2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
14 config RWSEM_GENERIC_SPINLOCK
18 config RWSEM_XCHGADD_ALGORITHM
21 config GENERIC_FIND_NEXT_BIT
25 config GENERIC_HWEIGHT
29 config GENERIC_CALIBRATE_DELAY
33 config GENERIC_HARDIRQS
37 config GENERIC_HARDIRQS_NO__DO_IRQ
53 config ARCH_HAS_ILOG2_U32
57 config ARCH_HAS_ILOG2_U64
65 mainmenu "Fujitsu FR-V Kernel Configuration"
70 menu "Fujitsu FR-V system setup"
75 This options switches on and off support for the FR-V MMU
76 (effectively switching between vmlinux and uClinux). Not all FR-V
77 CPUs support this. Currently only the FR451 has a sufficiently
80 config FRV_OUTOFLINE_ATOMIC_OPS
81 bool "Out-of-line the FRV atomic operations"
84 Setting this option causes the FR-V atomic operations to be mostly
85 implemented out-of-line.
87 See Documentation/frv/atomic-ops.txt for more information.
90 bool "High memory support"
94 If you wish to use more than 256MB of memory with your MMU based
95 system, you will need to select this option. The kernel can only see
96 the memory between 0xC0000000 and 0xD0000000 directly... everything
99 The arch is, however, capable of supporting up to 3GB of SDRAM.
102 bool "Allocate page tables in highmem"
106 The VM uses one page of memory for each page table. For systems
107 with a lot of RAM, this can be wasteful of precious low memory.
108 Setting this option will put user-space page tables in high memory.
113 prompt "uClinux kernel load address"
115 default UCPAGE_OFFSET_C0000000
117 This option sets the base address for the uClinux kernel. The kernel
118 will rearrange the SDRAM layout to start at this address, and move
119 itself to start there. It must be greater than 0, and it must be
120 sufficiently less than 0xE0000000 that the SDRAM does not intersect
123 The base address must also be aligned such that the SDRAM controller
124 can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
126 config UCPAGE_OFFSET_20000000
129 config UCPAGE_OFFSET_40000000
132 config UCPAGE_OFFSET_60000000
135 config UCPAGE_OFFSET_80000000
138 config UCPAGE_OFFSET_A0000000
141 config UCPAGE_OFFSET_C0000000
142 bool "0xC0000000 (Recommended)"
148 default 0x20000000 if UCPAGE_OFFSET_20000000
149 default 0x40000000 if UCPAGE_OFFSET_40000000
150 default 0x60000000 if UCPAGE_OFFSET_60000000
151 default 0x80000000 if UCPAGE_OFFSET_80000000
152 default 0xA0000000 if UCPAGE_OFFSET_A0000000
155 config PROTECT_KERNEL
156 bool "Protect core kernel against userspace"
160 Selecting this option causes the uClinux kernel to change the
161 permittivity of DAMPR register covering the core kernel image to
162 prevent userspace accessing the underlying memory directly.
165 prompt "CPU Caching mode"
166 default FRV_DEFL_CACHE_WBACK
168 This option determines the default caching mode for the kernel.
170 Write-Back caching mode involves the all reads and writes causing
171 the affected cacheline to be read into the cache first before being
172 operated upon. Memory is not then updated by a write until the cache
173 is filled and a cacheline needs to be displaced from the cache to
174 make room. Only at that point is it written back.
176 Write-Behind caching is similar to Write-Back caching, except that a
177 write won't fetch a cacheline into the cache if there isn't already
178 one there; it will write directly to memory instead.
180 Write-Through caching only fetches cachelines from memory on a
181 read. Writes always get written directly to memory. If the affected
182 cacheline is also in cache, it will be updated too.
184 The final option is to turn of caching entirely.
186 Note that not all CPUs support Write-Behind caching. If the CPU on
187 which the kernel is running doesn't, it'll fall back to Write-Back
190 config FRV_DEFL_CACHE_WBACK
193 config FRV_DEFL_CACHE_WBEHIND
196 config FRV_DEFL_CACHE_WTHRU
199 config FRV_DEFL_CACHE_DISABLED
204 menu "CPU core support"
207 bool "Include FR401 core support"
211 This enables support for the FR401, FR401A and FR403 CPUs
214 bool "Include FR405 core support"
218 This enables support for the FR405 CPU
221 bool "Include FR451 core support"
224 This enables support for the FR451 CPU
226 config CPU_FR451_COMPILE
227 bool "Specifically compile for FR451 core"
228 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
231 This causes appropriate flags to be passed to the compiler to
232 optimise for the FR451 CPU
235 bool "Include FR551 core support"
239 This enables support for the FR555 CPU
241 config CPU_FR551_COMPILE
242 bool "Specifically compile for FR551 core"
243 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
246 This causes appropriate flags to be passed to the compiler to
247 optimise for the FR555 CPU
249 config FRV_L1_CACHE_SHIFT
251 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
252 default "6" if CPU_FR551
257 prompt "System support"
261 bool "MB93091 CPU board with or without motherboard"
264 bool "MB93093 PDK unit"
270 prompt "Motherboard support"
274 bool "Use the MB93090-MB00 motherboard"
276 Select this option if the MB93091 CPU board is going to be used with
277 a MB93090-MB00 VDK motherboard
280 bool "Use standalone"
282 Select this option if the MB93091 CPU board is going to be used
283 without a motherboard
288 config FUJITSU_MB93493
289 bool "MB93493 Multimedia chip"
291 Select this option if the MB93493 multimedia chip is going to be
295 prompt "GP-Relative data support"
298 This option controls what data, if any, should be placed in the GP
299 relative data sections. Using this means that the compiler can
300 generate accesses to the data using GR16-relative addressing which
301 is faster than absolute instructions and saves space (2 instructions
304 However, the GPREL region is limited in size because the immediate
305 value used in the load and store instructions is limited to a 12-bit
308 So if the linker starts complaining that accesses to GPREL data are
309 out of range, try changing this option from the default.
311 Note that modules will always be compiled with this feature disabled
312 as the module data will not be in range of the GP base address.
315 bool "Put data objects of up to 8 bytes into GP-REL"
318 bool "Put data objects of up to 4 bytes into GP-REL"
320 config GPREL_DATA_NONE
321 bool "Don't use GP-REL"
325 config FRV_ONCPU_SERIAL
326 bool "Use on-CPU serial ports"
332 depends on MB93090_MB00
335 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
336 onboard. If you have one of these boards and you wish to use the PCI
337 facilities, say Y here.
339 config RESERVE_DMA_COHERENT
340 bool "Reserve DMA coherent memory"
341 depends on PCI && !MMU
344 Many PCI drivers require access to uncached memory for DMA device
345 communications (such as is done with some Ethernet buffer rings). If
346 a fully featured MMU is available, this can be done through page
347 table settings, but if not, a region has to be set aside and marked
348 with a special DAMPR register.
350 Setting this option causes uClinux to set aside a portion of the
351 available memory for use in this manner. The memory will then be
352 unavailable for normal kernel use.
354 source "drivers/pci/Kconfig"
356 source "drivers/pcmcia/Kconfig"
358 #config MATH_EMULATION
359 # bool "Math emulation support (EXPERIMENTAL)"
360 # depends on EXPERIMENTAL
362 # At some point in the future, this will cause floating-point math
363 # instructions to be emulated by the kernel on machines that lack a
364 # floating-point math coprocessor. Thrill-seekers and chronically
365 # sleep-deprived psychotic hacker types can say Y now, everyone else
366 # should probably wait a while.
368 menu "Power management options"
370 config ARCH_SUSPEND_POSSIBLE
374 source kernel/power/Kconfig
380 menu "Executable formats"
382 source "fs/Kconfig.binfmt"
388 source "drivers/Kconfig"
392 source "arch/frv/Kconfig.debug"
394 source "security/Kconfig"
396 source "crypto/Kconfig"