1 # SPDX-License-Identifier: GPL-2.0
3 # For a description of the syntax of this configuration file,
4 # see Documentation/kbuild/kconfig-language.rst.
7 menuconfig ARC_PLAT_EZNPS
8 bool "\"EZchip\" ARC dev platform"
10 select CLKSRC_NPS if !PHYS_ADDR_T_64BIT
12 select EZCHIP_NPS_MANAGEMENT_ENET if ETHERNET
14 Support for EZchip development platforms,
15 based on ARC700 cores.
16 We handle few flavors:
17 - Hardware Emulator AKA HE which is FPGA based chassis
18 - Simulator based on MetaWare nSIM
19 - NPS400 chip based on ASIC
22 bool "ARC-EZchip MTM Extensions"
23 select CPUMASK_OFFSTACK
24 depends on ARC_PLAT_EZNPS && SMP
27 Here we add new hierarchy for CPUs topology.
31 At the new thread level each CPU represent one HW thread.
32 At highest hierarchy each core contain 16 threads,
33 any of them seem like CPU from Linux point of view.
34 All threads within same core share the execution unit of the
35 core and HW scheduler round robin between them.
37 config EZNPS_MEM_ERROR_ALIGN
38 bool "ARC-EZchip Memory error as an exception"
39 depends on EZNPS_MTM_EXT
42 On the real chip of the NPS, user memory errors are handled
43 as a machine check exception, which is fatal, whereas on
44 simulator platform for NPS, is handled as a Level 2 interrupt
45 (just a stock ARC700) which is recoverable. This option makes
46 simulator behave like hardware.
48 config EZNPS_SHARED_AUX_REGS
49 bool "ARC-EZchip Shared Auxiliary Registers Per Core"
50 depends on ARC_PLAT_EZNPS
53 On the real chip of the NPS, auxiliary registers are shared between
54 all the cpus of the core, whereas on simulator platform for NPS,
55 each cpu has a different set of auxiliary registers. Configuration
56 should be unset if auxiliary registers are not shared between the cpus
57 of the core, so there will be a need to initialize them per cpu.