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_DMA_COHERENT_TO_PFN
13 select ARCH_HAS_PTE_SPECIAL
14 select ARCH_HAS_SETUP_DMA_OPS
15 select ARCH_HAS_SYNC_DMA_FOR_CPU
16 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
17 select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
18 select ARCH_32BIT_OFF_T
19 select BUILDTIME_EXTABLE_SORT
20 select CLONE_BACKWARDS
22 select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
23 select GENERIC_CLOCKEVENTS
24 select GENERIC_FIND_FIRST_BIT
25 # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
26 select GENERIC_IRQ_SHOW
27 select GENERIC_PCI_IOMAP
28 select GENERIC_PENDING_IRQ if SMP
29 select GENERIC_SCHED_CLOCK
30 select GENERIC_SMP_IDLE_THREAD
32 select HAVE_ARCH_TRACEHOOK
33 select HAVE_DEBUG_STACKOVERFLOW
34 select HAVE_FUTEX_CMPXCHG if FUTEX
35 select HAVE_IOREMAP_PROT
36 select HAVE_KERNEL_GZIP
37 select HAVE_KERNEL_LZMA
39 select HAVE_KRETPROBES
40 select HAVE_MOD_ARCH_SPECIFIC
42 select HAVE_PERF_EVENTS
43 select HANDLE_DOMAIN_IRQ
45 select MODULES_USE_ELF_RELA
47 select OF_EARLY_FLATTREE
48 select PCI_SYSCALL if PCI
49 select PERF_USE_VMALLOC if ARC_CACHE_VIPT_ALIASING
51 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
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"
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 entries 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"
177 Build kernel for Big Endian Mode of ARC CPU
180 bool "Symmetric Multi-Processing"
181 select ARC_MCIP if ISA_ARCV2
183 This enables support for systems with more than one CPU.
188 int "Maximum number of CPUs (2-4096)"
192 config ARC_SMP_HALT_ON_RESET
193 bool "Enable Halt-on-reset boot mode"
195 In SMP configuration cores can be configured as Halt-on-reset
196 or they could all start at same time. For Halt-on-reset, non
197 masters are parked until Master kicks them so they can start of
198 at designated entry point. For other case, all jump to common
199 entry point and spin wait for Master's signal.
204 bool "ARConnect Multicore IP (MCIP) Support "
208 This IP block enables SMP in ARC-HS38 cores.
209 It provides for cross-core interrupts, multi-core debug
210 hardware semaphores, shared memory,....
213 bool "Enable Cache Support"
218 config ARC_CACHE_LINE_SHIFT
219 int "Cache Line Length (as power of 2)"
223 Starting with ARC700 4.9, Cache line length is configurable,
224 This option specifies "N", with Line-len = 2 power N
225 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
226 Linux only supports same line lengths for I and D caches.
228 config ARC_HAS_ICACHE
229 bool "Use Instruction Cache"
232 config ARC_HAS_DCACHE
233 bool "Use Data Cache"
236 config ARC_CACHE_PAGES
237 bool "Per Page Cache Control"
239 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
241 This can be used to over-ride the global I/D Cache Enable on a
242 per-page basis (but only for pages accessed via MMU such as
243 Kernel Virtual address or User Virtual Address)
244 TLB entries have a per-page Cache Enable Bit.
245 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
246 Global DISABLE + Per Page ENABLE won't work
248 config ARC_CACHE_VIPT_ALIASING
249 bool "Support VIPT Aliasing D$"
250 depends on ARC_HAS_DCACHE && ISA_ARCOMPACT
257 Single Cycle RAMS to store Fast Path Code
260 int "ICCM Size in KB"
262 depends on ARC_HAS_ICCM
267 Single Cycle RAMS to store Fast Path Data
270 int "DCCM Size in KB"
272 depends on ARC_HAS_DCCM
275 hex "DCCM map address"
277 depends on ARC_HAS_DCCM
281 default ARC_MMU_V3 if ARC_CPU_770
282 default ARC_MMU_V2 if ARC_CPU_750D
283 default ARC_MMU_V4 if ARC_CPU_HS
295 Fixed the deficiency of v1 - possible thrashing in memcpy scenario
296 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
300 depends on ARC_CPU_770
302 Introduced with ARC700 4.10: New Features
303 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
304 Shared Address Spaces (SASID)
316 prompt "MMU Page Size"
317 default ARC_PAGE_SIZE_8K
319 config ARC_PAGE_SIZE_8K
322 Choose between 8k vs 16k
324 config ARC_PAGE_SIZE_16K
326 depends on ARC_MMU_V3 || ARC_MMU_V4
328 config ARC_PAGE_SIZE_4K
330 depends on ARC_MMU_V3 || ARC_MMU_V4
335 prompt "MMU Super Page Size"
336 depends on ISA_ARCV2 && TRANSPARENT_HUGEPAGE
337 default ARC_HUGEPAGE_2M
339 config ARC_HUGEPAGE_2M
342 config ARC_HUGEPAGE_16M
348 int "Maximum NUMA Nodes (as a power of 2)"
349 default "0" if !DISCONTIGMEM
350 default "1" if DISCONTIGMEM
351 depends on NEED_MULTIPLE_NODES
353 Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
358 config ARC_COMPACT_IRQ_LEVELS
359 bool "Setup Timer IRQ as high Priority"
360 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
363 config ARC_FPU_SAVE_RESTORE
364 bool "Enable FPU state persistence across context switch"
366 Double Precision Floating Point unit had dedicated regs which
367 need to be saved/restored across context-switch.
368 Note that ARC FPU is overly simplistic, unlike say x86, which has
369 hardware pieces to allow software to conditionally save/restore,
370 based on actual usage of FPU by a task. Thus our implemn does
371 this for all tasks in system.
379 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
381 depends on !ARC_CANT_LLSC
384 bool "Insn: SWAPE (endian-swap)"
390 bool "Insn: 64bit LDD/STD"
392 Enable gcc to generate 64-bit load/store instructions
393 ISA mandates even/odd registers to allow encoding of two
394 dest operands with 2 possible source operands.
397 config ARC_HAS_DIV_REM
398 bool "Insn: div, divu, rem, remu"
401 config ARC_HAS_ACCL_REGS
402 bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
405 Depending on the configuration, CPU can contain accumulator reg-pair
406 (also referred to as r58:r59). These can also be used by gcc as GPR so
407 kernel needs to save/restore per process
409 config ARC_IRQ_NO_AUTOSAVE
410 bool "Disable hardware autosave regfile on interrupts"
413 On HS cores, taken interrupt auto saves the regfile on stack.
414 This is programmable and can be optionally disabled in which case
415 software INTERRUPT_PROLOGUE/EPILGUE do the needed work
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"
455 select PHYS_ADDR_T_64BIT
457 Enable access to physical memory beyond 4G, only supported on
458 ARC cores with 40 bit Physical Addressing support
460 config ARC_KVADDR_SIZE
461 int "Kernel Virtual 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)"
481 select SYSCTL_ARCH_UNALIGN_NO_WARN
482 select SYSCTL_ARCH_UNALIGN_ALLOW
483 depends on ISA_ARCOMPACT
485 This enables misaligned 16 & 32 bit memory access from user space.
486 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
487 potential bugs in code
490 int "Timer Frequency"
493 config ARC_METAWARE_HLINK
494 bool "Support for Metaware debugger assisted Host access"
496 This options allows a Linux userland apps to directly access
497 host file system (open/creat/read/write etc) with help from
498 Metaware Debugger. This can come in handy for Linux-host communication
499 when there is no real usable peripheral such as EMAC.
507 config ARC_DW2_UNWIND
508 bool "Enable DWARF specific kernel stack unwind"
512 Compiles the kernel with DWARF unwind information and can be used
513 to get stack backtraces.
515 If you say Y here the resulting kernel image will be slightly larger
516 but not slower, and it will give very useful debugging information.
517 If you don't debug the kernel, you can say N, but we may not be able
518 to solve problems without frame unwind information
520 config ARC_DBG_TLB_PARANOIA
521 bool "Paranoia Checks in Low Level TLB Handlers"
525 config ARC_BUILTIN_DTB_NAME
526 string "Built in DTB"
528 Set the name of the DTB to embed in the vmlinux binary
529 Leaving it blank selects the minimal "skeleton" dtb
531 endmenu # "ARC Architecture Configuration"
533 config FORCE_MAX_ZONEORDER
534 int "Maximum zone order"
535 default "12" if ARC_HUGEPAGE_16M
538 source "kernel/power/Kconfig"