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0037fb8dfc
For debug, in common code let's log the watchdog PC and task id as our SW panic params. BUG=chromium:790006 BRANCH=none TEST=manually test scarlet rev2 from a1-a3, b1-b2: (a1) Add 'while(1);' in button ISR (a2) Boot and press the button (a3) When watchdog is triggeried, check with 'panicinfo' that saved R5 is the PC for button ISR. (b1) 'crash watchdog' in EC console (b2) Check with 'panicinfo' that CONSOLE task id is saved in EXCEPTION and PC is saved in R5. Change-Id: I64d2fcf594dd24b0951e002ab8e80ebcac2d1def Signed-off-by: Philip Chen <philipchen@google.com> Reviewed-on: https://chromium-review.googlesource.com/803618 Commit-Ready: Philip Chen <philipchen@chromium.org> Tested-by: Philip Chen <philipchen@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Watchdog common code */
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#include "common.h"
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#include "panic.h"
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#include "task.h"
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#include "timer.h"
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#include "watchdog.h"
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void __keep watchdog_trace(uint32_t excep_lr, uint32_t excep_sp)
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{
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uint32_t psp;
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uint32_t *stack;
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asm("mrs %0, psp" : "=r"(psp));
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if ((excep_lr & 0xf) == 1) {
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/* we were already in exception context */
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stack = (uint32_t *)excep_sp;
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} else {
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/* we were in task context */
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stack = (uint32_t *)psp;
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}
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panic_set_reason(PANIC_SW_WATCHDOG, stack[6],
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(excep_lr & 0xf) == 1 ? 0xff : task_get_current());
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panic_printf("### WATCHDOG PC=%08x / LR=%08x / pSP=%08x ",
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stack[6], stack[5], psp);
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if ((excep_lr & 0xf) == 1)
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panic_puts("(exc) ###\n");
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else
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panic_printf("(task %d) ###\n", task_get_current());
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/* If we are blocked in a high priority IT handler, the following debug
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* messages might not appear but they are useless in that situation. */
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timer_print_info();
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task_print_list();
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}
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