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
60 mainmenu "Fujitsu FR-V Kernel Configuration"
65 menu "Fujitsu FR-V system setup"
70 This options switches on and off support for the FR-V MMU
71 (effectively switching between vmlinux and uClinux). Not all FR-V
72 CPUs support this. Currently only the FR451 has a sufficiently
75 config FRV_OUTOFLINE_ATOMIC_OPS
76 bool "Out-of-line the FRV atomic operations"
79 Setting this option causes the FR-V atomic operations to be mostly
80 implemented out-of-line.
82 See Documentation/fujitsu/frv/atomic-ops.txt for more information.
85 bool "High memory support"
89 If you wish to use more than 256MB of memory with your MMU based
90 system, you will need to select this option. The kernel can only see
91 the memory between 0xC0000000 and 0xD0000000 directly... everything
94 The arch is, however, capable of supporting up to 3GB of SDRAM.
97 bool "Allocate page tables in highmem"
101 The VM uses one page of memory for each page table. For systems
102 with a lot of RAM, this can be wasteful of precious low memory.
103 Setting this option will put user-space page tables in high memory.
108 prompt "uClinux kernel load address"
110 default UCPAGE_OFFSET_C0000000
112 This option sets the base address for the uClinux kernel. The kernel
113 will rearrange the SDRAM layout to start at this address, and move
114 itself to start there. It must be greater than 0, and it must be
115 sufficiently less than 0xE0000000 that the SDRAM does not intersect
118 The base address must also be aligned such that the SDRAM controller
119 can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
121 config UCPAGE_OFFSET_20000000
124 config UCPAGE_OFFSET_40000000
127 config UCPAGE_OFFSET_60000000
130 config UCPAGE_OFFSET_80000000
133 config UCPAGE_OFFSET_A0000000
136 config UCPAGE_OFFSET_C0000000
137 bool "0xC0000000 (Recommended)"
141 config PROTECT_KERNEL
142 bool "Protect core kernel against userspace"
146 Selecting this option causes the uClinux kernel to change the
147 permittivity of DAMPR register covering the core kernel image to
148 prevent userspace accessing the underlying memory directly.
151 prompt "CPU Caching mode"
152 default FRV_DEFL_CACHE_WBACK
154 This option determines the default caching mode for the kernel.
156 Write-Back caching mode involves the all reads and writes causing
157 the affected cacheline to be read into the cache first before being
158 operated upon. Memory is not then updated by a write until the cache
159 is filled and a cacheline needs to be displaced from the cache to
160 make room. Only at that point is it written back.
162 Write-Behind caching is similar to Write-Back caching, except that a
163 write won't fetch a cacheline into the cache if there isn't already
164 one there; it will write directly to memory instead.
166 Write-Through caching only fetches cachelines from memory on a
167 read. Writes always get written directly to memory. If the affected
168 cacheline is also in cache, it will be updated too.
170 The final option is to turn of caching entirely.
172 Note that not all CPUs support Write-Behind caching. If the CPU on
173 which the kernel is running doesn't, it'll fall back to Write-Back
176 config FRV_DEFL_CACHE_WBACK
179 config FRV_DEFL_CACHE_WBEHIND
182 config FRV_DEFL_CACHE_WTHRU
185 config FRV_DEFL_CACHE_DISABLED
190 menu "CPU core support"
193 bool "Include FR401 core support"
197 This enables support for the FR401, FR401A and FR403 CPUs
200 bool "Include FR405 core support"
204 This enables support for the FR405 CPU
207 bool "Include FR451 core support"
210 This enables support for the FR451 CPU
212 config CPU_FR451_COMPILE
213 bool "Specifically compile for FR451 core"
214 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
217 This causes appropriate flags to be passed to the compiler to
218 optimise for the FR451 CPU
221 bool "Include FR551 core support"
225 This enables support for the FR555 CPU
227 config CPU_FR551_COMPILE
228 bool "Specifically compile for FR551 core"
229 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
232 This causes appropriate flags to be passed to the compiler to
233 optimise for the FR555 CPU
235 config FRV_L1_CACHE_SHIFT
237 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
238 default "6" if CPU_FR551
243 prompt "System support"
247 bool "MB93091 CPU board with or without motherboard"
250 bool "MB93093 PDK unit"
256 prompt "Motherboard support"
260 bool "Use the MB93090-MB00 motherboard"
262 Select this option if the MB93091 CPU board is going to be used with
263 a MB93090-MB00 VDK motherboard
266 bool "Use standalone"
268 Select this option if the MB93091 CPU board is going to be used
269 without a motherboard
274 config FUJITSU_MB93493
275 bool "MB93493 Multimedia chip"
277 Select this option if the MB93493 multimedia chip is going to be
281 prompt "GP-Relative data support"
284 This option controls what data, if any, should be placed in the GP
285 relative data sections. Using this means that the compiler can
286 generate accesses to the data using GR16-relative addressing which
287 is faster than absolute instructions and saves space (2 instructions
290 However, the GPREL region is limited in size because the immediate
291 value used in the load and store instructions is limited to a 12-bit
294 So if the linker starts complaining that accesses to GPREL data are
295 out of range, try changing this option from the default.
297 Note that modules will always be compiled with this feature disabled
298 as the module data will not be in range of the GP base address.
301 bool "Put data objects of up to 8 bytes into GP-REL"
304 bool "Put data objects of up to 4 bytes into GP-REL"
306 config GPREL_DATA_NONE
307 bool "Don't use GP-REL"
311 config FRV_ONCPU_SERIAL
312 bool "Use on-CPU serial ports"
318 depends on MB93090_MB00
321 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
322 onboard. If you have one of these boards and you wish to use the PCI
323 facilities, say Y here.
325 config RESERVE_DMA_COHERENT
326 bool "Reserve DMA coherent memory"
327 depends on PCI && !MMU
330 Many PCI drivers require access to uncached memory for DMA device
331 communications (such as is done with some Ethernet buffer rings). If
332 a fully featured MMU is available, this can be done through page
333 table settings, but if not, a region has to be set aside and marked
334 with a special DAMPR register.
336 Setting this option causes uClinux to set aside a portion of the
337 available memory for use in this manner. The memory will then be
338 unavailable for normal kernel use.
340 source "drivers/pci/Kconfig"
342 source "drivers/pcmcia/Kconfig"
344 #config MATH_EMULATION
345 # bool "Math emulation support (EXPERIMENTAL)"
346 # depends on EXPERIMENTAL
348 # At some point in the future, this will cause floating-point math
349 # instructions to be emulated by the kernel on machines that lack a
350 # floating-point math coprocessor. Thrill-seekers and chronically
351 # sleep-deprived psychotic hacker types can say Y now, everyone else
352 # should probably wait a while.
354 menu "Power management options"
356 config ARCH_SUSPEND_POSSIBLE
360 source kernel/power/Kconfig
366 menu "Executable formats"
368 source "fs/Kconfig.binfmt"
374 source "drivers/Kconfig"
378 source "arch/frv/Kconfig.debug"
380 source "security/Kconfig"
382 source "crypto/Kconfig"