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Commit | Line | Data |
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8e1a6dd2 | 1 | # For a description of the syntax of this configuration file, |
e403149c | 2 | # see Documentation/kbuild/kconfig-language.txt. |
8e1a6dd2 CZ |
3 | |
4 | mainmenu "Linux/Xtensa Kernel Configuration" | |
5 | ||
6 | config FRAME_POINTER | |
35f9cd08 | 7 | def_bool n |
8e1a6dd2 | 8 | |
66701b14 | 9 | config ZONE_DMA |
35f9cd08 | 10 | def_bool y |
66701b14 | 11 | |
8e1a6dd2 | 12 | config XTENSA |
35f9cd08 | 13 | def_bool y |
ec7748b5 | 14 | select HAVE_IDE |
8e1a6dd2 CZ |
15 | help |
16 | Xtensa processors are 32-bit RISC machines designed by Tensilica | |
17 | primarily for embedded systems. These processors are both | |
18 | configurable and extensible. The Linux port to the Xtensa | |
19 | architecture supports all processor configurations and extensions, | |
20 | with reasonable minimum requirements. The Xtensa Linux project has | |
21 | a home page at <http://xtensa.sourceforge.net/>. | |
22 | ||
8e1a6dd2 | 23 | config RWSEM_XCHGADD_ALGORITHM |
35f9cd08 | 24 | def_bool y |
8e1a6dd2 | 25 | |
d4337aa5 | 26 | config GENERIC_FIND_NEXT_BIT |
35f9cd08 | 27 | def_bool y |
d4337aa5 AM |
28 | |
29 | config GENERIC_HWEIGHT | |
35f9cd08 | 30 | def_bool y |
d4337aa5 | 31 | |
8e1a6dd2 | 32 | config GENERIC_HARDIRQS |
35f9cd08 | 33 | def_bool y |
8e1a6dd2 | 34 | |
f0d1b0b3 | 35 | config ARCH_HAS_ILOG2_U32 |
35f9cd08 | 36 | def_bool n |
f0d1b0b3 DH |
37 | |
38 | config ARCH_HAS_ILOG2_U64 | |
35f9cd08 | 39 | def_bool n |
f0d1b0b3 | 40 | |
5ea81769 AV |
41 | config NO_IOPORT |
42 | def_bool y | |
43 | ||
bdc80787 PA |
44 | config HZ |
45 | int | |
46 | default 100 | |
47 | ||
8e1a6dd2 | 48 | source "init/Kconfig" |
dc52ddc0 | 49 | source "kernel/Kconfig.freezer" |
8e1a6dd2 | 50 | |
35f9cd08 JW |
51 | config MMU |
52 | def_bool n | |
53 | ||
4c0d2141 JW |
54 | config VARIANT_IRQ_SWITCH |
55 | def_bool n | |
56 | ||
8e1a6dd2 CZ |
57 | menu "Processor type and features" |
58 | ||
59 | choice | |
60 | prompt "Xtensa Processor Configuration" | |
173d6681 | 61 | default XTENSA_VARIANT_FSF |
8e1a6dd2 | 62 | |
173d6681 | 63 | config XTENSA_VARIANT_FSF |
0025427e | 64 | bool "fsf - default (not generic) configuration" |
35f9cd08 | 65 | select MMU |
0025427e CZ |
66 | |
67 | config XTENSA_VARIANT_DC232B | |
68 | bool "dc232b - Diamond 232L Standard Core Rev.B (LE)" | |
35f9cd08 | 69 | select MMU |
0025427e | 70 | help |
35f9cd08 | 71 | This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE). |
8e1a6dd2 CZ |
72 | endchoice |
73 | ||
8e1a6dd2 CZ |
74 | config XTENSA_UNALIGNED_USER |
75 | bool "Unaligned memory access in use space" | |
35f9cd08 JW |
76 | help |
77 | The Xtensa architecture currently does not handle unaligned | |
78 | memory accesses in hardware but through an exception handler. | |
79 | Per default, unaligned memory accesses are disabled in user space. | |
8e1a6dd2 | 80 | |
35f9cd08 | 81 | Say Y here to enable unaligned memory access in user space. |
8e1a6dd2 CZ |
82 | |
83 | config PREEMPT | |
84 | bool "Preemptible Kernel" | |
35f9cd08 JW |
85 | help |
86 | This option reduces the latency of the kernel when reacting to | |
87 | real-time or interactive events by allowing a low priority process to | |
88 | be preempted even if it is in kernel mode executing a system call. | |
89 | Unfortunately the kernel code has some race conditions if both | |
90 | CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is | |
91 | currently disabled if you are building an SMP kernel. | |
8e1a6dd2 | 92 | |
35f9cd08 JW |
93 | Say Y here if you are building a kernel for a desktop, embedded |
94 | or real-time system. Say N if you are unsure. | |
8e1a6dd2 CZ |
95 | |
96 | config MATH_EMULATION | |
97 | bool "Math emulation" | |
98 | help | |
99 | Can we use information of configuration file? | |
100 | ||
8e1a6dd2 CZ |
101 | endmenu |
102 | ||
35f9cd08 JW |
103 | config XTENSA_CALIBRATE_CCOUNT |
104 | def_bool n | |
105 | help | |
106 | On some platforms (XT2000, for example), the CPU clock rate can | |
107 | vary. The frequency can be determined, however, by measuring | |
108 | against a well known, fixed frequency, such as an UART oscillator. | |
109 | ||
110 | config SERIAL_CONSOLE | |
111 | def_bool n | |
112 | ||
113 | config XTENSA_ISS_NETWORK | |
114 | def_bool n | |
115 | ||
116 | menu "Bus options" | |
117 | ||
118 | config PCI | |
119 | bool "PCI support" | |
120 | default y | |
121 | help | |
122 | Find out whether you have a PCI motherboard. PCI is the name of a | |
123 | bus system, i.e. the way the CPU talks to the other stuff inside | |
124 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | |
125 | VESA. If you have PCI, say Y, otherwise N. | |
126 | ||
127 | source "drivers/pci/Kconfig" | |
128 | ||
8e1a6dd2 CZ |
129 | menu "Platform options" |
130 | ||
131 | choice | |
132 | prompt "Xtensa System Type" | |
133 | default XTENSA_PLATFORM_ISS | |
134 | ||
135 | config XTENSA_PLATFORM_ISS | |
136 | bool "ISS" | |
35f9cd08 JW |
137 | select XTENSA_CALIBRATE_CCOUNT |
138 | select SERIAL_CONSOLE | |
139 | select XTENSA_ISS_NETWORK | |
8e1a6dd2 CZ |
140 | help |
141 | ISS is an acronym for Tensilica's Instruction Set Simulator. | |
142 | ||
143 | config XTENSA_PLATFORM_XT2000 | |
144 | bool "XT2000" | |
35f9cd08 JW |
145 | select XTENSA_CALIBRATE_CCOUNT |
146 | select PCI | |
8e1a6dd2 CZ |
147 | help |
148 | XT2000 is the name of Tensilica's feature-rich emulation platform. | |
149 | This hardware is capable of running a full Linux distribution. | |
150 | ||
151 | endchoice | |
152 | ||
153 | ||
8e1a6dd2 CZ |
154 | config XTENSA_CPU_CLOCK |
155 | int "CPU clock rate [MHz]" | |
156 | depends on !XTENSA_CALIBRATE_CCOUNT | |
35f9cd08 | 157 | default 16 |
8e1a6dd2 CZ |
158 | |
159 | config GENERIC_CALIBRATE_DELAY | |
160 | bool "Auto calibration of the BogoMIPS value" | |
35f9cd08 | 161 | help |
82300bf4 | 162 | The BogoMIPS value can easily be derived from the CPU frequency. |
8e1a6dd2 CZ |
163 | |
164 | config CMDLINE_BOOL | |
165 | bool "Default bootloader kernel arguments" | |
166 | ||
167 | config CMDLINE | |
168 | string "Initial kernel command string" | |
169 | depends on CMDLINE_BOOL | |
170 | default "console=ttyS0,38400 root=/dev/ram" | |
171 | help | |
172 | On some architectures (EBSA110 and CATS), there is currently no way | |
173 | for the boot loader to pass arguments to the kernel. For these | |
174 | architectures, you should supply some command-line options at build | |
175 | time by entering them here. As a minimum, you should specify the | |
176 | memory size and the root device (e.g., mem=64M root=/dev/nfs). | |
177 | ||
82300bf4 CZ |
178 | source "mm/Kconfig" |
179 | ||
8e1a6dd2 CZ |
180 | endmenu |
181 | ||
35f9cd08 JW |
182 | config HOTPLUG |
183 | bool "Support for hot-pluggable devices" | |
8e1a6dd2 | 184 | help |
35f9cd08 JW |
185 | Say Y here if you want to plug devices into your computer while |
186 | the system is running, and be able to use them quickly. In many | |
187 | cases, the devices can likewise be unplugged at any time too. | |
8e1a6dd2 | 188 | |
35f9cd08 JW |
189 | One well known example of this is PCMCIA- or PC-cards, credit-card |
190 | size devices such as network cards, modems or hard drives which are | |
191 | plugged into slots found on all modern laptop computers. Another | |
192 | example, used on modern desktops as well as laptops, is USB. | |
8e1a6dd2 | 193 | |
35f9cd08 JW |
194 | Enable HOTPLUG and build a modular kernel. Get agent software |
195 | (from <http://linux-hotplug.sourceforge.net/>) and install it. | |
196 | Then your kernel will automatically call out to a user mode "policy | |
197 | agent" (/sbin/hotplug) to load modules and set up software needed | |
198 | to use devices as you hotplug them. | |
8e1a6dd2 CZ |
199 | |
200 | source "drivers/pcmcia/Kconfig" | |
201 | ||
202 | source "drivers/pci/hotplug/Kconfig" | |
203 | ||
204 | endmenu | |
205 | ||
cab00891 | 206 | menu "Executable file formats" |
8e1a6dd2 CZ |
207 | |
208 | # only elf supported | |
209 | config KCORE_ELF | |
35f9cd08 | 210 | def_bool y |
8e1a6dd2 | 211 | depends on PROC_FS |
8e1a6dd2 CZ |
212 | help |
213 | If you enabled support for /proc file system then the file | |
214 | /proc/kcore will contain the kernel core image in ELF format. This | |
215 | can be used in gdb: | |
216 | ||
217 | $ cd /usr/src/linux ; gdb vmlinux /proc/kcore | |
218 | ||
219 | This is especially useful if you have compiled the kernel with the | |
220 | "-g" option to preserve debugging information. It is mainly used | |
221 | for examining kernel data structures on the live kernel. | |
222 | ||
223 | source "fs/Kconfig.binfmt" | |
224 | ||
225 | endmenu | |
226 | ||
d5950b43 SR |
227 | source "net/Kconfig" |
228 | ||
8e1a6dd2 CZ |
229 | source "drivers/Kconfig" |
230 | ||
231 | source "fs/Kconfig" | |
232 | ||
233 | menu "Xtensa initrd options" | |
234 | depends on BLK_DEV_INITRD | |
235 | ||
35f9cd08 | 236 | config EMBEDDED_RAMDISK |
8e1a6dd2 CZ |
237 | bool "Embed root filesystem ramdisk into the kernel" |
238 | ||
239 | config EMBEDDED_RAMDISK_IMAGE | |
cab00891 | 240 | string "Filename of gzipped ramdisk image" |
8e1a6dd2 CZ |
241 | depends on EMBEDDED_RAMDISK |
242 | default "ramdisk.gz" | |
243 | help | |
244 | This is the filename of the ramdisk image to be built into the | |
245 | kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/. | |
246 | The ramdisk image is not part of the kernel distribution; you must | |
247 | provide one yourself. | |
248 | endmenu | |
249 | ||
250 | source "arch/xtensa/Kconfig.debug" | |
251 | ||
252 | source "security/Kconfig" | |
253 | ||
254 | source "crypto/Kconfig" | |
255 | ||
256 | source "lib/Kconfig" | |
257 | ||
258 |