Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 56 insertions, 0 deletions

diff --git a/arch/mips/ar7/memory.c b/arch/mips/ar7/memory.c
new file mode 100644
index 000000000..787716c5e
--- /dev/null
+++ b/arch/mips/ar7/memory.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
+ */
+#include <linux/memblock.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/pfn.h>
+#include <linux/proc_fs.h>
+#include <linux/string.h>
+#include <linux/swap.h>
+
+#include <asm/bootinfo.h>
+#include <asm/page.h>
+#include <asm/sections.h>
+
+#include <asm/mach-ar7/ar7.h>
+
+static int __init memsize(void)
+{
+        u32 size = (64 << 20);
+        u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4);
+        u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
+        u32 *tmpaddr = addr;
+
+        while (tmpaddr > kernel_end) {
+                *tmpaddr = (u32)tmpaddr;
+                size >>= 1;
+                tmpaddr -= size >> 2;
+        }
+
+        do {
+                tmpaddr += size >> 2;
+                if (*tmpaddr != (u32)tmpaddr)
+                        break;
+                size <<= 1;
+        } while (size < (64 << 20));
+
+        writel((u32)tmpaddr, &addr);
+
+        return size;
+}
+
+void __init prom_meminit(void)
+{
+        unsigned long pages;
+
+        pages = memsize() >> PAGE_SHIFT;
+        memblock_add(PHYS_OFFSET, pages << PAGE_SHIFT);
+}
+
+void __init prom_free_prom_memory(void)
+{
+        /* Nothing to free */
+}