Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6] / 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/slab.h>
19 #include <linux/user.h>
20 #include <linux/tty.h>
21 #include <linux/ioport.h>
22 #include <linux/delay.h>
23 #include <linux/init.h>
24 #include <linux/bootmem.h>
25 #include <linux/seq_file.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/busctl-regs.h>
35 #include <asm/fpu.h>
36 #include <asm/sections.h>
37
38 struct mn10300_cpuinfo boot_cpu_data;
39
40 /* For PCI or other memory-mapped resources */
41 unsigned long pci_mem_start = 0x18000000;
42
43 char redboot_command_line[COMMAND_LINE_SIZE] =
44         "console=ttyS0,115200 root=/dev/mtdblock3 rw";
45
46 char __initdata redboot_platform_name[COMMAND_LINE_SIZE];
47
48 static struct resource code_resource = {
49         .start  = 0x100000,
50         .end    = 0,
51         .name   = "Kernel code",
52 };
53
54 static struct resource data_resource = {
55         .start  = 0,
56         .end    = 0,
57         .name   = "Kernel data",
58 };
59
60 static unsigned long __initdata phys_memory_base;
61 static unsigned long __initdata phys_memory_end;
62 static unsigned long __initdata memory_end;
63 unsigned long memory_size;
64
65 struct thread_info *__current_ti = &init_thread_union.thread_info;
66 struct task_struct *__current = &init_task;
67
68 #define mn10300_known_cpus 3
69 static const char *const mn10300_cputypes[] = {
70         "am33v1",
71         "am33v2",
72         "am34v1",
73         "unknown"
74 };
75
76 /*
77  *
78  */
79 static void __init parse_mem_cmdline(char **cmdline_p)
80 {
81         char *from, *to, c;
82
83         /* save unparsed command line copy for /proc/cmdline */
84         strcpy(boot_command_line, redboot_command_line);
85
86         /* see if there's an explicit memory size option */
87         from = redboot_command_line;
88         to = redboot_command_line;
89         c = ' ';
90
91         for (;;) {
92                 if (c == ' ' && !memcmp(from, "mem=", 4)) {
93                         if (to != redboot_command_line)
94                                 to--;
95                         memory_size = memparse(from + 4, &from);
96                 }
97
98                 c = *(from++);
99                 if (!c)
100                         break;
101
102                 *(to++) = c;
103         }
104
105         *to = '\0';
106         *cmdline_p = redboot_command_line;
107
108         if (memory_size == 0)
109                 panic("Memory size not known\n");
110
111         memory_end = (unsigned long) CONFIG_KERNEL_RAM_BASE_ADDRESS +
112                 memory_size;
113         if (memory_end > phys_memory_end)
114                 memory_end = phys_memory_end;
115 }
116
117 /*
118  * architecture specific setup
119  */
120 void __init setup_arch(char **cmdline_p)
121 {
122         unsigned long bootmap_size;
123         unsigned long kstart_pfn, start_pfn, free_pfn, end_pfn;
124
125         cpu_init();
126         unit_setup();
127         parse_mem_cmdline(cmdline_p);
128
129         init_mm.start_code = (unsigned long)&_text;
130         init_mm.end_code = (unsigned long) &_etext;
131         init_mm.end_data = (unsigned long) &_edata;
132         init_mm.brk = (unsigned long) &_end;
133
134         code_resource.start = virt_to_bus(&_text);
135         code_resource.end = virt_to_bus(&_etext)-1;
136         data_resource.start = virt_to_bus(&_etext);
137         data_resource.end = virt_to_bus(&_edata)-1;
138
139         start_pfn = (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT);
140         kstart_pfn = PFN_UP(__pa(&_text));
141         free_pfn = PFN_UP(__pa(&_end));
142         end_pfn = PFN_DOWN(__pa(memory_end));
143
144         bootmap_size = init_bootmem_node(&contig_page_data,
145                                          free_pfn,
146                                          start_pfn,
147                                          end_pfn);
148
149         if (kstart_pfn > start_pfn)
150                 free_bootmem(PFN_PHYS(start_pfn),
151                              PFN_PHYS(kstart_pfn - start_pfn));
152
153         free_bootmem(PFN_PHYS(free_pfn),
154                      PFN_PHYS(end_pfn - free_pfn));
155
156         /* If interrupt vector table is in main ram, then we need to
157            reserve the page it is occupying. */
158         if (CONFIG_INTERRUPT_VECTOR_BASE >= CONFIG_KERNEL_RAM_BASE_ADDRESS &&
159             CONFIG_INTERRUPT_VECTOR_BASE < memory_end)
160                 reserve_bootmem(CONFIG_INTERRUPT_VECTOR_BASE, PAGE_SIZE,
161                                 BOOTMEM_DEFAULT);
162
163         reserve_bootmem(PAGE_ALIGN(PFN_PHYS(free_pfn)), bootmap_size,
164                         BOOTMEM_DEFAULT);
165
166 #ifdef CONFIG_VT
167 #if defined(CONFIG_VGA_CONSOLE)
168         conswitchp = &vga_con;
169 #elif defined(CONFIG_DUMMY_CONSOLE)
170         conswitchp = &dummy_con;
171 #endif
172 #endif
173
174         paging_init();
175 }
176
177 /*
178  * perform CPU initialisation
179  */
180 void __init cpu_init(void)
181 {
182         unsigned long cpurev = CPUREV, type;
183         unsigned long base, size;
184
185         type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S;
186         if (type > mn10300_known_cpus)
187                 type = mn10300_known_cpus;
188
189         printk(KERN_INFO "Matsushita %s, rev %ld\n",
190                mn10300_cputypes[type],
191                (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S);
192
193         /* determine the memory size and base from the memory controller regs */
194         memory_size = 0;
195
196         base = SDBASE(0);
197         if (base & SDBASE_CE) {
198                 size = (base & SDBASE_CBAM) << SDBASE_CBAM_SHIFT;
199                 size = ~size + 1;
200                 base &= SDBASE_CBA;
201
202                 printk(KERN_INFO "SDRAM[0]: %luMb @%08lx\n", size >> 20, base);
203                 memory_size += size;
204                 phys_memory_base = base;
205         }
206
207         base = SDBASE(1);
208         if (base & SDBASE_CE) {
209                 size = (base & SDBASE_CBAM) << SDBASE_CBAM_SHIFT;
210                 size = ~size + 1;
211                 base &= SDBASE_CBA;
212
213                 printk(KERN_INFO "SDRAM[1]: %luMb @%08lx\n", size >> 20, base);
214                 memory_size += size;
215                 if (phys_memory_base == 0)
216                         phys_memory_base = base;
217         }
218
219         phys_memory_end = phys_memory_base + memory_size;
220
221 #ifdef CONFIG_FPU
222         fpu_init_state();
223 #endif
224 }
225
226 /*
227  * Get CPU information for use by the procfs.
228  */
229 static int show_cpuinfo(struct seq_file *m, void *v)
230 {
231         unsigned long cpurev = CPUREV, type, icachesz, dcachesz;
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  : 0\n"
249                    "vendor_id  : Matsushita\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                    mn10300_cputypes[type],
256                    (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S,
257                    icachesz,
258                    dcachesz
259                    );
260
261         seq_printf(m,
262                    "ioclk speed: %lu.%02luMHz\n"
263                    "bogomips   : %lu.%02lu\n\n",
264                    MN10300_IOCLK / 1000000,
265                    (MN10300_IOCLK / 10000) % 100,
266                    loops_per_jiffy / (500000 / HZ),
267                    (loops_per_jiffy / (5000 / HZ)) % 100
268                    );
269
270         return 0;
271 }
272
273 static void *c_start(struct seq_file *m, loff_t *pos)
274 {
275         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
276 }
277
278 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
279 {
280         ++*pos;
281         return c_start(m, pos);
282 }
283
284 static void c_stop(struct seq_file *m, void *v)
285 {
286 }
287
288 struct seq_operations cpuinfo_op = {
289         .start  = c_start,
290         .next   = c_next,
291         .stop   = c_stop,
292         .show   = show_cpuinfo,
293 };