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