2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
13 config RWSEM_GENERIC_SPINLOCK
17 config RWSEM_XCHGADD_ALGORITHM
20 config GENERIC_FIND_NEXT_BIT
24 config GENERIC_HWEIGHT
28 config GENERIC_CALIBRATE_DELAY
32 config GENERIC_HARDIRQS
36 config GENERIC_HARDIRQS_NO__DO_IRQ
52 config ARCH_HAS_ILOG2_U32
56 config ARCH_HAS_ILOG2_U64
64 mainmenu "Fujitsu FR-V Kernel Configuration"
69 menu "Fujitsu FR-V system setup"
74 This options switches on and off support for the FR-V MMU
75 (effectively switching between vmlinux and uClinux). Not all FR-V
76 CPUs support this. Currently only the FR451 has a sufficiently
79 config FRV_OUTOFLINE_ATOMIC_OPS
80 bool "Out-of-line the FRV atomic operations"
83 Setting this option causes the FR-V atomic operations to be mostly
84 implemented out-of-line.
86 See Documentation/frv/atomic-ops.txt for more information.
89 bool "High memory support"
93 If you wish to use more than 256MB of memory with your MMU based
94 system, you will need to select this option. The kernel can only see
95 the memory between 0xC0000000 and 0xD0000000 directly... everything
98 The arch is, however, capable of supporting up to 3GB of SDRAM.
101 bool "Allocate page tables in highmem"
105 The VM uses one page of memory for each page table. For systems
106 with a lot of RAM, this can be wasteful of precious low memory.
107 Setting this option will put user-space page tables in high memory.
112 prompt "uClinux kernel load address"
114 default UCPAGE_OFFSET_C0000000
116 This option sets the base address for the uClinux kernel. The kernel
117 will rearrange the SDRAM layout to start at this address, and move
118 itself to start there. It must be greater than 0, and it must be
119 sufficiently less than 0xE0000000 that the SDRAM does not intersect
122 The base address must also be aligned such that the SDRAM controller
123 can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
125 config UCPAGE_OFFSET_20000000
128 config UCPAGE_OFFSET_40000000
131 config UCPAGE_OFFSET_60000000
134 config UCPAGE_OFFSET_80000000
137 config UCPAGE_OFFSET_A0000000
140 config UCPAGE_OFFSET_C0000000
141 bool "0xC0000000 (Recommended)"
147 default 0x20000000 if UCPAGE_OFFSET_20000000
148 default 0x40000000 if UCPAGE_OFFSET_40000000
149 default 0x60000000 if UCPAGE_OFFSET_60000000
150 default 0x80000000 if UCPAGE_OFFSET_80000000
151 default 0xA0000000 if UCPAGE_OFFSET_A0000000
154 config PROTECT_KERNEL
155 bool "Protect core kernel against userspace"
159 Selecting this option causes the uClinux kernel to change the
160 permittivity of DAMPR register covering the core kernel image to
161 prevent userspace accessing the underlying memory directly.
164 prompt "CPU Caching mode"
165 default FRV_DEFL_CACHE_WBACK
167 This option determines the default caching mode for the kernel.
169 Write-Back caching mode involves the all reads and writes causing
170 the affected cacheline to be read into the cache first before being
171 operated upon. Memory is not then updated by a write until the cache
172 is filled and a cacheline needs to be displaced from the cache to
173 make room. Only at that point is it written back.
175 Write-Behind caching is similar to Write-Back caching, except that a
176 write won't fetch a cacheline into the cache if there isn't already
177 one there; it will write directly to memory instead.
179 Write-Through caching only fetches cachelines from memory on a
180 read. Writes always get written directly to memory. If the affected
181 cacheline is also in cache, it will be updated too.
183 The final option is to turn of caching entirely.
185 Note that not all CPUs support Write-Behind caching. If the CPU on
186 which the kernel is running doesn't, it'll fall back to Write-Back
189 config FRV_DEFL_CACHE_WBACK
192 config FRV_DEFL_CACHE_WBEHIND
195 config FRV_DEFL_CACHE_WTHRU
198 config FRV_DEFL_CACHE_DISABLED
203 menu "CPU core support"
206 bool "Include FR401 core support"
210 This enables support for the FR401, FR401A and FR403 CPUs
213 bool "Include FR405 core support"
217 This enables support for the FR405 CPU
220 bool "Include FR451 core support"
223 This enables support for the FR451 CPU
225 config CPU_FR451_COMPILE
226 bool "Specifically compile for FR451 core"
227 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
230 This causes appropriate flags to be passed to the compiler to
231 optimise for the FR451 CPU
234 bool "Include FR551 core support"
238 This enables support for the FR555 CPU
240 config CPU_FR551_COMPILE
241 bool "Specifically compile for FR551 core"
242 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
245 This causes appropriate flags to be passed to the compiler to
246 optimise for the FR555 CPU
248 config FRV_L1_CACHE_SHIFT
250 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
251 default "6" if CPU_FR551
256 prompt "System support"
260 bool "MB93091 CPU board with or without motherboard"
263 bool "MB93093 PDK unit"
269 prompt "Motherboard support"
273 bool "Use the MB93090-MB00 motherboard"
275 Select this option if the MB93091 CPU board is going to be used with
276 a MB93090-MB00 VDK motherboard
279 bool "Use standalone"
281 Select this option if the MB93091 CPU board is going to be used
282 without a motherboard
287 config FUJITSU_MB93493
288 bool "MB93493 Multimedia chip"
290 Select this option if the MB93493 multimedia chip is going to be
294 prompt "GP-Relative data support"
297 This option controls what data, if any, should be placed in the GP
298 relative data sections. Using this means that the compiler can
299 generate accesses to the data using GR16-relative addressing which
300 is faster than absolute instructions and saves space (2 instructions
303 However, the GPREL region is limited in size because the immediate
304 value used in the load and store instructions is limited to a 12-bit
307 So if the linker starts complaining that accesses to GPREL data are
308 out of range, try changing this option from the default.
310 Note that modules will always be compiled with this feature disabled
311 as the module data will not be in range of the GP base address.
314 bool "Put data objects of up to 8 bytes into GP-REL"
317 bool "Put data objects of up to 4 bytes into GP-REL"
319 config GPREL_DATA_NONE
320 bool "Don't use GP-REL"
324 config FRV_ONCPU_SERIAL
325 bool "Use on-CPU serial ports"
331 depends on MB93090_MB00
334 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
335 onboard. If you have one of these boards and you wish to use the PCI
336 facilities, say Y here.
338 config RESERVE_DMA_COHERENT
339 bool "Reserve DMA coherent memory"
340 depends on PCI && !MMU
343 Many PCI drivers require access to uncached memory for DMA device
344 communications (such as is done with some Ethernet buffer rings). If
345 a fully featured MMU is available, this can be done through page
346 table settings, but if not, a region has to be set aside and marked
347 with a special DAMPR register.
349 Setting this option causes uClinux to set aside a portion of the
350 available memory for use in this manner. The memory will then be
351 unavailable for normal kernel use.
353 source "drivers/pci/Kconfig"
355 source "drivers/pcmcia/Kconfig"
357 #config MATH_EMULATION
358 # bool "Math emulation support (EXPERIMENTAL)"
359 # depends on EXPERIMENTAL
361 # At some point in the future, this will cause floating-point math
362 # instructions to be emulated by the kernel on machines that lack a
363 # floating-point math coprocessor. Thrill-seekers and chronically
364 # sleep-deprived psychotic hacker types can say Y now, everyone else
365 # should probably wait a while.
367 menu "Power management options"
369 config ARCH_SUSPEND_POSSIBLE
373 source kernel/power/Kconfig
379 menu "Executable formats"
381 source "fs/Kconfig.binfmt"
387 source "drivers/Kconfig"
391 source "arch/frv/Kconfig.debug"
393 source "security/Kconfig"
395 source "crypto/Kconfig"