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_SYNC_DMA_FOR_CPU
13 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
14 select ARCH_HAS_SG_CHAIN
15 select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
16 select BUILDTIME_EXTABLE_SORT
17 select CLONE_BACKWARDS
19 select DMA_NONCOHERENT_OPS
20 select DMA_NONCOHERENT_MMAP
21 select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
22 select GENERIC_CLOCKEVENTS
23 select GENERIC_FIND_FIRST_BIT
24 # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
25 select GENERIC_IRQ_SHOW
26 select GENERIC_PCI_IOMAP
27 select GENERIC_PENDING_IRQ if SMP
28 select GENERIC_SMP_IDLE_THREAD
30 select HAVE_ARCH_TRACEHOOK
31 select HAVE_FUTEX_CMPXCHG if FUTEX
32 select HAVE_IOREMAP_PROT
34 select HAVE_KRETPROBES
36 select HAVE_MOD_ARCH_SPECIFIC
38 select HAVE_PERF_EVENTS
39 select HANDLE_DOMAIN_IRQ
41 select MODULES_USE_ELF_RELA
44 select OF_EARLY_FLATTREE
45 select OF_RESERVED_MEM
46 select PERF_USE_VMALLOC if ARC_CACHE_VIPT_ALIASING
47 select HAVE_DEBUG_STACKOVERFLOW
48 select HAVE_GENERIC_DMA_COHERENT
49 select HAVE_KERNEL_GZIP
50 select HAVE_KERNEL_LZMA
51 select ARCH_HAS_PTE_SPECIAL
53 config ARCH_HAS_CACHE_LINE_SIZE
59 config TRACE_IRQFLAGS_SUPPORT
62 config LOCKDEP_SUPPORT
65 config SCHED_OMIT_FRAME_POINTER
71 config RWSEM_GENERIC_SPINLOCK
74 config ARCH_DISCONTIGMEM_ENABLE
77 config ARCH_FLATMEM_ENABLE
86 config GENERIC_CALIBRATE_DELAY
89 config GENERIC_HWEIGHT
92 config STACKTRACE_SUPPORT
96 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
100 source "init/Kconfig"
101 source "kernel/Kconfig.freezer"
103 menu "ARC Architecture Configuration"
105 menu "ARC Platform/SoC/Board"
107 source "arch/arc/plat-tb10x/Kconfig"
108 source "arch/arc/plat-axs10x/Kconfig"
109 #New platform adds here
110 source "arch/arc/plat-eznps/Kconfig"
111 source "arch/arc/plat-hsdk/Kconfig"
116 prompt "ARC Instruction Set"
117 default ISA_ARCOMPACT
121 select CPU_NO_EFFICIENT_FFS
123 The original ARC ISA of ARC600/700 cores
127 select ARC_TIMERS_64BIT
129 ISA for the Next Generation ARC-HS cores
133 menu "ARC CPU Configuration"
137 default ARC_CPU_770 if ISA_ARCOMPACT
138 default ARC_CPU_HS if ISA_ARCV2
146 Support for ARC750 core
152 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
153 This core has a bunch of cool new features:
154 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
155 Shared Address Spaces (for sharing TLB entires in MMU)
156 -Caches: New Prog Model, Region Flush
157 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
165 Support for ARC HS38x Cores based on ARCv2 ISA
166 The notable features are:
167 - SMP configurations of upto 4 core with coherency
168 - Optional L2 Cache and IO-Coherency
169 - Revised Interrupt Architecture (multiple priorites, reg banks,
170 auto stack switch, auto regfile save/restore)
171 - MMUv4 (PIPT dcache, Huge Pages)
173 * 64bit load/store: LDD, STD
174 * Hardware assisted divide/remainder: DIV, REM
175 * Function prologue/epilogue: ENTER_S, LEAVE_S
176 * IRQ enable/disable: CLRI, SETI
177 * pop count: FFS, FLS
178 * SETcc, BMSKN, XBFU...
182 config CPU_BIG_ENDIAN
183 bool "Enable Big Endian Mode"
186 Build kernel for Big Endian Mode of ARC CPU
189 bool "Symmetric Multi-Processing"
191 select ARC_MCIP if ISA_ARCV2
193 This enables support for systems with more than one CPU.
198 int "Maximum number of CPUs (2-4096)"
202 config ARC_SMP_HALT_ON_RESET
203 bool "Enable Halt-on-reset boot mode"
204 default y if ARC_UBOOT_SUPPORT
206 In SMP configuration cores can be configured as Halt-on-reset
207 or they could all start at same time. For Halt-on-reset, non
208 masters are parked until Master kicks them so they can start of
209 at designated entry point. For other case, all jump to common
210 entry point and spin wait for Master's signal.
215 bool "ARConnect Multicore IP (MCIP) Support "
219 This IP block enables SMP in ARC-HS38 cores.
220 It provides for cross-core interrupts, multi-core debug
221 hardware semaphores, shared memory,....
224 bool "Enable Cache Support"
229 config ARC_CACHE_LINE_SHIFT
230 int "Cache Line Length (as power of 2)"
234 Starting with ARC700 4.9, Cache line length is configurable,
235 This option specifies "N", with Line-len = 2 power N
236 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
237 Linux only supports same line lengths for I and D caches.
239 config ARC_HAS_ICACHE
240 bool "Use Instruction Cache"
243 config ARC_HAS_DCACHE
244 bool "Use Data Cache"
247 config ARC_CACHE_PAGES
248 bool "Per Page Cache Control"
250 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
252 This can be used to over-ride the global I/D Cache Enable on a
253 per-page basis (but only for pages accessed via MMU such as
254 Kernel Virtual address or User Virtual Address)
255 TLB entries have a per-page Cache Enable Bit.
256 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
257 Global DISABLE + Per Page ENABLE won't work
259 config ARC_CACHE_VIPT_ALIASING
260 bool "Support VIPT Aliasing D$"
261 depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
269 Single Cycle RAMS to store Fast Path Code
273 int "ICCM Size in KB"
275 depends on ARC_HAS_ICCM
280 Single Cycle RAMS to store Fast Path Data
284 int "DCCM Size in KB"
286 depends on ARC_HAS_DCCM
289 hex "DCCM map address"
291 depends on ARC_HAS_DCCM
295 default ARC_MMU_V3 if ARC_CPU_770
296 default ARC_MMU_V2 if ARC_CPU_750D
297 default ARC_MMU_V4 if ARC_CPU_HS
309 Fixed the deficiency of v1 - possible thrashing in memcpy scenario
310 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
314 depends on ARC_CPU_770
316 Introduced with ARC700 4.10: New Features
317 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
318 Shared Address Spaces (SASID)
330 prompt "MMU Page Size"
331 default ARC_PAGE_SIZE_8K
333 config ARC_PAGE_SIZE_8K
336 Choose between 8k vs 16k
338 config ARC_PAGE_SIZE_16K
340 depends on ARC_MMU_V3 || ARC_MMU_V4
342 config ARC_PAGE_SIZE_4K
344 depends on ARC_MMU_V3 || ARC_MMU_V4
349 prompt "MMU Super Page Size"
350 depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
351 default ARC_HUGEPAGE_2M
353 config ARC_HUGEPAGE_2M
356 config ARC_HUGEPAGE_16M
362 int "Maximum NUMA Nodes (as a power of 2)"
363 default "0" if !DISCONTIGMEM
364 default "1" if DISCONTIGMEM
365 depends on NEED_MULTIPLE_NODES
367 Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
372 config ARC_COMPACT_IRQ_LEVELS
373 bool "Setup Timer IRQ as high Priority"
375 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
378 config ARC_FPU_SAVE_RESTORE
379 bool "Enable FPU state persistence across context switch"
382 Double Precision Floating Point unit had dedicated regs which
383 need to be saved/restored across context-switch.
384 Note that ARC FPU is overly simplistic, unlike say x86, which has
385 hardware pieces to allow software to conditionally save/restore,
386 based on actual usage of FPU by a task. Thus our implemn does
387 this for all tasks in system.
395 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
397 depends on !ARC_CANT_LLSC
400 bool "Insn: SWAPE (endian-swap)"
406 bool "Insn: 64bit LDD/STD"
408 Enable gcc to generate 64-bit load/store instructions
409 ISA mandates even/odd registers to allow encoding of two
410 dest operands with 2 possible source operands.
413 config ARC_HAS_DIV_REM
414 bool "Insn: div, divu, rem, remu"
417 config ARC_HAS_ACCL_REGS
418 bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
421 Depending on the configuration, CPU can contain accumulator reg-pair
422 (also referred to as r58:r59). These can also be used by gcc as GPR so
423 kernel needs to save/restore per process
427 endmenu # "ARC CPU Configuration"
429 config LINUX_LINK_BASE
430 hex "Kernel link address"
433 ARC700 divides the 32 bit phy address space into two equal halves
434 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
435 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
436 Typically Linux kernel is linked at the start of untransalted addr,
437 hence the default value of 0x8zs.
438 However some customers have peripherals mapped at this addr, so
439 Linux needs to be scooted a bit.
440 If you don't know what the above means, leave this setting alone.
441 This needs to match memory start address specified in Device Tree
443 config LINUX_RAM_BASE
444 hex "RAM base address"
445 default LINUX_LINK_BASE
447 By default Linux is linked at base of RAM. However in some special
448 cases (such as HSDK), Linux can't be linked at start of DDR, hence
452 bool "High Memory Support"
453 select ARCH_DISCONTIGMEM_ENABLE
455 With ARC 2G:2G address split, only upper 2G is directly addressable by
456 kernel. Enable this to potentially allow access to rest of 2G and PAE
460 bool "Support for the 40-bit Physical Address Extension"
464 select PHYS_ADDR_T_64BIT
466 Enable access to physical memory beyond 4G, only supported on
467 ARC cores with 40 bit Physical Addressing support
469 config ARC_KVADDR_SIZE
470 int "Kernel Virtual Address Space size (MB)"
474 The kernel address space is carved out of 256MB of translated address
475 space for catering to vmalloc, modules, pkmap, fixmap. This however may
476 not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
477 this to be stretched to 512 MB (by extending into the reserved
480 config ARC_CURR_IN_REG
481 bool "Dedicate Register r25 for current_task pointer"
484 This reserved Register R25 to point to Current Task in
485 kernel mode. This saves memory access for each such access
488 config ARC_EMUL_UNALIGNED
489 bool "Emulate unaligned memory access (userspace only)"
490 select SYSCTL_ARCH_UNALIGN_NO_WARN
491 select SYSCTL_ARCH_UNALIGN_ALLOW
492 depends on ISA_ARCOMPACT
494 This enables misaligned 16 & 32 bit memory access from user space.
495 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
496 potential bugs in code
499 int "Timer Frequency"
502 config ARC_METAWARE_HLINK
503 bool "Support for Metaware debugger assisted Host access"
506 This options allows a Linux userland apps to directly access
507 host file system (open/creat/read/write etc) with help from
508 Metaware Debugger. This can come in handy for Linux-host communication
509 when there is no real usable peripheral such as EMAC.
517 config ARC_DW2_UNWIND
518 bool "Enable DWARF specific kernel stack unwind"
522 Compiles the kernel with DWARF unwind information and can be used
523 to get stack backtraces.
525 If you say Y here the resulting kernel image will be slightly larger
526 but not slower, and it will give very useful debugging information.
527 If you don't debug the kernel, you can say N, but we may not be able
528 to solve problems without frame unwind information
530 config ARC_DBG_TLB_PARANOIA
531 bool "Paranoia Checks in Low Level TLB Handlers"
536 config ARC_UBOOT_SUPPORT
537 bool "Support uboot arg Handling"
540 ARC Linux by default checks for uboot provided args as pointers to
541 external cmdline or DTB. This however breaks in absence of uboot,
542 when booting from Metaware debugger directly, as the registers are
543 not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
544 registers look like uboot args to kernel which then chokes.
545 So only enable the uboot arg checking/processing if users are sure
546 of uboot being in play.
548 config ARC_BUILTIN_DTB_NAME
549 string "Built in DTB"
551 Set the name of the DTB to embed in the vmlinux binary
552 Leaving it blank selects the minimal "skeleton" dtb
554 source "kernel/Kconfig.preempt"
556 menu "Executable file formats"
557 source "fs/Kconfig.binfmt"
560 endmenu # "ARC Architecture Configuration"
564 config FORCE_MAX_ZONEORDER
565 int "Maximum zone order"
566 default "12" if ARC_HUGEPAGE_16M
570 source "drivers/Kconfig"
575 bool "PCI support" if MIGHT_HAVE_PCI
577 PCI is the name of a bus system, i.e., the way the CPU talks to
578 the other stuff inside your box. Find out if your board/platform
581 Note: PCIe support for Synopsys Device will be available only
582 when HAPS DX is configured with PCIe RC bitmap. If you have PCI,
588 source "drivers/pci/Kconfig"
593 source "arch/arc/Kconfig.debug"
594 source "security/Kconfig"
595 source "crypto/Kconfig"
597 source "kernel/power/Kconfig"