mbox series

[00/31] Andes(nds32) Linux Kernel Port

Message ID cover.1510118606.git.green.hu@gmail.com
Headers show
Series Andes(nds32) Linux Kernel Port | expand

Message

Greentime Hu Nov. 8, 2017, 5:54 a.m. UTC 
This patchset adds core architecture support to Linux for Andestech's
N13, N15, D15, N10, D10 processor cores.

Based on the 16/32-bit AndeStar RISC-like architecture, we designed the
configurable AndesCore series of embedded processor families. AndesCores
range from highly performance-efficient small-footprint cores for
microcontrollers and deeply-embedded applications to 1GHz+ cores running
Linux, covering general-purpose N-series cores for a wide range of computing
need, DSP-capable D-series cores for digital signal control,
instruction-extensible E-series cores for application-specific acceleration,
and secure S-series cores for best protection of the most valuable.

The patches are based on v4.14-rc8, and can also be found in the
following git tree:
  https://github.com/andestech/linux.git nds32-4.14-rc8

The build script and toolchain repositories are able to be found here:
  https://github.com/andestech/build_script.git

Freely available instruction set and architecture overview documents can
be found on the following page:
  http://www.andestech.com/product.php?cls=9


Vincent Ren-Wei Chen and I will maintain this port. Thanks to everyone who
helped us and contributed to it. :) Any feedback is welcome.

Greentime Hu (31):
  nds32: Assembly macros and definitions
  nds32: Kernel booting and initialization
  nds32: Support early_printk
  nds32: Exception handling
  nds32: MMU definitions
  nds32: MMU initialization
  nds32: MMU fault handling and page table management
  nds32: Cache and TLB routines
  nds32: Process management
  nds32: IRQ handling
  nds32: Atomic operations
  nds32: Device specific operations
  nds32: DMA mapping API
  nds32: ELF definitions
  nds32: System calls handling
  nds32: VDSO support
  nds32: Signal handling support
  nds32: Library functions
  nds32: Debugging support
  nds32: L2 cache support
  nds32: Loadable modules
  nds32: Generic timers support
  nds32: Device tree support
  nds32: Miscellaneous header files
  nds32: defconfig
  nds32: Build infrastructure
  dt-bindings: interrupt-controller: Andestech Internal Vector
    Interrupt Controller
  irqchip: Andestech Internal Vector Interrupt Controller driver
  MAINTAINERS: Add nds32
  dt-bindings: nds32 CPU Bindings
  net: faraday add nds32 support.

 .../interrupt-controller/andestech,ativic32.txt    |   27 +
 Documentation/devicetree/bindings/nds32/cpus.txt   |   33 +
 MAINTAINERS                                        |    9 +
 arch/nds32/Kconfig                                 |  107 +++
 arch/nds32/Kconfig.cpu                             |  100 ++
 arch/nds32/Kconfig.debug                           |   14 +
 arch/nds32/Makefile                                |   60 ++
 arch/nds32/boot/Makefile                           |   15 +
 arch/nds32/boot/dts/Makefile                       |    8 +
 arch/nds32/boot/dts/ae3xx.dts                      |   55 ++
 arch/nds32/boot/dts/ag101p.dts                     |   60 ++
 arch/nds32/configs/ae3xx_defconfig                 |  110 +++
 arch/nds32/configs/ag101p_defconfig                |  109 +++
 arch/nds32/include/asm/Kbuild                      |   54 ++
 arch/nds32/include/asm/assembler.h                 |   52 ++
 arch/nds32/include/asm/bitfield.h                  |  982 ++++++++++++++++++++
 arch/nds32/include/asm/cache.h                     |   25 +
 arch/nds32/include/asm/cache_info.h                |   26 +
 arch/nds32/include/asm/cacheflush.h                |   57 ++
 arch/nds32/include/asm/current.h                   |   25 +
 arch/nds32/include/asm/delay.h                     |   51 +
 arch/nds32/include/asm/dma-mapping.h               |   27 +
 arch/nds32/include/asm/elf.h                       |  192 ++++
 arch/nds32/include/asm/fixmap.h                    |   41 +
 arch/nds32/include/asm/futex.h                     |  116 +++
 arch/nds32/include/asm/highmem.h                   |   78 ++
 arch/nds32/include/asm/io.h                        |   33 +
 arch/nds32/include/asm/irqflags.h                  |   49 +
 arch/nds32/include/asm/l2_cache.h                  |  158 ++++
 arch/nds32/include/asm/linkage.h                   |   24 +
 arch/nds32/include/asm/memory.h                    |  147 +++
 arch/nds32/include/asm/mmu.h                       |   25 +
 arch/nds32/include/asm/mmu_context.h               |   81 ++
 arch/nds32/include/asm/module.h                    |   24 +
 arch/nds32/include/asm/nds32.h                     |   92 ++
 arch/nds32/include/asm/page.h                      |   78 ++
 arch/nds32/include/asm/pgalloc.h                   |  109 +++
 arch/nds32/include/asm/pgtable.h                   |  426 +++++++++
 arch/nds32/include/asm/proc-fns.h                  |   94 ++
 arch/nds32/include/asm/processor.h                 |  116 +++
 arch/nds32/include/asm/ptrace.h                    |   79 ++
 arch/nds32/include/asm/shmparam.h                  |   33 +
 arch/nds32/include/asm/spinlock.h                  |  178 ++++
 arch/nds32/include/asm/string.h                    |   30 +
 arch/nds32/include/asm/swab.h                      |   48 +
 arch/nds32/include/asm/syscall.h                   |  203 ++++
 arch/nds32/include/asm/syscalls.h                  |   27 +
 arch/nds32/include/asm/thread_info.h               |   91 ++
 arch/nds32/include/asm/tlb.h                       |   41 +
 arch/nds32/include/asm/tlbflush.h                  |   60 ++
 arch/nds32/include/asm/uaccess.h                   |  385 ++++++++
 arch/nds32/include/asm/unistd.h                    |   21 +
 arch/nds32/include/asm/vdso.h                      |   35 +
 arch/nds32/include/asm/vdso_datapage.h             |   51 +
 arch/nds32/include/uapi/asm/Kbuild                 |   26 +
 arch/nds32/include/uapi/asm/auxvec.h               |   25 +
 arch/nds32/include/uapi/asm/byteorder.h            |   26 +
 arch/nds32/include/uapi/asm/cachectl.h             |   19 +
 arch/nds32/include/uapi/asm/param.h                |   24 +
 arch/nds32/include/uapi/asm/posix_types.h          |   41 +
 arch/nds32/include/uapi/asm/ptrace.h               |   42 +
 arch/nds32/include/uapi/asm/sigcontext.h           |   73 ++
 arch/nds32/include/uapi/asm/signal.h               |   23 +
 arch/nds32/include/uapi/asm/unistd.h               |   36 +
 arch/nds32/kernel/Makefile                         |   24 +
 arch/nds32/kernel/asm-offsets.c                    |   40 +
 arch/nds32/kernel/atl2c.c                          |   77 ++
 arch/nds32/kernel/cacheinfo.c                      |   62 ++
 arch/nds32/kernel/devtree.c                        |   45 +
 arch/nds32/kernel/dma.c                            |  478 ++++++++++
 arch/nds32/kernel/early_printk.c                   |  124 +++
 arch/nds32/kernel/ex-entry.S                       |  169 ++++
 arch/nds32/kernel/ex-exit.S                        |  207 +++++
 arch/nds32/kernel/ex-scall.S                       |  146 +++
 arch/nds32/kernel/head.S                           |  211 +++++
 arch/nds32/kernel/irq.c                            |   34 +
 arch/nds32/kernel/module.c                         |  299 ++++++
 arch/nds32/kernel/nds32_ksyms.c                    |   54 ++
 arch/nds32/kernel/process.c                        |  219 +++++
 arch/nds32/kernel/ptrace.c                         |  325 +++++++
 arch/nds32/kernel/setup.c                          |  406 ++++++++
 arch/nds32/kernel/signal.c                         |  370 ++++++++
 arch/nds32/kernel/stacktrace.c                     |   60 ++
 arch/nds32/kernel/sys_nds32.c                      |   63 ++
 arch/nds32/kernel/syscall_table.c                  |   28 +
 arch/nds32/kernel/time.c                           |   22 +
 arch/nds32/kernel/traps.c                          |  442 +++++++++
 arch/nds32/kernel/vdso.c                           |  243 +++++
 arch/nds32/kernel/vdso/Makefile                    |   82 ++
 arch/nds32/kernel/vdso/datapage.S                  |   34 +
 arch/nds32/kernel/vdso/gen_vdso_offsets.sh         |   15 +
 arch/nds32/kernel/vdso/gettimeofday.c              |  260 ++++++
 arch/nds32/kernel/vdso/note.S                      |   29 +
 arch/nds32/kernel/vdso/sigreturn.S                 |   32 +
 arch/nds32/kernel/vdso/vdso.S                      |   33 +
 arch/nds32/kernel/vdso/vdso.lds.S                  |   87 ++
 arch/nds32/kernel/vmlinux.lds.S                    |   70 ++
 arch/nds32/lib/Makefile                            |    4 +
 arch/nds32/lib/copy_page.S                         |   50 +
 arch/nds32/lib/getuser.S                           |   57 ++
 arch/nds32/lib/memcpy.S                            |   93 ++
 arch/nds32/lib/memmove.S                           |   83 ++
 arch/nds32/lib/memset.S                            |   46 +
 arch/nds32/lib/memzero.S                           |   31 +
 arch/nds32/lib/putuser.S                           |   53 ++
 arch/nds32/lib/uaccess.S                           |  160 ++++
 arch/nds32/mm/Makefile                             |    7 +
 arch/nds32/mm/alignment.c                          |  564 +++++++++++
 arch/nds32/mm/cacheflush.c                         |  331 +++++++
 arch/nds32/mm/extable.c                            |   29 +
 arch/nds32/mm/fault.c                              |  420 +++++++++
 arch/nds32/mm/highmem.c                            |   92 ++
 arch/nds32/mm/init.c                               |  328 +++++++
 arch/nds32/mm/ioremap.c                            |   67 ++
 arch/nds32/mm/mm-nds32.c                           |  103 ++
 arch/nds32/mm/mmap.c                               |   88 ++
 arch/nds32/mm/proc-n13.c                           |  608 ++++++++++++
 arch/nds32/mm/tlb.c                                |   63 ++
 drivers/irqchip/Makefile                           |    1 +
 drivers/irqchip/irq-ativic32.c                     |  149 +++
 drivers/net/ethernet/faraday/Kconfig               |    6 +-
 121 files changed, 13726 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/andestech,ativic32.txt
 create mode 100644 Documentation/devicetree/bindings/nds32/cpus.txt
 create mode 100644 arch/nds32/Kconfig
 create mode 100644 arch/nds32/Kconfig.cpu
 create mode 100644 arch/nds32/Kconfig.debug
 create mode 100644 arch/nds32/Makefile
 create mode 100644 arch/nds32/boot/Makefile
 create mode 100644 arch/nds32/boot/dts/Makefile
 create mode 100644 arch/nds32/boot/dts/ae3xx.dts
 create mode 100644 arch/nds32/boot/dts/ag101p.dts
 create mode 100644 arch/nds32/configs/ae3xx_defconfig
 create mode 100644 arch/nds32/configs/ag101p_defconfig
 create mode 100644 arch/nds32/include/asm/Kbuild
 create mode 100644 arch/nds32/include/asm/assembler.h
 create mode 100644 arch/nds32/include/asm/bitfield.h
 create mode 100644 arch/nds32/include/asm/cache.h
 create mode 100644 arch/nds32/include/asm/cache_info.h
 create mode 100644 arch/nds32/include/asm/cacheflush.h
 create mode 100644 arch/nds32/include/asm/current.h
 create mode 100644 arch/nds32/include/asm/delay.h
 create mode 100644 arch/nds32/include/asm/dma-mapping.h
 create mode 100644 arch/nds32/include/asm/elf.h
 create mode 100644 arch/nds32/include/asm/fixmap.h
 create mode 100644 arch/nds32/include/asm/futex.h
 create mode 100644 arch/nds32/include/asm/highmem.h
 create mode 100644 arch/nds32/include/asm/io.h
 create mode 100644 arch/nds32/include/asm/irqflags.h
 create mode 100644 arch/nds32/include/asm/l2_cache.h
 create mode 100644 arch/nds32/include/asm/linkage.h
 create mode 100644 arch/nds32/include/asm/memory.h
 create mode 100644 arch/nds32/include/asm/mmu.h
 create mode 100644 arch/nds32/include/asm/mmu_context.h
 create mode 100644 arch/nds32/include/asm/module.h
 create mode 100644 arch/nds32/include/asm/nds32.h
 create mode 100644 arch/nds32/include/asm/page.h
 create mode 100644 arch/nds32/include/asm/pgalloc.h
 create mode 100644 arch/nds32/include/asm/pgtable.h
 create mode 100644 arch/nds32/include/asm/proc-fns.h
 create mode 100644 arch/nds32/include/asm/processor.h
 create mode 100644 arch/nds32/include/asm/ptrace.h
 create mode 100644 arch/nds32/include/asm/shmparam.h
 create mode 100644 arch/nds32/include/asm/spinlock.h
 create mode 100644 arch/nds32/include/asm/string.h
 create mode 100644 arch/nds32/include/asm/swab.h
 create mode 100644 arch/nds32/include/asm/syscall.h
 create mode 100644 arch/nds32/include/asm/syscalls.h
 create mode 100644 arch/nds32/include/asm/thread_info.h
 create mode 100644 arch/nds32/include/asm/tlb.h
 create mode 100644 arch/nds32/include/asm/tlbflush.h
 create mode 100644 arch/nds32/include/asm/uaccess.h
 create mode 100644 arch/nds32/include/asm/unistd.h
 create mode 100644 arch/nds32/include/asm/vdso.h
 create mode 100644 arch/nds32/include/asm/vdso_datapage.h
 create mode 100644 arch/nds32/include/uapi/asm/Kbuild
 create mode 100644 arch/nds32/include/uapi/asm/auxvec.h
 create mode 100644 arch/nds32/include/uapi/asm/byteorder.h
 create mode 100644 arch/nds32/include/uapi/asm/cachectl.h
 create mode 100644 arch/nds32/include/uapi/asm/param.h
 create mode 100644 arch/nds32/include/uapi/asm/posix_types.h
 create mode 100644 arch/nds32/include/uapi/asm/ptrace.h
 create mode 100644 arch/nds32/include/uapi/asm/sigcontext.h
 create mode 100644 arch/nds32/include/uapi/asm/signal.h
 create mode 100644 arch/nds32/include/uapi/asm/unistd.h
 create mode 100644 arch/nds32/kernel/Makefile
 create mode 100644 arch/nds32/kernel/asm-offsets.c
 create mode 100644 arch/nds32/kernel/atl2c.c
 create mode 100644 arch/nds32/kernel/cacheinfo.c
 create mode 100644 arch/nds32/kernel/devtree.c
 create mode 100644 arch/nds32/kernel/dma.c
 create mode 100644 arch/nds32/kernel/early_printk.c
 create mode 100644 arch/nds32/kernel/ex-entry.S
 create mode 100644 arch/nds32/kernel/ex-exit.S
 create mode 100644 arch/nds32/kernel/ex-scall.S
 create mode 100644 arch/nds32/kernel/head.S
 create mode 100644 arch/nds32/kernel/irq.c
 create mode 100644 arch/nds32/kernel/module.c
 create mode 100644 arch/nds32/kernel/nds32_ksyms.c
 create mode 100644 arch/nds32/kernel/process.c
 create mode 100644 arch/nds32/kernel/ptrace.c
 create mode 100644 arch/nds32/kernel/setup.c
 create mode 100644 arch/nds32/kernel/signal.c
 create mode 100644 arch/nds32/kernel/stacktrace.c
 create mode 100644 arch/nds32/kernel/sys_nds32.c
 create mode 100644 arch/nds32/kernel/syscall_table.c
 create mode 100644 arch/nds32/kernel/time.c
 create mode 100644 arch/nds32/kernel/traps.c
 create mode 100644 arch/nds32/kernel/vdso.c
 create mode 100644 arch/nds32/kernel/vdso/Makefile
 create mode 100644 arch/nds32/kernel/vdso/datapage.S
 create mode 100755 arch/nds32/kernel/vdso/gen_vdso_offsets.sh
 create mode 100644 arch/nds32/kernel/vdso/gettimeofday.c
 create mode 100644 arch/nds32/kernel/vdso/note.S
 create mode 100644 arch/nds32/kernel/vdso/sigreturn.S
 create mode 100644 arch/nds32/kernel/vdso/vdso.S
 create mode 100644 arch/nds32/kernel/vdso/vdso.lds.S
 create mode 100644 arch/nds32/kernel/vmlinux.lds.S
 create mode 100644 arch/nds32/lib/Makefile
 create mode 100644 arch/nds32/lib/copy_page.S
 create mode 100644 arch/nds32/lib/getuser.S
 create mode 100644 arch/nds32/lib/memcpy.S
 create mode 100644 arch/nds32/lib/memmove.S
 create mode 100644 arch/nds32/lib/memset.S
 create mode 100644 arch/nds32/lib/memzero.S
 create mode 100644 arch/nds32/lib/putuser.S
 create mode 100644 arch/nds32/lib/uaccess.S
 create mode 100644 arch/nds32/mm/Makefile
 create mode 100644 arch/nds32/mm/alignment.c
 create mode 100644 arch/nds32/mm/cacheflush.c
 create mode 100644 arch/nds32/mm/extable.c
 create mode 100644 arch/nds32/mm/fault.c
 create mode 100644 arch/nds32/mm/highmem.c
 create mode 100644 arch/nds32/mm/init.c
 create mode 100644 arch/nds32/mm/ioremap.c
 create mode 100644 arch/nds32/mm/mm-nds32.c
 create mode 100644 arch/nds32/mm/mmap.c
 create mode 100644 arch/nds32/mm/proc-n13.c
 create mode 100644 arch/nds32/mm/tlb.c
 create mode 100644 drivers/irqchip/irq-ativic32.c

Comments

David Howells Nov. 8, 2017, 8:32 a.m. UTC | #1 
Greentime Hu <green.hu@gmail.com> wrote:

> The build script and toolchain repositories are able to be found here:
>   https://github.com/andestech/build_script.git

Is arch support in upstream binutils and gcc?

David
Greentime Hu Nov. 8, 2017, 8:41 a.m. UTC | #2 
2017-11-08 16:32 GMT+08:00 David Howells <dhowells@redhat.com>:
> Greentime Hu <green.hu@gmail.com> wrote:
>
>> The build script and toolchain repositories are able to be found here:
>>   https://github.com/andestech/build_script.git
>
> Is arch support in upstream binutils and gcc?

Yes, it is but only supporting elf-toolchain now. We will do the
upstream for Linux-toolchain in the next step.
Arnd Bergmann Nov. 8, 2017, 10:18 a.m. UTC | #3 
On Wed, Nov 8, 2017 at 9:41 AM, Greentime Hu <green.hu@gmail.com> wrote:
> 2017-11-08 16:32 GMT+08:00 David Howells <dhowells@redhat.com>:
>> Greentime Hu <green.hu@gmail.com> wrote:
>>
>>> The build script and toolchain repositories are able to be found here:
>>>   https://github.com/andestech/build_script.git
>>
>> Is arch support in upstream binutils and gcc?
>
> Yes, it is but only supporting elf-toolchain now. We will do the
> upstream for Linux-toolchain in the next step.

Is the Linux toolchain only required for building user space, or do
you also need it
for building kernels? It's often possible to build kernels with a bare
toolchain, and
that helps a lot for automated testing.

      Arnd
Arnd Bergmann Nov. 8, 2017, 10:26 a.m. UTC | #4 
On Wed, Nov 8, 2017 at 6:54 AM, Greentime Hu <green.hu@gmail.com> wrote:
> This patchset adds core architecture support to Linux for Andestech's
> N13, N15, D15, N10, D10 processor cores.
>
> Based on the 16/32-bit AndeStar RISC-like architecture, we designed the
> configurable AndesCore series of embedded processor families. AndesCores
> range from highly performance-efficient small-footprint cores for
> microcontrollers and deeply-embedded applications to 1GHz+ cores running
> Linux, covering general-purpose N-series cores for a wide range of computing
> need, DSP-capable D-series cores for digital signal control,
> instruction-extensible E-series cores for application-specific acceleration,
> and secure S-series cores for best protection of the most valuable.

I looked at the entire patch series now and commented on anything I noticed
that could be improved, overall this looks very nice, great work!

Most of my comments are about tiny details that are easy to address.

I see two areas that need to be looked at carefully, and that may take a
few more rounds to get right:

- In the user space ABI, you have a couple of things that differ from the
  normal asm-generic definitions, i.e. s few syscall entry points and some
  types in asm/posix-types.h. I guess you did that to remain compatible
  with an older glibc port, but IMHO this compatibility should be broken
  in favor of having the standard ABI before the port gets merged.

- For the boot interface, you need to clearly define what can be expected
  and what cannot. This involves the presence of the l2cc, the physical
  memory address, the built-in dtb, and probably a few more things I
  missed. For long-term maintainability, you probably want to ensure that
  you can build a kernel that runs on as much diverse hardware as possible.

       Arnd
Greentime Hu Nov. 9, 2017, 9:26 a.m. UTC | #5 
2017-11-08 18:18 GMT+08:00 Arnd Bergmann <arnd@arndb.de>:
> On Wed, Nov 8, 2017 at 9:41 AM, Greentime Hu <green.hu@gmail.com> wrote:
>> 2017-11-08 16:32 GMT+08:00 David Howells <dhowells@redhat.com>:
>>> Greentime Hu <green.hu@gmail.com> wrote:
>>>
>>>> The build script and toolchain repositories are able to be found here:
>>>>   https://github.com/andestech/build_script.git
>>>
>>> Is arch support in upstream binutils and gcc?
>>
>> Yes, it is but only supporting elf-toolchain now. We will do the
>> upstream for Linux-toolchain in the next step.
>
> Is the Linux toolchain only required for building user space, or do
> you also need it
> for building kernels? It's often possible to build kernels with a bare
> toolchain, and
> that helps a lot for automated testing.

Yes, nds32 kernel is able to be built with elf-toolchain too.
Greentime Hu Nov. 9, 2017, 9:33 a.m. UTC | #6 
2017-11-08 18:26 GMT+08:00 Arnd Bergmann <arnd@arndb.de>:
> On Wed, Nov 8, 2017 at 6:54 AM, Greentime Hu <green.hu@gmail.com> wrote:
>> This patchset adds core architecture support to Linux for Andestech's
>> N13, N15, D15, N10, D10 processor cores.
>>
>> Based on the 16/32-bit AndeStar RISC-like architecture, we designed the
>> configurable AndesCore series of embedded processor families. AndesCores
>> range from highly performance-efficient small-footprint cores for
>> microcontrollers and deeply-embedded applications to 1GHz+ cores running
>> Linux, covering general-purpose N-series cores for a wide range of computing
>> need, DSP-capable D-series cores for digital signal control,
>> instruction-extensible E-series cores for application-specific acceleration,
>> and secure S-series cores for best protection of the most valuable.
>
> I looked at the entire patch series now and commented on anything I noticed
> that could be improved, overall this looks very nice, great work!
>
> Most of my comments are about tiny details that are easy to address.
>
> I see two areas that need to be looked at carefully, and that may take a
> few more rounds to get right:
>
> - In the user space ABI, you have a couple of things that differ from the
>   normal asm-generic definitions, i.e. s few syscall entry points and some
>   types in asm/posix-types.h. I guess you did that to remain compatible
>   with an older glibc port, but IMHO this compatibility should be broken
>   in favor of having the standard ABI before the port gets merged.
>
> - For the boot interface, you need to clearly define what can be expected
>   and what cannot. This involves the presence of the l2cc, the physical
>   memory address, the built-in dtb, and probably a few more things I
>   missed. For long-term maintainability, you probably want to ensure that
>   you can build a kernel that runs on as much diverse hardware as possible.
>

Many thanks to all your feedbacks. We will prepare the V2 patch to fix
them ASAP. :)