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 #include <asm/armv7.h> 39 40 void save_boot_params_default(u32 r0, u32 r1, u32 r2, u32 r3) 41 { 42 } 43 44 void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) 45 __attribute__((weak, alias("save_boot_params_default"))); 46 47 int cleanup_before_linux(void) 48 { 49 /* 50 * this function is called just before we call linux 51 * it prepares the processor for linux 52 * 53 * we turn off caches etc ... 54 */ 55 disable_interrupts(); 56 57 /* 58 * Turn off I-cache and invalidate it 59 */ 60 icache_disable(); 61 invalidate_icache_all(); 62 63 /* 64 * turn off D-cache 65 * dcache_disable() in turn flushes the d-cache and disables MMU 66 */ 67 dcache_disable(); 68 69 /* 70 * After D-cache is flushed and before it is disabled there may 71 * be some new valid entries brought into the cache. We are sure 72 * that these lines are not dirty and will not affect our execution. 73 * (because unwinding the call-stack and setting a bit in CP15 SCTRL 74 * is all we did during this. We have not pushed anything on to the 75 * stack. Neither have we affected any static data) 76 * So just invalidate the entire d-cache again to avoid coherency 77 * problems for kernel 78 */ 79 invalidate_dcache_all(); 80 81 return 0; 82 } 83