#@TYPE: Distribution
#@NAME: NSLU2
#@DESCRIPTION: UcSlugC Linux Distribution for the NSLU2

# Explanation of the naming
#
# nslu2-dist - the base distro configuration for an NSLU2
# nslu2-[bl][at][gu] - a specific configuration encoded as follows:
# b or l - big or little endian
# a or t - ARM or Thumb instructions in the low level libraries
# g or u - glibc or uclibc libc implementation
#
# openslug - the historical name of a canonical nslu2-bag distro,
#            used generically for NSLU2 specific distro features and
#            the default OVERRIDE for all these NSLU2 builds
# ucslugc  - the historical (and obsolte) name of nslu2-btu
#            also the name of a standard nslu2-btu distro with a package feed
#

#----------------------------------------------------------------------------------
# STANDARD NSLU2 DEFINITIONS
#----------------------------------------------------------------------------------
# The following must be set in the top level distro file:
#DISTRO_NAME
#DISTRO_VERSION
#DISTRO_FEED
#DISTRO_TYPE

# The following must also be set, they define the basic format of the build
# The definitions, where present, are the standard defaults.
#NSLU2_ARCH_TYPE = "b" (big-endian) or "l" (little-endian)
#NSLU2_INSTRUCTION_SET = "a" (ARM, 32 bit instructions) or "t" (Thumb, 16 bit instructions)
#NSLU2_OS = "g" (glibc - linx) or "u" (uclibc - linux-uclibc)
#NSLU2_INTERWORK = ":thumb-interwork" or ""
NSLU2_INTERWORK ?= ":thumb-interwork"
#USE_NLS = "no" or "yes"
USE_NLS ?= "no"

# These are default values, changed in the top level.
DISTRO_NAME ?= "nslu2-${NSLU2_ARCH_TYPE}${NSLU2_INSTRUCTION_SET}${NSLU2_OS}"
DISTRO_VERSION ?= "private"
DISTRO_FEED ?= "unstable"
DISTRO_TYPE ?= "alpha"

# The following must not be changed.
TARGET_FPU = "soft"
TARGET_OS = "${@['linux-uclibc', 'linux'][bb.data.getVar('NSLU2_OS', d, 1) == 'g']}"
TARGET_ARCH = "${@['arm', 'armeb'][bb.data.getVar('NSLU2_ARCH_TYPE', d, 1) == 'b']}"

# Select thumb-interwork and thumb
ARM_INSTRUCTION_SET = "${@[':thumb', ''][bb.data.getVar('NSLU2_INSTRUCTION_SET', d, 1) == 'a']}"
ARM_INTERWORK = "${NSLU2_INTERWORK}"

# glib-2.0 builds require USE_NLS to be overridden
USE_NLS_glib-2.0 = "yes"

INHERIT += "package_ipk debian"

# The value of NSLU2_BASE_DISTRO is added to the OVERRIDES after the DISTRO, this
# is set to 'openslug' to pick up the original openslug overrides.  See
# conf/machine/nslu2.conf to find out how this works.
NSLU2_BASE_DISTRO = ":openslug"

# We are building packages which are armvteb (big endian) for arm or thumbv5tb for
# thumb instructions.  The PACKAGE_ARCH should reflect this because generated code
# requires that instruction set support.
PACKAGE_ARCH = "${NSLU2_PACKAGE_ARCH}"

# pull in the frozen list of bbfiles - this sets BBFILES and this will override any
# setting in local.conf  Since this depends on ${DISTRO} it doesn't actually do
# anything by default unless conf/distro/${DISTRO}-packages.conf exists.
include conf/distro/freeze.conf

#----------------------------------------------------------------------------------
# FEEDS
#  The following lines define where on the internet UcSlugC looks for packages
#  when downloading new packages or updating existing packages.  Additional feeds
#  (such as a local feed) can be defined in local.conf
#----------------------------------------------------------------------------------
# Add to the user's feeds from local.conf (there may be none)
#
# This must be specified in the top level distro file, because a feed for one
# distro will not work for another.
#FEED_URIS_append += "cross##http://ipkg.nslu2-linux.org/feeds/${DISTRO}/cross/${DISTRO_FEED}"
#FEED_URIS_append += "native##http://ipkg.nslu2-linux.org/feeds/${DISTRO}/native/${DISTRO_FEED}"
#
#FEED_URIS_append += "unstable_cross##http://ipkg.nslu2-linux.org/feeds/${DISTRO}/cross/unstable"
#FEED_URIS_append += "unstable_native##http://ipkg.nslu2-linux.org/feeds/${DISTRO}/native/unstable"

#----------------------------------------------------------------------------------
# FIRMWARE CONFIGURATION
#----------------------------------------------------------------------------------
# IMAGE BUILD OPTIONS
# -------------------
IMAGE_FSTYPES = "jffs2"
IMAGE_SEX = "${@['little-endian', 'big-endian'][bb.data.getVar('NSLU2_ARCH_TYPE', d, 1) == 'b']}"

OPENSLUG_DEVICE_TABLE = "${@bb.which(bb.data.getVar('BBPATH', d, 1), 'files/device_table-openslug.txt')}"
EXTRA_IMAGECMD_jffs2 = "--pad --${IMAGE_SEX} --eraseblock=0x20000 -D ${OPENSLUG_DEVICE_TABLE}"

# CMDLINE* macros define the kernel command line.  CMDLINE_DEBUG is provided
# to enable/disable debugging in the distro.  Here noirqdebug is used to
# remove the messages about unhandled interrupts - people debugging interrupt
# issues in the kernel need to cancel this (set CMDLINE_DEBUG empty in local.conf)
CMDLINE_DEBUG = "noirqdebug"

# IMAGE_PREPROCESS_COMMAND is run before making the image.  In UcSlugC the
# kernel image is removed from the root file system to recover the space used -
# UcSlugC is assumed to boot from a separate kernel image in flash (not in the
# root file system), if this is not the case the following must not be done!
IMAGE_PREPROCESS_COMMAND = "rm ${IMAGE_ROOTFS}/boot/zImage*;"

# Building a full image.  If you add the following extra commands will be
# appended to the openslug-image build by classes/nslu2-jffs2-image.bbclass
# (note that you can, instead, simply add 'inherit nslu2-jffs2-image' to
# openslug-image.bb).  If you do this you will need to find a source for the
# LinkSys software to be placed in the full image - 'RedBoot' (the boot loader),
# 'Trailer' (just a bunch of bytes to flag the image as valid) and 'SysConf'
# (actually just a block of unset data - you could modify this to pre-configure
# the SysConf partition of the image).  If you own an NSLU2 then this data is
# already in the flash of the NSLU2 and you can download it (including new
# versions) from the LinkSys web site - the bbclass will output information
# about where to put the downloaded data.
#
#NOTE: you do not actually need the boot loader in normal use because it is
# *not* overwritten by a standard upslug upgrade, so you can make an image with
# just non-LinkSys software which can be flashed into the NSLU2.

#INHERIT += "nslu2-jffs2-image"

# EXTRA PACKAGES
# --------------
# UcSlugC builds an openslug-image with no extra packages - to add packages to the
# firmware copy this file (to make a new 'distro' configuration file) and change
# the definition below to include the requirements.
# NOTE: as built this system will *not* be able to boot off anything other than
# the flash file system ('turnup' will not work).  You need to add the filesystem
# modules for your chosen root file system (and any others which will be used).
# See openslug.conf for a more full-featured system!
NSLU2_EXTRA_RDEPENDS ?= ""
NSLU2_EXTRA_DEPENDS ?= ""
#NSLU2_EXTRA_BBFILES above may also need to be set

# These depends define native utilities - they do not get put in the flash.
# upslug2 (in tmp/work/upslug2-native-*) is the program to write the NSLU2 flash
# Override this as desired - it makes no difference to the final image.
NSLU2_NATIVE_DEPENDS ?= "upslug2-native"

OPENSLUG_EXTRA_INSTALL = "${NSLU2_EXTRA_RDEPENDS}"
OPENSLUG_EXTRA_DEPENDS = "${NSLU2_EXTRA_DEPENDS} ${NSLU2_NATIVE_DEPENDS}"

#----------------------------------------------------------------------------------
# PACKAGE VERSION CONTROL
#----------------------------------------------------------------------------------
# Select the correct versions of the compiler tools (note that there
# is also some selection in machine/nslu2.conf)
PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}gcc-initial:gcc-cross-initial"
PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}gcc:gcc-cross"
PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}g++:gcc-cross"
PREFERRED_PROVIDERS += "virtual/${TARGET_PREFIX}depmod:module-init-tools-cross"

# compiler/binary/library versions (unslung uses different ones so these
# cannot be in nslu2.conf)
PREFERRED_VERSION_binutils ?= "2.16"
PREFERRED_VERSION_binutils-cross ?= "2.16"
PREFERRED_VERSION_gcc-cross-initial ?= "3.4.4"
PREFERRED_VERSION_gcc-cross ?= "3.4.4"
PREFERRED_VERSION_gcc ?= "3.4.4"
PREFERRED_VERSION_glibc ?= "2.3.5+cvs20050627"

# Select the correct versions of the kernel and modules (these are the
# defaults, override in the conf/distro top-level distro file).
PREFERRED_PROVIDER_virtual/kernel ?= "nslu2-kernel"
PREFERRED_VERSION_nslu2-kernel ?= "2.6.14-rc5"

# Built-in ethernet modules
PREFERRED_PROVIDER_virtual/ixp-eth ?= "ixp400-eth"
PREFERRED_VERSION_ixp4xx-csr ?= "2.0"
PREFERRED_VERSION_ixp-osal ?= "2.0"
PREFERRED_VERSION_ixp400-eth ?= "1.4"

# Select the smallest provider of x11 libraries
PREFERRED_PROVIDER_x11 ?= "diet-x11"
CVSDATE_diet-x11 ?= "20051005"