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 if FUTEX
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 if ARC_CACHE_VIPT_ALIASING
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"
103 source "arch/arc/plat-hsdk/Kconfig"
108 prompt "ARC Instruction Set"
109 default ISA_ARCOMPACT
113 select CPU_NO_EFFICIENT_FFS
115 The original ARC ISA of ARC600/700 cores
119 select ARC_TIMERS_64BIT
121 ISA for the Next Generation ARC-HS cores
125 menu "ARC CPU Configuration"
129 default ARC_CPU_770 if ISA_ARCOMPACT
130 default ARC_CPU_HS if ISA_ARCV2
138 Support for ARC750 core
144 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
145 This core has a bunch of cool new features:
146 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
147 Shared Address Spaces (for sharing TLB entires in MMU)
148 -Caches: New Prog Model, Region Flush
149 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
157 Support for ARC HS38x Cores based on ARCv2 ISA
158 The notable features are:
159 - SMP configurations of upto 4 core with coherency
160 - Optional L2 Cache and IO-Coherency
161 - Revised Interrupt Architecture (multiple priorites, reg banks,
162 auto stack switch, auto regfile save/restore)
163 - MMUv4 (PIPT dcache, Huge Pages)
165 * 64bit load/store: LDD, STD
166 * Hardware assisted divide/remainder: DIV, REM
167 * Function prologue/epilogue: ENTER_S, LEAVE_S
168 * IRQ enable/disable: CLRI, SETI
169 * pop count: FFS, FLS
170 * SETcc, BMSKN, XBFU...
174 config CPU_BIG_ENDIAN
175 bool "Enable Big Endian Mode"
178 Build kernel for Big Endian Mode of ARC CPU
181 bool "Symmetric Multi-Processing"
183 select ARC_MCIP if ISA_ARCV2
185 This enables support for systems with more than one CPU.
190 int "Maximum number of CPUs (2-4096)"
194 config ARC_SMP_HALT_ON_RESET
195 bool "Enable Halt-on-reset boot mode"
196 default y if ARC_UBOOT_SUPPORT
198 In SMP configuration cores can be configured as Halt-on-reset
199 or they could all start at same time. For Halt-on-reset, non
200 masters are parked until Master kicks them so they can start of
201 at designated entry point. For other case, all jump to common
202 entry point and spin wait for Master's signal.
207 bool "ARConnect Multicore IP (MCIP) Support "
211 This IP block enables SMP in ARC-HS38 cores.
212 It provides for cross-core interrupts, multi-core debug
213 hardware semaphores, shared memory,....
216 bool "Enable Cache Support"
221 config ARC_CACHE_LINE_SHIFT
222 int "Cache Line Length (as power of 2)"
226 Starting with ARC700 4.9, Cache line length is configurable,
227 This option specifies "N", with Line-len = 2 power N
228 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
229 Linux only supports same line lengths for I and D caches.
231 config ARC_HAS_ICACHE
232 bool "Use Instruction Cache"
235 config ARC_HAS_DCACHE
236 bool "Use Data Cache"
239 config ARC_CACHE_PAGES
240 bool "Per Page Cache Control"
242 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
244 This can be used to over-ride the global I/D Cache Enable on a
245 per-page basis (but only for pages accessed via MMU such as
246 Kernel Virtual address or User Virtual Address)
247 TLB entries have a per-page Cache Enable Bit.
248 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
249 Global DISABLE + Per Page ENABLE won't work
251 config ARC_CACHE_VIPT_ALIASING
252 bool "Support VIPT Aliasing D$"
253 depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
261 Single Cycle RAMS to store Fast Path Code
265 int "ICCM Size in KB"
267 depends on ARC_HAS_ICCM
272 Single Cycle RAMS to store Fast Path Data
276 int "DCCM Size in KB"
278 depends on ARC_HAS_DCCM
281 hex "DCCM map address"
283 depends on ARC_HAS_DCCM
287 default ARC_MMU_V3 if ARC_CPU_770
288 default ARC_MMU_V2 if ARC_CPU_750D
289 default ARC_MMU_V4 if ARC_CPU_HS
301 Fixed the deficiency of v1 - possible thrashing in memcpy scenario
302 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
306 depends on ARC_CPU_770
308 Introduced with ARC700 4.10: New Features
309 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
310 Shared Address Spaces (SASID)
322 prompt "MMU Page Size"
323 default ARC_PAGE_SIZE_8K
325 config ARC_PAGE_SIZE_8K
328 Choose between 8k vs 16k
330 config ARC_PAGE_SIZE_16K
332 depends on ARC_MMU_V3 || ARC_MMU_V4
334 config ARC_PAGE_SIZE_4K
336 depends on ARC_MMU_V3 || ARC_MMU_V4
341 prompt "MMU Super Page Size"
342 depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
343 default ARC_HUGEPAGE_2M
345 config ARC_HUGEPAGE_2M
348 config ARC_HUGEPAGE_16M
354 int "Maximum NUMA Nodes (as a power of 2)"
355 default "0" if !DISCONTIGMEM
356 default "1" if DISCONTIGMEM
357 depends on NEED_MULTIPLE_NODES
359 Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
364 config ARC_COMPACT_IRQ_LEVELS
365 bool "Setup Timer IRQ as high Priority"
367 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
370 config ARC_FPU_SAVE_RESTORE
371 bool "Enable FPU state persistence across context switch"
374 Double Precision Floating Point unit had dedicated regs which
375 need to be saved/restored across context-switch.
376 Note that ARC FPU is overly simplistic, unlike say x86, which has
377 hardware pieces to allow software to conditionally save/restore,
378 based on actual usage of FPU by a task. Thus our implemn does
379 this for all tasks in system.
387 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
389 depends on !ARC_CANT_LLSC
392 bool "Insn: SWAPE (endian-swap)"
398 bool "Insn: 64bit LDD/STD"
400 Enable gcc to generate 64-bit load/store instructions
401 ISA mandates even/odd registers to allow encoding of two
402 dest operands with 2 possible source operands.
405 config ARC_HAS_DIV_REM
406 bool "Insn: div, divu, rem, remu"
409 config ARC_HAS_ACCL_REGS
410 bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
413 Depending on the configuration, CPU can contain accumulator reg-pair
414 (also referred to as r58:r59). These can also be used by gcc as GPR so
415 kernel needs to save/restore per process
419 endmenu # "ARC CPU Configuration"
421 config LINUX_LINK_BASE
422 hex "Kernel link address"
425 ARC700 divides the 32 bit phy address space into two equal halves
426 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
427 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
428 Typically Linux kernel is linked at the start of untransalted addr,
429 hence the default value of 0x8zs.
430 However some customers have peripherals mapped at this addr, so
431 Linux needs to be scooted a bit.
432 If you don't know what the above means, leave this setting alone.
433 This needs to match memory start address specified in Device Tree
435 config LINUX_RAM_BASE
436 hex "RAM base address"
437 default LINUX_LINK_BASE
439 By default Linux is linked at base of RAM. However in some special
440 cases (such as HSDK), Linux can't be linked at start of DDR, hence
444 bool "High Memory Support"
445 select ARCH_DISCONTIGMEM_ENABLE
447 With ARC 2G:2G address split, only upper 2G is directly addressable by
448 kernel. Enable this to potentially allow access to rest of 2G and PAE
452 bool "Support for the 40-bit Physical Address Extension"
457 Enable access to physical memory beyond 4G, only supported on
458 ARC cores with 40 bit Physical Addressing support
460 config ARCH_PHYS_ADDR_T_64BIT
461 def_bool ARC_HAS_PAE40
463 config ARCH_DMA_ADDR_T_64BIT
466 config ARC_KVADDR_SIZE
467 int "Kernel Virtual Address Space size (MB)"
471 The kernel address space is carved out of 256MB of translated address
472 space for catering to vmalloc, modules, pkmap, fixmap. This however may
473 not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
474 this to be stretched to 512 MB (by extending into the reserved
477 config ARC_CURR_IN_REG
478 bool "Dedicate Register r25 for current_task pointer"
481 This reserved Register R25 to point to Current Task in
482 kernel mode. This saves memory access for each such access
485 config ARC_EMUL_UNALIGNED
486 bool "Emulate unaligned memory access (userspace only)"
488 select SYSCTL_ARCH_UNALIGN_NO_WARN
489 select SYSCTL_ARCH_UNALIGN_ALLOW
490 depends on ISA_ARCOMPACT
492 This enables misaligned 16 & 32 bit memory access from user space.
493 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
494 potential bugs in code
497 int "Timer Frequency"
500 config ARC_METAWARE_HLINK
501 bool "Support for Metaware debugger assisted Host access"
504 This options allows a Linux userland apps to directly access
505 host file system (open/creat/read/write etc) with help from
506 Metaware Debugger. This can come in handy for Linux-host communication
507 when there is no real usable peripheral such as EMAC.
515 config ARC_DW2_UNWIND
516 bool "Enable DWARF specific kernel stack unwind"
520 Compiles the kernel with DWARF unwind information and can be used
521 to get stack backtraces.
523 If you say Y here the resulting kernel image will be slightly larger
524 but not slower, and it will give very useful debugging information.
525 If you don't debug the kernel, you can say N, but we may not be able
526 to solve problems without frame unwind information
528 config ARC_DBG_TLB_PARANOIA
529 bool "Paranoia Checks in Low Level TLB Handlers"
534 config ARC_UBOOT_SUPPORT
535 bool "Support uboot arg Handling"
538 ARC Linux by default checks for uboot provided args as pointers to
539 external cmdline or DTB. This however breaks in absence of uboot,
540 when booting from Metaware debugger directly, as the registers are
541 not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
542 registers look like uboot args to kernel which then chokes.
543 So only enable the uboot arg checking/processing if users are sure
544 of uboot being in play.
546 config ARC_BUILTIN_DTB_NAME
547 string "Built in DTB"
549 Set the name of the DTB to embed in the vmlinux binary
550 Leaving it blank selects the minimal "skeleton" dtb
552 source "kernel/Kconfig.preempt"
554 menu "Executable file formats"
555 source "fs/Kconfig.binfmt"
558 endmenu # "ARC Architecture Configuration"
562 config FORCE_MAX_ZONEORDER
563 int "Maximum zone order"
564 default "12" if ARC_HUGEPAGE_16M
568 source "drivers/Kconfig"
573 bool "PCI support" if MIGHT_HAVE_PCI
575 PCI is the name of a bus system, i.e., the way the CPU talks to
576 the other stuff inside your box. Find out if your board/platform
579 Note: PCIe support for Synopsys Device will be available only
580 when HAPS DX is configured with PCIe RC bitmap. If you have PCI,
586 source "drivers/pci/Kconfig"
591 source "arch/arc/Kconfig.debug"
592 source "security/Kconfig"
593 source "crypto/Kconfig"
595 source "kernel/power/Kconfig"