From: Max Filippov <jcmvbkbc@gmail.com>
Date: Mon, 25 Nov 2019 20:59:13 +0000 (-0800)
Subject: xtensa: add xtensa_xsr macro
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=dedfe2590bdf1beaaf064f1f1b71098b5fddbfe1;p=linux.git

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 4489a27d527a8..76bc63127c66e 100644
--- 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)