blackfin: smp: cleanup smp code
move idle task point to percpu blackfin_cpudata and add smp_timer_broadcast
interface.
enable SUPPLE_1_WAKEUP and add BFIN_IPI_TIMER ipi support.
Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index 0784a52..d346405 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -14,6 +14,7 @@
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/cache.h>
+#include <linux/clockchips.h>
#include <linux/profile.h>
#include <linux/errno.h>
#include <linux/mm.h>
@@ -47,9 +48,10 @@
struct blackfin_initial_pda __cpuinitdata initial_pda_coreb;
-#define BFIN_IPI_RESCHEDULE 0
-#define BFIN_IPI_CALL_FUNC 1
-#define BFIN_IPI_CPU_STOP 2
+#define BFIN_IPI_TIMER 0
+#define BFIN_IPI_RESCHEDULE 1
+#define BFIN_IPI_CALL_FUNC 2
+#define BFIN_IPI_CPU_STOP 3
struct blackfin_flush_data {
unsigned long start;
@@ -160,6 +162,14 @@
return IRQ_HANDLED;
}
+DECLARE_PER_CPU(struct clock_event_device, coretmr_events);
+void ipi_timer(void)
+{
+ int cpu = smp_processor_id();
+ struct clock_event_device *evt = &per_cpu(coretmr_events, cpu);
+ evt->event_handler(evt);
+}
+
static irqreturn_t ipi_handler_int1(int irq, void *dev_instance)
{
struct ipi_message *msg;
@@ -176,6 +186,9 @@
while (msg_queue->count) {
msg = &msg_queue->ipi_message[msg_queue->head];
switch (msg->type) {
+ case BFIN_IPI_TIMER:
+ ipi_timer();
+ break;
case BFIN_IPI_RESCHEDULE:
scheduler_ipi();
break;
@@ -297,8 +310,6 @@
{
cpumask_t callmap;
/* simply trigger an ipi */
- if (cpu_is_offline(cpu))
- return;
cpumask_clear(&callmap);
cpumask_set_cpu(cpu, &callmap);
@@ -308,6 +319,16 @@
return;
}
+void smp_send_msg(const struct cpumask *mask, unsigned long type)
+{
+ smp_send_message(*mask, type, NULL, NULL, 0);
+}
+
+void smp_timer_broadcast(const struct cpumask *mask)
+{
+ smp_send_msg(mask, BFIN_IPI_TIMER);
+}
+
void smp_send_stop(void)
{
cpumask_t callmap;
@@ -326,17 +347,24 @@
int __cpuinit __cpu_up(unsigned int cpu)
{
int ret;
- static struct task_struct *idle;
+ struct blackfin_cpudata *ci = &per_cpu(cpu_data, cpu);
+ struct task_struct *idle = ci->idle;
- if (idle)
+ if (idle) {
free_task(idle);
-
- idle = fork_idle(cpu);
- if (IS_ERR(idle)) {
- printk(KERN_ERR "CPU%u: fork() failed\n", cpu);
- return PTR_ERR(idle);
+ idle = NULL;
}
+ if (!idle) {
+ idle = fork_idle(cpu);
+ if (IS_ERR(idle)) {
+ printk(KERN_ERR "CPU%u: fork() failed\n", cpu);
+ return PTR_ERR(idle);
+ }
+ ci->idle = idle;
+ } else {
+ init_idle(idle, cpu);
+ }
secondary_stack = task_stack_page(idle) + THREAD_SIZE;
ret = platform_boot_secondary(cpu, idle);
@@ -411,6 +439,7 @@
bfin_setup_caches(cpu);
+ notify_cpu_starting(cpu);
/*
* Calibrate loops per jiffy value.
* IRQs need to be enabled here - D-cache can be invalidated