[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 MODULES_USE_ELF_RELA

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 ARC_PLAT_CLK
	int "Clk speed in Hz"
	default "80000000"

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.

config ARC_PLAT_SDRAM_SIZE
	hex "SD RAM Size"
	default "0x10000000"
	help
	  Implies the amount of SDRAM/DRAM Linux is going to claim/own.
	  The actual memory itself could be larger than this number. But for
	  all software purposes, this is the amt of memory.

endmenu # "Platform Board Configuration"

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.

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
	25	select HAVE_GENERIC_HARDIRQS
	26	select MODULES_USE_ELF_RELA
	27
	28	config SCHED_OMIT_FRAME_POINTER
	29	def_bool y
	30
	31	config GENERIC_CSUM
	32	def_bool y
	33
	34	config RWSEM_GENERIC_SPINLOCK
	35	def_bool y
	36
	37	config ARCH_FLATMEM_ENABLE
	38	def_bool y
	39
	40	config MMU
	41	def_bool y
	42
	43	config NO_IOPORT
	44	def_bool y
	45
	46	config GENERIC_CALIBRATE_DELAY
	47	def_bool y
	48
	49	config GENERIC_HWEIGHT
	50	def_bool y
	51
	52	config BINFMT_ELF
	53	def_bool y
	54
	55	config HAVE_LATENCYTOP_SUPPORT
	56	def_bool y
	57
	58	config NO_DMA
	59	def_bool n
	60
	61	source "init/Kconfig"
	62	source "kernel/Kconfig.freezer"
	63
	64	menu "ARC Architecture Configuration"
	65
	66	choice
	67	prompt "ARC Platform"
	68	default ARC_PLAT_FPGA_LEGACY
	69
	70	config ARC_PLAT_FPGA_LEGACY
	71	bool "\"Legacy\" ARC FPGA dev platform"
	72	help
	73	Support for ARC development platforms, provided by Synopsys.
	74	These are based on FPGA or ISS. e.g.
	75	- ARCAngel4
	76	- ML509
	77	- MetaWare ISS
	78
	79	#New platform adds here
	80	endchoice
	81
	82	menu "ARC CPU Configuration"
	83
	84	choice
	85	prompt "ARC Core"
	86	default ARC_CPU_770
	87
88	config ARC_CPU_750D
89	bool "ARC750D"
90	help
91	Support for ARC750 core
92
93	config ARC_CPU_770
94	bool "ARC770"
95	select ARC_CPU_REL_4_10
96	help
97	Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
98	This core has a bunch of cool new features:
99	-MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
100	Shared Address Spaces (for sharing TLB entires in MMU)
101	-Caches: New Prog Model, Region Flush
102	-Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
103
104	endchoice
105
106	config CPU_BIG_ENDIAN
107	bool "Enable Big Endian Mode"
108	default n
109	help
110	Build kernel for Big Endian Mode of ARC CPU
111
112	menuconfig ARC_CACHE
113	bool "Enable Cache Support"
114	default y
115
116	if ARC_CACHE
117
118	config ARC_CACHE_LINE_SHIFT
119	int "Cache Line Length (as power of 2)"
120	range 5 7
121	default "6"
122	help
123	Starting with ARC700 4.9, Cache line length is configurable,
124	This option specifies "N", with Line-len = 2 power N
125	So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
126	Linux only supports same line lengths for I and D caches.
127
128	config ARC_HAS_ICACHE
129	bool "Use Instruction Cache"
130	default y
131
132	config ARC_HAS_DCACHE
133	bool "Use Data Cache"
134	default y
135
136	config ARC_CACHE_PAGES
137	bool "Per Page Cache Control"
138	default y
139	depends on ARC_HAS_ICACHE \|\| ARC_HAS_DCACHE
140	help
141	This can be used to over-ride the global I/D Cache Enable on a
142	per-page basis (but only for pages accessed via MMU such as
143	Kernel Virtual address or User Virtual Address)
144	TLB entries have a per-page Cache Enable Bit.
145	Note that Global I/D ENABLE + Per Page DISABLE works but corollary
146	Global DISABLE + Per Page ENABLE won't work
147
148	endif #ARC_CACHE
149
150	config ARC_HAS_HW_MPY
151	bool "Use Hardware Multiplier (Normal or Faster XMAC)"
152	default y
153	help
154	Influences how gcc generates code for MPY operations.
155	If enabled, MPYxx insns are generated, provided by Standard/XMAC
156	Multipler. Otherwise software multipy lib is used
157
158	choice
159	prompt "ARC700 MMU Version"
160	default ARC_MMU_V3 if ARC_CPU_770
161	default ARC_MMU_V2 if ARC_CPU_750D
162
163	config ARC_MMU_V1
164	bool "MMU v1"
165	help
166	Orig ARC700 MMU
167
168	config ARC_MMU_V2
169	bool "MMU v2"
170	help
171	Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
172	when 2 D-TLB and 1 I-TLB entries index into same 2way set.
173
174	config ARC_MMU_V3
175	bool "MMU v3"
176	depends on ARC_CPU_770
177	help
178	Introduced with ARC700 4.10: New Features
179	Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
180	Shared Address Spaces (SASID)
181
182	endchoice
183
184
185	choice
186	prompt "MMU Page Size"
187	default ARC_PAGE_SIZE_8K
188
189	config ARC_PAGE_SIZE_8K
190	bool "8KB"
191	help
192	Choose between 8k vs 16k
193
194	config ARC_PAGE_SIZE_16K
195	bool "16KB"
196	depends on ARC_MMU_V3
197
198	config ARC_PAGE_SIZE_4K
199	bool "4KB"
200	depends on ARC_MMU_V3
201
202	endchoice
203
204	config ARC_FPU_SAVE_RESTORE
205	bool "Enable FPU state persistence across context switch"
206	default n
207	help
208	Double Precision Floating Point unit had dedictaed regs which
209	need to be saved/restored across context-switch.
210	Note that ARC FPU is overly simplistic, unlike say x86, which has
211	hardware pieces to allow software to conditionally save/restore,
212	based on actual usage of FPU by a task. Thus our implemn does
213	this for all tasks in system.
214
215	menuconfig ARC_CPU_REL_4_10
216	bool "Enable support for Rel 4.10 features"
217	default n
218	help
219	-ARC770 (and dependent features) enabled
220	-ARC750 also shares some of the new features with 770
221
222	config ARC_HAS_LLSC
223	bool "Insn: LLOCK/SCOND (efficient atomic ops)"
224	default y
225	depends on ARC_CPU_770
226	# if SMP, enable LLSC ONLY if ARC implementation has coherent atomics
227	depends on !SMP \|\| ARC_HAS_COH_LLSC
228
229	config ARC_HAS_SWAPE
230	bool "Insn: SWAPE (endian-swap)"
231	default y
232	depends on ARC_CPU_REL_4_10
233
234	config ARC_HAS_RTSC
235	bool "Insn: RTSC (64-bit r/o cycle counter)"
236	default y
237	depends on ARC_CPU_REL_4_10
238
239	endmenu # "ARC CPU Configuration"
240
241	menu "Platform Board Configuration"
242
243	source "arch/arc/plat-arcfpga/Kconfig"
244
245	#New platform adds here
246
247	config ARC_PLAT_CLK
248	int "Clk speed in Hz"
249	default "80000000"
250
251	config LINUX_LINK_BASE
252	hex "Linux Link Address"
253	default "0x80000000"
254	help
255	ARC700 divides the 32 bit phy address space into two equal halves
256	-Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
257	-Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
258	Typically Linux kernel is linked at the start of untransalted addr,
259	hence the default value of 0x8zs.
260	However some customers have peripherals mapped at this addr, so
261	Linux needs to be scooted a bit.
262	If you don't know what the above means, leave this setting alone.
263
264	config ARC_PLAT_SDRAM_SIZE
265	hex "SD RAM Size"
266	default "0x10000000"
267	help
268	Implies the amount of SDRAM/DRAM Linux is going to claim/own.
269	The actual memory itself could be larger than this number. But for
270	all software purposes, this is the amt of memory.
271
272	endmenu # "Platform Board Configuration"
273
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
321	source "kernel/Kconfig.preempt"
322
323	endmenu # "ARC Architecture Configuration"
324
325	source "mm/Kconfig"
326	source "net/Kconfig"
327	source "drivers/Kconfig"
328	source "fs/Kconfig"
329	source "arch/arc/Kconfig.debug"
330	source "security/Kconfig"
331	source "crypto/Kconfig"
332	source "lib/Kconfig"