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815 OR1200 debug unit: prevent deadlock when trap instruction stalls

As per mailing list post <20120925160925.5725e06f@latmask.vernier.se>,
the debug unit could deadlock with the instruction decoder if the trap
instruction is held back by a pipeline stall. This change prevents that.

The problem can be reproduced by placing a breakpoint at an unfavorable
position with instruction cache enabled. In our test, this occurred
with or1200-cbasic when placing a breakpoint at test_bss using gdb, but
this is dependent on such factors as cache parameters and compilation
result.
yannv 4249d 07h /openrisc/trunk/or1200/rtl/
813 or1200: Set correct PC after reset when parameter boot_adr is used

Signed-off-by: Olof Kindgren <olof@opencores.org>
Acked-by: Julius Baxter <juliusbaxter@gmail.com>
olof 4264d 00h /openrisc/trunk/or1200/rtl/
808 OR1200: Add DSX bit support to SR.

Updated documentation, revision is now 13.

http://bugzilla.opencores.org/bugzilla4/show_bug.cgi?id=85
julius 4379d 18h /openrisc/trunk/or1200/rtl/
806 OR1200: Fix for bug 90

http://bugzilla.opencores.org/bugzilla4/show_bug.cgi?id=90
julius 4379d 18h /openrisc/trunk/or1200/rtl/
804 OR1200: Fix for bug 91

http://bugzilla.opencores.org/bugzilla4/show_bug.cgi?id=91
julius 4379d 18h /openrisc/trunk/or1200/rtl/
802 OR1200: Fix for bug 88

http://bugzilla.opencores.org/bugzilla4/show_bug.cgi?id=88
julius 4384d 23h /openrisc/trunk/or1200/rtl/
794 ORPSoC, or1200: split out or1200_fpu_intfloat_conv_except module into own file

Fixes lint warnings.
julius 4418d 09h /openrisc/trunk/or1200/rtl/
788 or1200: Patch from R Diez to remove l.cust5 signal from a sensitivty list when it's not defined.

Signed-off-by: R Diez <rdiezmail-openrisc@yahoo.de>
Acked-by: Julius Baxter <juliusbaxter@gmail.com>
julius 4442d 23h /openrisc/trunk/or1200/rtl/
679 Allow setting the boot address as an external
parameter. If no parameter is used, the value
from OR1200_BOOT_ADR will be used

Signed-off-by: Olof Kindgren <olof@opencores.org>
Acked-by: Julius Baxter <juliusbaxter@gmail.com>
olof 4466d 23h /openrisc/trunk/or1200/rtl/
674 or1200: Fix for Bug 76 - Incorrect unsigned integer less-than compare with COMP3 option enabled julius 4509d 08h /openrisc/trunk/or1200/rtl/
644 or1200: the infamous l.rfe fix, and bug fix for when multiply is disabled julius 4647d 22h /openrisc/trunk/or1200/rtl/
643 or1200: new ALU comparision implementation option, TLB invalidate register indicated as not present, multiply overflow detection bug fix julius 4647d 22h /openrisc/trunk/or1200/rtl/
642 or1200: add carry, overflow bits, and range exception julius 4647d 22h /openrisc/trunk/or1200/rtl/
641 or1200: fix serial multiply/divide bug julius 4647d 22h /openrisc/trunk/or1200/rtl/
640 or1200: add l.ext instructions, fix a MAC bug julius 4647d 22h /openrisc/trunk/or1200/rtl/
639 or1200: or1200_dpram.v change task set_gpr to function julius 4647d 23h /openrisc/trunk/or1200/rtl/
481 OR1200 Update. RTL and spec. julius 4873d 14h /openrisc/trunk/or1200/rtl/
401 Fixing find first one (ff1) and find last one (fl1) support in OR1200.

Updated documentation, adding missing l.ff1 and l.fl1 opcodes to supported
instructions table.
julius 4952d 03h /openrisc/trunk/or1200/rtl/
364 OR1200 passes verilator lint. Mainly fixes to widths, and all case statements
altered to casez and Xs changed to ?s.

OR1200 PIC default width back to 31 (was accidentally changed to ORPSoC's 20
last checkin)

OR1200 spec updated to version 0.9, various updates.

OR1200 in ORPSoC and main OR1200 in sync, only difference is defines.
julius 5001d 23h /openrisc/trunk/or1200/rtl/
358 OR1200's reset now configurable as active high or active low. Thanks to patch
from OpenCores contributor Kuoping.

Updated OR1200 in ORPSoCv2 and OR1200 project.
julius 5004d 08h /openrisc/trunk/or1200/rtl/

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