Re: [PATCH v1 00/20] eznps a new ARC platform

[Vineet Gupta]

On Saturday 31 October 2015 06:45 PM, Noam Camus wrote:
> From: Noam Camus <noamc@xxxxxxxxxx>
> 
> This set introduce new platform to ARC architecture.
> Platform name called "eznps" for working with EZchip NPS400
> Network Proccessor.
> NPS400 is targeted to service "fast path" network applications.
> 
> NPS400 got mesh of 256 extended ARC cores (AKA CTOP), each core
> got 16 HW threats. 

threads - although it might as well be a thread to others doing network SoC :-)

This is basically SMT core where at any point of
> time only one HW thread is active.
> Each core have HW scheduler that round robin between eligible HW
> threads. Totaly, kernel sees 4096 CPUs which I belive is a high record.
> There is no cache coherency between cores so generic user applications
> and kernel do not use D$.
> 
> Cores got special memory mappings for huge pages (8MB).
> Mapping is static and should provide application enough memory without
> any "TLB miss". This mapping is on top of TLB mapping.
> 
> This is a basic set that will later be followed with additional
> set of patches with all advanced features.
> 
> Many thanks to all people helping to make this happen.
> 
> Regards,
> Noam Camus
> 
> Noam Camus (17):
>   Documentation: Add EZchip vendor to binding list
>   clocksource: Add NPS400 timers driver
>   irqchip: add nps Internal and external irqchips
>   ARC: Set vmalloc size from configuration
>   ARC: rwlock: disable interrupts in !LLSC variant
>   ARC: Mark cpu online only after it has executed the per cpu init
>     hook.
>   ARC: mm: use generic macros _BITUL()
>   ARC: add CONFIG_CLKSRC_OF support to time_init()
>   ARC: [plat-eznps] Add eznps board defconfig and dts
>   ARC: [plat-eznps] Add eznps platform
>   ARC: [plat-eznps] Use dedicated user stack top
>   ARC: [plat-eznps] Use dedicated bitops/atomic/cmpxchg
>   ARC: [plat-eznps] Use dedicated SMP barriers
>   ARC: [plat-eznps] Use dedicated identity auxiliary register.
>   ARC: [plat-eznps] Use dedicated COMMAND_LINE_SIZE
>   ARC: [plat-eznps] define IPI_IRQ
>   ARC: Add eznps platform to Kconfig and Makefile
> 
> Tal Zilcer (3):
>   ARC: Use res_service as entry point for secondaries
>   ARC: [plat-eznps] Use dedicated cpu_relax()
>   ARC: [plat-eznps] replace sync with proper cpu barrier
> 
>  Documentation/devicetree/bindings/arc/eznps.txt    |    7 +
>  .../interrupt-controller/ezchip,nps400-ic.txt      |   17 ++
>  .../bindings/timer/ezchip,nps400-timer.txt         |   11 +
>  .../devicetree/bindings/vendor-prefixes.txt        |    1 +
>  MAINTAINERS                                        |    6 +
>  arch/arc/Kconfig                                   |    9 +
>  arch/arc/Makefile                                  |    9 +
>  arch/arc/boot/dts/eznps.dts                        |   76 ++++++
>  arch/arc/configs/nps_defconfig                     |   85 +++++++
>  arch/arc/include/asm/atomic.h                      |   69 +++++
>  arch/arc/include/asm/barrier.h                     |    8 +
>  arch/arc/include/asm/bitops.h                      |   49 ++++
>  arch/arc/include/asm/cmpxchg.h                     |   49 ++++
>  arch/arc/include/asm/entry-compact.h               |    8 +
>  arch/arc/include/asm/irq.h                         |    4 +
>  arch/arc/include/asm/pgtable.h                     |    2 +-
>  arch/arc/include/asm/processor.h                   |   32 ++-
>  arch/arc/include/asm/setup.h                       |    4 +
>  arch/arc/include/asm/smp.h                         |    2 +-
>  arch/arc/include/asm/spinlock.h                    |   14 +
>  arch/arc/kernel/ctx_sw.c                           |   20 ++
>  arch/arc/kernel/smp.c                              |    9 +-
>  arch/arc/kernel/time.c                             |    4 +
>  arch/arc/mm/tlb.c                                  |   12 +
>  arch/arc/plat-eznps/Kconfig                        |   34 +++
>  arch/arc/plat-eznps/Makefile                       |    7 +
>  arch/arc/plat-eznps/entry.S                        |   76 ++++++
>  arch/arc/plat-eznps/include/plat/ctop.h            |  265 ++++++++++++++++++++
>  arch/arc/plat-eznps/include/plat/mtm.h             |   60 +++++
>  arch/arc/plat-eznps/include/plat/smp.h             |   27 ++
>  arch/arc/plat-eznps/mtm.c                          |  152 +++++++++++
>  arch/arc/plat-eznps/platform.c                     |   40 +++
>  arch/arc/plat-eznps/smp.c                          |  160 ++++++++++++
>  drivers/clocksource/Makefile                       |    1 +
>  drivers/clocksource/timer-nps.c                    |  103 ++++++++
>  drivers/irqchip/Makefile                           |    1 +
>  drivers/irqchip/irq-eznps.c                        |  222 ++++++++++++++++
>  37 files changed, 1644 insertions(+), 11 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arc/eznps.txt
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ezchip,nps400-ic.txt
>  create mode 100644 Documentation/devicetree/bindings/timer/ezchip,nps400-timer.txt
>  create mode 100644 arch/arc/boot/dts/eznps.dts
>  create mode 100644 arch/arc/configs/nps_defconfig
>  create mode 100644 arch/arc/plat-eznps/Kconfig
>  create mode 100644 arch/arc/plat-eznps/Makefile
>  create mode 100644 arch/arc/plat-eznps/entry.S
>  create mode 100644 arch/arc/plat-eznps/include/plat/ctop.h
>  create mode 100644 arch/arc/plat-eznps/include/plat/mtm.h
>  create mode 100644 arch/arc/plat-eznps/include/plat/smp.h
>  create mode 100644 arch/arc/plat-eznps/mtm.c
>  create mode 100644 arch/arc/plat-eznps/platform.c
>  create mode 100644 arch/arc/plat-eznps/smp.c
>  create mode 100644 drivers/clocksource/timer-nps.c
>  create mode 100644 drivers/irqchip/irq-eznps.c
> 

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