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 ARCH_WANT_OPTIONAL_GPIOLIB
18 Xtensa processors are 32-bit RISC machines designed by Tensilica
19 primarily for embedded systems. These processors are both
20 configurable and extensible. The Linux port to the Xtensa
21 architecture supports all processor configurations and extensions,
22 with reasonable minimum requirements. The Xtensa Linux project has
23 a home page at <http://xtensa.sourceforge.net/>.
25 config RWSEM_XCHGADD_ALGORITHM
28 config GENERIC_HWEIGHT
34 config ARCH_HAS_ILOG2_U32
37 config ARCH_HAS_ILOG2_U64
48 source "kernel/Kconfig.freezer"
53 config VARIANT_IRQ_SWITCH
56 menu "Processor type and features"
59 prompt "Xtensa Processor Configuration"
60 default XTENSA_VARIANT_FSF
62 config XTENSA_VARIANT_FSF
63 bool "fsf - default (not generic) configuration"
66 config XTENSA_VARIANT_DC232B
67 bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
70 This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
72 config XTENSA_VARIANT_S6000
73 bool "s6000 - Stretch software configurable processor"
74 select VARIANT_IRQ_SWITCH
75 select ARCH_REQUIRE_GPIOLIB
76 select XTENSA_CALIBRATE_CCOUNT
79 config XTENSA_UNALIGNED_USER
80 bool "Unaligned memory access in use space"
82 The Xtensa architecture currently does not handle unaligned
83 memory accesses in hardware but through an exception handler.
84 Per default, unaligned memory accesses are disabled in user space.
86 Say Y here to enable unaligned memory access in user space.
88 source "kernel/Kconfig.preempt"
93 Can we use information of configuration file?
97 config XTENSA_CALIBRATE_CCOUNT
100 On some platforms (XT2000, for example), the CPU clock rate can
101 vary. The frequency can be determined, however, by measuring
102 against a well known, fixed frequency, such as an UART oscillator.
104 config SERIAL_CONSOLE
107 config XTENSA_ISS_NETWORK
116 Find out whether you have a PCI motherboard. PCI is the name of a
117 bus system, i.e. the way the CPU talks to the other stuff inside
118 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
119 VESA. If you have PCI, say Y, otherwise N.
121 source "drivers/pci/Kconfig"
125 menu "Platform options"
128 prompt "Xtensa System Type"
129 default XTENSA_PLATFORM_ISS
131 config XTENSA_PLATFORM_ISS
133 select XTENSA_CALIBRATE_CCOUNT
134 select SERIAL_CONSOLE
135 select XTENSA_ISS_NETWORK
137 ISS is an acronym for Tensilica's Instruction Set Simulator.
139 config XTENSA_PLATFORM_XT2000
142 XT2000 is the name of Tensilica's feature-rich emulation platform.
143 This hardware is capable of running a full Linux distribution.
145 config XTENSA_PLATFORM_S6105
147 select SERIAL_CONSOLE
153 config XTENSA_CPU_CLOCK
154 int "CPU clock rate [MHz]"
155 depends on !XTENSA_CALIBRATE_CCOUNT
158 config GENERIC_CALIBRATE_DELAY
159 bool "Auto calibration of the BogoMIPS value"
161 The BogoMIPS value can easily be derived from the CPU frequency.
164 bool "Default bootloader kernel arguments"
167 string "Initial kernel command string"
168 depends on CMDLINE_BOOL
169 default "console=ttyS0,38400 root=/dev/ram"
171 On some architectures (EBSA110 and CATS), there is currently no way
172 for the boot loader to pass arguments to the kernel. For these
173 architectures, you should supply some command-line options at build
174 time by entering them here. As a minimum, you should specify the
175 memory size and the root device (e.g., mem=64M root=/dev/nfs).
179 source "drivers/pcmcia/Kconfig"
181 source "drivers/pci/hotplug/Kconfig"
185 menu "Executable file formats"
192 If you enabled support for /proc file system then the file
193 /proc/kcore will contain the kernel core image in ELF format. This
196 $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
198 This is especially useful if you have compiled the kernel with the
199 "-g" option to preserve debugging information. It is mainly used
200 for examining kernel data structures on the live kernel.
202 source "fs/Kconfig.binfmt"
208 source "drivers/Kconfig"
212 source "arch/xtensa/Kconfig.debug"
214 source "security/Kconfig"
216 source "crypto/Kconfig"