Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / sparc / include / asm / irqflags_64.h

diff --git a/kernel/arch/sparc/include/asm/irqflags_64.h b/kernel/arch/sparc/include/asm/irqflags_64.h
new file mode 100644 (file)
index 0000000..23cd27f
--- /dev/null
+++ b/kernel/arch/sparc/include/asm/irqflags_64.h
@@ -0,0 +1,97 @@
+/*
+ * 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) */