• Michael Ellerman's avatar
    [PATCH] powerpc: Fixups for kernel linked at 32 MB · 758438a7
    Michael Ellerman authored
    There's a few places where we need to fix things up for the kernel to work
    if it's linked at 32MB:
    
     - platforms/powermac/smp.c
       To start secondary cpus on pmac we patch the reset vector, which is fine.
       Except if we're above 32MB we don't have enough bits for an absolute branch,
       it needs to relative.
     - kernel/head_64.s
        - A few branches in the cpu hold code need to load the full target address
          and do a bctr.
        - after_prom_start needs to load PHYSICAL_START as the dest address, not 0.
        - The exception prolog needs to load the low word of the target adddress,
          not just the low halfword.
        - Fixup handling of the initial stab address.
     - kernel/setup_64.c
       smp_release_cpus() needs to write 1 to the spinloop flag near 0, not 32 MB.
    Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
    Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
    758438a7
smp.c 22 KB