patch-2.4.20 linux-2.4.20/arch/ppc/kernel/chrp_smp.c

• Lines: 149
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.19/arch/ppc/kernel/chrp_smp.c
• Orig date: Mon Feb 25 11:37:55 2002

diff -urN linux-2.4.19/arch/ppc/kernel/chrp_smp.c linux-2.4.20/arch/ppc/kernel/chrp_smp.c
@@ -1,148 +0,0 @@
-/*
- * BK Id: %F% %I% %G% %U% %#%
- */
-/*
- * Smp support for CHRP machines.
- *
- * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great
- * deal of code from the sparc and intel versions.
- *
- * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
- *
- */
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
-#include <linux/delay.h>
-#define __KERNEL_SYSCALLS__
-#include <linux/unistd.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-
-#include <asm/ptrace.h>
-#include <asm/atomic.h>
-#include <asm/irq.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/hardirq.h>
-#include <asm/softirq.h>
-#include <asm/sections.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/smp.h>
-#include <asm/residual.h>
-#include <asm/time.h>
-
-#include "open_pic.h"
-
-extern unsigned long smp_chrp_cpu_nr;
-
-static int __init
-smp_chrp_probe(void)
-{
-	if (smp_chrp_cpu_nr > 1)
-		openpic_request_IPIs();
-
-	return smp_chrp_cpu_nr;
-}
-
-static void __init
-smp_chrp_kick_cpu(int nr)
-{
-	*(unsigned long *)KERNELBASE = nr;
-	asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
-}
-
-static void __init
-smp_chrp_setup_cpu(int cpu_nr)
-{
-	static atomic_t ready = ATOMIC_INIT(1);
-	static volatile int frozen = 0;
-
-	if (cpu_nr == 0) {
-		/* wait for all the others */
-		while (atomic_read(&ready) < smp_num_cpus)
-			barrier();
-		atomic_set(&ready, 1);
-		/* freeze the timebase */
-		call_rtas("freeze-time-base", 0, 1, NULL);
-		mb();
-		frozen = 1;
-		/* XXX assumes this is not a 601 */
-		set_tb(0, 0);
-		last_jiffy_stamp(0) = 0;
-		while (atomic_read(&ready) < smp_num_cpus)
-			barrier();
-		/* thaw the timebase again */
-		call_rtas("thaw-time-base", 0, 1, NULL);
-		mb();
-		frozen = 0;
-		smp_tb_synchronized = 1;
-	} else {
-		atomic_inc(&ready);
-		while (!frozen)
-			barrier();
-		set_tb(0, 0);
-		last_jiffy_stamp(0) = 0;
-		mb();
-		atomic_inc(&ready);
-		while (frozen)
-			barrier();
-	}
-
-	if (OpenPIC_Addr)
-		do_openpic_setup_cpu();
-}
-
-#ifdef CONFIG_POWER4
-static void __chrp
-smp_xics_message_pass(int target, int msg, unsigned long data, int wait)
-{
-	/* for now, only do reschedule messages
-	   since we only have one IPI */
-	if (msg != PPC_MSG_RESCHEDULE)
-		return;
-	for (i = 0; i < smp_num_cpus; ++i) {
-		if (target == MSG_ALL || target == i
-		    || (target == MSG_ALL_BUT_SELF
-			&& i != smp_processor_id()))
-			xics_cause_IPI(i);
-	}
-}
-
-static int __chrp
-smp_xics_probe(void)
-{
-	return smp_chrp_cpu_nr;
-}
-
-static void __chrp
-smp_xics_setup_cpu(int cpu_nr)
-{
-	if (cpu_nr > 0)
-		xics_setup_cpu();
-}
-#endif /* CONFIG_POWER4 */
-
-/* CHRP with openpic */
-struct smp_ops_t chrp_smp_ops __chrpdata = {
-	smp_openpic_message_pass,
-	smp_chrp_probe,
-	smp_chrp_kick_cpu,
-	smp_chrp_setup_cpu,
-};
-
-#ifdef CONFIG_POWER4
-/* CHRP with new XICS interrupt controller */
-struct smp_ops_t xics_smp_ops __chrpdata = {
-	smp_xics_message_pass,
-	smp_xics_probe,
-	smp_chrp_kick_cpu,
-	smp_xics_setup_cpu,
-};
-#endif /* CONFIG_POWER4 */