pmap.h revision 1.1.22.2
1 /* $NetBSD: pmap.h,v 1.1.22.2 2020/04/08 14:07:50 martin 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_PMAP_H_ 33 #define _RISCV_PMAP_H_ 34 35 #ifdef _KERNEL_OPT 36 #include "opt_modular.h" 37 #endif 38 39 #if !defined(_MODULE) 40 41 #include <sys/types.h> 42 #include <sys/pool.h> 43 #include <sys/evcnt.h> 44 45 #include <uvm/uvm_physseg.h> 46 #include <uvm/pmap/vmpagemd.h> 47 48 #include <riscv/pte.h> 49 50 #define PMAP_SEGTABSIZE NPTEPG 51 52 #define NBSEG (NBPG*NPTEPG) 53 #ifdef _LP64 54 #define NBXSEG (NBSEG*NSEGPG) 55 #define XSEGSHIFT (SEGSHIFT + PGSHIFT - 3) 56 #define XSEGOFSET (PTE_PPN1|SEGOFSET) 57 #define SEGSHIFT (PGSHIFT + PGSHIFT - 3) 58 #else 59 #define SEGSHIFT (PGSHIFT + PGSHIFT - 2) 60 #endif 61 #define SEGOFSET (PTE_PPN0|PAGE_MASK) 62 63 #define KERNEL_PID 0 64 65 #define PMAP_HWPAGEWALKER 1 66 #define PMAP_TLB_NUM_PIDS 256 67 #define PMAP_TLB_MAX 1 68 #ifdef _LP64 69 #define PMAP_INVALID_PDETAB_ADDRESS ((pmap_pdetab_t *)(VM_MIN_KERNEL_ADDRESS - PAGE_SIZE)) 70 #define PMAP_INVALID_SEGTAB_ADDRESS ((pmap_segtab_t *)(VM_MIN_KERNEL_ADDRESS - PAGE_SIZE)) 71 #else 72 #define PMAP_INVALID_PDETAB_ADDRESS ((pmap_pdetab_t *)0xdeadbeef) 73 #define PMAP_INVALID_SEGTAB_ADDRESS ((pmap_segtab_t *)0xdeadbeef) 74 #endif 75 #define PMAP_TLB_FLUSH_ASID_ON_RESET false 76 77 #define pmap_phys_address(x) (x) 78 79 #ifndef __BSD_PTENTRY_T__ 80 #define __BSD_PTENTRY_T__ 81 #ifdef _LP64 82 #define PRIxPTE PRIx64 83 #else 84 #define PRIxPTE PRIx32 85 #endif 86 #endif /* __BSD_PTENTRY_T__ */ 87 88 #define PMAP_NEED_PROCWR 89 static inline void 90 pmap_procwr(struct proc *p, vaddr_t va, vsize_t len) 91 { 92 __asm __volatile("fence\trw,rw; fence.i"); 93 } 94 95 96 #include <uvm/pmap/tlb.h> 97 98 #include <uvm/pmap/pmap_tlb.h> 99 100 #define PMAP_GROWKERNEL 101 #define PMAP_STEAL_MEMORY 102 103 #ifdef _KERNEL 104 105 #define __HAVE_PMAP_MD 106 struct pmap_md { 107 paddr_t md_ptbr; 108 pd_entry_t *md_pdetab; 109 }; 110 111 void pmap_bootstrap(void); 112 113 struct vm_page * 114 pmap_md_alloc_poolpage(int flags); 115 vaddr_t pmap_md_map_poolpage(paddr_t, vsize_t); 116 void pmap_md_unmap_poolpage(vaddr_t, vsize_t); 117 bool pmap_md_direct_mapped_vaddr_p(vaddr_t); 118 bool pmap_md_io_vaddr_p(vaddr_t); 119 paddr_t pmap_md_direct_mapped_vaddr_to_paddr(vaddr_t); 120 vaddr_t pmap_md_direct_map_paddr(paddr_t); 121 void pmap_md_init(void); 122 bool pmap_md_tlb_check_entry(void *, vaddr_t, tlb_asid_t, pt_entry_t); 123 //void pmap_md_page_syncicache(struct vm_page *, const kcpuset_t *); 124 125 void pmap_md_pdetab_activate(struct pmap *); 126 void pmap_md_pdetab_init(struct pmap *); 127 bool pmap_md_ok_to_steal_p(const uvm_physseg_t, size_t); 128 129 #ifdef __PMAP_PRIVATE 130 static inline void 131 pmap_md_page_syncicache(struct vm_page *pg, const kcpuset_t *kc) 132 { 133 __asm __volatile("fence\trw,rw; fence.i"); 134 } 135 136 /* 137 * Virtual Cache Alias helper routines. Not a problem for RISCV CPUs. 138 */ 139 static inline bool 140 pmap_md_vca_add(struct vm_page *pg, vaddr_t va, pt_entry_t *nptep) 141 { 142 return false; 143 } 144 145 static inline void 146 pmap_md_vca_remove(struct vm_page *pg, vaddr_t va) 147 { 148 149 } 150 151 static inline void 152 pmap_md_vca_clean(struct vm_page *pg, vaddr_t va, int op) 153 { 154 } 155 156 static inline size_t 157 pmap_md_tlb_asid_max(void) 158 { 159 return PMAP_TLB_NUM_PIDS - 1; 160 } 161 #endif /* __PMAP_PRIVATE */ 162 #endif /* _KERNEL */ 163 164 #define POOL_VTOPHYS(va) ((paddr_t)((vaddr_t)(va)-VM_MAX_KERNEL_ADDRESS)) 165 #define POOL_PHYSTOV(pa) ((vaddr_t)(paddr_t)(pa)+VM_MAX_KERNEL_ADDRESS) 166 167 #include <uvm/pmap/pmap.h> 168 169 #endif /* !_MODULE */ 170 171 #if defined(MODULAR) || defined(_MODULE) 172 /* 173 * Define a compatible vm_page_md so that struct vm_page is the same size 174 * whether we are using modules or not. 175 */ 176 #ifndef __HAVE_VM_PAGE_MD 177 #define __HAVE_VM_PAGE_MD 178 179 struct vm_page_md { 180 uintptr_t mdpg_dummy[3]; 181 }; 182 __CTASSERT(sizeof(struct vm_page_md) == sizeof(uintptr_t)*3); 183 184 #endif /* !__HAVE_VM_PAGE_MD */ 185 186 #endif /* MODULAR || _MODULE */ 187 188 #endif /* !_RISCV_PMAP_H_ */ 189
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