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Merge branch 'master'
[linux-2.6-block.git] / arch / m32r / kernel / setup.c
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1da177e4
LT		 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>
7c1c4e54 12#include <linux/kernel.h>
1da177e4
LT		 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>
22a9835c 28#include <linux/pfn.h>
1da177e4
LT		 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
39extern void init_mmu(void);
40#endif
41
1da177e4
LT		 42extern char _end[];
43
44/*
45 * Machine setup..
46 */
47struct cpuinfo_m32r boot_cpu_data;
48
49#ifdef CONFIG_BLK_DEV_RAM
50extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */
51extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */
52extern int rd_image_start; /* starting block # of image */
53#endif
54
55#if defined(CONFIG_VGA_CONSOLE)
56struct 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
66extern int root_mountflags;
67
68static char command_line[COMMAND_LINE_SIZE];
69
70static struct resource data_resource = {
71 .name = "Kernel data",
72 .start = 0,
73 .end = 0,
74 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
75};
76
77static struct resource code_resource = {
78 .name = "Kernel code",
79 .start = 0,
80 .end = 0,
81 .flags = IORESOURCE_BUSY | IORESOURCE_MEM
82};
83
84unsigned long memory_start;
85unsigned long memory_end;
86
87void __init setup_arch(char **);
88int get_cpuinfo(char *);
89
90static __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
134static 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 */
220extern unsigned long setup_memory(void);
221#endif /* CONFIG_DISCONTIGMEM */
222
1da177e4
LT		 223void __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
7c1c4e54 271static struct cpu cpu_devices[NR_CPUS];
1da177e4
LT		 272
273static int __init topology_init(void)
274{
7c1c4e54 275 int i;
1da177e4 276
7c1c4e54
HT		 277 for_each_present_cpu(i)
278 register_cpu(&cpu_devices[i], i, NULL);
1da177e4
LT		 279
280 return 0;
281}
282
283subsys_initcall(topology_init);
284
285#ifdef CONFIG_PROC_FS
286/*
287 * Get CPU information for use by the procfs.
288 */
289static 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
c978b017 301#if defined(CONFIG_CHIP_VDEC2)
1da177e4
LT		 302 seq_printf(m, "cpu family\t: VDEC2\n"
303 "cache size\t: Unknown\n");
c978b017 304#elif defined(CONFIG_CHIP_M32700)
1da177e4
LT		 305 seq_printf(m,"cpu family\t: M32700\n"
306 "cache size\t: I-8KB/D-8KB\n");
c978b017 307#elif defined(CONFIG_CHIP_M32102)
1da177e4
LT		 308 seq_printf(m,"cpu family\t: M32102\n"
309 "cache size\t: I-8KB\n");
c978b017 310#elif defined(CONFIG_CHIP_OPSP)
1da177e4
LT		 311 seq_printf(m,"cpu family\t: OPSP\n"
312 "cache size\t: I-8KB/D-8KB\n");
c978b017 313#elif defined(CONFIG_CHIP_MP)
1da177e4
LT		 314 seq_printf(m, "cpu family\t: M32R-MP\n"
315 "cache size\t: I-xxKB/D-xxKB\n");
9287d95e
HT		 316#elif defined(CONFIG_CHIP_M32104)
317 seq_printf(m,"cpu family\t: M32104\n"
318 "cache size\t: I-8KB/D-8KB\n");
1da177e4
LT		 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);
c978b017 325#if defined(CONFIG_PLAT_MAPPI)
1da177e4 326 seq_printf(m, "Machine\t\t: Mappi Evaluation board\n");
c978b017 327#elif defined(CONFIG_PLAT_MAPPI2)
1da177e4 328 seq_printf(m, "Machine\t\t: Mappi-II Evaluation board\n");
c978b017 329#elif defined(CONFIG_PLAT_MAPPI3)
23680863 330 seq_printf(m, "Machine\t\t: Mappi-III Evaluation board\n");
c978b017 331#elif defined(CONFIG_PLAT_M32700UT)
1da177e4 332 seq_printf(m, "Machine\t\t: M32700UT Evaluation board\n");
c978b017 333#elif defined(CONFIG_PLAT_OPSPUT)
1da177e4 334 seq_printf(m, "Machine\t\t: OPSPUT Evaluation board\n");
c978b017 335#elif defined(CONFIG_PLAT_USRV)
1da177e4 336 seq_printf(m, "Machine\t\t: uServer\n");
c978b017 337#elif defined(CONFIG_PLAT_OAKS32R)
1da177e4 338 seq_printf(m, "Machine\t\t: OAKS32R\n");
9287d95e
HT		 339#elif defined(CONFIG_PLAT_M32104UT)
340 seq_printf(m, "Machine\t\t: M3T-M32104UT uT Engine board\n");
1da177e4
LT		 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
357static void *c_start(struct seq_file *m, loff_t *pos)
358{
359 return *pos < NR_CPUS ? cpu_data + *pos : NULL;
360}
361
362static void *c_next(struct seq_file *m, void *v, loff_t *pos)
363{
364 ++*pos;
365 return c_start(m, pos);
366}
367
368static void c_stop(struct seq_file *m, void *v)
369{
370}
371
372struct 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
380unsigned 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) \
9287d95e 390 || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)
1da177e4
LT		 391void __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) ... */
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