**
** Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
** Copyright (C) 1999 David Mosberger-Tang <davidm@hpl.hp.com>
-** Copyright (C) 2001 Grant Grundler <grundler@parisc-linux.org>
+** Copyright (C) 2001,2004 Grant Grundler <grundler@parisc-linux.org>
**
** Lots of stuff stolen from arch/alpha/kernel/smp.c
** ...and then parisc stole from arch/ia64/kernel/smp.c. Thanks David! :^)
**
-** Thanks to John Curry and Ullas Ponnadi. I learned alot from their work.
+** Thanks to John Curry and Ullas Ponnadi. I learned a lot from their work.
** -grant (1/12/2001)
**
** This program is free software; you can redistribute it and/or modify
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
*/
-#undef ENTRY_SYS_CPUS /* syscall support for iCOD-like functionality */
-
-#include <linux/autoconf.h>
-
#include <linux/types.h>
#include <linux/spinlock.h>
-#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/smp.h>
#include <linux/kernel_stat.h>
#include <linux/mm.h>
+#include <linux/err.h>
#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/ftrace.h>
+#include <linux/cpu.h>
-#include <asm/system.h>
-#include <asm/atomic.h>
-#include <asm/bitops.h>
+#include <linux/atomic.h>
#include <asm/current.h>
#include <asm/delay.h>
-#include <asm/pgalloc.h> /* for flush_tlb_all() proto/macro */
+#include <asm/tlbflush.h>
#include <asm/io.h>
#include <asm/irq.h> /* for CPU_IRQ_REGION and friends */
#include <asm/unistd.h>
#include <asm/cacheflush.h>
-#define kDEBUG 0
-
-spinlock_t pa_dbit_lock = SPIN_LOCK_UNLOCKED;
-
-spinlock_t smp_lock = SPIN_LOCK_UNLOCKED;
+#undef DEBUG_SMP
+#ifdef DEBUG_SMP
+static int smp_debug_lvl = 0;
+#define smp_debug(lvl, printargs...) \
+ if (lvl >= smp_debug_lvl) \
+ printk(printargs);
+#else
+#define smp_debug(lvl, ...) do { } while(0)
+#endif /* DEBUG_SMP */
volatile struct task_struct *smp_init_current_idle_task;
-static volatile int smp_commenced = 0; /* Set when the idlers are all forked */
-static volatile int cpu_now_booting = 0; /* track which CPU is booting */
-cpumask_t cpu_online_map = CPU_MASK_NONE; /* Bitmap of online CPUs */
-#define IS_LOGGED_IN(cpunum) (cpu_isset(cpunum, cpu_online_map))
+/* track which CPU is booting */
+static volatile int cpu_now_booting __cpuinitdata;
-EXPORT_SYMBOL(cpu_online_map);
+static int parisc_max_cpus __cpuinitdata = 1;
-int smp_num_cpus = 1;
-int smp_threads_ready = 0;
-unsigned long cache_decay_ticks;
-static int max_cpus = -1; /* Command line */
-cpumask_t cpu_present_mask;
-
-EXPORT_SYMBOL(cpu_present_mask);
-
-struct smp_call_struct {
- void (*func) (void *info);
- void *info;
- long wait;
- atomic_t unstarted_count;
- atomic_t unfinished_count;
-};
-static volatile struct smp_call_struct *smp_call_function_data;
+static DEFINE_PER_CPU(spinlock_t, ipi_lock);
enum ipi_message_type {
IPI_NOP=0,
IPI_RESCHEDULE=1,
IPI_CALL_FUNC,
+ IPI_CALL_FUNC_SINGLE,
IPI_CPU_START,
IPI_CPU_STOP,
IPI_CPU_TEST
static void
ipi_init(int cpuid)
{
-
- /* If CPU is present ... */
-#ifdef ENTRY_SYS_CPUS
- /* *and* running (not stopped) ... */
-#error iCOD support wants state checked here.
-#endif
-
#error verify IRQ_OFFSET(IPI_IRQ) is ipi_interrupt() in new IRQ region
- if(IS_LOGGED_IN(cpuid) )
+ if(cpu_online(cpuid) )
{
switch_to_idle_task(current);
}
static void
halt_processor(void)
{
-#ifdef ENTRY_SYS_CPUS
-#error halt_processor() needs rework
-/*
-** o migrate I/O interrupts off this CPU.
-** o leave IPI enabled - __cli() will disable IPI.
-** o leave CPU in online map - just change the state
-*/
- cpu_data[this_cpu].state = STATE_STOPPED;
- mark_bh(IPI_BH);
-#else
/* REVISIT : redirect I/O Interrupts to another CPU? */
/* REVISIT : does PM *know* this CPU isn't available? */
- cpu_clear(smp_processor_id(), cpu_online_map);
+ set_cpu_online(smp_processor_id(), false);
local_irq_disable();
for (;;)
;
-#endif
}
-irqreturn_t
-ipi_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t __irq_entry
+ipi_interrupt(int irq, void *dev_id)
{
int this_cpu = smp_processor_id();
- struct cpuinfo_parisc *p = &cpu_data[this_cpu];
+ struct cpuinfo_parisc *p = &per_cpu(cpu_data, this_cpu);
unsigned long ops;
unsigned long flags;
mb(); /* Order interrupt and bit testing. */
for (;;) {
- spin_lock_irqsave(&(p->lock),flags);
+ spinlock_t *lock = &per_cpu(ipi_lock, this_cpu);
+ spin_lock_irqsave(lock, flags);
ops = p->pending_ipi;
p->pending_ipi = 0;
- spin_unlock_irqrestore(&(p->lock),flags);
+ spin_unlock_irqrestore(lock, flags);
mb(); /* Order bit clearing and data access. */
while (ops) {
unsigned long which = ffz(~ops);
+ ops &= ~(1 << which);
+
switch (which) {
+ case IPI_NOP:
+ smp_debug(100, KERN_DEBUG "CPU%d IPI_NOP\n", this_cpu);
+ break;
+
case IPI_RESCHEDULE:
-#if (kDEBUG>=100)
- printk(KERN_DEBUG "CPU%d IPI_RESCHEDULE\n",this_cpu);
-#endif /* kDEBUG */
- ops &= ~(1 << IPI_RESCHEDULE);
- /*
- * Reschedule callback. Everything to be
- * done is done by the interrupt return path.
- */
+ smp_debug(100, KERN_DEBUG "CPU%d IPI_RESCHEDULE\n", this_cpu);
+ scheduler_ipi();
break;
case IPI_CALL_FUNC:
-#if (kDEBUG>=100)
- printk(KERN_DEBUG "CPU%d IPI_CALL_FUNC\n",this_cpu);
-#endif /* kDEBUG */
- ops &= ~(1 << IPI_CALL_FUNC);
- {
- volatile struct smp_call_struct *data;
- void (*func)(void *info);
- void *info;
- int wait;
-
- data = smp_call_function_data;
- func = data->func;
- info = data->info;
- wait = data->wait;
-
- mb();
- atomic_dec ((atomic_t *)&data->unstarted_count);
-
- /* At this point, *data can't
- * be relied upon.
- */
-
- (*func)(info);
-
- /* Notify the sending CPU that the
- * task is done.
- */
- mb();
- if (wait)
- atomic_dec ((atomic_t *)&data->unfinished_count);
- }
+ smp_debug(100, KERN_DEBUG "CPU%d IPI_CALL_FUNC\n", this_cpu);
+ generic_smp_call_function_interrupt();
+ break;
+
+ case IPI_CALL_FUNC_SINGLE:
+ smp_debug(100, KERN_DEBUG "CPU%d IPI_CALL_FUNC_SINGLE\n", this_cpu);
+ generic_smp_call_function_single_interrupt();
break;
case IPI_CPU_START:
-#if (kDEBUG>=100)
- printk(KERN_DEBUG "CPU%d IPI_CPU_START\n",this_cpu);
-#endif /* kDEBUG */
- ops &= ~(1 << IPI_CPU_START);
-#ifdef ENTRY_SYS_CPUS
- p->state = STATE_RUNNING;
-#endif
+ smp_debug(100, KERN_DEBUG "CPU%d IPI_CPU_START\n", this_cpu);
break;
case IPI_CPU_STOP:
-#if (kDEBUG>=100)
- printk(KERN_DEBUG "CPU%d IPI_CPU_STOP\n",this_cpu);
-#endif /* kDEBUG */
- ops &= ~(1 << IPI_CPU_STOP);
-#ifdef ENTRY_SYS_CPUS
-#else
+ smp_debug(100, KERN_DEBUG "CPU%d IPI_CPU_STOP\n", this_cpu);
halt_processor();
-#endif
break;
case IPI_CPU_TEST:
-#if (kDEBUG>=100)
- printk(KERN_DEBUG "CPU%d is alive!\n",this_cpu);
-#endif /* kDEBUG */
- ops &= ~(1 << IPI_CPU_TEST);
+ smp_debug(100, KERN_DEBUG "CPU%d is alive!\n", this_cpu);
break;
default:
printk(KERN_CRIT "Unknown IPI num on CPU%d: %lu\n",
this_cpu, which);
- ops &= ~(1 << which);
return IRQ_NONE;
} /* Switch */
+ /* let in any pending interrupts */
+ local_irq_enable();
+ local_irq_disable();
} /* while (ops) */
}
return IRQ_HANDLED;
static inline void
ipi_send(int cpu, enum ipi_message_type op)
{
- struct cpuinfo_parisc *p = &cpu_data[cpu];
+ struct cpuinfo_parisc *p = &per_cpu(cpu_data, cpu);
+ spinlock_t *lock = &per_cpu(ipi_lock, cpu);
unsigned long flags;
- spin_lock_irqsave(&(p->lock),flags);
+ spin_lock_irqsave(lock, flags);
p->pending_ipi |= 1 << op;
- __raw_writel(IRQ_OFFSET(IPI_IRQ), cpu_data[cpu].hpa);
- spin_unlock_irqrestore(&(p->lock),flags);
+ gsc_writel(IPI_IRQ - CPU_IRQ_BASE, p->hpa);
+ spin_unlock_irqrestore(lock, flags);
}
+static void
+send_IPI_mask(const struct cpumask *mask, enum ipi_message_type op)
+{
+ int cpu;
+
+ for_each_cpu(cpu, mask)
+ ipi_send(cpu, op);
+}
static inline void
send_IPI_single(int dest_cpu, enum ipi_message_type op)
{
- if (dest_cpu == NO_PROC_ID) {
- BUG();
- return;
- }
+ BUG_ON(dest_cpu == NO_PROC_ID);
ipi_send(dest_cpu, op);
}
{
int i;
- for (i = 0; i < smp_num_cpus; i++) {
+ for_each_online_cpu(i) {
if (i != smp_processor_id())
send_IPI_single(i, op);
}
}
+
inline void
smp_send_stop(void) { send_IPI_allbutself(IPI_CPU_STOP); }
void
smp_send_reschedule(int cpu) { send_IPI_single(cpu, IPI_RESCHEDULE); }
-
-/**
- * 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.
- * <retry> If true, keep retrying until ready.
- * <wait> If true, wait 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 have executed.
- */
-
-int
-smp_call_function (void (*func) (void *info), void *info, int retry, int wait)
+void
+smp_send_all_nop(void)
{
- struct smp_call_struct data;
- unsigned long timeout;
- static spinlock_t lock = SPIN_LOCK_UNLOCKED;
-
- data.func = func;
- data.info = info;
- data.wait = wait;
- atomic_set(&data.unstarted_count, smp_num_cpus - 1);
- atomic_set(&data.unfinished_count, smp_num_cpus - 1);
-
- if (retry) {
- spin_lock (&lock);
- while (smp_call_function_data != 0)
- barrier();
- }
- else {
- spin_lock (&lock);
- if (smp_call_function_data) {
- spin_unlock (&lock);
- return -EBUSY;
- }
- }
-
- smp_call_function_data = &data;
- spin_unlock (&lock);
-
- /* Send a message to all other CPUs and wait for them to respond */
- send_IPI_allbutself(IPI_CALL_FUNC);
-
- /* Wait for response */
- timeout = jiffies + HZ;
- while ( (atomic_read (&data.unstarted_count) > 0) &&
- time_before (jiffies, timeout) )
- barrier ();
-
- /* We either got one or timed out. Release the lock */
-
- mb();
- smp_call_function_data = NULL;
- if (atomic_read (&data.unstarted_count) > 0) {
- printk(KERN_CRIT "SMP CALL FUNCTION TIMED OUT! (cpu=%d)\n",
- smp_processor_id());
- return -ETIMEDOUT;
- }
-
- while (wait && atomic_read (&data.unfinished_count) > 0)
- barrier ();
-
- return 0;
+ send_IPI_allbutself(IPI_NOP);
}
-EXPORT_SYMBOL(smp_call_function);
-
-
-
-/*
- * Setup routine for controlling SMP activation
- *
- * Command-line option of "nosmp" or "maxcpus=0" will disable SMP
- * activation entirely (the MPS table probe still happens, though).
- *
- * Command-line option of "maxcpus=<NUM>", where <NUM> is an integer
- * greater than 0, limits the maximum number of CPUs activated in
- * SMP mode to <NUM>.
- */
-
-static int __init nosmp(char *str)
+void arch_send_call_function_ipi_mask(const struct cpumask *mask)
{
- max_cpus = 0;
- return 1;
+ send_IPI_mask(mask, IPI_CALL_FUNC);
}
-__setup("nosmp", nosmp);
-
-static int __init maxcpus(char *str)
+void arch_send_call_function_single_ipi(int cpu)
{
- get_option(&str, &max_cpus);
- return 1;
+ send_IPI_single(cpu, IPI_CALL_FUNC_SINGLE);
}
-__setup("maxcpus=", maxcpus);
-
/*
* Flush all other CPU's tlb and then mine. Do this with on_each_cpu()
* as we want to ensure all TLB's flushed before proceeding.
*/
-extern void flush_tlb_all_local(void);
-
void
smp_flush_tlb_all(void)
{
- on_each_cpu((void (*)(void *))flush_tlb_all_local, NULL, 1, 1);
-}
-
-
-void
-smp_do_timer(struct pt_regs *regs)
-{
- int cpu = smp_processor_id();
- struct cpuinfo_parisc *data = &cpu_data[cpu];
-
- if (!--data->prof_counter) {
- data->prof_counter = data->prof_multiplier;
- update_process_times(user_mode(regs));
- }
+ on_each_cpu(flush_tlb_all_local, NULL, 1);
}
/*
static void __init
smp_cpu_init(int cpunum)
{
- extern int init_per_cpu(int); /* arch/parisc/kernel/setup.c */
+ extern int init_per_cpu(int); /* arch/parisc/kernel/processor.c */
extern void init_IRQ(void); /* arch/parisc/kernel/irq.c */
+ extern void start_cpu_itimer(void); /* arch/parisc/kernel/time.c */
/* Set modes and Enable floating point coprocessor */
(void) init_per_cpu(cpunum);
mb();
/* Well, support 2.4 linux scheme as well. */
- if (cpu_test_and_set(cpunum, cpu_online_map))
- {
+ if (cpu_online(cpunum)) {
extern void machine_halt(void); /* arch/parisc.../process.c */
printk(KERN_CRIT "CPU#%d already initialized!\n", cpunum);
machine_halt();
- }
+ }
+
+ notify_cpu_starting(cpunum);
+
+ ipi_call_lock();
+ set_cpu_online(cpunum, true);
+ ipi_call_unlock();
/* Initialise the idle task for this CPU */
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
- if(current->mm)
- BUG();
+ BUG_ON(current->mm);
enter_lazy_tlb(&init_mm, current);
- init_IRQ(); /* make sure no IRQ's are enabled or pending */
+ init_IRQ(); /* make sure no IRQs are enabled or pending */
+ start_cpu_itimer();
}
*/
void __init smp_callin(void)
{
- extern void cpu_idle(void); /* arch/parisc/kernel/process.c */
int slave_id = cpu_now_booting;
-#if 0
- void *istack;
-#endif
smp_cpu_init(slave_id);
-
-#if 0 /* NOT WORKING YET - see entry.S */
- istack = (void *)__get_free_pages(GFP_KERNEL,ISTACK_ORDER);
- if (istack == NULL) {
- printk(KERN_CRIT "Failed to allocate interrupt stack for cpu %d\n",slave_id);
- BUG();
- }
- mtctl(istack,31);
-#endif
+ preempt_disable();
flush_cache_all_local(); /* start with known state */
- flush_tlb_all_local();
+ flush_tlb_all_local(NULL);
local_irq_enable(); /* Interrupts have been off until now */
- /* Slaves wait here until Big Poppa daddy say "jump" */
- mb(); /* PARANOID */
- while (!smp_commenced) ;
- mb(); /* PARANOID */
-
cpu_idle(); /* Wait for timer to schedule some work */
/* NOTREACHED */
}
/*
- * Create the idle task for a new Slave CPU. DO NOT use kernel_thread()
- * because that could end up calling schedule(). If it did, the new idle
- * task could get scheduled before we had a chance to remove it from the
- * run-queue...
- */
-static struct task_struct *fork_by_hand(void)
-{
- struct pt_regs regs;
-
- /*
- * don't care about the regs settings since
- * we'll never reschedule the forked task.
- */
- return copy_process(CLONE_VM|CLONE_IDLETASK, 0, ®s, 0, NULL, NULL);
-}
-
-
-/*
* Bring one cpu online.
*/
-static int __init smp_boot_one_cpu(int cpuid, int cpunum)
+int __cpuinit smp_boot_one_cpu(int cpuid)
{
+ const struct cpuinfo_parisc *p = &per_cpu(cpu_data, cpuid);
struct task_struct *idle;
long timeout;
* Sheesh . . .
*/
- idle = fork_by_hand();
+ idle = fork_idle(cpuid);
if (IS_ERR(idle))
panic("SMP: fork failed for CPU:%d", cpuid);
- wake_up_forked_process(idle);
- init_idle(idle, cpunum);
- unhash_process(idle);
- idle->thread_info->cpu = cpunum;
+ task_thread_info(idle)->cpu = cpuid;
/* Let _start know what logical CPU we're booting
** (offset into init_tasks[],cpu_data[])
*/
- cpu_now_booting = cpunum;
+ cpu_now_booting = cpuid;
/*
** boot strap code needs to know the task address since
smp_init_current_idle_task = idle ;
mb();
+ printk(KERN_INFO "Releasing cpu %d now, hpa=%lx\n", cpuid, p->hpa);
+
/*
** This gets PDC to release the CPU from a very tight loop.
- ** See MEM_RENDEZ comments in head.S.
+ **
+ ** From the PA-RISC 2.0 Firmware Architecture Reference Specification:
+ ** "The MEM_RENDEZ vector specifies the location of OS_RENDEZ which
+ ** is executed after receiving the rendezvous signal (an interrupt to
+ ** EIR{0}). MEM_RENDEZ is valid only when it is nonzero and the
+ ** contents of memory are valid."
*/
- __raw_writel(IRQ_OFFSET(TIMER_IRQ), cpu_data[cpunum].hpa);
+ gsc_writel(TIMER_IRQ - CPU_IRQ_BASE, p->hpa);
mb();
/*
* OK, wait a bit for that CPU to finish staggering about.
- * Slave will set a bit when it reaches smp_cpu_init() and then
- * wait for smp_commenced to be 1.
- * Once we see the bit change, we can move on.
+ * Slave will set a bit when it reaches smp_cpu_init().
+ * Once the "monarch CPU" sees the bit change, it can move on.
*/
for (timeout = 0; timeout < 10000; timeout++) {
- if(IS_LOGGED_IN(cpunum)) {
+ if(cpu_online(cpuid)) {
/* Which implies Slave has started up */
cpu_now_booting = 0;
smp_init_current_idle_task = NULL;
alive:
/* Remember the Slave data */
-#if (kDEBUG>=100)
- printk(KERN_DEBUG "SMP: CPU:%d (num %d) came alive after %ld _us\n",
- cpuid, cpunum, timeout * 100);
-#endif /* kDEBUG */
-#ifdef ENTRY_SYS_CPUS
- cpu_data[cpunum].state = STATE_RUNNING;
-#endif
+ smp_debug(100, KERN_DEBUG "SMP: CPU:%d came alive after %ld _us\n",
+ cpuid, timeout * 100);
return 0;
}
-
-
-
-/*
-** inventory.c:do_inventory() has already 'discovered' the additional CPU's.
-** We are ready to wrest them from PDC's control now.
-** Called by smp_init bring all the secondaries online and hold them.
-**
-** o Setup of the IPI irq handler is done in irq.c.
-** o MEM_RENDEZ is initialzed in head.S:stext()
-**
-*/
-void __init smp_boot_cpus(void)
+void __init smp_prepare_boot_cpu(void)
{
- int i, cpu_count = 1;
- unsigned long bogosum = cpu_data[0].loops_per_jiffy; /* Count Monarch */
-
- /* REVISIT - assumes first CPU reported by PAT PDC is BSP */
- int bootstrap_processor=cpu_data[0].cpuid; /* CPU ID of BSP */
+ int bootstrap_processor = per_cpu(cpu_data, 0).cpuid;
/* Setup BSP mappings */
- printk(KERN_DEBUG "SMP: bootstrap CPU ID is %d\n",bootstrap_processor);
- init_task.thread_info->cpu = bootstrap_processor;
- current->thread_info->cpu = bootstrap_processor;
- /* Mark Boostrap processor as present */
- cpu_online_map = cpumask_of_cpu(bootstrap_processor);
- current->active_mm = &init_mm;
+ printk(KERN_INFO "SMP: bootstrap CPU ID is %d\n", bootstrap_processor);
-#ifdef ENTRY_SYS_CPUS
- cpu_data[0].state = STATE_RUNNING;
-#endif
- cpu_present_mask = cpumask_of_cpu(bootstrap_processor);
-
- /* Nothing to do when told not to. */
- if (max_cpus == 0) {
- printk(KERN_INFO "SMP mode deactivated.\n");
- return;
- }
-
- if (max_cpus != -1)
- printk(KERN_INFO "Limiting CPUs to %d\n", max_cpus);
-
- /* We found more than one CPU.... */
- if (boot_cpu_data.cpu_count > 1) {
+ set_cpu_online(bootstrap_processor, true);
+ set_cpu_present(bootstrap_processor, true);
+}
- for (i = 0; i < NR_CPUS; i++) {
- if (cpu_data[i].cpuid == NO_PROC_ID ||
- cpu_data[i].cpuid == bootstrap_processor)
- continue;
- if (smp_boot_one_cpu(cpu_data[i].cpuid, cpu_count) < 0)
- continue;
- bogosum += cpu_data[i].loops_per_jiffy;
- cpu_count++; /* Count good CPUs only... */
-
- cpu_present_mask |= 1UL << i;
-
- /* Bail when we've started as many CPUS as told to */
- if (cpu_count == max_cpus)
- break;
- }
- }
- if (cpu_count == 1) {
- printk(KERN_INFO "SMP: Bootstrap processor only.\n");
- }
+/*
+** inventory.c:do_inventory() hasn't yet been run and thus we
+** don't 'discover' the additional CPUs until later.
+*/
+void __init smp_prepare_cpus(unsigned int max_cpus)
+{
+ int cpu;
- /*
- * FIXME very rough.
- */
- cache_decay_ticks = HZ/100;
+ for_each_possible_cpu(cpu)
+ spin_lock_init(&per_cpu(ipi_lock, cpu));
- printk(KERN_INFO "SMP: Total %d of %d processors activated "
- "(%lu.%02lu BogoMIPS noticed) (Present Mask: %lu).\n",
- cpu_count, boot_cpu_data.cpu_count, (bogosum + 25) / 5000,
- ((bogosum + 25) / 50) % 100, cpu_present_mask);
+ init_cpu_present(cpumask_of(0));
- smp_num_cpus = cpu_count;
-#ifdef PER_CPU_IRQ_REGION
- ipi_init();
-#endif
- return;
+ parisc_max_cpus = max_cpus;
+ if (!max_cpus)
+ printk(KERN_INFO "SMP mode deactivated.\n");
}
-/*
- * Called from main.c by Monarch Processor.
- * After this, any CPU can schedule any task.
- */
-void smp_commence(void)
-{
- smp_commenced = 1;
- mb();
- return;
-}
-/*
- * XXX FIXME : do nothing
- */
void smp_cpus_done(unsigned int cpu_max)
{
- smp_threads_ready = 1;
+ return;
}
-void __init smp_prepare_cpus(unsigned int max_cpus)
-{
- smp_boot_cpus();
-}
-void __devinit smp_prepare_boot_cpu(void)
+int __cpuinit __cpu_up(unsigned int cpu)
{
- cpu_set(smp_processor_id(), cpu_online_map);
- cpu_set(smp_processor_id(), cpu_present_mask);
-}
+ if (cpu != 0 && cpu < parisc_max_cpus)
+ smp_boot_one_cpu(cpu);
-int __devinit __cpu_up(unsigned int cpu)
-{
return cpu_online(cpu) ? 0 : -ENOSYS;
}
-
-
-#ifdef ENTRY_SYS_CPUS
-/* Code goes along with:
-** entry.s: ENTRY_NAME(sys_cpus) / * 215, for cpu stat * /
-*/
-int sys_cpus(int argc, char **argv)
-{
- int i,j=0;
- extern int current_pid(int cpu);
-
- if( argc > 2 ) {
- printk("sys_cpus:Only one argument supported\n");
- return (-1);
- }
- if ( argc == 1 ){
-
-#ifdef DUMP_MORE_STATE
- for(i=0; i<NR_CPUS; i++) {
- int cpus_per_line = 4;
- if(IS_LOGGED_IN(i)) {
- if (j++ % cpus_per_line)
- printk(" %3d",i);
- else
- printk("\n %3d",i);
- }
- }
- printk("\n");
-#else
- printk("\n 0\n");
-#endif
- } else if((argc==2) && !(strcmp(argv[1],"-l"))) {
- printk("\nCPUSTATE TASK CPUNUM CPUID HARDCPU(HPA)\n");
-#ifdef DUMP_MORE_STATE
- for(i=0;i<NR_CPUS;i++) {
- if (!IS_LOGGED_IN(i))
- continue;
- if (cpu_data[i].cpuid != NO_PROC_ID) {
- switch(cpu_data[i].state) {
- case STATE_RENDEZVOUS:
- printk("RENDEZVS ");
- break;
- case STATE_RUNNING:
- printk((current_pid(i)!=0) ? "RUNNING " : "IDLING ");
- break;
- case STATE_STOPPED:
- printk("STOPPED ");
- break;
- case STATE_HALTED:
- printk("HALTED ");
- break;
- default:
- printk("%08x?", cpu_data[i].state);
- break;
- }
- if(IS_LOGGED_IN(i)) {
- printk(" %4d",current_pid(i));
- }
- printk(" %6d",cpu_number_map(i));
- printk(" %5d",i);
- printk(" 0x%lx\n",cpu_data[i].hpa);
- }
- }
-#else
- printk("\n%s %4d 0 0 --------",
- (current->pid)?"RUNNING ": "IDLING ",current->pid);
-#endif
- } else if ((argc==2) && !(strcmp(argv[1],"-s"))) {
-#ifdef DUMP_MORE_STATE
- printk("\nCPUSTATE CPUID\n");
- for (i=0;i<NR_CPUS;i++) {
- if (!IS_LOGGED_IN(i))
- continue;
- if (cpu_data[i].cpuid != NO_PROC_ID) {
- switch(cpu_data[i].state) {
- case STATE_RENDEZVOUS:
- printk("RENDEZVS");break;
- case STATE_RUNNING:
- printk((current_pid(i)!=0) ? "RUNNING " : "IDLING");
- break;
- case STATE_STOPPED:
- printk("STOPPED ");break;
- case STATE_HALTED:
- printk("HALTED ");break;
- default:
- }
- printk(" %5d\n",i);
- }
- }
-#else
- printk("\n%s CPU0",(current->pid==0)?"RUNNING ":"IDLING ");
-#endif
- } else {
- printk("sys_cpus:Unknown request\n");
- return (-1);
- }
- return 0;
-}
-#endif /* ENTRY_SYS_CPUS */
-
#ifdef CONFIG_PROC_FS
int __init
setup_profiling_timer(unsigned int multiplier)
projects / linux-flexiantxendom0-3.2.10.git / blobdiff