• Git tree (view): http://jcmvbkbc.spb.ru/git/?p=dumb/qemu-xtensa.git;a=summary
• Git tree (clone): git://jcmvbkbc.spb.ru/dumb/qemu-xtensa.git / http://jcmvbkbc.spb.ru/dumb/qemu-xtensa.git

• Toolchain build scripts (view): http://jcmvbkbc.spb.ru/git/?p=dumb/xtensa-toolchain-build.git;a=summary
• Toolchain build scripts (clone): git://jcmvbkbc.spb.ru/dumb/xtensa-toolchain-build.git / http://jcmvbkbc.spb.ru/dumb/xtensa-toolchain-build.git

• cache option implementation;
• debug option implementation;
• cycle accurate pipeline;

• core/basic opcodes implementation;
  • [+] and/or/xor/neg/abs;
  • [+] shifts;
  • [+] add[x*]/sub[x*]/add.n/addi.n;
  • [+] call0, callx0, j, b*;
  • [+] l32*, s32*;
  • [+] accurate SR write semantics;
• options
  • [+] windowed registers;
    • [+] call*/callx*, retw, rotw, rfwo, rfwu;
    • [+] accurate overflow triggering;
  • [+] loop option;
  • [+] extended L32R option;
  • [-] MAC16;
  • [-] coprocessors;
    • [-] floating point;
    • [-] boolean registers/commands;
  • [+] memory protection;
    • [+] no-MMU mode;
    • [+] region protection (with/without translation);
    • [+] MMU mode;
  • cache options;
    • [-] memory attributes;
    • [-] memory access timing;
  • [-] debug option;
  • exceptions;
    • [+] debug (only external);
    • [-] break;
    • [+] window overflow/underflow;
    • [+] user/kernel (invalid insn, privileged insn, alignment, division by 0,…);
    • [+] relocatable vectors;
    • [+] external interrupts;
    • [+] timer interrupts;
      • [-] correct opcode timings?;
      • [+] qemu timer to avoid busy looping in waiti;
• gdbserver;
  • [+] read/write register, xml register map (not used by gdb);
  • [+] correct SR mapping;
  • [+] debug exception, single step mode;
  • [+] hw/sw breakpoints;
  • [+] gdbserver for different processor types;
• sample evaluation board;
  • [+] memory mapping, ELF loader;
  • [-] standard peripherals;
  • [+] dc232b;
• simulation quality;
  • [+] pass command line arguments to argc/argv SIMCALLs (DAN branch only);
  • [+] TB chaining;
  • cycle accuracy;
    • [-] pipeline/SYNC group;
    • [-] memory access;
    • [-] exceptions;
• [+] external configuration (a-la xtensa overlay)?
• [+] automatic regression test suite;

• 2011.04.20: C++ 'hello world' is working in qemu (stdio, stdlib, simcalls, windowed registers, loops, ext l32r) (:
• 2011.04.26: multithreaded ThreadX application is working in qemu (timer interrupts)
• 2011.04.30: preparation for qemu mainline submission started
• 2011.05.04: first RFC patchset sent to qemu-devel http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg00242.html
• 2011.05.18: first PATCH patchset sent to qemu-devel http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01525.html
• 2011.06.19: linux boots, issues on userspace application startup
• 2011.06.22: successfull userspace app startup in linux
• 2011.06.29: xtensa linux session on qemu-xtensa is available at ssh -p 3333 xtensa@jcmvbkbc.spb.ru with the following private key:

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

• 2011.07.18: issue with gdb not able to read privileged SRs root-caused: http://sourceware.org/ml/gdb/2011-07/msg00073.html
• 2011.07.19: tensilica guys suggested the following solution for gdb:

I guess you can just make sure you don't mark new registers as PRIVILEGED in
   ./gdb/xtensa-config.c

• 2011.07.24: second PATCH patchset sent to qemu-devel http://lists.nongnu.org/archive/html/qemu-devel/2011-07/msg02529.html
• 2011.09.01: third PATCH patchset sent to qemu-devel http://lists.nongnu.org/archive/html/qemu-devel/2011-08/msg03888.html
• 2011.09.02: fourth PATCH patchset sent to qemu-devel