5 This option selects whether a 32-bit or a 64-bit kernel
8 menu "Processor support"
10 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"
60 # Until we have a choice of exclusive CPU types on 64-bit, we always
61 # use PPC_BOOK3S. On 32-bit, this is equivalent to 6xx which is
66 depends on PPC64 || 6xx
69 bool "Optimize for POWER4"
70 depends on PPC64 && PPC_BOOK3S
73 Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
74 The resulting binary will not work on POWER3 or RS64 processors
75 when compiled with binutils 2.15 or later.
79 depends on PPC64 && PPC_BOOK3S
80 default y if !POWER4_ONLY
83 depends on PPC64 && PPC_BOOK3S
87 bool "Optimize for Cell Broadband Engine"
88 depends on PPC64 && PPC_BOOK3S
90 Cause the compiler to optimize for the PPE of the Cell Broadband
91 Engine. This will make the code run considerably faster on Cell
92 but somewhat slower on other machines. This option only changes
93 the scheduling of instructions, not the selection of instructions
94 itself, so the resulting kernel will keep running on all other
95 machines. When building a kernel that is supposed to run only
96 on Cell, you should also select the POWER4_ONLY option.
98 # this is temp to handle compat with arch=ppc
103 select FSL_EMB_PERFMON
107 bool "e500mc Support"
117 depends on 40x || 44x
122 depends on E200 || E500 || 44x
127 depends on E200 || E500
130 config FSL_EMB_PERFMON
131 bool "Freescale Embedded Perfmon"
132 depends on E500 || PPC_83xx
134 This is the Performance Monitor support found on the e500 core
135 and some e300 cores (c3 and c4). Select this only if your
136 core supports the Embedded Performance Monitor APU
140 depends on 44x || E500 || PPC_86xx
141 default y if PHYS_64BIT
144 bool 'Large physical address support' if E500 || PPC_86xx
145 depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
147 This option enables kernel support for larger than 32-bit physical
148 addresses. This feature may not be available on all cores.
150 If you have more than 3.5GB of RAM or so, you also need to enable
151 SWIOTLB under Kernel Options for this to work. The actual number
152 is platform-dependent.
154 If in doubt, say N here.
157 bool "AltiVec Support"
158 depends on 6xx || POWER4
160 This option enables kernel support for the Altivec extensions to the
161 PowerPC processor. The kernel currently supports saving and restoring
162 altivec registers, and turning on the 'altivec enable' bit so user
163 processes can execute altivec instructions.
165 This option is only usefully if you have a processor that supports
166 altivec (G4, otherwise known as 74xx series), but does not have
167 any affect on a non-altivec cpu (it does, however add code to the
170 If in doubt, say Y here.
174 depends on POWER4 && ALTIVEC && PPC_FPU
177 This option enables kernel support for the Vector Scaler extensions
178 to the PowerPC processor. The kernel currently supports saving and
179 restoring VSX registers, and turning on the 'VSX enable' bit so user
180 processes can execute VSX instructions.
182 This option is only useful if you have a processor that supports
183 VSX (P7 and above), but does not have any affect on a non-VSX
184 CPUs (it does, however add code to the kernel).
186 If in doubt, say Y here.
190 depends on E200 || (E500 && !PPC_E500MC)
193 This option enables kernel support for the Signal Processing
194 Extensions (SPE) to the PowerPC processor. The kernel currently
195 supports saving and restoring SPE registers, and turning on the
196 'spe enable' bit so user processes can execute SPE instructions.
198 This option is only useful if you have a processor that supports
199 SPE (e500, otherwise known as 85xx series), but does not have any
200 effect on a non-spe cpu (it does, however add code to the kernel).
202 If in doubt, say Y here.
206 depends on 6xx || PPC64
209 config PPC_STD_MMU_32
211 depends on PPC_STD_MMU && PPC32
213 config PPC_STD_MMU_64
215 depends on PPC_STD_MMU && PPC64
217 config PPC_MMU_NOHASH
219 depends on !PPC_STD_MMU
221 config PPC_BOOK3E_MMU
227 default y if HUGETLB_PAGE || (PPC_STD_MMU_64 && PPC_64K_PAGES)
230 config VIRT_CPU_ACCOUNTING
231 bool "Deterministic task and CPU time accounting"
235 Select this option to enable more accurate task and CPU time
236 accounting. This is done by reading a CPU counter on each
237 kernel entry and exit and on transitions within the kernel
238 between system, softirq and hardirq state, so there is a
239 small performance impact. This also enables accounting of
240 stolen time on logically-partitioned systems running on
241 IBM POWER5-based machines.
243 If in doubt, say Y here.
246 depends on PPC_STD_MMU || FSL_BOOKE
247 bool "Symmetric multi-processing support"
249 This enables support for systems with more than one CPU. If you have
250 a system with only one CPU, say N. If you have a system with more
251 than one CPU, say Y. Note that the kernel does not currently
252 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
253 since they have inadequate hardware support for multiprocessor
256 If you say N here, the kernel will run on single and multiprocessor
257 machines, but will use only one CPU of a multiprocessor machine. If
258 you say Y here, the kernel will run on single-processor machines.
259 On a single-processor machine, the kernel will run faster if you say
262 If you don't know what to do here, say N.
265 int "Maximum number of CPUs (2-8192)"
268 default "32" if PPC64
271 config NOT_COHERENT_CACHE
273 depends on 4xx || 8xx || E200 || PPC_MPC512x
276 config CHECK_CACHE_COHERENCY