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Review request for Default, Ali Saidi, Gabe Black, Steve Reinhardt, and Nathan Binkert. Summary ------- O3: Fix corner case squashing into the microcode ROM. When fetching from the microcode ROM, if the PC is set so that it isn't in the cache block that's been fetched the CPU will get stuck. The fetch stage notices that it's in the ROM so it doesn't try to fetch from the current PC. It then later notices that it's outside of the current cache block so it skips generating instructions expecting to continue once the right bytes have been fetched. This change lets the fetch stage attempt to generate instructions, and only checks if the bytes it's going to use are valid if it's really going to use them. Diffs ----- src/cpu/o3/fetch_impl.hh ac1bd3d1aa54 Diff: http://reviews.m5sim.org/r/501/diff Testing ------- Thanks, Gabe
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