sh64: arch/sh64/kernel/setup.c: duplicate include removal.
[sfrench/cifs-2.6.git] / arch / sh64 / kernel / setup.c
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * arch/sh64/kernel/setup.c
7  *
8  * sh64 Arch Support
9  *
10  * This file handles the architecture-dependent parts of initialization
11  *
12  * Copyright (C) 2000, 2001  Paolo Alberelli
13  * Copyright (C) 2003, 2004  Paul Mundt
14  *
15  * benedict.gaster@superh.com:   2nd May 2002
16  *    Modified to use the empty_zero_page to pass command line arguments.
17  *
18  * benedict.gaster@superh.com:   3rd May 2002
19  *    Added support for ramdisk, removing statically linked romfs at the same time.
20  *
21  * lethal@linux-sh.org:          15th May 2003
22  *    Added generic procfs cpuinfo reporting. Make boards just export their name.
23  *
24  * lethal@linux-sh.org:          25th May 2003
25  *    Added generic get_cpu_subtype() for subtype reporting from cpu_data->type.
26  *
27  */
28 #include <linux/errno.h>
29 #include <linux/rwsem.h>
30 #include <linux/sched.h>
31 #include <linux/kernel.h>
32 #include <linux/mm.h>
33 #include <linux/stddef.h>
34 #include <linux/unistd.h>
35 #include <linux/ptrace.h>
36 #include <linux/slab.h>
37 #include <linux/user.h>
38 #include <linux/a.out.h>
39 #include <linux/screen_info.h>
40 #include <linux/ioport.h>
41 #include <linux/delay.h>
42 #include <linux/init.h>
43 #include <linux/seq_file.h>
44 #include <linux/blkdev.h>
45 #include <linux/bootmem.h>
46 #include <linux/console.h>
47 #include <linux/root_dev.h>
48 #include <linux/cpu.h>
49 #include <linux/initrd.h>
50 #include <linux/pfn.h>
51 #include <asm/processor.h>
52 #include <asm/page.h>
53 #include <asm/pgtable.h>
54 #include <asm/platform.h>
55 #include <asm/uaccess.h>
56 #include <asm/system.h>
57 #include <asm/io.h>
58 #include <asm/sections.h>
59 #include <asm/setup.h>
60 #include <asm/smp.h>
61
62 struct screen_info screen_info;
63
64 #ifdef CONFIG_BLK_DEV_RAM
65 extern int rd_doload;           /* 1 = load ramdisk, 0 = don't load */
66 extern int rd_prompt;           /* 1 = prompt for ramdisk, 0 = don't prompt */
67 extern int rd_image_start;      /* starting block # of image */
68 #endif
69
70 extern int root_mountflags;
71 extern char *get_system_type(void);
72 extern void platform_setup(void);
73 extern void platform_monitor(void);
74 extern void platform_reserve(void);
75 extern int sh64_cache_init(void);
76 extern int sh64_tlb_init(void);
77
78 #define RAMDISK_IMAGE_START_MASK        0x07FF
79 #define RAMDISK_PROMPT_FLAG             0x8000
80 #define RAMDISK_LOAD_FLAG               0x4000
81
82 static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
83 unsigned long long memory_start = CONFIG_MEMORY_START;
84 unsigned long long memory_end = CONFIG_MEMORY_START + (CONFIG_MEMORY_SIZE_IN_MB * 1024 * 1024);
85
86 struct sh_cpuinfo boot_cpu_data;
87
88 static inline void parse_mem_cmdline (char ** cmdline_p)
89 {
90         char c = ' ', *to = command_line, *from = COMMAND_LINE;
91         int len = 0;
92
93         /* Save unparsed command line copy for /proc/cmdline */
94         memcpy(boot_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
95         boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
96
97         for (;;) {
98           /*
99            * "mem=XXX[kKmM]" defines a size of memory.
100            */
101                 if (c == ' ' && !memcmp(from, "mem=", 4)) {
102                       if (to != command_line)
103                         to--;
104                       {
105                         unsigned long mem_size;
106
107                         mem_size = memparse(from+4, &from);
108                         memory_end = memory_start + mem_size;
109                       }
110                 }
111                 c = *(from++);
112                 if (!c)
113                   break;
114                 if (COMMAND_LINE_SIZE <= ++len)
115                   break;
116                 *(to++) = c;
117         }
118         *to = '\0';
119
120         *cmdline_p = command_line;
121 }
122
123 static void __init sh64_cpu_type_detect(void)
124 {
125         extern unsigned long long peek_real_address_q(unsigned long long addr);
126         unsigned long long cir;
127         /* Do peeks in real mode to avoid having to set up a mapping for the
128            WPC registers.  On SH5-101 cut2, such a mapping would be exposed to
129            an address translation erratum which would make it hard to set up
130            correctly. */
131         cir = peek_real_address_q(0x0d000008);
132
133         if ((cir & 0xffff) == 0x5103) {
134                 boot_cpu_data.type = CPU_SH5_103;
135         } else if (((cir >> 32) & 0xffff) == 0x51e2) {
136                 /* CPU.VCR aliased at CIR address on SH5-101 */
137                 boot_cpu_data.type = CPU_SH5_101;
138         } else {
139                 boot_cpu_data.type = CPU_SH_NONE;
140         }
141 }
142
143 void __init setup_arch(char **cmdline_p)
144 {
145         unsigned long bootmap_size, i;
146         unsigned long first_pfn, start_pfn, last_pfn, pages;
147
148 #ifdef CONFIG_EARLY_PRINTK
149         extern void enable_early_printk(void);
150
151         /*
152          * Setup Early SCIF console
153          */
154         enable_early_printk();
155 #endif
156
157         /*
158          * Setup TLB mappings
159          */
160         sh64_tlb_init();
161
162         /*
163          * Caches are already initialized by the time we get here, so we just
164          * fill in cpu_data info for the caches.
165          */
166         sh64_cache_init();
167
168         platform_setup();
169         platform_monitor();
170
171         sh64_cpu_type_detect();
172
173         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
174
175 #ifdef CONFIG_BLK_DEV_RAM
176         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
177         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
178         rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
179 #endif
180
181         if (!MOUNT_ROOT_RDONLY)
182                 root_mountflags &= ~MS_RDONLY;
183         init_mm.start_code = (unsigned long) _text;
184         init_mm.end_code = (unsigned long) _etext;
185         init_mm.end_data = (unsigned long) _edata;
186         init_mm.brk = (unsigned long) _end;
187
188         code_resource.start = __pa(_text);
189         code_resource.end = __pa(_etext)-1;
190         data_resource.start = __pa(_etext);
191         data_resource.end = __pa(_edata)-1;
192
193         parse_mem_cmdline(cmdline_p);
194
195         /*
196          * Find the lowest and highest page frame numbers we have available
197          */
198         first_pfn = PFN_DOWN(memory_start);
199         last_pfn = PFN_DOWN(memory_end);
200         pages = last_pfn - first_pfn;
201
202         /*
203          * Partially used pages are not usable - thus
204          * we are rounding upwards:
205          */
206         start_pfn = PFN_UP(__pa(_end));
207
208         /*
209          * Find a proper area for the bootmem bitmap. After this
210          * bootstrap step all allocations (until the page allocator
211          * is intact) must be done via bootmem_alloc().
212          */
213         bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
214                                          first_pfn,
215                                          last_pfn);
216         /*
217          * Round it up.
218          */
219         bootmap_size = PFN_PHYS(PFN_UP(bootmap_size));
220
221         /*
222          * Register fully available RAM pages with the bootmem allocator.
223          */
224         free_bootmem_node(NODE_DATA(0), PFN_PHYS(first_pfn), PFN_PHYS(pages));
225
226         /*
227          * Reserve all kernel sections + bootmem bitmap + a guard page.
228          */
229         reserve_bootmem_node(NODE_DATA(0), PFN_PHYS(first_pfn),
230                         (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE) - PFN_PHYS(first_pfn));
231
232         /*
233          * Reserve platform dependent sections
234          */
235         platform_reserve();
236
237 #ifdef CONFIG_BLK_DEV_INITRD
238         if (LOADER_TYPE && INITRD_START) {
239                 if (INITRD_START + INITRD_SIZE <= (PFN_PHYS(last_pfn))) {
240                         reserve_bootmem_node(NODE_DATA(0), INITRD_START + __MEMORY_START, INITRD_SIZE);
241
242                         initrd_start = (long) INITRD_START + PAGE_OFFSET + __MEMORY_START;
243                         initrd_end = initrd_start + INITRD_SIZE;
244                 } else {
245                         printk("initrd extends beyond end of memory "
246                             "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
247                                     (long) INITRD_START + INITRD_SIZE,
248                                     PFN_PHYS(last_pfn));
249                         initrd_start = 0;
250                 }
251         }
252 #endif
253
254         /*
255          * Claim all RAM, ROM, and I/O resources.
256          */
257
258         /* Kernel RAM */
259         request_resource(&iomem_resource, &code_resource);
260         request_resource(&iomem_resource, &data_resource);
261
262         /* Other KRAM space */
263         for (i = 0; i < STANDARD_KRAM_RESOURCES - 2; i++)
264                 request_resource(&iomem_resource,
265                                  &platform_parms.kram_res_p[i]);
266
267         /* XRAM space */
268         for (i = 0; i < STANDARD_XRAM_RESOURCES; i++)
269                 request_resource(&iomem_resource,
270                                  &platform_parms.xram_res_p[i]);
271
272         /* ROM space */
273         for (i = 0; i < STANDARD_ROM_RESOURCES; i++)
274                 request_resource(&iomem_resource,
275                                  &platform_parms.rom_res_p[i]);
276
277         /* I/O space */
278         for (i = 0; i < STANDARD_IO_RESOURCES; i++)
279                 request_resource(&ioport_resource,
280                                  &platform_parms.io_res_p[i]);
281
282
283 #ifdef CONFIG_VT
284 #if defined(CONFIG_VGA_CONSOLE)
285         conswitchp = &vga_con;
286 #elif defined(CONFIG_DUMMY_CONSOLE)
287         conswitchp = &dummy_con;
288 #endif
289 #endif
290
291         printk("Hardware FPU: %s\n", fpu_in_use ? "enabled" : "disabled");
292
293         paging_init();
294 }
295
296 void __xchg_called_with_bad_pointer(void)
297 {
298         printk(KERN_EMERG "xchg() called with bad pointer !\n");
299 }
300
301 static struct cpu cpu[1];
302
303 static int __init topology_init(void)
304 {
305         return register_cpu(cpu, 0);
306 }
307
308 subsys_initcall(topology_init);
309
310 /*
311  *      Get CPU information
312  */
313 static const char *cpu_name[] = {
314         [CPU_SH5_101]   = "SH5-101",
315         [CPU_SH5_103]   = "SH5-103",
316         [CPU_SH_NONE]   = "Unknown",
317 };
318
319 const char *get_cpu_subtype(void)
320 {
321         return cpu_name[boot_cpu_data.type];
322 }
323
324 #ifdef CONFIG_PROC_FS
325 static int show_cpuinfo(struct seq_file *m,void *v)
326 {
327         unsigned int cpu = smp_processor_id();
328
329         if (!cpu)
330                 seq_printf(m, "machine\t\t: %s\n", get_system_type());
331
332         seq_printf(m, "processor\t: %d\n", cpu);
333         seq_printf(m, "cpu family\t: SH-5\n");
334         seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype());
335
336         seq_printf(m, "icache size\t: %dK-bytes\n",
337                    (boot_cpu_data.icache.ways *
338                     boot_cpu_data.icache.sets *
339                     boot_cpu_data.icache.linesz) >> 10);
340         seq_printf(m, "dcache size\t: %dK-bytes\n",
341                    (boot_cpu_data.dcache.ways *
342                     boot_cpu_data.dcache.sets *
343                     boot_cpu_data.dcache.linesz) >> 10);
344         seq_printf(m, "itlb entries\t: %d\n", boot_cpu_data.itlb.entries);
345         seq_printf(m, "dtlb entries\t: %d\n", boot_cpu_data.dtlb.entries);
346
347 #define PRINT_CLOCK(name, value) \
348         seq_printf(m, name " clock\t: %d.%02dMHz\n", \
349                      ((value) / 1000000), ((value) % 1000000)/10000)
350
351         PRINT_CLOCK("cpu", boot_cpu_data.cpu_clock);
352         PRINT_CLOCK("bus", boot_cpu_data.bus_clock);
353         PRINT_CLOCK("module", boot_cpu_data.module_clock);
354
355         seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
356                      (loops_per_jiffy*HZ+2500)/500000,
357                      ((loops_per_jiffy*HZ+2500)/5000) % 100);
358
359         return 0;
360 }
361
362 static void *c_start(struct seq_file *m, loff_t *pos)
363 {
364         return (void*)(*pos == 0);
365 }
366 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
367 {
368         return NULL;
369 }
370 static void c_stop(struct seq_file *m, void *v)
371 {
372 }
373 struct seq_operations cpuinfo_op = {
374         .start  = c_start,
375         .next   = c_next,
376         .stop   = c_stop,
377         .show   = show_cpuinfo,
378 };
379 #endif /* CONFIG_PROC_FS */