160d2ed0ba
pstore is a persistent storage filesystem used for RAMOOPS. It is used to store console logs, panics, ftrace and other information in case of a crash/panic/oops/reboot. pstore is implemented for barebox as a read-only filesystem at the moment. It may be extended later on. The idea is to provide a way to extract essential data from the last running kernel. Most of the code is copied from the kernel. However this is only a lightweight implementation without real write support yet. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
154 lines
3.5 KiB
C
154 lines
3.5 KiB
C
/*
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* (C) Copyright 2002-2006
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifdef CONFIG_DEBUG_INITCALLS
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#define DEBUG
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#endif
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/**
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* @file
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* @brief Main entry into the C part of barebox
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*/
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#include <common.h>
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#include <init.h>
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#include <command.h>
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#include <malloc.h>
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#include <debug_ll.h>
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#include <fs.h>
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#include <errno.h>
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#include <linux/stat.h>
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#include <envfs.h>
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#include <asm/sections.h>
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#include <uncompress.h>
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#include <globalvar.h>
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extern initcall_t __barebox_initcalls_start[], __barebox_early_initcalls_end[],
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__barebox_initcalls_end[];
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extern exitcall_t __barebox_exitcalls_start[], __barebox_exitcalls_end[];
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#if defined CONFIG_FS_RAMFS && defined CONFIG_FS_DEVFS
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static int mount_root(void)
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{
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mount("none", "ramfs", "/", NULL);
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mkdir("/dev", 0);
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mount("none", "devfs", "/dev", NULL);
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if (IS_ENABLED(CONFIG_FS_EFIVARFS)) {
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mkdir("/efivars", 0);
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mount("none", "efivarfs", "/efivars", NULL);
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}
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if (IS_ENABLED(CONFIG_FS_PSTORE)) {
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mkdir("/pstore", 0);
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mount("none", "pstore", "/pstore", NULL);
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}
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return 0;
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}
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fs_initcall(mount_root);
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#endif
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#ifdef CONFIG_ENV_HANDLING
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static int load_environment(void)
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{
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const char *default_environment_path;
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default_environment_path = default_environment_path_get();
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if (IS_ENABLED(CONFIG_DEFAULT_ENVIRONMENT))
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defaultenv_load("/env", 0);
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envfs_load(default_environment_path, "/env", 0);
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nvvar_load();
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return 0;
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}
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environment_initcall(load_environment);
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#endif
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int (*barebox_main)(void);
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void __noreturn start_barebox(void)
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{
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initcall_t *initcall;
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int result;
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struct stat s;
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if (!IS_ENABLED(CONFIG_SHELL_NONE))
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barebox_main = run_shell;
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for (initcall = __barebox_initcalls_start;
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initcall < __barebox_initcalls_end; initcall++) {
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pr_debug("initcall-> %pS\n", *initcall);
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result = (*initcall)();
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if (result)
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pr_err("initcall %pS failed: %s\n", *initcall,
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strerror(-result));
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}
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pr_debug("initcalls done\n");
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if (IS_ENABLED(CONFIG_COMMAND_SUPPORT)) {
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pr_info("running /env/bin/init...\n");
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if (!stat("/env/bin/init", &s))
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run_command("source /env/bin/init");
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else
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pr_err("/env/bin/init not found\n");
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}
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if (!barebox_main) {
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pr_err("No main function! aborting.\n");
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hang();
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}
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/* main_loop() can return to retry autoboot, if so just run it again. */
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for (;;)
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barebox_main();
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/* NOTREACHED - no way out of command loop except booting */
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}
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void __noreturn hang (void)
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{
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puts ("### ERROR ### Please RESET the board ###\n");
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for (;;);
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}
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/* Everything needed to cleanly shutdown barebox.
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* Should be called before starting an OS to get
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* the devices into a clean state
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*/
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void shutdown_barebox(void)
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{
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exitcall_t *exitcall;
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for (exitcall = __barebox_exitcalls_start;
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exitcall < __barebox_exitcalls_end; exitcall++) {
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pr_debug("exitcall-> %pS\n", *exitcall);
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(*exitcall)();
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}
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}
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