patch-2.4.20 linux-2.4.20/arch/mips/sibyte/cfe/smp.c

• Lines: 80
• Date: Thu Nov 28 15:53:10 2002
• Orig file: linux-2.4.19/arch/mips/sibyte/cfe/smp.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/arch/mips/sibyte/cfe/smp.c linux-2.4.20/arch/mips/sibyte/cfe/smp.c
@@ -0,0 +1,79 @@
+/*
+ * 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 %i\n" , 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();
+}