mvebu: new subtarget cortex A53

This commit introduces new subtarget for Marvell EBU Armada Cortex A53
processor based devices.

The first device is Globalscale ESPRESSObin. Some hardware specs:

SoC: Marvell Armada 3700LP (88F3720) dual core ARM Cortex A53
     processor up to 1.2GHz
RAM: 512MB, 1GB or 2GB DDR3
Storage: SATA interface
         µSD card slot with footprint for an optional 4GB EMMC
         4MB SPI NOR flash for bootloader
Ethernet: Topaz Networking Switch (88E6341) with 3x GbE ports
Connectors: USB 3.0
            USB 2.0
            µUSB port connected to PL2303SA (USB to serial bridge
            controller) for UART access
Expansion: 2x 46-pin GPIO headers for accessories and shields with
           I2C, GPIOs, PWM, UART, SPI, MMC, etc
           MiniPCIe slot
Misc: Reset button, JTAG interface

Currently booting only from µSD card is supported.
The boards depending on date of dispatch can come with various U-Boot
versions. For the newest version 2017.03-armada-17.10 no manual
intervention should be needed to boot OpenWrt image. For the older ones
it's necessary to modify default U-Boot environment:

 1. Interrupt boot process to run U-Boot command line,

 2. Run following commands:
    (for version 2017.03-armada-17.06 and 2017.03-armada-17.08)
     setenv bootcmd "load mmc 0:1 0x4d00000 boot.scr; source 0x4d00000"
     saveenv

    (for version 2015.01-armada-17.02 and 2015.01-armada-17.04)
     setenv bootargs "console=ttyMV0,115200 root=/dev/mmcblk0p2 rw rootwait"
     setenv bootcmd "ext4load mmc 0:1 ${fdt_addr} armada-3720-espressobin.dtb; ext4load mmc 0:1 ${kernel_addr} Image; booti ${kernel_addr} - ${fdt_addr}"
     saveenv

 3. Poweroff, insert SD card with OpenWrt image, boot and enjoy.

Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>

2 files changed, 127 insertions, 0 deletions

diff --git a/target/linux/mvebu/cortexa53/config-default b/target/linux/mvebu/cortexa53/config-default
new file mode 100644
index 0000000000..0ee5d3cca6
--- /dev/null
+++ b/target/linux/mvebu/cortexa53/config-default
@@ -0,0 +1,112 @@
+CONFIG_64BIT=y
+# CONFIG_ACPI is not set
+CONFIG_ARCH_DMA_ADDR_T_64BIT=y
+CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
+CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
+CONFIG_ARCH_HAS_HOLES_MEMORYMODEL=y
+CONFIG_ARCH_HAS_KCOV=y
+CONFIG_ARCH_MMAP_RND_BITS=18
+CONFIG_ARCH_MMAP_RND_BITS_MAX=24
+CONFIG_ARCH_MMAP_RND_BITS_MIN=18
+CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=11
+# CONFIG_ARCH_OPTIONAL_KERNEL_RWX is not set
+# CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT is not set
+CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
+CONFIG_ARCH_PROC_KCORE_TEXT=y
+CONFIG_ARCH_SELECT_MEMORY_MODEL=y
+CONFIG_ARCH_SPARSEMEM_DEFAULT=y
+CONFIG_ARCH_SPARSEMEM_ENABLE=y
+CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
+CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
+CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
+CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION=y
+CONFIG_ARCH_WANT_FRAME_POINTERS=y
+CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
+CONFIG_ARM64=y
+# CONFIG_ARM64_16K_PAGES is not set
+CONFIG_ARM64_4K_PAGES=y
+# CONFIG_ARM64_64K_PAGES is not set
+CONFIG_ARM64_CONT_SHIFT=4
+# CONFIG_ARM64_CRYPTO is not set
+# CONFIG_ARM64_HW_AFDBM is not set
+# CONFIG_ARM64_LSE_ATOMICS is not set
+CONFIG_ARM64_PAGE_SHIFT=12
+# CONFIG_ARM64_PAN is not set
+# CONFIG_ARM64_PMEM is not set
+# CONFIG_ARM64_PTDUMP_CORE is not set
+# CONFIG_ARM64_PTDUMP_DEBUGFS is not set
+# CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET is not set
+# CONFIG_ARM64_SW_TTBR0_PAN is not set
+# CONFIG_ARM64_UAO is not set
+CONFIG_ARM64_VA_BITS=39
+CONFIG_ARM64_VA_BITS_39=y
+# CONFIG_ARM64_VA_BITS_48 is not set
+# CONFIG_ARM64_VHE is not set
+CONFIG_ARMADA_37XX_CLK=y
+CONFIG_ARMADA_AP806_SYSCON=y
+CONFIG_ARMADA_CP110_SYSCON=y
+CONFIG_ARM_AMBA=y
+CONFIG_ARM_ARCH_TIMER=y
+CONFIG_ARM_ARCH_TIMER_EVTSTREAM=y
+CONFIG_ARM_ARMADA_37XX_CPUFREQ=y
+CONFIG_ARM_GIC_V2M=y
+CONFIG_ARM_GIC_V3=y
+CONFIG_ARM_GIC_V3_ITS=y
+# CONFIG_ARM_PL172_MPMC is not set
+CONFIG_ARM_PSCI_FW=y
+# CONFIG_ARM_SP805_WATCHDOG is not set
+CONFIG_AUDIT_ARCH_COMPAT_GENERIC=y
+# CONFIG_COMPAT is not set
+# CONFIG_DEBUG_ALIGN_RODATA is not set
+CONFIG_FRAME_POINTER=y
+CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
+CONFIG_GENERIC_CSUM=y
+CONFIG_GENERIC_IRQ_MIGRATION=y
+CONFIG_GENERIC_PINCONF=y
+CONFIG_GENERIC_TIME_VSYSCALL=y
+CONFIG_HAVE_ALIGNED_STRUCT_PAGE=y
+CONFIG_HAVE_ARCH_HUGE_VMAP=y
+CONFIG_HAVE_ARCH_KASAN=y
+CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
+CONFIG_HAVE_ARCH_VMAP_STACK=y
+CONFIG_HAVE_CMPXCHG_DOUBLE=y
+CONFIG_HAVE_CMPXCHG_LOCAL=y
+CONFIG_HAVE_DEBUG_BUGVERBOSE=y
+CONFIG_HAVE_GENERIC_GUP=y
+CONFIG_HAVE_MEMORY_PRESENT=y
+CONFIG_HAVE_PATA_PLATFORM=y
+CONFIG_HAVE_RCU_TABLE_FREE=y
+# CONFIG_HUGETLBFS is not set
+CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000
+CONFIG_MFD_SYSCON=y
+CONFIG_MMC_SDHCI_XENON=y
+CONFIG_MODULES_USE_ELF_RELA=y
+CONFIG_MVEBU_GICP=y
+CONFIG_MVEBU_ICU=y
+CONFIG_MVEBU_ODMI=y
+CONFIG_MVEBU_PIC=y
+CONFIG_NEED_SG_DMA_LENGTH=y
+# CONFIG_NUMA is not set
+CONFIG_PARTITION_PERCPU=y
+CONFIG_PCI_AARDVARK=y
+CONFIG_PCI_BUS_ADDR_T_64BIT=y
+CONFIG_PGTABLE_LEVELS=3
+CONFIG_PHYS_ADDR_T_64BIT=y
+CONFIG_PINCTRL_ARMADA_37XX=y
+CONFIG_PINCTRL_ARMADA_AP806=y
+CONFIG_PINCTRL_ARMADA_CP110=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_SUPPLY=y
+# CONFIG_RANDOMIZE_BASE is not set
+CONFIG_REGULATOR_GPIO=y
+# CONFIG_SERIAL_AMBA_PL011 is not set
+CONFIG_SPARSEMEM=y
+CONFIG_SPARSEMEM_EXTREME=y
+CONFIG_SPARSEMEM_MANUAL=y
+CONFIG_SPARSEMEM_VMEMMAP=y
+CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
+CONFIG_SPI_ARMADA_3700=y
+CONFIG_SYSCTL_EXCEPTION_TRACE=y
+CONFIG_SYS_SUPPORTS_HUGETLBFS=y
+CONFIG_THREAD_INFO_IN_TASK=y
+CONFIG_VMAP_STACK=y
diff --git a/target/linux/mvebu/cortexa53/target.mk b/target/linux/mvebu/cortexa53/target.mk
new file mode 100644
index 0000000000..acc18d3454
--- /dev/null
+++ b/target/linux/mvebu/cortexa53/target.mk
@@ -0,0 +1,15 @@
+#
+# Copyright (C) 2017 Hauke Mehrtens
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+ARCH:=aarch64
+BOARDNAME:=Marvell Armada 3700LP (ARM64)
+CPU_TYPE:=cortex-a53
+FEATURES+=ext4
+
+KERNELNAME:=Image dtbs