Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 60 insertions, 0 deletions

diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
new file mode 100644
index 0000000000..045d93f151
--- /dev/null
+++ b/arch/sh/kernel/idle.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * The idle loop for all SuperH platforms.
+ *
+ *  Copyright (C) 2002 - 2009  Paul Mundt
+ */
+#include <linux/cpu.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/pm.h>
+#include <linux/tick.h>
+#include <linux/preempt.h>
+#include <linux/thread_info.h>
+#include <linux/irqflags.h>
+#include <linux/smp.h>
+#include <linux/atomic.h>
+#include <asm/processor.h>
+#include <asm/smp.h>
+#include <asm/bl_bit.h>
+
+static void (*sh_idle)(void);
+
+void default_idle(void)
+{
+	set_bl_bit();
+	raw_local_irq_enable();
+	/* Isn't this racy ? */
+	cpu_sleep();
+	raw_local_irq_disable();
+	clear_bl_bit();
+}
+
+void __noreturn arch_cpu_idle_dead(void)
+{
+	play_dead();
+}
+
+void arch_cpu_idle(void)
+{
+	sh_idle();
+}
+
+void __init select_idle_routine(void)
+{
+	/*
+	 * If a platform has set its own idle routine, leave it alone.
+	 */
+	if (!sh_idle)
+		sh_idle = default_idle;
+}
+
+void stop_this_cpu(void *unused)
+{
+	local_irq_disable();
+	set_cpu_online(smp_processor_id(), false);
+
+	for (;;)
+		cpu_sleep();
+}