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Chris Zankel7282bee2005-06-23 22:01:33 -07001/*
2 *
3 * arch/xtensa/platform-iss/setup.c
4 *
5 * Platform specific initialization.
6 *
7 * Authors: Chris Zankel <chris@zankel.net>
8 * Joe Taylor <joe@tensilica.com>
9 *
10 * Copyright 2001 - 2005 Tensilica Inc.
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
Chris Zankel7282bee2005-06-23 22:01:33 -070018#include <linux/stddef.h>
19#include <linux/kernel.h>
20#include <linux/init.h>
21#include <linux/errno.h>
22#include <linux/reboot.h>
Chris Zankel7282bee2005-06-23 22:01:33 -070023#include <linux/kdev_t.h>
24#include <linux/types.h>
25#include <linux/major.h>
26#include <linux/blkdev.h>
27#include <linux/console.h>
28#include <linux/delay.h>
29#include <linux/stringify.h>
30#include <linux/notifier.h>
31
32#include <asm/platform.h>
33#include <asm/bootparam.h>
34
35
36void __init platform_init(bp_tag_t* bootparam)
37{
38
39}
40
41void platform_halt(void)
42{
43 printk (" ** Called platform_halt(), looping forever! **\n");
44 while (1);
45}
46
47void platform_power_off(void)
48{
49 printk (" ** Called platform_power_off(), looping forever! **\n");
50 while (1);
51}
52void platform_restart(void)
53{
54 /* Flush and reset the mmu, simulate a processor reset, and
55 * jump to the reset vector. */
56
57 __asm__ __volatile__("movi a2, 15\n\t"
58 "wsr a2, " __stringify(ICOUNTLEVEL) "\n\t"
59 "movi a2, 0\n\t"
60 "wsr a2, " __stringify(ICOUNT) "\n\t"
61 "wsr a2, " __stringify(IBREAKENABLE) "\n\t"
62 "wsr a2, " __stringify(LCOUNT) "\n\t"
63 "movi a2, 0x1f\n\t"
64 "wsr a2, " __stringify(PS) "\n\t"
65 "isync\n\t"
66 "jx %0\n\t"
67 :
68 : "a" (XCHAL_RESET_VECTOR_VADDR)
69 : "a2");
70
71 /* control never gets here */
72}
73
74extern void iss_net_poll(void);
75
76const char twirl[]="|/-\\|/-\\";
77
78void platform_heartbeat(void)
79{
80#if 0
81 static int i = 0, j = 0;
82
83 if (--i < 0) {
84 i = 99;
85 printk("\r%c\r", twirl[j++]);
86 if (j == 8)
87 j = 0;
88 }
89#endif
90}
91
92
93
94static int
95iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
96{
97 __asm__ __volatile__("movi a2, -1; simcall\n");
98 return NOTIFY_DONE;
99}
100
101static struct notifier_block iss_panic_block = {
102 iss_panic_event,
103 NULL,
104 0
105};
106
107void __init platform_setup(char **p_cmdline)
108{
Alan Sterne041c682006-03-27 01:16:30 -0800109 atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
Chris Zankel7282bee2005-06-23 22:01:33 -0700110}