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_CALIBRATE_DELAY
24 config GENERIC_HARDIRQS
32 mainmenu "Fujitsu FR-V Kernel Configuration"
37 menu "Fujitsu FR-V system setup"
42 This options switches on and off support for the FR-V MMU
43 (effectively switching between vmlinux and uClinux). Not all FR-V
44 CPUs support this. Currently only the FR451 has a sufficiently
47 config FRV_OUTOFLINE_ATOMIC_OPS
48 bool "Out-of-line the FRV atomic operations"
51 Setting this option causes the FR-V atomic operations to be mostly
52 implemented out-of-line.
54 See Documentation/fujitsu/frv/atomic-ops.txt for more information.
57 bool "High memory support"
61 If you wish to use more than 256MB of memory with your MMU based
62 system, you will need to select this option. The kernel can only see
63 the memory between 0xC0000000 and 0xD0000000 directly... everything
66 The arch is, however, capable of supporting up to 3GB of SDRAM.
69 bool "Allocate page tables in highmem"
73 The VM uses one page of memory for each page table. For systems
74 with a lot of RAM, this can be wasteful of precious low memory.
75 Setting this option will put user-space page tables in high memory.
80 prompt "uClinux kernel load address"
82 default UCPAGE_OFFSET_C0000000
84 This option sets the base address for the uClinux kernel. The kernel
85 will rearrange the SDRAM layout to start at this address, and move
86 itself to start there. It must be greater than 0, and it must be
87 sufficiently less than 0xE0000000 that the SDRAM does not intersect
90 The base address must also be aligned such that the SDRAM controller
91 can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
93 config UCPAGE_OFFSET_20000000
96 config UCPAGE_OFFSET_40000000
99 config UCPAGE_OFFSET_60000000
102 config UCPAGE_OFFSET_80000000
105 config UCPAGE_OFFSET_A0000000
108 config UCPAGE_OFFSET_C0000000
109 bool "0xC0000000 (Recommended)"
113 config PROTECT_KERNEL
114 bool "Protect core kernel against userspace"
118 Selecting this option causes the uClinux kernel to change the
119 permittivity of DAMPR register covering the core kernel image to
120 prevent userspace accessing the underlying memory directly.
123 prompt "CPU Caching mode"
124 default FRV_DEFL_CACHE_WBACK
126 This option determines the default caching mode for the kernel.
128 Write-Back caching mode involves the all reads and writes causing
129 the affected cacheline to be read into the cache first before being
130 operated upon. Memory is not then updated by a write until the cache
131 is filled and a cacheline needs to be displaced from the cache to
132 make room. Only at that point is it written back.
134 Write-Behind caching is similar to Write-Back caching, except that a
135 write won't fetch a cacheline into the cache if there isn't already
136 one there; it will write directly to memory instead.
138 Write-Through caching only fetches cachelines from memory on a
139 read. Writes always get written directly to memory. If the affected
140 cacheline is also in cache, it will be updated too.
142 The final option is to turn of caching entirely.
144 Note that not all CPUs support Write-Behind caching. If the CPU on
145 which the kernel is running doesn't, it'll fall back to Write-Back
148 config FRV_DEFL_CACHE_WBACK
151 config FRV_DEFL_CACHE_WBEHIND
154 config FRV_DEFL_CACHE_WTHRU
157 config FRV_DEFL_CACHE_DISABLED
162 menu "CPU core support"
165 bool "Include FR401 core support"
169 This enables support for the FR401, FR401A and FR403 CPUs
172 bool "Include FR405 core support"
176 This enables support for the FR405 CPU
179 bool "Include FR451 core support"
182 This enables support for the FR451 CPU
184 config CPU_FR451_COMPILE
185 bool "Specifically compile for FR451 core"
186 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
189 This causes appropriate flags to be passed to the compiler to
190 optimise for the FR451 CPU
193 bool "Include FR551 core support"
197 This enables support for the FR555 CPU
199 config CPU_FR551_COMPILE
200 bool "Specifically compile for FR551 core"
201 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
204 This causes appropriate flags to be passed to the compiler to
205 optimise for the FR555 CPU
207 config FRV_L1_CACHE_SHIFT
209 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
210 default "6" if CPU_FR551
215 prompt "System support"
219 bool "MB93091 CPU board with or without motherboard"
222 bool "MB93093 PDK unit"
228 prompt "Motherboard support"
232 bool "Use the MB93090-MB00 motherboard"
234 Select this option if the MB93091 CPU board is going to be used with
235 a MB93090-MB00 VDK motherboard
238 bool "Use standalone"
240 Select this option if the MB93091 CPU board is going to be used
241 without a motherboard
247 prompt "GP-Relative data support"
250 This option controls what data, if any, should be placed in the GP
251 relative data sections. Using this means that the compiler can
252 generate accesses to the data using GR16-relative addressing which
253 is faster than absolute instructions and saves space (2 instructions
256 However, the GPREL region is limited in size because the immediate
257 value used in the load and store instructions is limited to a 12-bit
260 So if the linker starts complaining that accesses to GPREL data are
261 out of range, try changing this option from the default.
263 Note that modules will always be compiled with this feature disabled
264 as the module data will not be in range of the GP base address.
267 bool "Put data objects of up to 8 bytes into GP-REL"
270 bool "Put data objects of up to 4 bytes into GP-REL"
272 config GPREL_DATA_NONE
273 bool "Don't use GP-REL"
277 config FRV_ONCPU_SERIAL
278 bool "Use on-CPU serial ports"
284 depends on MB93090_MB00
287 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
288 onboard. If you have one of these boards and you wish to use the PCI
289 facilities, say Y here.
291 The PCI-HOWTO, available from
292 <http://www.tldp.org/docs.html#howto>, contains valuable
293 information about which PCI hardware does work under Linux and which
296 config RESERVE_DMA_COHERENT
297 bool "Reserve DMA coherent memory"
298 depends on PCI && !MMU
301 Many PCI drivers require access to uncached memory for DMA device
302 communications (such as is done with some Ethernet buffer rings). If
303 a fully featured MMU is available, this can be done through page
304 table settings, but if not, a region has to be set aside and marked
305 with a special DAMPR register.
307 Setting this option causes uClinux to set aside a portion of the
308 available memory for use in this manner. The memory will then be
309 unavailable for normal kernel use.
311 source "drivers/pci/Kconfig"
313 source "drivers/pcmcia/Kconfig"
315 #config MATH_EMULATION
316 # bool "Math emulation support (EXPERIMENTAL)"
317 # depends on EXPERIMENTAL
319 # At some point in the future, this will cause floating-point math
320 # instructions to be emulated by the kernel on machines that lack a
321 # floating-point math coprocessor. Thrill-seekers and chronically
322 # sleep-deprived psychotic hacker types can say Y now, everyone else
323 # should probably wait a while.
325 menu "Power management options"
326 source kernel/power/Kconfig
332 menu "Executable formats"
334 source "fs/Kconfig.binfmt"
340 source "drivers/Kconfig"
344 source "arch/frv/Kconfig.debug"
346 source "security/Kconfig"
348 source "crypto/Kconfig"