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ARM: vf610m4: add defconfig for Linux on Vybrids Cortex-M4

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Add defconfig for Linux on Vybrid (vf610) on the secondary Cortex-
M4 CPU. The use of a XIP image has been tested which needs to be
loaded (e.g. using the custom m4boot loader) to the end of the
available RAM at address 0x8f000000. The Cortex-M4 has a code-alias
which makes sure that the instructions get fetched through the code
bus (alias starts at 0x00800000 => 0x80800000 in system address).
Hence, to get optimal performance, use 0x0f000000 as XIP_PHYS_ADDR.
This address is additionally shifted by the length of the minimal
loader which is inserted by m4boot. Currently, this offset is 0x80.

The standard DRAM base address is configured to 0x8C000000, which
gives the Cortex-M4 48MiB of RAM.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Stefan Agner 2015-05-20 00:06:22 +02:00 committed by Arnd Bergmann
parent 03c1fb7e96
commit b4423bb834
1 changed files with 42 additions and 0 deletions
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42
arch/arm/configs/vf610m4_defconfig Normal file
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CONFIG_NAMESPACES=y
CONFIG_BLK_DEV_INITRD=y
# CONFIG_RD_BZIP2 is not set
# CONFIG_RD_LZMA is not set
# CONFIG_RD_XZ is not set
# CONFIG_RD_LZ4 is not set
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
# CONFIG_MMU is not set
CONFIG_ARM_SINGLE_ARMV7M=y
CONFIG_ARCH_MXC=y
CONFIG_SOC_VF610=y
CONFIG_SET_MEM_PARAM=y
CONFIG_DRAM_BASE=0x8c000000
CONFIG_FLASH_MEM_BASE=0x8f000000
CONFIG_FLASH_SIZE=0x01000000
CONFIG_CMDLINE="console=/dev/ttyLP2"
CONFIG_XIP_KERNEL=y
CONFIG_XIP_PHYS_ADDR=0x0f000080
CONFIG_BINFMT_FLAT=y
CONFIG_BINFMT_ZFLAT=y
CONFIG_BINFMT_SHARED_FLAT=y
# CONFIG_SUSPEND is not set
# CONFIG_UEVENT_HELPER is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
# CONFIG_ALLOW_DEV_COREDUMP is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=4
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_KEYBOARD_ATKBD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
CONFIG_SERIAL_FSL_LPUART=y
CONFIG_SERIAL_FSL_LPUART_CONSOLE=y
# CONFIG_HW_RANDOM is not set
CONFIG_MFD_SYSCON=y
# CONFIG_HID is not set
# CONFIG_USB_SUPPORT is not set
# CONFIG_MISC_FILESYSTEMS is not set
# CONFIG_FTRACE is not set