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
36 mainmenu "Fujitsu FR-V Kernel Configuration"
41 menu "Fujitsu FR-V system setup"
46 This options switches on and off support for the FR-V MMU
47 (effectively switching between vmlinux and uClinux). Not all FR-V
48 CPUs support this. Currently only the FR451 has a sufficiently
51 config FRV_OUTOFLINE_ATOMIC_OPS
52 bool "Out-of-line the FRV atomic operations"
55 Setting this option causes the FR-V atomic operations to be mostly
56 implemented out-of-line.
58 See Documentation/fujitsu/frv/atomic-ops.txt for more information.
61 bool "High memory support"
65 If you wish to use more than 256MB of memory with your MMU based
66 system, you will need to select this option. The kernel can only see
67 the memory between 0xC0000000 and 0xD0000000 directly... everything
70 The arch is, however, capable of supporting up to 3GB of SDRAM.
73 bool "Allocate page tables in highmem"
77 The VM uses one page of memory for each page table. For systems
78 with a lot of RAM, this can be wasteful of precious low memory.
79 Setting this option will put user-space page tables in high memory.
84 prompt "uClinux kernel load address"
86 default UCPAGE_OFFSET_C0000000
88 This option sets the base address for the uClinux kernel. The kernel
89 will rearrange the SDRAM layout to start at this address, and move
90 itself to start there. It must be greater than 0, and it must be
91 sufficiently less than 0xE0000000 that the SDRAM does not intersect
94 The base address must also be aligned such that the SDRAM controller
95 can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
97 config UCPAGE_OFFSET_20000000
100 config UCPAGE_OFFSET_40000000
103 config UCPAGE_OFFSET_60000000
106 config UCPAGE_OFFSET_80000000
109 config UCPAGE_OFFSET_A0000000
112 config UCPAGE_OFFSET_C0000000
113 bool "0xC0000000 (Recommended)"
117 config PROTECT_KERNEL
118 bool "Protect core kernel against userspace"
122 Selecting this option causes the uClinux kernel to change the
123 permittivity of DAMPR register covering the core kernel image to
124 prevent userspace accessing the underlying memory directly.
127 prompt "CPU Caching mode"
128 default FRV_DEFL_CACHE_WBACK
130 This option determines the default caching mode for the kernel.
132 Write-Back caching mode involves the all reads and writes causing
133 the affected cacheline to be read into the cache first before being
134 operated upon. Memory is not then updated by a write until the cache
135 is filled and a cacheline needs to be displaced from the cache to
136 make room. Only at that point is it written back.
138 Write-Behind caching is similar to Write-Back caching, except that a
139 write won't fetch a cacheline into the cache if there isn't already
140 one there; it will write directly to memory instead.
142 Write-Through caching only fetches cachelines from memory on a
143 read. Writes always get written directly to memory. If the affected
144 cacheline is also in cache, it will be updated too.
146 The final option is to turn of caching entirely.
148 Note that not all CPUs support Write-Behind caching. If the CPU on
149 which the kernel is running doesn't, it'll fall back to Write-Back
152 config FRV_DEFL_CACHE_WBACK
155 config FRV_DEFL_CACHE_WBEHIND
158 config FRV_DEFL_CACHE_WTHRU
161 config FRV_DEFL_CACHE_DISABLED
166 menu "CPU core support"
169 bool "Include FR401 core support"
173 This enables support for the FR401, FR401A and FR403 CPUs
176 bool "Include FR405 core support"
180 This enables support for the FR405 CPU
183 bool "Include FR451 core support"
186 This enables support for the FR451 CPU
188 config CPU_FR451_COMPILE
189 bool "Specifically compile for FR451 core"
190 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
193 This causes appropriate flags to be passed to the compiler to
194 optimise for the FR451 CPU
197 bool "Include FR551 core support"
201 This enables support for the FR555 CPU
203 config CPU_FR551_COMPILE
204 bool "Specifically compile for FR551 core"
205 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
208 This causes appropriate flags to be passed to the compiler to
209 optimise for the FR555 CPU
211 config FRV_L1_CACHE_SHIFT
213 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
214 default "6" if CPU_FR551
219 prompt "System support"
223 bool "MB93091 CPU board with or without motherboard"
226 bool "MB93093 PDK unit"
232 prompt "Motherboard support"
236 bool "Use the MB93090-MB00 motherboard"
238 Select this option if the MB93091 CPU board is going to be used with
239 a MB93090-MB00 VDK motherboard
242 bool "Use standalone"
244 Select this option if the MB93091 CPU board is going to be used
245 without a motherboard
251 prompt "GP-Relative data support"
254 This option controls what data, if any, should be placed in the GP
255 relative data sections. Using this means that the compiler can
256 generate accesses to the data using GR16-relative addressing which
257 is faster than absolute instructions and saves space (2 instructions
260 However, the GPREL region is limited in size because the immediate
261 value used in the load and store instructions is limited to a 12-bit
264 So if the linker starts complaining that accesses to GPREL data are
265 out of range, try changing this option from the default.
267 Note that modules will always be compiled with this feature disabled
268 as the module data will not be in range of the GP base address.
271 bool "Put data objects of up to 8 bytes into GP-REL"
274 bool "Put data objects of up to 4 bytes into GP-REL"
276 config GPREL_DATA_NONE
277 bool "Don't use GP-REL"
281 config FRV_ONCPU_SERIAL
282 bool "Use on-CPU serial ports"
288 depends on MB93090_MB00
291 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
292 onboard. If you have one of these boards and you wish to use the PCI
293 facilities, say Y here.
295 The PCI-HOWTO, available from
296 <http://www.tldp.org/docs.html#howto>, contains valuable
297 information about which PCI hardware does work under Linux and which
300 config RESERVE_DMA_COHERENT
301 bool "Reserve DMA coherent memory"
302 depends on PCI && !MMU
305 Many PCI drivers require access to uncached memory for DMA device
306 communications (such as is done with some Ethernet buffer rings). If
307 a fully featured MMU is available, this can be done through page
308 table settings, but if not, a region has to be set aside and marked
309 with a special DAMPR register.
311 Setting this option causes uClinux to set aside a portion of the
312 available memory for use in this manner. The memory will then be
313 unavailable for normal kernel use.
315 source "drivers/pci/Kconfig"
317 source "drivers/pcmcia/Kconfig"
319 #config MATH_EMULATION
320 # bool "Math emulation support (EXPERIMENTAL)"
321 # depends on EXPERIMENTAL
323 # At some point in the future, this will cause floating-point math
324 # instructions to be emulated by the kernel on machines that lack a
325 # floating-point math coprocessor. Thrill-seekers and chronically
326 # sleep-deprived psychotic hacker types can say Y now, everyone else
327 # should probably wait a while.
329 menu "Power management options"
330 source kernel/power/Kconfig
336 menu "Executable formats"
338 source "fs/Kconfig.binfmt"
344 source "drivers/Kconfig"
348 source "arch/frv/Kconfig.debug"
350 source "security/Kconfig"
352 source "crypto/Kconfig"