1/*
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 */
18#include <linux/stddef.h>
19#include <linux/kernel.h>
20#include <linux/init.h>
21#include <linux/errno.h>
22#include <linux/reboot.h>
23#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	pr_info(" ** Called platform_halt() **\n");
44	__asm__ __volatile__("movi a2, 1\nsimcall\n");
45}
46
47void platform_power_off(void)
48{
49	pr_info(" ** Called platform_power_off() **\n");
50	__asm__ __volatile__("movi a2, 1\nsimcall\n");
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, icountlevel\n\t"
59			     "movi	a2, 0\n\t"
60			     "wsr	a2, icount\n\t"
61#if XCHAL_NUM_IBREAK > 0
62			     "wsr	a2, ibreakenable\n\t"
63#endif
64			     "wsr	a2, lcount\n\t"
65			     "movi	a2, 0x1f\n\t"
66			     "wsr	a2, ps\n\t"
67			     "isync\n\t"
68			     "jx	%0\n\t"
69			     :
70			     : "a" (XCHAL_RESET_VECTOR_VADDR)
71			     : "a2");
72
73	/* control never gets here */
74}
75
76extern void iss_net_poll(void);
77
78const char twirl[]="|/-\\|/-\\";
79
80void platform_heartbeat(void)
81{
82#if 0
83	static int i = 0, j = 0;
84
85	if (--i < 0) {
86		i = 99;
87		printk("\r%c\r", twirl[j++]);
88		if (j == 8)
89			j = 0;
90	}
91#endif
92}
93
94
95
96static int
97iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
98{
99	__asm__ __volatile__("movi a2, -1; simcall\n");
100	return NOTIFY_DONE;
101}
102
103static struct notifier_block iss_panic_block = {
104	iss_panic_event,
105	NULL,
106	0
107};
108
109void __init platform_setup(char **p_cmdline)
110{
111	atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
112}
113