feat: 9.5.9

c/arm32le.c

@@ -0,0 +1,53 @@
+/* arm32le.c
+ * Copyright 1984-2017 Cisco Systems, Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "system.h"
+
+#include <sys/types.h>
+#include <sys/mman.h>
+
+/* we don't count on having the right value for correctness,
+ * but the right value will give maximum efficiency */
+#define DEFAULT_L1_MAX_CACHE_LINE_SIZE 32
+
+static int l1_max_cache_line_size;
+
+/* flushcache_max_gap is the maximum gap between unmerged chunks of memory to be flushed */
+INT S_flushcache_max_gap(void) {
+  return l1_max_cache_line_size;
+}
+
+void S_doflush(uptr start, uptr end) {
+#ifdef DEBUG
+  printf("  doflush(%x, %x)\n", start, end); fflush(stdout);
+#endif
+
+  __clear_cache((char *)start, (char *)end);
+}
+
+void S_machine_init(void) {
+  int l1_dcache_line_size, l1_icache_line_size;
+
+#ifdef _SC_LEVEL1_DCACHE_LINESIZE
+  if ((l1_dcache_line_size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)) <= 0)
+#endif
+    l1_dcache_line_size = DEFAULT_L1_MAX_CACHE_LINE_SIZE;
+#ifdef _SC_LEVEL1_ICACHE_LINESIZE
+  if ((l1_icache_line_size = sysconf(_SC_LEVEL1_ICACHE_LINESIZE)) <= 0)
+#endif
+    l1_icache_line_size = DEFAULT_L1_MAX_CACHE_LINE_SIZE;
+  l1_max_cache_line_size = l1_dcache_line_size > l1_icache_line_size ? l1_dcache_line_size : l1_icache_line_size;
+}