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param.h revision 1.24 
      1 /*	$NetBSD: param.h,v 1.24 2018/02/19 13:02:47 sborrill Exp $	*/
      2 
      3 #ifdef __x86_64__
      4 
      5 #ifndef XEN
      6 /* Must be defined before cpu.h */
      7 #define	MAXCPUS		256
      8 #endif
      9 
     10 #ifdef _KERNEL
     11 #include <machine/cpu.h>
     12 #endif
     13 
     14 #define	_MACHINE	amd64
     15 #define	MACHINE		"amd64"
     16 #define	_MACHINE_ARCH	x86_64
     17 #define	MACHINE_ARCH	"x86_64"
     18 #define MID_MACHINE	MID_X86_64
     19 
     20 #define ALIGNED_POINTER(p,t)	1
     21 
     22 #define ALIGNBYTES32		(sizeof(int) - 1)
     23 #define ALIGN32(p)		(((u_long)(p) + ALIGNBYTES32) &~ALIGNBYTES32)
     24 
     25 #define	PGSHIFT		12		/* LOG2(NBPG) */
     26 #define	NBPG		(1 << PGSHIFT)	/* bytes/page */
     27 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
     28 #define	NPTEPG		(NBPG/(sizeof (pt_entry_t)))
     29 
     30 #define	MAXIOMEM	0xffffffffffff
     31 
     32 /*
     33  * Maximum physical memory supported by the implementation.
     34  */
     35 #define MAXPHYSMEM	0x100000000000ULL /* 16TB */
     36 
     37 /*
     38  * XXXfvdl change this (after bootstrap) to take # of bits from
     39  * config info into account.
     40  */
     41 #define	KERNBASE	0xffffffff80000000 /* start of kernel virtual space */
     42 #define	KERNTEXTOFF	0xffffffff80200000 /* start of kernel text */
     43 #define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
     44 
     45 #define KERNTEXTOFF_HI	0xffffffff
     46 #define KERNTEXTOFF_LO	0x80200000
     47 
     48 #define KERNBASE_HI	0xffffffff
     49 #define KERNBASE_LO	0x80000000
     50 
     51 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     52 #define	DEV_BSIZE	(1 << DEV_BSHIFT)
     53 #define	BLKDEV_IOSIZE	2048
     54 #ifndef	MAXPHYS
     55 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
     56 #endif
     57 
     58 #define	SSIZE		1		/* initial stack size/NBPG */
     59 #define	SINCR		1		/* increment of stack/NBPG */
     60 #ifdef DIAGNOSTIC
     61 #define	UPAGES		4		/* pages of u-area (1 for redzone) */
     62 #else
     63 #define	UPAGES		3		/* pages of u-area */
     64 #endif
     65 #define	USPACE		(UPAGES * NBPG)	/* total size of u-area */
     66 
     67 #ifndef MSGBUFSIZE
     68 #define MSGBUFSIZE	(16*NBPG)	/* default message buffer size */
     69 #endif
     70 
     71 /*
     72  * Constants related to network buffer management.
     73  * MCLBYTES must be no larger than NBPG (the software page size), and,
     74  * on machines that exchange pages of input or output buffers with mbuf
     75  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     76  * of the hardware page size.
     77  */
     78 #define	MSIZE		512		/* size of an mbuf */
     79 
     80 #ifndef MCLSHIFT
     81 #define	MCLSHIFT	11		/* convert bytes to m_buf clusters */
     82 					/* 2K cluster can hold Ether frame */
     83 #endif	/* MCLSHIFT */
     84 
     85 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
     86 
     87 #ifndef NFS_RSIZE
     88 #define NFS_RSIZE       32768
     89 #endif
     90 #ifndef NFS_WSIZE
     91 #define NFS_WSIZE       32768
     92 #endif
     93 
     94 /*
     95  * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized
     96  * logical pages.
     97  * No enforced maximum on amd64.
     98  */
     99 #define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
    100 #define	NKMEMPAGES_MAX_UNLIMITED 1
    101 
    102 /*
    103  * XXXfvdl the PD* stuff is different from i386.
    104  */
    105 /*
    106  * Mach derived conversion macros
    107  */
    108 #define	x86_round_pdr(x) \
    109 	((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
    110 #define	x86_trunc_pdr(x)	((unsigned long)(x) & ~(NBPD_L2 - 1))
    111 #define	x86_btod(x)		((unsigned long)(x) >> L2_SHIFT)
    112 #define	x86_dtob(x)		((unsigned long)(x) << L2_SHIFT)
    113 #define	x86_round_page(x)	((((unsigned long)(x)) + PGOFSET) & ~PGOFSET)
    114 #define	x86_trunc_page(x)	((unsigned long)(x) & ~PGOFSET)
    115 #define	x86_btop(x)		((unsigned long)(x) >> PGSHIFT)
    116 #define	x86_ptob(x)		((unsigned long)(x) << PGSHIFT)
    117 
    118 #define btop(x)				x86_btop(x)
    119 #define ptob(x)				x86_ptob(x)
    120 
    121 #define mstohz(ms) ((ms + 0UL) * hz / 1000)
    122 
    123 #else	/*	__x86_64__	*/
    124 
    125 #include <i386/param.h>
    126 
    127 #endif	/*	__x86_64__	*/
    128