id = c - cpu_data;
222         unsigned long cpurev = c->type, type, icachesz, dcachesz;
223 #else  /* CONFIG_SMP */
224         unsigned long cpu_id = 0;
225         unsigned long cpurev = CPUREV, type, icachesz, dcachesz;
226 #endif /* CONFIG_SMP */
227
228 #ifdef CONFIG_SMP
229         if (!cpu_online(cpu_id))
230                 return 0;
231 #endif
232
233         type = (cpurev & CPUREV_TYPE) >> CPUREV_TYPE_S;
234         if (type > mn10300_known_cpus)
235                 type = mn10300_known_cpus;
236
237         icachesz =
238                 ((cpurev & CPUREV_ICWAY ) >> CPUREV_ICWAY_S)  *
239                 ((cpurev & CPUREV_ICSIZE) >> CPUREV_ICSIZE_S) *
240                 1024;
241
242         dcachesz =
243                 ((cpurev & CPUREV_DCWAY ) >> CPUREV_DCWAY_S)  *
244                 ((cpurev & CPUREV_DCSIZE) >> CPUREV_DCSIZE_S) *
245                 1024;
246
247         seq_printf(m,
248                    "processor  : %ld\n"
249                    "vendor_id  : " PROCESSOR_VENDOR_NAME "\n"
250                    "cpu core   : %s\n"
251                    "cpu rev    : %lu\n"
252                    "model name : " PROCESSOR_MODEL_NAME         "\n"
253                    "icache size: %lu\n"
254                    "dcache size: %lu\n",
255                    cpu_id,
256                    mn10300_cputypes[type],
257                    (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S,
258                    icachesz,
259                    dcachesz
260                    );
261
262         seq_printf(m,
263                    "ioclk speed: %lu.%02luMHz\n"
264                    "bogomips   : %lu.%02lu\n\n",
265                    MN10300_IOCLK / 1000000,
266                    (MN10300_IOCLK / 10000) % 100,
267 #ifdef CONFIG_SMP
268                    c->loops_per_jiffy / (500000 / HZ),
269                    (c->loops_per_jiffy / (5000 / HZ)) % 100
270 #else  /* CONFIG_SMP */
271                    loops_per_jiffy / (500000 / HZ),
272                    (loops_per_jiffy / (5000 / HZ)) % 100
273 #endif /* CONFIG_SMP */
274                    );
275
276         return 0;
277 }
278
279 static void *c_start(struct seq_file *m, loff_t *pos)
280 {
281         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
282 }
283
284 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
285 {
286         ++*pos;
287         return c_start(m, pos);
288 }
289
290 static void c_stop(struct seq_file *m, void *v)
291 {
292 }
293
294 const struct seq_operations cpuinfo_op = {
295         .start  = c_start,
296         .next   = c_next,
297         .stop   = c_stop,
298         .show   = show_cpuinfo,
299 };