2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
9 select HAVE_ARCH_TRACEHOOK
15 config RWSEM_GENERIC_SPINLOCK
19 config RWSEM_XCHGADD_ALGORITHM
22 config GENERIC_FIND_NEXT_BIT
26 config GENERIC_HWEIGHT
30 config GENERIC_CALIBRATE_DELAY
34 config GENERIC_HARDIRQS
38 config GENERIC_HARDIRQS_NO__DO_IRQ
54 config ARCH_HAS_ILOG2_U32
58 config ARCH_HAS_ILOG2_U64
66 mainmenu "Fujitsu FR-V Kernel Configuration"
70 source "kernel/Kconfig.freezer"
73 menu "Fujitsu FR-V system setup"
78 This options switches on and off support for the FR-V MMU
79 (effectively switching between vmlinux and uClinux). Not all FR-V
80 CPUs support this. Currently only the FR451 has a sufficiently
83 config FRV_OUTOFLINE_ATOMIC_OPS
84 bool "Out-of-line the FRV atomic operations"
87 Setting this option causes the FR-V atomic operations to be mostly
88 implemented out-of-line.
90 See Documentation/frv/atomic-ops.txt for more information.
93 bool "High memory support"
97 If you wish to use more than 256MB of memory with your MMU based
98 system, you will need to select this option. The kernel can only see
99 the memory between 0xC0000000 and 0xD0000000 directly... everything
100 else must be kmapped.
102 The arch is, however, capable of supporting up to 3GB of SDRAM.
105 bool "Allocate page tables in highmem"
109 The VM uses one page of memory for each page table. For systems
110 with a lot of RAM, this can be wasteful of precious low memory.
111 Setting this option will put user-space page tables in high memory.
116 prompt "uClinux kernel load address"
118 default UCPAGE_OFFSET_C0000000
120 This option sets the base address for the uClinux kernel. The kernel
121 will rearrange the SDRAM layout to start at this address, and move
122 itself to start there. It must be greater than 0, and it must be
123 sufficiently less than 0xE0000000 that the SDRAM does not intersect
126 The base address must also be aligned such that the SDRAM controller
127 can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
129 config UCPAGE_OFFSET_20000000
132 config UCPAGE_OFFSET_40000000
135 config UCPAGE_OFFSET_60000000
138 config UCPAGE_OFFSET_80000000
141 config UCPAGE_OFFSET_A0000000
144 config UCPAGE_OFFSET_C0000000
145 bool "0xC0000000 (Recommended)"
151 default 0x20000000 if UCPAGE_OFFSET_20000000
152 default 0x40000000 if UCPAGE_OFFSET_40000000
153 default 0x60000000 if UCPAGE_OFFSET_60000000
154 default 0x80000000 if UCPAGE_OFFSET_80000000
155 default 0xA0000000 if UCPAGE_OFFSET_A0000000
158 config PROTECT_KERNEL
159 bool "Protect core kernel against userspace"
163 Selecting this option causes the uClinux kernel to change the
164 permittivity of DAMPR register covering the core kernel image to
165 prevent userspace accessing the underlying memory directly.
168 prompt "CPU Caching mode"
169 default FRV_DEFL_CACHE_WBACK
171 This option determines the default caching mode for the kernel.
173 Write-Back caching mode involves the all reads and writes causing
174 the affected cacheline to be read into the cache first before being
175 operated upon. Memory is not then updated by a write until the cache
176 is filled and a cacheline needs to be displaced from the cache to
177 make room. Only at that point is it written back.
179 Write-Behind caching is similar to Write-Back caching, except that a
180 write won't fetch a cacheline into the cache if there isn't already
181 one there; it will write directly to memory instead.
183 Write-Through caching only fetches cachelines from memory on a
184 read. Writes always get written directly to memory. If the affected
185 cacheline is also in cache, it will be updated too.
187 The final option is to turn of caching entirely.
189 Note that not all CPUs support Write-Behind caching. If the CPU on
190 which the kernel is running doesn't, it'll fall back to Write-Back
193 config FRV_DEFL_CACHE_WBACK
196 config FRV_DEFL_CACHE_WBEHIND
199 config FRV_DEFL_CACHE_WTHRU
202 config FRV_DEFL_CACHE_DISABLED
207 menu "CPU core support"
210 bool "Include FR401 core support"
214 This enables support for the FR401, FR401A and FR403 CPUs
217 bool "Include FR405 core support"
221 This enables support for the FR405 CPU
224 bool "Include FR451 core support"
227 This enables support for the FR451 CPU
229 config CPU_FR451_COMPILE
230 bool "Specifically compile for FR451 core"
231 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
234 This causes appropriate flags to be passed to the compiler to
235 optimise for the FR451 CPU
238 bool "Include FR551 core support"
242 This enables support for the FR555 CPU
244 config CPU_FR551_COMPILE
245 bool "Specifically compile for FR551 core"
246 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
249 This causes appropriate flags to be passed to the compiler to
250 optimise for the FR555 CPU
252 config FRV_L1_CACHE_SHIFT
254 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
255 default "6" if CPU_FR551
260 prompt "System support"
264 bool "MB93091 CPU board with or without motherboard"
267 bool "MB93093 PDK unit"
273 prompt "Motherboard support"
277 bool "Use the MB93090-MB00 motherboard"
279 Select this option if the MB93091 CPU board is going to be used with
280 a MB93090-MB00 VDK motherboard
283 bool "Use standalone"
285 Select this option if the MB93091 CPU board is going to be used
286 without a motherboard
291 config FUJITSU_MB93493
292 bool "MB93493 Multimedia chip"
294 Select this option if the MB93493 multimedia chip is going to be
298 prompt "GP-Relative data support"
301 This option controls what data, if any, should be placed in the GP
302 relative data sections. Using this means that the compiler can
303 generate accesses to the data using GR16-relative addressing which
304 is faster than absolute instructions and saves space (2 instructions
307 However, the GPREL region is limited in size because the immediate
308 value used in the load and store instructions is limited to a 12-bit
311 So if the linker starts complaining that accesses to GPREL data are
312 out of range, try changing this option from the default.
314 Note that modules will always be compiled with this feature disabled
315 as the module data will not be in range of the GP base address.
318 bool "Put data objects of up to 8 bytes into GP-REL"
321 bool "Put data objects of up to 4 bytes into GP-REL"
323 config GPREL_DATA_NONE
324 bool "Don't use GP-REL"
328 config FRV_ONCPU_SERIAL
329 bool "Use on-CPU serial ports"
335 depends on MB93090_MB00
338 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
339 onboard. If you have one of these boards and you wish to use the PCI
340 facilities, say Y here.
342 config RESERVE_DMA_COHERENT
343 bool "Reserve DMA coherent memory"
344 depends on PCI && !MMU
347 Many PCI drivers require access to uncached memory for DMA device
348 communications (such as is done with some Ethernet buffer rings). If
349 a fully featured MMU is available, this can be done through page
350 table settings, but if not, a region has to be set aside and marked
351 with a special DAMPR register.
353 Setting this option causes uClinux to set aside a portion of the
354 available memory for use in this manner. The memory will then be
355 unavailable for normal kernel use.
357 source "drivers/pci/Kconfig"
359 source "drivers/pcmcia/Kconfig"
361 #config MATH_EMULATION
362 # bool "Math emulation support (EXPERIMENTAL)"
363 # depends on EXPERIMENTAL
365 # At some point in the future, this will cause floating-point math
366 # instructions to be emulated by the kernel on machines that lack a
367 # floating-point math coprocessor. Thrill-seekers and chronically
368 # sleep-deprived psychotic hacker types can say Y now, everyone else
369 # should probably wait a while.
371 menu "Power management options"
373 config ARCH_SUSPEND_POSSIBLE
377 source kernel/power/Kconfig
383 menu "Executable formats"
385 source "fs/Kconfig.binfmt"
391 source "drivers/Kconfig"
395 source "arch/frv/Kconfig.debug"
397 source "security/Kconfig"
399 source "crypto/Kconfig"