1 2TUNEVALID[thumb] = "Support Thumb instructions" 3 4# If the device supports ARM, then respect ARM_THUMB_OPT (which can be "arm" or "thumb") 5# If the device doesn't support ARM, then always set "thumb" even when 6# some recipe explicitly sets ARM_INSTRUCTION_SET to "arm" 7ARM_THUMB_OPT = "${@['arm', 'thumb'][d.getVar('ARM_INSTRUCTION_SET') == 'thumb']}" 8ARM_M_OPT = "${@bb.utils.contains('TUNE_FEATURES', 'arm', '${ARM_THUMB_OPT}', 'thumb', d)}" 9 10python () { 11 if bb.utils.contains('TUNE_FEATURES', 'thumb', False, True, d): 12 return 13 selected = d.getVar('ARM_INSTRUCTION_SET') 14 if selected == None: 15 return 16 used = d.getVar('ARM_M_OPT') 17 if selected != used: 18 pn = d.getVar('PN') 19 bb.warn("Recipe '%s' selects ARM_INSTRUCTION_SET to be '%s', but tune configuration overrides it to '%s'" % (pn, selected, used)) 20} 21 22TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'thumb', ' -m${ARM_M_OPT}', '', d)}" 23 24ARM_THUMB_SUFFIX = "t2" 25ARM_THUMB_SUFFIX:armv4 = "t" 26ARM_THUMB_SUFFIX:armv5 = "t" 27ARM_THUMB_SUFFIX:armv6 = "t" 28 29# Add suffix from ARM_THUMB_SUFFIX only if after all this we still set ARM_M_OPT to thumb 30ARMPKGSFX_THUMB .= "${@bb.utils.contains('TUNE_FEATURES', 'thumb', '${ARM_THUMB_SUFFIX}', '', d) if d.getVar('ARM_M_OPT') == 'thumb' else ''}" 31 32# what about armv7m devices which don't support -marm (e.g. Cortex-M3)? 33TARGET_CC_KERNEL_ARCH += "${@bb.utils.contains('TUNE_FEATURES', 'thumb', '-mno-thumb-interwork -marm', '', d)}" 34