Pull release into acpica branch

1 files changed, 0 insertions, 517 deletions

diff --git a/arch/ppc64/kernel/pSeries_smp.c b/arch/ppc64/kernel/pSeries_smp.c
deleted file mode 100644
index d2c7e2c4733..00000000000
--- a/arch/ppc64/kernel/pSeries_smp.c
+++ /dev/null
@@ -1,517 +0,0 @@
-/*
- * SMP support for pSeries and BPA machines.
- *
- * Dave Engebretsen, Peter Bergner, and
- * Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
- *
- * Plus various changes from other IBM teams...
- *
- *      This program is free software; you can redistribute it and/or
- *      modify it under the terms of the GNU General Public License
- *      as published by the Free Software Foundation; either version
- *      2 of the License, or (at your option) any later version.
- */
-
-#undef DEBUG
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/cache.h>
-#include <linux/err.h>
-#include <linux/sysdev.h>
-#include <linux/cpu.h>
-
-#include <asm/ptrace.h>
-#include <asm/atomic.h>
-#include <asm/irq.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/smp.h>
-#include <asm/paca.h>
-#include <asm/time.h>
-#include <asm/machdep.h>
-#include <asm/xics.h>
-#include <asm/cputable.h>
-#include <asm/firmware.h>
-#include <asm/system.h>
-#include <asm/rtas.h>
-#include <asm/plpar_wrappers.h>
-#include <asm/pSeries_reconfig.h>
-
-#include "mpic.h"
-#include "bpa_iic.h"
-
-#ifdef DEBUG
-#define DBG(fmt...) udbg_printf(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-/*
- * The primary thread of each non-boot processor is recorded here before
- * smp init.
- */
-static cpumask_t of_spin_map;
-
-extern void pSeries_secondary_smp_init(unsigned long);
-
-#ifdef CONFIG_HOTPLUG_CPU
-
-/* Get state of physical CPU.
- * Return codes:
- *	0	- The processor is in the RTAS stopped state
- *	1	- stop-self is in progress
- *	2	- The processor is not in the RTAS stopped state
- *	-1	- Hardware Error
- *	-2	- Hardware Busy, Try again later.
- */
-static int query_cpu_stopped(unsigned int pcpu)
-{
-	int cpu_status;
-	int status, qcss_tok;
-
-	qcss_tok = rtas_token("query-cpu-stopped-state");
-	if (qcss_tok == RTAS_UNKNOWN_SERVICE)
-		return -1;
-	status = rtas_call(qcss_tok, 1, 2, &cpu_status, pcpu);
-	if (status != 0) {
-		printk(KERN_ERR
-		       "RTAS query-cpu-stopped-state failed: %i\n", status);
-		return status;
-	}
-
-	return cpu_status;
-}
-
-int pSeries_cpu_disable(void)
-{
-	int cpu = smp_processor_id();
-
-	cpu_clear(cpu, cpu_online_map);
-	systemcfg->processorCount--;
-
-	/*fix boot_cpuid here*/
-	if (cpu == boot_cpuid)
-		boot_cpuid = any_online_cpu(cpu_online_map);
-
-	/* FIXME: abstract this to not be platform specific later on */
-	xics_migrate_irqs_away();
-	return 0;
-}
-
-void pSeries_cpu_die(unsigned int cpu)
-{
-	int tries;
-	int cpu_status;
-	unsigned int pcpu = get_hard_smp_processor_id(cpu);
-
-	for (tries = 0; tries < 25; tries++) {
-		cpu_status = query_cpu_stopped(pcpu);
-		if (cpu_status == 0 || cpu_status == -1)
-			break;
-		msleep(200);
-	}
-	if (cpu_status != 0) {
-		printk("Querying DEAD? cpu %i (%i) shows %i\n",
-		       cpu, pcpu, cpu_status);
-	}
-
-	/* Isolation and deallocation are definatly done by
-	 * drslot_chrp_cpu.  If they were not they would be
-	 * done here.  Change isolate state to Isolate and
-	 * change allocation-state to Unusable.
-	 */
-	paca[cpu].cpu_start = 0;
-}
-
-/*
- * Update cpu_present_map and paca(s) for a new cpu node.  The wrinkle
- * here is that a cpu device node may represent up to two logical cpus
- * in the SMT case.  We must honor the assumption in other code that
- * the logical ids for sibling SMT threads x and y are adjacent, such
- * that x^1 == y and y^1 == x.
- */
-static int pSeries_add_processor(struct device_node *np)
-{
-	unsigned int cpu;
-	cpumask_t candidate_map, tmp = CPU_MASK_NONE;
-	int err = -ENOSPC, len, nthreads, i;
-	u32 *intserv;
-
-	intserv = (u32 *)get_property(np, "ibm,ppc-interrupt-server#s", &len);
-	if (!intserv)
-		return 0;
-
-	nthreads = len / sizeof(u32);
-	for (i = 0; i < nthreads; i++)
-		cpu_set(i, tmp);
-
-	lock_cpu_hotplug();
-
-	BUG_ON(!cpus_subset(cpu_present_map, cpu_possible_map));
-
-	/* Get a bitmap of unoccupied slots. */
-	cpus_xor(candidate_map, cpu_possible_map, cpu_present_map);
-	if (cpus_empty(candidate_map)) {
-		/* If we get here, it most likely means that NR_CPUS is
-		 * less than the partition's max processors setting.
-		 */
-		printk(KERN_ERR "Cannot add cpu %s; this system configuration"
-		       " supports %d logical cpus.\n", np->full_name,
-		       cpus_weight(cpu_possible_map));
-		goto out_unlock;
-	}
-
-	while (!cpus_empty(tmp))
-		if (cpus_subset(tmp, candidate_map))
-			/* Found a range where we can insert the new cpu(s) */
-			break;
-		else
-			cpus_shift_left(tmp, tmp, nthreads);
-
-	if (cpus_empty(tmp)) {
-		printk(KERN_ERR "Unable to find space in cpu_present_map for"
-		       " processor %s with %d thread(s)\n", np->name,
-		       nthreads);
-		goto out_unlock;
-	}
-
-	for_each_cpu_mask(cpu, tmp) {
-		BUG_ON(cpu_isset(cpu, cpu_present_map));
-		cpu_set(cpu, cpu_present_map);
-		set_hard_smp_processor_id(cpu, *intserv++);
-	}
-	err = 0;
-out_unlock:
-	unlock_cpu_hotplug();
-	return err;
-}
-
-/*
- * Update the present map for a cpu node which is going away, and set
- * the hard id in the paca(s) to -1 to be consistent with boot time
- * convention for non-present cpus.
- */
-static void pSeries_remove_processor(struct device_node *np)
-{
-	unsigned int cpu;
-	int len, nthreads, i;
-	u32 *intserv;
-
-	intserv = (u32 *)get_property(np, "ibm,ppc-interrupt-server#s", &len);
-	if (!intserv)
-		return;
-
-	nthreads = len / sizeof(u32);
-
-	lock_cpu_hotplug();
-	for (i = 0; i < nthreads; i++) {
-		for_each_present_cpu(cpu) {
-			if (get_hard_smp_processor_id(cpu) != intserv[i])
-				continue;
-			BUG_ON(cpu_online(cpu));
-			cpu_clear(cpu, cpu_present_map);
-			set_hard_smp_processor_id(cpu, -1);
-			break;
-		}
-		if (cpu == NR_CPUS)
-			printk(KERN_WARNING "Could not find cpu to remove "
-			       "with physical id 0x%x\n", intserv[i]);
-	}
-	unlock_cpu_hotplug();
-}
-
-static int pSeries_smp_notifier(struct notifier_block *nb, unsigned long action, void *node)
-{
-	int err = NOTIFY_OK;
-
-	switch (action) {
-	case PSERIES_RECONFIG_ADD:
-		if (pSeries_add_processor(node))
-			err = NOTIFY_BAD;
-		break;
-	case PSERIES_RECONFIG_REMOVE:
-		pSeries_remove_processor(node);
-		break;
-	default:
-		err = NOTIFY_DONE;
-		break;
-	}
-	return err;
-}
-
-static struct notifier_block pSeries_smp_nb = {
-	.notifier_call = pSeries_smp_notifier,
-};
-
-#endif /* CONFIG_HOTPLUG_CPU */
-
-/**
- * smp_startup_cpu() - start the given cpu
- *
- * At boot time, there is nothing to do for primary threads which were
- * started from Open Firmware.  For anything else, call RTAS with the
- * appropriate start location.
- *
- * Returns:
- *	0	- failure
- *	1	- success
- */
-static inline int __devinit smp_startup_cpu(unsigned int lcpu)
-{
-	int status;
-	unsigned long start_here = __pa((u32)*((unsigned long *)
-					       pSeries_secondary_smp_init));
-	unsigned int pcpu;
-	int start_cpu;
-
-	if (cpu_isset(lcpu, of_spin_map))
-		/* Already started by OF and sitting in spin loop */
-		return 1;
-
-	pcpu = get_hard_smp_processor_id(lcpu);
-
-	/* Fixup atomic count: it exited inside IRQ handler. */
-	paca[lcpu].__current->thread_info->preempt_count	= 0;
-
-	/* 
-	 * If the RTAS start-cpu token does not exist then presume the
-	 * cpu is already spinning.
-	 */
-	start_cpu = rtas_token("start-cpu");
-	if (start_cpu == RTAS_UNKNOWN_SERVICE)
-		return 1;
-
-	status = rtas_call(start_cpu, 3, 1, NULL, pcpu, start_here, lcpu);
-	if (status != 0) {
-		printk(KERN_ERR "start-cpu failed: %i\n", status);
-		return 0;
-	}
-
-	return 1;
-}
-
-#ifdef CONFIG_XICS
-static inline void smp_xics_do_message(int cpu, int msg)
-{
-	set_bit(msg, &xics_ipi_message[cpu].value);
-	mb();
-	xics_cause_IPI(cpu);
-}
-
-static void smp_xics_message_pass(int target, int msg)
-{
-	unsigned int i;
-
-	if (target < NR_CPUS) {
-		smp_xics_do_message(target, msg);
-	} else {
-		for_each_online_cpu(i) {
-			if (target == MSG_ALL_BUT_SELF
-			    && i == smp_processor_id())
-				continue;
-			smp_xics_do_message(i, msg);
-		}
-	}
-}
-
-static int __init smp_xics_probe(void)
-{
-	xics_request_IPIs();
-
-	return cpus_weight(cpu_possible_map);
-}
-
-static void __devinit smp_xics_setup_cpu(int cpu)
-{
-	if (cpu != boot_cpuid)
-		xics_setup_cpu();
-
-	if (firmware_has_feature(FW_FEATURE_SPLPAR))
-		vpa_init(cpu);
-
-	cpu_clear(cpu, of_spin_map);
-
-}
-#endif /* CONFIG_XICS */
-#ifdef CONFIG_BPA_IIC
-static void smp_iic_message_pass(int target, int msg)
-{
-	unsigned int i;
-
-	if (target < NR_CPUS) {
-		iic_cause_IPI(target, msg);
-	} else {
-		for_each_online_cpu(i) {
-			if (target == MSG_ALL_BUT_SELF
-			    && i == smp_processor_id())
-				continue;
-			iic_cause_IPI(i, msg);
-		}
-	}
-}
-
-static int __init smp_iic_probe(void)
-{
-	iic_request_IPIs();
-
-	return cpus_weight(cpu_possible_map);
-}
-
-static void __devinit smp_iic_setup_cpu(int cpu)
-{
-	if (cpu != boot_cpuid)
-		iic_setup_cpu();
-}
-#endif /* CONFIG_BPA_IIC */
-
-static DEFINE_SPINLOCK(timebase_lock);
-static unsigned long timebase = 0;
-
-static void __devinit pSeries_give_timebase(void)
-{
-	spin_lock(&timebase_lock);
-	rtas_call(rtas_token("freeze-time-base"), 0, 1, NULL);
-	timebase = get_tb();
-	spin_unlock(&timebase_lock);
-
-	while (timebase)
-		barrier();
-	rtas_call(rtas_token("thaw-time-base"), 0, 1, NULL);
-}
-
-static void __devinit pSeries_take_timebase(void)
-{
-	while (!timebase)
-		barrier();
-	spin_lock(&timebase_lock);
-	set_tb(timebase >> 32, timebase & 0xffffffff);
-	timebase = 0;
-	spin_unlock(&timebase_lock);
-}
-
-static void __devinit smp_pSeries_kick_cpu(int nr)
-{
-	BUG_ON(nr < 0 || nr >= NR_CPUS);
-
-	if (!smp_startup_cpu(nr))
-		return;
-
-	/*
-	 * The processor is currently spinning, waiting for the
-	 * cpu_start field to become non-zero After we set cpu_start,
-	 * the processor will continue on to secondary_start
-	 */
-	paca[nr].cpu_start = 1;
-}
-
-static int smp_pSeries_cpu_bootable(unsigned int nr)
-{
-	/* Special case - we inhibit secondary thread startup
-	 * during boot if the user requests it.  Odd-numbered
-	 * cpus are assumed to be secondary threads.
-	 */
-	if (system_state < SYSTEM_RUNNING &&
-	    cpu_has_feature(CPU_FTR_SMT) &&
-	    !smt_enabled_at_boot && nr % 2 != 0)
-		return 0;
-
-	return 1;
-}
-#ifdef CONFIG_MPIC
-static struct smp_ops_t pSeries_mpic_smp_ops = {
-	.message_pass	= smp_mpic_message_pass,
-	.probe		= smp_mpic_probe,
-	.kick_cpu	= smp_pSeries_kick_cpu,
-	.setup_cpu	= smp_mpic_setup_cpu,
-};
-#endif
-#ifdef CONFIG_XICS
-static struct smp_ops_t pSeries_xics_smp_ops = {
-	.message_pass	= smp_xics_message_pass,
-	.probe		= smp_xics_probe,
-	.kick_cpu	= smp_pSeries_kick_cpu,
-	.setup_cpu	= smp_xics_setup_cpu,
-	.cpu_bootable	= smp_pSeries_cpu_bootable,
-};
-#endif
-#ifdef CONFIG_BPA_IIC
-static struct smp_ops_t bpa_iic_smp_ops = {
-	.message_pass	= smp_iic_message_pass,
-	.probe		= smp_iic_probe,
-	.kick_cpu	= smp_pSeries_kick_cpu,
-	.setup_cpu	= smp_iic_setup_cpu,
-	.cpu_bootable	= smp_pSeries_cpu_bootable,
-};
-#endif
-
-/* This is called very early */
-void __init smp_init_pSeries(void)
-{
-	int i;
-
-	DBG(" -> smp_init_pSeries()\n");
-
-	switch (ppc64_interrupt_controller) {
-#ifdef CONFIG_MPIC
-	case IC_OPEN_PIC:
-		smp_ops = &pSeries_mpic_smp_ops;
-		break;
-#endif
-#ifdef CONFIG_XICS
-	case IC_PPC_XIC:
-		smp_ops = &pSeries_xics_smp_ops;
-		break;
-#endif
-#ifdef CONFIG_BPA_IIC
-	case IC_BPA_IIC:
-		smp_ops = &bpa_iic_smp_ops;
-		break;
-#endif
-	default:
-		panic("Invalid interrupt controller");
-	}
-
-#ifdef CONFIG_HOTPLUG_CPU
-	smp_ops->cpu_disable = pSeries_cpu_disable;
-	smp_ops->cpu_die = pSeries_cpu_die;
-
-	/* Processors can be added/removed only on LPAR */
-	if (systemcfg->platform == PLATFORM_PSERIES_LPAR)
-		pSeries_reconfig_notifier_register(&pSeries_smp_nb);
-#endif
-
-	/* Mark threads which are still spinning in hold loops. */
-	if (cpu_has_feature(CPU_FTR_SMT)) {
-		for_each_present_cpu(i) { 
-			if (i % 2 == 0)
-				/*
-				 * Even-numbered logical cpus correspond to
-				 * primary threads.
-				 */
-				cpu_set(i, of_spin_map);
-		}
-	} else {
-		of_spin_map = cpu_present_map;
-	}
-
-	cpu_clear(boot_cpuid, of_spin_map);
-
-	/* Non-lpar has additional take/give timebase */
-	if (rtas_token("freeze-time-base") != RTAS_UNKNOWN_SERVICE) {
-		smp_ops->give_timebase = pSeries_give_timebase;
-		smp_ops->take_timebase = pSeries_take_timebase;
-	}
-
-	DBG(" <- smp_init_pSeries()\n");
-}
-