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param.h revision 1.10 
      1 /*	$NetBSD: param.h,v 1.10 2008/12/20 12:42:36 ad Exp $	*/
      2 
      3 #ifdef __x86_64__
      4 
      5 #ifdef _KERNEL
      6 #include <machine/cpu.h>
      7 #endif
      8 
      9 #define	_MACHINE	amd64
     10 #define	MACHINE		"amd64"
     11 #define	_MACHINE_ARCH	x86_64
     12 #define	MACHINE_ARCH	"x86_64"
     13 #define MID_MACHINE	MID_X86_64
     14 
     15 /*
     16  * Round p (pointer or byte index) up to a correctly-aligned value
     17  * for all data types (int, long, ...).   The result is u_int and
     18  * must be cast to any desired pointer type.
     19  *
     20  * ALIGNED_POINTER is a boolean macro that checks whether an address
     21  * is valid to fetch data elements of type t from on this architecture.
     22  * This does not reflect the optimal alignment, just the possibility
     23  * (within reasonable limits).
     24  *
     25  */
     26 #define ALIGNBYTES		(sizeof(long) - 1)
     27 #define ALIGN(p)		(((u_long)(p) + ALIGNBYTES) &~ALIGNBYTES)
     28 #define ALIGNED_POINTER(p,t)	1
     29 
     30 #define ALIGNBYTES32		(sizeof(int) - 1)
     31 #define ALIGN32(p)		(((u_long)(p) + ALIGNBYTES32) &~ALIGNBYTES32)
     32 
     33 #define	PGSHIFT		12		/* LOG2(NBPG) */
     34 #define	NBPG		(1 << PGSHIFT)	/* bytes/page */
     35 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
     36 #define	NPTEPG		(NBPG/(sizeof (pt_entry_t)))
     37 
     38 /*
     39  * XXXfvdl change this (after bootstrap) to take # of bits from
     40  * config info into account.
     41  */
     42 #define	KERNBASE	0xffffffff80000000 /* start of kernel virtual space */
     43 #define	KERNTEXTOFF	0xffffffff80100000 /* start of kernel text */
     44 #define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
     45 
     46 #define KERNTEXTOFF_HI	0xffffffff
     47 #define KERNTEXTOFF_LO	0x80100000
     48 
     49 #define KERNBASE_HI	0xffffffff
     50 #define KERNBASE_LO	0x80000000
     51 
     52 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     53 #define	DEV_BSIZE	(1 << DEV_BSHIFT)
     54 #define	BLKDEV_IOSIZE	2048
     55 #ifndef	MAXPHYS
     56 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
     57 #endif
     58 
     59 #define	SSIZE		1		/* initial stack size/NBPG */
     60 #define	SINCR		1		/* increment of stack/NBPG */
     61 #ifdef DIAGNOSTIC
     62 #define	UPAGES		4		/* pages of u-area (1 for redzone) */
     63 #else
     64 #define	UPAGES		3		/* pages of u-area */
     65 #endif
     66 #define	USPACE		(UPAGES * NBPG)	/* total size of u-area */
     67 #define	INTRSTACKSIZE	4096
     68 
     69 #ifndef MSGBUFSIZE
     70 #define MSGBUFSIZE	8*NBPG		/* default message buffer size */
     71 #endif
     72 
     73 /*
     74  * Constants related to network buffer management.
     75  * MCLBYTES must be no larger than NBPG (the software page size), and,
     76  * on machines that exchange pages of input or output buffers with mbuf
     77  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     78  * of the hardware page size.
     79  */
     80 #define	MSIZE		512		/* size of an mbuf */
     81 
     82 #ifndef MCLSHIFT
     83 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
     84 					/* 2K cluster can hold Ether frame */
     85 #endif	/* MCLSHIFT */
     86 
     87 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
     88 
     89 #ifndef NMBCLUSTERS
     90 #if defined(_KERNEL_OPT)
     91 #include "opt_gateway.h"
     92 #endif
     93 
     94 #ifdef GATEWAY
     95 #define	NMBCLUSTERS	4096		/* map size, max cluster allocation */
     96 #else
     97 #define	NMBCLUSTERS	2048		/* map size, max cluster allocation */
     98 #endif
     99 #endif
    100 
    101 #ifndef NFS_RSIZE
    102 #define NFS_RSIZE       32768
    103 #endif
    104 #ifndef NFS_WSIZE
    105 #define NFS_WSIZE       32768
    106 #endif
    107 
    108 /*
    109  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
    110  * logical pages.
    111  */
    112 #define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
    113 #define	NKMEMPAGES_MAX_DEFAULT	((1 *1024 * 1024 * 1024) >> PAGE_SHIFT)
    114 
    115 /*
    116  * XXXfvdl the PD* stuff is different from i386.
    117  */
    118 /*
    119  * Mach derived conversion macros
    120  */
    121 #define	x86_round_pdr(x) \
    122 	((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
    123 #define	x86_trunc_pdr(x)	((unsigned long)(x) & ~(NBPD_L2 - 1))
    124 #define	x86_btod(x)		((unsigned long)(x) >> L2_SHIFT)
    125 #define	x86_dtob(x)		((unsigned long)(x) << L2_SHIFT)
    126 #define	x86_round_page(x)	((((unsigned long)(x)) + PGOFSET) & ~PGOFSET)
    127 #define	x86_trunc_page(x)	((unsigned long)(x) & ~PGOFSET)
    128 #define	x86_btop(x)		((unsigned long)(x) >> PGSHIFT)
    129 #define	x86_ptob(x)		((unsigned long)(x) << PGSHIFT)
    130 
    131 #define btop(x)				x86_btop(x)
    132 #define ptob(x)				x86_ptob(x)
    133 #define round_pdr(x)			x86_round_pdr(x)
    134 
    135 #define mstohz(ms) ((ms + 0UL) * hz / 1000)
    136 
    137 #else	/*	__x86_64__	*/
    138 
    139 #include <i386/param.h>
    140 
    141 #endif	/*	__x86_64__	*/
    142