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
28 mainmenu "Fujitsu FR-V Kernel Configuration"
33 menu "Fujitsu FR-V system setup"
38 This options switches on and off support for the FR-V MMU
39 (effectively switching between vmlinux and uClinux). Not all FR-V
40 CPUs support this. Currently only the FR451 has a sufficiently
43 config FRV_OUTOFLINE_ATOMIC_OPS
44 bool "Out-of-line the FRV atomic operations"
47 Setting this option causes the FR-V atomic operations to be mostly
48 implemented out-of-line.
50 See Documentation/fujitsu/frv/atomic-ops.txt for more information.
53 bool "High memory support"
57 If you wish to use more than 256MB of memory with your MMU based
58 system, you will need to select this option. The kernel can only see
59 the memory between 0xC0000000 and 0xD0000000 directly... everything
62 The arch is, however, capable of supporting up to 3GB of SDRAM.
65 bool "Allocate page tables in highmem"
69 The VM uses one page of memory for each page table. For systems
70 with a lot of RAM, this can be wasteful of precious low memory.
71 Setting this option will put user-space page tables in high memory.
76 prompt "uClinux kernel load address"
78 default UCPAGE_OFFSET_C0000000
80 This option sets the base address for the uClinux kernel. The kernel
81 will rearrange the SDRAM layout to start at this address, and move
82 itself to start there. It must be greater than 0, and it must be
83 sufficiently less than 0xE0000000 that the SDRAM does not intersect
86 The base address must also be aligned such that the SDRAM controller
87 can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
89 config UCPAGE_OFFSET_20000000
92 config UCPAGE_OFFSET_40000000
95 config UCPAGE_OFFSET_60000000
98 config UCPAGE_OFFSET_80000000
101 config UCPAGE_OFFSET_A0000000
104 config UCPAGE_OFFSET_C0000000
105 bool "0xC0000000 (Recommended)"
109 config PROTECT_KERNEL
110 bool "Protect core kernel against userspace"
114 Selecting this option causes the uClinux kernel to change the
115 permittivity of DAMPR register covering the core kernel image to
116 prevent userspace accessing the underlying memory directly.
119 prompt "CPU Caching mode"
120 default FRV_DEFL_CACHE_WBACK
122 This option determines the default caching mode for the kernel.
124 Write-Back caching mode involves the all reads and writes causing
125 the affected cacheline to be read into the cache first before being
126 operated upon. Memory is not then updated by a write until the cache
127 is filled and a cacheline needs to be displaced from the cache to
128 make room. Only at that point is it written back.
130 Write-Behind caching is similar to Write-Back caching, except that a
131 write won't fetch a cacheline into the cache if there isn't already
132 one there; it will write directly to memory instead.
134 Write-Through caching only fetches cachelines from memory on a
135 read. Writes always get written directly to memory. If the affected
136 cacheline is also in cache, it will be updated too.
138 The final option is to turn of caching entirely.
140 Note that not all CPUs support Write-Behind caching. If the CPU on
141 which the kernel is running doesn't, it'll fall back to Write-Back
144 config FRV_DEFL_CACHE_WBACK
147 config FRV_DEFL_CACHE_WBEHIND
150 config FRV_DEFL_CACHE_WTHRU
153 config FRV_DEFL_CACHE_DISABLED
158 menu "CPU core support"
161 bool "Include FR401 core support"
165 This enables support for the FR401, FR401A and FR403 CPUs
168 bool "Include FR405 core support"
172 This enables support for the FR405 CPU
175 bool "Include FR451 core support"
178 This enables support for the FR451 CPU
180 config CPU_FR451_COMPILE
181 bool "Specifically compile for FR451 core"
182 depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
185 This causes appropriate flags to be passed to the compiler to
186 optimise for the FR451 CPU
189 bool "Include FR551 core support"
193 This enables support for the FR555 CPU
195 config CPU_FR551_COMPILE
196 bool "Specifically compile for FR551 core"
197 depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
200 This causes appropriate flags to be passed to the compiler to
201 optimise for the FR555 CPU
203 config FRV_L1_CACHE_SHIFT
205 default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
206 default "6" if CPU_FR551
211 prompt "System support"
215 bool "MB93091 CPU board with or without motherboard"
218 bool "MB93093 PDK unit"
224 prompt "Motherboard support"
228 bool "Use the MB93090-MB00 motherboard"
230 Select this option if the MB93091 CPU board is going to be used with
231 a MB93090-MB00 VDK motherboard
234 bool "Use standalone"
236 Select this option if the MB93091 CPU board is going to be used
237 without a motherboard
243 prompt "GP-Relative data support"
246 This option controls what data, if any, should be placed in the GP
247 relative data sections. Using this means that the compiler can
248 generate accesses to the data using GR16-relative addressing which
249 is faster than absolute instructions and saves space (2 instructions
252 However, the GPREL region is limited in size because the immediate
253 value used in the load and store instructions is limited to a 12-bit
256 So if the linker starts complaining that accesses to GPREL data are
257 out of range, try changing this option from the default.
259 Note that modules will always be compiled with this feature disabled
260 as the module data will not be in range of the GP base address.
263 bool "Put data objects of up to 8 bytes into GP-REL"
266 bool "Put data objects of up to 4 bytes into GP-REL"
268 config GPREL_DATA_NONE
269 bool "Don't use GP-REL"
273 config FRV_ONCPU_SERIAL
274 bool "Use on-CPU serial ports"
280 depends on MB93090_MB00
283 Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
284 onboard. If you have one of these boards and you wish to use the PCI
285 facilities, say Y here.
287 The PCI-HOWTO, available from
288 <http://www.tldp.org/docs.html#howto>, contains valuable
289 information about which PCI hardware does work under Linux and which
292 config RESERVE_DMA_COHERENT
293 bool "Reserve DMA coherent memory"
294 depends on PCI && !MMU
297 Many PCI drivers require access to uncached memory for DMA device
298 communications (such as is done with some Ethernet buffer rings). If
299 a fully featured MMU is available, this can be done through page
300 table settings, but if not, a region has to be set aside and marked
301 with a special DAMPR register.
303 Setting this option causes uClinux to set aside a portion of the
304 available memory for use in this manner. The memory will then be
305 unavailable for normal kernel use.
307 source "drivers/pci/Kconfig"
309 source "drivers/pcmcia/Kconfig"
311 #config MATH_EMULATION
312 # bool "Math emulation support (EXPERIMENTAL)"
313 # depends on EXPERIMENTAL
315 # At some point in the future, this will cause floating-point math
316 # instructions to be emulated by the kernel on machines that lack a
317 # floating-point math coprocessor. Thrill-seekers and chronically
318 # sleep-deprived psychotic hacker types can say Y now, everyone else
319 # should probably wait a while.
321 menu "Power management options"
322 source kernel/power/Kconfig
328 menu "Executable formats"
330 source "fs/Kconfig.binfmt"
336 source "drivers/Kconfig"
340 source "arch/frv/Kconfig.debug"
342 source "security/Kconfig"
344 source "crypto/Kconfig"