firmware/panic.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by wavey@wavey.org
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "config.h"
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #include <string.h>
  26 #include "panic.h"
  27 #include "lcd.h"
  28 #include "font.h"
  29 #include "debug.h"
  30 #include "led.h"
  31 #include "power.h"
  32 #include "system.h"
  33
  34 #if defined(CPU_ARM)
  35 #include "gcc_extensions.h"
  36 #include <backtrace.h>
  37 #endif
  38
  39 static char panic_buf[128];
  40 #define LINECHARS (LCD_WIDTH/SYSFONT_WIDTH) - 2
  41
  42 #if defined(CPU_ARM)
  43 void panicf_f( const char *fmt, ...);
  44
  45 /* we wrap panicf() here with naked function to catch SP value */
  46 void panicf( const char *fmt, ...)
  47 {
  48     (void)fmt;
  49     asm volatile ("mov r4, sp \n"
  50                   "b panicf_f \n"
  51                  );
  52 }
  53
  54 /*
  55  * "Dude. This is pretty fucked-up, right here."
  56  */
  57 void panicf_f( const char *fmt, ...)
  58 {
  59     int sp;
  60
  61     asm volatile ("mov %[SP],r4 \n"
  62                   : [SP] "=r" (sp)
  63                  );
  64
  65     int pc = (int)__builtin_return_address(0);
  66 #else
  67 void panicf( const char *fmt, ...)
  68 {
  69 #endif
  70     va_list ap;
  71
  72 #if (CONFIG_PLATFORM & PLATFORM_NATIVE)
  73     /* Disable interrupts */
  74 #ifdef CPU_ARM
  75     disable_interrupt(IRQ_FIQ_STATUS);
  76 #else
  77     set_irq_level(DISABLE_INTERRUPTS);
  78 #endif
  79 #endif /* SIMULATOR */
  80
  81     va_start( ap, fmt );
  82     vsnprintf( panic_buf, sizeof(panic_buf), fmt, ap );
  83     va_end( ap );
  84
  85     lcd_set_viewport(NULL);
  86
  87 #ifdef HAVE_LCD_CHARCELLS
  88     lcd_double_height(false);
  89     lcd_puts(0, 0, "*PANIC*");
  90     lcd_puts(0, 1, panic_buf);
  91 #elif defined(HAVE_LCD_BITMAP)
  92     int y = 1;
  93
  94 #if LCD_DEPTH > 1
  95     lcd_set_backdrop(NULL);
  96     lcd_set_drawmode(DRMODE_SOLID);
  97     lcd_set_foreground(LCD_BLACK);
  98     lcd_set_background(LCD_WHITE);
  99 #endif
 100
 101     lcd_clear_display();
 102     lcd_setfont(FONT_SYSFIXED);
 103     lcd_puts(1, y++, (unsigned char *)"*PANIC*");
 104     {
 105         /* wrap panic line */
 106         int i, len = strlen(panic_buf);
 107         for (i=0; i<len; i+=LINECHARS) {
 108             unsigned char c = panic_buf[i+LINECHARS];
 109             panic_buf[i+LINECHARS] = 0;
 110             lcd_puts(1, y++, (unsigned char *)panic_buf+i);
 111             panic_buf[i+LINECHARS] = c;
 112         }
 113     }
 114
 115 #if defined(CPU_ARM)
 116     backtrace(pc, sp, &y);
 117 #endif
 118 #else
 119     /* no LCD */
 120 #endif
 121
 122     lcd_update();
 123     DEBUGF("%s", panic_buf);
 124
 125     set_cpu_frequency(0);
 126
 127 #ifdef HAVE_ATA_POWER_OFF
 128     ide_power_enable(false);
 129 #endif
 130
 131     system_exception_wait(); /* if this returns, try to reboot */
 132     system_reboot();
 133     while (1);       /* halt */
 134 }