1 /* $OpenBSD: pmap.h,v 1.6 2021/05/16 03:29:35 jsg Exp $ */ 2 3 /* 4 * Copyright (c) 2019-2020 Brian Bamsch <bbamsch@google.com> 5 * Copyright (c) 2008,2009,2014 Dale Rahn <drahn@dalerahn.com> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 #ifndef _MACHINE_PMAP_H_ 20 #define _MACHINE_PMAP_H_ 21 22 #ifndef _LOCORE 23 #include <sys/mutex.h> 24 #include <sys/queue.h> 25 #include <machine/pte.h> 26 #endif 27 28 29 /* V->P mapping data */ 30 // XXX Only targeting compatibility with SV39 31 #define VP_IDX0_CNT 512 32 #define VP_IDX0_MASK (VP_IDX0_CNT-1) 33 #define VP_IDX0_POS 39 34 #define VP_IDX1_CNT 512 35 #define VP_IDX1_MASK (VP_IDX1_CNT-1) 36 #define VP_IDX1_POS 30 37 #define VP_IDX2_CNT 512 38 #define VP_IDX2_MASK (VP_IDX2_CNT-1) 39 #define VP_IDX2_POS 21 40 #define VP_IDX3_CNT 512 41 #define VP_IDX3_MASK (VP_IDX3_CNT-1) 42 #define VP_IDX3_POS 12 43 44 /* cache flags */ 45 // XXX These are duplicated from arm64 and may need some reworking 46 #define PMAP_CACHE_CI (PMAP_MD0) /* cache inhibit */ 47 #define PMAP_CACHE_WT (PMAP_MD1) /* writethru */ 48 #define PMAP_CACHE_WB (PMAP_MD1|PMAP_MD0) /* writeback */ 49 #define PMAP_CACHE_DEV (PMAP_MD2) /* device mapping */ 50 #define PMAP_CACHE_BITS (PMAP_MD0|PMAP_MD1|PMAP_MD2) 51 52 #define PTED_VA_MANAGED_M (PMAP_MD3) 53 #define PTED_VA_WIRED_M (PMAP_MD3 << 1) 54 #define PTED_VA_EXEC_M (PMAP_MD3 << 2) 55 56 #if defined(_KERNEL) && !defined(_LOCORE) 57 /* 58 * Pmap stuff 59 */ 60 61 typedef struct pmap *pmap_t; 62 63 struct pmap { 64 struct mutex pm_mtx; 65 union { 66 // XXX Sv48 not yet supported 67 // XXX Consider inverting Lx 68 struct pmapvp1 *l1; /* virtual to physical table 3 lvl */ 69 } pm_vp; 70 uint64_t pm_satp; 71 int pm_privileged; 72 int pm_refs; /* ref count */ 73 struct pmap_statistics pm_stats; /* pmap statistics */ 74 }; 75 76 #define PMAP_PA_MASK ~((paddr_t)PAGE_MASK) /* to remove the flags */ 77 #define PMAP_NOCACHE 0x1 /* non-cacheable memory */ 78 #define PMAP_DEVICE 0x2 /* device memory */ 79 80 #define PG_PMAP_MOD PG_PMAP0 81 #define PG_PMAP_REF PG_PMAP1 82 #define PG_PMAP_EXE PG_PMAP2 83 84 // [NCPUS] 85 extern paddr_t zero_page; 86 extern paddr_t copy_src_page; 87 extern paddr_t copy_dst_page; 88 89 void pagezero(vaddr_t); 90 91 extern struct pmap kernel_pmap_; 92 #define pmap_kernel() (&kernel_pmap_) 93 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 94 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 95 96 vaddr_t pmap_bootstrap(long kvo, paddr_t lpt1, 97 vaddr_t kernelstart, vaddr_t kernelend, 98 paddr_t memstart, paddr_t memend, 99 paddr_t ramstart, paddr_t ramend); 100 void pmap_kenter_cache(vaddr_t va, paddr_t pa, vm_prot_t prot, int cacheable); 101 void pmap_page_ro(pmap_t pm, vaddr_t va, vm_prot_t prot); 102 103 paddr_t pmap_steal_avail(size_t size, int align, void **kva); 104 void pmap_avail_fixup(void); 105 void pmap_physload_avail(void); 106 107 #define PMAP_GROWKERNEL 108 109 struct pv_entry; 110 111 /* investigate */ 112 #define pmap_unuse_final(p) do { /* nothing */ } while (0) 113 int pmap_fault_fixup(pmap_t, vaddr_t, vm_prot_t); 114 void pmap_postinit(void); 115 116 #endif /* _KERNEL && !_LOCORE */ 117 118 #ifndef _LOCORE 119 #define __HAVE_VM_PAGE_MD 120 struct vm_page_md { 121 struct mutex pv_mtx; 122 LIST_HEAD(,pte_desc) pv_list; 123 }; 124 125 #define VM_MDPAGE_INIT(pg) do { \ 126 mtx_init(&(pg)->mdpage.pv_mtx, IPL_VM); \ 127 LIST_INIT(&((pg)->mdpage.pv_list)); \ 128 } while (0) 129 #endif /* _LOCORE */ 130 131 #endif /* _MACHINE_PMAP_H_ */ 132