Pull address_range into release branch
[linux-2.6] / arch / m32r / kernel / setup.c
1 /*
2  *  linux/arch/m32r/kernel/setup.c
3  *
4  *  Setup routines for Renesas M32R
5  *
6  *  Copyright (c) 2001, 2002  Hiroyuki Kondo, Hirokazu Takata,
7  *                            Hitoshi Yamamoto
8  */
9
10 #include <linux/config.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/stddef.h>
14 #include <linux/fs.h>
15 #include <linux/sched.h>
16 #include <linux/ioport.h>
17 #include <linux/mm.h>
18 #include <linux/bootmem.h>
19 #include <linux/console.h>
20 #include <linux/initrd.h>
21 #include <linux/major.h>
22 #include <linux/root_dev.h>
23 #include <linux/seq_file.h>
24 #include <linux/timex.h>
25 #include <linux/tty.h>
26 #include <linux/cpu.h>
27 #include <linux/nodemask.h>
28 #include <linux/pfn.h>
29
30 #include <asm/processor.h>
31 #include <asm/pgtable.h>
32 #include <asm/io.h>
33 #include <asm/mmu_context.h>
34 #include <asm/m32r.h>
35 #include <asm/setup.h>
36 #include <asm/sections.h>
37
38 #ifdef CONFIG_MMU
39 extern void init_mmu(void);
40 #endif
41
42 extern char _end[];
43
44 /*
45  * Machine setup..
46  */
47 struct cpuinfo_m32r boot_cpu_data;
48
49 #ifdef CONFIG_BLK_DEV_RAM
50 extern int rd_doload;   /* 1 = load ramdisk, 0 = don't load */
51 extern int rd_prompt;   /* 1 = prompt for ramdisk, 0 = don't prompt */
52 extern int rd_image_start;      /* starting block # of image */
53 #endif
54
55 #if defined(CONFIG_VGA_CONSOLE)
56 struct screen_info screen_info = {
57         .orig_video_lines      = 25,
58         .orig_video_cols       = 80,
59         .orig_video_mode       = 0,
60         .orig_video_ega_bx     = 0,
61         .orig_video_isVGA      = 1,
62         .orig_video_points     = 8
63 };
64 #endif
65
66 extern int root_mountflags;
67
68 static char command_line[COMMAND_LINE_SIZE];
69
70 static struct resource data_resource = {
71         .name   = "Kernel data",
72         .start  = 0,
73         .end    = 0,
74         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
75 };
76
77 static struct resource code_resource = {
78         .name   = "Kernel code",
79         .start  = 0,
80         .end    = 0,
81         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
82 };
83
84 unsigned long memory_start;
85 unsigned long memory_end;
86
87 void __init setup_arch(char **);
88 int get_cpuinfo(char *);
89
90 static __inline__ void parse_mem_cmdline(char ** cmdline_p)
91 {
92         char c = ' ';
93         char *to = command_line;
94         char *from = COMMAND_LINE;
95         int len = 0;
96         int usermem = 0;
97
98         /* Save unparsed command line copy for /proc/cmdline */
99         memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
100         saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
101
102         memory_start = (unsigned long)CONFIG_MEMORY_START+PAGE_OFFSET;
103         memory_end = memory_start+(unsigned long)CONFIG_MEMORY_SIZE;
104
105         for ( ; ; ) {
106                 if (c == ' ' && !memcmp(from, "mem=", 4)) {
107                         if (to != command_line)
108                                 to--;
109
110                         {
111                                 unsigned long mem_size;
112
113                                 usermem = 1;
114                                 mem_size = memparse(from+4, &from);
115                                 memory_end = memory_start + mem_size;
116                         }
117                 }
118                 c = *(from++);
119                 if (!c)
120                         break;
121
122                 if (COMMAND_LINE_SIZE <= ++len)
123                         break;
124
125                 *(to++) = c;
126         }
127         *to = '\0';
128         *cmdline_p = command_line;
129         if (usermem)
130                 printk(KERN_INFO "user-defined physical RAM map:\n");
131 }
132
133 #ifndef CONFIG_DISCONTIGMEM
134 static unsigned long __init setup_memory(void)
135 {
136         unsigned long start_pfn, max_low_pfn, bootmap_size;
137
138         start_pfn = PFN_UP( __pa(_end) );
139         max_low_pfn = PFN_DOWN( __pa(memory_end) );
140
141         /*
142          * Initialize the boot-time allocator (with low memory only):
143          */
144         bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
145                 CONFIG_MEMORY_START>>PAGE_SHIFT, max_low_pfn);
146
147         /*
148          * Register fully available low RAM pages with the bootmem allocator.
149          */
150         {
151                 unsigned long curr_pfn;
152                 unsigned long last_pfn;
153                 unsigned long pages;
154
155                 /*
156                  * We are rounding up the start address of usable memory:
157                  */
158                 curr_pfn = PFN_UP(__pa(memory_start));
159
160                 /*
161                  * ... and at the end of the usable range downwards:
162                  */
163                 last_pfn = PFN_DOWN(__pa(memory_end));
164
165                 if (last_pfn > max_low_pfn)
166                         last_pfn = max_low_pfn;
167
168                 pages = last_pfn - curr_pfn;
169                 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
170         }
171
172         /*
173          * Reserve the kernel text and
174          * Reserve the bootmem bitmap. We do this in two steps (first step
175          * was init_bootmem()), because this catches the (definitely buggy)
176          * case of us accidentally initializing the bootmem allocator with
177          * an invalid RAM area.
178          */
179         reserve_bootmem(CONFIG_MEMORY_START + PAGE_SIZE,
180                 (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE - 1)
181                 - CONFIG_MEMORY_START);
182
183         /*
184          * reserve physical page 0 - it's a special BIOS page on many boxes,
185          * enabling clean reboots, SMP operation, laptop functions.
186          */
187         reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE);
188
189         /*
190          * reserve memory hole
191          */
192 #ifdef CONFIG_MEMHOLE
193         reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE);
194 #endif
195
196 #ifdef CONFIG_BLK_DEV_INITRD
197         if (LOADER_TYPE && INITRD_START) {
198                 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
199                         reserve_bootmem(INITRD_START, INITRD_SIZE);
200                         initrd_start = INITRD_START ?
201                                 INITRD_START + PAGE_OFFSET : 0;
202
203                         initrd_end = initrd_start + INITRD_SIZE;
204                         printk("initrd:start[%08lx],size[%08lx]\n",
205                                 initrd_start, INITRD_SIZE);
206                 } else {
207                         printk("initrd extends beyond end of memory "
208                                 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
209                                 INITRD_START + INITRD_SIZE,
210                                 max_low_pfn << PAGE_SHIFT);
211
212                         initrd_start = 0;
213                 }
214         }
215 #endif
216
217         return max_low_pfn;
218 }
219 #else   /* CONFIG_DISCONTIGMEM */
220 extern unsigned long setup_memory(void);
221 #endif  /* CONFIG_DISCONTIGMEM */
222
223 void __init setup_arch(char **cmdline_p)
224 {
225         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
226
227         boot_cpu_data.cpu_clock = M32R_CPUCLK;
228         boot_cpu_data.bus_clock = M32R_BUSCLK;
229         boot_cpu_data.timer_divide = M32R_TIMER_DIVIDE;
230
231 #ifdef CONFIG_BLK_DEV_RAM
232         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
233         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
234         rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
235 #endif
236
237         if (!MOUNT_ROOT_RDONLY)
238                 root_mountflags &= ~MS_RDONLY;
239
240 #ifdef CONFIG_VT
241 #if defined(CONFIG_VGA_CONSOLE)
242         conswitchp = &vga_con;
243 #elif defined(CONFIG_DUMMY_CONSOLE)
244         conswitchp = &dummy_con;
245 #endif
246 #endif
247
248 #ifdef CONFIG_DISCONTIGMEM
249         nodes_clear(node_online_map);
250         node_set_online(0);
251         node_set_online(1);
252 #endif  /* CONFIG_DISCONTIGMEM */
253
254         init_mm.start_code = (unsigned long) _text;
255         init_mm.end_code = (unsigned long) _etext;
256         init_mm.end_data = (unsigned long) _edata;
257         init_mm.brk = (unsigned long) _end;
258
259         code_resource.start = virt_to_phys(_text);
260         code_resource.end = virt_to_phys(_etext)-1;
261         data_resource.start = virt_to_phys(_etext);
262         data_resource.end = virt_to_phys(_edata)-1;
263
264         parse_mem_cmdline(cmdline_p);
265
266         setup_memory();
267
268         paging_init();
269 }
270
271 static struct cpu cpu_devices[NR_CPUS];
272
273 static int __init topology_init(void)
274 {
275         int i;
276
277         for_each_present_cpu(i)
278                 register_cpu(&cpu_devices[i], i, NULL);
279
280         return 0;
281 }
282
283 subsys_initcall(topology_init);
284
285 #ifdef CONFIG_PROC_FS
286 /*
287  *      Get CPU information for use by the procfs.
288  */
289 static int show_cpuinfo(struct seq_file *m, void *v)
290 {
291         struct cpuinfo_m32r *c = v;
292         unsigned long cpu = c - cpu_data;
293
294 #ifdef CONFIG_SMP
295         if (!cpu_online(cpu))
296                 return 0;
297 #endif  /* CONFIG_SMP */
298
299         seq_printf(m, "processor\t: %ld\n", cpu);
300
301 #if defined(CONFIG_CHIP_VDEC2)
302         seq_printf(m, "cpu family\t: VDEC2\n"
303                 "cache size\t: Unknown\n");
304 #elif defined(CONFIG_CHIP_M32700)
305         seq_printf(m,"cpu family\t: M32700\n"
306                 "cache size\t: I-8KB/D-8KB\n");
307 #elif defined(CONFIG_CHIP_M32102)
308         seq_printf(m,"cpu family\t: M32102\n"
309                 "cache size\t: I-8KB\n");
310 #elif defined(CONFIG_CHIP_OPSP)
311         seq_printf(m,"cpu family\t: OPSP\n"
312                 "cache size\t: I-8KB/D-8KB\n");
313 #elif defined(CONFIG_CHIP_MP)
314         seq_printf(m, "cpu family\t: M32R-MP\n"
315                 "cache size\t: I-xxKB/D-xxKB\n");
316 #elif  defined(CONFIG_CHIP_M32104)
317         seq_printf(m,"cpu family\t: M32104\n"
318                 "cache size\t: I-8KB/D-8KB\n");
319 #else
320         seq_printf(m, "cpu family\t: Unknown\n");
321 #endif
322         seq_printf(m, "bogomips\t: %lu.%02lu\n",
323                 c->loops_per_jiffy/(500000/HZ),
324                 (c->loops_per_jiffy/(5000/HZ)) % 100);
325 #if defined(CONFIG_PLAT_MAPPI)
326         seq_printf(m, "Machine\t\t: Mappi Evaluation board\n");
327 #elif defined(CONFIG_PLAT_MAPPI2)
328         seq_printf(m, "Machine\t\t: Mappi-II Evaluation board\n");
329 #elif defined(CONFIG_PLAT_MAPPI3)
330         seq_printf(m, "Machine\t\t: Mappi-III Evaluation board\n");
331 #elif defined(CONFIG_PLAT_M32700UT)
332         seq_printf(m, "Machine\t\t: M32700UT Evaluation board\n");
333 #elif defined(CONFIG_PLAT_OPSPUT)
334         seq_printf(m, "Machine\t\t: OPSPUT Evaluation board\n");
335 #elif defined(CONFIG_PLAT_USRV)
336         seq_printf(m, "Machine\t\t: uServer\n");
337 #elif defined(CONFIG_PLAT_OAKS32R)
338         seq_printf(m, "Machine\t\t: OAKS32R\n");
339 #elif  defined(CONFIG_PLAT_M32104UT)
340         seq_printf(m, "Machine\t\t: M3T-M32104UT uT Engine board\n");
341 #else
342         seq_printf(m, "Machine\t\t: Unknown\n");
343 #endif
344
345 #define PRINT_CLOCK(name, value)                                \
346         seq_printf(m, name " clock\t: %d.%02dMHz\n",            \
347                 ((value) / 1000000), ((value) % 1000000)/10000)
348
349         PRINT_CLOCK("CPU", (int)c->cpu_clock);
350         PRINT_CLOCK("Bus", (int)c->bus_clock);
351
352         seq_printf(m, "\n");
353
354         return 0;
355 }
356
357 static void *c_start(struct seq_file *m, loff_t *pos)
358 {
359         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
360 }
361
362 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
363 {
364         ++*pos;
365         return c_start(m, pos);
366 }
367
368 static void c_stop(struct seq_file *m, void *v)
369 {
370 }
371
372 struct seq_operations cpuinfo_op = {
373         start:  c_start,
374         next:   c_next,
375         stop:   c_stop,
376         show:   show_cpuinfo,
377 };
378 #endif  /* CONFIG_PROC_FS */
379
380 unsigned long cpu_initialized __initdata = 0;
381
382 /*
383  * cpu_init() initializes state that is per-CPU. Some data is already
384  * initialized (naturally) in the bootstrap process.
385  * We reload them nevertheless, this function acts as a
386  * 'CPU state barrier', nothing should get across.
387  */
388 #if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2)    \
389         || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \
390         || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)
391 void __init cpu_init (void)
392 {
393         int cpu_id = smp_processor_id();
394
395         if (test_and_set_bit(cpu_id, &cpu_initialized)) {
396                 printk(KERN_WARNING "CPU#%d already initialized!\n", cpu_id);
397                 for ( ; ; )
398                         local_irq_enable();
399         }
400         printk(KERN_INFO "Initializing CPU#%d\n", cpu_id);
401
402         /* Set up and load the per-CPU TSS and LDT */
403         atomic_inc(&init_mm.mm_count);
404         current->active_mm = &init_mm;
405         if (current->mm)
406                 BUG();
407
408         /* Force FPU initialization */
409         current_thread_info()->status = 0;
410         clear_used_math();
411
412 #ifdef CONFIG_MMU
413         /* Set up MMU */
414         init_mmu();
415 #endif
416
417         /* Set up ICUIMASK */
418         outl(0x00070000, M32R_ICU_IMASK_PORTL);         /* imask=111 */
419 }
420 #endif  /* defined(CONFIG_CHIP_VDEC2) ... */