arch/metag/mm/Kconfig

   1 menu "Memory management options"
   2
   3 config PAGE_OFFSET
   4         hex "Kernel page offset address"
   5         default "0x40000000"
   6         help
   7           This option allows you to set the virtual address at which the
   8           kernel will be mapped to.
   9 endmenu
  10
  11 config KERNEL_4M_PAGES
  12         bool "Map kernel with 4MB pages"
  13         depends on METAG_META21_MMU
  14         default y
  15         help
  16           Map the kernel with large pages to reduce TLB pressure.
  17
  18 choice
  19         prompt "User page size"
  20         default PAGE_SIZE_4K
  21
  22 config PAGE_SIZE_4K
  23         bool "4kB"
  24         help
  25           This is the default page size used by all Meta cores.
  26
  27 config PAGE_SIZE_8K
  28         bool "8kB"
  29         depends on METAG_META21_MMU
  30         help
  31           This enables 8kB pages as supported by Meta 2.x and later MMUs.
  32
  33 config PAGE_SIZE_16K
  34         bool "16kB"
  35         depends on METAG_META21_MMU
  36         help
  37           This enables 16kB pages as supported by Meta 2.x and later MMUs.
  38
  39 endchoice
  40
  41 config NUMA
  42         bool "Non Uniform Memory Access (NUMA) Support"
  43         select ARCH_WANT_NUMA_VARIABLE_LOCALITY
  44         help
  45           Some Meta systems have MMU-mappable on-chip memories with
  46           lower latencies than main memory. This enables support for
  47           these blocks by binding them to nodes and allowing
  48           memory policies to be used for prioritizing and controlling
  49           allocation behaviour.
  50
  51 config FORCE_MAX_ZONEORDER
  52         int "Maximum zone order"
  53         range 10 32
  54         default "10"
  55         help
  56           The kernel memory allocator divides physically contiguous memory
  57           blocks into "zones", where each zone is a power of two number of
  58           pages.  This option selects the largest power of two that the kernel
  59           keeps in the memory allocator.  If you need to allocate very large
  60           blocks of physically contiguous memory, then you may need to
  61           increase this value.
  62
  63           This config option is actually maximum order plus one. For example,
  64           a value of 11 means that the largest free memory block is 2^10 pages.
  65
  66           The page size is not necessarily 4KB.  Keep this in mind
  67           when choosing a value for this option.
  68
  69 config METAG_L2C
  70         bool "Level 2 Cache Support"
  71         depends on METAG_META21
  72         help
  73           Press y here to enable support for the Meta Level 2 (L2) cache. This
  74           will enable the cache at start up if it hasn't already been enabled
  75           by the bootloader.
  76
  77           If the bootloader enables the L2 you must press y here to ensure the
  78           kernel takes the appropriate actions to keep the cache coherent.
  79
  80 config NODES_SHIFT
  81         int
  82         default "1"
  83         depends on NEED_MULTIPLE_NODES
  84
  85 config ARCH_FLATMEM_ENABLE
  86         def_bool y
  87         depends on !NUMA
  88
  89 config ARCH_SPARSEMEM_ENABLE
  90         def_bool y
  91         select SPARSEMEM_STATIC
  92
  93 config ARCH_SPARSEMEM_DEFAULT
  94         def_bool y
  95
  96 config ARCH_SELECT_MEMORY_MODEL
  97         def_bool y
  98
  99 config SYS_SUPPORTS_HUGETLBFS
 100         def_bool y
 101         depends on METAG_META21_MMU
 102
 103 choice
 104         prompt "HugeTLB page size"
 105         depends on METAG_META21_MMU && HUGETLB_PAGE
 106         default HUGETLB_PAGE_SIZE_1M
 107
 108 config HUGETLB_PAGE_SIZE_8K
 109         bool "8kB"
 110         depends on PAGE_SIZE_4K
 111
 112 config HUGETLB_PAGE_SIZE_16K
 113         bool "16kB"
 114         depends on PAGE_SIZE_4K || PAGE_SIZE_8K
 115
 116 config HUGETLB_PAGE_SIZE_32K
 117         bool "32kB"
 118
 119 config HUGETLB_PAGE_SIZE_64K
 120         bool "64kB"
 121
 122 config HUGETLB_PAGE_SIZE_128K
 123         bool "128kB"
 124
 125 config HUGETLB_PAGE_SIZE_256K
 126         bool "256kB"
 127
 128 config HUGETLB_PAGE_SIZE_512K
 129         bool "512kB"
 130
 131 config HUGETLB_PAGE_SIZE_1M
 132         bool "1MB"
 133
 134 config HUGETLB_PAGE_SIZE_2M
 135         bool "2MB"
 136
 137 config HUGETLB_PAGE_SIZE_4M
 138         bool "4MB"
 139
 140 endchoice
 141
 142 config METAG_COREMEM
 143         bool
 144         default y if SUSPEND
 145
 146 source "mm/Kconfig"