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 config ARCH_USES_SLAB_PAGE_STRUCT
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.
106 bool "Allow allocating large blocks (> 1MB) of memory"
108 Allow the slab memory allocator to keep chains for very large memory
109 sizes - up to 32MB. You may need this if your system has a lot of
110 RAM, and you need to able to allocate very large contiguous chunks.
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)"
149 config PROTECT_KERNEL
150 bool "Protect core kernel against userspace"
154 Selecting this option causes the uClinux kernel to change the
155 permittivity of DAMPR register covering the core kernel image to
156 prevent userspace accessing the underlying memory directly.
159 prompt "CPU Caching mode"
160 default FRV_DEFL_CACHE_WBACK
162 This option determines the default caching mode for the kernel.
164 Write-Back caching mode involves the all reads and writes causing
165 the affected cacheline to be read into the cache first before being
166 operated upon. Memory is not then updated by a write until the cache
167 is filled and a cacheline needs to be displaced from the cache to
168 make room. Only at that point is it written back.
170 Write-Behind caching is similar to Write-Back caching, except that a
171 write won't fetch a cacheline into the cache if there isn't already
172 one there; it will write directly to memory instead.
174 Write-Through caching only fetches cachelines from memory on a
175 read. Writes always get written directly to memory. If the affected
176 cacheline is also in cache, it will be updated too.
178 The final option is to turn of caching entirely.
180 Note that not all CPUs support Write-Behind caching. If the CPU on
181 which the kernel is running doesn't, it'll fall back to Write-Back
184 config FRV_DEFL_CACHE_WBACK
187 config FRV_DEFL_CACHE_WBEHIND
190 config FRV_DEFL_CACHE_WTHRU
193 config FRV_DEFL_CACHE_DISABLED
198 menu "CPU core support"
201 bool "Include FR401 core support"
205 This enables support for the FR401, FR401A and FR403 CPUs
208 bool "Include FR405 core support"
212 This enables support for the FR405 CPU
215 bool "Include FR451 core support"
218 This enables support for the FR451 CPU
220 config CPU_FR451_COMPILE
221 bool "Specifically compile for FR451 core"
222 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
225 This causes appropriate flags to be passed to the compiler to
226 optimise for the FR451 CPU
229 bool "Include FR551 core support"
233 This enables support for the FR555 CPU
235 config CPU_FR551_COMPILE
236 bool "Specifically compile for FR551 core"
237 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
240 This causes appropriate flags to be passed to the compiler to
241 optimise for the FR555 CPU
243 config FRV_L1_CACHE_SHIFT
245 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
246 default "6" if CPU_FR551
251 prompt "System support"
255 bool "MB93091 CPU board with or without motherboard"
258 bool "MB93093 PDK unit"
264 prompt "Motherboard support"
268 bool "Use the MB93090-MB00 motherboard"
270 Select this option if the MB93091 CPU board is going to be used with
271 a MB93090-MB00 VDK motherboard
274 bool "Use standalone"
276 Select this option if the MB93091 CPU board is going to be used
277 without a motherboard
282 config FUJITSU_MB93493
283 bool "MB93493 Multimedia chip"
285 Select this option if the MB93493 multimedia chip is going to be
289 prompt "GP-Relative data support"
292 This option controls what data, if any, should be placed in the GP
293 relative data sections. Using this means that the compiler can
294 generate accesses to the data using GR16-relative addressing which
295 is faster than absolute instructions and saves space (2 instructions
298 However, the GPREL region is limited in size because the immediate
299 value used in the load and store instructions is limited to a 12-bit
302 So if the linker starts complaining that accesses to GPREL data are
303 out of range, try changing this option from the default.
305 Note that modules will always be compiled with this feature disabled
306 as the module data will not be in range of the GP base address.
309 bool "Put data objects of up to 8 bytes into GP-REL"
312 bool "Put data objects of up to 4 bytes into GP-REL"
314 config GPREL_DATA_NONE
315 bool "Don't use GP-REL"
319 config FRV_ONCPU_SERIAL
320 bool "Use on-CPU serial ports"
326 depends on MB93090_MB00
329 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
330 onboard. If you have one of these boards and you wish to use the PCI
331 facilities, say Y here.
333 The PCI-HOWTO, available from
334 <http://www.tldp.org/docs.html#howto>, contains valuable
335 information about which PCI hardware does work under Linux and which
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"
368 source kernel/power/Kconfig
374 menu "Executable formats"
376 source "fs/Kconfig.binfmt"
382 source "drivers/Kconfig"
386 source "arch/frv/Kconfig.debug"
388 source "security/Kconfig"
390 source "crypto/Kconfig"