1/* 2 * (C) Copyright 2004 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 <s3c6400.h> 37#include <asm/system.h> 38 39static void cache_flush (void); 40 41int cleanup_before_linux (void) 42{ 43 /* 44 * this function is called just before we call linux 45 * it prepares the processor for linux 46 * 47 * we turn off caches etc ... 48 */ 49 50 disable_interrupts (); 51 52 /* turn off I/D-cache */ 53 icache_disable(); 54 dcache_disable(); 55 /* flush I/D-cache */ 56 cache_flush(); 57 58 return 0; 59} 60 61/* flush I/D-cache */ 62static void cache_flush (void) 63{ 64 /* invalidate both caches and flush btb */ 65 asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (0)); 66 /* mem barrier to sync things */ 67 asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (0)); 68} 69