4 select HAVE_PERF_COUNTERS
6 This option selects whether a 32-bit or a 64-bit kernel
9 menu "Processor support"
11 prompt "Processor Type"
14 There are five families of 32 bit PowerPC chips supported.
15 The most common ones are the desktop and server CPUs (601, 603,
16 604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
17 embedded 512x/52xx/82xx/83xx/86xx counterparts.
18 The other embeeded parts, namely 4xx, 8xx, e200 (55xx) and e500
19 (85xx) each form a family of their own that is not compatible
22 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
25 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
67 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
70 bool "Optimize for POWER4"
71 depends on PPC64 && PPC_BOOK3S
74 Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
75 The resulting binary will not work on POWER3 or RS64 processors
76 when compiled with binutils 2.15 or later.
80 depends on PPC32 && PPC_BOOK3S
84 depends on PPC64 && PPC_BOOK3S
85 default y if !POWER4_ONLY
88 depends on PPC64 && PPC_BOOK3S
92 bool "Optimize for Cell Broadband Engine"
93 depends on PPC64 && PPC_BOOK3S
95 Cause the compiler to optimize for the PPE of the Cell Broadband
96 Engine. This will make the code run considerably faster on Cell
97 but somewhat slower on other machines. This option only changes
98 the scheduling of instructions, not the selection of instructions
99 itself, so the resulting kernel will keep running on all other
100 machines. When building a kernel that is supposed to run only
101 on Cell, you should also select the POWER4_ONLY option.
103 # this is temp to handle compat with arch=ppc
108 select FSL_EMB_PERFMON
112 bool "e500mc Support"
122 depends on 40x || 44x
127 depends on E200 || E500 || 44x
132 depends on E200 || E500
135 config FSL_EMB_PERFMON
136 bool "Freescale Embedded Perfmon"
137 depends on E500 || PPC_83xx
139 This is the Performance Monitor support found on the e500 core
140 and some e300 cores (c3 and c4). Select this only if your
141 core supports the Embedded Performance Monitor APU
145 depends on 44x || E500 || PPC_86xx
146 default y if PHYS_64BIT
149 bool 'Large physical address support' if E500 || PPC_86xx
150 depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
152 This option enables kernel support for larger than 32-bit physical
153 addresses. This feature may not be available on all cores.
155 If you have more than 3.5GB of RAM or so, you also need to enable
156 SWIOTLB under Kernel Options for this to work. The actual number
157 is platform-dependent.
159 If in doubt, say N here.
162 bool "AltiVec Support"
163 depends on 6xx || POWER4
165 This option enables kernel support for the Altivec extensions to the
166 PowerPC processor. The kernel currently supports saving and restoring
167 altivec registers, and turning on the 'altivec enable' bit so user
168 processes can execute altivec instructions.
170 This option is only usefully if you have a processor that supports
171 altivec (G4, otherwise known as 74xx series), but does not have
172 any affect on a non-altivec cpu (it does, however add code to the
175 If in doubt, say Y here.
179 depends on POWER4 && ALTIVEC && PPC_FPU
182 This option enables kernel support for the Vector Scaler extensions
183 to the PowerPC processor. The kernel currently supports saving and
184 restoring VSX registers, and turning on the 'VSX enable' bit so user
185 processes can execute VSX instructions.
187 This option is only useful if you have a processor that supports
188 VSX (P7 and above), but does not have any affect on a non-VSX
189 CPUs (it does, however add code to the kernel).
191 If in doubt, say Y here.
195 depends on E200 || (E500 && !PPC_E500MC)
198 This option enables kernel support for the Signal Processing
199 Extensions (SPE) to the PowerPC processor. The kernel currently
200 supports saving and restoring SPE registers, and turning on the
201 'spe enable' bit so user processes can execute SPE instructions.
203 This option is only useful if you have a processor that supports
204 SPE (e500, otherwise known as 85xx series), but does not have any
205 effect on a non-spe cpu (it does, however add code to the kernel).
207 If in doubt, say Y here.
211 depends on PPC_BOOK3S
213 config PPC_STD_MMU_32
215 depends on PPC_STD_MMU && PPC32
217 config PPC_STD_MMU_64
219 depends on PPC_STD_MMU && PPC64
221 config PPC_MMU_NOHASH
223 depends on !PPC_STD_MMU
225 config PPC_BOOK3E_MMU
231 default y if HUGETLB_PAGE || (PPC_STD_MMU_64 && PPC_64K_PAGES)
234 config VIRT_CPU_ACCOUNTING
235 bool "Deterministic task and CPU time accounting"
239 Select this option to enable more accurate task and CPU time
240 accounting. This is done by reading a CPU counter on each
241 kernel entry and exit and on transitions within the kernel
242 between system, softirq and hardirq state, so there is a
243 small performance impact. This also enables accounting of
244 stolen time on logically-partitioned systems running on
245 IBM POWER5-based machines.
247 If in doubt, say Y here.
250 depends on PPC_STD_MMU || FSL_BOOKE
251 bool "Symmetric multi-processing support"
253 This enables support for systems with more than one CPU. If you have
254 a system with only one CPU, say N. If you have a system with more
255 than one CPU, say Y. Note that the kernel does not currently
256 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
257 since they have inadequate hardware support for multiprocessor
260 If you say N here, the kernel will run on single and multiprocessor
261 machines, but will use only one CPU of a multiprocessor machine. If
262 you say Y here, the kernel will run on single-processor machines.
263 On a single-processor machine, the kernel will run faster if you say
266 If you don't know what to do here, say N.
269 int "Maximum number of CPUs (2-8192)"
272 default "32" if PPC64
275 config NOT_COHERENT_CACHE
277 depends on 4xx || 8xx || E200 || PPC_MPC512x
280 config CHECK_CACHE_COHERENCY