1/* 2 * JBS Specific board startup routines. 3 * 4 * Copyright 2005, Embedded Alley Solutions, Inc 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 * 11 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 12 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 14 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 15 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 16 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 17 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 18 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 19 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 20 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 21 * 22 * You should have received a copy of the GNU General Public License along 23 * with this program; if not, write to the Free Software Foundation, Inc., 24 * 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26#include <linux/init.h> 27#include <linux/sched.h> 28#include <linux/ioport.h> 29#include <linux/mm.h> 30#include <linux/console.h> 31#include <linux/mc146818rtc.h> 32#include <linux/delay.h> 33 34#include <asm/cpu.h> 35#include <asm/bootinfo.h> 36#include <asm/irq.h> 37#include <asm/mipsregs.h> 38#include <asm/reboot.h> 39#include <asm/pgtable.h> 40 41#include <glb.h> 42 43/* CP0 hazard avoidance. */ 44#define BARRIER __asm__ __volatile__(".set noreorder\n\t" \ 45 "nop; nop; nop; nop; nop; nop;\n\t" \ 46 ".set reorder\n\t") 47 48void __init board_setup(void) 49{ 50 unsigned long config0, configpr; 51 52 config0 = read_c0_config(); 53 54 /* clear all three cache coherency fields */ 55 config0 &= ~(0x7 | (7<<25) | (7<<28)); 56 config0 |= (CONF_CM_DEFAULT | (CONF_CM_DEFAULT<<25) | 57 (CONF_CM_DEFAULT<<28)); 58 write_c0_config(config0); 59 BARRIER; 60 61 configpr = read_c0_config7(); 62 configpr |= (1<<19); /* enable tlb */ 63 write_c0_config7(configpr); 64 BARRIER; 65} 66