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 GENERIC_KERNEL_THREAD
17 select GENERIC_KERNEL_EXECVE
18 select ARCH_WANT_OPTIONAL_GPIOLIB
19 select CLONE_BACKWARDS
21 Xtensa processors are 32-bit RISC machines designed by Tensilica
22 primarily for embedded systems. These processors are both
23 configurable and extensible. The Linux port to the Xtensa
24 architecture supports all processor configurations and extensions,
25 with reasonable minimum requirements. The Xtensa Linux project has
26 a home page at <http://xtensa.sourceforge.net/>.
28 config RWSEM_XCHGADD_ALGORITHM
31 config GENERIC_HWEIGHT
37 config ARCH_HAS_ILOG2_U32
40 config ARCH_HAS_ILOG2_U64
51 source "kernel/Kconfig.freezer"
56 config VARIANT_IRQ_SWITCH
59 menu "Processor type and features"
62 prompt "Xtensa Processor Configuration"
63 default XTENSA_VARIANT_FSF
65 config XTENSA_VARIANT_FSF
66 bool "fsf - default (not generic) configuration"
69 config XTENSA_VARIANT_DC232B
70 bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
73 This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
75 config XTENSA_VARIANT_S6000
76 bool "s6000 - Stretch software configurable processor"
77 select VARIANT_IRQ_SWITCH
78 select ARCH_REQUIRE_GPIOLIB
79 select XTENSA_CALIBRATE_CCOUNT
82 config XTENSA_UNALIGNED_USER
83 bool "Unaligned memory access in use space"
85 The Xtensa architecture currently does not handle unaligned
86 memory accesses in hardware but through an exception handler.
87 Per default, unaligned memory accesses are disabled in user space.
89 Say Y here to enable unaligned memory access in user space.
91 source "kernel/Kconfig.preempt"
96 Can we use information of configuration file?
100 config XTENSA_CALIBRATE_CCOUNT
103 On some platforms (XT2000, for example), the CPU clock rate can
104 vary. The frequency can be determined, however, by measuring
105 against a well known, fixed frequency, such as an UART oscillator.
107 config SERIAL_CONSOLE
110 config XTENSA_ISS_NETWORK
119 Find out whether you have a PCI motherboard. PCI is the name of a
120 bus system, i.e. the way the CPU talks to the other stuff inside
121 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
122 VESA. If you have PCI, say Y, otherwise N.
124 source "drivers/pci/Kconfig"
128 menu "Platform options"
131 prompt "Xtensa System Type"
132 default XTENSA_PLATFORM_ISS
134 config XTENSA_PLATFORM_ISS
136 select XTENSA_CALIBRATE_CCOUNT
137 select SERIAL_CONSOLE
138 select XTENSA_ISS_NETWORK
140 ISS is an acronym for Tensilica's Instruction Set Simulator.
142 config XTENSA_PLATFORM_XT2000
145 XT2000 is the name of Tensilica's feature-rich emulation platform.
146 This hardware is capable of running a full Linux distribution.
148 config XTENSA_PLATFORM_S6105
150 select SERIAL_CONSOLE
156 config XTENSA_CPU_CLOCK
157 int "CPU clock rate [MHz]"
158 depends on !XTENSA_CALIBRATE_CCOUNT
161 config GENERIC_CALIBRATE_DELAY
162 bool "Auto calibration of the BogoMIPS value"
164 The BogoMIPS value can easily be derived from the CPU frequency.
167 bool "Default bootloader kernel arguments"
170 string "Initial kernel command string"
171 depends on CMDLINE_BOOL
172 default "console=ttyS0,38400 root=/dev/ram"
174 On some architectures (EBSA110 and CATS), there is currently no way
175 for the boot loader to pass arguments to the kernel. For these
176 architectures, you should supply some command-line options at build
177 time by entering them here. As a minimum, you should specify the
178 memory size and the root device (e.g., mem=64M root=/dev/nfs).
182 source "drivers/pcmcia/Kconfig"
184 source "drivers/pci/hotplug/Kconfig"
188 menu "Executable file formats"
195 If you enabled support for /proc file system then the file
196 /proc/kcore will contain the kernel core image in ELF format. This
199 $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
201 This is especially useful if you have compiled the kernel with the
202 "-g" option to preserve debugging information. It is mainly used
203 for examining kernel data structures on the live kernel.
205 source "fs/Kconfig.binfmt"
211 source "drivers/Kconfig"
215 source "arch/xtensa/Kconfig.debug"
217 source "security/Kconfig"
219 source "crypto/Kconfig"