sn2_smp.c
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上传日期:2013-04-10
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- /*
- * 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%lxn",
- 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)
- {
- }