| Rev |
Log message |
Author |
Age |
Path |
| 69 |
Massive logic simplification. This is also the first (verified) working
version. |
dgisselq |
2914d 04h |
/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 |
2914d 05h |
/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 |
2914d 05h |
/xulalx25soc/trunk/rtl/cpu/ |
| 66 |
Simplified logic (barely). |
dgisselq |
2914d 05h |
/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 |
2914d 05h |
/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 |
2914d 05h |
/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 |
2914d 05h |
/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 |
2914d 05h |
/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 |
2962d 05h |
/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 |
2972d 03h |
/xulalx25soc/trunk/rtl/cpu/ |
| 50 |
Updates to fix some broken early branching code, both in idecode and pfcache. |
dgisselq |
2981d 06h |
/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 |
2992d 08h |
/xulalx25soc/trunk/rtl/cpu/ |
| 45 |
Minor cosmetic change, eliminates a warning in Xilinx's XISE but offers no
functional difference. |
dgisselq |
2996d 04h |
/xulalx25soc/trunk/rtl/cpu/ |
| 31 |
A bug fix, although one that rearranges the bus. The first four I/O locations
have been adjusted. The new locations are reflected in wishbone.html. In
addition, the PWM and UART devices no longer create bus errors when accessed.
Finally, this version uses a `define XULA25 to determine whether or not to build
for the XuLA2-LX9 or the XuLA2-LX25. If defined, it will build for the
XuLA2-LX25. If not, for the XuLA2-LX9. The ideal location for this define
would be to place it into your Xilinx configuration, should you wish to build
for the LX25. |
dgisselq |
3004d 07h |
/xulalx25soc/trunk/rtl/cpu/ |
| 26 |
Some bug fixes, and the long jump early branching integration. |
dgisselq |
3005d 08h |
/xulalx25soc/trunk/rtl/cpu/ |
| 23 |
This fixes a bug in the early branching system, and clarifies that early
branch instructions will not affect the flags. It's a basic bug fix update. |
dgisselq |
3013d 17h |
/xulalx25soc/trunk/rtl/cpu/ |
| 21 |
Files, not links, to replace what were once broken links in this project. |
dgisselq |
3066d 17h |
/xulalx25soc/trunk/rtl/cpu/ |
| 19 |
Step one in fixing soft link poblems. The following files were soft links,
and not brought into the svn repository properly. They'll be replaced in the
next update with their full sources. |
dgisselq |
3066d 17h |
/xulalx25soc/trunk/rtl/cpu/ |
| 2 |
A very first, albeit incomplete, build. |
dgisselq |
3075d 03h |
/xulalx25soc/trunk/rtl/cpu/ |
