Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 1 | # For a description of the syntax of this configuration file, |
Dirk Hohndel | e403149 | 2007-10-30 13:37:19 -0700 | [diff] [blame] | 2 | # see Documentation/kbuild/kconfig-language.txt. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 3 | |
| 4 | mainmenu "Linux/Xtensa Kernel Configuration" |
| 5 | |
| 6 | config FRAME_POINTER |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 7 | def_bool n |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 8 | |
Christoph Lameter | 66701b1 | 2007-02-10 01:43:09 -0800 | [diff] [blame] | 9 | config ZONE_DMA |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 10 | def_bool y |
Christoph Lameter | 66701b1 | 2007-02-10 01:43:09 -0800 | [diff] [blame] | 11 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 12 | config XTENSA |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 13 | def_bool y |
Sam Ravnborg | ec7748b | 2008-02-09 10:46:40 +0100 | [diff] [blame] | 14 | select HAVE_IDE |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 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 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 23 | config RWSEM_XCHGADD_ALGORITHM |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 24 | def_bool y |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 25 | |
Akinobu Mita | d4337aa | 2006-03-26 01:39:43 -0800 | [diff] [blame] | 26 | config GENERIC_FIND_NEXT_BIT |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 27 | def_bool y |
Akinobu Mita | d4337aa | 2006-03-26 01:39:43 -0800 | [diff] [blame] | 28 | |
| 29 | config GENERIC_HWEIGHT |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 30 | def_bool y |
Akinobu Mita | d4337aa | 2006-03-26 01:39:43 -0800 | [diff] [blame] | 31 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 32 | config GENERIC_HARDIRQS |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 33 | def_bool y |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 34 | |
Johannes Weiner | 000af2c | 2009-03-04 16:21:32 +0100 | [diff] [blame] | 35 | config GENERIC_GPIO |
| 36 | def_bool y |
| 37 | |
David Howells | f0d1b0b | 2006-12-08 02:37:49 -0800 | [diff] [blame] | 38 | config ARCH_HAS_ILOG2_U32 |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 39 | def_bool n |
David Howells | f0d1b0b | 2006-12-08 02:37:49 -0800 | [diff] [blame] | 40 | |
| 41 | config ARCH_HAS_ILOG2_U64 |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 42 | def_bool n |
David Howells | f0d1b0b | 2006-12-08 02:37:49 -0800 | [diff] [blame] | 43 | |
Al Viro | 5ea8176 | 2007-02-11 15:41:31 +0000 | [diff] [blame] | 44 | config NO_IOPORT |
| 45 | def_bool y |
| 46 | |
H. Peter Anvin | bdc8078 | 2008-02-08 04:21:26 -0800 | [diff] [blame] | 47 | config HZ |
| 48 | int |
| 49 | default 100 |
| 50 | |
Johannes Weiner | fcc8f0f | 2009-03-04 21:39:12 +0100 | [diff] [blame^] | 51 | config GENERIC_TIME |
| 52 | def_bool y |
| 53 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 54 | source "init/Kconfig" |
Matt Helsley | dc52ddc | 2008-10-18 20:27:21 -0700 | [diff] [blame] | 55 | source "kernel/Kconfig.freezer" |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 56 | |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 57 | config MMU |
| 58 | def_bool n |
| 59 | |
Johannes Weiner | 4c0d214 | 2009-03-04 16:21:31 +0100 | [diff] [blame] | 60 | config VARIANT_IRQ_SWITCH |
| 61 | def_bool n |
| 62 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 63 | menu "Processor type and features" |
| 64 | |
| 65 | choice |
| 66 | prompt "Xtensa Processor Configuration" |
Chris Zankel | 173d6681 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 67 | default XTENSA_VARIANT_FSF |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 68 | |
Chris Zankel | 173d6681 | 2006-12-10 02:18:48 -0800 | [diff] [blame] | 69 | config XTENSA_VARIANT_FSF |
Chris Zankel | 0025427 | 2008-10-21 09:11:43 -0700 | [diff] [blame] | 70 | bool "fsf - default (not generic) configuration" |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 71 | select MMU |
Chris Zankel | 0025427 | 2008-10-21 09:11:43 -0700 | [diff] [blame] | 72 | |
| 73 | config XTENSA_VARIANT_DC232B |
| 74 | bool "dc232b - Diamond 232L Standard Core Rev.B (LE)" |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 75 | select MMU |
Chris Zankel | 0025427 | 2008-10-21 09:11:43 -0700 | [diff] [blame] | 76 | help |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 77 | This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE). |
Johannes Weiner | 000af2c | 2009-03-04 16:21:32 +0100 | [diff] [blame] | 78 | |
| 79 | config XTENSA_VARIANT_S6000 |
| 80 | bool "s6000 - Stretch software configurable processor" |
| 81 | select VARIANT_IRQ_SWITCH |
| 82 | select ARCH_REQUIRE_GPIOLIB |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 83 | endchoice |
| 84 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 85 | config XTENSA_UNALIGNED_USER |
| 86 | bool "Unaligned memory access in use space" |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 87 | help |
| 88 | The Xtensa architecture currently does not handle unaligned |
| 89 | memory accesses in hardware but through an exception handler. |
| 90 | Per default, unaligned memory accesses are disabled in user space. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 91 | |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 92 | Say Y here to enable unaligned memory access in user space. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 93 | |
| 94 | config PREEMPT |
| 95 | bool "Preemptible Kernel" |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 96 | help |
| 97 | This option reduces the latency of the kernel when reacting to |
| 98 | real-time or interactive events by allowing a low priority process to |
| 99 | be preempted even if it is in kernel mode executing a system call. |
| 100 | Unfortunately the kernel code has some race conditions if both |
| 101 | CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is |
| 102 | currently disabled if you are building an SMP kernel. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 103 | |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 104 | Say Y here if you are building a kernel for a desktop, embedded |
| 105 | or real-time system. Say N if you are unsure. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 106 | |
| 107 | config MATH_EMULATION |
| 108 | bool "Math emulation" |
| 109 | help |
| 110 | Can we use information of configuration file? |
| 111 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 112 | endmenu |
| 113 | |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 114 | config XTENSA_CALIBRATE_CCOUNT |
| 115 | def_bool n |
| 116 | help |
| 117 | On some platforms (XT2000, for example), the CPU clock rate can |
| 118 | vary. The frequency can be determined, however, by measuring |
| 119 | against a well known, fixed frequency, such as an UART oscillator. |
| 120 | |
| 121 | config SERIAL_CONSOLE |
| 122 | def_bool n |
| 123 | |
| 124 | config XTENSA_ISS_NETWORK |
| 125 | def_bool n |
| 126 | |
| 127 | menu "Bus options" |
| 128 | |
| 129 | config PCI |
| 130 | bool "PCI support" |
| 131 | default y |
| 132 | help |
| 133 | Find out whether you have a PCI motherboard. PCI is the name of a |
| 134 | bus system, i.e. the way the CPU talks to the other stuff inside |
| 135 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or |
| 136 | VESA. If you have PCI, say Y, otherwise N. |
| 137 | |
| 138 | source "drivers/pci/Kconfig" |
| 139 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 140 | menu "Platform options" |
| 141 | |
| 142 | choice |
| 143 | prompt "Xtensa System Type" |
| 144 | default XTENSA_PLATFORM_ISS |
| 145 | |
| 146 | config XTENSA_PLATFORM_ISS |
| 147 | bool "ISS" |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 148 | select XTENSA_CALIBRATE_CCOUNT |
| 149 | select SERIAL_CONSOLE |
| 150 | select XTENSA_ISS_NETWORK |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 151 | help |
| 152 | ISS is an acronym for Tensilica's Instruction Set Simulator. |
| 153 | |
| 154 | config XTENSA_PLATFORM_XT2000 |
| 155 | bool "XT2000" |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 156 | select XTENSA_CALIBRATE_CCOUNT |
| 157 | select PCI |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 158 | help |
| 159 | XT2000 is the name of Tensilica's feature-rich emulation platform. |
| 160 | This hardware is capable of running a full Linux distribution. |
| 161 | |
Johannes Weiner | f82e939 | 2009-03-04 16:21:33 +0100 | [diff] [blame] | 162 | config XTENSA_PLATFORM_S6105 |
| 163 | bool "S6105" |
| 164 | select SERIAL_CONSOLE |
| 165 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 166 | endchoice |
| 167 | |
| 168 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 169 | config XTENSA_CPU_CLOCK |
| 170 | int "CPU clock rate [MHz]" |
| 171 | depends on !XTENSA_CALIBRATE_CCOUNT |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 172 | default 16 |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 173 | |
| 174 | config GENERIC_CALIBRATE_DELAY |
| 175 | bool "Auto calibration of the BogoMIPS value" |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 176 | help |
Chris Zankel | 82300bf | 2005-06-30 02:58:58 -0700 | [diff] [blame] | 177 | The BogoMIPS value can easily be derived from the CPU frequency. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 178 | |
| 179 | config CMDLINE_BOOL |
| 180 | bool "Default bootloader kernel arguments" |
| 181 | |
| 182 | config CMDLINE |
| 183 | string "Initial kernel command string" |
| 184 | depends on CMDLINE_BOOL |
| 185 | default "console=ttyS0,38400 root=/dev/ram" |
| 186 | help |
| 187 | On some architectures (EBSA110 and CATS), there is currently no way |
| 188 | for the boot loader to pass arguments to the kernel. For these |
| 189 | architectures, you should supply some command-line options at build |
| 190 | time by entering them here. As a minimum, you should specify the |
| 191 | memory size and the root device (e.g., mem=64M root=/dev/nfs). |
| 192 | |
Chris Zankel | 82300bf | 2005-06-30 02:58:58 -0700 | [diff] [blame] | 193 | source "mm/Kconfig" |
| 194 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 195 | endmenu |
| 196 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 197 | config HOTPLUG |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 198 | bool "Support for hot-pluggable devices" |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 199 | help |
| 200 | Say Y here if you want to plug devices into your computer while |
| 201 | the system is running, and be able to use them quickly. In many |
| 202 | cases, the devices can likewise be unplugged at any time too. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 203 | |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 204 | One well known example of this is PCMCIA- or PC-cards, credit-card |
| 205 | size devices such as network cards, modems or hard drives which are |
| 206 | plugged into slots found on all modern laptop computers. Another |
| 207 | example, used on modern desktops as well as laptops, is USB. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 208 | |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 209 | Enable HOTPLUG and build a modular kernel. Get agent software |
| 210 | (from <http://linux-hotplug.sourceforge.net/>) and install it. |
| 211 | Then your kernel will automatically call out to a user mode "policy |
| 212 | agent" (/sbin/hotplug) to load modules and set up software needed |
| 213 | to use devices as you hotplug them. |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 214 | |
| 215 | source "drivers/pcmcia/Kconfig" |
| 216 | |
| 217 | source "drivers/pci/hotplug/Kconfig" |
| 218 | |
| 219 | endmenu |
| 220 | |
Matt LaPlante | cab0089 | 2006-10-03 22:36:44 +0200 | [diff] [blame] | 221 | menu "Executable file formats" |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 222 | |
| 223 | # only elf supported |
| 224 | config KCORE_ELF |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 225 | def_bool y |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 226 | depends on PROC_FS |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 227 | help |
| 228 | If you enabled support for /proc file system then the file |
| 229 | /proc/kcore will contain the kernel core image in ELF format. This |
| 230 | can be used in gdb: |
| 231 | |
| 232 | $ cd /usr/src/linux ; gdb vmlinux /proc/kcore |
| 233 | |
| 234 | This is especially useful if you have compiled the kernel with the |
| 235 | "-g" option to preserve debugging information. It is mainly used |
| 236 | for examining kernel data structures on the live kernel. |
| 237 | |
| 238 | source "fs/Kconfig.binfmt" |
| 239 | |
| 240 | endmenu |
| 241 | |
Sam Ravnborg | d5950b4 | 2005-07-11 21:03:49 -0700 | [diff] [blame] | 242 | source "net/Kconfig" |
| 243 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 244 | source "drivers/Kconfig" |
| 245 | |
| 246 | source "fs/Kconfig" |
| 247 | |
| 248 | menu "Xtensa initrd options" |
| 249 | depends on BLK_DEV_INITRD |
| 250 | |
Johannes Weiner | 35f9cd0 | 2009-03-04 16:21:28 +0100 | [diff] [blame] | 251 | config EMBEDDED_RAMDISK |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 252 | bool "Embed root filesystem ramdisk into the kernel" |
| 253 | |
| 254 | config EMBEDDED_RAMDISK_IMAGE |
Matt LaPlante | cab0089 | 2006-10-03 22:36:44 +0200 | [diff] [blame] | 255 | string "Filename of gzipped ramdisk image" |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 256 | depends on EMBEDDED_RAMDISK |
| 257 | default "ramdisk.gz" |
| 258 | help |
| 259 | This is the filename of the ramdisk image to be built into the |
| 260 | kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/. |
| 261 | The ramdisk image is not part of the kernel distribution; you must |
| 262 | provide one yourself. |
| 263 | endmenu |
| 264 | |
Chris Zankel | 8e1a6dd | 2005-06-23 22:01:10 -0700 | [diff] [blame] | 265 | source "arch/xtensa/Kconfig.debug" |
| 266 | |
| 267 | source "security/Kconfig" |
| 268 | |
| 269 | source "crypto/Kconfig" |
| 270 | |
| 271 | source "lib/Kconfig" |
| 272 | |
| 273 | |