diff mbox series

[5/5,ARC] Clear the instruction cache using syscalls.

Message ID 1523005214-1611-6-git-send-email-claziss@synopsys.com
State New
Headers show
Series General fixes | expand

Commit Message

Claudiu Zissulescu April 6, 2018, 9 a.m. UTC 
Clear the instruction cache from `beg' to `end'.  This makes an inline
system call to SYS_cacheflush.

gcc/
2017-03-28  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/linux.h (CLEAR_INSN_CACHE): Define.
---
 gcc/config/arc/linux.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Comments

Andrew Burgess April 27, 2018, 9:40 p.m. UTC | #1 
* Claudiu Zissulescu <Claudiu.Zissulescu@synopsys.com> [2018-04-06 11:00:14 +0200]:

> Clear the instruction cache from `beg' to `end'.  This makes an inline
> system call to SYS_cacheflush.
> 
> gcc/
> 2017-03-28  Claudiu Zissulescu  <claziss@synopsys.com>
> 
> 	* config/arc/linux.h (CLEAR_INSN_CACHE): Define.


Looks good.

Thanks,
Andrew

> ---
>  gcc/config/arc/linux.h | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/gcc/config/arc/linux.h b/gcc/config/arc/linux.h
> index 4e87dfe..96d548e 100644
> --- a/gcc/config/arc/linux.h
> +++ b/gcc/config/arc/linux.h
> @@ -109,3 +109,17 @@ along with GCC; see the file COPYING3.  If not see
>  /* Build attribute: procedure call standard.  */
>  #undef ATTRIBUTE_PCS
>  #define ATTRIBUTE_PCS 3
> +
> +/* Clear the instruction cache from `beg' to `end'.  This makes an
> +   inline system call to SYS_cacheflush.  */
> +#undef CLEAR_INSN_CACHE
> +#define CLEAR_INSN_CACHE(beg, end)					\
> +{									\
> +  register unsigned long _beg __asm ("r0") = (unsigned long) (beg);	\
> +  register unsigned long _end __asm ("r1") = (unsigned long) (end);	\
> +  register unsigned long _xtr __asm ("r2") = 0;				\
> +  register unsigned long _scno __asm ("r8") = 244;			\
> +  __asm __volatile ("trap_s 0		; sys_cache_sync"		\
> +		    : "=r" (_beg)					\
> +		    : "0" (_beg), "r" (_end), "r" (_xtr), "r" (_scno));	\
> +}
> -- 
> 1.9.1
>
Claudiu Zissulescu April 30, 2018, 1:18 p.m. UTC | #2 
committed. Thank you for your review,
Claudiu
diff mbox series

Patch

diff --git a/gcc/config/arc/linux.h b/gcc/config/arc/linux.h
index 4e87dfe..96d548e 100644
--- a/gcc/config/arc/linux.h
+++ b/gcc/config/arc/linux.h
@@ -109,3 +109,17 @@  along with GCC; see the file COPYING3.  If not see
 /* Build attribute: procedure call standard.  */
 #undef ATTRIBUTE_PCS
 #define ATTRIBUTE_PCS 3
+
+/* Clear the instruction cache from `beg' to `end'.  This makes an
+   inline system call to SYS_cacheflush.  */
+#undef CLEAR_INSN_CACHE
+#define CLEAR_INSN_CACHE(beg, end)					\
+{									\
+  register unsigned long _beg __asm ("r0") = (unsigned long) (beg);	\
+  register unsigned long _end __asm ("r1") = (unsigned long) (end);	\
+  register unsigned long _xtr __asm ("r2") = 0;				\
+  register unsigned long _scno __asm ("r8") = 244;			\
+  __asm __volatile ("trap_s 0		; sys_cache_sync"		\
+		    : "=r" (_beg)					\
+		    : "0" (_beg), "r" (_end), "r" (_xtr), "r" (_scno));	\
+}