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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 3315d 09h /
25 Add placeholder cache modules and a wishbone arbiter skordal 3317d 13h /
24 Remove unused STRINGIFY macros skordal 3318d 02h /
23 Create branch to use for implementing a cache skordal 3318d 02h /
22 Fix the potato_get_badvaddr() macro skordal 3318d 03h /
21 Upgrade the example design to use a 60 MHz system clock skordal 3318d 03h /
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 3318d 03h /
19 SHA256 benchmark: allow compiler to inline at will skordal 3318d 03h /
18 instr_misalign_check: add do_jump to sensitivity list skordal 3320d 03h /
17 Improve detection of unaligned instructions skordal 3324d 10h /
16 Correct grammar in source code comment skordal 3324d 10h /
15 SHA256 benchmark: fix Makefile syntax error skordal 3331d 03h /
14 Improve detection of invalid instructions skordal 3331d 04h /
13 Add SHA256 benchmark code skordal 3331d 08h /
12 Update example design with correct bug-report URL and testbenches skordal 3331d 10h /
11 Correct FIFO file header skordal 3331d 11h /
10 Add missing FIFO module skordal 3336d 04h /
9 Remove dependency on a non-existent target in the Makefile skordal 3336d 04h /
8 Clarify instruction ROM naming in the example design README skordal 3343d 07h /
7 Add test design for the Nexys 4 board from Digilent skordal 3343d 07h /

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