summaryrefslogtreecommitdiff
path: root/arch/xtensa/include/asm/irqflags.h
diff options
context:
space:
mode:
authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/xtensa/include/asm/irqflags.h
Initial import
Diffstat (limited to 'arch/xtensa/include/asm/irqflags.h')
-rw-r--r--arch/xtensa/include/asm/irqflags.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/irqflags.h b/arch/xtensa/include/asm/irqflags.h
new file mode 100644
index 000000000..ea36674c6
--- /dev/null
+++ b/arch/xtensa/include/asm/irqflags.h
@@ -0,0 +1,61 @@
+/*
+ * Xtensa IRQ flags handling functions
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_IRQFLAGS_H
+#define _XTENSA_IRQFLAGS_H
+
+#include <linux/types.h>
+
+static inline unsigned long arch_local_save_flags(void)
+{
+ unsigned long flags;
+ asm volatile("rsr %0, ps" : "=a" (flags));
+ return flags;
+}
+
+static inline unsigned long arch_local_irq_save(void)
+{
+ unsigned long flags;
+ asm volatile("rsil %0, "__stringify(LOCKLEVEL)
+ : "=a" (flags) :: "memory");
+ return flags;
+}
+
+static inline void arch_local_irq_disable(void)
+{
+ arch_local_irq_save();
+}
+
+static inline void arch_local_irq_enable(void)
+{
+ unsigned long flags;
+ asm volatile("rsil %0, 0" : "=a" (flags) :: "memory");
+}
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ asm volatile("wsr %0, ps; rsync"
+ :: "a" (flags) : "memory");
+}
+
+static inline bool arch_irqs_disabled_flags(unsigned long flags)
+{
+#if XCHAL_EXCM_LEVEL < LOCKLEVEL || (1 << PS_EXCM_BIT) < LOCKLEVEL
+#error "XCHAL_EXCM_LEVEL and 1<<PS_EXCM_BIT must be no less than LOCKLEVEL"
+#endif
+ return (flags & (PS_INTLEVEL_MASK | (1 << PS_EXCM_BIT))) >= LOCKLEVEL;
+}
+
+static inline bool arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#endif /* _XTENSA_IRQFLAGS_H */