From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:27:49 +0200
Subject: Adding upstream version 6.6.15.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/mips/loongson2ef/common/mem.c | 43 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 arch/mips/loongson2ef/common/mem.c

(limited to 'arch/mips/loongson2ef/common/mem.c')

diff --git a/arch/mips/loongson2ef/common/mem.c b/arch/mips/loongson2ef/common/mem.c
new file mode 100644
index 0000000000..fceb3ee47e
--- /dev/null
+++ b/arch/mips/loongson2ef/common/mem.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ */
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/memblock.h>
+#include <linux/mm.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+#include <mem.h>
+#include <pci.h>
+
+
+u32 memsize, highmemsize;
+
+void __init prom_init_memory(void)
+{
+	memblock_add(0x0, (memsize << 20));
+
+#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
+	{
+		int bit;
+
+		bit = fls(memsize + highmemsize);
+		if (bit != ffs(memsize + highmemsize))
+			bit += 20;
+		else
+			bit = bit + 20 - 1;
+
+		/* set cpu window3 to map CPU to DDR: 2G -> 2G */
+		LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul,
+					  0x80000000ul, (1 << bit));
+		mmiowb();
+	}
+#endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */
+
+#ifdef CONFIG_64BIT
+	if (highmemsize > 0)
+		memblock_add(LOONGSON_HIGHMEM_START, highmemsize << 20);
+#endif /* !CONFIG_64BIT */
+}
-- 
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