obj-$(CONFIG_MODULES) += ppc_ksyms.o
obj-$(CONFIG_BOOTX_TEXT) += btext.o
obj-$(CONFIG_6xx) += idle_6xx.o
+obj-$(CONFIG_SMP) += smp.o
ifeq ($(CONFIG_PPC_ISERIES),y)
$(obj)/head_64.o: $(obj)/lparmap.s
else
# stuff used from here for ARCH=ppc or ARCH=ppc64
+smpobj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_PPC64) += traps.o process.o init_task.o time.o \
- setup-common.o
+ setup-common.o $(smpobj-y)
endif
}
#ifdef CONFIG_SMP
-#ifdef CONFIG_PPC64 /* XXX for now */
pvr = per_cpu(pvr, cpu_id);
-#else
- pvr = cpu_data[cpu_id].pvr;
-#endif
#else
pvr = mfspr(SPRN_PVR);
#endif
}
console_initcall(set_preferred_console);
#endif /* CONFIG_PPC_MULTIPLATFORM */
+
+#ifdef CONFIG_SMP
+
+/**
+ * setup_cpu_maps - initialize the following cpu maps:
+ * cpu_possible_map
+ * cpu_present_map
+ * cpu_sibling_map
+ *
+ * Having the possible map set up early allows us to restrict allocations
+ * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
+ *
+ * We do not initialize the online map here; cpus set their own bits in
+ * cpu_online_map as they come up.
+ *
+ * This function is valid only for Open Firmware systems. finish_device_tree
+ * must be called before using this.
+ *
+ * While we're here, we may as well set the "physical" cpu ids in the paca.
+ */
+void __init smp_setup_cpu_maps(void)
+{
+ struct device_node *dn = NULL;
+ int cpu = 0;
+ int swap_cpuid = 0;
+
+ while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
+ int *intserv;
+ int j, len = sizeof(u32), nthreads = 1;
+
+ intserv = (int *)get_property(dn, "ibm,ppc-interrupt-server#s",
+ &len);
+ if (intserv)
+ nthreads = len / sizeof(int);
+ else {
+ intserv = (int *) get_property(dn, "reg", NULL);
+ if (!intserv)
+ intserv = &cpu; /* assume logical == phys */
+ }
+
+ for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
+ cpu_set(cpu, cpu_present_map);
+ set_hard_smp_processor_id(cpu, intserv[j]);
+
+ if (intserv[j] == boot_cpuid_phys)
+ swap_cpuid = cpu;
+ cpu_set(cpu, cpu_possible_map);
+ cpu++;
+ }
+ }
+
+ /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
+ * boot cpu is logical 0.
+ */
+ if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
+ u32 tmp;
+ tmp = get_hard_smp_processor_id(0);
+ set_hard_smp_processor_id(0, boot_cpuid_phys);
+ set_hard_smp_processor_id(swap_cpuid, tmp);
+ }
+
+#ifdef CONFIG_PPC64
+ /*
+ * On pSeries LPAR, we need to know how many cpus
+ * could possibly be added to this partition.
+ */
+ if (systemcfg->platform == PLATFORM_PSERIES_LPAR &&
+ (dn = of_find_node_by_path("/rtas"))) {
+ int num_addr_cell, num_size_cell, maxcpus;
+ unsigned int *ireg;
+
+ num_addr_cell = prom_n_addr_cells(dn);
+ num_size_cell = prom_n_size_cells(dn);
+
+ ireg = (unsigned int *)
+ get_property(dn, "ibm,lrdr-capacity", NULL);
+
+ if (!ireg)
+ goto out;
+
+ maxcpus = ireg[num_addr_cell + num_size_cell];
+
+ /* Double maxcpus for processors which have SMT capability */
+ if (cpu_has_feature(CPU_FTR_SMT))
+ maxcpus *= 2;
+
+ if (maxcpus > NR_CPUS) {
+ printk(KERN_WARNING
+ "Partition configured for %d cpus, "
+ "operating system maximum is %d.\n",
+ maxcpus, NR_CPUS);
+ maxcpus = NR_CPUS;
+ } else
+ printk(KERN_INFO "Partition configured for %d cpus.\n",
+ maxcpus);
+
+ for (cpu = 0; cpu < maxcpus; cpu++)
+ cpu_set(cpu, cpu_possible_map);
+ out:
+ of_node_put(dn);
+ }
+
+ /*
+ * Do the sibling map; assume only two threads per processor.
+ */
+ for_each_cpu(cpu) {
+ cpu_set(cpu, cpu_sibling_map[cpu]);
+ if (cpu_has_feature(CPU_FTR_SMT))
+ cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
+ }
+
+ systemcfg->processorCount = num_present_cpus();
+#endif /* CONFIG_PPC64 */
+}
+#endif /* CONFIG_SMP */
unflatten_device_tree();
finish_device_tree();
+ smp_setup_cpu_maps();
+
#ifdef CONFIG_BOOTX_TEXT
init_boot_display();
#endif
}
early_param("smt-enabled", early_smt_enabled);
-/**
- * setup_cpu_maps - initialize the following cpu maps:
- * cpu_possible_map
- * cpu_present_map
- * cpu_sibling_map
- *
- * Having the possible map set up early allows us to restrict allocations
- * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
- *
- * We do not initialize the online map here; cpus set their own bits in
- * cpu_online_map as they come up.
- *
- * This function is valid only for Open Firmware systems. finish_device_tree
- * must be called before using this.
- *
- * While we're here, we may as well set the "physical" cpu ids in the paca.
- */
-static void __init setup_cpu_maps(void)
-{
- struct device_node *dn = NULL;
- int cpu = 0;
- int swap_cpuid = 0;
-
- check_smt_enabled();
-
- while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
- u32 *intserv;
- int j, len = sizeof(u32), nthreads;
-
- intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s",
- &len);
- if (!intserv)
- intserv = (u32 *)get_property(dn, "reg", NULL);
-
- nthreads = len / sizeof(u32);
-
- for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
- cpu_set(cpu, cpu_present_map);
- set_hard_smp_processor_id(cpu, intserv[j]);
-
- if (intserv[j] == boot_cpuid_phys)
- swap_cpuid = cpu;
- cpu_set(cpu, cpu_possible_map);
- cpu++;
- }
- }
-
- /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
- * boot cpu is logical 0.
- */
- if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
- u32 tmp;
- tmp = get_hard_smp_processor_id(0);
- set_hard_smp_processor_id(0, boot_cpuid_phys);
- set_hard_smp_processor_id(swap_cpuid, tmp);
- }
-
- /*
- * On pSeries LPAR, we need to know how many cpus
- * could possibly be added to this partition.
- */
- if (systemcfg->platform == PLATFORM_PSERIES_LPAR &&
- (dn = of_find_node_by_path("/rtas"))) {
- int num_addr_cell, num_size_cell, maxcpus;
- unsigned int *ireg;
-
- num_addr_cell = prom_n_addr_cells(dn);
- num_size_cell = prom_n_size_cells(dn);
-
- ireg = (unsigned int *)
- get_property(dn, "ibm,lrdr-capacity", NULL);
-
- if (!ireg)
- goto out;
-
- maxcpus = ireg[num_addr_cell + num_size_cell];
-
- /* Double maxcpus for processors which have SMT capability */
- if (cpu_has_feature(CPU_FTR_SMT))
- maxcpus *= 2;
-
- if (maxcpus > NR_CPUS) {
- printk(KERN_WARNING
- "Partition configured for %d cpus, "
- "operating system maximum is %d.\n",
- maxcpus, NR_CPUS);
- maxcpus = NR_CPUS;
- } else
- printk(KERN_INFO "Partition configured for %d cpus.\n",
- maxcpus);
-
- for (cpu = 0; cpu < maxcpus; cpu++)
- cpu_set(cpu, cpu_possible_map);
- out:
- of_node_put(dn);
- }
-
- /*
- * Do the sibling map; assume only two threads per processor.
- */
- for_each_cpu(cpu) {
- cpu_set(cpu, cpu_sibling_map[cpu]);
- if (cpu_has_feature(CPU_FTR_SMT))
- cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
- }
-
- systemcfg->processorCount = num_present_cpus();
-}
+#else
+#define check_smt_enabled()
#endif /* CONFIG_SMP */
extern struct machdep_calls pSeries_md;
DBG(" <- smp_release_cpus()\n");
}
+#else
+#define smp_release_cpus()
#endif /* CONFIG_SMP || CONFIG_KEXEC */
/*
parse_early_param();
-#ifdef CONFIG_SMP
- /*
- * iSeries has already initialized the cpu maps at this point.
- */
- setup_cpu_maps();
+ check_smt_enabled();
+ smp_setup_cpu_maps();
/* Release secondary cpus out of their spinloops at 0x60 now that
* we can map physical -> logical CPU ids
*/
smp_release_cpus();
-#endif
printk("Starting Linux PPC64 %s\n", system_utsname.version);
--- /dev/null
+/*
+ * SMP support for ppc.
+ *
+ * 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>
+ *
+ * PowerPC-64 Support added by Dave Engebretsen, Peter Bergner, and
+ * Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
+ *
+ * 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 <linux/notifier.h>
+
+#include <asm/ptrace.h>
+#include <asm/atomic.h>
+#include <asm/irq.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/smp.h>
+#include <asm/time.h>
+#include <asm/xmon.h>
+#include <asm/machdep.h>
+#include <asm/cputable.h>
+#include <asm/system.h>
+#include <asm/mpic.h>
+#ifdef CONFIG_PPC64
+#include <asm/paca.h>
+#endif
+
+int smp_hw_index[NR_CPUS];
+struct thread_info *secondary_ti;
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+cpumask_t cpu_possible_map = CPU_MASK_NONE;
+cpumask_t cpu_online_map = CPU_MASK_NONE;
+cpumask_t cpu_sibling_map[NR_CPUS] = { [0 ... NR_CPUS-1] = CPU_MASK_NONE };
+
+EXPORT_SYMBOL(cpu_online_map);
+EXPORT_SYMBOL(cpu_possible_map);
+
+/* SMP operations for this machine */
+struct smp_ops_t *smp_ops;
+
+static volatile unsigned int cpu_callin_map[NR_CPUS];
+
+void smp_call_function_interrupt(void);
+
+int smt_enabled_at_boot = 1;
+
+#ifdef CONFIG_MPIC
+int __init smp_mpic_probe(void)
+{
+ int nr_cpus;
+
+ DBG("smp_mpic_probe()...\n");
+
+ nr_cpus = cpus_weight(cpu_possible_map);
+
+ DBG("nr_cpus: %d\n", nr_cpus);
+
+ if (nr_cpus > 1)
+ mpic_request_ipis();
+
+ return nr_cpus;
+}
+
+void __devinit smp_mpic_setup_cpu(int cpu)
+{
+ mpic_setup_this_cpu();
+}
+#endif /* CONFIG_MPIC */
+
+#ifdef CONFIG_PPC64
+void __devinit smp_generic_kick_cpu(int nr)
+{
+ BUG_ON(nr < 0 || nr >= NR_CPUS);
+
+ /*
+ * 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;
+ smp_mb();
+}
+#endif
+
+void smp_message_recv(int msg, struct pt_regs *regs)
+{
+ switch(msg) {
+ case PPC_MSG_CALL_FUNCTION:
+ smp_call_function_interrupt();
+ break;
+ case PPC_MSG_RESCHEDULE:
+ /* XXX Do we have to do this? */
+ set_need_resched();
+ break;
+#ifdef CONFIG_DEBUGGER
+ case PPC_MSG_DEBUGGER_BREAK:
+ debugger_ipi(regs);
+ break;
+#endif
+ default:
+ printk("SMP %d: smp_message_recv(): unknown msg %d\n",
+ smp_processor_id(), msg);
+ break;
+ }
+}
+
+void smp_send_reschedule(int cpu)
+{
+ smp_ops->message_pass(cpu, PPC_MSG_RESCHEDULE);
+}
+
+#ifdef CONFIG_DEBUGGER
+void smp_send_debugger_break(int cpu)
+{
+ smp_ops->message_pass(cpu, PPC_MSG_DEBUGGER_BREAK);
+}
+#endif
+
+static void stop_this_cpu(void *dummy)
+{
+ local_irq_disable();
+ while (1)
+ ;
+}
+
+void smp_send_stop(void)
+{
+ smp_call_function(stop_this_cpu, NULL, 1, 0);
+}
+
+/*
+ * Structure and data for smp_call_function(). This is designed to minimise
+ * static memory requirements. It also looks cleaner.
+ * Stolen from the i386 version.
+ */
+static __cacheline_aligned_in_smp DEFINE_SPINLOCK(call_lock);
+
+static struct call_data_struct {
+ void (*func) (void *info);
+ void *info;
+ atomic_t started;
+ atomic_t finished;
+ int wait;
+} *call_data;
+
+/* delay of at least 8 seconds */
+#define SMP_CALL_TIMEOUT 8
+
+/*
+ * This function sends a 'generic call function' IPI to all other CPUs
+ * in the system.
+ *
+ * [SUMMARY] Run a function on all other CPUs.
+ * <func> The function to run. This must be fast and non-blocking.
+ * <info> An arbitrary pointer to pass to the function.
+ * <nonatomic> currently unused.
+ * <wait> If true, wait (atomically) until function has completed on other CPUs.
+ * [RETURNS] 0 on success, else a negative status code. Does not return until
+ * remote CPUs are nearly ready to execute <<func>> or are or have executed.
+ *
+ * You must not call this function with disabled interrupts or from a
+ * hardware interrupt handler or from a bottom half handler.
+ */
+int smp_call_function (void (*func) (void *info), void *info, int nonatomic,
+ int wait)
+{
+ struct call_data_struct data;
+ int ret = -1, cpus;
+ u64 timeout;
+
+ /* Can deadlock when called with interrupts disabled */
+ WARN_ON(irqs_disabled());
+
+ data.func = func;
+ data.info = info;
+ atomic_set(&data.started, 0);
+ data.wait = wait;
+ if (wait)
+ atomic_set(&data.finished, 0);
+
+ spin_lock(&call_lock);
+ /* Must grab online cpu count with preempt disabled, otherwise
+ * it can change. */
+ cpus = num_online_cpus() - 1;
+ if (!cpus) {
+ ret = 0;
+ goto out;
+ }
+
+ call_data = &data;
+ smp_wmb();
+ /* Send a message to all other CPUs and wait for them to respond */
+ smp_ops->message_pass(MSG_ALL_BUT_SELF, PPC_MSG_CALL_FUNCTION);
+
+ timeout = get_tb() + (u64) SMP_CALL_TIMEOUT * tb_ticks_per_sec;
+
+ /* Wait for response */
+ while (atomic_read(&data.started) != cpus) {
+ HMT_low();
+ if (get_tb() >= timeout) {
+ printk("smp_call_function on cpu %d: other cpus not "
+ "responding (%d)\n", smp_processor_id(),
+ atomic_read(&data.started));
+ debugger(NULL);
+ goto out;
+ }
+ }
+
+ if (wait) {
+ while (atomic_read(&data.finished) != cpus) {
+ HMT_low();
+ if (get_tb() >= timeout) {
+ printk("smp_call_function on cpu %d: other "
+ "cpus not finishing (%d/%d)\n",
+ smp_processor_id(),
+ atomic_read(&data.finished),
+ atomic_read(&data.started));
+ debugger(NULL);
+ goto out;
+ }
+ }
+ }
+
+ ret = 0;
+
+ out:
+ call_data = NULL;
+ HMT_medium();
+ spin_unlock(&call_lock);
+ return ret;
+}
+
+EXPORT_SYMBOL(smp_call_function);
+
+void smp_call_function_interrupt(void)
+{
+ void (*func) (void *info);
+ void *info;
+ int wait;
+
+ /* call_data will be NULL if the sender timed out while
+ * waiting on us to receive the call.
+ */
+ if (!call_data)
+ return;
+
+ func = call_data->func;
+ info = call_data->info;
+ wait = call_data->wait;
+
+ if (!wait)
+ smp_mb__before_atomic_inc();
+
+ /*
+ * Notify initiating CPU that I've grabbed the data and am
+ * about to execute the function
+ */
+ atomic_inc(&call_data->started);
+ /*
+ * At this point the info structure may be out of scope unless wait==1
+ */
+ (*func)(info);
+ if (wait) {
+ smp_mb__before_atomic_inc();
+ atomic_inc(&call_data->finished);
+ }
+}
+
+extern struct gettimeofday_struct do_gtod;
+
+struct thread_info *current_set[NR_CPUS];
+
+DECLARE_PER_CPU(unsigned int, pvr);
+
+static void __devinit smp_store_cpu_info(int id)
+{
+ per_cpu(pvr, id) = mfspr(SPRN_PVR);
+}
+
+static void __init smp_create_idle(unsigned int cpu)
+{
+ struct task_struct *p;
+
+ /* create a process for the processor */
+ p = fork_idle(cpu);
+ if (IS_ERR(p))
+ panic("failed fork for CPU %u: %li", cpu, PTR_ERR(p));
+#ifdef CONFIG_PPC64
+ paca[cpu].__current = p;
+#endif
+ current_set[cpu] = p->thread_info;
+ p->thread_info->cpu = cpu;
+}
+
+void __init smp_prepare_cpus(unsigned int max_cpus)
+{
+ unsigned int cpu;
+
+ DBG("smp_prepare_cpus\n");
+
+ /*
+ * setup_cpu may need to be called on the boot cpu. We havent
+ * spun any cpus up but lets be paranoid.
+ */
+ BUG_ON(boot_cpuid != smp_processor_id());
+
+ /* Fixup boot cpu */
+ smp_store_cpu_info(boot_cpuid);
+ cpu_callin_map[boot_cpuid] = 1;
+
+ max_cpus = smp_ops->probe();
+
+ smp_space_timers(max_cpus);
+
+ for_each_cpu(cpu)
+ if (cpu != boot_cpuid)
+ smp_create_idle(cpu);
+}
+
+void __devinit smp_prepare_boot_cpu(void)
+{
+ BUG_ON(smp_processor_id() != boot_cpuid);
+
+ cpu_set(boot_cpuid, cpu_online_map);
+#ifdef CONFIG_PPC64
+ paca[boot_cpuid].__current = current;
+#endif
+ current_set[boot_cpuid] = current->thread_info;
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+/* State of each CPU during hotplug phases */
+DEFINE_PER_CPU(int, cpu_state) = { 0 };
+
+int generic_cpu_disable(void)
+{
+ unsigned int cpu = smp_processor_id();
+
+ if (cpu == boot_cpuid)
+ return -EBUSY;
+
+ systemcfg->processorCount--;
+ cpu_clear(cpu, cpu_online_map);
+ fixup_irqs(cpu_online_map);
+ return 0;
+}
+
+int generic_cpu_enable(unsigned int cpu)
+{
+ /* Do the normal bootup if we haven't
+ * already bootstrapped. */
+ if (system_state != SYSTEM_RUNNING)
+ return -ENOSYS;
+
+ /* get the target out of it's holding state */
+ per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
+ smp_wmb();
+
+ while (!cpu_online(cpu))
+ cpu_relax();
+
+ fixup_irqs(cpu_online_map);
+ /* counter the irq disable in fixup_irqs */
+ local_irq_enable();
+ return 0;
+}
+
+void generic_cpu_die(unsigned int cpu)
+{
+ int i;
+
+ for (i = 0; i < 100; i++) {
+ smp_rmb();
+ if (per_cpu(cpu_state, cpu) == CPU_DEAD)
+ return;
+ msleep(100);
+ }
+ printk(KERN_ERR "CPU%d didn't die...\n", cpu);
+}
+
+void generic_mach_cpu_die(void)
+{
+ unsigned int cpu;
+
+ local_irq_disable();
+ cpu = smp_processor_id();
+ printk(KERN_DEBUG "CPU%d offline\n", cpu);
+ __get_cpu_var(cpu_state) = CPU_DEAD;
+ smp_wmb();
+ while (__get_cpu_var(cpu_state) != CPU_UP_PREPARE)
+ cpu_relax();
+
+ flush_tlb_pending();
+ cpu_set(cpu, cpu_online_map);
+ local_irq_enable();
+}
+#endif
+
+static int __devinit cpu_enable(unsigned int cpu)
+{
+ if (smp_ops->cpu_enable)
+ return smp_ops->cpu_enable(cpu);
+
+ return -ENOSYS;
+}
+
+int __devinit __cpu_up(unsigned int cpu)
+{
+ int c;
+
+ secondary_ti = current_set[cpu];
+ if (!cpu_enable(cpu))
+ return 0;
+
+ if (smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu))
+ return -EINVAL;
+
+#ifdef CONFIG_PPC64
+ paca[cpu].default_decr = tb_ticks_per_jiffy;
+#endif
+
+ /* Make sure callin-map entry is 0 (can be leftover a CPU
+ * hotplug
+ */
+ cpu_callin_map[cpu] = 0;
+
+ /* The information for processor bringup must
+ * be written out to main store before we release
+ * the processor.
+ */
+ smp_mb();
+
+ /* wake up cpus */
+ DBG("smp: kicking cpu %d\n", cpu);
+ smp_ops->kick_cpu(cpu);
+
+ /*
+ * wait to see if the cpu made a callin (is actually up).
+ * use this value that I found through experimentation.
+ * -- Cort
+ */
+ if (system_state < SYSTEM_RUNNING)
+ for (c = 5000; c && !cpu_callin_map[cpu]; c--)
+ udelay(100);
+#ifdef CONFIG_HOTPLUG_CPU
+ else
+ /*
+ * CPUs can take much longer to come up in the
+ * hotplug case. Wait five seconds.
+ */
+ for (c = 25; c && !cpu_callin_map[cpu]; c--) {
+ msleep(200);
+ }
+#endif
+
+ if (!cpu_callin_map[cpu]) {
+ printk("Processor %u is stuck.\n", cpu);
+ return -ENOENT;
+ }
+
+ printk("Processor %u found.\n", cpu);
+
+ if (smp_ops->give_timebase)
+ smp_ops->give_timebase();
+
+ /* Wait until cpu puts itself in the online map */
+ while (!cpu_online(cpu))
+ cpu_relax();
+
+ return 0;
+}
+
+
+/* Activate a secondary processor. */
+int __devinit start_secondary(void *unused)
+{
+ unsigned int cpu = smp_processor_id();
+
+ atomic_inc(&init_mm.mm_count);
+ current->active_mm = &init_mm;
+
+ smp_store_cpu_info(cpu);
+ set_dec(tb_ticks_per_jiffy);
+ cpu_callin_map[cpu] = 1;
+
+ smp_ops->setup_cpu(cpu);
+ if (smp_ops->take_timebase)
+ smp_ops->take_timebase();
+
+ spin_lock(&call_lock);
+ cpu_set(cpu, cpu_online_map);
+ spin_unlock(&call_lock);
+
+ local_irq_enable();
+
+ cpu_idle();
+ return 0;
+}
+
+int setup_profiling_timer(unsigned int multiplier)
+{
+ return 0;
+}
+
+void __init smp_cpus_done(unsigned int max_cpus)
+{
+ cpumask_t old_mask;
+
+ /* We want the setup_cpu() here to be called from CPU 0, but our
+ * init thread may have been "borrowed" by another CPU in the meantime
+ * se we pin us down to CPU 0 for a short while
+ */
+ old_mask = current->cpus_allowed;
+ set_cpus_allowed(current, cpumask_of_cpu(boot_cpuid));
+
+ smp_ops->setup_cpu(boot_cpuid);
+
+ set_cpus_allowed(current, old_mask);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+int __cpu_disable(void)
+{
+ if (smp_ops->cpu_disable)
+ return smp_ops->cpu_disable();
+
+ return -ENOSYS;
+}
+
+void __cpu_die(unsigned int cpu)
+{
+ if (smp_ops->cpu_die)
+ smp_ops->cpu_die(cpu);
+}
+#endif
#include <asm/smp.h>
#include <asm/mpic.h>
-extern unsigned long smp_chrp_cpu_nr;
-
-static int __init smp_chrp_probe(void)
-{
- struct device_node *cpus = NULL;
- unsigned int *reg;
- int reglen;
- int ncpus = 0;
- int cpuid;
- unsigned int phys;
-
- /* Count CPUs in the device-tree */
- cpuid = 1; /* the boot cpu is logical cpu 0 */
- while ((cpus = of_find_node_by_type(cpus, "cpu")) != NULL) {
- phys = ncpus;
- reg = (unsigned int *) get_property(cpus, "reg", ®len);
- if (reg && reglen >= sizeof(unsigned int))
- /* hmmm, not having a reg property would be bad */
- phys = *reg;
- if (phys != boot_cpuid_phys) {
- set_hard_smp_processor_id(cpuid, phys);
- ++cpuid;
- }
- ++ncpus;
- }
-
- printk(KERN_INFO "CHRP SMP probe found %d cpus\n", ncpus);
-
- /* Nothing more to do if less than 2 of them */
- if (ncpus <= 1)
- return 1;
-
- mpic_request_ipis();
-
- return ncpus;
-}
-
static void __devinit smp_chrp_kick_cpu(int nr)
{
*(unsigned long *)KERNELBASE = nr;
/* CHRP with openpic */
struct smp_ops_t chrp_smp_ops = {
.message_pass = smp_mpic_message_pass,
- .probe = smp_chrp_probe,
+ .probe = smp_mpic_probe,
.kick_cpu = smp_chrp_kick_cpu,
.setup_cpu = smp_chrp_setup_cpu,
.give_timebase = smp_chrp_give_timebase,
obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-mapping.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_KGDB) += ppc-stub.o
-obj-$(CONFIG_SMP) += smp.o smp-tbsync.o
obj-$(CONFIG_TAU) += temp.o
ifndef CONFIG_E200
obj-$(CONFIG_FSL_BOOKE) += perfmon_fsl_booke.o
seq_puts(p, " PowerPC Thermal Assist (cpu temp)\n");
}
#endif
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
/* should this be per processor send/receive? */
seq_printf(p, "IPI (recv/sent): %10u/%u\n",
atomic_read(&ipi_recv), atomic_read(&ipi_sent));
obj-$(CONFIG_KEXEC) += machine_kexec.o
obj-$(CONFIG_EEH) += eeh.o
obj-$(CONFIG_PROC_FS) += proc_ppc64.o
-obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_MODULES) += module.o
ifneq ($(CONFIG_PPC_MERGE),y)
obj-$(CONFIG_MODULES) += ppc_ksyms.o
+++ /dev/null
-/*
- * SMP support for ppc.
- *
- * 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>
- *
- * PowerPC-64 Support added by Dave Engebretsen, Peter Bergner, and
- * Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
- *
- * 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 <linux/notifier.h>
-
-#include <asm/ptrace.h>
-#include <asm/atomic.h>
-#include <asm/irq.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/prom.h>
-#include <asm/smp.h>
-#include <asm/paca.h>
-#include <asm/time.h>
-#include <asm/machdep.h>
-#include <asm/cputable.h>
-#include <asm/system.h>
-#include <asm/abs_addr.h>
-#include <asm/mpic.h>
-
-#ifdef DEBUG
-#define DBG(fmt...) udbg_printf(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-cpumask_t cpu_possible_map = CPU_MASK_NONE;
-cpumask_t cpu_online_map = CPU_MASK_NONE;
-cpumask_t cpu_sibling_map[NR_CPUS] = { [0 ... NR_CPUS-1] = CPU_MASK_NONE };
-
-EXPORT_SYMBOL(cpu_online_map);
-EXPORT_SYMBOL(cpu_possible_map);
-
-struct smp_ops_t *smp_ops;
-
-static volatile unsigned int cpu_callin_map[NR_CPUS];
-
-void smp_call_function_interrupt(void);
-
-int smt_enabled_at_boot = 1;
-
-#ifdef CONFIG_MPIC
-int __init smp_mpic_probe(void)
-{
- int nr_cpus;
-
- DBG("smp_mpic_probe()...\n");
-
- nr_cpus = cpus_weight(cpu_possible_map);
-
- DBG("nr_cpus: %d\n", nr_cpus);
-
- if (nr_cpus > 1)
- mpic_request_ipis();
-
- return nr_cpus;
-}
-
-void __devinit smp_mpic_setup_cpu(int cpu)
-{
- mpic_setup_this_cpu();
-}
-
-void __devinit smp_generic_kick_cpu(int nr)
-{
- BUG_ON(nr < 0 || nr >= NR_CPUS);
-
- /*
- * 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;
- smp_mb();
-}
-
-#endif /* CONFIG_MPIC */
-
-void smp_message_recv(int msg, struct pt_regs *regs)
-{
- switch(msg) {
- case PPC_MSG_CALL_FUNCTION:
- smp_call_function_interrupt();
- break;
- case PPC_MSG_RESCHEDULE:
- /* XXX Do we have to do this? */
- set_need_resched();
- break;
-#if 0
- case PPC_MSG_MIGRATE_TASK:
- /* spare */
- break;
-#endif
-#ifdef CONFIG_DEBUGGER
- case PPC_MSG_DEBUGGER_BREAK:
- debugger_ipi(regs);
- break;
-#endif
- default:
- printk("SMP %d: smp_message_recv(): unknown msg %d\n",
- smp_processor_id(), msg);
- break;
- }
-}
-
-void smp_send_reschedule(int cpu)
-{
- smp_ops->message_pass(cpu, PPC_MSG_RESCHEDULE);
-}
-
-#ifdef CONFIG_DEBUGGER
-void smp_send_debugger_break(int cpu)
-{
- smp_ops->message_pass(cpu, PPC_MSG_DEBUGGER_BREAK);
-}
-#endif
-
-static void stop_this_cpu(void *dummy)
-{
- local_irq_disable();
- while (1)
- ;
-}
-
-void smp_send_stop(void)
-{
- smp_call_function(stop_this_cpu, NULL, 1, 0);
-}
-
-/*
- * Structure and data for smp_call_function(). This is designed to minimise
- * static memory requirements. It also looks cleaner.
- * Stolen from the i386 version.
- */
-static __cacheline_aligned_in_smp DEFINE_SPINLOCK(call_lock);
-
-static struct call_data_struct {
- void (*func) (void *info);
- void *info;
- atomic_t started;
- atomic_t finished;
- int wait;
-} *call_data;
-
-/* delay of at least 8 seconds on 1GHz cpu */
-#define SMP_CALL_TIMEOUT (1UL << (30 + 3))
-
-/*
- * This function sends a 'generic call function' IPI to all other CPUs
- * in the system.
- *
- * [SUMMARY] Run a function on all other CPUs.
- * <func> The function to run. This must be fast and non-blocking.
- * <info> An arbitrary pointer to pass to the function.
- * <nonatomic> currently unused.
- * <wait> If true, wait (atomically) until function has completed on other CPUs.
- * [RETURNS] 0 on success, else a negative status code. Does not return until
- * remote CPUs are nearly ready to execute <<func>> or are or have executed.
- *
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-int smp_call_function (void (*func) (void *info), void *info, int nonatomic,
- int wait)
-{
- struct call_data_struct data;
- int ret = -1, cpus;
- unsigned long timeout;
-
- /* Can deadlock when called with interrupts disabled */
- WARN_ON(irqs_disabled());
-
- data.func = func;
- data.info = info;
- atomic_set(&data.started, 0);
- data.wait = wait;
- if (wait)
- atomic_set(&data.finished, 0);
-
- spin_lock(&call_lock);
- /* Must grab online cpu count with preempt disabled, otherwise
- * it can change. */
- cpus = num_online_cpus() - 1;
- if (!cpus) {
- ret = 0;
- goto out;
- }
-
- call_data = &data;
- smp_wmb();
- /* Send a message to all other CPUs and wait for them to respond */
- smp_ops->message_pass(MSG_ALL_BUT_SELF, PPC_MSG_CALL_FUNCTION);
-
- /* Wait for response */
- timeout = SMP_CALL_TIMEOUT;
- while (atomic_read(&data.started) != cpus) {
- HMT_low();
- if (--timeout == 0) {
- printk("smp_call_function on cpu %d: other cpus not "
- "responding (%d)\n", smp_processor_id(),
- atomic_read(&data.started));
- debugger(NULL);
- goto out;
- }
- }
-
- if (wait) {
- timeout = SMP_CALL_TIMEOUT;
- while (atomic_read(&data.finished) != cpus) {
- HMT_low();
- if (--timeout == 0) {
- printk("smp_call_function on cpu %d: other "
- "cpus not finishing (%d/%d)\n",
- smp_processor_id(),
- atomic_read(&data.finished),
- atomic_read(&data.started));
- debugger(NULL);
- goto out;
- }
- }
- }
-
- ret = 0;
-
-out:
- call_data = NULL;
- HMT_medium();
- spin_unlock(&call_lock);
- return ret;
-}
-
-EXPORT_SYMBOL(smp_call_function);
-
-void smp_call_function_interrupt(void)
-{
- void (*func) (void *info);
- void *info;
- int wait;
-
- /* call_data will be NULL if the sender timed out while
- * waiting on us to receive the call.
- */
- if (!call_data)
- return;
-
- func = call_data->func;
- info = call_data->info;
- wait = call_data->wait;
-
- if (!wait)
- smp_mb__before_atomic_inc();
-
- /*
- * Notify initiating CPU that I've grabbed the data and am
- * about to execute the function
- */
- atomic_inc(&call_data->started);
- /*
- * At this point the info structure may be out of scope unless wait==1
- */
- (*func)(info);
- if (wait) {
- smp_mb__before_atomic_inc();
- atomic_inc(&call_data->finished);
- }
-}
-
-extern struct gettimeofday_struct do_gtod;
-
-struct thread_info *current_set[NR_CPUS];
-
-DECLARE_PER_CPU(unsigned int, pvr);
-
-static void __devinit smp_store_cpu_info(int id)
-{
- per_cpu(pvr, id) = mfspr(SPRN_PVR);
-}
-
-static void __init smp_create_idle(unsigned int cpu)
-{
- struct task_struct *p;
-
- /* create a process for the processor */
- p = fork_idle(cpu);
- if (IS_ERR(p))
- panic("failed fork for CPU %u: %li", cpu, PTR_ERR(p));
- paca[cpu].__current = p;
- current_set[cpu] = p->thread_info;
-}
-
-void __init smp_prepare_cpus(unsigned int max_cpus)
-{
- unsigned int cpu;
-
- DBG("smp_prepare_cpus\n");
-
- /*
- * setup_cpu may need to be called on the boot cpu. We havent
- * spun any cpus up but lets be paranoid.
- */
- BUG_ON(boot_cpuid != smp_processor_id());
-
- /* Fixup boot cpu */
- smp_store_cpu_info(boot_cpuid);
- cpu_callin_map[boot_cpuid] = 1;
-
-#ifndef CONFIG_PPC_ISERIES
- paca[boot_cpuid].next_jiffy_update_tb = tb_last_stamp = get_tb();
-
- /*
- * Should update do_gtod.stamp_xsec.
- * For now we leave it which means the time can be some
- * number of msecs off until someone does a settimeofday()
- */
- do_gtod.varp->tb_orig_stamp = tb_last_stamp;
- systemcfg->tb_orig_stamp = tb_last_stamp;
-#endif
-
- max_cpus = smp_ops->probe();
-
- smp_space_timers(max_cpus);
-
- for_each_cpu(cpu)
- if (cpu != boot_cpuid)
- smp_create_idle(cpu);
-}
-
-void __devinit smp_prepare_boot_cpu(void)
-{
- BUG_ON(smp_processor_id() != boot_cpuid);
-
- cpu_set(boot_cpuid, cpu_online_map);
-
- paca[boot_cpuid].__current = current;
- current_set[boot_cpuid] = current->thread_info;
-}
-
-#ifdef CONFIG_HOTPLUG_CPU
-/* State of each CPU during hotplug phases */
-DEFINE_PER_CPU(int, cpu_state) = { 0 };
-
-int generic_cpu_disable(void)
-{
- unsigned int cpu = smp_processor_id();
-
- if (cpu == boot_cpuid)
- return -EBUSY;
-
- systemcfg->processorCount--;
- cpu_clear(cpu, cpu_online_map);
- fixup_irqs(cpu_online_map);
- return 0;
-}
-
-int generic_cpu_enable(unsigned int cpu)
-{
- /* Do the normal bootup if we haven't
- * already bootstrapped. */
- if (system_state != SYSTEM_RUNNING)
- return -ENOSYS;
-
- /* get the target out of it's holding state */
- per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
- smp_wmb();
-
- while (!cpu_online(cpu))
- cpu_relax();
-
- fixup_irqs(cpu_online_map);
- /* counter the irq disable in fixup_irqs */
- local_irq_enable();
- return 0;
-}
-
-void generic_cpu_die(unsigned int cpu)
-{
- int i;
-
- for (i = 0; i < 100; i++) {
- smp_rmb();
- if (per_cpu(cpu_state, cpu) == CPU_DEAD)
- return;
- msleep(100);
- }
- printk(KERN_ERR "CPU%d didn't die...\n", cpu);
-}
-
-void generic_mach_cpu_die(void)
-{
- unsigned int cpu;
-
- local_irq_disable();
- cpu = smp_processor_id();
- printk(KERN_DEBUG "CPU%d offline\n", cpu);
- __get_cpu_var(cpu_state) = CPU_DEAD;
- smp_wmb();
- while (__get_cpu_var(cpu_state) != CPU_UP_PREPARE)
- cpu_relax();
-
- flush_tlb_pending();
- cpu_set(cpu, cpu_online_map);
- local_irq_enable();
-}
-#endif
-
-static int __devinit cpu_enable(unsigned int cpu)
-{
- if (smp_ops->cpu_enable)
- return smp_ops->cpu_enable(cpu);
-
- return -ENOSYS;
-}
-
-int __devinit __cpu_up(unsigned int cpu)
-{
- int c;
-
- if (!cpu_enable(cpu))
- return 0;
-
- if (smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu))
- return -EINVAL;
-
- paca[cpu].default_decr = tb_ticks_per_jiffy;
-
- /* Make sure callin-map entry is 0 (can be leftover a CPU
- * hotplug
- */
- cpu_callin_map[cpu] = 0;
-
- /* The information for processor bringup must
- * be written out to main store before we release
- * the processor.
- */
- smp_mb();
-
- /* wake up cpus */
- DBG("smp: kicking cpu %d\n", cpu);
- smp_ops->kick_cpu(cpu);
-
- /*
- * wait to see if the cpu made a callin (is actually up).
- * use this value that I found through experimentation.
- * -- Cort
- */
- if (system_state < SYSTEM_RUNNING)
- for (c = 5000; c && !cpu_callin_map[cpu]; c--)
- udelay(100);
-#ifdef CONFIG_HOTPLUG_CPU
- else
- /*
- * CPUs can take much longer to come up in the
- * hotplug case. Wait five seconds.
- */
- for (c = 25; c && !cpu_callin_map[cpu]; c--) {
- msleep(200);
- }
-#endif
-
- if (!cpu_callin_map[cpu]) {
- printk("Processor %u is stuck.\n", cpu);
- return -ENOENT;
- }
-
- printk("Processor %u found.\n", cpu);
-
- if (smp_ops->give_timebase)
- smp_ops->give_timebase();
-
- /* Wait until cpu puts itself in the online map */
- while (!cpu_online(cpu))
- cpu_relax();
-
- return 0;
-}
-
-
-/* Activate a secondary processor. */
-int __devinit start_secondary(void *unused)
-{
- unsigned int cpu = smp_processor_id();
-
- atomic_inc(&init_mm.mm_count);
- current->active_mm = &init_mm;
-
- smp_store_cpu_info(cpu);
- set_dec(paca[cpu].default_decr);
- cpu_callin_map[cpu] = 1;
-
- smp_ops->setup_cpu(cpu);
- if (smp_ops->take_timebase)
- smp_ops->take_timebase();
-
- spin_lock(&call_lock);
- cpu_set(cpu, cpu_online_map);
- spin_unlock(&call_lock);
-
- local_irq_enable();
-
- cpu_idle();
- return 0;
-}
-
-int setup_profiling_timer(unsigned int multiplier)
-{
- return 0;
-}
-
-void __init smp_cpus_done(unsigned int max_cpus)
-{
- cpumask_t old_mask;
-
- /* We want the setup_cpu() here to be called from CPU 0, but our
- * init thread may have been "borrowed" by another CPU in the meantime
- * se we pin us down to CPU 0 for a short while
- */
- old_mask = current->cpus_allowed;
- set_cpus_allowed(current, cpumask_of_cpu(boot_cpuid));
-
- smp_ops->setup_cpu(boot_cpuid);
-
- set_cpus_allowed(current, old_mask);
-}
-
-#ifdef CONFIG_HOTPLUG_CPU
-int __cpu_disable(void)
-{
- if (smp_ops->cpu_disable)
- return smp_ops->cpu_disable();
-
- return -ENOSYS;
-}
-
-void __cpu_die(unsigned int cpu)
-{
- if (smp_ops->cpu_die)
- smp_ops->cpu_die(cpu);
-}
-#endif
--- /dev/null
+/*
+ * smp.h: PowerPC-specific SMP code.
+ *
+ * Original was a copy of sparc smp.h. Now heavily modified
+ * for PPC.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
+ *
+ * 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.
+ */
+
+#ifndef _ASM_POWERPC_SMP_H
+#define _ASM_POWERPC_SMP_H
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <linux/kernel.h>
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_PPC64
+#include <asm/paca.h>
+#endif
+
+extern int boot_cpuid;
+extern int boot_cpuid_phys;
+
+extern void cpu_die(void);
+
+#ifdef CONFIG_SMP
+
+extern void smp_send_debugger_break(int cpu);
+struct pt_regs;
+extern void smp_message_recv(int, struct pt_regs *);
+
+#ifdef CONFIG_HOTPLUG_CPU
+extern void fixup_irqs(cpumask_t map);
+int generic_cpu_disable(void);
+int generic_cpu_enable(unsigned int cpu);
+void generic_cpu_die(unsigned int cpu);
+void generic_mach_cpu_die(void);
+#endif
+
+#ifdef CONFIG_PPC64
+#define raw_smp_processor_id() (get_paca()->paca_index)
+#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
+#else
+/* 32-bit */
+extern int smp_hw_index[];
+
+#define raw_smp_processor_id() (current_thread_info()->cpu)
+#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
+#define get_hard_smp_processor_id(cpu) (smp_hw_index[(cpu)])
+#define set_hard_smp_processor_id(cpu, phys)\
+ (smp_hw_index[(cpu)] = (phys))
+#endif
+
+extern cpumask_t cpu_sibling_map[NR_CPUS];
+
+/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
+ *
+ * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
+ * in /proc/interrupts will be wrong!!! --Troy */
+#define PPC_MSG_CALL_FUNCTION 0
+#define PPC_MSG_RESCHEDULE 1
+/* This is unused now */
+#if 0
+#define PPC_MSG_MIGRATE_TASK 2
+#endif
+#define PPC_MSG_DEBUGGER_BREAK 3
+
+void smp_init_iSeries(void);
+void smp_init_pSeries(void);
+void smp_init_cell(void);
+void smp_setup_cpu_maps(void);
+
+extern int __cpu_disable(void);
+extern void __cpu_die(unsigned int cpu);
+
+#else
+/* for UP */
+#define smp_setup_cpu_maps()
+#define smp_release_cpus()
+
+#endif /* CONFIG_SMP */
+
+#ifdef CONFIG_PPC64
+#define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
+#define set_hard_smp_processor_id(CPU, VAL) \
+ do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
+#else
+/* 32-bit */
+#ifndef CONFIG_SMP
+#define get_hard_smp_processor_id(cpu) boot_cpuid_phys
+#define set_hard_smp_processor_id(cpu, phys)
+#endif
+#endif
+
+extern int smt_enabled_at_boot;
+
+extern int smp_mpic_probe(void);
+extern void smp_mpic_setup_cpu(int cpu);
+extern void smp_generic_kick_cpu(int nr);
+
+extern void smp_generic_give_timebase(void);
+extern void smp_generic_take_timebase(void);
+
+extern struct smp_ops_t *smp_ops;
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_SMP_H) */
+++ /dev/null
-/*
- * smp.h: PPC64 specific SMP code.
- *
- * Original was a copy of sparc smp.h. Now heavily modified
- * for PPC.
- *
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
- *
- * 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.
- */
-
-#ifdef __KERNEL__
-#ifndef _PPC64_SMP_H
-#define _PPC64_SMP_H
-
-#include <linux/config.h>
-#include <linux/threads.h>
-#include <linux/cpumask.h>
-#include <linux/kernel.h>
-
-#ifndef __ASSEMBLY__
-
-#include <asm/paca.h>
-
-extern int boot_cpuid;
-extern int boot_cpuid_phys;
-
-extern void cpu_die(void);
-
-#ifdef CONFIG_SMP
-
-extern void smp_send_debugger_break(int cpu);
-struct pt_regs;
-extern void smp_message_recv(int, struct pt_regs *);
-
-#ifdef CONFIG_HOTPLUG_CPU
-extern void fixup_irqs(cpumask_t map);
-int generic_cpu_disable(void);
-int generic_cpu_enable(unsigned int cpu);
-void generic_cpu_die(unsigned int cpu);
-void generic_mach_cpu_die(void);
-#endif
-
-#define raw_smp_processor_id() (get_paca()->paca_index)
-#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
-
-extern cpumask_t cpu_sibling_map[NR_CPUS];
-
-/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
- *
- * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
- * in /proc/interrupts will be wrong!!! --Troy */
-#define PPC_MSG_CALL_FUNCTION 0
-#define PPC_MSG_RESCHEDULE 1
-/* This is unused now */
-#if 0
-#define PPC_MSG_MIGRATE_TASK 2
-#endif
-#define PPC_MSG_DEBUGGER_BREAK 3
-
-void smp_init_iSeries(void);
-void smp_init_pSeries(void);
-void smp_init_cell(void);
-
-extern int __cpu_disable(void);
-extern void __cpu_die(unsigned int cpu);
-#endif /* CONFIG_SMP */
-
-#define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
-#define set_hard_smp_processor_id(CPU, VAL) \
- do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
-
-extern int smt_enabled_at_boot;
-
-extern int smp_mpic_probe(void);
-extern void smp_mpic_setup_cpu(int cpu);
-extern void smp_generic_kick_cpu(int nr);
-extern void smp_release_cpus(void);
-
-extern void smp_generic_give_timebase(void);
-extern void smp_generic_take_timebase(void);
-
-extern struct smp_ops_t *smp_ops;
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* !(_PPC64_SMP_H) */
-#endif /* __KERNEL__ */
projects / deliverable / linux.git / commitdiff
