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
43 select HAVE_DEBUG_STACKOVERFLOW
44 select HAVE_GENERIC_DMA_COHERENT
45 select HAVE_KERNEL_GZIP
46 select HAVE_KERNEL_LZMA
48 config ARCH_HAS_CACHE_LINE_SIZE
54 config TRACE_IRQFLAGS_SUPPORT
57 config LOCKDEP_SUPPORT
60 config SCHED_OMIT_FRAME_POINTER
66 config RWSEM_GENERIC_SPINLOCK
69 config ARCH_DISCONTIGMEM_ENABLE
72 config ARCH_FLATMEM_ENABLE
81 config GENERIC_CALIBRATE_DELAY
84 config GENERIC_HWEIGHT
87 config STACKTRACE_SUPPORT
91 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
96 source "kernel/Kconfig.freezer"
98 menu "ARC Architecture Configuration"
100 menu "ARC Platform/SoC/Board"
102 source "arch/arc/plat-tb10x/Kconfig"
103 source "arch/arc/plat-axs10x/Kconfig"
104 #New platform adds here
105 source "arch/arc/plat-eznps/Kconfig"
106 source "arch/arc/plat-hsdk/Kconfig"
111 prompt "ARC Instruction Set"
116 select CPU_NO_EFFICIENT_FFS
118 The original ARC ISA of ARC600/700 cores
122 select ARC_TIMERS_64BIT
124 ISA for the Next Generation ARC-HS cores
128 menu "ARC CPU Configuration"
132 default ARC_CPU_770 if ISA_ARCOMPACT
133 default ARC_CPU_HS if ISA_ARCV2
141 Support for ARC750 core
147 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
148 This core has a bunch of cool new features:
149 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
150 Shared Address Spaces (for sharing TLB entires in MMU)
151 -Caches: New Prog Model, Region Flush
152 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
160 Support for ARC HS38x Cores based on ARCv2 ISA
161 The notable features are:
162 - SMP configurations of upto 4 core with coherency
163 - Optional L2 Cache and IO-Coherency
164 - Revised Interrupt Architecture (multiple priorites, reg banks,
165 auto stack switch, auto regfile save/restore)
166 - MMUv4 (PIPT dcache, Huge Pages)
168 * 64bit load/store: LDD, STD
169 * Hardware assisted divide/remainder: DIV, REM
170 * Function prologue/epilogue: ENTER_S, LEAVE_S
171 * IRQ enable/disable: CLRI, SETI
172 * pop count: FFS, FLS
173 * SETcc, BMSKN, XBFU...
177 config CPU_BIG_ENDIAN
178 bool "Enable Big Endian Mode"
181 Build kernel for Big Endian Mode of ARC CPU
184 bool "Symmetric Multi-Processing"
186 select ARC_MCIP if ISA_ARCV2
188 This enables support for systems with more than one CPU.
193 int "Maximum number of CPUs (2-4096)"
197 config ARC_SMP_HALT_ON_RESET
198 bool "Enable Halt-on-reset boot mode"
199 default y if ARC_UBOOT_SUPPORT
201 In SMP configuration cores can be configured as Halt-on-reset
202 or they could all start at same time. For Halt-on-reset, non
203 masters are parked until Master kicks them so they can start of
204 at designated entry point. For other case, all jump to common
205 entry point and spin wait for Master's signal.
210 bool "ARConnect Multicore IP (MCIP) Support "
214 This IP block enables SMP in ARC-HS38 cores.
215 It provides for cross-core interrupts, multi-core debug
216 hardware semaphores, shared memory,....
219 bool "Enable Cache Support"
224 config ARC_CACHE_LINE_SHIFT
225 int "Cache Line Length (as power of 2)"
229 Starting with ARC700 4.9, Cache line length is configurable,
230 This option specifies "N", with Line-len = 2 power N
231 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
232 Linux only supports same line lengths for I and D caches.
234 config ARC_HAS_ICACHE
235 bool "Use Instruction Cache"
238 config ARC_HAS_DCACHE
239 bool "Use Data Cache"
242 config ARC_CACHE_PAGES
243 bool "Per Page Cache Control"
245 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
247 This can be used to over-ride the global I/D Cache Enable on a
248 per-page basis (but only for pages accessed via MMU such as
249 Kernel Virtual address or User Virtual Address)
250 TLB entries have a per-page Cache Enable Bit.
251 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
252 Global DISABLE + Per Page ENABLE won't work
254 config ARC_CACHE_VIPT_ALIASING
255 bool "Support VIPT Aliasing D$"
256 depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
264 Single Cycle RAMS to store Fast Path Code
268 int "ICCM Size in KB"
270 depends on ARC_HAS_ICCM
275 Single Cycle RAMS to store Fast Path Data
279 int "DCCM Size in KB"
281 depends on ARC_HAS_DCCM
284 hex "DCCM map address"
286 depends on ARC_HAS_DCCM
290 default ARC_MMU_V3 if ARC_CPU_770
291 default ARC_MMU_V2 if ARC_CPU_750D
292 default ARC_MMU_V4 if ARC_CPU_HS
304 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
305 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
309 depends on ARC_CPU_770
311 Introduced with ARC700 4.10: New Features
312 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
313 Shared Address Spaces (SASID)
325 prompt "MMU Page Size"
326 default ARC_PAGE_SIZE_8K
328 config ARC_PAGE_SIZE_8K
331 Choose between 8k vs 16k
333 config ARC_PAGE_SIZE_16K
335 depends on ARC_MMU_V3 || ARC_MMU_V4
337 config ARC_PAGE_SIZE_4K
339 depends on ARC_MMU_V3 || ARC_MMU_V4
344 prompt "MMU Super Page Size"
345 depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
346 default ARC_HUGEPAGE_2M
348 config ARC_HUGEPAGE_2M
351 config ARC_HUGEPAGE_16M
357 int "Maximum NUMA Nodes (as a power of 2)"
358 default "0" if !DISCONTIGMEM
359 default "1" if DISCONTIGMEM
360 depends on NEED_MULTIPLE_NODES
362 Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
367 config ARC_COMPACT_IRQ_LEVELS
368 bool "Setup Timer IRQ as high Priority"
370 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
373 config ARC_FPU_SAVE_RESTORE
374 bool "Enable FPU state persistence across context switch"
377 Double Precision Floating Point unit had dedictaed regs which
378 need to be saved/restored across context-switch.
379 Note that ARC FPU is overly simplistic, unlike say x86, which has
380 hardware pieces to allow software to conditionally save/restore,
381 based on actual usage of FPU by a task. Thus our implemn does
382 this for all tasks in system.
390 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
392 depends on !ARC_CANT_LLSC
395 bool "Insn: SWAPE (endian-swap)"
401 bool "Insn: 64bit LDD/STD"
403 Enable gcc to generate 64-bit load/store instructions
404 ISA mandates even/odd registers to allow encoding of two
405 dest operands with 2 possible source operands.
408 config ARC_HAS_DIV_REM
409 bool "Insn: div, divu, rem, remu"
412 config ARC_HAS_ACCL_REGS
413 bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
416 Depending on the configuration, CPU can contain accumulator reg-pair
417 (also referred to as r58:r59). These can also be used by gcc as GPR so
418 kernel needs to save/restore per process
420 config ARC_IRQ_NO_AUTOSAVE
421 bool "Disable hardware autosave regfile on interrupts"
424 On HS cores, taken interrupt auto saves the regfile on stack.
425 This is programmable and can be optionally disabled in which case
426 software INTERRUPT_PROLOGUE/EPILGUE do the needed work
430 endmenu # "ARC CPU Configuration"
432 config LINUX_LINK_BASE
433 hex "Kernel link address"
436 ARC700 divides the 32 bit phy address space into two equal halves
437 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
438 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
439 Typically Linux kernel is linked at the start of untransalted addr,
440 hence the default value of 0x8zs.
441 However some customers have peripherals mapped at this addr, so
442 Linux needs to be scooted a bit.
443 If you don't know what the above means, leave this setting alone.
444 This needs to match memory start address specified in Device Tree
446 config LINUX_RAM_BASE
447 hex "RAM base address"
448 default LINUX_LINK_BASE
450 By default Linux is linked at base of RAM. However in some special
451 cases (such as HSDK), Linux can't be linked at start of DDR, hence
455 bool "High Memory Support"
456 select ARCH_DISCONTIGMEM_ENABLE
458 With ARC 2G:2G address split, only upper 2G is directly addressable by
459 kernel. Enable this to potentially allow access to rest of 2G and PAE
463 bool "Support for the 40-bit Physical Address Extension"
468 Enable access to physical memory beyond 4G, only supported on
469 ARC cores with 40 bit Physical Addressing support
471 config ARCH_PHYS_ADDR_T_64BIT
472 def_bool ARC_HAS_PAE40
474 config ARCH_DMA_ADDR_T_64BIT
477 config ARC_PLAT_NEEDS_PHYS_TO_DMA
480 config ARC_KVADDR_SIZE
481 int "Kernel Virtaul Address Space size (MB)"
485 The kernel address space is carved out of 256MB of translated address
486 space for catering to vmalloc, modules, pkmap, fixmap. This however may
487 not suffice vmalloc requirements of a 4K CPU EZChip system. So allow
488 this to be stretched to 512 MB (by extending into the reserved
491 config ARC_CURR_IN_REG
492 bool "Dedicate Register r25 for current_task pointer"
495 This reserved Register R25 to point to Current Task in
496 kernel mode. This saves memory access for each such access
499 config ARC_EMUL_UNALIGNED
500 bool "Emulate unaligned memory access (userspace only)"
501 select SYSCTL_ARCH_UNALIGN_NO_WARN
502 select SYSCTL_ARCH_UNALIGN_ALLOW
503 depends on ISA_ARCOMPACT
505 This enables misaligned 16 & 32 bit memory access from user space.
506 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
507 potential bugs in code
510 int "Timer Frequency"
513 config ARC_METAWARE_HLINK
514 bool "Support for Metaware debugger assisted Host access"
517 This options allows a Linux userland apps to directly access
518 host file system (open/creat/read/write etc) with help from
519 Metaware Debugger. This can come in handy for Linux-host communication
520 when there is no real usable peripheral such as EMAC.
528 config ARC_DW2_UNWIND
529 bool "Enable DWARF specific kernel stack unwind"
533 Compiles the kernel with DWARF unwind information and can be used
534 to get stack backtraces.
536 If you say Y here the resulting kernel image will be slightly larger
537 but not slower, and it will give very useful debugging information.
538 If you don't debug the kernel, you can say N, but we may not be able
539 to solve problems without frame unwind information
541 config ARC_DBG_TLB_PARANOIA
542 bool "Paranoia Checks in Low Level TLB Handlers"
547 config ARC_UBOOT_SUPPORT
548 bool "Support uboot arg Handling"
551 ARC Linux by default checks for uboot provided args as pointers to
552 external cmdline or DTB. This however breaks in absence of uboot,
553 when booting from Metaware debugger directly, as the registers are
554 not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
555 registers look like uboot args to kernel which then chokes.
556 So only enable the uboot arg checking/processing if users are sure
557 of uboot being in play.
559 config ARC_BUILTIN_DTB_NAME
560 string "Built in DTB"
562 Set the name of the DTB to embed in the vmlinux binary
563 Leaving it blank selects the minimal "skeleton" dtb
565 source "kernel/Kconfig.preempt"
567 menu "Executable file formats"
568 source "fs/Kconfig.binfmt"
571 endmenu # "ARC Architecture Configuration"
575 config FORCE_MAX_ZONEORDER
576 int "Maximum zone order"
577 default "12" if ARC_HUGEPAGE_16M
581 source "drivers/Kconfig"
586 bool "PCI support" if MIGHT_HAVE_PCI
588 PCI is the name of a bus system, i.e., the way the CPU talks to
589 the other stuff inside your box. Find out if your board/platform
592 Note: PCIe support for Synopsys Device will be available only
593 when HAPS DX is configured with PCIe RC bitmap. If you have PCI,
599 source "drivers/pci/Kconfig"
604 source "arch/arc/Kconfig.debug"
605 source "security/Kconfig"
606 source "crypto/Kconfig"
608 source "kernel/power/Kconfig"