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authorDavid S. Miller <davem@davemloft.net>2008-07-17 23:44:50 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-17 23:44:50 -0700
commitd172ad18f9914f70c761a6cad470efc986d5e07e (patch)
treede393d1c2819fbf9f68539b3e29ff7424365f8f0 /arch/sparc64
parent4fe3ebec122f23a095cc1d17557c175caaa55ca1 (diff)
sparc64: Convert to generic helpers for IPI function calls.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
-rw-r--r--arch/sparc64/Kconfig1
-rw-r--r--arch/sparc64/kernel/smp.c87
-rw-r--r--arch/sparc64/kernel/sparc64_ksyms.c2
-rw-r--r--arch/sparc64/kernel/ttable.S7
-rw-r--r--arch/sparc64/mm/ultra.S5
5 files changed, 29 insertions, 73 deletions
diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 794d22fdf46..1aeb1da9829 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -16,6 +16,7 @@ config SPARC64
select HAVE_IDE
select HAVE_LMB
select HAVE_ARCH_KGDB
+ select USE_GENERIC_SMP_HELPERS if SMP
config GENERIC_TIME
bool
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index c099d96f123..7cf72b4bb10 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -788,89 +788,36 @@ static void smp_start_sync_tick_client(int cpu)
0, 0, 0, mask);
}
-/* Send cross call to all processors except self. */
-#define smp_cross_call(func, ctx, data1, data2) \
- smp_cross_call_masked(func, ctx, data1, data2, cpu_online_map)
-
-struct call_data_struct {
- void (*func) (void *info);
- void *info;
- atomic_t finished;
- int wait;
-};
-
-static struct call_data_struct *call_data;
-
extern unsigned long xcall_call_function;
-/**
- * smp_call_function(): 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.
- * @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.
- */
-static int sparc64_smp_call_function_mask(void (*func)(void *info), void *info,
- int wait, cpumask_t mask)
+void arch_send_call_function_ipi(cpumask_t mask)
{
- struct call_data_struct data;
- int cpus;
-
- /* Can deadlock when called with interrupts disabled */
- WARN_ON(irqs_disabled());
-
- data.func = func;
- data.info = info;
- atomic_set(&data.finished, 0);
- data.wait = wait;
-
- spin_lock(&call_lock);
-
- cpu_clear(smp_processor_id(), mask);
- cpus = cpus_weight(mask);
- if (!cpus)
- goto out_unlock;
-
- call_data = &data;
- mb();
-
smp_cross_call_masked(&xcall_call_function, 0, 0, 0, mask);
+}
- /* Wait for response */
- while (atomic_read(&data.finished) != cpus)
- cpu_relax();
+extern unsigned long xcall_call_function_single;
-out_unlock:
- spin_unlock(&call_lock);
+void arch_send_call_function_single_ipi(int cpu)
+{
+ cpumask_t mask = cpumask_of_cpu(cpu);
- return 0;
+ smp_cross_call_masked(&xcall_call_function_single, 0, 0, 0, mask);
}
-int smp_call_function(void (*func)(void *info), void *info, int wait)
-{
- return sparc64_smp_call_function_mask(func, info, wait, cpu_online_map);
-}
+/* Send cross call to all processors except self. */
+#define smp_cross_call(func, ctx, data1, data2) \
+ smp_cross_call_masked(func, ctx, data1, data2, cpu_online_map)
void smp_call_function_client(int irq, struct pt_regs *regs)
{
- void (*func) (void *info) = call_data->func;
- void *info = call_data->info;
+ clear_softint(1 << irq);
+ generic_smp_call_function_interrupt();
+}
+void smp_call_function_single_client(int irq, struct pt_regs *regs)
+{
clear_softint(1 << irq);
- if (call_data->wait) {
- /* let initiator proceed only after completion */
- func(info);
- atomic_inc(&call_data->finished);
- } else {
- /* let initiator proceed after getting data */
- atomic_inc(&call_data->finished);
- func(info);
- }
+ generic_smp_call_function_single_interrupt();
}
static void tsb_sync(void *info)
@@ -890,7 +837,7 @@ static void tsb_sync(void *info)
void smp_tsb_sync(struct mm_struct *mm)
{
- sparc64_smp_call_function_mask(tsb_sync, mm, 1, mm->cpu_vm_mask);
+ smp_call_function_mask(mm->cpu_vm_mask, tsb_sync, mm, 1);
}
extern unsigned long xcall_flush_tlb_mm;
diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c
index 49d3ea50c24..504e678ee12 100644
--- a/arch/sparc64/kernel/sparc64_ksyms.c
+++ b/arch/sparc64/kernel/sparc64_ksyms.c
@@ -108,8 +108,6 @@ EXPORT_SYMBOL(__read_unlock);
EXPORT_SYMBOL(__write_lock);
EXPORT_SYMBOL(__write_unlock);
EXPORT_SYMBOL(__write_trylock);
-
-EXPORT_SYMBOL(smp_call_function);
#endif /* CONFIG_SMP */
#ifdef CONFIG_MCOUNT
diff --git a/arch/sparc64/kernel/ttable.S b/arch/sparc64/kernel/ttable.S
index 450053af039..1ade3d6fb7f 100644
--- a/arch/sparc64/kernel/ttable.S
+++ b/arch/sparc64/kernel/ttable.S
@@ -58,7 +58,12 @@ tl0_irq3: BTRAP(0x43)
tl0_irq4: BTRAP(0x44)
#endif
tl0_irq5: TRAP_IRQ(handler_irq, 5)
-tl0_irq6: BTRAP(0x46) BTRAP(0x47) BTRAP(0x48) BTRAP(0x49)
+#ifdef CONFIG_SMP
+tl0_irq6: TRAP_IRQ(smp_call_function_single_client, 6)
+#else
+tl0_irq6: BTRAP(0x46)
+#endif
+tl0_irq7: BTRAP(0x47) BTRAP(0x48) BTRAP(0x49)
tl0_irq10: BTRAP(0x4a) BTRAP(0x4b) BTRAP(0x4c) BTRAP(0x4d)
tl0_irq14: TRAP_IRQ(timer_interrupt, 14)
tl0_irq15: TRAP_IRQ(handler_irq, 15)
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S
index 9bb2d90a9df..4c8ca131ffa 100644
--- a/arch/sparc64/mm/ultra.S
+++ b/arch/sparc64/mm/ultra.S
@@ -688,6 +688,11 @@ xcall_call_function:
wr %g0, (1 << PIL_SMP_CALL_FUNC), %set_softint
retry
+ .globl xcall_call_function_single
+xcall_call_function_single:
+ wr %g0, (1 << PIL_SMP_CALL_FUNC_SNGL), %set_softint
+ retry
+
.globl xcall_receive_signal
xcall_receive_signal:
wr %g0, (1 << PIL_SMP_RECEIVE_SIGNAL), %set_softint