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
20 Xtensa processors are 32-bit RISC machines designed by Tensilica
21 primarily for embedded systems. These processors are both
22 configurable and extensible. The Linux port to the Xtensa
23 architecture supports all processor configurations and extensions,
24 with reasonable minimum requirements. The Xtensa Linux project has
25 a home page at <http://xtensa.sourceforge.net/>.
27 config RWSEM_XCHGADD_ALGORITHM
30 config GENERIC_HWEIGHT
36 config ARCH_HAS_ILOG2_U32
39 config ARCH_HAS_ILOG2_U64
50 source "kernel/Kconfig.freezer"
55 config VARIANT_IRQ_SWITCH
58 menu "Processor type and features"
61 prompt "Xtensa Processor Configuration"
62 default XTENSA_VARIANT_FSF
64 config XTENSA_VARIANT_FSF
65 bool "fsf - default (not generic) configuration"
68 config XTENSA_VARIANT_DC232B
69 bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
72 This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
74 config XTENSA_VARIANT_S6000
75 bool "s6000 - Stretch software configurable processor"
76 select VARIANT_IRQ_SWITCH
77 select ARCH_REQUIRE_GPIOLIB
78 select XTENSA_CALIBRATE_CCOUNT
81 config XTENSA_UNALIGNED_USER
82 bool "Unaligned memory access in use space"
84 The Xtensa architecture currently does not handle unaligned
85 memory accesses in hardware but through an exception handler.
86 Per default, unaligned memory accesses are disabled in user space.
88 Say Y here to enable unaligned memory access in user space.
90 source "kernel/Kconfig.preempt"
95 Can we use information of configuration file?
99 config XTENSA_CALIBRATE_CCOUNT
102 On some platforms (XT2000, for example), the CPU clock rate can
103 vary. The frequency can be determined, however, by measuring
104 against a well known, fixed frequency, such as an UART oscillator.
106 config SERIAL_CONSOLE
109 config XTENSA_ISS_NETWORK
118 Find out whether you have a PCI motherboard. PCI is the name of a
119 bus system, i.e. the way the CPU talks to the other stuff inside
120 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
121 VESA. If you have PCI, say Y, otherwise N.
123 source "drivers/pci/Kconfig"
127 menu "Platform options"
130 prompt "Xtensa System Type"
131 default XTENSA_PLATFORM_ISS
133 config XTENSA_PLATFORM_ISS
135 select XTENSA_CALIBRATE_CCOUNT
136 select SERIAL_CONSOLE
137 select XTENSA_ISS_NETWORK
139 ISS is an acronym for Tensilica's Instruction Set Simulator.
141 config XTENSA_PLATFORM_XT2000
144 XT2000 is the name of Tensilica's feature-rich emulation platform.
145 This hardware is capable of running a full Linux distribution.
147 config XTENSA_PLATFORM_S6105
149 select SERIAL_CONSOLE
155 config XTENSA_CPU_CLOCK
156 int "CPU clock rate [MHz]"
157 depends on !XTENSA_CALIBRATE_CCOUNT
160 config GENERIC_CALIBRATE_DELAY
161 bool "Auto calibration of the BogoMIPS value"
163 The BogoMIPS value can easily be derived from the CPU frequency.
166 bool "Default bootloader kernel arguments"
169 string "Initial kernel command string"
170 depends on CMDLINE_BOOL
171 default "console=ttyS0,38400 root=/dev/ram"
173 On some architectures (EBSA110 and CATS), there is currently no way
174 for the boot loader to pass arguments to the kernel. For these
175 architectures, you should supply some command-line options at build
176 time by entering them here. As a minimum, you should specify the
177 memory size and the root device (e.g., mem=64M root=/dev/nfs).
181 source "drivers/pcmcia/Kconfig"
183 source "drivers/pci/hotplug/Kconfig"
187 menu "Executable file formats"
194 If you enabled support for /proc file system then the file
195 /proc/kcore will contain the kernel core image in ELF format. This
198 $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
200 This is especially useful if you have compiled the kernel with the
201 "-g" option to preserve debugging information. It is mainly used
202 for examining kernel data structures on the live kernel.
204 source "fs/Kconfig.binfmt"
210 source "drivers/Kconfig"
214 source "arch/xtensa/Kconfig.debug"
216 source "security/Kconfig"
218 source "crypto/Kconfig"