[src/trunk]: src/sys/external/bsd/drm2/include/asm Define x86 static_cpu_has(...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/82f8de4b2143
branches:  trunk
changeset: 1027935:82f8de4b2143
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Sun Dec 19 01:18:39 2021 +0000

description:
Define x86 static_cpu_has(X86_FEATURE_CLFLUSH), clflush.

diffstat:

 sys/external/bsd/drm2/include/asm/cpufeature.h |  21 ++++++++++++++++++++-
 1 files changed, 20 insertions(+), 1 deletions(-)

diffs (41 lines):

diff -r 669f6d512427 -r 82f8de4b2143 sys/external/bsd/drm2/include/asm/cpufeature.h
--- a/sys/external/bsd/drm2/include/asm/cpufeature.h    Sun Dec 19 01:18:31 2021 +0000
+++ b/sys/external/bsd/drm2/include/asm/cpufeature.h    Sun Dec 19 01:18:39 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cpufeature.h,v 1.5 2020/09/05 07:45:44 maxv Exp $      */
+/*     $NetBSD: cpufeature.h,v 1.6 2021/12/19 01:18:39 riastradh Exp $ */
 
 /*-
  * Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -39,12 +39,31 @@
 #define        cpu_has_clflush ((cpu_info_primary.ci_feat_val[0] & CPUID_CLFSH) != 0)
 #define        cpu_has_pat     ((cpu_info_primary.ci_feat_val[0] & CPUID_PAT) != 0)
 
+#define        X86_FEATURE_CLFLUSH     0
+
+static inline bool
+static_cpu_has(int feature)
+{
+       switch (feature) {
+       case X86_FEATURE_CLFLUSH:
+               return cpu_has_clflush;
+       default:
+               return false;
+       }
+}
+
 static inline size_t
 cache_line_size(void)
 {
        return cpu_info_primary.ci_cflush_lsize;
 }
 
+static inline void
+clflush(const void *p)
+{
+       asm volatile ("clflush %0" : : "m" (*(const char *)p));
+}
+
 #endif /* x86 */
 
 #endif /* _LINUX_ASM_CPUFEATURE_H_ */