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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 | |
7 | bool | |
8 | default n | |
9 | ||
66701b14 CL |
10 | config ZONE_DMA |
11 | bool | |
12 | default y | |
13 | ||
8e1a6dd2 CZ |
14 | config XTENSA |
15 | bool | |
16 | default y | |
ec7748b5 | 17 | select HAVE_IDE |
8e1a6dd2 CZ |
18 | help |
19 | Xtensa processors are 32-bit RISC machines designed by Tensilica | |
20 | primarily for embedded systems. These processors are both | |
21 | configurable and extensible. The Linux port to the Xtensa | |
22 | architecture supports all processor configurations and extensions, | |
23 | with reasonable minimum requirements. The Xtensa Linux project has | |
24 | a home page at <http://xtensa.sourceforge.net/>. | |
25 | ||
8e1a6dd2 CZ |
26 | config RWSEM_XCHGADD_ALGORITHM |
27 | bool | |
28 | default y | |
29 | ||
d4337aa5 AM |
30 | config GENERIC_FIND_NEXT_BIT |
31 | bool | |
32 | default y | |
33 | ||
34 | config GENERIC_HWEIGHT | |
35 | bool | |
36 | default y | |
37 | ||
8e1a6dd2 CZ |
38 | config GENERIC_HARDIRQS |
39 | bool | |
40 | default y | |
41 | ||
f0d1b0b3 DH |
42 | config ARCH_HAS_ILOG2_U32 |
43 | bool | |
44 | default n | |
45 | ||
46 | config ARCH_HAS_ILOG2_U64 | |
47 | bool | |
48 | default n | |
49 | ||
5ea81769 AV |
50 | config NO_IOPORT |
51 | def_bool y | |
52 | ||
bdc80787 PA |
53 | config HZ |
54 | int | |
55 | default 100 | |
56 | ||
8e1a6dd2 | 57 | source "init/Kconfig" |
dc52ddc0 | 58 | source "kernel/Kconfig.freezer" |
8e1a6dd2 CZ |
59 | |
60 | menu "Processor type and features" | |
61 | ||
62 | choice | |
63 | prompt "Xtensa Processor Configuration" | |
173d6681 | 64 | default XTENSA_VARIANT_FSF |
8e1a6dd2 | 65 | |
173d6681 CZ |
66 | config XTENSA_VARIANT_FSF |
67 | bool "fsf" | |
8e1a6dd2 CZ |
68 | endchoice |
69 | ||
70 | config MMU | |
71 | bool | |
72 | default y | |
73 | ||
74 | config XTENSA_UNALIGNED_USER | |
75 | bool "Unaligned memory access in use space" | |
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. | |
80 | ||
81 | Say Y here to enable unaligned memory access in user space. | |
82 | ||
83 | config PREEMPT | |
84 | bool "Preemptible Kernel" | |
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. | |
92 | ||
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. | |
95 | ||
96 | config MATH_EMULATION | |
97 | bool "Math emulation" | |
98 | help | |
99 | Can we use information of configuration file? | |
100 | ||
101 | config HIGHMEM | |
102 | bool "High memory support" | |
103 | ||
104 | endmenu | |
105 | ||
106 | menu "Platform options" | |
107 | ||
108 | choice | |
109 | prompt "Xtensa System Type" | |
110 | default XTENSA_PLATFORM_ISS | |
111 | ||
112 | config XTENSA_PLATFORM_ISS | |
113 | bool "ISS" | |
114 | help | |
115 | ISS is an acronym for Tensilica's Instruction Set Simulator. | |
116 | ||
117 | config XTENSA_PLATFORM_XT2000 | |
118 | bool "XT2000" | |
119 | help | |
120 | XT2000 is the name of Tensilica's feature-rich emulation platform. | |
121 | This hardware is capable of running a full Linux distribution. | |
122 | ||
123 | endchoice | |
124 | ||
125 | ||
126 | config XTENSA_CALIBRATE_CCOUNT | |
127 | bool "Auto calibration of the CPU clock rate" | |
128 | ---help--- | |
129 | On some platforms (XT2000, for example), the CPU clock rate can | |
130 | vary. The frequency can be determined, however, by measuring | |
131 | against a well known, fixed frequency, such as an UART oscillator. | |
132 | ||
133 | config XTENSA_CPU_CLOCK | |
134 | int "CPU clock rate [MHz]" | |
135 | depends on !XTENSA_CALIBRATE_CCOUNT | |
136 | default "16" | |
137 | ||
138 | config GENERIC_CALIBRATE_DELAY | |
139 | bool "Auto calibration of the BogoMIPS value" | |
140 | ---help--- | |
82300bf4 | 141 | The BogoMIPS value can easily be derived from the CPU frequency. |
8e1a6dd2 CZ |
142 | |
143 | config CMDLINE_BOOL | |
144 | bool "Default bootloader kernel arguments" | |
145 | ||
146 | config CMDLINE | |
147 | string "Initial kernel command string" | |
148 | depends on CMDLINE_BOOL | |
149 | default "console=ttyS0,38400 root=/dev/ram" | |
150 | help | |
151 | On some architectures (EBSA110 and CATS), there is currently no way | |
152 | for the boot loader to pass arguments to the kernel. For these | |
153 | architectures, you should supply some command-line options at build | |
154 | time by entering them here. As a minimum, you should specify the | |
155 | memory size and the root device (e.g., mem=64M root=/dev/nfs). | |
156 | ||
157 | config SERIAL_CONSOLE | |
158 | bool | |
159 | depends on XTENSA_PLATFORM_ISS | |
160 | default y | |
161 | ||
162 | config XTENSA_ISS_NETWORK | |
163 | bool | |
164 | depends on XTENSA_PLATFORM_ISS | |
165 | default y | |
166 | ||
82300bf4 CZ |
167 | source "mm/Kconfig" |
168 | ||
8e1a6dd2 CZ |
169 | endmenu |
170 | ||
171 | menu "Bus options" | |
172 | ||
173 | config PCI | |
174 | bool "PCI support" if !XTENSA_PLATFORM_ISS | |
175 | depends on !XTENSA_PLATFORM_ISS | |
176 | default y | |
177 | help | |
178 | Find out whether you have a PCI motherboard. PCI is the name of a | |
179 | bus system, i.e. the way the CPU talks to the other stuff inside | |
180 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | |
181 | VESA. If you have PCI, say Y, otherwise N. | |
182 | ||
8e1a6dd2 CZ |
183 | source "drivers/pci/Kconfig" |
184 | ||
185 | config HOTPLUG | |
186 | ||
187 | bool "Support for hot-pluggable devices" | |
188 | ---help--- | |
189 | Say Y here if you want to plug devices into your computer while | |
190 | the system is running, and be able to use them quickly. In many | |
191 | cases, the devices can likewise be unplugged at any time too. | |
192 | ||
193 | One well known example of this is PCMCIA- or PC-cards, credit-card | |
194 | size devices such as network cards, modems or hard drives which are | |
195 | plugged into slots found on all modern laptop computers. Another | |
196 | example, used on modern desktops as well as laptops, is USB. | |
197 | ||
a81792f6 JB |
198 | Enable HOTPLUG and build a modular kernel. Get agent software |
199 | (from <http://linux-hotplug.sourceforge.net/>) and install it. | |
8e1a6dd2 CZ |
200 | Then your kernel will automatically call out to a user mode "policy |
201 | agent" (/sbin/hotplug) to load modules and set up software needed | |
202 | to use devices as you hotplug them. | |
203 | ||
204 | source "drivers/pcmcia/Kconfig" | |
205 | ||
206 | source "drivers/pci/hotplug/Kconfig" | |
207 | ||
208 | endmenu | |
209 | ||
cab00891 | 210 | menu "Executable file formats" |
8e1a6dd2 CZ |
211 | |
212 | # only elf supported | |
213 | config KCORE_ELF | |
214 | bool | |
215 | depends on PROC_FS | |
216 | default y | |
217 | help | |
218 | If you enabled support for /proc file system then the file | |
219 | /proc/kcore will contain the kernel core image in ELF format. This | |
220 | can be used in gdb: | |
221 | ||
222 | $ cd /usr/src/linux ; gdb vmlinux /proc/kcore | |
223 | ||
224 | This is especially useful if you have compiled the kernel with the | |
225 | "-g" option to preserve debugging information. It is mainly used | |
226 | for examining kernel data structures on the live kernel. | |
227 | ||
228 | source "fs/Kconfig.binfmt" | |
229 | ||
230 | endmenu | |
231 | ||
d5950b43 SR |
232 | source "net/Kconfig" |
233 | ||
8e1a6dd2 CZ |
234 | source "drivers/Kconfig" |
235 | ||
236 | source "fs/Kconfig" | |
237 | ||
238 | menu "Xtensa initrd options" | |
239 | depends on BLK_DEV_INITRD | |
240 | ||
241 | config EMBEDDED_RAMDISK | |
242 | bool "Embed root filesystem ramdisk into the kernel" | |
243 | ||
244 | config EMBEDDED_RAMDISK_IMAGE | |
cab00891 | 245 | string "Filename of gzipped ramdisk image" |
8e1a6dd2 CZ |
246 | depends on EMBEDDED_RAMDISK |
247 | default "ramdisk.gz" | |
248 | help | |
249 | This is the filename of the ramdisk image to be built into the | |
250 | kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/. | |
251 | The ramdisk image is not part of the kernel distribution; you must | |
252 | provide one yourself. | |
253 | endmenu | |
254 | ||
255 | source "arch/xtensa/Kconfig.debug" | |
256 | ||
257 | source "security/Kconfig" | |
258 | ||
259 | source "crypto/Kconfig" | |
260 | ||
261 | source "lib/Kconfig" | |
262 | ||
263 |