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blackfin: smp: cleanup smp code

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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>
This commit is contained in:
Bob Liu
2011-12-12 11:04:05 +08:00
parent 16df3666f4
commit d0014be47d
6 changed files with 77 additions and 16 deletions
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53
arch/blackfin/mach-common/smp.c
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@@ -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 @@ unsigned long blackfin_iflush_l1_entry[NR_CPUS];
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 @@ static irqreturn_t ipi_handler_int0(int irq, void *dev_instance)
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 @@ static irqreturn_t ipi_handler_int1(int irq, void *dev_instance)
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 @@ void smp_send_reschedule(int cpu)
{
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 @@ void smp_send_reschedule(int cpu)
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 @@ void smp_send_stop(void)
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 @@ void __cpuinit secondary_start_kernel(void)
bfin_setup_caches(cpu);
notify_cpu_starting(cpu);
/*
* Calibrate loops per jiffy value.
* IRQs need to be enabled here - D-cache can be invalidated