[PATCH] drive_info removal outside of arch/i386
[linux-2.6.git] / 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/stddef.h>
13 #include <linux/fs.h>
14 #include <linux/sched.h>
15 #include <linux/ioport.h>
16 #include <linux/mm.h>
17 #include <linux/bootmem.h>
18 #include <linux/console.h>
19 #include <linux/initrd.h>
20 #include <linux/major.h>
21 #include <linux/root_dev.h>
22 #include <linux/seq_file.h>
23 #include <linux/timex.h>
24 #include <linux/tty.h>
25 #include <linux/cpu.h>
26 #include <linux/nodemask.h>
27
28 #include <asm/processor.h>
29 #include <asm/pgtable.h>
30 #include <asm/io.h>
31 #include <asm/mmu_context.h>
32 #include <asm/m32r.h>
33 #include <asm/setup.h>
34 #include <asm/sections.h>
35
36 #ifdef CONFIG_MMU
37 extern void init_mmu(void);
38 #endif
39
40 extern char _end[];
41
42 /*
43  * Machine setup..
44  */
45 struct cpuinfo_m32r boot_cpu_data;
46
47 #ifdef CONFIG_BLK_DEV_RAM
48 extern int rd_doload;   /* 1 = load ramdisk, 0 = don't load */
49 extern int rd_prompt;   /* 1 = prompt for ramdisk, 0 = don't prompt */
50 extern int rd_image_start;      /* starting block # of image */
51 #endif
52
53 #if defined(CONFIG_VGA_CONSOLE)
54 struct screen_info screen_info = {
55         .orig_video_lines      = 25,
56         .orig_video_cols       = 80,
57         .orig_video_mode       = 0,
58         .orig_video_ega_bx     = 0,
59         .orig_video_isVGA      = 1,
60         .orig_video_points     = 8
61 };
62 #endif
63
64 extern int root_mountflags;
65
66 static char command_line[COMMAND_LINE_SIZE];
67
68 static struct resource data_resource = {
69         .name   = "Kernel data",
70         .start  = 0,
71         .end    = 0,
72         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
73 };
74
75 static struct resource code_resource = {
76         .name   = "Kernel code",
77         .start  = 0,
78         .end    = 0,
79         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
80 };
81
82 unsigned long memory_start;
83 unsigned long memory_end;
84
85 void __init setup_arch(char **);
86 int get_cpuinfo(char *);
87
88 static __inline__ void parse_mem_cmdline(char ** cmdline_p)
89 {
90         char c = ' ';
91         char *to = command_line;
92         char *from = COMMAND_LINE;
93         int len = 0;
94         int usermem = 0;
95
96         /* Save unparsed command line copy for /proc/cmdline */
97         memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
98         saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
99
100         memory_start = (unsigned long)CONFIG_MEMORY_START+PAGE_OFFSET;
101         memory_end = memory_start+(unsigned long)CONFIG_MEMORY_SIZE;
102
103         for ( ; ; ) {
104                 if (c == ' ' && !memcmp(from, "mem=", 4)) {
105                         if (to != command_line)
106                                 to--;
107
108                         {
109                                 unsigned long mem_size;
110
111                                 usermem = 1;
112                                 mem_size = memparse(from+4, &from);
113                                 memory_end = memory_start + mem_size;
114                         }
115                 }
116                 c = *(from++);
117                 if (!c)
118                         break;
119
120                 if (COMMAND_LINE_SIZE <= ++len)
121                         break;
122
123                 *(to++) = c;
124         }
125         *to = '\0';
126         *cmdline_p = command_line;
127         if (usermem)
128                 printk(KERN_INFO "user-defined physical RAM map:\n");
129 }
130
131 #ifndef CONFIG_DISCONTIGMEM
132 static unsigned long __init setup_memory(void)
133 {
134         unsigned long start_pfn, max_low_pfn, bootmap_size;
135
136         start_pfn = PFN_UP( __pa(_end) );
137         max_low_pfn = PFN_DOWN( __pa(memory_end) );
138
139         /*
140          * Initialize the boot-time allocator (with low memory only):
141          */
142         bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
143                 CONFIG_MEMORY_START>>PAGE_SHIFT, max_low_pfn);
144
145         /*
146          * Register fully available low RAM pages with the bootmem allocator.
147          */
148         {
149                 unsigned long curr_pfn;
150                 unsigned long last_pfn;
151                 unsigned long pages;
152
153                 /*
154                  * We are rounding up the start address of usable memory:
155                  */
156                 curr_pfn = PFN_UP(__pa(memory_start));
157
158                 /*
159                  * ... and at the end of the usable range downwards:
160                  */
161                 last_pfn = PFN_DOWN(__pa(memory_end));
162
163                 if (last_pfn > max_low_pfn)
164                         last_pfn = max_low_pfn;
165
166                 pages = last_pfn - curr_pfn;
167                 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
168         }
169
170         /*
171          * Reserve the kernel text and
172          * Reserve the bootmem bitmap. We do this in two steps (first step
173          * was init_bootmem()), because this catches the (definitely buggy)
174          * case of us accidentally initializing the bootmem allocator with
175          * an invalid RAM area.
176          */
177         reserve_bootmem(CONFIG_MEMORY_START + PAGE_SIZE,
178                 (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE - 1)
179                 - CONFIG_MEMORY_START);
180
181         /*
182          * reserve physical page 0 - it's a special BIOS page on many boxes,
183          * enabling clean reboots, SMP operation, laptop functions.
184          */
185         reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE);
186
187         /*
188          * reserve memory hole
189          */
190 #ifdef CONFIG_MEMHOLE
191         reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE);
192 #endif
193
194 #ifdef CONFIG_BLK_DEV_INITRD
195         if (LOADER_TYPE && INITRD_START) {
196                 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
197                         reserve_bootmem(INITRD_START, INITRD_SIZE);
198                         initrd_start = INITRD_START ?
199                                 INITRD_START + PAGE_OFFSET : 0;
200
201                         initrd_end = initrd_start + INITRD_SIZE;
202                         printk("initrd:start[%08lx],size[%08lx]\n",
203                                 initrd_start, INITRD_SIZE);
204                 } else {
205                         printk("initrd extends beyond end of memory "
206                                 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
207                                 INITRD_START + INITRD_SIZE,
208                                 max_low_pfn << PAGE_SHIFT);
209
210                         initrd_start = 0;
211                 }
212         }
213 #endif
214
215         return max_low_pfn;
216 }
217 #else   /* CONFIG_DISCONTIGMEM */
218 extern unsigned long setup_memory(void);
219 #endif  /* CONFIG_DISCONTIGMEM */
220
221 #define M32R_PCC_PCATCR 0x00ef7014      /* will move to m32r.h */
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[NR_CPUS];
272
273 static int __init topology_init(void)
274 {
275         int cpu_id;
276
277         for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++)
278                 if (cpu_possible(cpu_id))
279                         register_cpu(&cpu[cpu_id], cpu_id, NULL);
280
281         return 0;
282 }
283
284 subsys_initcall(topology_init);
285
286 #ifdef CONFIG_PROC_FS
287 /*
288  *      Get CPU information for use by the procfs.
289  */
290 static int show_cpuinfo(struct seq_file *m, void *v)
291 {
292         struct cpuinfo_m32r *c = v;
293         unsigned long cpu = c - cpu_data;
294
295 #ifdef CONFIG_SMP
296         if (!cpu_online(cpu))
297                 return 0;
298 #endif  /* CONFIG_SMP */
299
300         seq_printf(m, "processor\t: %ld\n", cpu);
301
302 #if defined(CONFIG_CHIP_VDEC2)
303         seq_printf(m, "cpu family\t: VDEC2\n"
304                 "cache size\t: Unknown\n");
305 #elif defined(CONFIG_CHIP_M32700)
306         seq_printf(m,"cpu family\t: M32700\n"
307                 "cache size\t: I-8KB/D-8KB\n");
308 #elif defined(CONFIG_CHIP_M32102)
309         seq_printf(m,"cpu family\t: M32102\n"
310                 "cache size\t: I-8KB\n");
311 #elif defined(CONFIG_CHIP_OPSP)
312         seq_printf(m,"cpu family\t: OPSP\n"
313                 "cache size\t: I-8KB/D-8KB\n");
314 #elif defined(CONFIG_CHIP_MP)
315         seq_printf(m, "cpu family\t: M32R-MP\n"
316                 "cache size\t: I-xxKB/D-xxKB\n");
317 #elif  defined(CONFIG_CHIP_M32104)
318         seq_printf(m,"cpu family\t: M32104\n"
319                 "cache size\t: I-8KB/D-8KB\n");
320 #else
321         seq_printf(m, "cpu family\t: Unknown\n");
322 #endif
323         seq_printf(m, "bogomips\t: %lu.%02lu\n",
324                 c->loops_per_jiffy/(500000/HZ),
325                 (c->loops_per_jiffy/(5000/HZ)) % 100);
326 #if defined(CONFIG_PLAT_MAPPI)
327         seq_printf(m, "Machine\t\t: Mappi Evaluation board\n");
328 #elif defined(CONFIG_PLAT_MAPPI2)
329         seq_printf(m, "Machine\t\t: Mappi-II Evaluation board\n");
330 #elif defined(CONFIG_PLAT_MAPPI3)
331         seq_printf(m, "Machine\t\t: Mappi-III Evaluation board\n");
332 #elif defined(CONFIG_PLAT_M32700UT)
333         seq_printf(m, "Machine\t\t: M32700UT Evaluation board\n");
334 #elif defined(CONFIG_PLAT_OPSPUT)
335         seq_printf(m, "Machine\t\t: OPSPUT Evaluation board\n");
336 #elif defined(CONFIG_PLAT_USRV)
337         seq_printf(m, "Machine\t\t: uServer\n");
338 #elif defined(CONFIG_PLAT_OAKS32R)
339         seq_printf(m, "Machine\t\t: OAKS32R\n");
340 #elif  defined(CONFIG_PLAT_M32104UT)
341         seq_printf(m, "Machine\t\t: M3T-M32104UT uT Engine board\n");
342 #else
343         seq_printf(m, "Machine\t\t: Unknown\n");
344 #endif
345
346 #define PRINT_CLOCK(name, value)                                \
347         seq_printf(m, name " clock\t: %d.%02dMHz\n",            \
348                 ((value) / 1000000), ((value) % 1000000)/10000)
349
350         PRINT_CLOCK("CPU", (int)c->cpu_clock);
351         PRINT_CLOCK("Bus", (int)c->bus_clock);
352
353         seq_printf(m, "\n");
354
355         return 0;
356 }
357
358 static void *c_start(struct seq_file *m, loff_t *pos)
359 {
360         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
361 }
362
363 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
364 {
365         ++*pos;
366         return c_start(m, pos);
367 }
368
369 static void c_stop(struct seq_file *m, void *v)
370 {
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 */
380
381 unsigned long cpu_initialized __initdata = 0;
382
383 /*
384  * cpu_init() initializes state that is per-CPU. Some data is already
385  * initialized (naturally) in the bootstrap process.
386  * We reload them nevertheless, this function acts as a
387  * 'CPU state barrier', nothing should get across.
388  */
389 #if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2)    \
390         || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \
391         || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)
392 void __init cpu_init (void)
393 {
394         int cpu_id = smp_processor_id();
395
396         if (test_and_set_bit(cpu_id, &cpu_initialized)) {
397                 printk(KERN_WARNING "CPU#%d already initialized!\n", cpu_id);
398                 for ( ; ; )
399                         local_irq_enable();
400         }
401         printk(KERN_INFO "Initializing CPU#%d\n", cpu_id);
402
403         /* Set up and load the per-CPU TSS and LDT */
404         atomic_inc(&init_mm.mm_count);
405         current->active_mm = &init_mm;
406         if (current->mm)
407                 BUG();
408
409         /* Force FPU initialization */
410         current_thread_info()->status = 0;
411         clear_used_math();
412
413 #ifdef CONFIG_MMU
414         /* Set up MMU */
415         init_mmu();
416 #endif
417
418         /* Set up ICUIMASK */
419         outl(0x00070000, M32R_ICU_IMASK_PORTL);         /* imask=111 */
420 }
421 #endif  /* defined(CONFIG_CHIP_VDEC2) ... */