patch-2.4.19 linux-2.4.19/arch/ia64/sn/kernel/sn2/sn2_smp.c

• Lines: 185
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ia64/sn/kernel/sn2/sn2_smp.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ia64/sn/kernel/sn2/sn2_smp.c linux-2.4.19/arch/ia64/sn/kernel/sn2/sn2_smp.c
@@ -0,0 +1,184 @@
+/*
+ * SN2 Platform specific SMP Support
+ *
+ * Copyright (C) 2000-2002 Silicon Graphics, Inc. All rights reserved.
+ * 
+ * This program is free software; you can redistribute it and/or modify it 
+ * under the terms of version 2 of the GNU General Public License 
+ * as published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it would be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
+ * 
+ * Further, this software is distributed without any warranty that it is 
+ * free of the rightful claim of any third person regarding infringement 
+ * or the like.  Any license provided herein, whether implied or 
+ * otherwise, applies only to this software file.  Patent licenses, if 
+ * any, provided herein do not apply to combinations of this program with 
+ * other software, or any other product whatsoever.
+ * 
+ * You should have received a copy of the GNU General Public 
+ * License along with this program; if not, write the Free Software 
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ * 
+ * Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 
+ * Mountain View, CA  94043, or:
+ * 
+ * http://www.sgi.com 
+ * 
+ * For further information regarding this notice, see: 
+ * 
+ * http://oss.sgi.com/projects/GenInfo/NoticeExplan
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/threads.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/mmzone.h>
+
+#include <asm/processor.h>
+#include <asm/irq.h>
+#include <asm/sal.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/smp.h>
+#include <asm/hw_irq.h>
+#include <asm/current.h>
+#include <asm/sn/sn_cpuid.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/sn2/shub_mmr.h>
+
+/**
+ * sn2_global_tlb_purge - globally purge translation cache of virtual address range
+ * @start: start of virtual address range
+ * @end: end of virtual address range
+ * @nbits: specifies number of bytes to purge per instruction (num = 1<<(nbits & 0xfc))
+ *
+ * Purges the translation caches of all processors of the given virtual address
+ * range.
+ */
+void
+sn2_global_tlb_purge (unsigned long start, unsigned long end, unsigned long nbits)
+{
+	int		cnode, nasid;
+	volatile long	*ptc0, *ptc1, *piows;
+	unsigned long	ws, next, data0, data1;
+
+	piows = (long*)LOCAL_MMR_ADDR(get_slice() ? SH_PIO_WRITE_STATUS_1 : SH_PIO_WRITE_STATUS_0);
+	data0 = (1UL<<SH_PTC_0_A_SHFT) |
+		(nbits<<SH_PTC_0_PS_SHFT) |
+		((ia64_get_rr(start)>>8)<<SH_PTC_0_RID_SHFT) |
+		(1UL<<SH_PTC_0_START_SHFT);
+
+	ptc0 = (long*)GLOBAL_MMR_ADDR(0, SH_PTC_0);
+	ptc1 = (long*)GLOBAL_MMR_ADDR(0, SH_PTC_1);
+	do {
+		*(piows+1) = -1;	/* use alias address to clear bits*/
+		next = start;
+		do {
+			for (cnode = 0; cnode < numnodes; cnode++) {
+				nasid = cnodeid_to_nasid(cnode);
+				ptc0 = CHANGE_NASID(nasid, ptc0);
+				ptc1 = CHANGE_NASID(nasid, ptc1);
+				data1 = next | (1UL<<SH_PTC_1_START_SHFT);
+				*ptc0 = data0;
+				*ptc1 = data1;
+			}
+			next += (1UL << nbits);
+		} while (next < end);
+
+		while ((ws = *piows) & SH_PIO_WRITE_STATUS_0_PENDING_WRITE_COUNT_MASK)
+			;
+
+	} while (ws & SH_PIO_WRITE_STATUS_0_WRITE_DEADLOCK_MASK);
+
+	
+}
+
+/**
+ * sn_send_IPI_phys - send an IPI to a Nasid and slice
+ * @physid: physical cpuid to receive the interrupt.
+ * @vector: command to send
+ * @delivery_mode: delivery mechanism
+ *
+ * Sends an IPI (interprocessor interrupt) to the processor specified by
+ * @physid
+ *
+ * @delivery_mode can be one of the following
+ *
+ * %IA64_IPI_DM_INT - pend an interrupt
+ * %IA64_IPI_DM_PMI - pend a PMI
+ * %IA64_IPI_DM_NMI - pend an NMI
+ * %IA64_IPI_DM_INIT - pend an INIT interrupt
+ */
+void
+sn_send_IPI_phys(long physid, int vector, int delivery_mode)
+{
+	long		nasid, slice;
+	long		*p, val;
+
+	nasid = cpu_physical_id_to_nasid(physid);
+        slice = cpu_physical_id_to_slice(physid);
+
+	p = (long*)GLOBAL_MMR_ADDR(nasid, SH_IPI_INT);
+	val =   (1UL<<SH_IPI_INT_SEND_SHFT) | 
+		(physid<<SH_IPI_INT_PID_SHFT) | 
+	        ((long)delivery_mode<<SH_IPI_INT_TYPE_SHFT) | 
+		((long)vector<<SH_IPI_INT_IDX_SHFT) |
+		(0x000feeUL<<SH_IPI_INT_BASE_SHFT);
+
+#if defined(BRINGUP)
+	{
+	static int count=0;
+	if (count++ < 10) printk("ZZ sendIPI 0x%x vec %d, nasid 0x%lx, slice %ld, adr 0x%lx, val 0x%lx\n",
+		smp_processor_id(), vector, nasid, slice, (long)p, val);
+	}
+#endif
+	mb();
+	*p = val;
+	
+}
+
+/**
+ * sn2_send_IPI - send an IPI to a processor
+ * @cpuid: target of the IPI
+ * @vector: command to send
+ * @delivery_mode: delivery mechanism
+ * @redirect: redirect the IPI?
+ *
+ * Sends an IPI (InterProcessor Interrupt) to the processor specified by
+ * @cpuid.  @vector specifies the command to send, while @delivery_mode can 
+ * be one of the following
+ *
+ * %IA64_IPI_DM_INT - pend an interrupt
+ * %IA64_IPI_DM_PMI - pend a PMI
+ * %IA64_IPI_DM_NMI - pend an NMI
+ * %IA64_IPI_DM_INIT - pend an INIT interrupt
+ */
+void
+sn2_send_IPI(int cpuid, int vector, int delivery_mode, int redirect)
+{
+	long		physid;
+
+	physid = cpu_physical_id(cpuid);
+
+	sn_send_IPI_phys(physid, vector, delivery_mode);
+}
+
+
+/**
+ * init_sn2_smp_config - initialize SN2 smp configuration
+ *
+ * currently a NOP.
+ */
+void __init
+init_sn2_smp_config(void)
+{
+
+}