1. 29 Dec, 2011 1 commit
    • Greg Ungerer's avatar
      m68k: modify user space access functions to support ColdFire CPUs · e08d703c
      Greg Ungerer authored
      
      
      Modify the user space access functions to support the ColdFire V4e cores
      running with MMU enabled.
      
      The ColdFire processors do not support the "moves" instruction used by
      the traditional 680x0 processors for moving data into and out of another
      address space. They only support the notion of a single address space,
      and you use the usual "move" instruction to access that.
      
      Create a new config symbol (CONFIG_CPU_HAS_ADDRESS_SPACES) to mark the
      CPU types that support separate address spaces, and thus also support
      the sfc/dfc registers and the "moves" instruction that go along with that.
      
      The code is almost identical for user space access, so lets just use a
      define to choose either the "move" or "moves" in the assembler code.
      Signed-off-by: default avatarGreg Ungerer <gerg@uclinux.org>
      Acked-by: default avatarMatt Waddel <mwaddel@yahoo.com>
      Acked-by: default avatarKurt Mahan <kmahan@xmission.com>
      Acked-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
      e08d703c
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