[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/sh/mm/flush-sh4.c b/src/kernel/linux/v4.14/arch/sh/mm/flush-sh4.c
new file mode 100644
index 0000000..8b8ef89
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/sh/mm/flush-sh4.c
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/mm.h>
+#include <asm/mmu_context.h>
+#include <asm/cache_insns.h>
+#include <asm/cacheflush.h>
+#include <asm/traps.h>
+
+/*
+ * Write back the dirty D-caches, but not invalidate them.
+ *
+ * START: Virtual Address (U0, P1, or P3)
+ * SIZE: Size of the region.
+ */
+static void sh4__flush_wback_region(void *start, int size)
+{
+ reg_size_t aligned_start, v, cnt, end;
+
+ aligned_start = register_align(start);
+ v = aligned_start & ~(L1_CACHE_BYTES-1);
+ end = (aligned_start + size + L1_CACHE_BYTES-1)
+ & ~(L1_CACHE_BYTES-1);
+ cnt = (end - v) / L1_CACHE_BYTES;
+
+ while (cnt >= 8) {
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ cnt -= 8;
+ }
+
+ while (cnt) {
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ cnt--;
+ }
+}
+
+/*
+ * Write back the dirty D-caches and invalidate them.
+ *
+ * START: Virtual Address (U0, P1, or P3)
+ * SIZE: Size of the region.
+ */
+static void sh4__flush_purge_region(void *start, int size)
+{
+ reg_size_t aligned_start, v, cnt, end;
+
+ aligned_start = register_align(start);
+ v = aligned_start & ~(L1_CACHE_BYTES-1);
+ end = (aligned_start + size + L1_CACHE_BYTES-1)
+ & ~(L1_CACHE_BYTES-1);
+ cnt = (end - v) / L1_CACHE_BYTES;
+
+ while (cnt >= 8) {
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ cnt -= 8;
+ }
+ while (cnt) {
+ __ocbp(v); v += L1_CACHE_BYTES;
+ cnt--;
+ }
+}
+
+/*
+ * No write back please
+ */
+static void sh4__flush_invalidate_region(void *start, int size)
+{
+ reg_size_t aligned_start, v, cnt, end;
+
+ aligned_start = register_align(start);
+ v = aligned_start & ~(L1_CACHE_BYTES-1);
+ end = (aligned_start + size + L1_CACHE_BYTES-1)
+ & ~(L1_CACHE_BYTES-1);
+ cnt = (end - v) / L1_CACHE_BYTES;
+
+ while (cnt >= 8) {
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ cnt -= 8;
+ }
+
+ while (cnt) {
+ __ocbi(v); v += L1_CACHE_BYTES;
+ cnt--;
+ }
+}
+
+void __init sh4__flush_region_init(void)
+{
+ __flush_wback_region = sh4__flush_wback_region;
+ __flush_invalidate_region = sh4__flush_invalidate_region;
+ __flush_purge_region = sh4__flush_purge_region;
+}