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#@TYPE: Machine configuration
#@NAME: ixp4xx
#@DESCRIPTION: genric machine configuration for ixp4xx platforms
MACHINE_FEATURES = "kernel26 usbhost ext2"
EXTRA_IMAGECMD_jffs2 = "--pad --eraseblock=0x20000 --faketime -n"
PREFERRED_PROVIDER_virtual/kernel ?= "ixp4xx-kernel"
#-------------------------------------------------------------------------------
# INPUTS
#-------------------------------------------------------------------------------
# conf/${DISTRO}.conf is included after this file and should be used to modify
# variables identified as 'INPUTS' to the required values for the DISTRO, this
# will cause the board specific settings (which depend for the most part on the
# exact CPU used) to be set correctly within this file. The results are the
# variables identifies here as 'OUTPUTS'
#
#variable = "default"
# <possible values>
# description
IXP4XX_MACHINE_ENDIAN ?= "le"
# "be" "le"
# The memory byte sex and (on correctly implemented hardware - the IXP4XX is
# correct) the byte sex of the buses within the system. 'be' (big-endian)
# means that the first byte is the most significant byte on a bus, 'le'
# (little-endian) means that the first byte is the least significant byte.
# Default to little-endian mode (since EABI does not support big endian yet)
ARM_INSTRUCTION_SET = "arm"
# "arm" "thumb"
# The instruction set the compiler should use when generating application
# code. The kernel is always compiled with arm code at present. arm code
# is the original 32 bit ARM instruction set, thumb code is the 16 bit
# encoded RISC sub-set. Thumb code is smaller (maybe 70% of the ARM size)
# but requires more instructions (140% for 70% smaller code) so may be
# slower.
THUMB_INTERWORK = "yes"
# "yes" "no"
# Whether to compile with code to allow interworking between the two
# instruction sets. This allows thumb code to be executed on a primarily
# arm system and vice versa. It is strongly recommended that DISTROs not
# turn this off - the actual cost is very small.
DISTRO_BASE = ""
# "" ":<base>"
# If given this must be the name of a 'distro' to add to the bitbake OVERRIDES
# after ${DISTRO}, this allows different distros to share a common base of
# overrides. The value given must include a leading ':' or chaos will result.
#-------------------------------------------------------------------------------
# OUTPUTS
#-------------------------------------------------------------------------------
#OVERRIDES
# The standard ':' separated list of overrides used by bitbake - see the
# basic setting in bitbake.conf. This list is based on that used for the
# standard setting however :<base> will be
# inserted at appropriate points if a base distro is enabled in the inputs.
OVERRIDES = "local:${MACHINE}:ixp4xx:${DISTRO}${DISTRO_BASE}:${TARGET_OS}:${TARGET_ARCH}:build-${BUILD_OS}:fail-fast"
require conf/machine/include/tune-xscale.conf
require conf/machine/include/tune-thumb.conf
#-------------------------------------------------------------------------------
# Board defaults
#-------------------------------------------------------------------------------
# These values are board specific but they seem to be common to a large number
# of boards so are reasonable defaults.
SERIAL_CONSOLE = "115200 ttyS0"
KERNEL_CONSOLE = "ttyS0,115200n8"
USE_VT = "0"
# FULL_OPTIMIZATION
# Optimization settings. Os works fine and is significantly better than O2.
# The other settings are somewhat arbitrary. The optimisations chosen here
# include the ones which 'break' symbolic debugging (because the compiler does
# not include enough information to allow the debugger to know where given
# values are.) The -fno options are an attempt to cancel explicit use of space
# consuming options found in some packages (this isn't a complete list, this is
# just the ones which package writers seem to know about and abuse).
FULL_OPTIMIZATION = "-Os -fomit-frame-pointer -frename-registers \
-fno-unroll-loops -fno-inline-functions \
-fweb -funit-at-a-time"
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