diff options
Diffstat (limited to 'arch/m68k/mach-mcfv4e/mcf_reset_cpu.c')
-rw-r--r-- | arch/m68k/mach-mcfv4e/mcf_reset_cpu.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/m68k/mach-mcfv4e/mcf_reset_cpu.c b/arch/m68k/mach-mcfv4e/mcf_reset_cpu.c new file mode 100644 index 0000000000..5a3368f901 --- /dev/null +++ b/arch/m68k/mach-mcfv4e/mcf_reset_cpu.c @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2008 Carsten Schlote <c.schlote@konzeptpark.de> + * See file CREDITS for list of people who contributed to this project. + * + * This file is part of U-Boot V2. + * + * U-Boot V2 is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * U-Boot V2 is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with U-Boot V2. If not, see <http://www.gnu.org/licenses/>. + */ + +/** @file + * Implements a watchdog triggered reset for V4e Coldfire cores + */ +#include <common.h> +#include <asm/arch/mcf54xx-regs.h> + +/** + * Reset the cpu by setting up the watchdog timer and let it time out + */ +void reset_cpu (ulong ignored) +{ + while ( ignored ) { ; }; + + /* Disable watchdog and set Time-Out field to minimum timeout value */ + MCF_GPT_GMS0 = 0; + MCF_GPT_GCIR0 = MCF_GPT_GCIR_PRE(1) | MCF_GPT_GCIR_CNT(0xffff); + + /* Enable watchdog */ + MCF_GPT_GMS0 = MCF_GPT_GMS_OCPW(0xA5) | MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS_GPIO; + + while (1); + /*NOTREACHED*/ +} +EXPORT_SYMBOL(reset_cpu); + |