*/
#undef ENTRY_SYS_CPUS /* syscall support for iCOD-like functionality */
-#include <linux/autoconf.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/kernel_stat.h>
#include <linux/mm.h>
#include <linux/delay.h>
+#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/atomic.h>
-#include <asm/bitops.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 */
#define kDEBUG 0
-spinlock_t smp_lock = SPIN_LOCK_UNLOCKED;
+DEFINE_SPINLOCK(smp_lock);
volatile struct task_struct *smp_init_current_idle_task;
-static volatile int cpu_now_booting = 0; /* track which CPU is booting */
+static volatile int cpu_now_booting __read_mostly = 0; /* track which CPU is booting */
-unsigned long cache_decay_ticks; /* declared by include/linux/sched.h */
-
-static int parisc_max_cpus = 1;
+static int parisc_max_cpus __read_mostly = 1;
/* online cpus are ones that we've managed to bring up completely
* possible cpus are all valid cpu
* empty in the beginning.
*/
-cpumask_t cpu_online_map = CPU_MASK_NONE; /* Bitmap of online CPUs */
-cpumask_t cpu_possible_map = CPU_MASK_ALL; /* Bitmap of Present CPUs */
+cpumask_t cpu_online_map __read_mostly = CPU_MASK_NONE; /* Bitmap of online CPUs */
+cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL; /* Bitmap of Present CPUs */
EXPORT_SYMBOL(cpu_online_map);
EXPORT_SYMBOL(cpu_possible_map);
irqreturn_t
-ipi_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+ipi_interrupt(int irq, void *dev_id)
{
int this_cpu = smp_processor_id();
struct cpuinfo_parisc *p = &cpu_data[this_cpu];
while (ops) {
unsigned long which = ffz(~ops);
+ ops &= ~(1 << which);
+
switch (which) {
+ case IPI_NOP:
+#if (kDEBUG>=100)
+ printk(KERN_DEBUG "CPU%d IPI_NOP\n",this_cpu);
+#endif /* kDEBUG */
+ 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.
#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);
#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
#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
halt_processor();
#if (kDEBUG>=100)
printk(KERN_DEBUG "CPU%d is alive!\n",this_cpu);
#endif /* kDEBUG */
- ops &= ~(1 << IPI_CPU_TEST);
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;
spin_lock_irqsave(&(p->lock),flags);
p->pending_ipi |= 1 << op;
- __raw_writel(IRQ_OFFSET(IPI_IRQ), cpu_data[cpu].hpa);
+ gsc_writel(IPI_IRQ - CPU_IRQ_BASE, cpu_data[cpu].hpa);
spin_unlock_irqrestore(&(p->lock),flags);
}
{
int i;
- for (i = 0; i < NR_CPUS; i++) {
- if (cpu_online(i) && i != smp_processor_id())
+ for_each_online_cpu(i) {
+ if (i != smp_processor_id())
send_IPI_single(i, op);
}
}
void
smp_send_reschedule(int cpu) { send_IPI_single(cpu, IPI_RESCHEDULE); }
+void
+smp_send_all_nop(void)
+{
+ send_IPI_allbutself(IPI_NOP);
+}
+
/**
* Run a function on all other CPUs.
{
struct smp_call_struct data;
unsigned long timeout;
- static spinlock_t lock = SPIN_LOCK_UNLOCKED;
+ static DEFINE_SPINLOCK(lock);
+ int retries = 0;
if (num_online_cpus() < 2)
return 0;
/* Can deadlock when called with interrupts disabled */
WARN_ON(irqs_disabled());
+
+ /* can also deadlock if IPIs are disabled */
+ WARN_ON((get_eiem() & (1UL<<(CPU_IRQ_MAX - IPI_IRQ))) == 0);
+
data.func = func;
data.info = info;
/* Send a message to all other CPUs and wait for them to respond */
send_IPI_allbutself(IPI_CALL_FUNC);
+ retry:
/* Wait for response */
timeout = jiffies + HZ;
while ( (atomic_read (&data.unstarted_count) > 0) &&
time_before (jiffies, timeout) )
barrier ();
+ if (atomic_read (&data.unstarted_count) > 0) {
+ printk(KERN_CRIT "SMP CALL FUNCTION TIMED OUT! (cpu=%d), try %d\n",
+ smp_processor_id(), ++retries);
+ goto retry;
+ }
/* 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 ();
* 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, 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);
enter_lazy_tlb(&init_mm, current);
init_IRQ(); /* make sure no IRQ's 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);
+ preempt_disable();
#if 0 /* NOT WORKING YET - see entry.S */
istack = (void *)__get_free_pages(GFP_KERNEL,ISTACK_ORDER);
#endif
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 */
panic("smp_callin() AAAAaaaaahhhh....\n");
}
-/*
- * 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.
*/
* 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, cpuid);
- unhash_process(idle);
- idle->thread_info->cpu = cpuid;
+ task_thread_info(idle)->cpu = cpuid;
/* Let _start know what logical CPU we're booting
** (offset into init_tasks[],cpu_data[])
** 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[cpuid].hpa);
+ gsc_writel(TIMER_IRQ - CPU_IRQ_BASE, cpu_data[cpuid].hpa);
mb();
/*
cpu_set(bootstrap_processor, cpu_online_map);
cpu_set(bootstrap_processor, cpu_present_map);
-
- cache_decay_ticks = HZ/100; /* FIXME very rough. */
}
}
-int __devinit __cpu_up(unsigned int cpu)
+int __cpuinit __cpu_up(unsigned int cpu)
{
if (cpu != 0 && cpu < parisc_max_cpus)
smp_boot_one_cpu(cpu);
if ( argc == 1 ){
#ifdef DUMP_MORE_STATE
- for(i=0; i<NR_CPUS; i++) {
+ for_each_online_cpu(i) {
int cpus_per_line = 4;
- if(cpu_online(i)) {
- if (j++ % cpus_per_line)
- printk(" %3d",i);
- else
- printk("\n %3d",i);
- }
+
+ if (j++ % cpus_per_line)
+ printk(" %3d",i);
+ else
+ printk("\n %3d",i);
}
printk("\n");
#else
} 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 (!cpu_online(i))
- continue;
+ for_each_online_cpu(i) {
if (cpu_data[i].cpuid != NO_PROC_ID) {
switch(cpu_data[i].state) {
case STATE_RENDEZVOUS:
} else if ((argc==2) && !(strcmp(argv[1],"-s"))) {
#ifdef DUMP_MORE_STATE
printk("\nCPUSTATE CPUID\n");
- for (i=0;i<NR_CPUS;i++) {
- if (!cpu_online(i))
- continue;
+ for_each_online_cpu(i) {
if (cpu_data[i].cpuid != NO_PROC_ID) {
switch(cpu_data[i].state) {
case STATE_RENDEZVOUS:
git://git.onelab.eu / linux-2.6.git / blobdiff