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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* arch/xtensa/platform-iss/setup.c
*
* Platform specific initialization.
*
* Authors: Chris Zankel <chris@zankel.net>
* Joe Taylor <joe@tensilica.com>
*
* Copyright 2001 - 2005 Tensilica Inc.
* Copyright 2017 Cadence Design Systems Inc.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/notifier.h>
#include <linux/panic_notifier.h>
#include <linux/printk.h>
#include <linux/reboot.h>
#include <linux/string.h>
#include <asm/platform.h>
#include <asm/setup.h>
#include <platform/simcall.h>
static int iss_power_off(struct sys_off_data *unused)
{
pr_info(" ** Called platform_power_off() **\n");
simc_exit(0);
return NOTIFY_DONE;
}
static int iss_restart(struct notifier_block *this,
unsigned long event, void *ptr)
{
/* Flush and reset the mmu, simulate a processor reset, and
* jump to the reset vector. */
cpu_reset();
return NOTIFY_DONE;
}
static struct notifier_block iss_restart_block = {
.notifier_call = iss_restart,
};
static int
iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
{
simc_exit(1);
return NOTIFY_DONE;
}
static struct notifier_block iss_panic_block = {
.notifier_call = iss_panic_event,
};
void __init platform_setup(char **p_cmdline)
{
static void *argv[COMMAND_LINE_SIZE / sizeof(void *)] __initdata;
static char cmdline[COMMAND_LINE_SIZE] __initdata;
int argc = simc_argc();
int argv_size = simc_argv_size();
if (argc > 1) {
if (argv_size > sizeof(argv)) {
pr_err("%s: command line too long: argv_size = %d\n",
__func__, argv_size);
} else {
int i;
cmdline[0] = 0;
simc_argv((void *)argv);
for (i = 1; i < argc; ++i) {
if (i > 1)
strcat(cmdline, " ");
strcat(cmdline, argv[i]);
}
*p_cmdline = cmdline;
}
}
atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
register_restart_handler(&iss_restart_block);
register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
SYS_OFF_PRIO_PLATFORM,
iss_power_off, NULL);
}
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