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3977403642
In addition to ASSERT(), it might be useful to panic() sometimes, so add a tidy way of doing it which will print a message and reset. BUG=chrome-os-partner:10149 TEST=manual Build a special version for snow where the 'rw' command calls panic() See that a message is produced: > rw 0 read 0x0 = 0x20001048 ** PANIC: Address is 0 Change-Id: I4512c0193f4c1d52d0c256b2deefacf551056fd9 Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/25413
89 lines
2.5 KiB
C
89 lines
2.5 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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* Panic handling, including displaying a message on the panic reporting
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* device, which is currently the UART.
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*/
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#ifndef __PANIC_H
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#include <stdarg.h>
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/**
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* Write a character to the panic reporting device
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*
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* This function will not return until the character has left the UART
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* data register. Any previously queued UART traffic is displayed first.
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*
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* @param ch Character to write
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*/
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void panic_putc(int ch);
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/**
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* Write a string to the panic reporting device
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*
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* This function will not return until the string has left the UART
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* data register. Any previously queued UART traffic is displayed first.
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*
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* @param ch Character to write
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*/
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void panic_puts(const char *s);
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/**
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* Very basic vprintf() for use in panic situations
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*
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* We only support %s and %nx where n is the number of hex digits to display.
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* Currently we don't even support %d, and it is aimed at small code size.
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*
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* TODO(sjg@chromium.org): Really what we need is a vsnprintf() that is
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* shared between the console UART and panic (and is also available as an
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* snprintf()). The only downside is that we would then require a large
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* printf() implementation to be always present, whereas presumably now we
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* can turn it off.
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*
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* @param format printf-style format string
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* @param args List of arguments to process
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*/
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void panic_vprintf(const char *format, va_list args);
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/**
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* Very basic printf() for use in panic situations
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*
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* See panic_vprintf() for full details
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*
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* @param format printf-style format string
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* @param ... Arguments to process
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*/
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void panic_printf(const char *format, ...);
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/**
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* Report an assertion failure and reset
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*
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* @param msg Assertion expression or other message
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* @param func Function name where assertion happened
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* @param fname File name where assertion happened
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* @param linenum Line number where assertion happened
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*/
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void panic_assert_fail(const char *msg, const char *func, const char *fname,
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int linenum);
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/**
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* Display a panic message and reset
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*
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* @param msg Panic message
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*/
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void panic(const char *msg);
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/**
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* Report a panic to the panic reporting device
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*
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* This is exported only to permit use from assembler.
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*
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* @param msg Panic message
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* @param lregs Registers from the exception: psp, ipsr, lr, r4-r11
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*/
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void report_panic(const char *msg, uint32_t *lregs);
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#endif
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