board: starfive: add StarFive VisionFive v2 board support
Add board support for StarFive VisionFive v2.
Signed-off-by: Yanhong Wang <yanhong.wang@starfivetech.com>
Tested-by: Conor Dooley <conor.dooley@microchip.com>
diff --git a/board/starfive/visionfive2/starfive_visionfive2.c b/board/starfive/visionfive2/starfive_visionfive2.c
new file mode 100644
index 0000000..613fe79
--- /dev/null
+++ b/board/starfive/visionfive2/starfive_visionfive2.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ * Author: Yanhong Wang<yanhong.wang@starfivetech.com>
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <cpu_func.h>
+#include <linux/bitops.h>
+
+#define JH7110_L2_PREFETCHER_BASE_ADDR 0x2030000
+#define JH7110_L2_PREFETCHER_HART_OFFSET 0x2000
+
+/* enable U74-mc hart1~hart4 prefetcher */
+static void enable_prefetcher(void)
+{
+ u8 hart;
+ u32 *reg;
+
+ /* JH7110 use U74MC CORE IP, it include five cores(one S7 and four U7),
+ * but only U7 cores support prefetcher configuration
+ */
+ for (hart = 1; hart < 5; hart++) {
+ reg = (void *)(u64)(JH7110_L2_PREFETCHER_BASE_ADDR
+ + hart * JH7110_L2_PREFETCHER_HART_OFFSET);
+
+ mb(); /* memory barrier */
+ setbits_le32(reg, 0x1);
+ mb(); /* memory barrier */
+ }
+}
+
+int board_init(void)
+{
+ enable_caches();
+ enable_prefetcher();
+
+ return 0;
+}