arch/powerpc/platforms/Kconfig.cputype

   1 config PPC64
   2         bool "64-bit kernel"
   3         default n
   4         help
   5           This option selects whether a 32-bit or a 64-bit kernel
   6           will be built.
   7
   8 menu "Processor support"
   9 choice
  10         prompt "Processor Type"
  11         depends on PPC32
  12         default 6xx
  13         help
  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
  20           with the others.
  21
  22           If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
  23
  24 config 6xx
  25         bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
  26         select PPC_FPU
  27
  28 config PPC_85xx
  29         bool "Freescale 85xx"
  30         select E500
  31         select FSL_SOC
  32         select MPC85xx
  33
  34 config PPC_8xx
  35         bool "Freescale 8xx"
  36         select FSL_SOC
  37         select 8xx
  38         select PPC_LIB_RHEAP
  39
  40 config 40x
  41         bool "AMCC 40x"
  42         select PPC_DCR_NATIVE
  43         select PPC_UDBG_16550
  44         select 4xx_SOC
  45         select PPC_PCI_CHOICE
  46
  47 config 44x
  48         bool "AMCC 44x"
  49         select PPC_DCR_NATIVE
  50         select PPC_UDBG_16550
  51         select 4xx_SOC
  52         select PPC_PCI_CHOICE
  53         select PHYS_64BIT
  54
  55 config E200
  56         bool "Freescale e200"
  57
  58 endchoice
  59
  60 config POWER4_ONLY
  61         bool "Optimize for POWER4"
  62         depends on PPC64
  63         default n
  64         ---help---
  65           Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
  66           The resulting binary will not work on POWER3 or RS64 processors
  67           when compiled with binutils 2.15 or later.
  68
  69 config POWER3
  70         bool
  71         depends on PPC64
  72         default y if !POWER4_ONLY
  73
  74 config POWER4
  75         depends on PPC64
  76         def_bool y
  77
  78 config TUNE_CELL
  79         bool "Optimize for Cell Broadband Engine"
  80         depends on PPC64
  81         help
  82           Cause the compiler to optimize for the PPE of the Cell Broadband
  83           Engine. This will make the code run considerably faster on Cell
  84           but somewhat slower on other machines. This option only changes
  85           the scheduling of instructions, not the selection of instructions
  86           itself, so the resulting kernel will keep running on all other
  87           machines. When building a kernel that is supposed to run only
  88           on Cell, you should also select the POWER4_ONLY option.
  89
  90 # this is temp to handle compat with arch=ppc
  91 config 8xx
  92         bool
  93
  94 config E500
  95         select FSL_EMB_PERFMON
  96         bool
  97
  98 config PPC_E500MC
  99         bool "e500mc Support"
 100         select PPC_FPU
 101         depends on E500
 102
 103 config PPC_FPU
 104         bool
 105         default y if PPC64
 106
 107 config 4xx
 108         bool
 109         depends on 40x || 44x
 110         default y
 111
 112 config BOOKE
 113         bool
 114         depends on E200 || E500 || 44x
 115         default y
 116
 117 config FSL_BOOKE
 118         bool
 119         depends on E200 || E500
 120         default y
 121
 122 config FSL_EMB_PERFMON
 123         bool "Freescale Embedded Perfmon"
 124         depends on E500 || PPC_83xx
 125         help
 126           This is the Performance Monitor support found on the e500 core
 127           and some e300 cores (c3 and c4).  Select this only if your
 128           core supports the Embedded Performance Monitor APU
 129
 130 config PTE_64BIT
 131         bool
 132         depends on 44x || E500 || PPC_86xx
 133         default y if PHYS_64BIT
 134
 135 config PHYS_64BIT
 136         bool 'Large physical address support' if E500 || PPC_86xx
 137         depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
 138         ---help---
 139           This option enables kernel support for larger than 32-bit physical
 140           addresses.  This feature may not be available on all cores.
 141
 142           If you have more than 3.5GB of RAM or so, you also need to enable
 143           SWIOTLB under Kernel Options for this to work.  The actual number
 144           is platform-dependent.
 145
 146           If in doubt, say N here.
 147
 148 config ALTIVEC
 149         bool "AltiVec Support"
 150         depends on CLASSIC32 || POWER4
 151         ---help---
 152           This option enables kernel support for the Altivec extensions to the
 153           PowerPC processor. The kernel currently supports saving and restoring
 154           altivec registers, and turning on the 'altivec enable' bit so user
 155           processes can execute altivec instructions.
 156
 157           This option is only usefully if you have a processor that supports
 158           altivec (G4, otherwise known as 74xx series), but does not have
 159           any affect on a non-altivec cpu (it does, however add code to the
 160           kernel).
 161
 162           If in doubt, say Y here.
 163
 164 config VSX
 165         bool "VSX Support"
 166         depends on POWER4 && ALTIVEC && PPC_FPU
 167         ---help---
 168
 169           This option enables kernel support for the Vector Scaler extensions
 170           to the PowerPC processor. The kernel currently supports saving and
 171           restoring VSX registers, and turning on the 'VSX enable' bit so user
 172           processes can execute VSX instructions.
 173
 174           This option is only useful if you have a processor that supports
 175           VSX (P7 and above), but does not have any affect on a non-VSX
 176           CPUs (it does, however add code to the kernel).
 177
 178           If in doubt, say Y here.
 179
 180 config SPE
 181         bool "SPE Support"
 182         depends on E200 || (E500 && !PPC_E500MC)
 183         default y
 184         ---help---
 185           This option enables kernel support for the Signal Processing
 186           Extensions (SPE) to the PowerPC processor. The kernel currently
 187           supports saving and restoring SPE registers, and turning on the
 188           'spe enable' bit so user processes can execute SPE instructions.
 189
 190           This option is only useful if you have a processor that supports
 191           SPE (e500, otherwise known as 85xx series), but does not have any
 192           effect on a non-spe cpu (it does, however add code to the kernel).
 193
 194           If in doubt, say Y here.
 195
 196 config PPC_STD_MMU
 197         bool
 198         depends on 6xx || POWER3 || POWER4 || PPC64
 199         default y
 200
 201 config PPC_STD_MMU_32
 202         def_bool y
 203         depends on PPC_STD_MMU && PPC32
 204
 205 config PPC_MM_SLICES
 206         bool
 207         default y if HUGETLB_PAGE || PPC_64K_PAGES
 208         default n
 209
 210 config VIRT_CPU_ACCOUNTING
 211         bool "Deterministic task and CPU time accounting"
 212         depends on PPC64
 213         default y
 214         help
 215           Select this option to enable more accurate task and CPU time
 216           accounting.  This is done by reading a CPU counter on each
 217           kernel entry and exit and on transitions within the kernel
 218           between system, softirq and hardirq state, so there is a
 219           small performance impact.  This also enables accounting of
 220           stolen time on logically-partitioned systems running on
 221           IBM POWER5-based machines.
 222
 223           If in doubt, say Y here.
 224
 225 config SMP
 226         depends on PPC_STD_MMU
 227         bool "Symmetric multi-processing support"
 228         ---help---
 229           This enables support for systems with more than one CPU. If you have
 230           a system with only one CPU, say N. If you have a system with more
 231           than one CPU, say Y.  Note that the kernel does not currently
 232           support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
 233           since they have inadequate hardware support for multiprocessor
 234           operation.
 235
 236           If you say N here, the kernel will run on single and multiprocessor
 237           machines, but will use only one CPU of a multiprocessor machine. If
 238           you say Y here, the kernel will run on single-processor machines.
 239           On a single-processor machine, the kernel will run faster if you say
 240           N here.
 241
 242           If you don't know what to do here, say N.
 243
 244 config NR_CPUS
 245         int "Maximum number of CPUs (2-1024)"
 246         range 2 1024
 247         depends on SMP
 248         default "32" if PPC64
 249         default "4"
 250
 251 config NOT_COHERENT_CACHE
 252         bool
 253         depends on 4xx || 8xx || E200 || PPC_MPC512x
 254         default y
 255
 256 config CHECK_CACHE_COHERENCY
 257         bool
 258
 259 endmenu