1 /* $NetBSD: param.h,v 1.42 2025/04/27 01:32:09 riastradh 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 #include "opt_svs.h" 16 #endif 17 #endif 18 19 #define _MACHINE amd64 20 #define MACHINE "amd64" 21 #define _MACHINE_ARCH x86_64 22 #define MACHINE_ARCH "x86_64" 23 #define MID_MACHINE MID_X86_64 24 25 #define ALIGNED_POINTER(p,t) 1 26 #define ALIGNED_POINTER_LOAD(q,p,t) memcpy((q), (p), sizeof(t)) 27 28 /* 29 * Align stack as required by AMD64 System V ABI. This is because 30 * (1) we want to bypass libc/csu in LLDB, and 31 * (2) rtld in glibc >= 2.23 for Linux/x86_64 requires it. 32 */ 33 #define STACK_ALIGNBYTES (16 - 1) 34 #define STACK_ALIGNBYTES32 (4 - 1) 35 36 #define ALIGNBYTES32 (sizeof(int) - 1) 37 #define ALIGN32(p) (((u_long)(p) + ALIGNBYTES32) &~ALIGNBYTES32) 38 39 #define PGSHIFT 12 /* LOG2(NBPG) */ 40 #define NBPG (1 << PGSHIFT) /* bytes/page */ 41 #define PGOFSET (NBPG-1) /* byte offset into page */ 42 #define NPTEPG (NBPG/(sizeof (pt_entry_t))) 43 44 #define MAXIOMEM 0xffffffffffff 45 46 /* 47 * Maximum physical memory supported by the implementation. 48 */ 49 #if defined(KMSAN) 50 #define MAXPHYSMEM 0x008000000000ULL /* 512GB */ 51 #else 52 #define MAXPHYSMEM 0x100000000000ULL /* 16TB */ 53 #endif 54 55 /* 56 * XXXfvdl change this (after bootstrap) to take # of bits from 57 * config info into account. 58 */ 59 #define KERNBASE 0xffffffff80000000 /* start of kernel virtual space */ 60 #define KERNTEXTOFF 0xffffffff80200000 /* start of kernel text */ 61 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 62 63 #define KERNTEXTOFF_HI 0xffffffff 64 #define KERNTEXTOFF_LO 0x80200000 65 66 #define KERNBASE_HI 0xffffffff 67 #define KERNBASE_LO 0x80000000 68 69 #define SSIZE 1 /* initial stack size/NBPG */ 70 #define SINCR 1 /* increment of stack/NBPG */ 71 72 #if defined(KASAN) || defined(KMSAN) 73 #define UPAGES_KxSAN 3 74 #else 75 #define UPAGES_KxSAN 0 76 #endif 77 #if defined(SVS) 78 #define UPAGES_SVS 1 79 #else 80 #define UPAGES_SVS 0 81 #endif 82 #define UPAGES_PCB 1 /* one page for the PCB */ 83 #define UPAGES_RED 1 /* one page for red zone between pcb/stack */ 84 #define UPAGES_STACK 3 /* three pages (12 KiB) of stack space */ 85 #define UPAGES \ 86 (UPAGES_PCB + UPAGES_RED + UPAGES_STACK + UPAGES_SVS + UPAGES_KxSAN) 87 88 #ifndef _STANDALONE 89 #if defined(KASAN) || defined(KMSAN) 90 __CTASSERT(UPAGES == 8); 91 #elif defined(SVS) 92 __CTASSERT(UPAGES == 6); 93 #else 94 __CTASSERT(UPAGES == 5); 95 #endif 96 #endif /* _STANDALONE */ 97 #define USPACE (UPAGES * NBPG) /* total size of u-area */ 98 99 #ifndef MSGBUFSIZE 100 #define MSGBUFSIZE (16*NBPG) /* default message buffer size */ 101 #endif 102 103 /* 104 * Constants related to network buffer management. 105 * MCLBYTES must be no larger than NBPG (the software page size), and, 106 * on machines that exchange pages of input or output buffers with mbuf 107 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 108 * of the hardware page size. 109 */ 110 #define MSIZE 512 /* size of an mbuf */ 111 112 #ifndef MCLSHIFT 113 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 114 /* 2K cluster can hold Ether frame */ 115 #endif /* MCLSHIFT */ 116 117 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 118 119 #ifndef NFS_RSIZE 120 #define NFS_RSIZE 32768 121 #endif 122 #ifndef NFS_WSIZE 123 #define NFS_WSIZE 32768 124 #endif 125 126 /* 127 * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized 128 * logical pages. 129 * No enforced maximum on amd64. 130 */ 131 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 132 #define NKMEMPAGES_MAX_UNLIMITED 1 133 134 /* 135 * XXXfvdl the PD* stuff is different from i386. 136 */ 137 /* 138 * Mach derived conversion macros 139 */ 140 #define x86_round_pdr(x) \ 141 ((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1)) 142 #define x86_trunc_pdr(x) ((unsigned long)(x) & ~(NBPD_L2 - 1)) 143 #define x86_btod(x) ((unsigned long)(x) >> L2_SHIFT) 144 #define x86_dtob(x) ((unsigned long)(x) << L2_SHIFT) 145 #define x86_round_page(x) ((((unsigned long)(x)) + PGOFSET) & ~PGOFSET) 146 #define x86_trunc_page(x) ((unsigned long)(x) & ~PGOFSET) 147 #define x86_btop(x) ((unsigned long)(x) >> PGSHIFT) 148 #define x86_ptob(x) ((unsigned long)(x) << PGSHIFT) 149 150 #define btop(x) x86_btop(x) 151 #define ptob(x) x86_ptob(x) 152 153 #else /* __x86_64__ */ 154 155 #include <i386/param.h> 156 157 #endif /* __x86_64__ */ 158