patch-2.1.23 linux/arch/sparc/ap1000/sync.c

• Lines: 56
• Date: Sun Jan 26 12:07:06 1997
• Orig file: v2.1.22/linux/arch/sparc/ap1000/sync.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.22/linux/arch/sparc/ap1000/sync.c linux/arch/sparc/ap1000/sync.c
@@ -0,0 +1,55 @@
+  /*
+   * Copyright 1996 The Australian National University.
+   * Copyright 1996 Fujitsu Laboratories Limited
+   * 
+   * This software may be distributed under the terms of the Gnu
+   * Public License version 2 or later
+  */
+/* sync functions using the Tnet */
+
+#include <asm/ap1000/apreg.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/tasks.h>
+
+extern int cap_cid0;
+extern unsigned _ncel, _ncelx, _ncely, _cid;
+
+static volatile int sync_flags[MPP_NUM_TASKS];
+
+
+int ap_sync(int numcells, int *phys_map)
+{
+	int basecell;
+	int i,err;
+	int tsk = current->taskid;
+	
+	if (numcells < 2) return 0;
+
+	if (!MPP_IS_PAR_TASK(tsk)) {
+		printk("nonparallel task %d called ap_sync\n",tsk);
+		return 0;
+	}
+	tsk -= MPP_TASK_BASE;
+	
+	basecell = phys_map[0];
+	if (cap_cid0 == basecell) {    
+		if ((err=wait_on_int(&sync_flags[tsk],numcells-1,5)))
+			return err;
+		sync_flags[tsk] = 0;
+		if (numcells == _ncel) {
+			ap_bput(0,0,0,&sync_flags[tsk],0);
+		} else {
+			for (i=1;i<numcells;i++)
+				ap_put(phys_map[i],0,0,0,&sync_flags[tsk],0);
+		}
+		return 0;
+	}
+	
+	ap_put(basecell,0,0,0,&sync_flags[tsk],0);
+	if ((err=wait_on_int(&sync_flags[tsk],1,5)))
+		return err;
+	sync_flags[tsk] = 0;
+	return 0;
+}
+