[Qemu-devel] [PATCH v9 00/84] Add nanoMIPS support to QEMU

[Aleksandar Markovic]

From: Aleksandar Markovic <address@hidden>

v8->v9:

  - reoganized (moved/squashed) patches so that clang build bisect
     works (as the result, number of patches dropped from 87 to 84)
  - re-examined and reworked 32-bit nanoMIPS branch instructions
  - minor improvements in commit messages  
  - rebased to the latest code

v7->v8:

  - the series is slightly reorganized so that:
      - patches 1-19 are fixes and improvements that are not
      dependent on the existence of nanoMIPS (even though most
      of them are logicaly connected to (and necessary for)
      nanoMIPS support) - they fix and improve pre-nanoMIPS code
      - patches 20-65 introduce core nanoMIPS functionality, but
      do not contain any dependence on or reference to nanoMIPS
      Linux ABI
      - patches 66-87 mostly deal with Linux user mode-related
      nanoMIPS functionality, therefore dependent on nanoMIPS
      Linux ABI
  - the series will probably be split into three (corresponding
      to the organization mentioned above) in near future

  - added support for availability control via bit config XNP
  - fixed availabitily control for LLWP/SCWP
  - added support for availability control via bit config MT
  - fixed availabitily control for pre-nanoMIPS MT ASE
  - fixed availabitily control for nanoMIPS MT ASE
  - completely removed case-statements defined by integer range
      from translate.c
  - patch on nanoMIPS specifics in ELF headers split into two
  - patch on GT64120-related functionality in nanoMIPS bootloader
      updated with comments and reorganizes with respect to
      endianness
  - replaced one instance of shift/mask with extract32()
  - fixed one instance of missing default case in decoding engine
  - removed several instances of unnecessary default case in
    decoding engine
  - minor tweaks related to variable scope and naming
  - fixed several spelling mistakes in commit messages
  - rebased to the latest code

v6->v7:

  - found a better place for MIPS_ARCH in elf.h
  - improved patch for LLWP and SCWP
  - fixed missing availability control, alignment, usage
    of extract32() in DSP patches
  - added disassembler support for microMIPS and nanoMIPS
  - removed unnecessary addition of one empty line in the
    patch on WR bit
  - improved statx() syscall translation
  - improved nanoMIPS items in binfmt script
  - amended pre-nanoMIPS items in qemu-doc.texi
  - added nanoMIPS items in qemu-doc.texi
  - changed slightly patch order to be logicaly more
    comprehensive 
  - rebased to the latest code
  - NOTE: there will be some sheckpatch.pl errors and warning
    for this series; however, we think those are flase positives
    in these particular circumstances - therefore we will not
    change any patch related to these checkpatch.pl messages

v5->v6:

  - used names offset and imm instead of rd and rs when
    appropriate
  - used gen_op_addr_addi when appropriate in one more place
  - avoided usage of tcg_temp_local_new
  - avoided unnecessary sign extension related to addr_add
  - fixed unprotected storing to cpu_gpr[0]
  - removed some unnecessary testing for ISA_NANOMIPS
  - updated patch for LLWP and SCWP
  - extract32 inserted instead of shift/mask in DSP patches
  - removed useless casts from DSP patches
  - reorganized functions to eliminated duplicated loading of
    gpr values into tcg variables in DSP patches
  - check Config1.WR bit for Watch registers only when using
    in runtime
  - removed duplicated check for bad address in PC register
  - added support for statx system call
  - updated script qemu-binfmt-conf.sh for nanoMIPS
  - rebased to the latest code

v4->v5:

  - merged series "Mips maintenance and misc fixes and improvements"
    and this one for easier handling (there are build dependencies)
  - eliminated shadow variables from translate.c
  - replaced shift/mask combination with extract32()
  - added new function gen_op_addr_addi()
  - added patch for LLWP and SCWP
  - added "fall through" comments at appropriate places
  - eliminated micromips flag from I7200 definition
  - numerous other enhancements originating from reviewer's
    comments
  - some of the patches split into two or more for easier
    handling and review
  - rebased to the latest code

v3->v4:

  - added support for nanoMIPS user mode functionality and
    configuration
  - DSP patch split into three for easier review and handling
  - corrected indentation in all decoding engine patches
  - shift/mask replaced with equivalent extract32() in some
    patches
  - added missing default cases in some patches
  - refactored invocation logic aroung decode_nanomips_opc()
  - improved comments before decode_gpr_XXX() utilities
  - all four decode_gpr_XXX() are now in a single patch
  - two patches on updating BadInstr and related registers
    are now merged, and execution logic improved
  - minor formatting corrections
  - rebased to the latest code

v2->v3:

  - added support for nanoMIPS-specifics in ELF headers
  - added support for CP0 Config0.WR bit
  - updated I7200 definition
  - improved indentation of some switch statements
  - slight reorganization of patches (splitting, order)
  - rebased to the latest code

v1->v2:

  - added DSP ASE support
  - added MT ASE support
  - added GDB XML support
  - order of patches changed
  - commit messages and patch title improved across the board
  - obsolete email addresses for authors and cosigners replaced
    with the right ones
  - some functions renamed to reflect better the documentation
  - some macros renamed to reflect better their nanoMIPS nature
  - streamlined formatting
  - some of other reviewer's comments addressed, but the majority
    was not; this is because the focus of this version was on
    completing the functionality as much as possible; remaining
    comments will be addressed in the subsequent versions of this
    series

This series of patches implements recently announced nanoMIPS on QEMU.
nanoMIPS is a variable length ISA containing 16, 32 and 48-bit wide
instructions. It is designed to be portable at assembly level with
other MIPS and microMIPS code, but contains a number of changes that
enhance code density and efficiency. The largest portion of patches
is nanoMIPS decoding engine.

For more information, please refer to the following link:

https://www.mips.com/products/architectures/nanomips/

Aleksandar Markovic (16):
  MAINTAINERS: Update target/mips maintainer's email addresses
  target/mips: Avoid case statements formulated by ranges - part 1
  target/mips: Mark switch fallthroughs with interpretable comments
  target/mips: Fix two instances of shadow variables
  target/mips: Update some CP0 registers bit definitions
  elf: Remove duplicate preprocessor constant definition
  elf: Add ELF flags for MIPS machine variants
  linux-user: Update MIPS syscall numbers up to kernel 4.18 headers
  qemu-doc: Amend MIPS-related items
  target/mips: Add preprocessor constants for nanoMIPS
  target/mips: Add placeholder and invocation of decode_nanomips_opc()
  target/mips: Add nanoMIPS decoding and extraction utilities
  elf: Relax MIPS' elf_check_arch() to accept EM_NANOMIPS too
  elf: Don't check FCR31_NAN2008 bit for nanoMIPS
  linux-user: Update syscall_defs.h header for nanoMIPS
  qemu-doc: Add nanoMIPS-related items

Aleksandar Rikalo (18):
  target/mips: Avoid case statements formulated by ranges - part 2
  linux-user: Add preprocessor availability control to some syscalls
  target/mips: Implement emulation of nanoMIPS LLWP/SCWP pair
  target/mips: Fix pre-nanoMIPS MT ASE instructions availability control
  elf: Add EM_NANOMIPS value as a valid one for e_machine field
  elf: On elf loading, treat both EM_MIPS and EM_NANOMIPS as legal for
    MIPS
  elf: Add nanoMIPS specific variations in ELF header fields
  linux-user: Add syscall numbers for nanoMIPS
  linux-user: Add target_signal.h header for nanoMIPS
  linux-user: Add termbits.h header for nanoMIPS
  linux-user: Add target_fcntl.h header for nanoMIPS
  linux-user: Add sockbits.h header for nanoMIPS
  linux-user: Add target_syscall.h header for nanoMIPS
  linux-user: Add support for nanoMIPS signal trampoline
  linux-user: Amend support for sigaction() syscall for nanoMIPS
  linux-user: Add support for statx() syscall for all platforms
  linux-user: Add support for nanoMIPS core files
  linux-user: Add nanoMIPS support in scripts/qemu-binfmt-conf.sh

Dimitrije Nikolic (5):
  linux-user: Add target_cpu.h header for nanoMIPS
  linux-user: Add target_structs.h header for nanoMIPS
  linux-user: Add target_elf.h header for nanoMIPS
  linux-user: Add signal.c for nanoMIPS
  linux-user: Add cpu_loop.c for nanoMIPS

James Hogan (5):
  target/mips: Implement emulation of nanoMIPS EXTW instruction
  target/mips: Adjust exception_resume_pc() for nanoMIPS
  target/mips: Adjust set_hflags_for_handler() for nanoMIPS
  target/mips: Adjust set_pc() for nanoMIPS
  gdbstub: Disable handling of nanoMIPS ISA bit in the MIPS gdbstub

Matthew Fortune (4):
  target/mips: Implement emulation of nanoMIPS ROTX instruction
  disas: Add support for microMIPS and nanoMIPS
  target/mips: Add handling of ISA mode bit for nanoMIPS
  mips_malta: Add basic nanoMIPS boot code for Malta board

Paul Burton (1):
  mips_malta: Add setting up GT64120 BARs to the nanoMIPS bootloader

Stefan Markovic (17):
  target/mips: Add CP0 BadInstrX register
  target/mips: Implement CP0 Config1.WR bit functionality
  target/mips: Add nanoMIPS DSP ASE opcodes
  target/mips: Add emulation of nanoMIPS 16-bit save and restore
    instructions
  target/mips: Add emulation of nanoMIPS 32-bit branch instructions
  target/mips: Implement MT ASE support for nanoMIPS
  target/mips: Add emulation of DSP ASE for nanoMIPS - part 1
  target/mips: Add emulation of DSP ASE for nanoMIPS - part 2
  target/mips: Add emulation of DSP ASE for nanoMIPS - part 3
  target/mips: Add emulation of DSP ASE for nanoMIPS - part 4
  target/mips: Add emulation of DSP ASE for nanoMIPS - part 5
  target/mips: Add emulation of DSP ASE for nanoMIPS - part 6
  target/mips: Add updating BadInstr, BadInstrP, BadInstrX for nanoMIPS
  mips_malta: Fix semihosting argument passing for nanoMIPS bare metal
  target/mips: Add definition of nanoMIPS I7200 CPU
  linux-user: Add nanoMIPS linux user mode configuration support
  gdbstub: Add XML support for GDB for nanoMIPS

Yongbok Kim (18):
  target/mips: Don't update BadVAddr register in Debug Mode
  target/mips: Check ELPA flag only in some cases of MFHC0 and MTHC0
  target/mips: Add nanoMIPS base instruction set opcodes
  target/mips: Add emulation of nanoMIPS 16-bit arithmetic instructions
  target/mips: Add emulation of nanoMIPS 16-bit branch instructions
  target/mips: Add emulation of nanoMIPS 16-bit shift instructions
  target/mips: Add emulation of nanoMIPS 16-bit misc instructions
  target/mips: Add emulation of nanoMIPS 16-bit load and store
    instructions
  target/mips: Add emulation of nanoMIPS 16-bit logic instructions
  target/mips: Add emulation of some common nanoMIPS 32-bit instructions
  target/mips: Add emulation of nanoMIPS instructions MOVE.P and
    MOVE.PREV
  target/mips: Add emulation of nanoMIPS 48-bit instructions
  target/mips: Add emulation of nanoMIPS FP instructions
  target/mips: Add emulation of misc nanoMIPS instructions (pool32a0)
  target/mips: Add emulation of misc nanoMIPS instructions (pool32axf)
  target/mips: Add emulation of misc nanoMIPS instructions (p_lsx)
  target/mips: Add emulation of nanoMIPS 32-bit load and store
    instructions
  target/mips: Fix ERET/ERETNC behavior related to ADEL exception

 .mailmap                                |     7 +-
 MAINTAINERS                             |    12 +-
 configure                               |    13 +-
 default-configs/nanomips-linux-user.mak |     1 +
 disas/Makefile.objs                     |     1 +
 disas/mips.c                            |   358 +-
 disas/nanomips.cpp                      | 15752 ++++++++++++++++++++++++++++++
 disas/nanomips.h                        |  1208 +++
 gdb-xml/nanomips-cp0.xml                |    13 +
 gdb-xml/nanomips-cpu.xml                |    44 +
 gdb-xml/nanomips-dsp.xml                |    20 +
 gdb-xml/nanomips-fpu.xml                |    45 +
 gdb-xml/nanomips-linux.xml              |    20 +
 hw/mips/mips_malta.c                    |   212 +-
 include/disas/bfd.h                     |     1 +
 include/elf.h                           |    44 +-
 include/hw/elf_ops.h                    |     8 +
 linux-user/elfload.c                    |    12 +-
 linux-user/mips/cpu_loop.c              |    36 +-
 linux-user/mips/signal.c                |    36 +-
 linux-user/mips/syscall_nr.h            |     9 +
 linux-user/mips/termbits.h              |     4 +
 linux-user/mips64/syscall_nr.h          |    18 +
 linux-user/nanomips/cpu_loop.c          |     1 +
 linux-user/nanomips/signal.c            |     1 +
 linux-user/nanomips/sockbits.h          |     1 +
 linux-user/nanomips/syscall_nr.h        |   275 +
 linux-user/nanomips/target_cpu.h        |    21 +
 linux-user/nanomips/target_elf.h        |    14 +
 linux-user/nanomips/target_fcntl.h      |    38 +
 linux-user/nanomips/target_signal.h     |    22 +
 linux-user/nanomips/target_structs.h    |     1 +
 linux-user/nanomips/target_syscall.h    |    30 +
 linux-user/nanomips/termbits.h          |     1 +
 linux-user/strace.c                     |    14 +-
 linux-user/syscall.c                    |   150 +-
 linux-user/syscall_defs.h               |    95 +-
 qemu-doc.texi                           |    15 +-
 scripts/qemu-binfmt-conf.sh             |    16 +-
 target/mips/cpu.c                       |    12 +-
 target/mips/cpu.h                       |   164 +-
 target/mips/gdbstub.c                   |    13 +-
 target/mips/helper.c                    |    35 +-
 target/mips/helper.h                    |     2 +
 target/mips/internal.h                  |     9 +-
 target/mips/machine.c                   |     5 +-
 target/mips/mips-defs.h                 |     4 +
 target/mips/op_helper.c                 |   113 +-
 target/mips/translate.c                 |  5132 +++++++++-
 target/mips/translate_init.inc.c        |    39 +
 50 files changed, 23853 insertions(+), 244 deletions(-)
 create mode 100644 default-configs/nanomips-linux-user.mak
 create mode 100644 disas/nanomips.cpp
 create mode 100644 disas/nanomips.h
 create mode 100644 gdb-xml/nanomips-cp0.xml
 create mode 100644 gdb-xml/nanomips-cpu.xml
 create mode 100644 gdb-xml/nanomips-dsp.xml
 create mode 100644 gdb-xml/nanomips-fpu.xml
 create mode 100644 gdb-xml/nanomips-linux.xml
 create mode 100644 linux-user/nanomips/cpu_loop.c
 create mode 100644 linux-user/nanomips/signal.c
 create mode 100644 linux-user/nanomips/sockbits.h
 create mode 100644 linux-user/nanomips/syscall_nr.h
 create mode 100644 linux-user/nanomips/target_cpu.h
 create mode 100644 linux-user/nanomips/target_elf.h
 create mode 100644 linux-user/nanomips/target_fcntl.h
 create mode 100644 linux-user/nanomips/target_signal.h
 create mode 100644 linux-user/nanomips/target_structs.h
 create mode 100644 linux-user/nanomips/target_syscall.h
 create mode 100644 linux-user/nanomips/termbits.h

-- 
2.7.4