1 files changed, 90 insertions, 0 deletions

diff --git a/arch/score/include/asm/system.h b/arch/score/include/asm/system.h
new file mode 100644
index 000000000000..589d5c7e171c
--- /dev/null
+++ b/arch/score/include/asm/system.h
@@ -0,0 +1,90 @@
+#ifndef _ASM_SCORE_SYSTEM_H
+#define _ASM_SCORE_SYSTEM_H
+
+#include <linux/types.h>
+#include <linux/irqflags.h>
+
+struct pt_regs;
+struct task_struct;
+
+extern void *resume(void *last, void *next, void *next_ti);
+
+#define switch_to(prev, next, last)                             \
+do {                                                            \
+        (last) = resume(prev, next, task_thread_info(next));    \
+} while (0)
+
+#define finish_arch_switch(prev)        do {} while (0)
+
+typedef void (*vi_handler_t)(void);
+extern unsigned long arch_align_stack(unsigned long sp);
+
+#define mb()            barrier()
+#define rmb()           barrier()
+#define wmb()           barrier()
+#define smp_mb()        barrier()
+#define smp_rmb()       barrier()
+#define smp_wmb()       barrier()
+
+#define read_barrier_depends()          do {} while (0)
+#define smp_read_barrier_depends()      do {} while (0)
+
+#define set_mb(var, value)              do {var = value; wmb(); } while (0)
+
+#define __HAVE_ARCH_CMPXCHG     1
+
+#include <asm-generic/cmpxchg-local.h>
+
+#ifndef __ASSEMBLY__
+
+struct __xchg_dummy { unsigned long a[100]; };
+#define __xg(x) ((struct __xchg_dummy *)(x))
+
+static inline
+unsigned long __xchg(volatile unsigned long *m, unsigned long val)
+{
+        unsigned long retval;
+        unsigned long flags;
+
+        local_irq_save(flags);
+        retval = *m;
+        *m = val;
+        local_irq_restore(flags);
+        return retval;
+}
+
+#define xchg(ptr, v)                                            \
+        ((__typeof__(*(ptr))) __xchg((unsigned long *)(ptr),    \
+                                        (unsigned long)(v)))
+
+static inline unsigned long __cmpxchg(volatile unsigned long *m,
+                                unsigned long old, unsigned long new)
+{
+        unsigned long retval;
+        unsigned long flags;
+
+        local_irq_save(flags);
+        retval = *m;
+        if (retval == old)
+                *m = new;
+        local_irq_restore(flags);
+        return retval;
+}
+
+#define cmpxchg(ptr, o, n)                                      \
+        ((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr), \
+                                        (unsigned long)(o),     \
+                                        (unsigned long)(n)))
+
+extern void __die(const char *, struct pt_regs *, const char *,
+        const char *, unsigned long) __attribute__((noreturn));
+extern void __die_if_kernel(const char *, struct pt_regs *, const char *,
+        const char *, unsigned long);
+
+#define die(msg, regs)                                                  \
+        __die(msg, regs, __FILE__ ":", __func__, __LINE__)
+#define die_if_kernel(msg, regs)                                        \
+        __die_if_kernel(msg, regs, __FILE__ ":", __func__, __LINE__)
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _ASM_SCORE_SYSTEM_H */