/*  $NetBSD: param.h,v 1.3 2006/08/28 13:43:35 yamt Exp $ */

#define _MACHINE  amd64
#define MACHINE   "amd64"
#define _MACHINE_ARCH x86_64
#define MACHINE_ARCH  "x86_64"
#define MID_MACHINE MID_X86_64

/*
 * Round p (pointer or byte index) up to a correctly-aligned value
 * for all data types (int, long, ...).   The result is u_int and
 * must be cast to any desired pointer type.
 *
 * ALIGNED_POINTER is a boolean macro that checks whether an address
 * is valid to fetch data elements of type t from on this architecture.
 * This does not reflect the optimal alignment, just the possibility
 * (within reasonable limits).
 *
 */
#define ALIGNBYTES    (sizeof(INT64) - 1)
#define ALIGN(p)    (((UINT64)(p) + ALIGNBYTES) &~ALIGNBYTES)
#define ALIGNED_POINTER(p,t)  1

#define ALIGNBYTES32    (sizeof(INT32) - 1)
#define ALIGN32(p)    (((UINT32)(p) + ALIGNBYTES32) &~ALIGNBYTES32)

#define PGSHIFT   12    /* LOG2(NBPG) */
#define NBPG    (1 << PGSHIFT)  /* bytes/page */
#define PGOFSET   (NBPG-1)  /* byte offset into page */
#define NPTEPG    (NBPG/(sizeof (pt_entry_t)))

/*
 * XXXfvdl change this (after bootstrap) to take # of bits from
 * config info into account.
 */
#define KERNBASE  0xffffffff80000000 /* start of kernel virtual space */
#define KERNTEXTOFF 0xffffffff80100000 /* start of kernel text */
#define BTOPKERNBASE  ((u_long)KERNBASE >> PGSHIFT)

#define KERNTEXTOFF_HI  0xffffffff
#define KERNTEXTOFF_LO  0x80100000

#define KERNBASE_HI 0xffffffff
#define KERNBASE_LO 0x80000000

#define DEV_BSHIFT  9   /* log2(DEV_BSIZE) */
#define DEV_BSIZE (1 << DEV_BSHIFT)
#define BLKDEV_IOSIZE 2048
#ifndef MAXPHYS
#define MAXPHYS   (64 * 1024) /* max raw I/O transfer size */
#endif

#define SSIZE   1   /* initial stack size/NBPG */
#define SINCR   1   /* increment of stack/NBPG */
#define UPAGES    5   /* pages of u-area */
#define USPACE    (UPAGES * NBPG) /* total size of u-area */

#ifndef MSGBUFSIZE
#define MSGBUFSIZE  4*NBPG    /* default message buffer size */
#endif

/*
 * Constants related to network buffer management.
 * MCLBYTES must be no larger than NBPG (the software page size), and,
 * on machines that exchange pages of input or output buffers with mbuf
 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 * of the hardware page size.
 */
#define MSIZE   512   /* size of an mbuf */

#ifndef MCLSHIFT
#define MCLSHIFT  11    /* convert bytes to m_buf clusters */
          /* 2K cluster can hold Ether frame */
#endif  /* MCLSHIFT */

#define MCLBYTES  (1 << MCLSHIFT) /* size of a m_buf cluster */

#ifndef NMBCLUSTERS
  #ifdef GATEWAY
    #define NMBCLUSTERS 4096    /* map size, max cluster allocation */
  #else
    #define NMBCLUSTERS 2048    /* map size, max cluster allocation */
  #endif
#endif

#ifndef NFS_RSIZE
  #define NFS_RSIZE       32768
#endif
#ifndef NFS_WSIZE
  #define NFS_WSIZE       32768
#endif

/*
 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
 * logical pages.
 */
//#define NKMEMPAGES_MIN_DEFAULT  ((8 * 1024 * 1024) >> PAGE_SHIFT)
//#define NKMEMPAGES_MAX_DEFAULT  ((1 *1024 * 1024 * 1024) >> PAGE_SHIFT)

/*
 * XXXfvdl the PD* stuff is different from i386.
 */
/*
 * Mach derived conversion macros
 */
#ifdef  MACH_DCM
  #define x86_round_pdr(x)  ((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
  #define x86_trunc_pdr(x)  ((unsigned long)(x) & ~(NBPD_L2 - 1))
  #define x86_btod(x)       ((unsigned long)(x) >> L2_SHIFT)
  #define x86_dtob(x)       ((unsigned long)(x) << L2_SHIFT)
#endif  // MACH_DCM

#define x86_round_page(x) ((((ULONG32)(x)) + PGOFSET) & ~PGOFSET)
#define x86_trunc_page(x) ((ULONG32)(x) & ~PGOFSET)
#define x86_btop(x)   ((ULONG32)(x) >> PGSHIFT)
#define x86_ptob(x)   ((ULONG32)(x) << PGSHIFT)

#define btop(x)       x86_btop(x)
#define ptob(x)       x86_ptob(x)
#define round_pdr(x)      x86_round_pdr(x)

#define mstohz(ms) ((ms + 0UL) * hz / 1000)