Searched hist:9442 (Results 1 - 2 of 2) sorted by relevance
| /gem5/src/cpu/simple/ | ||
| H A D | timing.hh | diff 9442:36967173340c Mon Jan 07 13:05:00 EST 2013 Andreas Sandberg <Andreas.Sandberg@ARM.com> cpu: Make sure that a drained timing CPU isn't executing ucode Currently, the timing CPU can be in the middle of a microcode sequence or multicycle (stayAtPC is true) instruction when it is drained. This leads to two problems: * When switching to a hardware virtualized CPU, we obviously can't execute gem5 microcode. * If stayAtPC is true we might execute half of an instruction twice when restoring a checkpoint or switching CPUs, which leads to an incorrect execution. After applying this patch, the CPU will be on a proper instruction boundary, which means that it is safe to switch to any CPU model (including hardware virtualized ones). This changeset also fixes a bug where the timing CPU sometimes switches out with while stayAtPC is true, which corrupts the target state after a CPU switch or checkpoint. Note: This changeset removes the so_state variable from checkpoints since the drain state isn't used anymore. |
| H A D | timing.cc | diff 9442:36967173340c Mon Jan 07 13:05:00 EST 2013 Andreas Sandberg <Andreas.Sandberg@ARM.com> cpu: Make sure that a drained timing CPU isn't executing ucode Currently, the timing CPU can be in the middle of a microcode sequence or multicycle (stayAtPC is true) instruction when it is drained. This leads to two problems: * When switching to a hardware virtualized CPU, we obviously can't execute gem5 microcode. * If stayAtPC is true we might execute half of an instruction twice when restoring a checkpoint or switching CPUs, which leads to an incorrect execution. After applying this patch, the CPU will be on a proper instruction boundary, which means that it is safe to switch to any CPU model (including hardware virtualized ones). This changeset also fixes a bug where the timing CPU sometimes switches out with while stayAtPC is true, which corrupts the target state after a CPU switch or checkpoint. Note: This changeset removes the so_state variable from checkpoints since the drain state isn't used anymore. |
Completed in 40 milliseconds