sys/arch/mips/include/mips_param.h

   1 /*      $NetBSD: mips_param.h,v 1.25 2009/08/13 05:15:09 matt Exp $     */
   2
   3 #ifdef _KERNEL
   4 #include <machine/cpu.h>
   5 #endif
   6
   7 /*
   8  * No reason this can't be common
   9  */
  10 #if defined(__MIPSEB__)
  11 # if defined(__mips_n32) || defined(__mips_n64)
  12 #  define       _MACHINE_ARCH   mips64eb
  13 #  define       MACHINE_ARCH    "mips64eb"
  14 #  define       _MACHINE32_ARCH mipseb
  15 #  define       MACHINE32_ARCH  "mipseb"
  16 # else
  17 #  define       _MACHINE_ARCH   mipseb
  18 #  define       MACHINE_ARCH    "mipseb"
  19 # endif
  20 #elif defined(__MIPSEL__)
  21 # if defined(__mips_n32) || defined(__mips_n64)
  22 #  define       _MACHINE_ARCH   mips64el
  23 #  define       MACHINE_ARCH    "mips64el"
  24 #  define       _MACHINE32_ARCH mipsel
  25 #  define       MACHINE32_ARCH  "mipsel"
  26 # else
  27 #  define       _MACHINE_ARCH   mipsel
  28 #  define       MACHINE_ARCH    "mipsel"
  29 #endif
  30 #else
  31 #error neither __MIPSEL__ nor __MIPSEB__ are defined.
  32 #endif
  33
  34 /*
  35  * On mips, UPAGES is fixed by sys/arch/mips/mips/locore code
  36  * to be the number of per-process-wired kernel-stack pages/PTES.
  37  */
  38
  39 #define SSIZE           1               /* initial stack size/NBPG */
  40 #define SINCR           1               /* increment of stack/NBPG */
  41
  42 #ifdef ENABLE_MIPS_16KB_PAGE
  43 #define UPAGES          1               /* pages of u-area */
  44 #define USPACE          (UPAGES*NBPG)   /* size of u-area in bytes */
  45 #elif defined(ENABLE_MIPS_4KB_PAGE) || 1
  46 #define UPAGES          2               /* pages of u-area */
  47 #define USPACE          (UPAGES*NBPG)   /* size of u-area in bytes */
  48 #else
  49 #error ENABLE_MIPS_xKB_PAGE not defined
  50 #endif
  51
  52 #ifndef MSGBUFSIZE
  53 #define MSGBUFSIZE      NBPG            /* default message buffer size */
  54 #endif
  55
  56 /*
  57  * Round p (pointer or byte index) up to a correctly-aligned value for all
  58  * data types (int, long, ...).   The result is u_int and must be cast to
  59  * any desired pointer type.
  60  *
  61  * ALIGNED_POINTER is a boolean macro that checks whether an address
  62  * is valid to fetch data elements of type t from on this architecture.
  63  * This does not reflect the optimal alignment, just the possibility
  64  * (within reasonable limits).
  65  *
  66  */
  67 #define ALIGNBYTES      7
  68 #define ALIGN(p)        (((uintptr_t)(p) + ALIGNBYTES) & ~ALIGNBYTES)
  69 #define ALIGNED_POINTER(p,t)    ((((uintptr_t)(p)) & (sizeof(t)-1)) == 0)
  70
  71 #ifdef ENABLE_MIPS_16KB_PAGE
  72 #define NBPG            16384           /* bytes/page */
  73 #define PGSHIFT         14              /* LOG2(NBPG) */
  74 #else
  75 #define NBPG            4096            /* bytes/page */
  76 #define PGSHIFT         12              /* LOG2(NBPG) */
  77 #endif
  78 #define PGOFSET         (NBPG-1)        /* byte offset into page */
  79 #define NPTEPG          (NBPG/4)
  80
  81 #define NBSEG           (NBPG*NPTEPG)   /* bytes/segment */
  82 #define SEGOFSET        (NBSEG-1)       /* byte offset into segment */
  83 #define SEGSHIFT        (2*PGSHIFT-2)   /* LOG2(NBSEG) */
  84
  85 /*
  86  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
  87  * logical pages.
  88  */
  89 #define NKMEMPAGES_MIN_DEFAULT  ((8 * 1024 * 1024) >> PAGE_SHIFT)
  90 #define NKMEMPAGES_MAX_DEFAULT  ((128 * 1024 * 1024) >> PAGE_SHIFT)
  91
  92 /*
  93  * Mach derived conversion macros
  94  */
  95 #define mips_round_page(x)      ((((uintptr_t)(x)) + NBPG - 1) & ~(NBPG-1))
  96 #define mips_trunc_page(x)      ((uintptr_t)(x) & ~(NBPG-1))
  97 #define mips_btop(x)            ((paddr_t)(x) >> PGSHIFT)
  98 #define mips_ptob(x)            ((paddr_t)(x) << PGSHIFT)
  99
 100 #ifdef __MIPSEL__
 101 #define MID_MACHINE     MID_PMAX        /* MID_PMAX (little-endian) */
 102 #endif
 103 #ifdef __MIPSEB__
 104 #define MID_MACHINE     MID_MIPS        /* MID_MIPS (big-endian) */
 105 #endif
 106
 107 /*
 108  * Constants related to network buffer management.
 109  * MCLBYTES must be no larger than NBPG (the software page size), and,
 110  * on machines that exchange pages of input or output buffers with mbuf
 111  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 112  * of the hardware page size.
 113  */
 114 #ifndef MSIZE
 115 #ifdef _LP64
 116 #define MSIZE           512             /* size of an mbuf */
 117 #else
 118 #define MSIZE           256             /* size of an mbuf */
 119 #endif
 120
 121 #ifndef MCLSHIFT
 122 # define MCLSHIFT       11              /* convert bytes to m_buf clusters */
 123 #endif  /* MCLSHIFT */
 124
 125 #define MCLBYTES        (1 << MCLSHIFT) /* size of a m_buf cluster */
 126
 127 #ifndef NMBCLUSTERS
 128 #if defined(_KERNEL_OPT)
 129 #include "opt_gateway.h"
 130 #endif
 131
 132 #ifdef GATEWAY
 133 #define NMBCLUSTERS     2048            /* map size, max cluster allocation */
 134 #else
 135 #define NMBCLUSTERS     1024            /* map size, max cluster allocation */
 136 #endif
 137 #endif
 138 #endif