1 files changed, 98 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/irqflags_64.h b/arch/sparc/include/asm/irqflags_64.h
new file mode 100644
index 000000000..c29ed571a
--- /dev/null
+++ b/arch/sparc/include/asm/irqflags_64.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * include/asm/irqflags.h
+ *
+ * IRQ flags handling
+ *
+ * This file gets included from lowlevel asm headers too, to provide
+ * wrapped versions of the local_irq_*() APIs, based on the
+ * arch_local_irq_*() functions from the lowlevel headers.
+ */
+#ifndef _ASM_IRQFLAGS_H
+#define _ASM_IRQFLAGS_H
+
+#include <asm/pil.h>
+
+#ifndef __ASSEMBLY__
+
+static inline notrace unsigned long arch_local_save_flags(void)
+{
+	unsigned long flags;
+
+	__asm__ __volatile__(
+		"rdpr	%%pil, %0"
+		: "=r" (flags)
+	);
+
+	return flags;
+}
+
+static inline notrace void arch_local_irq_restore(unsigned long flags)
+{
+	__asm__ __volatile__(
+		"wrpr	%0, %%pil"
+		: /* no output */
+		: "r" (flags)
+		: "memory"
+	);
+}
+
+static inline notrace void arch_local_irq_disable(void)
+{
+	__asm__ __volatile__(
+		"wrpr	%0, %%pil"
+		: /* no outputs */
+		: "i" (PIL_NORMAL_MAX)
+		: "memory"
+	);
+}
+
+static inline notrace void arch_local_irq_enable(void)
+{
+	__asm__ __volatile__(
+		"wrpr	0, %%pil"
+		: /* no outputs */
+		: /* no inputs */
+		: "memory"
+	);
+}
+
+static inline notrace int arch_irqs_disabled_flags(unsigned long flags)
+{
+	return (flags > 0);
+}
+
+static inline notrace int arch_irqs_disabled(void)
+{
+	return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+static inline notrace unsigned long arch_local_irq_save(void)
+{
+	unsigned long flags, tmp;
+
+	/* Disable interrupts to PIL_NORMAL_MAX unless we already
+	 * are using PIL_NMI, in which case PIL_NMI is retained.
+	 *
+	 * The only values we ever program into the %pil are 0,
+	 * PIL_NORMAL_MAX and PIL_NMI.
+	 *
+	 * Since PIL_NMI is the largest %pil value and all bits are
+	 * set in it (0xf), it doesn't matter what PIL_NORMAL_MAX
+	 * actually is.
+	 */
+	__asm__ __volatile__(
+		"rdpr	%%pil, %0\n\t"
+		"or	%0, %2, %1\n\t"
+		"wrpr	%1, 0x0, %%pil"
+		: "=r" (flags), "=r" (tmp)
+		: "i" (PIL_NORMAL_MAX)
+		: "memory"
+	);
+
+	return flags;
+}
+
+#endif /* (__ASSEMBLY__) */
+
+#endif /* !(_ASM_IRQFLAGS_H) */