summaryrefslogtreecommitdiffstats
path: root/arch/parisc/kernel/setup.c
blob: f7ea626e29c9b3bce80d28062cbf802ab2313785 (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
/*
 *    Initial setup-routines for HP 9000 based hardware.
 *
 *    Copyright (C) 1991, 1992, 1995  Linus Torvalds
 *    Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de>
 *    Modifications copyright 1999 SuSE GmbH (Philipp Rumpf)
 *    Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net>
 *    Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org>
 *    Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net>
 *
 *    Initial PA-RISC Version: 04-23-1999 by Helge Deller
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2, or (at your option)
 *    any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <linux/kernel.h>
#include <linux/initrd.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/seq_file.h>
#define PCI_DEBUG
#include <linux/pci.h>
#undef PCI_DEBUG
#include <linux/proc_fs.h>
#include <linux/export.h>

#include <asm/processor.h>
#include <asm/pdc.h>
#include <asm/led.h>
#include <asm/machdep.h>	/* for pa7300lc_init() proto */
#include <asm/pdc_chassis.h>
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/unwind.h>

static char __initdata command_line[COMMAND_LINE_SIZE];

/* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;

#if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
int parisc_bus_is_phys __read_mostly = 1;	/* Assume no IOMMU is present */
EXPORT_SYMBOL(parisc_bus_is_phys);
#endif

void __init setup_cmdline(char **cmdline_p)
{
	extern unsigned int boot_args[];

	/* Collect stuff passed in from the boot loader */

	/* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
	if (boot_args[0] < 64) {
		/* called from hpux boot loader */
		boot_command_line[0] = '\0';
	} else {
		strlcpy(boot_command_line, (char *)__va(boot_args[1]),
			COMMAND_LINE_SIZE);

#ifdef CONFIG_BLK_DEV_INITRD
		if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
		{
		    initrd_start = (unsigned long)__va(boot_args[2]);
		    initrd_end = (unsigned long)__va(boot_args[3]);
		}
#endif
	}

	strcpy(command_line, boot_command_line);
	*cmdline_p = command_line;
}

#ifdef CONFIG_PA11
void __init dma_ops_init(void)
{
	switch (boot_cpu_data.cpu_type) {
	case pcx:
		/*
		 * We've got way too many dependencies on 1.1 semantics
		 * to support 1.0 boxes at this point.
		 */
		panic(	"PA-RISC Linux currently only supports machines that conform to\n"
			"the PA-RISC 1.1 or 2.0 architecture specification.\n");

	case pcxs:
	case pcxt:
		hppa_dma_ops = &pcx_dma_ops;
		break;
	case pcxl2:
		pa7300lc_init();
	case pcxl: /* falls through */
		hppa_dma_ops = &pcxl_dma_ops;
		break;
	default:
		break;
	}
}
#endif

extern int init_per_cpu(int cpuid);
extern void collect_boot_cpu_data(void);

void __init setup_arch(char **cmdline_p)
{
#ifdef CONFIG_64BIT
	extern int parisc_narrow_firmware;
#endif
	unwind_init();

	init_per_cpu(smp_processor_id());	/* Set Modes & Enable FP */

#ifdef CONFIG_64BIT
	printk(KERN_INFO "The 64-bit Kernel has started...\n");
#else
	printk(KERN_INFO "The 32-bit Kernel has started...\n");
#endif

	printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
		(int)(PAGE_SIZE / 1024));
#ifdef CONFIG_HUGETLB_PAGE
	printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
		 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
#else
	printk(KERN_CONT "disabled");
#endif
	printk(KERN_CONT ".\n");


	pdc_console_init();

#ifdef CONFIG_64BIT
	if(parisc_narrow_firmware) {
		printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
	}
#endif
	setup_pdc();
	setup_cmdline(cmdline_p);
	collect_boot_cpu_data();
	do_memory_inventory();  /* probe for physical memory */
	parisc_cache_init();
	paging_init();

#ifdef CONFIG_CHASSIS_LCD_LED
	/* initialize the LCD/LED after boot_cpu_data is available ! */
	led_init();		/* LCD/LED initialization */
#endif

#ifdef CONFIG_PA11
	dma_ops_init();
#endif

#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
	conswitchp = &dummy_con;	/* we use do_take_over_console() later ! */
#endif

}

/*
 * Display CPU info for all CPUs.
 * for parisc this is in processor.c
 */
extern int show_cpuinfo (struct seq_file *m, void *v);

static void *
c_start (struct seq_file *m, loff_t *pos)
{
    	/* Looks like the caller will call repeatedly until we return
	 * 0, signaling EOF perhaps.  This could be used to sequence
	 * through CPUs for example.  Since we print all cpu info in our
	 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
	 * we only allow for one "position".  */
	return ((long)*pos < 1) ? (void *)1 : 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)
{
}

const struct seq_operations cpuinfo_op = {
	.start	= c_start,
	.next	= c_next,
	.stop	= c_stop,
	.show	= show_cpuinfo
};

static void __init parisc_proc_mkdir(void)
{
	/*
	** Can't call proc_mkdir() until after proc_root_init() has been
	** called by start_kernel(). In other words, this code can't
	** live in arch/.../setup.c because start_parisc() calls
	** start_kernel().
	*/
	switch (boot_cpu_data.cpu_type) {
	case pcxl:
	case pcxl2:
		if (NULL == proc_gsc_root)
		{
			proc_gsc_root = proc_mkdir("bus/gsc", NULL);
		}
		break;
        case pcxt_:
        case pcxu:
        case pcxu_:
        case pcxw:
        case pcxw_:
        case pcxw2:
                if (NULL == proc_runway_root)
                {
                        proc_runway_root = proc_mkdir("bus/runway", NULL);
                }
                break;
	case mako:
	case mako2:
                if (NULL == proc_mckinley_root)
                {
                        proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
                }
                break;
	default:
		/* FIXME: this was added to prevent the compiler 
		 * complaining about missing pcx, pcxs and pcxt
		 * I'm assuming they have neither gsc nor runway */
		break;
	}
}

static struct resource central_bus = {
	.name	= "Central Bus",
	.start	= F_EXTEND(0xfff80000),
	.end    = F_EXTEND(0xfffaffff),
	.flags	= IORESOURCE_MEM,
};

static struct resource local_broadcast = {
	.name	= "Local Broadcast",
	.start	= F_EXTEND(0xfffb0000),
	.end	= F_EXTEND(0xfffdffff),
	.flags	= IORESOURCE_MEM,
};

static struct resource global_broadcast = {
	.name	= "Global Broadcast",
	.start	= F_EXTEND(0xfffe0000),
	.end	= F_EXTEND(0xffffffff),
	.flags	= IORESOURCE_MEM,
};

static int __init parisc_init_resources(void)
{
	int result;

	result = request_resource(&iomem_resource, &central_bus);
	if (result < 0) {
		printk(KERN_ERR 
		       "%s: failed to claim %s address space!\n", 
		       __FILE__, central_bus.name);
		return result;
	}

	result = request_resource(&iomem_resource, &local_broadcast);
	if (result < 0) {
		printk(KERN_ERR 
		       "%s: failed to claim %saddress space!\n", 
		       __FILE__, local_broadcast.name);
		return result;
	}

	result = request_resource(&iomem_resource, &global_broadcast);
	if (result < 0) {
		printk(KERN_ERR 
		       "%s: failed to claim %s address space!\n", 
		       __FILE__, global_broadcast.name);
		return result;
	}

	return 0;
}

extern void gsc_init(void);
extern void processor_init(void);
extern void ccio_init(void);
extern void hppb_init(void);
extern void dino_init(void);
extern void iosapic_init(void);
extern void lba_init(void);
extern void sba_init(void);
extern void eisa_init(void);

static int __init parisc_init(void)
{
	u32 osid = (OS_ID_LINUX << 16);

	parisc_proc_mkdir();
	parisc_init_resources();
	do_device_inventory();                  /* probe for hardware */

	parisc_pdc_chassis_init();
	
	/* set up a new led state on systems shipped LED State panel */
	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);

	/* tell PDC we're Linux. Nevermind failure. */
	pdc_stable_write(0x40, &osid, sizeof(osid));
	
	processor_init();
#ifdef CONFIG_SMP
	pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
		num_online_cpus(), num_present_cpus(),
#else
	pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
#endif
			boot_cpu_data.cpu_name,
			boot_cpu_data.cpu_hz / 1000000,
			boot_cpu_data.cpu_hz % 1000000	);

	parisc_setup_cache_timing();

	/* These are in a non-obvious order, will fix when we have an iotree */
#if defined(CONFIG_IOSAPIC)
	iosapic_init();
#endif
#if defined(CONFIG_IOMMU_SBA)
	sba_init();
#endif
#if defined(CONFIG_PCI_LBA)
	lba_init();
#endif

	/* CCIO before any potential subdevices */
#if defined(CONFIG_IOMMU_CCIO)
	ccio_init();
#endif

	/*
	 * Need to register Asp & Wax before the EISA adapters for the IRQ
	 * regions.  EISA must come before PCI to be sure it gets IRQ region
	 * 0.
	 */
#if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
	gsc_init();
#endif
#ifdef CONFIG_EISA
	eisa_init();
#endif

#if defined(CONFIG_HPPB)
	hppb_init();
#endif

#if defined(CONFIG_GSC_DINO)
	dino_init();
#endif

#ifdef CONFIG_CHASSIS_LCD_LED
	register_led_regions();	/* register LED port info in procfs */
#endif

	return 0;
}
arch_initcall(parisc_init);

void start_parisc(void)
{
	extern void start_kernel(void);
	extern void early_trap_init(void);

	int ret, cpunum;
	struct pdc_coproc_cfg coproc_cfg;

	cpunum = smp_processor_id();

	set_firmware_width_unlocked();

	ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
	if (ret >= 0 && coproc_cfg.ccr_functional) {
		mtctl(coproc_cfg.ccr_functional, 10);

		per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
		per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;

		asm volatile ("fstd	%fr0,8(%sp)");
	} else {
		panic("must have an fpu to boot linux");
	}

	early_trap_init(); /* initialize checksum of fault_vector */

	start_kernel();
	// not reached
}
OpenPOWER on IntegriCloud