tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 * Copyright 2017 Cadence Design Systems Inc.
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 */
19#include <linux/bootmem.h>
20#include <linux/stddef.h>
21#include <linux/kernel.h>
22#include <linux/init.h>
23#include <linux/errno.h>
24#include <linux/reboot.h>
25#include <linux/kdev_t.h>
26#include <linux/types.h>
27#include <linux/major.h>
28#include <linux/blkdev.h>
29#include <linux/console.h>
30#include <linux/delay.h>
31#include <linux/stringify.h>
32#include <linux/notifier.h>
33
34#include <asm/platform.h>
35#include <asm/bootparam.h>
36#include <asm/setup.h>
37
38#include <platform/simcall.h>
39
40
41void __init platform_init(bp_tag_t* bootparam)
42{
43}
44
45void platform_halt(void)
46{
47 pr_info(" ** Called platform_halt() **\n");
48 simc_exit(0);
49}
50
51void platform_power_off(void)
52{
53 pr_info(" ** Called platform_power_off() **\n");
54 simc_exit(0);
55}
56void platform_restart(void)
57{
58 /* Flush and reset the mmu, simulate a processor reset, and
59 * jump to the reset vector. */
60 cpu_reset();
61 /* control never gets here */
62}
63
64void platform_heartbeat(void)
65{
66}
67
68static int
69iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
70{
71 simc_exit(1);
72 return NOTIFY_DONE;
73}
74
75static struct notifier_block iss_panic_block = {
76 .notifier_call = iss_panic_event,
77};
78
79void __init platform_setup(char **p_cmdline)
80{
81 int argc = simc_argc();
82 int argv_size = simc_argv_size();
83
84 if (argc > 1) {
85 void **argv = alloc_bootmem(argv_size);
86 char *cmdline = alloc_bootmem(argv_size);
87 int i;
88
89 cmdline[0] = 0;
90 simc_argv((void *)argv);
91
92 for (i = 1; i < argc; ++i) {
93 if (i > 1)
94 strcat(cmdline, " ");
95 strcat(cmdline, argv[i]);
96 }
97 *p_cmdline = cmdline;
98 }
99
100 atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
101}