1 files changed, 35 insertions, 0 deletions

diff --git a/arch/mips/loongson/common/mem.c b/arch/mips/loongson/common/mem.c
new file mode 100644
index 000000000000..7c92f79b6480
--- /dev/null
+++ b/arch/mips/loongson/common/mem.c
@@ -0,0 +1,35 @@
+/*
+ * 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/fs.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+#include <mem.h>
+
+void __init prom_init_memory(void)
+{
+    add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
+#ifdef CONFIG_64BIT
+    if (highmemsize > 0)
+        add_memory_region(LOONGSON_HIGHMEM_START,
+                highmemsize << 20, BOOT_MEM_RAM);
+#endif /* CONFIG_64BIT */
+}
+
+/* override of arch/mips/mm/cache.c: __uncached_access */
+int __uncached_access(struct file *file, unsigned long addr)
+{
+        if (file->f_flags & O_SYNC)
+                return 1;
+
+        return addr >= __pa(high_memory) ||
+                ((addr >= LOONGSON_MMIO_MEM_START) &&
+                 (addr < LOONGSON_MMIO_MEM_END));
+}