arc: Add support for HS Development Kit board

ARC HS Development Kit board is a new low-cost
development platform sporting ARC HS38 in real silicon
with nice set of features such as:
 * Quad-core ARC HS38 with 512 kB L2 cache and running @1GHz
 * 4Gb of DDR (we use only lowest 1Gb out of it now)
 * Lots of DesigWare peripherals
 * Different connectivity modules:
     - Synopsys HAPS HT3
     - Arduino-compatible connector
     - MikroBUS

This initial commit supports the following peripherals:
 * UART (DW 8250)
 * Ethernet (DW GMAC)
 * SD/MMC (DW Mobile Storage)
 * USB 1.1 & 2.0

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

4 files changed, 98 insertions, 0 deletions

diff --git a/board/synopsys/hsdk/Kconfig b/board/synopsys/hsdk/Kconfig
new file mode 100644
index 0000000000..e8c00a6e7d
--- /dev/null
+++ b/board/synopsys/hsdk/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_HSDK
+
+config SYS_BOARD
+	default "hsdk"
+
+config SYS_VENDOR
+	default "synopsys"
+
+config SYS_CONFIG_NAME
+	default "hsdk"
+
+endif
diff --git a/board/synopsys/hsdk/MAINTAINERS b/board/synopsys/hsdk/MAINTAINERS
new file mode 100644
index 0000000000..d034bc479d
--- /dev/null
+++ b/board/synopsys/hsdk/MAINTAINERS
@@ -0,0 +1,5 @@
+AXS10X BOARD
+M:	Alexey Brodkin <abrodkin@synopsys.com>
+S:	Maintained
+F:	board/synopsys/hsdk/
+F:	configs/hsdk_defconfig
diff --git a/board/synopsys/hsdk/Makefile b/board/synopsys/hsdk/Makefile
new file mode 100644
index 0000000000..d84dd03265
--- /dev/null
+++ b/board/synopsys/hsdk/Makefile
@@ -0,0 +1,7 @@
+#
+# Copyright (C) 2017 Synopsys, Inc. All rights reserved.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= hsdk.o
diff --git a/board/synopsys/hsdk/hsdk.c b/board/synopsys/hsdk/hsdk.c
new file mode 100644
index 0000000000..7b562556e6
--- /dev/null
+++ b/board/synopsys/hsdk/hsdk.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2017 Synopsys, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dwmmc.h>
+#include <malloc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define	CREG_BASE	(ARC_PERIPHERAL_BASE + 0x1000)
+#define	CREG_PAE	(CREG_BASE + 0x180)
+#define	CREG_PAE_UPDATE	(CREG_BASE + 0x194)
+#define	CREG_CPU_START	(CREG_BASE + 0x400)
+
+int board_early_init_f(void)
+{
+	/* In current chip PAE support for DMA is broken, disabling it. */
+	writel(0, (void __iomem *) CREG_PAE);
+
+	/* Really apply settings made above */
+	writel(1, (void __iomem *) CREG_PAE_UPDATE);
+
+	return 0;
+}
+
+int board_mmc_init(bd_t *bis)
+{
+	struct dwmci_host *host = NULL;
+
+	host = malloc(sizeof(struct dwmci_host));
+	if (!host) {
+		printf("dwmci_host malloc fail!\n");
+		return 1;
+	}
+
+	memset(host, 0, sizeof(struct dwmci_host));
+	host->name = "Synopsys Mobile storage";
+	host->ioaddr = (void *)ARC_DWMMC_BASE;
+	host->buswidth = 4;
+	host->dev_index = 0;
+	host->bus_hz = 100000000;
+
+	add_dwmci(host, host->bus_hz / 2, 400000);
+
+	return 0;
+}
+
+#define RESET_VECTOR_ADDR	0x0
+
+void smp_set_core_boot_addr(unsigned long addr, int corenr)
+{
+	/* All cores have reset vector pointing to 0 */
+	writel(addr, (void __iomem *)RESET_VECTOR_ADDR);
+
+	/* Make sure other cores see written value in memory */
+	flush_dcache_all();
+}
+
+void smp_kick_all_cpus(void)
+{
+#define BITS_START_CORE1	1
+#define BITS_START_CORE2	2
+#define BITS_START_CORE3	3
+
+	int cmd = readl((void __iomem *)CREG_CPU_START);
+
+	cmd |= (1 << BITS_START_CORE1) |
+	       (1 << BITS_START_CORE2) |
+	       (1 << BITS_START_CORE3);
+	writel(cmd, (void __iomem *)CREG_CPU_START);
+}