1*4882a593Smuzhiyun2016/09/30 - Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> 2*4882a593Smuzhiyun - Add Release 6 support 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun2012/03/30 - Mark Hatle <mark.hatle@windriver.com> 5*4882a593Smuzhiyun - Initial Version 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunMIPS currently defines 12 ABIs. Combinations of: 8*4882a593Smuzhiyun *) Big/Little Endian 9*4882a593Smuzhiyun *) Hardware/Software Floating Point 10*4882a593Smuzhiyun *) o32, n32, n64 ABI 11*4882a593Smuzhiyun 12*4882a593SmuzhiyunRelease 6 of the ISA is a major revision and doesn't build up on previous 13*4882a593Smuzhiyunreleases of the ISA. 14*4882a593Smuzhiyun 15*4882a593SmuzhiyunFor more details about tuples, check https://wiki.debian.org/Multiarch/Tuples 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunTUNE_ARCH, the GNU canonical arch, is defined as: 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun"mips${MIPSPKGSFX_32R6}${MIPSPKGSFX_64R6}${MIPSPKGSFX_BYTE}${MIPSPKGSFX_R6}${MIPSPKGSFX_ENDIAN}" 20*4882a593Smuzhiyun 21*4882a593SmuzhiyunThe package arch is defined in such a way to generated a standard naming 22*4882a593Smuzhiyunscheme. The scheme is: <mips variant>[-nf][-n32] 23*4882a593Smuzhiyun 24*4882a593SmuzhiyunTUNE_PKGARCH is defined as: 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun${MIPSPKGSFX_VARIANT:tune-${DEFAULTTUNE}}${MIPSPKGSFX_FPU}${MIPSPKGSFX_ABI} 27*4882a593Smuzhiyun 28*4882a593SmuzhiyunThe following is a list of MIPS specific variables: 29*4882a593Smuzhiyun 30*4882a593SmuzhiyunMIPSPKGSFX_BYTE - This is defined as either blank and "64" for MIPS64 CPUs. 31*4882a593Smuzhiyun 32*4882a593SmuzhiyunMIPSPKGSFX_ENDIAN - For bigendian hardware this is blank, otherwise it's 33*4882a593Smuzhiyundefined as "el". 34*4882a593Smuzhiyun 35*4882a593SmuzhiyunMIPSPKGSFX_ENDIAN2 - For bigendian hardware this is "eb", otherwise it's 36*4882a593Smuzhiyundefined as "el". 37*4882a593Smuzhiyun 38*4882a593SmuzhiyunMIPSPKGSFX_VARIANT:tune-<tune> - In the default tunings it is set to the 39*4882a593Smuzhiyunsame value as TUNE_ARCH. In custom, optimized tunings, the value should 40*4882a593Smuzhiyunbe modified to more precisely describe the tuning. 41*4882a593Smuzhiyun 42*4882a593SmuzhiyunMIPSPKGSFX_FPU - The value is set to "" or "-nf", where "-nf" indicates 43*4882a593Smuzhiyunthat the tune is using a non-floating point ABI. 44*4882a593Smuzhiyun 45*4882a593SmuzhiyunMIPSPKGSFX_ABI - This is used to specify an alternative ABI when the previous 46*4882a593Smuzhiyunvalues are not enough to distringuish the package. "-n32" is added when 47*4882a593Smuzhiyunbuilding for N32 ABI. 48*4882a593Smuzhiyun 49*4882a593SmuzhiyunMIPSPKGSFX_R6 - This is used to specify the presence of release 6. 50*4882a593Smuzhiyun"r6" is added in the tuple for release 6 of the isa. 51*4882a593Smuzhiyun 52*4882a593SmuzhiyunMIPSPKGSFX_64R6 - This is used to specify "isa" in the tuple. 53*4882a593SmuzhiyunRelease 6 onwards we use "mipsisa64" instead of just "mips64". 54*4882a593Smuzhiyun 55*4882a593SmuzhiyunMIPSPKGSFX_32R6 - This is used to specify "isa32" in the tuple. 56*4882a593SmuzhiyunRelease 6 onwards we use "mipsisa32" instead of just "mips". 57