| 1 | /*
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| 2 | * Copyright (c) 2007 Martin Decky
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| 3 | * Copyright (c) 2001-2004 Jakub Jermar
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * - Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * - Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * - The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | */
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| 29 |
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| 30 | /** @addtogroup kernel_generic
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| 31 | * @{
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| 32 | */
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| 33 |
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| 34 | /**
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| 35 | * @file
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| 36 | * @brief Shutdown procedures.
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| 37 | */
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| 38 |
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| 39 | #include <shutdown.h>
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| 40 | #include <log.h>
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| 41 | #include <cpu.h>
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| 42 | #include <arch/asm.h>
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| 43 | #include <arch.h>
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| 44 | #include <console/kconsole.h>
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| 45 | #include <proc/task.h>
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| 46 |
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| 47 | /** Halt flag */
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| 48 | atomic_t haltstate = 0;
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| 49 |
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| 50 | /** Halt wrapper
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| 51 | *
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| 52 | * Set halt flag and halt the CPU.
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| 53 | *
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| 54 | */
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| 55 | void halt(void)
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| 56 | {
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| 57 | #if (defined(CONFIG_DEBUG)) && (defined(CONFIG_KCONSOLE))
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| 58 | bool rundebugger = false;
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| 59 |
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| 60 | if (!atomic_load(&haltstate)) {
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| 61 | atomic_store(&haltstate, 1);
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| 62 | rundebugger = true;
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| 63 | }
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| 64 | #else
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| 65 | atomic_store(&haltstate, 1);
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| 66 | #endif
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| 67 |
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| 68 | interrupts_disable();
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| 69 |
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| 70 | #if (defined(CONFIG_DEBUG)) && (defined(CONFIG_KCONSOLE))
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| 71 | if ((rundebugger) && (kconsole_check_poll()))
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| 72 | kconsole("panic", "\nLast resort kernel console ready.\n", false);
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| 73 | #endif
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| 74 |
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| 75 | if (CPU)
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| 76 | log(LF_OTHER, LVL_NOTE, "cpu%u: halted", CPU->id);
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| 77 | else
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| 78 | log(LF_OTHER, LVL_NOTE, "cpu: halted");
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| 79 |
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| 80 | cpu_halt();
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| 81 | }
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| 82 |
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| 83 | void reboot(void)
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| 84 | {
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| 85 | task_done();
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| 86 |
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| 87 | #ifdef CONFIG_DEBUG
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| 88 | log(LF_OTHER, LVL_DEBUG, "Rebooting the system");
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| 89 | #endif
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| 90 |
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| 91 | arch_reboot();
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| 92 | halt();
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| 93 | }
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| 94 |
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| 95 | /** @}
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| 96 | */
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