1/* $NetBSD: param.h,v 1.19 2015/10/27 22:28:56 mrg 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/*
31 * XXXfvdl change this (after bootstrap) to take # of bits from
32 * config info into account.
33 */
34#define KERNBASE 0xffffffff80000000 /* start of kernel virtual space */
35#define KERNTEXTOFF 0xffffffff80100000 /* start of kernel text */
36#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
37
38#define KERNTEXTOFF_HI 0xffffffff
39#define KERNTEXTOFF_LO 0x80100000
40
41#define KERNBASE_HI 0xffffffff
42#define KERNBASE_LO 0x80000000
43
44#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
45#define DEV_BSIZE (1 << DEV_BSHIFT)
46#define BLKDEV_IOSIZE 2048
47#ifndef MAXPHYS
48#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
49#endif
50
51#define SSIZE 1 /* initial stack size/NBPG */
52#define SINCR 1 /* increment of stack/NBPG */
53#ifdef DIAGNOSTIC
54#define UPAGES 4 /* pages of u-area (1 for redzone) */
55#else
56#define UPAGES 3 /* pages of u-area */
57#endif
58#define USPACE (UPAGES * NBPG) /* total size of u-area */
59#define INTRSTACKSIZE 4096
60
61#ifndef MSGBUFSIZE
62#define MSGBUFSIZE (8*NBPG) /* default message buffer size */
63#endif
64
65/*
66 * Constants related to network buffer management.
67 * MCLBYTES must be no larger than NBPG (the software page size), and,
68 * on machines that exchange pages of input or output buffers with mbuf
69 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
70 * of the hardware page size.
71 */
72#define MSIZE 512 /* size of an mbuf */
73
74#ifndef MCLSHIFT
75#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
76 /* 2K cluster can hold Ether frame */
77#endif /* MCLSHIFT */
78
79#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
80
81#ifndef NFS_RSIZE
82#define NFS_RSIZE 32768
83#endif
84#ifndef NFS_WSIZE
85#define NFS_WSIZE 32768
86#endif
87
88/*
89 * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized
90 * logical pages.
91 * No enforced maximum on amd64.
92 */
93#define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
94#define NKMEMPAGES_MAX_UNLIMITED 1
95
96/*
97 * XXXfvdl the PD* stuff is different from i386.
98 */
99/*
100 * Mach derived conversion macros
101 */
102#define x86_round_pdr(x) \
103 ((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
104#define x86_trunc_pdr(x) ((unsigned long)(x) & ~(NBPD_L2 - 1))
105#define x86_btod(x) ((unsigned long)(x) >> L2_SHIFT)
106#define x86_dtob(x) ((unsigned long)(x) << L2_SHIFT)
107#define x86_round_page(x) ((((unsigned long)(x)) + PGOFSET) & ~PGOFSET)
108#define x86_trunc_page(x) ((unsigned long)(x) & ~PGOFSET)
109#define x86_btop(x) ((unsigned long)(x) >> PGSHIFT)
110#define x86_ptob(x) ((unsigned long)(x) << PGSHIFT)
111
112#define btop(x) x86_btop(x)
113#define ptob(x) x86_ptob(x)
114
115#define mstohz(ms) ((ms + 0UL) * hz / 1000)
116
117#else /* __x86_64__ */
118
119#include <i386/param.h>
120
121#endif /* __x86_64__ */
122