• Paul Mackerras's avatar
    powerpc: Provide a suitable AT_PLATFORM value · 80f15dc7
    Paul Mackerras authored
    The glibc folks want to use AT_PLATFORM to select between possible
    alternative versions of shared libraries.  This commit makes the kernel
    supply an AT_PLATFORM string that indicates what class of processor
    we are running on.  Processors with the same set of user-level
    instructions and roughly the same instruction scheduling characteristics
    are given the same AT_PLATFORM value; for example, 821, 823 and 860
    are all reported as "ppc823", and 7447, 7447A, 7448, 7450, 7451, 7455
    are all called "ppc7450".
    
    The intention is that the AT_PLATFORM values match the values that
    gcc accepts for the -mcpu= option.  For values which are numeric
    (e.g. -mcpu=750), "ppc" has been prepended.
    
    This also adds a PPC_FEATURE_BOOKE bit to the AT_HWCAP value and sets
    it for the 440 family and the Freescale 85xx family.
    Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
    80f15dc7
cputable.c 29.5 KB