1 /* 2 * (C) Copyright 2008 Texas Insturments 3 * 4 * (C) Copyright 2002 5 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 6 * Marius Groeger <mgroeger@sysgo.de> 7 * 8 * (C) Copyright 2002 9 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> 10 * 11 * See file CREDITS for list of people who contributed to this 12 * project. 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License as 16 * published by the Free Software Foundation; either version 2 of 17 * the License, or (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 27 * MA 02111-1307 USA 28 */ 29 30 /* 31 * CPU specific code 32 */ 33 34 #include <common.h> 35 #include <command.h> 36 #include <asm/system.h> 37 #include <asm/cache.h> 38 #ifndef CONFIG_L2_OFF 39 #include <asm/arch/sys_proto.h> 40 #endif 41 42 static void cache_flush(void); 43 44 int cleanup_before_linux(void) 45 { 46 unsigned int i; 47 48 /* 49 * this function is called just before we call linux 50 * it prepares the processor for linux 51 * 52 * we turn off caches etc ... 53 */ 54 disable_interrupts(); 55 56 /* turn off I/D-cache */ 57 icache_disable(); 58 dcache_disable(); 59 60 /* invalidate I-cache */ 61 cache_flush(); 62 63 #ifndef CONFIG_L2_OFF 64 /* turn off L2 cache */ 65 l2_cache_disable(); 66 /* invalidate L2 cache also */ 67 invalidate_dcache(get_device_type()); 68 #endif 69 i = 0; 70 /* mem barrier to sync up things */ 71 asm("mcr p15, 0, %0, c7, c10, 4": :"r"(i)); 72 73 #ifndef CONFIG_L2_OFF 74 l2_cache_enable(); 75 #endif 76 77 return 0; 78 } 79 80 static void cache_flush(void) 81 { 82 asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (0)); 83 } 84