aboutsummaryrefslogtreecommitdiffstats
path: root/arch/m32r/kernel/setup.c
blob: 3f35ab3d2dc28060b6030c76b37726887e8edd5f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
/*
 *  linux/arch/m32r/kernel/setup.c
 *
 *  Setup routines for Renesas M32R
 *
 *  Copyright (c) 2001, 2002  Hiroyuki Kondo, Hirokazu Takata,
 *                            Hitoshi Yamamoto
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/console.h>
#include <linux/initrd.h>
#include <linux/major.h>
#include <linux/root_dev.h>
#include <linux/seq_file.h>
#include <linux/timex.h>
#include <linux/screen_info.h>
#include <linux/cpu.h>
#include <linux/nodemask.h>
#include <linux/pfn.h>

#include <asm/processor.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/mmu_context.h>
#include <asm/m32r.h>
#include <asm/setup.h>
#include <asm/sections.h>

#ifdef CONFIG_MMU
extern void init_mmu(void);
#endif

extern char _end[];

/*
 * Machine setup..
 */
struct cpuinfo_m32r boot_cpu_data;

#ifdef CONFIG_BLK_DEV_RAM
extern int rd_doload;	/* 1 = load ramdisk, 0 = don't load */
extern int rd_prompt;	/* 1 = prompt for ramdisk, 0 = don't prompt */
extern int rd_image_start;	/* starting block # of image */
#endif

#if defined(CONFIG_VGA_CONSOLE)
struct screen_info screen_info = {
	.orig_video_lines      = 25,
	.orig_video_cols       = 80,
	.orig_video_mode       = 0,
	.orig_video_ega_bx     = 0,
	.orig_video_isVGA      = 1,
	.orig_video_points     = 8
};
#endif

extern int root_mountflags;

static char command_line[COMMAND_LINE_SIZE];

static struct resource data_resource = {
	.name   = "Kernel data",
	.start  = 0,
	.end    = 0,
	.flags  = IORESOURCE_BUSY | IORESOURCE_MEM
};

static struct resource code_resource = {
	.name   = "Kernel code",
	.start  = 0,
	.end    = 0,
	.flags  = IORESOURCE_BUSY | IORESOURCE_MEM
};

unsigned long memory_start;
unsigned long memory_end;

void __init setup_arch(char **);
int get_cpuinfo(char *);

static __inline__ void parse_mem_cmdline(char ** cmdline_p)
{
	char c = ' ';
	char *to = command_line;
	char *from = COMMAND_LINE;
	int len = 0;
	int usermem = 0;

	/* Save unparsed command line copy for /proc/cmdline */
	memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
	saved_command_line[COMMAND_LINE_SIZE-1] = '\0';

	memory_start = (unsigned long)CONFIG_MEMORY_START+PAGE_OFFSET;
	memory_end = memory_start+(unsigned long)CONFIG_MEMORY_SIZE;

	for ( ; ; ) {
		if (c == ' ' && !memcmp(from, "mem=", 4)) {
			if (to != command_line)
				to--;

			{
				unsigned long mem_size;

				usermem = 1;
				mem_size = memparse(from+4, &from);
				memory_end = memory_start + mem_size;
			}
		}
		c = *(from++);
		if (!c)
			break;

		if (COMMAND_LINE_SIZE <= ++len)
			break;

		*(to++) = c;
	}
	*to = '\0';
	*cmdline_p = command_line;
	if (usermem)
		printk(KERN_INFO "user-defined physical RAM map:\n");
}

#ifndef CONFIG_DISCONTIGMEM
static unsigned long __init setup_memory(void)
{
	unsigned long start_pfn, max_low_pfn, bootmap_size;

	start_pfn = PFN_UP( __pa(_end) );
	max_low_pfn = PFN_DOWN( __pa(memory_end) );

	/*
	 * Initialize the boot-time allocator (with low memory only):
	 */
	bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
		CONFIG_MEMORY_START>>PAGE_SHIFT, max_low_pfn);

	/*
	 * Register fully available low RAM pages with the bootmem allocator.
	 */
	{
		unsigned long curr_pfn;
		unsigned long last_pfn;
		unsigned long pages;

		/*
		 * We are rounding up the start address of usable memory:
		 */
		curr_pfn = PFN_UP(__pa(memory_start));

		/*
		 * ... and at the end of the usable range downwards:
		 */
		last_pfn = PFN_DOWN(__pa(memory_end));

		if (last_pfn > max_low_pfn)
			last_pfn = max_low_pfn;

		pages = last_pfn - curr_pfn;
		free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
	}

	/*
	 * Reserve the kernel text and
	 * Reserve the bootmem bitmap. We do this in two steps (first step
	 * was init_bootmem()), because this catches the (definitely buggy)
	 * case of us accidentally initializing the bootmem allocator with
	 * an invalid RAM area.
	 */
	reserve_bootmem(CONFIG_MEMORY_START + PAGE_SIZE,
		(PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE - 1)
		- CONFIG_MEMORY_START);

	/*
	 * reserve physical page 0 - it's a special BIOS page on many boxes,
	 * enabling clean reboots, SMP operation, laptop functions.
	 */
	reserve_bootmem(CONFIG_MEMORY_START, PAGE_SIZE);

	/*
	 * reserve memory hole
	 */
#ifdef CONFIG_MEMHOLE
	reserve_bootmem(CONFIG_MEMHOLE_START, CONFIG_MEMHOLE_SIZE);
#endif

#ifdef CONFIG_BLK_DEV_INITRD
	if (LOADER_TYPE && INITRD_START) {
		if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
			reserve_bootmem(INITRD_START, INITRD_SIZE);
			initrd_start = INITRD_START ?
				INITRD_START + PAGE_OFFSET : 0;

			initrd_end = initrd_start + INITRD_SIZE;
			printk("initrd:start[%08lx],size[%08lx]\n",
				initrd_start, INITRD_SIZE);
		} else {
			printk("initrd extends beyond end of memory "
				"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
				INITRD_START + INITRD_SIZE,
				max_low_pfn << PAGE_SHIFT);

			initrd_start = 0;
		}
	}
#endif

	return max_low_pfn;
}
#else	/* CONFIG_DISCONTIGMEM */
extern unsigned long setup_memory(void);
#endif	/* CONFIG_DISCONTIGMEM */

void __init setup_arch(char **cmdline_p)
{
	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);

	boot_cpu_data.cpu_clock = M32R_CPUCLK;
	boot_cpu_data.bus_clock = M32R_BUSCLK;
	boot_cpu_data.timer_divide = M32R_TIMER_DIVIDE;

#ifdef CONFIG_BLK_DEV_RAM
	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
#endif

	if (!MOUNT_ROOT_RDONLY)
		root_mountflags &= ~MS_RDONLY;

#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
	conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
	conswitchp = &dummy_con;
#endif
#endif

#ifdef CONFIG_DISCONTIGMEM
	nodes_clear(node_online_map);
	node_set_online(0);
	node_set_online(1);
#endif	/* CONFIG_DISCONTIGMEM */

	init_mm.start_code = (unsigned long) _text;
	init_mm.end_code = (unsigned long) _etext;
	init_mm.end_data = (unsigned long) _edata;
	init_mm.brk = (unsigned long) _end;

	code_resource.start = virt_to_phys(_text);
	code_resource.end = virt_to_phys(_etext)-1;
	data_resource.start = virt_to_phys(_etext);
	data_resource.end = virt_to_phys(_edata)-1;

	parse_mem_cmdline(cmdline_p);

	setup_memory();

	paging_init();
}

static struct cpu cpu_devices[NR_CPUS];

static int __init topology_init(void)
{
	int i;

	for_each_present_cpu(i)
		register_cpu(&cpu_devices[i], i);

	return 0;
}

subsys_initcall(topology_init);

#ifdef CONFIG_PROC_FS
/*
 *	Get CPU information for use by the procfs.
 */
static int show_cpuinfo(struct seq_file *m, void *v)
{
	struct cpuinfo_m32r *c = v;
	unsigned long cpu = c - cpu_data;

#ifdef CONFIG_SMP
	if (!cpu_online(cpu))
		return 0;
#endif	/* CONFIG_SMP */

	seq_printf(m, "processor\t: %ld\n", cpu);

#if defined(CONFIG_CHIP_VDEC2)
	seq_printf(m, "cpu family\t: VDEC2\n"
		"cache size\t: Unknown\n");
#elif defined(CONFIG_CHIP_M32700)
	seq_printf(m,"cpu family\t: M32700\n"
		"cache size\t: I-8KB/D-8KB\n");
#elif defined(CONFIG_CHIP_M32102)
	seq_printf(m,"cpu family\t: M32102\n"
		"cache size\t: I-8KB\n");
#elif defined(CONFIG_CHIP_OPSP)
	seq_printf(m,"cpu family\t: OPSP\n"
		"cache size\t: I-8KB/D-8KB\n");
#elif defined(CONFIG_CHIP_MP)
	seq_printf(m, "cpu family\t: M32R-MP\n"
		"cache size\t: I-xxKB/D-xxKB\n");
#elif  defined(CONFIG_CHIP_M32104)
	seq_printf(m,"cpu family\t: M32104\n"
		"cache size\t: I-8KB/D-8KB\n");
#else
	seq_printf(m, "cpu family\t: Unknown\n");
#endif
	seq_printf(m, "bogomips\t: %lu.%02lu\n",
		c->loops_per_jiffy/(500000/HZ),
		(c->loops_per_jiffy/(5000/HZ)) % 100);
#if defined(CONFIG_PLAT_MAPPI)
	seq_printf(m, "Machine\t\t: Mappi Evaluation board\n");
#elif defined(CONFIG_PLAT_MAPPI2)
	seq_printf(m, "Machine\t\t: Mappi-II Evaluation board\n");
#elif defined(CONFIG_PLAT_MAPPI3)
	seq_printf(m, "Machine\t\t: Mappi-III Evaluation board\n");
#elif defined(CONFIG_PLAT_M32700UT)
	seq_printf(m, "Machine\t\t: M32700UT Evaluation board\n");
#elif defined(CONFIG_PLAT_OPSPUT)
	seq_printf(m, "Machine\t\t: OPSPUT Evaluation board\n");
#elif defined(CONFIG_PLAT_USRV)
	seq_printf(m, "Machine\t\t: uServer\n");
#elif defined(CONFIG_PLAT_OAKS32R)
	seq_printf(m, "Machine\t\t: OAKS32R\n");
#elif  defined(CONFIG_PLAT_M32104UT)
	seq_printf(m, "Machine\t\t: M3T-M32104UT uT Engine board\n");
#else
	seq_printf(m, "Machine\t\t: Unknown\n");
#endif

#define PRINT_CLOCK(name, value)				\
	seq_printf(m, name " clock\t: %d.%02dMHz\n",		\
		((value) / 1000000), ((value) % 1000000)/10000)

	PRINT_CLOCK("CPU", (int)c->cpu_clock);
	PRINT_CLOCK("Bus", (int)c->bus_clock);

	seq_printf(m, "\n");

	return 0;
}

static void *c_start(struct seq_file *m, loff_t *pos)
{
	return *pos < NR_CPUS ? cpu_data + *pos : NULL;
}

static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
	++*pos;
	return c_start(m, pos);
}

static void c_stop(struct seq_file *m, void *v)
{
}

struct seq_operations cpuinfo_op = {
	start:	c_start,
	next:	c_next,
	stop:	c_stop,
	show:	show_cpuinfo,
};
#endif	/* CONFIG_PROC_FS */

unsigned long cpu_initialized __initdata = 0;

/*
 * cpu_init() initializes state that is per-CPU. Some data is already
 * initialized (naturally) in the bootstrap process.
 * We reload them nevertheless, this function acts as a
 * 'CPU state barrier', nothing should get across.
 */
#if defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_XNUX2)	\
	|| defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_M32102) \
	|| defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)
void __init cpu_init (void)
{
	int cpu_id = smp_processor_id();

	if (test_and_set_bit(cpu_id, &cpu_initialized)) {
		printk(KERN_WARNING "CPU#%d already initialized!\n", cpu_id);
		for ( ; ; )
			local_irq_enable();
	}
	printk(KERN_INFO "Initializing CPU#%d\n", cpu_id);

	/* Set up and load the per-CPU TSS and LDT */
	atomic_inc(&init_mm.mm_count);
	current->active_mm = &init_mm;
	if (current->mm)
		BUG();

	/* Force FPU initialization */
	current_thread_info()->status = 0;
	clear_used_math();

#ifdef CONFIG_MMU
	/* Set up MMU */
	init_mmu();
#endif

	/* Set up ICUIMASK */
	outl(0x00070000, M32R_ICU_IMASK_PORTL);		/* imask=111 */
}
#endif	/* defined(CONFIG_CHIP_VDEC2) ... */