• Chris Metcalf's avatar
    tile: parameterize VA and PA space more cleanly · acbde1db
    Chris Metcalf authored
    The existing code relied on the hardware definition (<arch/chip.h>)
    to specify how much VA and PA space was available.  It's convenient
    to allow customizing this for some configurations, so provide symbols
    MAX_PA_WIDTH and MAX_VA_WIDTH in <asm/page.h> that can be modified
    if desired.
    
    Additionally, move away from the MEM_XX_INTRPT nomenclature to
    define the start of various regions within the VA space.  In fact
    the cleaner symbol is, for example, MEM_SV_START, to indicate the
    start of the area used for supervisor code; the actual address of the
    interrupt vectors is not as important, and can be changed if desired.
    As part of this change, convert from "intrpt1" nomenclature (which
    built in the old privilege-level 1 model) to a simple "intrpt".
    
    Also strip out some tilepro-specific code supporting modifying the
    PL the kernel could run at, since we don't actually support using
    different PLs in tilepro, only tilegx.
    Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
    acbde1db
head_64.S 7.27 KB