Merge "This patch removes the ovs kernel modules from kvmfornfv kernel modules for...
[kvmfornfv.git] / kernel / 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/init.h>
11 #include <linux/kernel.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/screen_info.h>
25 #include <linux/cpu.h>
26 #include <linux/nodemask.h>
27 #include <linux/pfn.h>
28
29 #include <asm/processor.h>
30 #include <asm/pgtable.h>
31 #include <asm/io.h>
32 #include <asm/mmu_context.h>
33 #include <asm/m32r.h>
34 #include <asm/setup.h>
35 #include <asm/sections.h>
36
37 #ifdef CONFIG_MMU
38 extern void init_mmu(void);
39 #endif
40
41 extern char _end[];
42
43 /*
44  * Machine setup..
45  */
46 struct cpuinfo_m32r boot_cpu_data;
47
48 #ifdef CONFIG_BLK_DEV_RAM
49 extern int rd_doload;   /* 1 = load ramdisk, 0 = don't load */
50 extern int rd_prompt;   /* 1 = prompt for ramdisk, 0 = don't prompt */
51 extern int rd_image_start;      /* starting block # of image */
52 #endif
53
54 #if defined(CONFIG_VGA_CONSOLE)
55 struct screen_info screen_info = {
56         .orig_video_lines      = 25,
57         .orig_video_cols       = 80,
58         .orig_video_mode       = 0,
59         .orig_video_ega_bx     = 0,
60         .orig_video_isVGA      = 1,
61         .orig_video_points     = 8
62 };
63 #endif
64
65 extern int root_mountflags;
66
67 static char __initdata command_line[COMMAND_LINE_SIZE];
68
69 static struct resource data_resource = {
70         .name   = "Kernel data",
71         .start  = 0,
72         .end    = 0,
73         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
74 };
75
76 static struct resource code_resource = {
77         .name   = "Kernel code",
78         .start  = 0,
79         .end    = 0,
80         .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
81 };
82
83 unsigned long memory_start;
84 EXPORT_SYMBOL(memory_start);
85
86 unsigned long memory_end;
87 EXPORT_SYMBOL(memory_end);
88
89 void __init setup_arch(char **);
90 int get_cpuinfo(char *);
91
92 static __inline__ void parse_mem_cmdline(char ** cmdline_p)
93 {
94         char c = ' ';
95         char *to = command_line;
96         char *from = COMMAND_LINE;
97         int len = 0;
98         int usermem = 0;
99
100         /* Save unparsed command line copy for /proc/cmdline */
101         memcpy(boot_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
102         boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
103
104         memory_start = (unsigned long)CONFIG_MEMORY_START+PAGE_OFFSET;
105         memory_end = memory_start+(unsigned long)CONFIG_MEMORY_SIZE;
106
107         for ( ; ; ) {
108                 if (c == ' ' && !memcmp(from, "mem=", 4)) {
109                         if (to != command_line)
110                                 to--;
111
112                         {
113                                 unsigned long mem_size;
114
115                                 usermem = 1;
116                                 mem_size = memparse(from+4, &from);
117                                 memory_end = memory_start + mem_size;
118                         }
119                 }
120                 c = *(from++);
121                 if (!c)
122                         break;
123
124                 if (COMMAND_LINE_SIZE <= ++len)
125                         break;
126
127                 *(to++) = c;
128         }
129         *to = '\0';
130         *cmdline_p = command_line;
131         if (usermem)
132                 printk(KERN_INFO "user-defined physical RAM map:\n");
133 }
134
135 #ifndef CONFIG_DISCONTIGMEM
136 static unsigned long __init setup_memory(void)
137 {
138         unsigned long start_pfn, max_low_pfn, bootmap_size;
139
140         start_pfn = PFN_UP( __pa(_end) );
141         max_low_pfn = PFN_DOWN( __pa(memory_end) );
142
143         /*
144          * Initialize the boot-time allocator (with low memory only):
145          */
146         bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
147                 CONFIG_MEMORY_START>>PAGE_SHIFT, max_low_pfn);
148
149         /*
150          * Register fully available low RAM pages with the bootmem allocator.
151          */
152         {
153                 unsigned long curr_pfn;
154                 unsigned long last_pfn;
155                 unsigned long pages;
156
157                 /*
158                  * We are rounding up the start address of usable memory:
159                  */
160                 curr_pfn = PFN_UP(__pa(memory_start));
161
162                 /*
163                  * ... and at the end of the usable range downwards:
164                  */
165                 last_pfn = PFN_DOWN(__pa(memory_end));
166
167                 if (last_pfn > max_low_pfn)
168                         last_pfn = max_low_pfn;
169
170                 pages = last_pfn - curr_pfn;
171                 free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
172         }
173
174         /*
175          * Reserve the kernel text and
176          * Reserve the bootmem bitmap. We do this in two steps (first step
177          * was init_bootmem()), because this catches the (definitely buggy)
178          * case of us accidentally initializing the bootmem allocator with
179          * an invalid RAM area.
180          */
181         reserve_bootmem(CONFIG_MEMORY_START + PAGE_SIZE,
182                 (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE - 1)
183                 - CONFIG_MEMORY_START,
184                 BOOTMEM_DEFAULT);
185
186         /*
187          * reserve physical page 0 - it's a special BIOS page on many boxes,
188          * enabling clean reboots, SMP operation, laptop functions.
189          */
190         reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE, BOOTMEM_DEFAULT);
191
192         /*
193          * reserve memory hole
194          */
195 #ifdef CONFIG_MEMHOLE
196         reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE,
197                         BOOTMEM_DEFAULT);
198 #endif
199
200 #ifdef CONFIG_BLK_DEV_INITRD
201         if (LOADER_TYPE && INITRD_START) {
202                 if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
203                         reserve_bootmem(INITRD_START, INITRD_SIZE,
204                                         BOOTMEM_DEFAULT);
205                         initrd_start = INITRD_START + PAGE_OFFSET;
206                         initrd_end = initrd_start + INITRD_SIZE;
207                         printk("initrd:start[%08lx],size[%08lx]\n",
208                                 initrd_start, INITRD_SIZE);
209                 } else {
210                         printk("initrd extends beyond end of memory "
211                                 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
212                                 INITRD_START + INITRD_SIZE,
213                                 max_low_pfn << PAGE_SHIFT);
214
215                         initrd_start = 0;
216                 }
217         }
218 #endif
219
220         return max_low_pfn;
221 }
222 #else   /* CONFIG_DISCONTIGMEM */
223 extern unsigned long setup_memory(void);
224 #endif  /* CONFIG_DISCONTIGMEM */
225
226 void __init setup_arch(char **cmdline_p)
227 {
228         ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
229
230         boot_cpu_data.cpu_clock = M32R_CPUCLK;
231         boot_cpu_data.bus_clock = M32R_BUSCLK;
232         boot_cpu_data.timer_divide = M32R_TIMER_DIVIDE;
233
234 #ifdef CONFIG_BLK_DEV_RAM
235         rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
236         rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
237         rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
238 #endif
239
240         if (!MOUNT_ROOT_RDONLY)
241                 root_mountflags &= ~MS_RDONLY;
242
243 #ifdef CONFIG_VT
244 #if defined(CONFIG_VGA_CONSOLE)
245         conswitchp = &vga_con;
246 #elif defined(CONFIG_DUMMY_CONSOLE)
247         conswitchp = &dummy_con;
248 #endif
249 #endif
250
251 #ifdef CONFIG_DISCONTIGMEM
252         nodes_clear(node_online_map);
253         node_set_online(0);
254         node_set_online(1);
255 #endif  /* CONFIG_DISCONTIGMEM */
256
257         init_mm.start_code = (unsigned long) _text;
258         init_mm.end_code = (unsigned long) _etext;
259         init_mm.end_data = (unsigned long) _edata;
260         init_mm.brk = (unsigned long) _end;
261
262         code_resource.start = virt_to_phys(_text);
263         code_resource.end = virt_to_phys(_etext)-1;
264         data_resource.start = virt_to_phys(_etext);
265         data_resource.end = virt_to_phys(_edata)-1;
266
267         parse_mem_cmdline(cmdline_p);
268
269         setup_memory();
270
271         paging_init();
272 }
273
274 static struct cpu cpu_devices[NR_CPUS];
275
276 static int __init topology_init(void)
277 {
278         int i;
279
280         for_each_present_cpu(i)
281                 register_cpu(&cpu_devices[i], i);
282
283         return 0;
284 }
285
286 subsys_initcall(topology_init);
287
288 #ifdef CONFIG_PROC_FS
289 /*
290  *      Get CPU information for use by the procfs.
291  */
292 static int show_cpuinfo(struct seq_file *m, void *v)
293 {
294         struct cpuinfo_m32r *c = v;
295         unsigned long cpu = c - cpu_data;
296
297 #ifdef CONFIG_SMP
298         if (!cpu_online(cpu))
299                 return 0;
300 #endif  /* CONFIG_SMP */
301
302         seq_printf(m, "processor\t: %ld\n", cpu);
303
304 #if defined(CONFIG_CHIP_VDEC2)
305         seq_printf(m, "cpu family\t: VDEC2\n"
306                 "cache size\t: Unknown\n");
307 #elif defined(CONFIG_CHIP_M32700)
308         seq_printf(m,"cpu family\t: M32700\n"
309                 "cache size\t: I-8KB/D-8KB\n");
310 #elif defined(CONFIG_CHIP_M32102)
311         seq_printf(m,"cpu family\t: M32102\n"
312                 "cache size\t: I-8KB\n");
313 #elif defined(CONFIG_CHIP_OPSP)
314         seq_printf(m,"cpu family\t: OPSP\n"
315                 "cache size\t: I-8KB/D-8KB\n");
316 #elif defined(CONFIG_CHIP_MP)
317         seq_printf(m, "cpu family\t: M32R-MP\n"
318                 "cache size\t: I-xxKB/D-xxKB\n");
319 #elif  defined(CONFIG_CHIP_M32104)
320         seq_printf(m,"cpu family\t: M32104\n"
321                 "cache size\t: I-8KB/D-8KB\n");
322 #else
323         seq_printf(m, "cpu family\t: Unknown\n");
324 #endif
325         seq_printf(m, "bogomips\t: %lu.%02lu\n",
326                 c->loops_per_jiffy/(500000/HZ),
327                 (c->loops_per_jiffy/(5000/HZ)) % 100);
328 #if defined(CONFIG_PLAT_MAPPI)
329         seq_printf(m, "Machine\t\t: Mappi Evaluation board\n");
330 #elif defined(CONFIG_PLAT_MAPPI2)
331         seq_printf(m, "Machine\t\t: Mappi-II Evaluation board\n");
332 #elif defined(CONFIG_PLAT_MAPPI3)
333         seq_printf(m, "Machine\t\t: Mappi-III Evaluation board\n");
334 #elif defined(CONFIG_PLAT_M32700UT)
335         seq_printf(m, "Machine\t\t: M32700UT Evaluation board\n");
336 #elif defined(CONFIG_PLAT_OPSPUT)
337         seq_printf(m, "Machine\t\t: OPSPUT Evaluation board\n");
338 #elif defined(CONFIG_PLAT_USRV)
339         seq_printf(m, "Machine\t\t: uServer\n");
340 #elif defined(CONFIG_PLAT_OAKS32R)
341         seq_printf(m, "Machine\t\t: OAKS32R\n");
342 #elif  defined(CONFIG_PLAT_M32104UT)
343         seq_printf(m, "Machine\t\t: M3T-M32104UT uT Engine board\n");
344 #else
345         seq_printf(m, "Machine\t\t: Unknown\n");
346 #endif
347
348 #define PRINT_CLOCK(name, value)                                \
349         seq_printf(m, name " clock\t: %d.%02dMHz\n",            \
350                 ((value) / 1000000), ((value) % 1000000)/10000)
351
352         PRINT_CLOCK("CPU", (int)c->cpu_clock);
353         PRINT_CLOCK("Bus", (int)c->bus_clock);
354
355         seq_printf(m, "\n");
356
357         return 0;
358 }
359
360 static void *c_start(struct seq_file *m, loff_t *pos)
361 {
362         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
363 }
364
365 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
366 {
367         ++*pos;
368         return c_start(m, pos);
369 }
370
371 static void c_stop(struct seq_file *m, void *v)
372 {
373 }
374
375 const struct seq_operations cpuinfo_op = {
376         .start = c_start,
377         .next = c_next,
378         .stop = c_stop,
379         .show = show_cpuinfo,
380 };
381 #endif  /* CONFIG_PROC_FS */
382
383 unsigned long cpu_initialized __initdata = 0;
384
385 /*
386  * cpu_init() initializes state that is per-CPU. Some data is already
387  * initialized (naturally) in the bootstrap process.
388  * We reload them nevertheless, this function acts as a
389  * 'CPU state barrier', nothing should get across.
390  */
391 #if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2)    \
392         || defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \
393         || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)
394 void __init cpu_init (void)
395 {
396         int cpu_id = smp_processor_id();
397
398         if (test_and_set_bit(cpu_id, &cpu_initialized)) {
399                 printk(KERN_WARNING "CPU#%d already initialized!\n", cpu_id);
400                 for ( ; ; )
401                         local_irq_enable();
402         }
403         printk(KERN_INFO "Initializing CPU#%d\n", cpu_id);
404
405         /* Set up and load the per-CPU TSS and LDT */
406         atomic_inc(&init_mm.mm_count);
407         current->active_mm = &init_mm;
408         if (current->mm)
409                 BUG();
410
411         /* Force FPU initialization */
412         current_thread_info()->status = 0;
413         clear_used_math();
414
415 #ifdef CONFIG_MMU
416         /* Set up MMU */
417         init_mmu();
418 #endif
419
420         /* Set up ICUIMASK */
421         outl(0x00070000, M32R_ICU_IMASK_PORTL);         /* imask=111 */
422 }
423 #endif  /* defined(CONFIG_CHIP_VDEC2) ... */