[PATCH v3 00/16] common: introduce bthreads, co-operative

[Ahmad Fatoum]

Current state of CONFIG_HAS_ARCH_SJLJ

    [x] arm 32-bit (Ahmad)
    [x] arm 64-bit (Sascha)
    [x] mips (Sascha)
    [x] powerpc (Sascha)
    [x] riscv (Sascha)
    [x] sandbox (Ahmad)
    [-] nios2 (Removed; Sascha)
    [x] x86 32-bit (Ahmad)
    [x] x86 64-bit (Ahmad)
    [x] openrisc (Stafford)
    [x] kvx (Jules)

Legend: [-] arch removed, [x] implemented

Changes since v2:
  - Reworked bthread_reschedule(): Threads now always schedule the next
    thread in the runqueue. Simplifies code and saves context switch back
    to scheduler
  - Removed assert_command_context yield. Will need further rework until
    it's usable, so just warn for now like with pollers
  - Added resched() to collect the reschedule bits in one place
  - Migrate LED poller as an example
  - Rework bthread command to use API better
  - Split up commits for shorter, reworked, commit messages
  - Fixed poor English and copy-paste errors (Peter Korsgaard)
  - Marked RISC-V and MIPS CONFIG_HAS_ARCH_SJLJ explicitly 32-bit only
    (Peter Mamonov)
  - Added x86 implementations (tested on EFI x86_64 and i386 sandbox)

Cheers,
Ahmad Fatoum (10):
  common: introduce HAS_ARCH_SJLJ
  ARM: asm: setjmp: annotate setjmp/longjmp for GCC
  ARM: asm: setjmp: implement coroutine dependency initjmp()
  sandbox: asm: implement setjmp/longjmp/initjmp
  x86: implement setjmp/longjmp/initjmp
  common: poller: replace explicit calls to poller_call() with resched()
  console: unconditionally run resched() in ctrlc()
  common: introduce bthreads, co-operative barebox threads
  commands: add new bthread test command
  RFC: led: migrate from poller to bthread

Sascha Hauer (6):
  riscv: Add asm/asm.h
  riscv: Add asm/linkage.h
  riscv: Implement setjmp/longjmp/initjmp for RV32I
  mips: Add linkage.h
  mips: Implement setjmp/longjmp/initjmp for 32BIT
  powerpc: Implement initjmp/setjmp/longjmp

 Documentation/devel/background-execution.rst |  37 +++-
 arch/arm/Kconfig                             |   1 +
 arch/arm/include/asm/setjmp.h                |   6 +-
 arch/arm/lib32/setjmp.S                      |   8 +
 arch/arm/lib64/setjmp.S                      |   9 +
 arch/mips/Kconfig                            |   1 +
 arch/mips/include/asm/linkage.h              |   9 +
 arch/mips/include/asm/setjmp.h               |  32 +++
 arch/mips/lib/Makefile                       |   1 +
 arch/mips/lib/setjmp.S                       |  50 +++++
 arch/powerpc/Kconfig                         |   1 +
 arch/powerpc/include/asm/setjmp.h            |  21 ++
 arch/powerpc/lib/Makefile                    |   2 +-
 arch/powerpc/lib/setjmp.S                    |  86 ++++++++
 arch/riscv/Kconfig                           |   1 +
 arch/riscv/include/asm/asm.h                 |  69 ++++++
 arch/riscv/include/asm/linkage.h             |  12 ++
 arch/riscv/include/asm/setjmp.h              |  27 +++
 arch/riscv/lib/Makefile                      |   1 +
 arch/riscv/lib/longjmp.S                     |  28 +++
 arch/riscv/lib/setjmp.S                      |  35 +++
 arch/sandbox/Kconfig                         |   1 +
 arch/sandbox/Makefile                        |   5 +-
 arch/sandbox/include/asm/setjmp.h            |  17 ++
 arch/sandbox/os/Makefile                     |   5 +-
 arch/sandbox/os/setjmp.c                     | 180 ++++++++++++++++
 arch/x86/Kconfig                             |   2 +
 arch/x86/include/asm/setjmp.h                |  44 ++++
 arch/x86/lib/Makefile                        |   3 +
 arch/x86/lib/setjmp_32.S                     |  60 ++++++
 arch/x86/lib/setjmp_64.S                     |  60 ++++++
 commands/Kconfig                             |   9 +
 commands/Makefile                            |   1 +
 commands/bthread.c                           | 195 +++++++++++++++++
 common/Kconfig                               |  13 ++
 common/Makefile                              |   1 +
 common/bthread.c                             | 214 +++++++++++++++++++
 common/clock.c                               |   4 +-
 common/console.c                             |   6 +-
 drivers/led/core.c                           |  52 ++---
 include/bthread.h                            |  53 +++++
 include/poller.h                             |   2 +
 include/sched.h                              |  15 ++
 include/slice.h                              |  17 +-
 lib/readline.c                               |   4 +-
 45 files changed, 1349 insertions(+), 51 deletions(-)
 create mode 100644 arch/mips/include/asm/linkage.h
 create mode 100644 arch/mips/include/asm/setjmp.h
 create mode 100644 arch/mips/lib/setjmp.S
 create mode 100644 arch/powerpc/include/asm/setjmp.h
 create mode 100644 arch/powerpc/lib/setjmp.S
 create mode 100644 arch/riscv/include/asm/asm.h
 create mode 100644 arch/riscv/include/asm/linkage.h
 create mode 100644 arch/riscv/include/asm/setjmp.h
 create mode 100644 arch/riscv/lib/longjmp.S
 create mode 100644 arch/riscv/lib/setjmp.S
 create mode 100644 arch/sandbox/include/asm/setjmp.h
 create mode 100644 arch/sandbox/os/setjmp.c
 create mode 100644 arch/x86/include/asm/setjmp.h
 create mode 100644 arch/x86/lib/setjmp_32.S
 create mode 100644 arch/x86/lib/setjmp_64.S
 create mode 100644 commands/bthread.c
 create mode 100644 common/bthread.c
 create mode 100644 include/bthread.h
 create mode 100644 include/sched.h

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2.29.2