aboutsummaryrefslogtreecommitdiffstats
path: root/arch/i386/mach-voyager/voyager_basic.c
blob: 8fe7e4593d5fe7aca75b81d35bbb70863427bcb2 (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
/* Copyright (C) 1999,2001 
 *
 * Author: J.E.J.Bottomley@HansenPartnership.com
 *
 * linux/arch/i386/kernel/voyager.c
 *
 * This file contains all the voyager specific routines for getting
 * initialisation of the architecture to function.  For additional
 * features see:
 *
 *	voyager_cat.c - Voyager CAT bus interface
 *	voyager_smp.c - Voyager SMP hal (emulates linux smp.c)
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/reboot.h>
#include <linux/sysrq.h>
#include <linux/smp.h>
#include <linux/nodemask.h>
#include <asm/io.h>
#include <asm/voyager.h>
#include <asm/vic.h>
#include <linux/pm.h>
#include <asm/tlbflush.h>
#include <asm/arch_hooks.h>
#include <asm/i8253.h>

/*
 * Power off function, if any
 */
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);

int voyager_level = 0;

struct voyager_SUS *voyager_SUS = NULL;

#ifdef CONFIG_SMP
static void
voyager_dump(int dummy1, struct tty_struct *dummy3)
{
	/* get here via a sysrq */
	voyager_smp_dump();
}

static struct sysrq_key_op sysrq_voyager_dump_op = {
	.handler	= voyager_dump,
	.help_msg	= "Voyager",
	.action_msg	= "Dump Voyager Status",
};
#endif

void
voyager_detect(struct voyager_bios_info *bios)
{
	if(bios->len != 0xff) {
		int class = (bios->class_1 << 8) 
			| (bios->class_2 & 0xff);

		printk("Voyager System detected.\n"
		       "        Class %x, Revision %d.%d\n",
		       class, bios->major, bios->minor);
		if(class == VOYAGER_LEVEL4) 
			voyager_level = 4;
		else if(class < VOYAGER_LEVEL5_AND_ABOVE)
			voyager_level = 3;
		else
			voyager_level = 5;
		printk("        Architecture Level %d\n", voyager_level);
		if(voyager_level < 4)
			printk("\n**WARNING**: Voyager HAL only supports Levels 4 and 5 Architectures at the moment\n\n");
		/* install the power off handler */
		pm_power_off = voyager_power_off;
#ifdef CONFIG_SMP
		register_sysrq_key('v', &sysrq_voyager_dump_op);
#endif
	} else {
		printk("\n\n**WARNING**: No Voyager Subsystem Found\n");
	}
}

void
voyager_system_interrupt(int cpl, void *dev_id)
{
	printk("Voyager: detected system interrupt\n");
}

/* Routine to read information from the extended CMOS area */
__u8
voyager_extended_cmos_read(__u16 addr)
{
	outb(addr & 0xff, 0x74);
	outb((addr >> 8) & 0xff, 0x75);
	return inb(0x76);
}

/* internal definitions for the SUS Click Map of memory */

#define CLICK_ENTRIES	16
#define CLICK_SIZE	4096	/* click to byte conversion for Length */

typedef struct ClickMap {
	struct Entry {
		__u32	Address;
		__u32	Length;
	} Entry[CLICK_ENTRIES];
} ClickMap_t;


/* This routine is pretty much an awful hack to read the bios clickmap by
 * mapping it into page 0.  There are usually three regions in the map:
 * 	Base Memory
 * 	Extended Memory
 *	zero length marker for end of map
 *
 * Returns are 0 for failure and 1 for success on extracting region.
 */
int __init
voyager_memory_detect(int region, __u32 *start, __u32 *length)
{
	int i;
	int retval = 0;
	__u8 cmos[4];
	ClickMap_t *map;
	unsigned long map_addr;
	unsigned long old;

	if(region >= CLICK_ENTRIES) {
		printk("Voyager: Illegal ClickMap region %d\n", region);
		return 0;
	}

	for(i = 0; i < sizeof(cmos); i++)
		cmos[i] = voyager_extended_cmos_read(VOYAGER_MEMORY_CLICKMAP + i);

	map_addr = *(unsigned long *)cmos;

	/* steal page 0 for this */
	old = pg0[0];
	pg0[0] = ((map_addr & PAGE_MASK) | _PAGE_RW | _PAGE_PRESENT);
	local_flush_tlb();
	/* now clear everything out but page 0 */
	map = (ClickMap_t *)(map_addr & (~PAGE_MASK));

	/* zero length is the end of the clickmap */
	if(map->Entry[region].Length != 0) {
		*length = map->Entry[region].Length * CLICK_SIZE;
		*start = map->Entry[region].Address;
		retval = 1;
	}

	/* replace the mapping */
	pg0[0] = old;
	local_flush_tlb();
	return retval;
}

/* voyager specific handling code for timer interrupts.  Used to hand
 * off the timer tick to the SMP code, since the VIC doesn't have an
 * internal timer (The QIC does, but that's another story). */
void
voyager_timer_interrupt(void)
{
	if((jiffies & 0x3ff) == 0) {

		/* There seems to be something flaky in either
		 * hardware or software that is resetting the timer 0
		 * count to something much higher than it should be
		 * This seems to occur in the boot sequence, just
		 * before root is mounted.  Therefore, every 10
		 * seconds or so, we sanity check the timer zero count
		 * and kick it back to where it should be.
		 *
		 * FIXME: This is the most awful hack yet seen.  I
		 * should work out exactly what is interfering with
		 * the timer count settings early in the boot sequence
		 * and swiftly introduce it to something sharp and
		 * pointy.  */
		__u16 val;

		spin_lock(&i8253_lock);
		
		outb_p(0x00, 0x43);
		val = inb_p(0x40);
		val |= inb(0x40) << 8;
		spin_unlock(&i8253_lock);

		if(val > LATCH) {
			printk("\nVOYAGER: countdown timer value too high (%d), resetting\n\n", val);
			spin_lock(&i8253_lock);
			outb(0x34,0x43);
			outb_p(LATCH & 0xff , 0x40);	/* LSB */
			outb(LATCH >> 8 , 0x40);	/* MSB */
			spin_unlock(&i8253_lock);
		}
	}
#ifdef CONFIG_SMP
	smp_vic_timer_interrupt();
#endif
}

void
voyager_power_off(void)
{
	printk("VOYAGER Power Off\n");

	if(voyager_level == 5) {
		voyager_cat_power_off();
	} else if(voyager_level == 4) {
		/* This doesn't apparently work on most L4 machines,
		 * but the specs say to do this to get automatic power
		 * off.  Unfortunately, if it doesn't power off the
		 * machine, it ends up doing a cold restart, which
		 * isn't really intended, so comment out the code */
#if 0
		int port;

	  
		/* enable the voyager Configuration Space */
		outb((inb(VOYAGER_MC_SETUP) & 0xf0) | 0x8, 
		     VOYAGER_MC_SETUP);
		/* the port for the power off flag is an offset from the
		   floating base */
		port = (inb(VOYAGER_SSPB_RELOCATION_PORT) << 8) + 0x21;
		/* set the power off flag */
		outb(inb(port) | 0x1, port);
#endif
	}
	/* and wait for it to happen */
	local_irq_disable();
	for(;;)
		halt();
}

/* copied from process.c */
static inline void
kb_wait(void)
{
	int i;

	for (i=0; i<0x10000; i++)
		if ((inb_p(0x64) & 0x02) == 0)
			break;
}

void
machine_shutdown(void)
{
	/* Architecture specific shutdown needed before a kexec */
}

void
machine_restart(char *cmd)
{
	printk("Voyager Warm Restart\n");
	kb_wait();

	if(voyager_level == 5) {
		/* write magic values to the RTC to inform system that
		 * shutdown is beginning */
		outb(0x8f, 0x70);
		outb(0x5 , 0x71);
		
		udelay(50);
		outb(0xfe,0x64);         /* pull reset low */
	} else if(voyager_level == 4) {
		__u16 catbase = inb(VOYAGER_SSPB_RELOCATION_PORT)<<8;
		__u8 basebd = inb(VOYAGER_MC_SETUP);
		
		outb(basebd | 0x08, VOYAGER_MC_SETUP);
		outb(0x02, catbase + 0x21);
	}
	local_irq_disable();
	for(;;)
		halt();
}

void
machine_emergency_restart(void)
{
	/*for now, just hook this to a warm restart */
	machine_restart(NULL);
}

void
mca_nmi_hook(void)
{
	__u8 dumpval __attribute__((unused)) = inb(0xf823);
	__u8 swnmi __attribute__((unused)) = inb(0xf813);

	/* FIXME: assume dump switch pressed */
	/* check to see if the dump switch was pressed */
	VDEBUG(("VOYAGER: dumpval = 0x%x, swnmi = 0x%x\n", dumpval, swnmi));
	/* clear swnmi */
	outb(0xff, 0xf813);
	/* tell SUS to ignore dump */
	if(voyager_level == 5 && voyager_SUS != NULL) {
		if(voyager_SUS->SUS_mbox == VOYAGER_DUMP_BUTTON_NMI) {
			voyager_SUS->kernel_mbox = VOYAGER_NO_COMMAND;
			voyager_SUS->kernel_flags |= VOYAGER_OS_IN_PROGRESS;
			udelay(1000);
			voyager_SUS->kernel_mbox = VOYAGER_IGNORE_DUMP;
			voyager_SUS->kernel_flags &= ~VOYAGER_OS_IN_PROGRESS;
		}
	}
	printk(KERN_ERR "VOYAGER: Dump switch pressed, printing CPU%d tracebacks\n", smp_processor_id());
	show_stack(NULL, NULL);
	show_state();
}



void
machine_halt(void)
{
	/* treat a halt like a power off */
	machine_power_off();
}

void machine_power_off(void)
{
	if (pm_power_off)
		pm_power_off();
}

Privacy Policy