vmparam.h revision 1.7
1 /* $NetBSD: vmparam.h,v 1.7 2020/11/07 14:48:45 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _RISCV_VMPARAM_H_ 33 #define _RISCV_VMPARAM_H_ 34 35 #include <riscv/param.h> 36 37 #ifdef _KERNEL_OPT 38 #include "opt_multiprocessor.h" 39 #endif 40 41 /* 42 * Machine dependent VM constants for RISCV. 43 */ 44 45 #define PAGE_SHIFT PGSHIFT 46 #define PAGE_SIZE (1 << PAGE_SHIFT) 47 #define PAGE_MASK (PAGE_SIZE - 1) 48 49 /* 50 * USRSTACK is the top (end) of the user stack. 51 * 52 * USRSTACK needs to start a page below the maxuser address so that a memory 53 * access with a maximum displacement (0x7ff) won't cross into the kernel's 54 * address space. We use PAGE_SIZE instead of 0x800 since these need to be 55 * page-aligned. 56 */ 57 #define USRSTACK (VM_MAXUSER_ADDRESS-PAGE_SIZE) /* Start of user stack */ 58 #define USRSTACK32 ((uint32_t)VM_MAXUSER_ADDRESS32-PAGE_SIZE) 59 60 /* 61 * Virtual memory related constants, all in bytes 62 */ 63 #ifndef MAXTSIZ 64 #define MAXTSIZ (128*1024*1024) /* max text size */ 65 #endif 66 #ifndef DFLDSIZ 67 #define DFLDSIZ (256*1024*1024) /* initial data size limit */ 68 #endif 69 #ifndef MAXDSIZ 70 #define MAXDSIZ (1536*1024*1024) /* max data size */ 71 #endif 72 #ifndef DFLSSIZ 73 #define DFLSSIZ (16*1024*1024) /* initial stack size limit */ 74 #endif 75 #ifndef MAXSSIZ 76 #define MAXSSIZ (120*1024*1024) /* max stack size */ 77 #endif 78 79 /* 80 * Virtual memory related constants, all in bytes 81 */ 82 #ifndef DFLDSIZ32 83 #define DFLDSIZ32 DFLDSIZ /* initial data size limit */ 84 #endif 85 #ifndef MAXDSIZ32 86 #define MAXDSIZ32 MAXDSIZ /* max data size */ 87 #endif 88 #ifndef DFLSSIZ32 89 #define DFLSSIZ32 DFLTSIZ /* initial stack size limit */ 90 #endif 91 #ifndef MAXSSIZ32 92 #define MAXSSIZ32 MAXSSIZ /* max stack size */ 93 #endif 94 95 /* 96 * PTEs for mapping user space into the kernel for phyio operations. 97 * The default PTE number is enough to cover 8 disks * MAXBSIZE. 98 */ 99 #ifndef USRIOSIZE 100 #define USRIOSIZE (MAXBSIZE/PAGE_SIZE * 8) 101 #endif 102 103 /* 104 * User/kernel map constants. 105 */ 106 #define VM_MIN_ADDRESS ((vaddr_t)0x00000000) 107 #ifdef _LP64 /* Sv39 */ 108 #define VM_MAXUSER_ADDRESS ((vaddr_t)0x0000004000000000 - 16 * PAGE_SIZE) 109 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xffffffc000000000) 110 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xffffffd000000000) /* MIN + 64GB */ 111 #else /* Sv32 */ 112 #define VM_MAXUSER_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xffffffff80000000 */ 113 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xffffffff80000000 */ 114 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-0x40000000) /* 0xffffffffc0000000 */ 115 #endif 116 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 117 #define VM_MAXUSER_ADDRESS32 ((vaddr_t)(1UL << 31))/* 0x0000000080000000 */ 118 119 /* 120 * The address to which unspecified mapping requests default 121 */ 122 #define __USE_TOPDOWN_VM 123 124 #define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \ 125 trunc_page(USRSTACK - MAXSSIZ - (sz) - user_stack_guard_size) 126 #define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \ 127 round_page((vaddr_t)(da) + (vsize_t)maxdmap) 128 129 #define VM_DEFAULT_ADDRESS32_TOPDOWN(da, sz) \ 130 trunc_page(USRSTACK32 - MAXSSIZ32 - (sz) - user_stack_guard_size) 131 #define VM_DEFAULT_ADDRESS32_BOTTOMUP(da, sz) \ 132 round_page((vaddr_t)(da) + (vsize_t)MAXDSIZ32) 133 134 /* virtual sizes (bytes) for various kernel submaps */ 135 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 136 137 /* VM_PHYSSEG_MAX defined by platform-dependent code. */ 138 #ifndef VM_PHYSSEG_MAX 139 #define VM_PHYSSEG_MAX 1 140 #endif 141 #if VM_PHYSSEG_MAX == 1 142 #define VM_PHYSSEG_STRAT VM_PSTRAT_LINEAR 143 #else 144 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 145 #endif 146 #define VM_PHYSSEG_NOADD /* can add RAM after vm_mem_init */ 147 148 #ifndef VM_NFREELIST 149 #define VM_NFREELIST 2 /* 2 distinct memory segments */ 150 #define VM_FREELIST_DEFAULT 0 151 #define VM_FREELIST_DIRECTMAP 1 152 #endif 153 154 #ifdef _KERNEL 155 #define UVM_KM_VMFREELIST riscv_poolpage_vmfreelist 156 extern int riscv_poolpage_vmfreelist; 157 158 #ifdef _LP64 159 void * cpu_uarea_alloc(bool); 160 bool cpu_uarea_free(void *); 161 #endif 162 #endif 163 164 #endif /* ! _RISCV_VMPARAM_H_ */ 165
Indexes created Tue Sep 23 14:10:03 GMT 2025