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 HAVE_VIRT_TO_BUS 13 select GENERIC_IRQ_SHOW 14 select GENERIC_CPU_DEVICES 15 select MODULES_USE_ELF_RELA 16 select GENERIC_PCI_IOMAP 17 select ARCH_WANT_IPC_PARSE_VERSION 18 select ARCH_WANT_OPTIONAL_GPIOLIB 19 select CLONE_BACKWARDS 20 select IRQ_DOMAIN 21 select HAVE_OPROFILE 22 help 23 Xtensa processors are 32-bit RISC machines designed by Tensilica 24 primarily for embedded systems. These processors are both 25 configurable and extensible. The Linux port to the Xtensa 26 architecture supports all processor configurations and extensions, 27 with reasonable minimum requirements. The Xtensa Linux project has 28 a home page at <http://www.linux-xtensa.org/>. 29 30config RWSEM_XCHGADD_ALGORITHM 31 def_bool y 32 33config GENERIC_HWEIGHT 34 def_bool y 35 36config GENERIC_GPIO 37 bool 38 39config ARCH_HAS_ILOG2_U32 40 def_bool n 41 42config ARCH_HAS_ILOG2_U64 43 def_bool n 44 45config NO_IOPORT 46 def_bool n 47 48config HZ 49 int 50 default 100 51 52source "init/Kconfig" 53source "kernel/Kconfig.freezer" 54 55config MMU 56 def_bool n 57 58config VARIANT_IRQ_SWITCH 59 def_bool n 60 61menu "Processor type and features" 62 63choice 64 prompt "Xtensa Processor Configuration" 65 default XTENSA_VARIANT_FSF 66 67config XTENSA_VARIANT_FSF 68 bool "fsf - default (not generic) configuration" 69 select MMU 70 71config XTENSA_VARIANT_DC232B 72 bool "dc232b - Diamond 232L Standard Core Rev.B (LE)" 73 select MMU 74 help 75 This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE). 76 77config XTENSA_VARIANT_DC233C 78 bool "dc233c - Diamond 233L Standard Core Rev.C (LE)" 79 select MMU 80 help 81 This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE). 82 83config XTENSA_VARIANT_S6000 84 bool "s6000 - Stretch software configurable processor" 85 select VARIANT_IRQ_SWITCH 86 select ARCH_REQUIRE_GPIOLIB 87 select XTENSA_CALIBRATE_CCOUNT 88endchoice 89 90config XTENSA_UNALIGNED_USER 91 bool "Unaligned memory access in use space" 92 help 93 The Xtensa architecture currently does not handle unaligned 94 memory accesses in hardware but through an exception handler. 95 Per default, unaligned memory accesses are disabled in user space. 96 97 Say Y here to enable unaligned memory access in user space. 98 99source "kernel/Kconfig.preempt" 100 101config MATH_EMULATION 102 bool "Math emulation" 103 help 104 Can we use information of configuration file? 105 106endmenu 107 108config XTENSA_CALIBRATE_CCOUNT 109 def_bool n 110 help 111 On some platforms (XT2000, for example), the CPU clock rate can 112 vary. The frequency can be determined, however, by measuring 113 against a well known, fixed frequency, such as an UART oscillator. 114 115config SERIAL_CONSOLE 116 def_bool n 117 118config XTENSA_ISS_NETWORK 119 def_bool n 120 121menu "Bus options" 122 123config PCI 124 bool "PCI support" 125 default y 126 help 127 Find out whether you have a PCI motherboard. PCI is the name of a 128 bus system, i.e. the way the CPU talks to the other stuff inside 129 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 130 VESA. If you have PCI, say Y, otherwise N. 131 132source "drivers/pci/Kconfig" 133 134endmenu 135 136menu "Platform options" 137 138choice 139 prompt "Xtensa System Type" 140 default XTENSA_PLATFORM_ISS 141 142config XTENSA_PLATFORM_ISS 143 bool "ISS" 144 depends on TTY 145 select XTENSA_CALIBRATE_CCOUNT 146 select SERIAL_CONSOLE 147 select XTENSA_ISS_NETWORK 148 help 149 ISS is an acronym for Tensilica's Instruction Set Simulator. 150 151config XTENSA_PLATFORM_XT2000 152 bool "XT2000" 153 help 154 XT2000 is the name of Tensilica's feature-rich emulation platform. 155 This hardware is capable of running a full Linux distribution. 156 157config XTENSA_PLATFORM_S6105 158 bool "S6105" 159 select SERIAL_CONSOLE 160 select NO_IOPORT 161 162config XTENSA_PLATFORM_XTFPGA 163 bool "XTFPGA" 164 select SERIAL_CONSOLE 165 select ETHOC 166 select XTENSA_CALIBRATE_CCOUNT 167 help 168 XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605). 169 This hardware is capable of running a full Linux distribution. 170 171endchoice 172 173 174config XTENSA_CPU_CLOCK 175 int "CPU clock rate [MHz]" 176 depends on !XTENSA_CALIBRATE_CCOUNT 177 default 16 178 179config GENERIC_CALIBRATE_DELAY 180 bool "Auto calibration of the BogoMIPS value" 181 help 182 The BogoMIPS value can easily be derived from the CPU frequency. 183 184config CMDLINE_BOOL 185 bool "Default bootloader kernel arguments" 186 187config CMDLINE 188 string "Initial kernel command string" 189 depends on CMDLINE_BOOL 190 default "console=ttyS0,38400 root=/dev/ram" 191 help 192 On some architectures (EBSA110 and CATS), there is currently no way 193 for the boot loader to pass arguments to the kernel. For these 194 architectures, you should supply some command-line options at build 195 time by entering them here. As a minimum, you should specify the 196 memory size and the root device (e.g., mem=64M root=/dev/nfs). 197 198config USE_OF 199 bool "Flattened Device Tree support" 200 select OF 201 select OF_EARLY_FLATTREE 202 help 203 Include support for flattened device tree machine descriptions. 204 205config BUILTIN_DTB 206 string "DTB to build into the kernel image" 207 depends on OF 208 209config BLK_DEV_SIMDISK 210 tristate "Host file-based simulated block device support" 211 default n 212 depends on XTENSA_PLATFORM_ISS 213 help 214 Create block devices that map to files in the host file system. 215 Device binding to host file may be changed at runtime via proc 216 interface provided the device is not in use. 217 218config BLK_DEV_SIMDISK_COUNT 219 int "Number of host file-based simulated block devices" 220 range 1 10 221 depends on BLK_DEV_SIMDISK 222 default 2 223 help 224 This is the default minimal number of created block devices. 225 Kernel/module parameter 'simdisk_count' may be used to change this 226 value at runtime. More file names (but no more than 10) may be 227 specified as parameters, simdisk_count grows accordingly. 228 229config SIMDISK0_FILENAME 230 string "Host filename for the first simulated device" 231 depends on BLK_DEV_SIMDISK = y 232 default "" 233 help 234 Attach a first simdisk to a host file. Conventionally, this file 235 contains a root file system. 236 237config SIMDISK1_FILENAME 238 string "Host filename for the second simulated device" 239 depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1 240 default "" 241 help 242 Another simulated disk in a host file for a buildroot-independent 243 storage. 244 245source "mm/Kconfig" 246 247source "drivers/pcmcia/Kconfig" 248 249source "drivers/pci/hotplug/Kconfig" 250 251endmenu 252 253menu "Executable file formats" 254 255# only elf supported 256config KCORE_ELF 257 def_bool y 258 depends on PROC_FS 259 help 260 If you enabled support for /proc file system then the file 261 /proc/kcore will contain the kernel core image in ELF format. This 262 can be used in gdb: 263 264 $ cd /usr/src/linux ; gdb vmlinux /proc/kcore 265 266 This is especially useful if you have compiled the kernel with the 267 "-g" option to preserve debugging information. It is mainly used 268 for examining kernel data structures on the live kernel. 269 270source "fs/Kconfig.binfmt" 271 272endmenu 273 274source "net/Kconfig" 275 276source "drivers/Kconfig" 277 278source "fs/Kconfig" 279 280source "arch/xtensa/Kconfig.debug" 281 282source "security/Kconfig" 283 284source "crypto/Kconfig" 285 286source "lib/Kconfig" 287 288 289