2 # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 # This program is free software; you can redistribute it and/or modify
5 # it under the terms of the GNU General Public License version 2 as
6 # published by the Free Software Foundation.
12 select ARCH_HAS_SG_CHAIN
13 select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
14 select BUILDTIME_EXTABLE_SORT
15 select CLONE_BACKWARDS
17 select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
18 select GENERIC_CLOCKEVENTS
19 select GENERIC_FIND_FIRST_BIT
20 # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
21 select GENERIC_IRQ_SHOW
22 select GENERIC_PCI_IOMAP
23 select GENERIC_PENDING_IRQ if SMP
24 select GENERIC_SMP_IDLE_THREAD
26 select HAVE_ARCH_TRACEHOOK
27 select HAVE_FUTEX_CMPXCHG
28 select HAVE_IOREMAP_PROT
30 select HAVE_KRETPROBES
32 select HAVE_MOD_ARCH_SPECIFIC
34 select HAVE_PERF_EVENTS
35 select HANDLE_DOMAIN_IRQ
37 select MODULES_USE_ELF_RELA
40 select OF_EARLY_FLATTREE
41 select OF_RESERVED_MEM
42 select PERF_USE_VMALLOC
43 select HAVE_DEBUG_STACKOVERFLOW
44 select HAVE_GENERIC_DMA_COHERENT
45 select HAVE_KERNEL_GZIP
46 select HAVE_KERNEL_LZMA
51 config TRACE_IRQFLAGS_SUPPORT
54 config LOCKDEP_SUPPORT
57 config SCHED_OMIT_FRAME_POINTER
63 config RWSEM_GENERIC_SPINLOCK
66 config ARCH_DISCONTIGMEM_ENABLE
69 config ARCH_FLATMEM_ENABLE
78 config GENERIC_CALIBRATE_DELAY
81 config GENERIC_HWEIGHT
84 config STACKTRACE_SUPPORT
88 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
93 source "kernel/Kconfig.freezer"
95 menu "ARC Architecture Configuration"
97 menu "ARC Platform/SoC/Board"
99 source "arch/arc/plat-tb10x/Kconfig"
100 source "arch/arc/plat-axs10x/Kconfig"
101 #New platform adds here
102 source "arch/arc/plat-eznps/Kconfig"
107 prompt "ARC Instruction Set"
108 default ISA_ARCOMPACT
112 select CPU_NO_EFFICIENT_FFS
114 The original ARC ISA of ARC600/700 cores
118 select ARC_TIMERS_64BIT
120 ISA for the Next Generation ARC-HS cores
124 menu "ARC CPU Configuration"
128 default ARC_CPU_770 if ISA_ARCOMPACT
129 default ARC_CPU_HS if ISA_ARCV2
137 Support for ARC750 core
143 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
144 This core has a bunch of cool new features:
145 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
146 Shared Address Spaces (for sharing TLB entires in MMU)
147 -Caches: New Prog Model, Region Flush
148 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
156 Support for ARC HS38x Cores based on ARCv2 ISA
157 The notable features are:
158 - SMP configurations of upto 4 core with coherency
159 - Optional L2 Cache and IO-Coherency
160 - Revised Interrupt Architecture (multiple priorites, reg banks,
161 auto stack switch, auto regfile save/restore)
162 - MMUv4 (PIPT dcache, Huge Pages)
164 * 64bit load/store: LDD, STD
165 * Hardware assisted divide/remainder: DIV, REM
166 * Function prologue/epilogue: ENTER_S, LEAVE_S
167 * IRQ enable/disable: CLRI, SETI
168 * pop count: FFS, FLS
169 * SETcc, BMSKN, XBFU...
173 config CPU_BIG_ENDIAN
174 bool "Enable Big Endian Mode"
177 Build kernel for Big Endian Mode of ARC CPU
180 bool "Symmetric Multi-Processing"
182 select ARC_MCIP if ISA_ARCV2
184 This enables support for systems with more than one CPU.
189 int "Maximum number of CPUs (2-4096)"
193 config ARC_SMP_HALT_ON_RESET
194 bool "Enable Halt-on-reset boot mode"
195 default y if ARC_UBOOT_SUPPORT
197 In SMP configuration cores can be configured as Halt-on-reset
198 or they could all start at same time. For Halt-on-reset, non
199 masters are parked until Master kicks them so they can start of
200 at designated entry point. For other case, all jump to common
201 entry point and spin wait for Master's signal.
206 bool "ARConnect Multicore IP (MCIP) Support "
210 This IP block enables SMP in ARC-HS38 cores.
211 It provides for cross-core interrupts, multi-core debug
212 hardware semaphores, shared memory,....
215 bool "Enable Cache Support"
220 config ARC_CACHE_LINE_SHIFT
221 int "Cache Line Length (as power of 2)"
225 Starting with ARC700 4.9, Cache line length is configurable,
226 This option specifies "N", with Line-len = 2 power N
227 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
228 Linux only supports same line lengths for I and D caches.
230 config ARC_HAS_ICACHE
231 bool "Use Instruction Cache"
234 config ARC_HAS_DCACHE
235 bool "Use Data Cache"
238 config ARC_CACHE_PAGES
239 bool "Per Page Cache Control"
241 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
243 This can be used to over-ride the global I/D Cache Enable on a
244 per-page basis (but only for pages accessed via MMU such as
245 Kernel Virtual address or User Virtual Address)
246 TLB entries have a per-page Cache Enable Bit.
247 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
248 Global DISABLE + Per Page ENABLE won't work
250 config ARC_CACHE_VIPT_ALIASING
251 bool "Support VIPT Aliasing D$"
252 depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
260 Single Cycle RAMS to store Fast Path Code
264 int "ICCM Size in KB"
266 depends on ARC_HAS_ICCM
271 Single Cycle RAMS to store Fast Path Data
275 int "DCCM Size in KB"
277 depends on ARC_HAS_DCCM
280 hex "DCCM map address"
282 depends on ARC_HAS_DCCM
286 default ARC_MMU_V3 if ARC_CPU_770
287 default ARC_MMU_V2 if ARC_CPU_750D
288 default ARC_MMU_V4 if ARC_CPU_HS
300 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
301 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
305 depends on ARC_CPU_770
307 Introduced with ARC700 4.10: New Features
308 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
309 Shared Address Spaces (SASID)
321 prompt "MMU Page Size"
322 default ARC_PAGE_SIZE_8K
324 config ARC_PAGE_SIZE_8K
327 Choose between 8k vs 16k
329 config ARC_PAGE_SIZE_16K
331 depends on ARC_MMU_V3 || ARC_MMU_V4
333 config ARC_PAGE_SIZE_4K
335 depends on ARC_MMU_V3 || ARC_MMU_V4
340 prompt "MMU Super Page Size"
341 depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
342 default ARC_HUGEPAGE_2M
344 config ARC_HUGEPAGE_2M
347 config ARC_HUGEPAGE_16M
353 int "Maximum NUMA Nodes (as a power of 2)"
354 default "0" if !DISCONTIGMEM
355 default "1" if DISCONTIGMEM
356 depends on NEED_MULTIPLE_NODES
358 Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
363 config ARC_COMPACT_IRQ_LEVELS
364 bool "Setup Timer IRQ as high Priority"
366 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
369 config ARC_FPU_SAVE_RESTORE
370 bool "Enable FPU state persistence across context switch"
373 Double Precision Floating Point unit had dedictaed regs which
374 need to be saved/restored across context-switch.
375 Note that ARC FPU is overly simplistic, unlike say x86, which has
376 hardware pieces to allow software to conditionally save/restore,
377 based on actual usage of FPU by a task. Thus our implemn does
378 this for all tasks in system.
386 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
388 depends on !ARC_CANT_LLSC
391 bool "Insn: SWAPE (endian-swap)"
397 bool "Insn: 64bit LDD/STD"
399 Enable gcc to generate 64-bit load/store instructions
400 ISA mandates even/odd registers to allow encoding of two
401 dest operands with 2 possible source operands.
404 config ARC_HAS_DIV_REM
405 bool "Insn: div, divu, rem, remu"
408 config ARC_HAS_ACCL_REGS
409 bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
412 Depending on the configuration, CPU can contain accumulator reg-pair
413 (also referred to as r58:r59). These can also be used by gcc as GPR so
414 kernel needs to save/restore per process
418 endmenu # "ARC CPU Configuration"
420 config LINUX_LINK_BASE
421 hex "Linux Link Address"
424 ARC700 divides the 32 bit phy address space into two equal halves
425 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
426 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
427 Typically Linux kernel is linked at the start of untransalted addr,
428 hence the default value of 0x8zs.
429 However some customers have peripherals mapped at this addr, so
430 Linux needs to be scooted a bit.
431 If you don't know what the above means, leave this setting alone.
432 This needs to match memory start address specified in Device Tree
435 bool "High Memory Support"
436 select ARCH_DISCONTIGMEM_ENABLE
438 With ARC 2G:2G address split, only upper 2G is directly addressable by
439 kernel. Enable this to potentially allow access to rest of 2G and PAE
443 bool "Support for the 40-bit Physical Address Extension"
448 Enable access to physical memory beyond 4G, only supported on
449 ARC cores with 40 bit Physical Addressing support
451 config ARCH_PHYS_ADDR_T_64BIT
452 def_bool ARC_HAS_PAE40
454 config ARCH_DMA_ADDR_T_64BIT
457 config ARC_PLAT_NEEDS_PHYS_TO_DMA
460 config ARC_KVADDR_SIZE
461 int "Kernel Virtaul Address Space size (MB)"
465 The kernel address space is carved out of 256MB of translated address
466 space for catering to vmalloc, modules, pkmap, fixmap. This however may
467 not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
468 this to be stretched to 512 MB (by extending into the reserved
471 config ARC_CURR_IN_REG
472 bool "Dedicate Register r25 for current_task pointer"
475 This reserved Register R25 to point to Current Task in
476 kernel mode. This saves memory access for each such access
479 config ARC_EMUL_UNALIGNED
480 bool "Emulate unaligned memory access (userspace only)"
482 select SYSCTL_ARCH_UNALIGN_NO_WARN
483 select SYSCTL_ARCH_UNALIGN_ALLOW
484 depends on ISA_ARCOMPACT
486 This enables misaligned 16 & 32 bit memory access from user space.
487 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
488 potential bugs in code
491 int "Timer Frequency"
494 config ARC_METAWARE_HLINK
495 bool "Support for Metaware debugger assisted Host access"
498 This options allows a Linux userland apps to directly access
499 host file system (open/creat/read/write etc) with help from
500 Metaware Debugger. This can come in handy for Linux-host communication
501 when there is no real usable peripheral such as EMAC.
509 config ARC_DW2_UNWIND
510 bool "Enable DWARF specific kernel stack unwind"
514 Compiles the kernel with DWARF unwind information and can be used
515 to get stack backtraces.
517 If you say Y here the resulting kernel image will be slightly larger
518 but not slower, and it will give very useful debugging information.
519 If you don't debug the kernel, you can say N, but we may not be able
520 to solve problems without frame unwind information
522 config ARC_DBG_TLB_PARANOIA
523 bool "Paranoia Checks in Low Level TLB Handlers"
528 config ARC_UBOOT_SUPPORT
529 bool "Support uboot arg Handling"
532 ARC Linux by default checks for uboot provided args as pointers to
533 external cmdline or DTB. This however breaks in absence of uboot,
534 when booting from Metaware debugger directly, as the registers are
535 not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
536 registers look like uboot args to kernel which then chokes.
537 So only enable the uboot arg checking/processing if users are sure
538 of uboot being in play.
540 config ARC_BUILTIN_DTB_NAME
541 string "Built in DTB"
543 Set the name of the DTB to embed in the vmlinux binary
544 Leaving it blank selects the minimal "skeleton" dtb
546 source "kernel/Kconfig.preempt"
548 menu "Executable file formats"
549 source "fs/Kconfig.binfmt"
552 endmenu # "ARC Architecture Configuration"
556 config FORCE_MAX_ZONEORDER
557 int "Maximum zone order"
558 default "12" if ARC_HUGEPAGE_16M
562 source "drivers/Kconfig"
567 bool "PCI support" if MIGHT_HAVE_PCI
569 PCI is the name of a bus system, i.e., the way the CPU talks to
570 the other stuff inside your box. Find out if your board/platform
573 Note: PCIe support for Synopsys Device will be available only
574 when HAPS DX is configured with PCIe RC bitmap. If you have PCI,
580 source "drivers/pci/Kconfig"
585 source "arch/arc/Kconfig.debug"
586 source "security/Kconfig"
587 source "crypto/Kconfig"
589 source "kernel/power/Kconfig"