1 /* 2 * (C) Copyright 2002 3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 4 * Marius Groeger <mgroeger@sysgo.de> 5 * 6 * (C) Copyright 2002 7 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> 8 * 9 * SPDX-License-Identifier: GPL-2.0+ 10 */ 11 12 /* 13 * CPU specific code 14 */ 15 16 #include <common.h> 17 #include <command.h> 18 #include <asm/system.h> 19 20 static void cache_flush(void); 21 22 int cleanup_before_linux (void) 23 { 24 /* 25 * this function is called just before we call linux 26 * it prepares the processor for linux 27 * 28 * we turn off caches etc ... 29 */ 30 31 disable_interrupts (); 32 33 /* turn off I/D-cache */ 34 icache_disable(); 35 dcache_disable(); 36 /* flush I/D-cache */ 37 cache_flush(); 38 39 return 0; 40 } 41 42 /* flush I/D-cache */ 43 static void cache_flush (void) 44 { 45 unsigned long i = 0; 46 47 asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); 48 } 49