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
48 config ARCH_HAS_ILOG2_U32
52 config ARCH_HAS_ILOG2_U64
56 mainmenu "Fujitsu FR-V Kernel Configuration"
61 menu "Fujitsu FR-V system setup"
66 This options switches on and off support for the FR-V MMU
67 (effectively switching between vmlinux and uClinux). Not all FR-V
68 CPUs support this. Currently only the FR451 has a sufficiently
71 config FRV_OUTOFLINE_ATOMIC_OPS
72 bool "Out-of-line the FRV atomic operations"
75 Setting this option causes the FR-V atomic operations to be mostly
76 implemented out-of-line.
78 See Documentation/fujitsu/frv/atomic-ops.txt for more information.
81 bool "High memory support"
85 If you wish to use more than 256MB of memory with your MMU based
86 system, you will need to select this option. The kernel can only see
87 the memory between 0xC0000000 and 0xD0000000 directly... everything
90 The arch is, however, capable of supporting up to 3GB of SDRAM.
93 bool "Allocate page tables in highmem"
97 The VM uses one page of memory for each page table. For systems
98 with a lot of RAM, this can be wasteful of precious low memory.
99 Setting this option will put user-space page tables in high memory.
102 bool "Allow allocating large blocks (> 1MB) of memory"
104 Allow the slab memory allocator to keep chains for very large memory
105 sizes - up to 32MB. You may need this if your system has a lot of
106 RAM, and you need to able to allocate very large contiguous chunks.
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)"
145 config PROTECT_KERNEL
146 bool "Protect core kernel against userspace"
150 Selecting this option causes the uClinux kernel to change the
151 permittivity of DAMPR register covering the core kernel image to
152 prevent userspace accessing the underlying memory directly.
155 prompt "CPU Caching mode"
156 default FRV_DEFL_CACHE_WBACK
158 This option determines the default caching mode for the kernel.
160 Write-Back caching mode involves the all reads and writes causing
161 the affected cacheline to be read into the cache first before being
162 operated upon. Memory is not then updated by a write until the cache
163 is filled and a cacheline needs to be displaced from the cache to
164 make room. Only at that point is it written back.
166 Write-Behind caching is similar to Write-Back caching, except that a
167 write won't fetch a cacheline into the cache if there isn't already
168 one there; it will write directly to memory instead.
170 Write-Through caching only fetches cachelines from memory on a
171 read. Writes always get written directly to memory. If the affected
172 cacheline is also in cache, it will be updated too.
174 The final option is to turn of caching entirely.
176 Note that not all CPUs support Write-Behind caching. If the CPU on
177 which the kernel is running doesn't, it'll fall back to Write-Back
180 config FRV_DEFL_CACHE_WBACK
183 config FRV_DEFL_CACHE_WBEHIND
186 config FRV_DEFL_CACHE_WTHRU
189 config FRV_DEFL_CACHE_DISABLED
194 menu "CPU core support"
197 bool "Include FR401 core support"
201 This enables support for the FR401, FR401A and FR403 CPUs
204 bool "Include FR405 core support"
208 This enables support for the FR405 CPU
211 bool "Include FR451 core support"
214 This enables support for the FR451 CPU
216 config CPU_FR451_COMPILE
217 bool "Specifically compile for FR451 core"
218 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
221 This causes appropriate flags to be passed to the compiler to
222 optimise for the FR451 CPU
225 bool "Include FR551 core support"
229 This enables support for the FR555 CPU
231 config CPU_FR551_COMPILE
232 bool "Specifically compile for FR551 core"
233 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
236 This causes appropriate flags to be passed to the compiler to
237 optimise for the FR555 CPU
239 config FRV_L1_CACHE_SHIFT
241 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
242 default "6" if CPU_FR551
247 prompt "System support"
251 bool "MB93091 CPU board with or without motherboard"
254 bool "MB93093 PDK unit"
260 prompt "Motherboard support"
264 bool "Use the MB93090-MB00 motherboard"
266 Select this option if the MB93091 CPU board is going to be used with
267 a MB93090-MB00 VDK motherboard
270 bool "Use standalone"
272 Select this option if the MB93091 CPU board is going to be used
273 without a motherboard
278 config FUJITSU_MB93493
279 bool "MB93493 Multimedia chip"
281 Select this option if the MB93493 multimedia chip is going to be
285 prompt "GP-Relative data support"
288 This option controls what data, if any, should be placed in the GP
289 relative data sections. Using this means that the compiler can
290 generate accesses to the data using GR16-relative addressing which
291 is faster than absolute instructions and saves space (2 instructions
294 However, the GPREL region is limited in size because the immediate
295 value used in the load and store instructions is limited to a 12-bit
298 So if the linker starts complaining that accesses to GPREL data are
299 out of range, try changing this option from the default.
301 Note that modules will always be compiled with this feature disabled
302 as the module data will not be in range of the GP base address.
305 bool "Put data objects of up to 8 bytes into GP-REL"
308 bool "Put data objects of up to 4 bytes into GP-REL"
310 config GPREL_DATA_NONE
311 bool "Don't use GP-REL"
315 config FRV_ONCPU_SERIAL
316 bool "Use on-CPU serial ports"
322 depends on MB93090_MB00
325 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
326 onboard. If you have one of these boards and you wish to use the PCI
327 facilities, say Y here.
329 The PCI-HOWTO, available from
330 <http://www.tldp.org/docs.html#howto>, contains valuable
331 information about which PCI hardware does work under Linux and which
334 config RESERVE_DMA_COHERENT
335 bool "Reserve DMA coherent memory"
336 depends on PCI && !MMU
339 Many PCI drivers require access to uncached memory for DMA device
340 communications (such as is done with some Ethernet buffer rings). If
341 a fully featured MMU is available, this can be done through page
342 table settings, but if not, a region has to be set aside and marked
343 with a special DAMPR register.
345 Setting this option causes uClinux to set aside a portion of the
346 available memory for use in this manner. The memory will then be
347 unavailable for normal kernel use.
349 source "drivers/pci/Kconfig"
351 source "drivers/pcmcia/Kconfig"
353 #config MATH_EMULATION
354 # bool "Math emulation support (EXPERIMENTAL)"
355 # depends on EXPERIMENTAL
357 # At some point in the future, this will cause floating-point math
358 # instructions to be emulated by the kernel on machines that lack a
359 # floating-point math coprocessor. Thrill-seekers and chronically
360 # sleep-deprived psychotic hacker types can say Y now, everyone else
361 # should probably wait a while.
363 menu "Power management options"
364 source kernel/power/Kconfig
370 menu "Executable formats"
372 source "fs/Kconfig.binfmt"
378 source "drivers/Kconfig"
382 source "arch/frv/Kconfig.debug"
384 source "security/Kconfig"
386 source "crypto/Kconfig"