smp.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- /*
- * Copyright (C) 2000, 2001 Broadcom Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- #include <linux/sched.h>
- #include <linux/smp.h>
- #include <asm/mipsregs.h>
- #include "cfe_xiocb.h"
- #include "cfe_api.h"
- #include "cfe_error.h"
- extern void asmlinkage smp_bootstrap(void);
- /* Boot all other cpus in the system, initialize them, and
- bring them into the boot fn */
- int prom_boot_secondary(int cpu, unsigned long sp, unsigned long gp)
- {
- int retval;
- retval = cfe_start_cpu(cpu, &smp_bootstrap, sp, gp, 0);
- if (retval != 0) {
- printk("cfe_start_cpu(%i) returned %in" , cpu, retval);
- return 0;
- } else {
- return 1;
- }
- }
- void prom_init_secondary(void)
- {
- /* Set up kseg0 to be cachable coherent */
- clear_cp0_config(CONF_CM_CMASK);
- set_cp0_config(0x5);
- /* Enable interrupts for lines 0-4 */
- clear_cp0_status(0xe000);
- set_cp0_status(0x1f01);
- }
- /*
- * Set up state, return the total number of cpus in the system, including
- * the master
- */
- int prom_setup_smp(void)
- {
- int i;
- int num_cpus = 1;
- /* Use CFE to find out how many CPUs are available */
- for (i=1; i<NR_CPUS; i++) {
- if (cfe_stop_cpu(i) == 0) {
- num_cpus++;
- }
- }
- printk("Detected %i available CPU(s)n", num_cpus);
- return num_cpus;
- }
- void prom_smp_finish(void)
- {
- extern void sb1250_smp_finish(void);
- sb1250_smp_finish();
- }