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