1. 08 4月, 2015 1 次提交
  2. 17 2月, 2015 1 次提交
    • L
      MIPS: kernel: mips-r2-to-r6-emul: Add R2 emulator for MIPS R6 · b0a668fb
      Leonid Yegoshin 提交于
      MIPS R6 removed quite a few R2 instructions. However, there
      is plenty of <R6 userland code so we add an in-kernel emulator
      so we can still be able to execute all R2 userland out there.
      
      The emulator comes with a handy debugfs under /mips/ directory
      (r2-emul-stats) to provide some basic statistics of the
      instructions that are being emulated.
      
      Below are some statistics from booting a minimal buildroot image:
      
      Instruction     Total   BDslot
      ------------------------------
      movs            236969  0
      hilo            56686   0
      muls            55279   0
      divs            10941   0
      dsps            0       0
      bops            1       0
      traps           0       0
      fpus            0       0
      loads           214981  17
      stores          103364  0
      llsc            56898   0
      dsemul          150418  0
      jr              370158
      bltzl           43
      bgezl           1594
      bltzll          0
      bgezll          0
      bltzal          39
      bgezal          39
      beql            14503
      bnel            138741
      blezl           0
      bgtzl           3988
      Signed-off-by: NLeonid Yegoshin <Leonid.Yegoshin@imgtec.com>
      Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
      b0a668fb