1/* $NetBSD: param.h,v 1.30 2019/03/16 11:50:48 rin Exp $ */
2
3#ifdef __x86_64__
4
5#ifndef XENPV
6/* Must be defined before cpu.h */
7#define MAXCPUS 256
8#endif
9
10#ifdef _KERNEL
11#include <machine/cpu.h>
12#if defined(_KERNEL_OPT)
13#include "opt_kasan.h"
14#include "opt_kleak.h"
15#endif
16#endif
17
18#define _MACHINE amd64
19#define MACHINE "amd64"
20#define _MACHINE_ARCH x86_64
21#define MACHINE_ARCH "x86_64"
22#define MID_MACHINE MID_X86_64
23
24#define ALIGNED_POINTER(p,t) 1
25
26/*
27 * Align stack as required by AMD64 System V ABI. This is because
28 * (1) we want to bypass libc/csu in LLDB, and
29 * (2) rtld in glibc >= 2.23 for Linux/x86_64 requires it.
30 */
31#define STACK_ALIGNBYTES (16 - 1)
32
33#define ALIGNBYTES32 (sizeof(int) - 1)
34#define ALIGN32(p) (((u_long)(p) + ALIGNBYTES32) &~ALIGNBYTES32)
35
36#define PGSHIFT 12 /* LOG2(NBPG) */
37#define NBPG (1 << PGSHIFT) /* bytes/page */
38#define PGOFSET (NBPG-1) /* byte offset into page */
39#define NPTEPG (NBPG/(sizeof (pt_entry_t)))
40
41#define MAXIOMEM 0xffffffffffff
42
43/*
44 * Maximum physical memory supported by the implementation.
45 */
46#define MAXPHYSMEM 0x100000000000ULL /* 16TB */
47
48/*
49 * XXXfvdl change this (after bootstrap) to take # of bits from
50 * config info into account.
51 */
52#define KERNBASE 0xffffffff80000000 /* start of kernel virtual space */
53#define KERNTEXTOFF 0xffffffff80200000 /* start of kernel text */
54#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
55
56#define KERNTEXTOFF_HI 0xffffffff
57#define KERNTEXTOFF_LO 0x80200000
58
59#define KERNBASE_HI 0xffffffff
60#define KERNBASE_LO 0x80000000
61
62#define SSIZE 1 /* initial stack size/NBPG */
63#define SINCR 1 /* increment of stack/NBPG */
64
65#if defined(KASAN) || defined(KLEAK)
66#define UPAGES 8
67#elif defined(DIAGNOSTIC)
68#define UPAGES 5 /* pages of u-area (1 for redzone) */
69#else
70#define UPAGES 4 /* pages of u-area */
71#endif
72#define USPACE (UPAGES * NBPG) /* total size of u-area */
73
74#ifndef MSGBUFSIZE
75#define MSGBUFSIZE (16*NBPG) /* default message buffer size */
76#endif
77
78/*
79 * Constants related to network buffer management.
80 * MCLBYTES must be no larger than NBPG (the software page size), and,
81 * on machines that exchange pages of input or output buffers with mbuf
82 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
83 * of the hardware page size.
84 */
85#define MSIZE 512 /* size of an mbuf */
86
87#ifndef MCLSHIFT
88#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
89 /* 2K cluster can hold Ether frame */
90#endif /* MCLSHIFT */
91
92#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
93
94#ifndef NFS_RSIZE
95#define NFS_RSIZE 32768
96#endif
97#ifndef NFS_WSIZE
98#define NFS_WSIZE 32768
99#endif
100
101/*
102 * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized
103 * logical pages.
104 * No enforced maximum on amd64.
105 */
106#define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
107#define NKMEMPAGES_MAX_UNLIMITED 1
108
109/*
110 * XXXfvdl the PD* stuff is different from i386.
111 */
112/*
113 * Mach derived conversion macros
114 */
115#define x86_round_pdr(x) \
116 ((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
117#define x86_trunc_pdr(x) ((unsigned long)(x) & ~(NBPD_L2 - 1))
118#define x86_btod(x) ((unsigned long)(x) >> L2_SHIFT)
119#define x86_dtob(x) ((unsigned long)(x) << L2_SHIFT)
120#define x86_round_page(x) ((((unsigned long)(x)) + PGOFSET) & ~PGOFSET)
121#define x86_trunc_page(x) ((unsigned long)(x) & ~PGOFSET)
122#define x86_btop(x) ((unsigned long)(x) >> PGSHIFT)
123#define x86_ptob(x) ((unsigned long)(x) << PGSHIFT)
124
125#define btop(x) x86_btop(x)
126#define ptob(x) x86_ptob(x)
127
128#define mstohz(ms) ((ms + 0UL) * hz / 1000)
129
130#else /* __x86_64__ */
131
132#include <i386/param.h>
133
134#endif /* __x86_64__ */
135