Rev |
Log message |
Author |
Age |
Path |
113 |
Lots of updates, mostly focused on getting the XuLA board and CPU able to pass
a comprehensive test suite. At this point, everything passes and logic usage
is down even. Among the few changes includes the "break" bit in the uCC
register, used to indicate a switch to supervisor mode occurred as a result
of a user break, and the ability for the supervisor to clear the instruction
cache. |
dgisselq |
2975d 04h |
/xulalx25soc/trunk/rtl/cpu |
98 |
Updated copyright notices for the new year, to reflect that changes have been
made in 2016. |
dgisselq |
2983d 23h |
/xulalx25soc/trunk/rtl/cpu |
89 |
Bug fixes, following the adf_ce logic combining ALU/DIVIDE/FPU pipeline logic
into one register, this fixes that logic so that instructions without their
condition fulfilled are still "executed" and marked as done. |
dgisselq |
3007d 03h |
/xulalx25soc/trunk/rtl/cpu |
87 |
Placed the interrupt into the carry chain for less logic area. |
dgisselq |
3007d 03h |
/xulalx25soc/trunk/rtl/cpu |
86 |
Fine tuning the `defines, so that you can build pipelined without pipelined
bus access and so forth. |
dgisselq |
3007d 03h |
/xulalx25soc/trunk/rtl/cpu |
73 |
Simplified logic. |
dgisselq |
3012d 23h |
/xulalx25soc/trunk/rtl/cpu |
72 |
Sets XULA25 as the default. |
dgisselq |
3012d 23h |
/xulalx25soc/trunk/rtl/cpu |
70 |
Cosmetic (minor) update. |
dgisselq |
3012d 23h |
/xulalx25soc/trunk/rtl/cpu |
69 |
Massive logic simplification. This is also the first (verified) working
version. |
dgisselq |
3012d 23h |
/xulalx25soc/trunk/rtl/cpu |
68 |
Fixes the debug ack line, so it no longer acks when there isn't a dbg_stb.
Fixed the multiply option parameter, so it sets a 3-clock multiply properly.
Adjusted the watchdog timer so that it now produces a timer that doesn't
reload--since this is pointless for a watchdog. Finally, connects a reset
line to the DMA, to make certain that resetting the CPU will also reset any
ongoing DMA operation. |
dgisselq |
3013d 00h |
/xulalx25soc/trunk/rtl/cpu |
67 |
Simplifies logic, and guarantees that the minimum set value will always
produce an int. For example, if the count was X before, setting X-1 wouldn't
produce an interrupt since it had passed. Now it produces an interrupt, and
keeps the next interrupt valid. |
dgisselq |
3013d 00h |
/xulalx25soc/trunk/rtl/cpu |
66 |
Simplified logic (barely). |
dgisselq |
3013d 00h |
/xulalx25soc/trunk/rtl/cpu |
65 |
Makes the auto-reload feature a parameterized (generic) feature, so the same
code will work for both auto-reloadable and non-autoreloadable (i.e. watchdog)
timers. |
dgisselq |
3013d 00h |
/xulalx25soc/trunk/rtl/cpu |
62 |
Removed the pipe logic from the non-pipelined version, and made the NOOP a
specific ALU instruction so that the PC is always properly updated. |
dgisselq |
3013d 00h |
/xulalx25soc/trunk/rtl/cpu |
61 |
Fixed the timing control wires: busy and valid will never both be true. Busy
will be true (now) until valid is asserted, and busy will never not be
asserted until valid is true. |
dgisselq |
3013d 00h |
/xulalx25soc/trunk/rtl/cpu |
60 |
LONG_MPY upgrade. This is part of swapping out the LDIHI instruction for a
MPY, and the MPYS and MPYU instructions for MPYSHI and MPYUHI respectively. |
dgisselq |
3013d 00h |
/xulalx25soc/trunk/rtl/cpu |
52 |
This brings the XuLA2-LX25 SoC up to speed with the rest of the ZipCPU, and
prepares it for the 32x32 bit multiply instruction set change. |
dgisselq |
3061d 00h |
/xulalx25soc/trunk/rtl/cpu |
51 |
Lots of bug fixes. The ugliest were in the prefetch cache, where instructions
from one cache line were being issued as valid in another. Other fixes include
pipeline fixes so that LOD (Rx),Rx; LOD(Rx),Rx works, and more. Finally, the
decode was adjusted so that brev no longer affects the flags. |
dgisselq |
3070d 22h |
/xulalx25soc/trunk/rtl/cpu |
50 |
Updates to fix some broken early branching code, both in idecode and pfcache. |
dgisselq |
3080d 01h |
/xulalx25soc/trunk/rtl/cpu |
46 |
This is a bug fix release--fixing the bug that kept dumpsdram.cpp/wbsdram.v
from working when long pipelined reads were interrupted by the necessity of
a pair of refresh cycles. |
dgisselq |
3091d 03h |
/xulalx25soc/trunk/rtl/cpu |