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Diffstat (limited to 'arch/x86/mach-voyager/voyager_smp.c')
-rw-r--r--arch/x86/mach-voyager/voyager_smp.c112
1 files changed, 19 insertions, 93 deletions
diff --git a/arch/x86/mach-voyager/voyager_smp.c b/arch/x86/mach-voyager/voyager_smp.c
index 8acbf0cdf1a..ee0fba09215 100644
--- a/arch/x86/mach-voyager/voyager_smp.c
+++ b/arch/x86/mach-voyager/voyager_smp.c
@@ -59,11 +59,6 @@ __u32 voyager_quad_processors = 0;
* activity count. Finally exported by i386_ksyms.c */
static int voyager_extended_cpus = 1;
-/* Have we found an SMP box - used by time.c to do the profiling
- interrupt for timeslicing; do not set to 1 until the per CPU timer
- interrupt is active */
-int smp_found_config = 0;
-
/* Used for the invalidate map that's also checked in the spinlock */
static volatile unsigned long smp_invalidate_needed;
@@ -955,94 +950,24 @@ static void smp_stop_cpu_function(void *dummy)
halt();
}
-static DEFINE_SPINLOCK(call_lock);
-
-struct call_data_struct {
- void (*func) (void *info);
- void *info;
- volatile unsigned long started;
- volatile unsigned long finished;
- int wait;
-};
-
-static struct call_data_struct *call_data;
-
/* execute a thread on a new CPU. The function to be called must be
* previously set up. This is used to schedule a function for
* execution on all CPUs - set up the function then broadcast a
* function_interrupt CPI to come here on each CPU */
static void smp_call_function_interrupt(void)
{
- void (*func) (void *info) = call_data->func;
- void *info = call_data->info;
- /* must take copy of wait because call_data may be replaced
- * unless the function is waiting for us to finish */
- int wait = call_data->wait;
- __u8 cpu = smp_processor_id();
-
- /*
- * Notify initiating CPU that I've grabbed the data and am
- * about to execute the function
- */
- mb();
- if (!test_and_clear_bit(cpu, &call_data->started)) {
- /* If the bit wasn't set, this could be a replay */
- printk(KERN_WARNING "VOYAGER SMP: CPU %d received call funtion"
- " with no call pending\n", cpu);
- return;
- }
- /*
- * At this point the info structure may be out of scope unless wait==1
- */
irq_enter();
- (*func) (info);
+ generic_smp_call_function_interrupt();
__get_cpu_var(irq_stat).irq_call_count++;
irq_exit();
- if (wait) {
- mb();
- clear_bit(cpu, &call_data->finished);
- }
}
-static int
-voyager_smp_call_function_mask(cpumask_t cpumask,
- void (*func) (void *info), void *info, int wait)
+static void smp_call_function_single_interrupt(void)
{
- struct call_data_struct data;
- u32 mask = cpus_addr(cpumask)[0];
-
- mask &= ~(1 << smp_processor_id());
-
- if (!mask)
- return 0;
-
- /* Can deadlock when called with interrupts disabled */
- WARN_ON(irqs_disabled());
-
- data.func = func;
- data.info = info;
- data.started = mask;
- data.wait = wait;
- if (wait)
- data.finished = mask;
-
- spin_lock(&call_lock);
- call_data = &data;
- wmb();
- /* Send a message to all other CPUs and wait for them to respond */
- send_CPI(mask, VIC_CALL_FUNCTION_CPI);
-
- /* Wait for response */
- while (data.started)
- barrier();
-
- if (wait)
- while (data.finished)
- barrier();
-
- spin_unlock(&call_lock);
-
- return 0;
+ irq_enter();
+ generic_smp_call_function_single_interrupt();
+ __get_cpu_var(irq_stat).irq_call_count++;
+ irq_exit();
}
/* Sorry about the name. In an APIC based system, the APICs
@@ -1099,6 +1024,12 @@ void smp_qic_call_function_interrupt(struct pt_regs *regs)
smp_call_function_interrupt();
}
+void smp_qic_call_function_single_interrupt(struct pt_regs *regs)
+{
+ ack_QIC_CPI(QIC_CALL_FUNCTION_SINGLE_CPI);
+ smp_call_function_single_interrupt();
+}
+
void smp_vic_cpi_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
@@ -1119,6 +1050,8 @@ void smp_vic_cpi_interrupt(struct pt_regs *regs)
smp_enable_irq_interrupt();
if (test_and_clear_bit(VIC_CALL_FUNCTION_CPI, &vic_cpi_mailbox[cpu]))
smp_call_function_interrupt();
+ if (test_and_clear_bit(VIC_CALL_FUNCTION_SINGLE_CPI, &vic_cpi_mailbox[cpu]))
+ smp_call_function_single_interrupt();
set_irq_regs(old_regs);
}
@@ -1134,16 +1067,7 @@ static void do_flush_tlb_all(void *info)
/* flush the TLB of every active CPU in the system */
void flush_tlb_all(void)
{
- on_each_cpu(do_flush_tlb_all, 0, 1, 1);
-}
-
-/* used to set up the trampoline for other CPUs when the memory manager
- * is sorted out */
-void __init smp_alloc_memory(void)
-{
- trampoline_base = alloc_bootmem_low_pages(PAGE_SIZE);
- if (__pa(trampoline_base) >= 0x93000)
- BUG();
+ on_each_cpu(do_flush_tlb_all, 0, 1);
}
/* send a reschedule CPI to one CPU by physical CPU number*/
@@ -1175,7 +1099,7 @@ int safe_smp_processor_id(void)
/* broadcast a halt to all other CPUs */
static void voyager_smp_send_stop(void)
{
- smp_call_function(smp_stop_cpu_function, NULL, 1, 1);
+ smp_call_function(smp_stop_cpu_function, NULL, 1);
}
/* this function is triggered in time.c when a clock tick fires
@@ -1862,5 +1786,7 @@ struct smp_ops smp_ops = {
.smp_send_stop = voyager_smp_send_stop,
.smp_send_reschedule = voyager_smp_send_reschedule,
- .smp_call_function_mask = voyager_smp_call_function_mask,
+
+ .send_call_func_ipi = native_send_call_func_ipi,
+ .send_call_func_single_ipi = native_send_call_func_single_ipi,
};