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-rw-r--r--arch/hexagon/kernel/process.c65
1 files changed, 44 insertions, 21 deletions
diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c
index 06ae9ff..0a0dd5c 100644
--- a/arch/hexagon/kernel/process.c
+++ b/arch/hexagon/kernel/process.c
@@ -24,6 +24,7 @@
#include <linux/tick.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
+#include <linux/tracehook.h>
/*
* Program thread launch. Often defined as a macro in processor.h,
@@ -51,28 +52,11 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
* If hardware or VM offer wait termination even though interrupts
* are disabled.
*/
-static void default_idle(void)
+void arch_cpu_idle(void)
{
__vmwait();
-}
-
-void (*idle_sleep)(void) = default_idle;
-
-void cpu_idle(void)
-{
- while (1) {
- tick_nohz_idle_enter();
- local_irq_disable();
- while (!need_resched()) {
- idle_sleep();
- /* interrupts wake us up, but aren't serviced */
- local_irq_enable(); /* service interrupt */
- local_irq_disable();
- }
- local_irq_enable();
- tick_nohz_idle_exit();
- schedule();
- }
+ /* interrupts wake us up, but irqs are still disabled */
+ local_irq_enable();
}
/*
@@ -112,7 +96,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
if (unlikely(p->flags & PF_KTHREAD)) {
memset(childregs, 0, sizeof(struct pt_regs));
/* r24 <- fn, r25 <- arg */
- ss->r2524 = usp | ((u64)arg << 32);
+ ss->r24 = usp;
+ ss->r25 = arg;
pt_set_kmode(childregs);
return 0;
}
@@ -202,3 +187,41 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
{
return 0;
}
+
+
+/*
+ * Called on the exit path of event entry; see vm_entry.S
+ *
+ * Interrupts will already be disabled.
+ *
+ * Returns 0 if there's no need to re-check for more work.
+ */
+
+int do_work_pending(struct pt_regs *regs, u32 thread_info_flags)
+{
+ if (!(thread_info_flags & _TIF_WORK_MASK)) {
+ return 0;
+ } /* shortcut -- no work to be done */
+
+ local_irq_enable();
+
+ if (thread_info_flags & _TIF_NEED_RESCHED) {
+ schedule();
+ return 1;
+ }
+
+ if (thread_info_flags & _TIF_SIGPENDING) {
+ do_signal(regs);
+ return 1;
+ }
+
+ if (thread_info_flags & _TIF_NOTIFY_RESUME) {
+ clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
+ return 1;
+ }
+
+ /* Should not even reach here */
+ panic("%s: bad thread_info flags 0x%08x\n", __func__,
+ thread_info_flags);
+}
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