1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * (C) Copyright 2002 3*4882a593Smuzhiyun * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 4*4882a593Smuzhiyun * Marius Groeger <mgroeger@sysgo.de> 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * (C) Copyright 2002 7*4882a593Smuzhiyun * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun /* 13*4882a593Smuzhiyun * CPU specific code 14*4882a593Smuzhiyun */ 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #include <common.h> 17*4882a593Smuzhiyun #include <command.h> 18*4882a593Smuzhiyun #include <asm/system.h> 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun static void cache_flush(void); 21*4882a593Smuzhiyun cleanup_before_linux(void)22*4882a593Smuzhiyunint cleanup_before_linux (void) 23*4882a593Smuzhiyun { 24*4882a593Smuzhiyun /* 25*4882a593Smuzhiyun * this function is called just before we call linux 26*4882a593Smuzhiyun * it prepares the processor for linux 27*4882a593Smuzhiyun * 28*4882a593Smuzhiyun * we turn off caches etc ... 29*4882a593Smuzhiyun */ 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun disable_interrupts (); 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun /* turn off I/D-cache */ 34*4882a593Smuzhiyun icache_disable(); 35*4882a593Smuzhiyun dcache_disable(); 36*4882a593Smuzhiyun /* flush I/D-cache */ 37*4882a593Smuzhiyun cache_flush(); 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun return 0; 40*4882a593Smuzhiyun } 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun /* flush I/D-cache */ cache_flush(void)43*4882a593Smuzhiyunstatic void cache_flush (void) 44*4882a593Smuzhiyun { 45*4882a593Smuzhiyun unsigned long i = 0; 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); 48*4882a593Smuzhiyun } 49