[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/frv/mm/highmem.c b/src/kernel/linux/v4.14/arch/frv/mm/highmem.c
new file mode 100644
index 0000000..45750fb
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/frv/mm/highmem.c
@@ -0,0 +1,86 @@
+/* highmem.c: arch-specific highmem stuff
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/highmem.h>
+#include <linux/module.h>
+
+void *kmap(struct page *page)
+{
+ might_sleep();
+ if (!PageHighMem(page))
+ return page_address(page);
+ return kmap_high(page);
+}
+
+EXPORT_SYMBOL(kmap);
+
+void kunmap(struct page *page)
+{
+ if (in_interrupt())
+ BUG();
+ if (!PageHighMem(page))
+ return;
+ kunmap_high(page);
+}
+
+EXPORT_SYMBOL(kunmap);
+
+void *kmap_atomic(struct page *page)
+{
+ unsigned long paddr;
+ int type;
+
+ preempt_disable();
+ pagefault_disable();
+ type = kmap_atomic_idx_push();
+ paddr = page_to_phys(page);
+
+ switch (type) {
+ /*
+ * The first 4 primary maps are reserved for architecture code
+ */
+ case 0: return __kmap_atomic_primary(0, paddr, 6);
+ case 1: return __kmap_atomic_primary(0, paddr, 7);
+ case 2: return __kmap_atomic_primary(0, paddr, 8);
+ case 3: return __kmap_atomic_primary(0, paddr, 9);
+ case 4: return __kmap_atomic_primary(0, paddr, 10);
+
+ case 5 ... 5 + NR_TLB_LINES - 1:
+ return __kmap_atomic_secondary(type - 5, paddr);
+
+ default:
+ BUG();
+ return NULL;
+ }
+}
+EXPORT_SYMBOL(kmap_atomic);
+
+void __kunmap_atomic(void *kvaddr)
+{
+ int type = kmap_atomic_idx();
+ switch (type) {
+ case 0: __kunmap_atomic_primary(0, 6); break;
+ case 1: __kunmap_atomic_primary(0, 7); break;
+ case 2: __kunmap_atomic_primary(0, 8); break;
+ case 3: __kunmap_atomic_primary(0, 9); break;
+ case 4: __kunmap_atomic_primary(0, 10); break;
+
+ case 5 ... 5 + NR_TLB_LINES - 1:
+ __kunmap_atomic_secondary(type - 5, kvaddr);
+ break;
+
+ default:
+ BUG();
+ }
+ kmap_atomic_idx_pop();
+ pagefault_enable();
+ preempt_enable();
+}
+EXPORT_SYMBOL(__kunmap_atomic);