sh: stacktrace/lockdep/irqflags tracing support.

Wire up all of the essentials for lockdep..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 123 insertions, 0 deletions

diff --git a/include/asm-sh/irqflags.h b/include/asm-sh/irqflags.h
new file mode 100644
index 000000000000..9dedc1b693e3
--- /dev/null
+++ b/include/asm-sh/irqflags.h
@@ -0,0 +1,123 @@
+#ifndef __ASM_SH_IRQFLAGS_H
+#define __ASM_SH_IRQFLAGS_H
+
+static inline void raw_local_irq_enable(void)
+{
+        unsigned long __dummy0, __dummy1;
+
+        __asm__ __volatile__ (
+                "stc    sr, %0\n\t"
+                "and    %1, %0\n\t"
+#ifdef CONFIG_CPU_HAS_SR_RB
+                "stc    r6_bank, %1\n\t"
+                "or     %1, %0\n\t"
+#endif
+                "ldc    %0, sr\n\t"
+                : "=&r" (__dummy0), "=r" (__dummy1)
+                : "1" (~0x000000f0)
+                : "memory"
+        );
+}
+
+static inline void raw_local_irq_disable(void)
+{
+        unsigned long flags;
+
+        __asm__ __volatile__ (
+                "stc    sr, %0\n\t"
+                "or     #0xf0, %0\n\t"
+                "ldc    %0, sr\n\t"
+                : "=&z" (flags)
+                : /* no inputs */
+                : "memory"
+        );
+}
+
+static inline void set_bl_bit(void)
+{
+        unsigned long __dummy0, __dummy1;
+
+        __asm__ __volatile__ (
+                "stc    sr, %0\n\t"
+                "or     %2, %0\n\t"
+                "and    %3, %0\n\t"
+                "ldc    %0, sr\n\t"
+                : "=&r" (__dummy0), "=r" (__dummy1)
+                : "r" (0x10000000), "r" (0xffffff0f)
+                : "memory"
+        );
+}
+
+static inline void clear_bl_bit(void)
+{
+        unsigned long __dummy0, __dummy1;
+
+        __asm__ __volatile__ (
+                "stc    sr, %0\n\t"
+                "and    %2, %0\n\t"
+                "ldc    %0, sr\n\t"
+                : "=&r" (__dummy0), "=r" (__dummy1)
+                : "1" (~0x10000000)
+                : "memory"
+        );
+}
+
+static inline unsigned long __raw_local_save_flags(void)
+{
+        unsigned long flags;
+
+        __asm__ __volatile__ (
+                "stc    sr, %0\n\t"
+                "and    #0xf0, %0\n\t"
+                : "=&z" (flags)
+                : /* no inputs */
+                : "memory"
+        );
+
+        return flags;
+}
+
+#define raw_local_save_flags(flags) \
+                do { (flags) = __raw_local_save_flags(); } while (0)
+
+static inline int raw_irqs_disabled_flags(unsigned long flags)
+{
+        return (flags != 0);
+}
+
+static inline int raw_irqs_disabled(void)
+{
+        unsigned long flags = __raw_local_save_flags();
+
+        return raw_irqs_disabled_flags(flags);
+}
+
+static inline unsigned long __raw_local_irq_save(void)
+{
+        unsigned long flags, __dummy;
+
+        __asm__ __volatile__ (
+                "stc    sr, %1\n\t"
+                "mov    %1, %0\n\t"
+                "or     #0xf0, %0\n\t"
+                "ldc    %0, sr\n\t"
+                "mov    %1, %0\n\t"
+                "and    #0xf0, %0\n\t"
+                : "=&z" (flags), "=&r" (__dummy)
+                : /* no inputs */
+                : "memory"
+        );
+
+        return flags;
+}
+
+#define raw_local_irq_save(flags) \
+                do { (flags) = __raw_local_irq_save(); } while (0)
+
+static inline void raw_local_irq_restore(unsigned long flags)
+{
+        if ((flags & 0xf0) != 0xf0)
+                raw_local_irq_enable();
+}
+
+#endif /* __ASM_SH_IRQFLAGS_H */