ARC: Add support for nSIM OSCI System C model

This adds support for an ARC Virtual Platform. This platform is based on the
System C standard promoted by the OSCI (Open System C Initiative) and uses
nSIM to simulate the ARC CPU core itself.

Users can build a virtual SoC by combining System C models of peripherals
and CPU cores.

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

3 files changed, 164 insertions, 0 deletions

diff --git a/arch/arc/boot/dts/nsimosci.dts b/arch/arc/boot/dts/nsimosci.dts
new file mode 100644
index 000000000000..ea16d782af58
--- /dev/null
+++ b/arch/arc/boot/dts/nsimosci.dts
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+/include/ "skeleton.dtsi"
+
+/ {
+        compatible = "snps,nsimosci";
+        clock-frequency = <80000000>;   /* 80 MHZ */
+        #address-cells = <1>;
+        #size-cells = <1>;
+        interrupt-parent = <&intc>;
+
+        chosen {
+                bootargs = "console=tty0 consoleblank=0";
+        };
+
+        aliases {
+                serial0 = &uart0;
+        };
+
+        memory {
+                device_type = "memory";
+                reg = <0x80000000 0x10000000>;  /* 256M */
+        };
+
+        fpga {
+                compatible = "simple-bus";
+                #address-cells = <1>;
+                #size-cells = <1>;
+
+                /* child and parent address space 1:1 mapped */
+                ranges;
+
+                intc: interrupt-controller {
+                        compatible = "snps,arc700-intc";
+                        interrupt-controller;
+                        #interrupt-cells = <1>;
+                };
+
+                uart0: serial@c0000000 {
+                        compatible = "snps,dw-apb-uart";
+                        reg = <0xc0000000 0x2000>;
+                        interrupts = <11>;
+                        #clock-frequency = <80000000>;
+                        clock-frequency = <3686400>;
+                        baud = <115200>;
+                        reg-shift = <2>;
+                        reg-io-width = <4>;
+                        status = "okay";
+                };
+
+                pgu0: pgu@c9000000 {
+                        compatible = "snps,arcpgufb";
+                        reg = <0xc9000000 0x400>;
+                };
+
+                ps2: ps2@c9001000 {
+                        compatible = "snps,arc_ps2";
+                        reg = <0xc9000400 0x14>;
+                        interrupts = <13>;
+                        interrupt-names = "arc_ps2_irq";
+                };
+
+                eth0: ethernet@c0003000 {
+                        compatible = "snps,oscilan";
+                        reg = <0xc0003000 0x44>;
+                        interrupts = <7>, <8>;
+                        interrupt-names = "rx", "tx";
+                };
+        };
+};
diff --git a/arch/arc/configs/nsimosci_defconfig b/arch/arc/configs/nsimosci_defconfig
new file mode 100644
index 000000000000..446c96c24eff
--- /dev/null
+++ b/arch/arc/configs/nsimosci_defconfig
@@ -0,0 +1,75 @@
+CONFIG_CROSS_COMPILE="arc-elf32-"
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_DEFAULT_HOSTNAME="ARCLinux"
+# CONFIG_SWAP is not set
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="../arc_initramfs"
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_SLUB_DEBUG is not set
+# CONFIG_COMPAT_BRK is not set
+CONFIG_KPROBES=y
+CONFIG_MODULES=y
+# CONFIG_LBDAF is not set
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+CONFIG_ARC_PLAT_FPGA_LEGACY=y
+CONFIG_ARC_BOARD_ML509=y
+# CONFIG_ARC_IDE is not set
+# CONFIG_ARCTANGENT_EMAC is not set
+# CONFIG_ARC_HAS_RTSC is not set
+CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci"
+# CONFIG_COMPACTION is not set
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_UNIX_DIAG=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+# CONFIG_IPV6 is not set
+# CONFIG_STANDALONE is not set
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+# CONFIG_BLK_DEV is not set
+CONFIG_NETDEVICES=y
+# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
+# CONFIG_MOUSE_PS2_ALPS is not set
+# CONFIG_MOUSE_PS2_LOGIPS2PP is not set
+# CONFIG_MOUSE_PS2_SYNAPTICS is not set
+# CONFIG_MOUSE_PS2_TRACKPOINT is not set
+CONFIG_MOUSE_PS2_TOUCHKIT=y
+# CONFIG_SERIO_I8042 is not set
+# CONFIG_SERIO_SERPORT is not set
+CONFIG_SERIO_ARC_PS2=y
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_ARC=y
+CONFIG_SERIAL_ARC_CONSOLE=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_LOGO=y
+# CONFIG_HID is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT2_FS=y
+CONFIG_EXT2_FS_XATTR=y
+CONFIG_TMPFS=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_NFS_FS=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_XZ_DEC=y
diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c
index 4e20a1a5104d..b3700c064c06 100644
--- a/arch/arc/plat-arcfpga/platform.c
+++ b/arch/arc/plat-arcfpga/platform.c
@@ -224,3 +224,15 @@ MACHINE_START(ML509, "ml509")
         .init_smp       = iss_model_init_smp,
 #endif
 MACHINE_END
+
+static const char *nsimosci_compat[] __initdata = {
+        "snps,nsimosci",
+        NULL,
+};
+
+MACHINE_START(NSIMOSCI, "nsimosci")
+        .dt_compat      = nsimosci_compat,
+        .init_early     = NULL,
+        .init_machine   = plat_fpga_populate_dev,
+        .init_irq       = NULL,
+MACHINE_END