xtensa: add xtensa_xsr macro

xtensa_xsr does the XSR instruction for the specified special register.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index 4489a27d527a801314e791fcd041c07b6f1fe1ac..76bc63127c66ef02403d4b7d5c67bd28a0d10456 100644 (file)
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -246,6 +246,13 @@ extern unsigned long __get_wchan(struct task_struct *p);
         v; \
         })
 
+#define xtensa_xsr(x, sr) \
+       ({ \
+        unsigned int __v__ = (unsigned int)(x); \
+        __asm__ __volatile__ ("xsr %0, " __stringify(sr) : "+a"(__v__)); \
+        __v__; \
+        })
+
 #if XCHAL_HAVE_EXTERN_REGS
 
 static inline void set_er(unsigned long value, unsigned long addr)