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param.h revision 1.1 
      1 /*	$NetBSD: param.h,v 1.1 2003/04/26 18:39:45 fvdl Exp $	*/
      2 
      3 #ifdef _KERNEL
      4 #ifdef _LOCORE
      5 #include <machine/psl.h>
      6 #else
      7 #include <machine/cpu.h>
      8 #endif
      9 #endif
     10 
     11 #define	_MACHINE	amd64
     12 #define	MACHINE		"amd64"
     13 #define	_MACHINE_ARCH	x86_64
     14 #define	MACHINE_ARCH	"x86_64"
     15 #define MID_MACHINE	MID_X86_64
     16 
     17 /*
     18  * Round p (pointer or byte index) up to a correctly-aligned value
     19  * for all data types (int, long, ...).   The result is u_int and
     20  * must be cast to any desired pointer type.
     21  *
     22  * ALIGNED_POINTER is a boolean macro that checks whether an address
     23  * is valid to fetch data elements of type t from on this architecture.
     24  * This does not reflect the optimal alignment, just the possibility
     25  * (within reasonable limits).
     26  *
     27  */
     28 #define ALIGNBYTES		(sizeof(long) - 1)
     29 #define ALIGN(p)		(((u_long)(p) + ALIGNBYTES) &~ALIGNBYTES)
     30 #define ALIGNED_POINTER(p,t)	1
     31 
     32 #define ALIGNBYTES32		(sizeof(int) - 1)
     33 #define ALIGN32(p)		(((u_long)(p) + ALIGNBYTES32) &~ALIGNBYTES32)
     34 
     35 #define	PGSHIFT		12		/* LOG2(NBPG) */
     36 #define	NBPG		(1 << PGSHIFT)	/* bytes/page */
     37 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
     38 #define	NPTEPG		(NBPG/(sizeof (pt_entry_t)))
     39 
     40 /*
     41  * XXXfvdl change this (after bootstrap) to take # of bits from
     42  * config info into account.
     43  */
     44 #define	KERNBASE	0xffffffff80000000 /* start of kernel virtual space */
     45 #define	KERNTEXTOFF	0xffffffff80100000 /* start of kernel text */
     46 #define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
     47 
     48 #define KERNTEXTOFF_HI	0xffffffff
     49 #define KERNTEXTOFF_LO	0x80100000
     50 
     51 #define KERNBASE_HI	0xffffffff
     52 #define KERNBASE_LO	0x80000000
     53 
     54 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     55 #define	DEV_BSIZE	(1 << DEV_BSHIFT)
     56 #define	BLKDEV_IOSIZE	2048
     57 #ifndef	MAXPHYS
     58 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
     59 #endif
     60 
     61 #define	SSIZE		1		/* initial stack size/NBPG */
     62 #define	SINCR		1		/* increment of stack/NBPG */
     63 #define	UPAGES		5		/* pages of u-area */
     64 #define	USPACE		(UPAGES * NBPG)	/* total size of u-area */
     65 
     66 #ifndef MSGBUFSIZE
     67 #define MSGBUFSIZE	4*NBPG		/* default message buffer size */
     68 #endif
     69 
     70 /*
     71  * Constants related to network buffer management.
     72  * MCLBYTES must be no larger than NBPG (the software page size), and,
     73  * on machines that exchange pages of input or output buffers with mbuf
     74  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     75  * of the hardware page size.
     76  */
     77 #define	MSIZE		512		/* size of an mbuf */
     78 
     79 #ifndef MCLSHIFT
     80 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
     81 					/* 2K cluster can hold Ether frame */
     82 #endif	/* MCLSHIFT */
     83 
     84 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
     85 
     86 #ifndef NMBCLUSTERS
     87 #if defined(_KERNEL_OPT)
     88 #include "opt_gateway.h"
     89 #endif
     90 
     91 #ifdef GATEWAY
     92 #define	NMBCLUSTERS	4096		/* map size, max cluster allocation */
     93 #else
     94 #define	NMBCLUSTERS	2048		/* map size, max cluster allocation */
     95 #endif
     96 #endif
     97 
     98 #ifndef NFS_RSIZE
     99 #define NFS_RSIZE       32768
    100 #endif
    101 #ifndef NFS_WSIZE
    102 #define NFS_WSIZE       32768
    103 #endif
    104 
    105 /*
    106  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
    107  * logical pages.
    108  */
    109 #define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
    110 #define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
    111 
    112 /* pages ("clicks") to disk blocks */
    113 #define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
    114 #define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))
    115 
    116 /* bytes to pages */
    117 #define	ctob(x)		((x) << PGSHIFT)
    118 #define	btoc(x)		(((x) + PGOFSET) >> PGSHIFT)
    119 
    120 /* bytes to disk blocks */
    121 #define	dbtob(x)	((x) << DEV_BSHIFT)
    122 #define	btodb(x)	((x) >> DEV_BSHIFT)
    123 
    124 /*
    125  * Map a ``block device block'' to a file system block.
    126  * This should be device dependent, and should use the bsize
    127  * field from the disk label.
    128  * For now though just use DEV_BSIZE.
    129  */
    130 #define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE / DEV_BSIZE))
    131 
    132 /*
    133  * XXXfvdl the PD* stuff is different from i386.
    134  */
    135 /*
    136  * Mach derived conversion macros
    137  */
    138 #define	x86_round_pdr(x) \
    139 	((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
    140 #define	x86_trunc_pdr(x)	((unsigned long)(x) & ~(NBPD_L2 - 1))
    141 #define	x86_btod(x)		((unsigned long)(x) >> L2_SHIFT)
    142 #define	x86_dtob(x)		((unsigned long)(x) << L2_SHIFT)
    143 #define	x86_round_page(x)	((((unsigned long)(x)) + PGOFSET) & ~PGOFSET)
    144 #define	x86_trunc_page(x)	((unsigned long)(x) & ~PGOFSET)
    145 #define	x86_btop(x)		((unsigned long)(x) >> PGSHIFT)
    146 #define	x86_ptob(x)		((unsigned long)(x) << PGSHIFT)
    147 
    148 #define btop(x)				x86_btop(x)
    149 #define ptob(x)				x86_ptob(x)
    150 #define round_pdr(x)			x86_round_pdr(x)
    151 
    152 #define mstohz(ms) ((ms + 0UL) * hz / 1000)
    153