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

• Lines: 83
• Date: Sun Jan 26 12:07:06 1997
• Orig file: v2.1.22/linux/arch/sparc/ap1000/mpp.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.22/linux/arch/sparc/ap1000/mpp.c linux/arch/sparc/ap1000/mpp.c
@@ -0,0 +1,82 @@
+  /*
+   * 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
+  */
+/*
+ * simple mpp functions for the AP+
+ */
+
+#include <asm/ap1000/apreg.h>
+#include <asm/ap1000/apservice.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <asm/pgtable.h>
+
+extern int cap_cid0;
+extern int cap_ncel0;
+extern struct cap_init cap_init;
+
+static volatile int mpp_current_task = 0;
+static int gang_factor = DEF_GANG_FACTOR;
+static int last_task = 0;
+
+
+void mpp_schedule(struct cap_request *req)
+{
+	mpp_current_task = req->data[0];
+	need_resched = 1;
+	mark_bh(TQUEUE_BH);
+}
+
+
+void mpp_notify_schedule(struct task_struct *tsk)
+{
+	last_task = tsk->taskid;
+
+	msc_switch_check(tsk);
+
+	if (gang_factor == 0) return;
+
+	if (cap_cid0 == cap_init.bootcid && 
+	    mpp_current_task != tsk->taskid) {
+		struct cap_request req;
+
+		mpp_current_task = tsk->taskid;
+	
+		req.cid = mpp_cid();
+		req.type = REQ_SCHEDULE;
+		req.size = sizeof(req);
+ 		req.header = MAKE_HEADER(-1);
+		req.data[0] = mpp_current_task;
+		
+		bif_queue(&req,NULL,0);
+	}
+}
+
+
+int mpp_weight(struct task_struct *tsk)
+{
+	extern int block_parallel_tasks;
+
+	if (!MPP_IS_PAR_TASK(tsk->taskid)) return 0;
+
+	if (block_parallel_tasks) return -1000;
+
+	if (last_task && last_task != tsk->taskid && task[last_task] &&
+	    !msc_switch_ok()) return -1000;
+
+	if (cap_cid0 != cap_init.bootcid &&
+	    tsk->taskid != mpp_current_task) {
+		return -gang_factor;
+	}
+	return 0;
+}
+
+void mpp_set_gang_factor(int factor)
+{
+	gang_factor = factor;
+}