OpenCores
URL https://opencores.org/ocsvn/potato/potato/trunk

Subversion Repositories potato

[/] - Rev 47

Rev

Go to most recent revision

Filtering Options

Clear current filter

Rev Log message Author Age Path
47 Tag version 0.1 of the Potato Processor skordal 3283d 01h /
46 Remove branch: cache-playground skordal 3285d 19h /
45 Merge branch cache-playground (r23-r30 and r34-r44) into trunk

This primarily adds the following features the the processor:
- A direct-mapped instruction cache with configurable cache line width and
number of cache lines.
- Various bug fixes for bugs that appeared when the processor could run
instructions at full speed but had to stall for data.
- A "Hello World" test application.
skordal 3285d 19h /
44 Add instruction cache and use the WB adapter as dmem interface skordal 3285d 19h /
43 Improve instruction fetch logic skordal 3285d 19h /
42 Move check for stall from irq_asserted to exception_taken in EX stage skordal 3285d 19h /
41 Make continouous status register reads asynchronous skordal 3285d 19h /
40 Reduce example design clock frequency to 50 MHz

- Also includes a minor change to make the address decoder/interconnect work
better with burst transfers.
skordal 3285d 19h /
39 Disable IRQs when handling exceptions skordal 3285d 19h /
38 Add "Hello World" test application skordal 3285d 21h /
37 Add macro to set the TOHOST register from C code skordal 3285d 21h /
36 Ensure correct read of CSR after stall skordal 3285d 21h /
35 Prevent jumping/branching when stalling skordal 3285d 21h /
34 Prevent flushing the pipeline if it is stalling skordal 3285d 21h /
33 Ensure correct read of CSR after stall skordal 3285d 21h /
32 Prevent jumping/branching when stalling skordal 3288d 18h /
31 Prevent flushing the pipeline if it is stalling skordal 3288d 19h /
30 Add testcase for a combination of instructions that fail when using cache skordal 3291d 00h /
29 Add reset functionality for the WB arbiter state machine skordal 3293d 19h /
28 Add rudimentary User's manual skordal 3299d 18h /
27 Prevent exceptions from being taken while stalling skordal 3299d 20h /
26 Prevent exceptions from being taken while stalling

Jumping to an exception handler while stalling and waiting for a load/store
instruction to finish can cause undefined results from the load/store
instruction. This actually fixes the issue mentioned in revision r20.
skordal 3299d 23h /
25 Add placeholder cache modules and a wishbone arbiter skordal 3302d 04h /
24 Remove unused STRINGIFY macros skordal 3302d 17h /
23 Create branch to use for implementing a cache skordal 3302d 17h /
22 Fix the potato_get_badvaddr() macro skordal 3302d 17h /
21 Upgrade the example design to use a 60 MHz system clock skordal 3302d 17h /
20 Fix SHA256 benchmark crash by storing all registers on exception handler entry

This problem will disappear when the processor is updated to conform to the
new supervisor specification, which will allow us to use a compiler that
conforms to the new "official" ABI.
skordal 3302d 18h /
19 SHA256 benchmark: allow compiler to inline at will skordal 3302d 18h /
18 instr_misalign_check: add do_jump to sensitivity list skordal 3304d 18h /

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.