arm: boards: add mach-qemu and virt64 board

Introduce mach-qemu and add qemu virt64 board which emulates arm64 board.

Signed-off-by: Raphael Poggi <poggi.raph@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

14 files changed, 249 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 986fdaa2f5..f904579404 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -255,6 +255,10 @@ config ARCH_ZYNQ
 	bool "Xilinx Zynq-based boards"
 	select HAS_DEBUG_LL
 
+config ARCH_QEMU
+	bool "ARM QEMU boards"
+	select HAS_DEBUG_LL
+
 endchoice
 
 source arch/arm/cpu/Kconfig
@@ -280,6 +284,7 @@ source arch/arm/mach-vexpress/Kconfig
 source arch/arm/mach-tegra/Kconfig
 source arch/arm/mach-uemd/Kconfig
 source arch/arm/mach-zynq/Kconfig
+source arch/arm/mach-qemu/Kconfig
 
 config ARM_ASM_UNIFIED
 	bool
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 2b056afd67..865de047bc 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -94,6 +94,7 @@ machine-$(CONFIG_ARCH_VEXPRESS)		:= vexpress
 machine-$(CONFIG_ARCH_TEGRA)		:= tegra
 machine-$(CONFIG_ARCH_UEMD)		:= uemd
 machine-$(CONFIG_ARCH_ZYNQ)		:= zynq
+machine-$(CONFIG_ARCH_QEMU)		:= qemu
 
 
 # Board directory name.  This list is sorted alphanumerically
diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index 9241b664c9..c271f5dbb9 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -135,3 +135,4 @@ obj-$(CONFIG_MACH_VIRT2REAL)			+= virt2real/
 obj-$(CONFIG_MACH_ZEDBOARD)			+= avnet-zedboard/
 obj-$(CONFIG_MACH_ZYLONITE)			+= zylonite/
 obj-$(CONFIG_MACH_VARISCITE_MX6)		+= variscite-mx6/
+obj-$(CONFIG_MACH_QEMU_VIRT64)			+= qemu-virt64/
diff --git a/arch/arm/boards/qemu-virt64/Kconfig b/arch/arm/boards/qemu-virt64/Kconfig
new file mode 100644
index 0000000000..b7bee3a245
--- /dev/null
+++ b/arch/arm/boards/qemu-virt64/Kconfig
@@ -0,0 +1,8 @@
+
+if MACH_QEMU
+
+config ARCH_TEXT_BASE
+	hex
+	default 0x40000000
+
+endif
diff --git a/arch/arm/boards/qemu-virt64/Makefile b/arch/arm/boards/qemu-virt64/Makefile
new file mode 100644
index 0000000000..2da0494d49
--- /dev/null
+++ b/arch/arm/boards/qemu-virt64/Makefile
@@ -0,0 +1,2 @@
+obj-y += init.o
+lwl-y += lowlevel.o
diff --git a/arch/arm/boards/qemu-virt64/env/config b/arch/arm/boards/qemu-virt64/env/config
new file mode 100644
index 0000000000..781dbfefa6
--- /dev/null
+++ b/arch/arm/boards/qemu-virt64/env/config
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+autoboot_timeout=3
+
+bootargs="console=ttyAMA0,115200"
+
+# set a fancy prompt (if support is compiled in)
+PS1="\e[1;31m[barebox@\h]:\w\e[0m\n# "
diff --git a/arch/arm/boards/qemu-virt64/init.c b/arch/arm/boards/qemu-virt64/init.c
new file mode 100644
index 0000000000..58dba0f68a
--- /dev/null
+++ b/arch/arm/boards/qemu-virt64/init.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2016 Raphaël Poggi <poggi.raph@gmail.com>
+ *
+ * GPLv2 only
+ */
+
+#include <common.h>
+#include <init.h>
+#include <asm/armlinux.h>
+#include <asm/system_info.h>
+#include <mach/devices.h>
+#include <environment.h>
+#include <linux/sizes.h>
+#include <io.h>
+#include <globalvar.h>
+#include <asm/mmu.h>
+
+static int virt_mem_init(void)
+{
+	virt_add_ddram(SZ_2G);
+
+	return 0;
+}
+mem_initcall(virt_mem_init);
+
+static int virt_env_init(void)
+{
+	add_cfi_flash_device(0, 0x00000000, SZ_128M, 0);
+
+	devfs_add_partition("nor0", 0x00000, 0x40000, DEVFS_PARTITION_FIXED, "self0");
+	devfs_add_partition("nor0", 0x40000, 0x20000, DEVFS_PARTITION_FIXED, "env0");
+
+	return 0;
+}
+device_initcall(virt_env_init);
+
+static int virt_console_init(void)
+{
+	virt_register_uart(0);
+
+	return 0;
+}
+console_initcall(virt_console_init);
+
+static int virt_core_init(void)
+{
+	char *hostname = "virt64";
+
+	if (cpu_is_cortex_a53())
+		hostname = "virt64-a53";
+	else if (cpu_is_cortex_a57())
+		hostname = "virt64-a57";
+
+	barebox_set_model("ARM QEMU virt64");
+	barebox_set_hostname(hostname);
+
+	return 0;
+}
+postcore_initcall(virt_core_init);
+
+#ifdef CONFIG_MMU
+static int virt_mmu_enable(void)
+{
+	/* Mapping all periph and flash range */
+	arch_remap_range((void *)0x00000000, 0x40000000, DEV_MEM);
+
+	mmu_enable();
+
+	return 0;
+}
+postmmu_initcall(virt_mmu_enable);
+#endif
diff --git a/arch/arm/boards/qemu-virt64/lowlevel.c b/arch/arm/boards/qemu-virt64/lowlevel.c
new file mode 100644
index 0000000000..a60c4b0426
--- /dev/null
+++ b/arch/arm/boards/qemu-virt64/lowlevel.c
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2013 Jean-Christophe PLAGNIOL-VILLARD <plagnio@jcrosoft.com>
+ *
+ * GPLv2 only
+ */
+
+#include <common.h>
+#include <linux/sizes.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <asm/system_info.h>
+
+void barebox_arm_reset_vector(void)
+{
+	arm_cpu_lowlevel_init();
+	arm_setup_stack(0x40000000 + SZ_2G - SZ_16K);
+
+	barebox_arm_entry(0x40000000, SZ_2G, NULL);
+}
diff --git a/arch/arm/configs/qemu_virt64_defconfig b/arch/arm/configs/qemu_virt64_defconfig
new file mode 100644
index 0000000000..ed5abef195
--- /dev/null
+++ b/arch/arm/configs/qemu_virt64_defconfig
@@ -0,0 +1,47 @@
+CONFIG_ARCH_QEMU=y
+CONFIG_BAREBOX_MAX_IMAGE_SIZE=0x05000000
+CONFIG_AEABI=y
+CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS=y
+CONFIG_MMU=y
+# CONFIG_MMU_EARLY is not set
+CONFIG_TEXT_BASE=0x41000000
+CONFIG_BAREBOX_MAX_BARE_INIT_SIZE=0x01000000
+CONFIG_PROMPT="qemu-virt64: "
+CONFIG_GLOB=y
+CONFIG_HUSH_FANCY_PROMPT=y
+CONFIG_CMDLINE_EDITING=y
+CONFIG_AUTO_COMPLETE=y
+CONFIG_MENU=y
+CONFIG_PARTITION=y
+CONFIG_DEFAULT_ENVIRONMENT_GENERIC=y
+CONFIG_DEFAULT_ENVIRONMENT_PATH="arch/arm/boards/qemu-virt64/env"
+CONFIG_DEBUG_INFO=y
+CONFIG_LONGHELP=y
+CONFIG_CMD_MEMINFO=y
+# CONFIG_CMD_BOOTU is not set
+CONFIG_CMD_GO=y
+CONFIG_CMD_LOADB=y
+CONFIG_CMD_RESET=y
+CONFIG_CMD_UIMAGE=y
+CONFIG_CMD_PARTITION=y
+CONFIG_CMD_EXPORT=y
+CONFIG_CMD_PRINTENV=y
+CONFIG_CMD_SAVEENV=y
+CONFIG_CMD_UNCOMPRESS=y
+CONFIG_CMD_SLEEP=y
+CONFIG_CMD_ECHO_E=y
+CONFIG_CMD_EDIT=y
+CONFIG_CMD_LOGIN=y
+CONFIG_CMD_MENU=y
+CONFIG_CMD_MENU_MANAGEMENT=y
+CONFIG_CMD_PASSWD=y
+CONFIG_CMD_READLINE=y
+CONFIG_CMD_TIMEOUT=y
+CONFIG_CMD_OFTREE=y
+CONFIG_SERIAL_AMBA_PL011=y
+# CONFIG_SPI is not set
+CONFIG_MTD=y
+CONFIG_DRIVER_CFI=y
+CONFIG_CFI_BUFFER_WRITE=y
+CONFIG_DIGEST_SHA1_GENERIC=y
+CONFIG_DIGEST_SHA256_GENERIC=y
diff --git a/arch/arm/mach-qemu/Kconfig b/arch/arm/mach-qemu/Kconfig
new file mode 100644
index 0000000000..d30bae4c6f
--- /dev/null
+++ b/arch/arm/mach-qemu/Kconfig
@@ -0,0 +1,18 @@
+if ARCH_QEMU
+
+config ARCH_TEXT_BASE
+	hex
+	default 0x40000000
+
+choice
+	prompt "ARM Board type"
+
+config MACH_QEMU_VIRT64
+	bool "QEMU arm64 virt machine"
+	select CPU_V8
+	select SYS_SUPPORTS_64BIT_KERNEL
+	select ARM_AMBA
+	select HAVE_CONFIGURABLE_MEMORY_LAYOUT
+
+endchoice
+endif
diff --git a/arch/arm/mach-qemu/Makefile b/arch/arm/mach-qemu/Makefile
new file mode 100644
index 0000000000..ece277ce0e
--- /dev/null
+++ b/arch/arm/mach-qemu/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_MACH_QEMU_VIRT64) += virt_devices.o
diff --git a/arch/arm/mach-qemu/include/mach/debug_ll.h b/arch/arm/mach-qemu/include/mach/debug_ll.h
new file mode 100644
index 0000000000..89b06923ad
--- /dev/null
+++ b/arch/arm/mach-qemu/include/mach/debug_ll.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2013 Jean-Christophe PLAGNIOL-VILLARD <plagniol@jcrosoft.com>
+ *
+ * GPLv2 only
+ */
+
+#ifndef __MACH_DEBUG_LL_H__
+#define   __MACH_DEBUG_LL_H__
+
+#include <linux/amba/serial.h>
+#include <io.h>
+
+#define DEBUG_LL_PHYS_BASE		0x10000000
+#define DEBUG_LL_PHYS_BASE_RS1		0x1c000000
+
+#ifdef MP
+#define DEBUG_LL_UART_ADDR DEBUG_LL_PHYS_BASE
+#else
+#define DEBUG_LL_UART_ADDR DEBUG_LL_PHYS_BASE_RS1
+#endif
+
+#include <asm/debug_ll_pl011.h>
+
+#endif
diff --git a/arch/arm/mach-qemu/include/mach/devices.h b/arch/arm/mach-qemu/include/mach/devices.h
new file mode 100644
index 0000000000..9872c61b49
--- /dev/null
+++ b/arch/arm/mach-qemu/include/mach/devices.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) 2016 Raphaël Poggi <poggi.raph@gmail.com>
+ *
+ * GPLv2 only
+ */
+
+#ifndef __ASM_ARCH_DEVICES_H__
+#define __ASM_ARCH_DEVICES_H__
+
+void virt_add_ddram(u32 size);
+void virt_register_uart(unsigned id);
+
+#endif /* __ASM_ARCH_DEVICES_H__ */
diff --git a/arch/arm/mach-qemu/virt_devices.c b/arch/arm/mach-qemu/virt_devices.c
new file mode 100644
index 0000000000..999f463125
--- /dev/null
+++ b/arch/arm/mach-qemu/virt_devices.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 Raphaël Poggi <poggi.raph@gmail.com>
+ *
+ * GPLv2 only
+ */
+
+#include <common.h>
+#include <linux/amba/bus.h>
+#include <asm/memory.h>
+#include <mach/devices.h>
+#include <linux/ioport.h>
+
+void virt_add_ddram(u32 size)
+{
+	arm_add_mem_device("ram0", 0x40000000, size);
+}
+
+void virt_register_uart(unsigned id)
+{
+	resource_size_t start;
+
+	switch (id) {
+	case 0:
+		start = 0x09000000;
+		break;
+	default:
+		return;
+	}
+	amba_apb_device_add(NULL, "uart-pl011", id, start, 4096, NULL, 0);
+}