/*
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* Copyright (C) 2014 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/pstore_ram.h>
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#include "fiq_watchdog.h"
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#include "fiq_debugger_priv.h"
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static DEFINE_RAW_SPINLOCK(fiq_watchdog_lock);
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static void fiq_watchdog_printf(struct fiq_debugger_output *output,
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const char *fmt, ...)
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{
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char buf[256];
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va_list ap;
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int len;
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va_start(ap, fmt);
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len = vscnprintf(buf, sizeof(buf), fmt, ap);
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va_end(ap);
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ramoops_console_write_buf(buf, len);
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}
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struct fiq_debugger_output fiq_watchdog_output = {
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.printf = fiq_watchdog_printf,
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};
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void fiq_watchdog_triggered(const struct pt_regs *regs, void *svc_sp)
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{
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char msg[24];
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int len;
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raw_spin_lock(&fiq_watchdog_lock);
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len = scnprintf(msg, sizeof(msg), "watchdog fiq cpu %d\n",
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THREAD_INFO(svc_sp)->cpu);
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ramoops_console_write_buf(msg, len);
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fiq_debugger_dump_stacktrace(&fiq_watchdog_output, regs, 100, svc_sp);
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raw_spin_unlock(&fiq_watchdog_lock);
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}
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