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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 3322d 02h /potato/
25 Add placeholder cache modules and a wishbone arbiter skordal 3324d 07h /potato/
24 Remove unused STRINGIFY macros skordal 3324d 20h /potato/
23 Create branch to use for implementing a cache skordal 3324d 20h /potato/
22 Fix the potato_get_badvaddr() macro skordal 3324d 20h /potato/
21 Upgrade the example design to use a 60 MHz system clock skordal 3324d 21h /potato/
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 3324d 21h /potato/
19 SHA256 benchmark: allow compiler to inline at will skordal 3324d 21h /potato/
18 instr_misalign_check: add do_jump to sensitivity list skordal 3326d 21h /potato/
17 Improve detection of unaligned instructions skordal 3331d 04h /potato/
16 Correct grammar in source code comment skordal 3331d 04h /potato/
15 SHA256 benchmark: fix Makefile syntax error skordal 3337d 20h /potato/
14 Improve detection of invalid instructions skordal 3337d 21h /potato/
13 Add SHA256 benchmark code skordal 3338d 02h /potato/
12 Update example design with correct bug-report URL and testbenches skordal 3338d 04h /potato/
11 Correct FIFO file header skordal 3338d 04h /potato/
10 Add missing FIFO module skordal 3342d 22h /potato/
9 Remove dependency on a non-existent target in the Makefile skordal 3342d 22h /potato/
8 Clarify instruction ROM naming in the example design README skordal 3350d 00h /potato/
7 Add test design for the Nexys 4 board from Digilent skordal 3350d 01h /potato/
6 Add ISA tests skordal 3350d 01h /potato/
5 Update the README, remove .md extension skordal 3352d 06h /potato/
4 Add license skordal 3352d 06h /potato/
3 Fix bug reporting URL skordal 3352d 07h /potato/
2 Initial commit skordal 3352d 09h /potato/
1 The project and the structure was created root 3363d 11h /potato/

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