1 /* $NetBSD: param.h,v 1.37 2020/03/17 17:18:49 maxv 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_kmsan.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 #define ALIGNED_POINTER_LOAD(q,p,t) memcpy((q), (p), sizeof(t)) 26 27 /* 28 * Align stack as required by AMD64 System V ABI. This is because 29 * (1) we want to bypass libc/csu in LLDB, and 30 * (2) rtld in glibc >= 2.23 for Linux/x86_64 requires it. 31 */ 32 #define STACK_ALIGNBYTES (16 - 1) 33 34 #define ALIGNBYTES32 (sizeof(int) - 1) 35 #define ALIGN32(p) (((u_long)(p) + ALIGNBYTES32) &~ALIGNBYTES32) 36 37 #define PGSHIFT 12 /* LOG2(NBPG) */ 38 #define NBPG (1 << PGSHIFT) /* bytes/page */ 39 #define PGOFSET (NBPG-1) /* byte offset into page */ 40 #define NPTEPG (NBPG/(sizeof (pt_entry_t))) 41 42 #define MAXIOMEM 0xffffffffffff 43 44 /* 45 * Maximum physical memory supported by the implementation. 46 */ 47 #if defined(KMSAN) 48 #define MAXPHYSMEM 0x008000000000ULL /* 512GB */ 49 #else 50 #define MAXPHYSMEM 0x100000000000ULL /* 16TB */ 51 #endif 52 53 /* 54 * XXXfvdl change this (after bootstrap) to take # of bits from 55 * config info into account. 56 */ 57 #define KERNBASE 0xffffffff80000000 /* start of kernel virtual space */ 58 #define KERNTEXTOFF 0xffffffff80200000 /* start of kernel text */ 59 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 60 61 #define KERNTEXTOFF_HI 0xffffffff 62 #define KERNTEXTOFF_LO 0x80200000 63 64 #define KERNBASE_HI 0xffffffff 65 #define KERNBASE_LO 0x80000000 66 67 #define SSIZE 1 /* initial stack size/NBPG */ 68 #define SINCR 1 /* increment of stack/NBPG */ 69 70 #if defined(KASAN) || defined(KMSAN) 71 #define UPAGES 8 72 #else 73 #define UPAGES 5 /* pages of u-area (1 for redzone) */ 74 #endif 75 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 76 77 #ifndef MSGBUFSIZE 78 #define MSGBUFSIZE (16*NBPG) /* default message buffer size */ 79 #endif 80 81 /* 82 * Constants related to network buffer management. 83 * MCLBYTES must be no larger than NBPG (the software page size), and, 84 * on machines that exchange pages of input or output buffers with mbuf 85 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 86 * of the hardware page size. 87 */ 88 #define MSIZE 512 /* size of an mbuf */ 89 90 #ifndef MCLSHIFT 91 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 92 /* 2K cluster can hold Ether frame */ 93 #endif /* MCLSHIFT */ 94 95 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 96 97 #ifndef NFS_RSIZE 98 #define NFS_RSIZE 32768 99 #endif 100 #ifndef NFS_WSIZE 101 #define NFS_WSIZE 32768 102 #endif 103 104 /* 105 * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized 106 * logical pages. 107 * No enforced maximum on amd64. 108 */ 109 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 110 #define NKMEMPAGES_MAX_UNLIMITED 1 111 112 /* 113 * XXXfvdl the PD* stuff is different from i386. 114 */ 115 /* 116 * Mach derived conversion macros 117 */ 118 #define x86_round_pdr(x) \ 119 ((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1)) 120 #define x86_trunc_pdr(x) ((unsigned long)(x) & ~(NBPD_L2 - 1)) 121 #define x86_btod(x) ((unsigned long)(x) >> L2_SHIFT) 122 #define x86_dtob(x) ((unsigned long)(x) << L2_SHIFT) 123 #define x86_round_page(x) ((((unsigned long)(x)) + PGOFSET) & ~PGOFSET) 124 #define x86_trunc_page(x) ((unsigned long)(x) & ~PGOFSET) 125 #define x86_btop(x) ((unsigned long)(x) >> PGSHIFT) 126 #define x86_ptob(x) ((unsigned long)(x) << PGSHIFT) 127 128 #define btop(x) x86_btop(x) 129 #define ptob(x) x86_ptob(x) 130 131 #else /* __x86_64__ */ 132 133 #include <i386/param.h> 134 135 #endif /* __x86_64__ */ 136