#@TYPE: Machine #@NAME: Linksys NSLU2 #@DESCRIPTION: Machine configuration for the Linksys NSLU2 product # NOTE: conf/${DISTRO}.conf is included after this file and may be # used to modify variables set here. #------------------------------------------------------------------------------- # Processor and compilation options #------------------------------------------------------------------------------- #OVERRIDES # ARM processors support both 32('arm') and 16('thumb') bit instruction sets, # The procedure call standard has special provision for inter-calling without # the need to know whether the instruction set of the target procedure # ('interwork'). These options control the instruction set and whether or not # interworking is supported. # # ARM_INTERWORK may be set to :thumb-interwork if required, empty otherwise. # ARM_THUMB may be set to ":thumb" (exactly that, with the leading :) if thumb # instructions are required, empty otherwise. # # These two variables define the instruction set used for compilation and # whether the other (16 or 32 bit) instruction set is supported by the distro. # These options may be changed on a per-package basis, however interwork is # required if the package instruction set does not match the distro option. # To set these in a package simply set the relevant variable to the correct # value, in each case *non-empty* means 'true' - -mthumb-interwork or -mthumb # in the compilation options. #ARM_INTERWORK = ":thumb-interwork" ARM_INTERWORK = "" #ARM_INSTRUCTION_SET = ":thumb" ARM_INSTRUCTION_SET = "" # The OVERRIDES are modified here so that 'NSLU2_BASE_DISTRO' overrides are # picked up if present (${DISTRO} overrides take precedence), ARM_INTERWORK # and ARM_INSTRUCTION_SET overrides are for handling bugs in packages which # cannot deal with the -mthumb-interwork or -mthumb settings. #NSLU2_BASE_DISTRO = ":openslug" NSLU2_BASE_DISTRO = "" OVERRIDES = "local:${MACHINE}:${DISTRO}${NSLU2_BASE_DISTRO}:${TARGET_OS}:${TARGET_ARCH}${ARM_INSTRUCTION_SET}${ARM_INTERWORK}:build-${BUILD_OS}" #COMPILER # Compiler options - passed to TARGET_CC_ARCH ARM_INTERWORK_M_OPT = "${@['-mthumb-interwork', '-mno-thumb-interwork'][bb.data.getVar('ARM_INTERWORK', d, 1) == '']}" ARM_THUMB_M_OPT = "${@['-mthumb', '-mno-thumb'][bb.data.getVar('ARM_INSTRUCTION_SET', d, 1) == '']}" # This was 'include tune-xscale.conf' but that doesn't work # (it would need to be conf/machine/tune-xscale.conf) and # anyway it sets the package architecture to armeb. TARGET_CC_ARCH = "-march=armv5te -mtune=xscale ${ARM_INTERWORK_M_OPT} ${ARM_THUMB_M_OPT}" TARGET_CC_KERNEL_ARCH = "-march=armv5te -mtune=xscale -mno-thumb-interwork -mno-thumb" TARGET_LD_ARCH = "" TARGET_LD_KERNEL_ARCH = "" # Optimization settings. Os works fine and is significantly # better than O2. The other settings are somewhat arbitrary. # The optimisations chosen here include the ones which 'break' # symbolic debugging (because the compiler does not include # enough information to allow the debugger to know where given # values are.) The -fno options are an attempt to cancel explicit # use of space consuming options found in some packages (this isn't # a complete list, this is just the ones which package writers seem # to know about and abuse). FULL_OPTIMIZATION = "-Os -fomit-frame-pointer -frename-registers \ -fno-unroll-loops -fno-inline-functions \ -fweb -funit-at-a-time" # uClibc does not include sinf or cosf, so the gcc auto-use of # these functions must be disabled (this only occurs with -O) #This should be fixed in uclibc 0.9.28 and later #FULL_OPTIMIZATION_append_linux-uclibc = " -fno-builtin-sin -fno-builtin-cos" #------------------------------------------------------------------------------- # 'ARCH' options - package architecture and the 'target' architecture #------------------------------------------------------------------------------- # Historically the 'arch' is armeb, but this causes problems because it is # generic ('armeb' should really only use instructions present on all ARM # processors). Correcting it is difficult, however, because it is written in # to so many places. # # TARGET_ARCH is *wrong* it should be armv5teb or, maybe, thumbv5teb # however many packages have been modified to recognised 'armeb' inside # configure scripts, fixing this up to handle arm*eb or thumb*eb is a # lot of work, so has not yet been done. #NOTE: do *not* change this is a distro.conf, a lot of work is required # to get this fixed. NSLU2_ARCH_TYPE = "b" TARGET_ARCH = "arme${NSLU2_ARCH_TYPE}" # To change to little endian see distro/nslu2-dist.conf # The list of valid architectures for thumb or arm on NSLU2. The arm list is # derived from the architecture settings known to gcc, the thumb list is then # derived from that (only the 't' architectures of course). Note: NSLU2 is # assumed to imply 'big-endian', though in fact this need not be the case. NSLU2_ARM_ARCHITECTURES = "${TARGET_ARCH} armv2${NSLU2_ARCH_TYPE} armv2a${NSLU2_ARCH_TYPE} armv3${NSLU2_ARCH_TYPE} armv3m${NSLU2_ARCH_TYPE} armv4${NSLU2_ARCH_TYPE} armv4t${NSLU2_ARCH_TYPE} armv5${NSLU2_ARCH_TYPE} armv5t${NSLU2_ARCH_TYPE} armv5e${NSLU2_ARCH_TYPE} armv5te${NSLU2_ARCH_TYPE} xscale${NSLU2_ARCH_TYPE}" NSLU2_THUMB_ARCHITECTURES = "thumbe${NSLU2_ARCH_TYPE} thumbv4t${NSLU2_ARCH_TYPE} thumbv5t${NSLU2_ARCH_TYPE}" # NOTE: this list contains just the things which rootfs_ipk.bbclass does not # add, rootfs_ipk.bbclass evaluates: # # ipkgarchs="all any noarch ${TARGET_ARCH} ${IPKG_ARCHS} ${MACHINE}" # # This is a priority ordered list - most desireable architecture at the end, so # put NSLU2_(ARM_INSTRUCTION_SET)_ARCHITECTURES at the end and, if ARM_INTERWORK # precede this with the other architectures. IPKG_ARCHS = "${@(lambda arch_thumb, arch_arm, is_arm, interwork: \ (interwork and (is_arm and arch_thumb or arch_arm) + ' ' or '') \ + (is_arm and arch_arm or arch_thumb)) \ (bb.data.getVar('NSLU2_THUMB_ARCHITECTURES', d, 1), \ bb.data.getVar('NSLU2_ARM_ARCHITECTURES', d, 1), \ bb.data.getVar('ARM_INSTRUCTION_SET', d, 1) == '', \ bb.data.getVar('ARM_INTERWORK', d, 1) != '')}" # The package architecture is 'wrong' - it should be armv5teb or thumbv5teb - # however this setting is retained for backward compatibility as changing it # would mean that old systems would not accept new packages! (armv5teb is not # in the old system list). #NOTE: new distros with independent feeds are encouraged to fix this, the # variable NSLU2_PACKAGE_ARCH is provided for this purpose. PACKAGE_ARCH = "${TARGET_ARCH}" NSLU2_PACKAGE_ARCH = "${@['thumbv5t${NSLU2_ARCH_TYPE}', 'armv5te${NSLU2_ARCH_TYPE}'][bb.data.getVar('ARM_INSTRUCTION_SET', d, 1) == '']}" #------------------------------------------------------------------------------- # Miscellany #------------------------------------------------------------------------------- SERIAL_CONSOLE = "115200 ttyS0" KERNEL_CONSOLE = "ttyS0,115200n8" USE_VT = "0" #------------------------------------------------------------------------------- # Package versions #------------------------------------------------------------------------------- CVSDATE_gnu-config ?= "20050713" CVSDATE_gnu-config-native ?= "20050713" CVSDATE_ipkg-utils ?= "20050713" CVSDATE_ipkg-utils-native ?= "20050713" CVSDATE_ipkg-link ?= "20050713" CVSDATE_irssi ?= "20050930" CVS_TARBALL_STASH = "http://sources.nslu2-linux.org/sources/" INHERIT += "nslu2-mirrors" PREFERRED_VERSION_ipkg ?= "0.99.152" PREFERRED_VERSION_ipkg-native ?= "0.99.152"