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# SPDX-License-Identifier: GPL-2.0
#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.rst.
#
menuconfig ARC_PLAT_EZNPS
bool "\"EZchip\" ARC dev platform"
select CPU_BIG_ENDIAN
select CLKSRC_NPS if !PHYS_ADDR_T_64BIT
select EZNPS_GIC
select EZCHIP_NPS_MANAGEMENT_ENET if ETHERNET
help
Support for EZchip development platforms,
based on ARC700 cores.
We handle few flavors:
- Hardware Emulator AKA HE which is FPGA based chassis
- Simulator based on MetaWare nSIM
- NPS400 chip based on ASIC
config EZNPS_MTM_EXT
bool "ARC-EZchip MTM Extensions"
select CPUMASK_OFFSTACK
depends on ARC_PLAT_EZNPS && SMP
default y
help
Here we add new hierarchy for CPUs topology.
We got:
Core
Thread
At the new thread level each CPU represent one HW thread.
At highest hierarchy each core contain 16 threads,
any of them seem like CPU from Linux point of view.
All threads within same core share the execution unit of the
core and HW scheduler round robin between them.
config EZNPS_MEM_ERROR_ALIGN
bool "ARC-EZchip Memory error as an exception"
depends on EZNPS_MTM_EXT
default n
help
On the real chip of the NPS, user memory errors are handled
as a machine check exception, which is fatal, whereas on
simulator platform for NPS, is handled as a Level 2 interrupt
(just a stock ARC700) which is recoverable. This option makes
simulator behave like hardware.
config EZNPS_SHARED_AUX_REGS
bool "ARC-EZchip Shared Auxiliary Registers Per Core"
depends on ARC_PLAT_EZNPS
default y
help
On the real chip of the NPS, auxiliary registers are shared between
all the cpus of the core, whereas on simulator platform for NPS,
each cpu has a different set of auxiliary registers. Configuration
should be unset if auxiliary registers are not shared between the cpus
of the core, so there will be a need to initialize them per cpu.
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