arm64: Add Xilinx ZynqMP support

Add basic Xilinx ZynqMP arm64 support.
Serial and SD is supported.
It supports emulation platfrom ep108 and QEMU.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

4 files changed, 87 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv8/Makefile b/arch/arm/cpu/armv8/Makefile
index 0c102230ae..dee5e258b6 100644
--- a/arch/arm/cpu/armv8/Makefile
+++ b/arch/arm/cpu/armv8/Makefile
@@ -16,3 +16,4 @@ obj-y	+= tlb.o
 obj-y	+= transition.o
 
 obj-$(CONFIG_FSL_LSCH3) += fsl-lsch3/
+obj-$(CONFIG_TARGET_XILINX_ZYNQMP) += zynqmp/
diff --git a/arch/arm/cpu/armv8/zynqmp/Makefile b/arch/arm/cpu/armv8/zynqmp/Makefile
new file mode 100644
index 0000000000..a997e045bd
--- /dev/null
+++ b/arch/arm/cpu/armv8/zynqmp/Makefile
@@ -0,0 +1,9 @@
+#
+# (C) Copyright 2014 - 2015 Xilinx, Inc.
+# Michal Simek <michal.simek@xilinx.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= clk.o
+obj-y	+= cpu.o
diff --git a/arch/arm/cpu/armv8/zynqmp/clk.c b/arch/arm/cpu/armv8/zynqmp/clk.c
new file mode 100644
index 0000000000..0af619d92f
--- /dev/null
+++ b/arch/arm/cpu/armv8/zynqmp/clk.c
@@ -0,0 +1,49 @@
+/*
+ * (C) Copyright 2014 - 2015 Xilinx, Inc.
+ * Michal Simek <michal.simek@xilinx.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+unsigned long get_uart_clk(int dev_id)
+{
+	u32 ver = zynqmp_get_silicon_version();
+
+	switch (ver) {
+	case ZYNQMP_CSU_VERSION_EP108:
+		return 25000000;
+	}
+
+	return 133000000;
+}
+
+#ifdef CONFIG_CLOCKS
+/**
+ * set_cpu_clk_info() - Initialize clock framework
+ * Always returns zero.
+ *
+ * This function is called from common code after relocation and sets up the
+ * clock framework. The framework must not be used before this function had been
+ * called.
+ */
+int set_cpu_clk_info(void)
+{
+	gd->cpu_clk = get_tbclk();
+
+	/* Support Veloce to show at least 1MHz via bdi */
+	if (gd->cpu_clk > 1000000)
+		gd->bd->bi_arm_freq = gd->cpu_clk / 1000000;
+	else
+		gd->bd->bi_arm_freq = 1;
+
+	gd->bd->bi_dsp_freq = 0;
+
+	return 0;
+}
+#endif
diff --git a/arch/arm/cpu/armv8/zynqmp/cpu.c b/arch/arm/cpu/armv8/zynqmp/cpu.c
new file mode 100644
index 0000000000..6fae03c1af
--- /dev/null
+++ b/arch/arm/cpu/armv8/zynqmp/cpu.c
@@ -0,0 +1,28 @@
+/*
+ * (C) Copyright 2014 - 2015 Xilinx, Inc.
+ * Michal Simek <michal.simek@xilinx.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
+
+#define ZYNQ_SILICON_VER_MASK	0xF000
+#define ZYNQ_SILICON_VER_SHIFT	12
+
+DECLARE_GLOBAL_DATA_PTR;
+
+unsigned int zynqmp_get_silicon_version(void)
+{
+	gd->cpu_clk = get_tbclk();
+
+	switch (gd->cpu_clk) {
+	case 50000000:
+		return ZYNQMP_CSU_VERSION_QEMU;
+	}
+
+	return ZYNQMP_CSU_VERSION_EP108;
+}