ARM: uniphier: add PH1-LD20 SoC support

This is the first ARMv8 SoC from Socionext Inc.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/arch/arm/mach-uniphier/arm64/arm-cci500.c b/arch/arm/mach-uniphier/arm64/arm-cci500.c
new file mode 100644
index 0000000000..607f96a58d
--- /dev/null
+++ b/arch/arm/mach-uniphier/arm64/arm-cci500.c
@@ -0,0 +1,41 @@
+/*
+ * Initialization of ARM Corelink CCI-500 Cache Coherency Interconnect
+ *
+ * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mapmem.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+
+#define CCI500_BASE			0x5FD00000
+#define CCI500_SLAVE_OFFSET		0x1000
+
+#define CCI500_SNOOP_CTRL
+#define   CCI500_SNOOP_CTRL_EN_DVM	BIT(1)
+#define   CCI500_SNOOP_CTRL_EN_SNOOP	BIT(0)
+
+void cci500_init(unsigned int nr_slaves)
+{
+	unsigned long slave_base = CCI500_BASE + CCI500_SLAVE_OFFSET;
+	int i;
+
+	for (i = 0; i < nr_slaves; i++) {
+		void __iomem *base;
+		u32 tmp;
+
+		base = map_sysmem(slave_base, SZ_4K);
+
+		tmp = readl(base);
+		tmp |= CCI500_SNOOP_CTRL_EN_DVM | CCI500_SNOOP_CTRL_EN_SNOOP;
+		writel(tmp, base);
+
+		unmap_sysmem(base);
+
+		slave_base += CCI500_SLAVE_OFFSET;
+	}
+}