Wesley W. Terpstra
200c69c106
ahb: support hmastlock acquistion of crossbar
2016-05-24 14:20:45 -07:00
Wesley W. Terpstra
e1e8eda419
ahb: add a test SRAM
2016-05-24 14:20:42 -07:00
Wesley W. Terpstra
1db40687c6
ahb: eliminate now-unnecesary non-standard hreadyin
2016-05-24 14:14:22 -07:00
Wesley W. Terpstra
15cad8414d
ahb: put signals in the order they appear in signal traces in the spec
2016-05-24 14:14:22 -07:00
Wesley W. Terpstra
f30f8d9f79
ahb: reduce obsolete degenerate cases of a crossbar
2016-05-24 14:14:22 -07:00
Wesley W. Terpstra
0368b6db6b
ahb: replace defective crossbar with a functional one
...
The previous crossbar had the following bugs:
1. a bursting master could be preempted
the AHB-lite spec requires a slave receive the entire burst
2. a waited master could be replaced
the AHB-lite spec requires haddr/etc to remain unchanged
3. hmastlock did no ensure exclusive access
atomic operations could be pre-empted
2016-05-24 14:14:22 -07:00
Wesley W. Terpstra
2b37f37335
ahb: helper methods
2016-05-24 14:14:21 -07:00
Wesley W. Terpstra
ef2aae26a8
ahb: rename hreadyout to standard hready, mark hreadyin for death
2016-05-24 14:14:21 -07:00
Wesley W. Terpstra
2f8a77f27a
ahb: include all AHB-lite constants
2016-05-24 14:14:21 -07:00
Wesley W. Terpstra
7896c4157e
ahb: parameterize poci
2016-05-24 14:14:21 -07:00
Wesley W. Terpstra
93447eb274
ahb: make hasti parameters location sensitive
2016-05-24 14:14:17 -07:00
Wesley W. Terpstra