| Jean-Christophe PLAGNIOL-VILLARD | 0134c31 | 2009-05-15 23:45:22 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2002 |
| 3 | * Lineo, Inc. <www.lineo.com> |
| 4 | * Bernhard Kuhn <bkuhn@lineo.com> |
| 5 | * |
| 6 | * (C) Copyright 2002 |
| 7 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| 8 | * Marius Groeger <mgroeger@sysgo.de> |
| 9 | * |
| 10 | * (C) Copyright 2002 |
| 11 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| 12 | * Alex Zuepke <azu@sysgo.de> |
| 13 | * |
| 14 | * See file CREDITS for list of people who contributed to this |
| 15 | * project. |
| 16 | * |
| 17 | * This program is free software; you can redistribute it and/or |
| 18 | * modify it under the terms of the GNU General Public License as |
| 19 | * published by the Free Software Foundation; either version 2 of |
| 20 | * the License, or (at your option) any later version. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, |
| 23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 25 | * GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License |
| 28 | * along with this program; if not, write to the Free Software |
| 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 30 | * MA 02111-1307 USA |
| 31 | */ |
| 32 | |
| 33 | #include <common.h> |
| 34 | #include <asm/arch/hardware.h> |
| 35 | |
| 36 | void board_reset(void) __attribute__((__weak__)); |
| 37 | |
| 38 | /* |
| 39 | * Reset the cpu by setting up the watchdog timer and let him time out |
| 40 | * or toggle a GPIO pin on the AT91RM9200DK board |
| 41 | */ |
| 42 | void reset_cpu (ulong ignored) |
| 43 | { |
| 44 | |
| 45 | #if defined(CONFIG_AT91RM9200_USART) |
| 46 | /*shutdown the console to avoid strange chars during reset */ |
| 47 | serial_exit(); |
| 48 | #endif |
| 49 | |
| 50 | if (board_reset) |
| 51 | board_reset(); |
| 52 | |
| 53 | /* this is the way Linux does it */ |
| 54 | |
| 55 | /* FIXME: |
| 56 | * These defines should be moved into |
| 57 | * include/asm-arm/arch-at91rm9200/AT91RM9200.h |
| 58 | * as soon as the whitespace fix gets applied. |
| 59 | */ |
| 60 | #define AT91C_ST_RSTEN (0x1 << 16) |
| 61 | #define AT91C_ST_EXTEN (0x1 << 17) |
| 62 | #define AT91C_ST_WDRST (0x1 << 0) |
| 63 | #define ST_WDMR *((unsigned long *)0xfffffd08) /* watchdog mode register */ |
| 64 | #define ST_CR *((unsigned long *)0xfffffd00) /* system clock control register */ |
| 65 | |
| 66 | ST_WDMR = AT91C_ST_RSTEN | AT91C_ST_EXTEN | 1 ; |
| 67 | ST_CR = AT91C_ST_WDRST; |
| 68 | |
| 69 | while (1); |
| 70 | /* Never reached */ |
| 71 | } |