2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
9 config RWSEM_GENERIC_SPINLOCK
13 config RWSEM_XCHGADD_ALGORITHM
16 config GENERIC_FIND_NEXT_BIT
20 config GENERIC_HWEIGHT
24 config GENERIC_CALIBRATE_DELAY
28 config GENERIC_HARDIRQS
32 config GENERIC_HARDIRQS_NO__DO_IRQ
44 mainmenu "Fujitsu FR-V Kernel Configuration"
49 menu "Fujitsu FR-V system setup"
54 This options switches on and off support for the FR-V MMU
55 (effectively switching between vmlinux and uClinux). Not all FR-V
56 CPUs support this. Currently only the FR451 has a sufficiently
59 config FRV_OUTOFLINE_ATOMIC_OPS
60 bool "Out-of-line the FRV atomic operations"
63 Setting this option causes the FR-V atomic operations to be mostly
64 implemented out-of-line.
66 See Documentation/fujitsu/frv/atomic-ops.txt for more information.
69 bool "High memory support"
73 If you wish to use more than 256MB of memory with your MMU based
74 system, you will need to select this option. The kernel can only see
75 the memory between 0xC0000000 and 0xD0000000 directly... everything
78 The arch is, however, capable of supporting up to 3GB of SDRAM.
81 bool "Allocate page tables in highmem"
85 The VM uses one page of memory for each page table. For systems
86 with a lot of RAM, this can be wasteful of precious low memory.
87 Setting this option will put user-space page tables in high memory.
92 prompt "uClinux kernel load address"
94 default UCPAGE_OFFSET_C0000000
96 This option sets the base address for the uClinux kernel. The kernel
97 will rearrange the SDRAM layout to start at this address, and move
98 itself to start there. It must be greater than 0, and it must be
99 sufficiently less than 0xE0000000 that the SDRAM does not intersect
102 The base address must also be aligned such that the SDRAM controller
103 can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
105 config UCPAGE_OFFSET_20000000
108 config UCPAGE_OFFSET_40000000
111 config UCPAGE_OFFSET_60000000
114 config UCPAGE_OFFSET_80000000
117 config UCPAGE_OFFSET_A0000000
120 config UCPAGE_OFFSET_C0000000
121 bool "0xC0000000 (Recommended)"
125 config PROTECT_KERNEL
126 bool "Protect core kernel against userspace"
130 Selecting this option causes the uClinux kernel to change the
131 permittivity of DAMPR register covering the core kernel image to
132 prevent userspace accessing the underlying memory directly.
135 prompt "CPU Caching mode"
136 default FRV_DEFL_CACHE_WBACK
138 This option determines the default caching mode for the kernel.
140 Write-Back caching mode involves the all reads and writes causing
141 the affected cacheline to be read into the cache first before being
142 operated upon. Memory is not then updated by a write until the cache
143 is filled and a cacheline needs to be displaced from the cache to
144 make room. Only at that point is it written back.
146 Write-Behind caching is similar to Write-Back caching, except that a
147 write won't fetch a cacheline into the cache if there isn't already
148 one there; it will write directly to memory instead.
150 Write-Through caching only fetches cachelines from memory on a
151 read. Writes always get written directly to memory. If the affected
152 cacheline is also in cache, it will be updated too.
154 The final option is to turn of caching entirely.
156 Note that not all CPUs support Write-Behind caching. If the CPU on
157 which the kernel is running doesn't, it'll fall back to Write-Back
160 config FRV_DEFL_CACHE_WBACK
163 config FRV_DEFL_CACHE_WBEHIND
166 config FRV_DEFL_CACHE_WTHRU
169 config FRV_DEFL_CACHE_DISABLED
174 menu "CPU core support"
177 bool "Include FR401 core support"
181 This enables support for the FR401, FR401A and FR403 CPUs
184 bool "Include FR405 core support"
188 This enables support for the FR405 CPU
191 bool "Include FR451 core support"
194 This enables support for the FR451 CPU
196 config CPU_FR451_COMPILE
197 bool "Specifically compile for FR451 core"
198 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
201 This causes appropriate flags to be passed to the compiler to
202 optimise for the FR451 CPU
205 bool "Include FR551 core support"
209 This enables support for the FR555 CPU
211 config CPU_FR551_COMPILE
212 bool "Specifically compile for FR551 core"
213 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
216 This causes appropriate flags to be passed to the compiler to
217 optimise for the FR555 CPU
219 config FRV_L1_CACHE_SHIFT
221 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
222 default "6" if CPU_FR551
227 prompt "System support"
231 bool "MB93091 CPU board with or without motherboard"
234 bool "MB93093 PDK unit"
240 prompt "Motherboard support"
244 bool "Use the MB93090-MB00 motherboard"
246 Select this option if the MB93091 CPU board is going to be used with
247 a MB93090-MB00 VDK motherboard
250 bool "Use standalone"
252 Select this option if the MB93091 CPU board is going to be used
253 without a motherboard
258 config FUJITSU_MB93493
259 bool "MB93493 Multimedia chip"
261 Select this option if the MB93493 multimedia chip is going to be
265 prompt "GP-Relative data support"
268 This option controls what data, if any, should be placed in the GP
269 relative data sections. Using this means that the compiler can
270 generate accesses to the data using GR16-relative addressing which
271 is faster than absolute instructions and saves space (2 instructions
274 However, the GPREL region is limited in size because the immediate
275 value used in the load and store instructions is limited to a 12-bit
278 So if the linker starts complaining that accesses to GPREL data are
279 out of range, try changing this option from the default.
281 Note that modules will always be compiled with this feature disabled
282 as the module data will not be in range of the GP base address.
285 bool "Put data objects of up to 8 bytes into GP-REL"
288 bool "Put data objects of up to 4 bytes into GP-REL"
290 config GPREL_DATA_NONE
291 bool "Don't use GP-REL"
295 config FRV_ONCPU_SERIAL
296 bool "Use on-CPU serial ports"
302 depends on MB93090_MB00
305 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
306 onboard. If you have one of these boards and you wish to use the PCI
307 facilities, say Y here.
309 The PCI-HOWTO, available from
310 <http://www.tldp.org/docs.html#howto>, contains valuable
311 information about which PCI hardware does work under Linux and which
314 config RESERVE_DMA_COHERENT
315 bool "Reserve DMA coherent memory"
316 depends on PCI && !MMU
319 Many PCI drivers require access to uncached memory for DMA device
320 communications (such as is done with some Ethernet buffer rings). If
321 a fully featured MMU is available, this can be done through page
322 table settings, but if not, a region has to be set aside and marked
323 with a special DAMPR register.
325 Setting this option causes uClinux to set aside a portion of the
326 available memory for use in this manner. The memory will then be
327 unavailable for normal kernel use.
329 source "drivers/pci/Kconfig"
331 source "drivers/pcmcia/Kconfig"
333 #config MATH_EMULATION
334 # bool "Math emulation support (EXPERIMENTAL)"
335 # depends on EXPERIMENTAL
337 # At some point in the future, this will cause floating-point math
338 # instructions to be emulated by the kernel on machines that lack a
339 # floating-point math coprocessor. Thrill-seekers and chronically
340 # sleep-deprived psychotic hacker types can say Y now, everyone else
341 # should probably wait a while.
343 menu "Power management options"
344 source kernel/power/Kconfig
350 menu "Executable formats"
352 source "fs/Kconfig.binfmt"
358 source "drivers/Kconfig"
362 source "arch/frv/Kconfig.debug"
364 source "security/Kconfig"
366 source "crypto/Kconfig"