[linux-2.6-block.git] / arch / arc / Kconfig

#
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#

config ARC
	def_bool y
	select ARCH_NO_VIRT_TO_BUS
	select CLONE_BACKWARDS
	# ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev
	select DEVTMPFS if !INITRAMFS_SOURCE=""
	select GENERIC_ATOMIC64
	select GENERIC_CLOCKEVENTS
	select GENERIC_FIND_FIRST_BIT
	# for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
	select GENERIC_IRQ_SHOW
	select GENERIC_KERNEL_EXECVE
	select GENERIC_KERNEL_THREAD
	select GENERIC_PENDING_IRQ if SMP
	select GENERIC_SIGALTSTACK
	select GENERIC_SMP_IDLE_THREAD
	select HAVE_ARCH_TRACEHOOK
	select HAVE_GENERIC_HARDIRQS
	select HAVE_MEMBLOCK
	select HAVE_OPROFILE
	select IRQ_DOMAIN
	select MODULES_USE_ELF_RELA
	select NO_BOOTMEM
	select OF
	select OF_EARLY_FLATTREE

config SCHED_OMIT_FRAME_POINTER
	def_bool y

config GENERIC_CSUM
	def_bool y

config RWSEM_GENERIC_SPINLOCK
	def_bool y

config ARCH_FLATMEM_ENABLE
	def_bool y

config MMU
	def_bool y

config NO_IOPORT
	def_bool y

config GENERIC_CALIBRATE_DELAY
	def_bool y

config GENERIC_HWEIGHT
	def_bool y

config BINFMT_ELF
	def_bool y

config HAVE_LATENCYTOP_SUPPORT
	def_bool y

config NO_DMA
	def_bool n

source "init/Kconfig"
source "kernel/Kconfig.freezer"

menu "ARC Architecture Configuration"

choice
	prompt "ARC Platform"
	default ARC_PLAT_FPGA_LEGACY

config ARC_PLAT_FPGA_LEGACY
	bool "\"Legacy\" ARC FPGA dev platform"
	help
	  Support for ARC development platforms, provided by Synopsys.
	  These are based on FPGA or ISS. e.g.
	  - ARCAngel4
	  - ML509
	  - MetaWare ISS

#New platform adds here
endchoice

menu "ARC CPU Configuration"

choice
	prompt "ARC Core"
	default ARC_CPU_770

config ARC_CPU_750D
	bool "ARC750D"
	help
	  Support for ARC750 core

config ARC_CPU_770
	bool "ARC770"
	select ARC_CPU_REL_4_10
	help
	  Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
	  This core has a bunch of cool new features:
	  -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
                   Shared Address Spaces (for sharing TLB entires in MMU)
	  -Caches: New Prog Model, Region Flush
	  -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr

endchoice

config CPU_BIG_ENDIAN
	bool "Enable Big Endian Mode"
	default n
	help
	  Build kernel for Big Endian Mode of ARC CPU

menuconfig ARC_CACHE
	bool "Enable Cache Support"
	default y

if ARC_CACHE

config ARC_CACHE_LINE_SHIFT
	int "Cache Line Length (as power of 2)"
	range 5 7
	default "6"
	help
	  Starting with ARC700 4.9, Cache line length is configurable,
	  This option specifies "N", with Line-len = 2 power N
	  So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
	  Linux only supports same line lengths for I and D caches.

config ARC_HAS_ICACHE
	bool "Use Instruction Cache"
	default y

config ARC_HAS_DCACHE
	bool "Use Data Cache"
	default y

config ARC_CACHE_PAGES
	bool "Per Page Cache Control"
	default y
	depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
	help
	  This can be used to over-ride the global I/D Cache Enable on a
	  per-page basis (but only for pages accessed via MMU such as
	  Kernel Virtual address or User Virtual Address)
	  TLB entries have a per-page Cache Enable Bit.
	  Note that Global I/D ENABLE + Per Page DISABLE works but corollary
	  Global DISABLE + Per Page ENABLE won't work

endif	#ARC_CACHE

config ARC_HAS_HW_MPY
	bool "Use Hardware Multiplier (Normal or Faster XMAC)"
	default y
	help
	  Influences how gcc generates code for MPY operations.
	  If enabled, MPYxx insns are generated, provided by Standard/XMAC
	  Multipler. Otherwise software multipy lib is used

choice
	prompt "ARC700 MMU Version"
	default ARC_MMU_V3 if ARC_CPU_770
	default ARC_MMU_V2 if ARC_CPU_750D

config ARC_MMU_V1
	bool "MMU v1"
	help
	  Orig ARC700 MMU

config ARC_MMU_V2
	bool "MMU v2"
	help
	  Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
	  when 2 D-TLB and 1 I-TLB entries index into same 2way set.

config ARC_MMU_V3
	bool "MMU v3"
	depends on ARC_CPU_770
	help
	  Introduced with ARC700 4.10: New Features
	  Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
	  Shared Address Spaces (SASID)

endchoice


choice
	prompt "MMU Page Size"
	default ARC_PAGE_SIZE_8K

config ARC_PAGE_SIZE_8K
	bool "8KB"
	help
	  Choose between 8k vs 16k

config ARC_PAGE_SIZE_16K
	bool "16KB"
	depends on ARC_MMU_V3

config ARC_PAGE_SIZE_4K
	bool "4KB"
	depends on ARC_MMU_V3

endchoice

config ARC_FPU_SAVE_RESTORE
	bool "Enable FPU state persistence across context switch"
	default n
	help
	  Double Precision Floating Point unit had dedictaed regs which
	  need to be saved/restored across context-switch.
	  Note that ARC FPU is overly simplistic, unlike say x86, which has
	  hardware pieces to allow software to conditionally save/restore,
	  based on actual usage of FPU by a task. Thus our implemn does
	  this for all tasks in system.

menuconfig ARC_CPU_REL_4_10
	bool "Enable support for Rel 4.10 features"
	default n
	help
	  -ARC770 (and dependent features) enabled
	  -ARC750 also shares some of the new features with 770

config ARC_HAS_LLSC
	bool "Insn: LLOCK/SCOND (efficient atomic ops)"
	default y
	depends on ARC_CPU_770
	# if SMP, enable LLSC ONLY if ARC implementation has coherent atomics
	depends on !SMP || ARC_HAS_COH_LLSC

config ARC_HAS_SWAPE
	bool "Insn: SWAPE (endian-swap)"
	default y
	depends on ARC_CPU_REL_4_10

config ARC_HAS_RTSC
	bool "Insn: RTSC (64-bit r/o cycle counter)"
	default y
	depends on ARC_CPU_REL_4_10

endmenu   # "ARC CPU Configuration"

menu "Platform Board Configuration"

source "arch/arc/plat-arcfpga/Kconfig"

#New platform adds here

config LINUX_LINK_BASE
	hex "Linux Link Address"
	default "0x80000000"
	help
	  ARC700 divides the 32 bit phy address space into two equal halves
	  -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
	  -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
	  Typically Linux kernel is linked at the start of untransalted addr,
	  hence the default value of 0x8zs.
	  However some customers have peripherals mapped at this addr, so
	  Linux needs to be scooted a bit.
	  If you don't know what the above means, leave this setting alone.

endmenu # "Platform Board Configuration"

config ARC_CURR_IN_REG
	bool "Dedicate Register r25 for current_task pointer"
	default y
	help
	  This reserved Register R25 to point to Current Task in
	  kernel mode. This saves memory access for each such access

config ARC_STACK_NONEXEC
	bool "Make stack non-executable"
	default n
	help
	  To disable the execute permissions of stack/heap of processes
	  which are enabled by default.

config HZ
	int "Timer Frequency"
	default 100

menuconfig ARC_DBG
	bool "ARC debugging"
	default y

config ARC_DBG_TLB_PARANOIA
	bool "Paranoia Checks in Low Level TLB Handlers"
	depends on ARC_DBG
	default n

config ARC_DBG_TLB_MISS_COUNT
	bool "Profile TLB Misses"
	default n
	select DEBUG_FS
	depends on ARC_DBG
	help
	  Counts number of I and D TLB Misses and exports them via Debugfs
	  The counters can be cleared via Debugfs as well

config CMDLINE
	string "Kernel command line to built-in"
	default "print-fatal-signals=1"
	help
	  The default command line which will be appended to the optional
	  u-boot provided command line (see below)

config CMDLINE_UBOOT
	bool "Support U-boot kernel command line passing"
	default n
	help
	  If you are using U-boot (www.denx.de) and wish to pass the kernel
	  command line from the U-boot environment to the Linux kernel then
	  switch this option on.
	  ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
	  to it. kernel startup code will copy the string into cmdline buffer
	  and also append CONFIG_CMDLINE.

config ARC_BUILTIN_DTB_NAME
	string "Built in DTB"
	help
	  Set the name of the DTB to embed in the vmlinux binary
	  Leaving it blank selects the minimal "skeleton" dtb

source "kernel/Kconfig.preempt"

endmenu	 # "ARC Architecture Configuration"

source "mm/Kconfig"
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
source "arch/arc/Kconfig.debug"
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"
Commit	Line	Data
cfdbc2e1 VG	1	#
	2	# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
	3	#
	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.
	7	#
	8
	9	config ARC
	10	def_bool y
	11	select ARCH_NO_VIRT_TO_BUS
4adeefe1	12	select CLONE_BACKWARDS
cfdbc2e1 VG	13	# ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev
	14	select DEVTMPFS if !INITRAMFS_SOURCE=""
	15	select GENERIC_ATOMIC64
	16	select GENERIC_CLOCKEVENTS
	17	select GENERIC_FIND_FIRST_BIT
	18	# for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
	19	select GENERIC_IRQ_SHOW
bf90e1ea VG	20	select GENERIC_KERNEL_EXECVE
bf90e1ea VG	21	select GENERIC_KERNEL_THREAD
cfdbc2e1	22	select GENERIC_PENDING_IRQ if SMP
c3581039	23	select GENERIC_SIGALTSTACK
cfdbc2e1	24	select GENERIC_SMP_IDLE_THREAD
547f1125	25	select HAVE_ARCH_TRACEHOOK
cfdbc2e1	26	select HAVE_GENERIC_HARDIRQS
c121c506	27	select HAVE_MEMBLOCK
769bc1fd	28	select HAVE_OPROFILE
999159a5	29	select IRQ_DOMAIN
cfdbc2e1	30	select MODULES_USE_ELF_RELA
c121c506	31	select NO_BOOTMEM
999159a5 VG	32	select OF
999159a5 VG	33	select OF_EARLY_FLATTREE
cfdbc2e1 VG	34
	35	config SCHED_OMIT_FRAME_POINTER
	36	def_bool y
	37
	38	config GENERIC_CSUM
	39	def_bool y
	40
	41	config RWSEM_GENERIC_SPINLOCK
	42	def_bool y
	43
	44	config ARCH_FLATMEM_ENABLE
	45	def_bool y
	46
	47	config MMU
	48	def_bool y
	49
	50	config NO_IOPORT
	51	def_bool y
	52
	53	config GENERIC_CALIBRATE_DELAY
	54	def_bool y
	55
	56	config GENERIC_HWEIGHT
	57	def_bool y
	58
	59	config BINFMT_ELF
	60	def_bool y
	61
	62	config HAVE_LATENCYTOP_SUPPORT
	63	def_bool y
	64
	65	config NO_DMA
	66	def_bool n
	67
	68	source "init/Kconfig"
	69	source "kernel/Kconfig.freezer"
	70
	71	menu "ARC Architecture Configuration"
	72
	73	choice
	74	prompt "ARC Platform"
	75	default ARC_PLAT_FPGA_LEGACY
	76
	77	config ARC_PLAT_FPGA_LEGACY
	78	bool "\"Legacy\" ARC FPGA dev platform"
	79	help
	80	Support for ARC development platforms, provided by Synopsys.
	81	These are based on FPGA or ISS. e.g.
	82	- ARCAngel4
	83	- ML509
	84	- MetaWare ISS
	85
	86	#New platform adds here
	87	endchoice
	88
	89	menu "ARC CPU Configuration"
	90
	91	choice
	92	prompt "ARC Core"
	93	default ARC_CPU_770
	94
	95	config ARC_CPU_750D
	96	bool "ARC750D"
	97	help
98	Support for ARC750 core
99
100	config ARC_CPU_770
101	bool "ARC770"
102	select ARC_CPU_REL_4_10
103	help
104	Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
105	This core has a bunch of cool new features:
106	-MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
107	Shared Address Spaces (for sharing TLB entires in MMU)
108	-Caches: New Prog Model, Region Flush
109	-Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
110
111	endchoice
112
113	config CPU_BIG_ENDIAN
114	bool "Enable Big Endian Mode"
115	default n
116	help
117	Build kernel for Big Endian Mode of ARC CPU
118
119	menuconfig ARC_CACHE
120	bool "Enable Cache Support"
121	default y
122
123	if ARC_CACHE
124
125	config ARC_CACHE_LINE_SHIFT
126	int "Cache Line Length (as power of 2)"
127	range 5 7
128	default "6"
129	help
130	Starting with ARC700 4.9, Cache line length is configurable,
131	This option specifies "N", with Line-len = 2 power N
132	So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
133	Linux only supports same line lengths for I and D caches.
134
135	config ARC_HAS_ICACHE
136	bool "Use Instruction Cache"
137	default y
138
139	config ARC_HAS_DCACHE
140	bool "Use Data Cache"
141	default y
142
143	config ARC_CACHE_PAGES
144	bool "Per Page Cache Control"
145	default y
146	depends on ARC_HAS_ICACHE \|\| ARC_HAS_DCACHE
147	help
148	This can be used to over-ride the global I/D Cache Enable on a
149	per-page basis (but only for pages accessed via MMU such as
150	Kernel Virtual address or User Virtual Address)
151	TLB entries have a per-page Cache Enable Bit.
152	Note that Global I/D ENABLE + Per Page DISABLE works but corollary
153	Global DISABLE + Per Page ENABLE won't work
154
155	endif #ARC_CACHE
156
157	config ARC_HAS_HW_MPY
158	bool "Use Hardware Multiplier (Normal or Faster XMAC)"
159	default y
160	help
161	Influences how gcc generates code for MPY operations.
162	If enabled, MPYxx insns are generated, provided by Standard/XMAC
163	Multipler. Otherwise software multipy lib is used
164
165	choice
166	prompt "ARC700 MMU Version"
167	default ARC_MMU_V3 if ARC_CPU_770
168	default ARC_MMU_V2 if ARC_CPU_750D
169
170	config ARC_MMU_V1
171	bool "MMU v1"
172	help
173	Orig ARC700 MMU
174
175	config ARC_MMU_V2
176	bool "MMU v2"
177	help
178	Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
179	when 2 D-TLB and 1 I-TLB entries index into same 2way set.
180
181	config ARC_MMU_V3
182	bool "MMU v3"
183	depends on ARC_CPU_770
184	help
185	Introduced with ARC700 4.10: New Features
186	Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
187	Shared Address Spaces (SASID)
188
189	endchoice
190
191
192	choice
193	prompt "MMU Page Size"
194	default ARC_PAGE_SIZE_8K
195
196	config ARC_PAGE_SIZE_8K
197	bool "8KB"
198	help
199	Choose between 8k vs 16k
200
201	config ARC_PAGE_SIZE_16K
202	bool "16KB"
203	depends on ARC_MMU_V3
204
205	config ARC_PAGE_SIZE_4K
206	bool "4KB"
207	depends on ARC_MMU_V3
208
209	endchoice
210
211	config ARC_FPU_SAVE_RESTORE
212	bool "Enable FPU state persistence across context switch"
213	default n
214	help
215	Double Precision Floating Point unit had dedictaed regs which
216	need to be saved/restored across context-switch.
217	Note that ARC FPU is overly simplistic, unlike say x86, which has
218	hardware pieces to allow software to conditionally save/restore,
219	based on actual usage of FPU by a task. Thus our implemn does
220	this for all tasks in system.
221
222	menuconfig ARC_CPU_REL_4_10
223	bool "Enable support for Rel 4.10 features"
224	default n
225	help
226	-ARC770 (and dependent features) enabled
227	-ARC750 also shares some of the new features with 770
228
229	config ARC_HAS_LLSC
230	bool "Insn: LLOCK/SCOND (efficient atomic ops)"
231	default y
232	depends on ARC_CPU_770
233	# if SMP, enable LLSC ONLY if ARC implementation has coherent atomics
234	depends on !SMP \|\| ARC_HAS_COH_LLSC
235
236	config ARC_HAS_SWAPE
237	bool "Insn: SWAPE (endian-swap)"
238	default y
239	depends on ARC_CPU_REL_4_10
240
241	config ARC_HAS_RTSC
242	bool "Insn: RTSC (64-bit r/o cycle counter)"
243	default y
244	depends on ARC_CPU_REL_4_10
245
246	endmenu # "ARC CPU Configuration"
247
248	menu "Platform Board Configuration"
249
250	source "arch/arc/plat-arcfpga/Kconfig"
251
252	#New platform adds here
253
cfdbc2e1 VG	254	config LINUX_LINK_BASE
	255	hex "Linux Link Address"
	256	default "0x80000000"
	257	help
	258	ARC700 divides the 32 bit phy address space into two equal halves
	259	-Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
	260	-Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
	261	Typically Linux kernel is linked at the start of untransalted addr,
	262	hence the default value of 0x8zs.
	263	However some customers have peripherals mapped at this addr, so
	264	Linux needs to be scooted a bit.
	265	If you don't know what the above means, leave this setting alone.
	266
cfdbc2e1 VG	267	endmenu # "Platform Board Configuration"
cfdbc2e1 VG	268
080c3747 VG	269	config ARC_CURR_IN_REG
	270	bool "Dedicate Register r25 for current_task pointer"
	271	default y
	272	help
	273	This reserved Register R25 to point to Current Task in
	274	kernel mode. This saves memory access for each such access
	275
cfdbc2e1 VG	276	config ARC_STACK_NONEXEC
	277	bool "Make stack non-executable"
	278	default n
	279	help
	280	To disable the execute permissions of stack/heap of processes
	281	which are enabled by default.
	282
	283	config HZ
	284	int "Timer Frequency"
	285	default 100
	286
	287	menuconfig ARC_DBG
	288	bool "ARC debugging"
	289	default y
	290
	291	config ARC_DBG_TLB_PARANOIA
	292	bool "Paranoia Checks in Low Level TLB Handlers"
	293	depends on ARC_DBG
	294	default n
	295
	296	config ARC_DBG_TLB_MISS_COUNT
	297	bool "Profile TLB Misses"
	298	default n
	299	select DEBUG_FS
	300	depends on ARC_DBG
	301	help
	302	Counts number of I and D TLB Misses and exports them via Debugfs
	303	The counters can be cleared via Debugfs as well
	304
	305	config CMDLINE
	306	string "Kernel command line to built-in"
	307	default "print-fatal-signals=1"
	308	help
	309	The default command line which will be appended to the optional
	310	u-boot provided command line (see below)
	311
	312	config CMDLINE_UBOOT
	313	bool "Support U-boot kernel command line passing"
	314	default n
	315	help
	316	If you are using U-boot (www.denx.de) and wish to pass the kernel
	317	command line from the U-boot environment to the Linux kernel then
	318	switch this option on.
	319	ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
	320	to it. kernel startup code will copy the string into cmdline buffer
	321	and also append CONFIG_CMDLINE.
	322
999159a5 VG	323	config ARC_BUILTIN_DTB_NAME
	324	string "Built in DTB"
	325	help
	326	Set the name of the DTB to embed in the vmlinux binary
	327	Leaving it blank selects the minimal "skeleton" dtb
	328
cfdbc2e1 VG	329	source "kernel/Kconfig.preempt"
	330
	331	endmenu # "ARC Architecture Configuration"
	332
	333	source "mm/Kconfig"
	334	source "net/Kconfig"
	335	source "drivers/Kconfig"
	336	source "fs/Kconfig"
	337	source "arch/arc/Kconfig.debug"
	338	source "security/Kconfig"
	339	source "crypto/Kconfig"
	340	source "lib/Kconfig"