gem5 - gem5

Age	Commit message (Collapse)	Author
2015-09-11	dev, arm: Rewrite the HDLCD controller	Andreas Sandberg
	Rewrite the HDLCD controller to use the new DMA engine and pixel pump. This fixes several bugs in the current implementation: * Broken/missing interrupt support (VSync, underrun, DMA end) * Fragile resolution changes (changing resolutions used to cause assertion errors). * Support for resolutions with a width that isn't divisible by 32. * The pixel clock can now be set dynamically. This breaks checkpoint compatibility. Checkpoints can be upgraded with the checkpoint conversion script. However, upgraded checkpoints won't contain the state of the current frame. That means that HDLCD controllers restoring from a converted checkpoint immediately start drawing a new frame (i.e, expect timing differences).
2015-09-02	sim: tag-based checkpoint versioning	Curtis Dunham
	This commit addresses gem5 checkpoints' linear versioning bottleneck. Since development is distributed across many private trees, there exists a sort of 'race' for checkpoint version numbers: internally a checkpoint version may be used but then resynchronizing with the external tree causes a conflict on that version. This change replaces the linear version number with a set of unique strings called tags. Now the only conflicts that can arise are of tag names, where collisions are much easier to avoid. The checkpoint upgrader (util/cpt_upgrader.py) upgrades the version representation, as one would expect. Each tag version implements its upgrader code in a python file in the util/cpt_upgraders directory rather than adding a function to the upgrader script itself. The version tags are stored in the 'Globals' section rather than 'root' (as the version was previously) because 'Globals' gets unserialized first and can provide a warning before any other unserialization errors can occur.