Module Name: src
Committed By: riastradh
Date: Mon Aug 27 15:11:46 UTC 2018
Modified Files:
src/sys/external/bsd/drm2/drm: drm_cache.c
Log Message:
Implement drm_md_clflush_* for powerpc with dcbf.
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/sys/external/bsd/drm2/drm/drm_cache.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/external/bsd/drm2/drm/drm_cache.c
diff -u src/sys/external/bsd/drm2/drm/drm_cache.c:1.8 src/sys/external/bsd/drm2/drm/drm_cache.c:1.9
--- src/sys/external/bsd/drm2/drm/drm_cache.c:1.8 Sat Oct 17 21:11:56 2015
+++ src/sys/external/bsd/drm2/drm/drm_cache.c Mon Aug 27 15:11:46 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: drm_cache.c,v 1.8 2015/10/17 21:11:56 jmcneill Exp $ */
+/* $NetBSD: drm_cache.c,v 1.9 2018/08/27 15:11:46 riastradh Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: drm_cache.c,v 1.8 2015/10/17 21:11:56 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: drm_cache.c,v 1.9 2018/08/27 15:11:46 riastradh Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -167,4 +167,48 @@ drm_md_clflush_virt_range(const void *va
x86_mfence();
}
-#endif /* defined(__i386__) || defined(__x86_64__) */
+#elif defined(__powerpc__)
+
+static void
+drm_ppc_dcbf(vaddr_t va, vsize_t off)
+{
+ asm volatile ("dcbf\t%0,%1" : : "b"(va), "r"(off));
+}
+
+static bool
+drm_md_clflush_finegrained_p(void)
+{
+ return true;
+}
+
+static void
+drm_md_clflush_all(void)
+{
+ panic("don't know how to flush entire cache on powerpc");
+}
+
+static void
+drm_md_clflush_page(struct page *page)
+{
+ void *const vaddr = kmap_atomic(page);
+
+ drm_md_clflush_virt_range(vaddr, PAGE_SIZE);
+
+ kunmap_atomic(vaddr);
+}
+
+static void
+drm_md_clflush_virt_range(const void *ptr, size_t nbytes)
+{
+ const unsigned dcsize = curcpu()->ci_ci.dcache_line_size;
+ vaddr_t va = (vaddr_t)ptr;
+ vaddr_t start = rounddown(va, dcsize);
+ vaddr_t end = roundup(va + nbytes, dcsize);
+ vsize_t len = end - start;
+ vsize_t off;
+
+ for (off = 0; off < len; off += dcsize)
+ drm_ppc_dcbf(start, off);
+}
+
+#endif
