xref: /openbmc/linux/arch/xtensa/Kconfig (revision b6bec26c) 
1config FRAME_POINTER
2	def_bool n
3
4config ZONE_DMA
5	def_bool y
6
7config XTENSA
8	def_bool y
9	select HAVE_IDE
10	select GENERIC_ATOMIC64
11	select HAVE_GENERIC_HARDIRQS
12	select GENERIC_IRQ_SHOW
13	select GENERIC_CPU_DEVICES
14	select MODULES_USE_ELF_RELA
15	select GENERIC_PCI_IOMAP
16	select ARCH_WANT_OPTIONAL_GPIOLIB
17	select CLONE_BACKWARDS
18	select IRQ_DOMAIN
19	help
20	  Xtensa processors are 32-bit RISC machines designed by Tensilica
21	  primarily for embedded systems.  These processors are both
22	  configurable and extensible.  The Linux port to the Xtensa
23	  architecture supports all processor configurations and extensions,
24	  with reasonable minimum requirements.  The Xtensa Linux project has
25	  a home page at <http://xtensa.sourceforge.net/>.
26
27config RWSEM_XCHGADD_ALGORITHM
28	def_bool y
29
30config GENERIC_HWEIGHT
31	def_bool y
32
33config GENERIC_GPIO
34	def_bool y
35
36config ARCH_HAS_ILOG2_U32
37	def_bool n
38
39config ARCH_HAS_ILOG2_U64
40	def_bool n
41
42config NO_IOPORT
43	def_bool n
44
45config HZ
46	int
47	default 100
48
49source "init/Kconfig"
50source "kernel/Kconfig.freezer"
51
52config MMU
53	def_bool n
54
55config VARIANT_IRQ_SWITCH
56	def_bool n
57
58menu "Processor type and features"
59
60choice
61	prompt "Xtensa Processor Configuration"
62	default XTENSA_VARIANT_FSF
63
64config XTENSA_VARIANT_FSF
65	bool "fsf - default (not generic) configuration"
66	select MMU
67
68config XTENSA_VARIANT_DC232B
69	bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
70	select MMU
71	help
72	  This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
73
74config XTENSA_VARIANT_S6000
75	bool "s6000 - Stretch software configurable processor"
76	select VARIANT_IRQ_SWITCH
77	select ARCH_REQUIRE_GPIOLIB
78	select XTENSA_CALIBRATE_CCOUNT
79endchoice
80
81config XTENSA_UNALIGNED_USER
82	bool "Unaligned memory access in use space"
83	help
84	  The Xtensa architecture currently does not handle unaligned
85	  memory accesses in hardware but through an exception handler.
86	  Per default, unaligned memory accesses are disabled in user space.
87
88	  Say Y here to enable unaligned memory access in user space.
89
90source "kernel/Kconfig.preempt"
91
92config MATH_EMULATION
93	bool "Math emulation"
94	help
95	Can we use information of configuration file?
96
97endmenu
98
99config XTENSA_CALIBRATE_CCOUNT
100	def_bool n
101	help
102	  On some platforms (XT2000, for example), the CPU clock rate can
103	  vary.  The frequency can be determined, however, by measuring
104	  against a well known, fixed frequency, such as an UART oscillator.
105
106config SERIAL_CONSOLE
107	def_bool n
108
109config XTENSA_ISS_NETWORK
110	def_bool n
111
112menu "Bus options"
113
114config PCI
115	bool "PCI support"
116	default y
117	help
118	  Find out whether you have a PCI motherboard. PCI is the name of a
119	  bus system, i.e. the way the CPU talks to the other stuff inside
120	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
121	  VESA. If you have PCI, say Y, otherwise N.
122
123source "drivers/pci/Kconfig"
124
125endmenu
126
127menu "Platform options"
128
129choice
130	prompt "Xtensa System Type"
131	default XTENSA_PLATFORM_ISS
132
133config XTENSA_PLATFORM_ISS
134	bool "ISS"
135	select XTENSA_CALIBRATE_CCOUNT
136	select SERIAL_CONSOLE
137	select XTENSA_ISS_NETWORK
138	help
139	  ISS is an acronym for Tensilica's Instruction Set Simulator.
140
141config XTENSA_PLATFORM_XT2000
142	bool "XT2000"
143	help
144	  XT2000 is the name of Tensilica's feature-rich emulation platform.
145	  This hardware is capable of running a full Linux distribution.
146
147config XTENSA_PLATFORM_S6105
148	bool "S6105"
149	select SERIAL_CONSOLE
150	select NO_IOPORT
151
152config XTENSA_PLATFORM_XTFPGA
153	bool "XTFPGA"
154	select SERIAL_CONSOLE
155	select ETHOC
156	select XTENSA_CALIBRATE_CCOUNT
157	help
158	  XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
159	  This hardware is capable of running a full Linux distribution.
160
161endchoice
162
163
164config XTENSA_CPU_CLOCK
165	int "CPU clock rate [MHz]"
166	depends on !XTENSA_CALIBRATE_CCOUNT
167	default 16
168
169config GENERIC_CALIBRATE_DELAY
170	bool "Auto calibration of the BogoMIPS value"
171	help
172	  The BogoMIPS value can easily be derived from the CPU frequency.
173
174config CMDLINE_BOOL
175	bool "Default bootloader kernel arguments"
176
177config CMDLINE
178	string "Initial kernel command string"
179	depends on CMDLINE_BOOL
180	default "console=ttyS0,38400 root=/dev/ram"
181	help
182	  On some architectures (EBSA110 and CATS), there is currently no way
183	  for the boot loader to pass arguments to the kernel. For these
184	  architectures, you should supply some command-line options at build
185	  time by entering them here. As a minimum, you should specify the
186	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
187
188config USE_OF
189	bool "Flattened Device Tree support"
190	select OF
191	select OF_EARLY_FLATTREE
192	help
193	  Include support for flattened device tree machine descriptions.
194
195config BUILTIN_DTB
196	string "DTB to build into the kernel image"
197	depends on OF
198
199source "mm/Kconfig"
200
201source "drivers/pcmcia/Kconfig"
202
203source "drivers/pci/hotplug/Kconfig"
204
205endmenu
206
207menu "Executable file formats"
208
209# only elf supported
210config KCORE_ELF
211	def_bool y
212        depends on PROC_FS
213        help
214          If you enabled support for /proc file system then the file
215          /proc/kcore will contain the kernel core image in ELF format. This
216          can be used in gdb:
217
218          $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
219
220          This is especially useful if you have compiled the kernel with the
221          "-g" option to preserve debugging information. It is mainly used
222	  for examining kernel data structures on the live kernel.
223
224source "fs/Kconfig.binfmt"
225
226endmenu
227
228source "net/Kconfig"
229
230source "drivers/Kconfig"
231
232source "fs/Kconfig"
233
234source "arch/xtensa/Kconfig.debug"
235
236source "security/Kconfig"
237
238source "crypto/Kconfig"
239
240source "lib/Kconfig"
241
242
243