| // 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/memblock.h> |
| #include <linux/stddef.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/errno.h> |
| #include <linux/reboot.h> |
| #include <linux/kdev_t.h> |
| #include <linux/types.h> |
| #include <linux/major.h> |
| #include <linux/blkdev.h> |
| #include <linux/console.h> |
| #include <linux/delay.h> |
| #include <linux/stringify.h> |
| #include <linux/notifier.h> |
| |
| #include <asm/platform.h> |
| #include <asm/bootparam.h> |
| #include <asm/setup.h> |
| |
| #include <platform/simcall.h> |
| |
| |
| void __init platform_init(bp_tag_t* bootparam) |
| { |
| } |
| |
| void platform_halt(void) |
| { |
| pr_info(" ** Called platform_halt() **\n"); |
| simc_exit(0); |
| } |
| |
| void platform_power_off(void) |
| { |
| pr_info(" ** Called platform_power_off() **\n"); |
| simc_exit(0); |
| } |
| void platform_restart(void) |
| { |
| /* Flush and reset the mmu, simulate a processor reset, and |
| * jump to the reset vector. */ |
| cpu_reset(); |
| /* control never gets here */ |
| } |
| |
| void platform_heartbeat(void) |
| { |
| } |
| |
| 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); |
| } |