dcad47fc42
The ancient ppcdebug/PPCDBG mechanism is now only used in two places. First, in the hash setup code, one of the bits allows the size of the hash table to be reduced by a factor of 8 - which would be better accomplished with a command line option for that purpose. The other was a bunch of bus walking related messages in the iSeries code, which would seem to be insufficient reason to keep the mechanism. This patch removes the last traces of this mechanism. Built and booted on iSeries and pSeries POWER5 LPAR (ARCH=powerpc). Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/*
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* SMP support for iSeries machines.
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*
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* Dave Engebretsen, Peter Bergner, and
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* Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
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*
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* Plus various changes from other IBM teams...
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/interrupt.h>
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#include <linux/kernel_stat.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include <linux/cache.h>
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#include <linux/err.h>
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#include <linux/sysdev.h>
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#include <linux/cpu.h>
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#include <asm/ptrace.h>
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#include <asm/atomic.h>
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#include <asm/irq.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/paca.h>
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#include <asm/iseries/hv_call.h>
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#include <asm/time.h>
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#include <asm/machdep.h>
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#include <asm/cputable.h>
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#include <asm/system.h>
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static unsigned long iSeries_smp_message[NR_CPUS];
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void iSeries_smp_message_recv(struct pt_regs *regs)
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{
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int cpu = smp_processor_id();
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int msg;
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if (num_online_cpus() < 2)
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return;
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for (msg = 0; msg < 4; msg++)
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if (test_and_clear_bit(msg, &iSeries_smp_message[cpu]))
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smp_message_recv(msg, regs);
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}
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static inline void smp_iSeries_do_message(int cpu, int msg)
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{
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set_bit(msg, &iSeries_smp_message[cpu]);
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HvCall_sendIPI(&(paca[cpu]));
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}
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static void smp_iSeries_message_pass(int target, int msg)
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{
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int i;
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if (target < NR_CPUS)
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smp_iSeries_do_message(target, msg);
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else {
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for_each_online_cpu(i) {
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if ((target == MSG_ALL_BUT_SELF) &&
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(i == smp_processor_id()))
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continue;
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smp_iSeries_do_message(i, msg);
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}
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}
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}
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static int smp_iSeries_probe(void)
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{
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return cpus_weight(cpu_possible_map);
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}
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static void smp_iSeries_kick_cpu(int nr)
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{
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BUG_ON((nr < 0) || (nr >= NR_CPUS));
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/* Verify that our partition has a processor nr */
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if (paca[nr].lppaca.dyn_proc_status >= 2)
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return;
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/* The processor is currently spinning, waiting
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* for the cpu_start field to become non-zero
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* After we set cpu_start, the processor will
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* continue on to secondary_start in iSeries_head.S
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*/
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paca[nr].cpu_start = 1;
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}
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static void __devinit smp_iSeries_setup_cpu(int nr)
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{
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}
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static struct smp_ops_t iSeries_smp_ops = {
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.message_pass = smp_iSeries_message_pass,
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.probe = smp_iSeries_probe,
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.kick_cpu = smp_iSeries_kick_cpu,
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.setup_cpu = smp_iSeries_setup_cpu,
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};
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/* This is called very early. */
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void __init smp_init_iSeries(void)
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{
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smp_ops = &iSeries_smp_ops;
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}
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