1 /* $OpenBSD: pmap.h,v 1.19 2023/12/11 22:12:53 kettenis Exp $ */ 2 3 /* 4 * Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #ifndef _MACHINE_PMAP_H_ 20 #define _MACHINE_PMAP_H_ 21 22 #include <sys/mutex.h> 23 #include <sys/queue.h> 24 25 #ifdef _KERNEL 26 27 #include <machine/pte.h> 28 29 /* V->P mapping data */ 30 #define VP_IDX1_CNT 256 31 #define VP_IDX1_MASK (VP_IDX1_CNT - 1) 32 #define VP_IDX1_POS 20 33 #define VP_IDX2_CNT 256 34 #define VP_IDX2_MASK (VP_IDX2_CNT - 1) 35 #define VP_IDX2_POS 12 36 37 struct pmap { 38 LIST_HEAD(,slb_desc) pm_slbd; 39 int pm_refs; 40 struct pmap_statistics pm_stats; 41 struct mutex pm_mtx; 42 }; 43 44 typedef struct pmap *pmap_t; 45 46 #define PG_PMAP_MOD PG_PMAP0 47 #define PG_PMAP_REF PG_PMAP1 48 #define PG_PMAP_EXE PG_PMAP2 49 #define PG_PMAP_UC PG_PMAP3 50 51 #define PMAP_CACHE_DEFAULT 0 52 #define PMAP_CACHE_CI 1 /* cache inhibit */ 53 #define PMAP_CACHE_WB 3 /* write-back cached */ 54 55 /* 56 * MD flags that we use for pmap_enter (in the pa): 57 */ 58 #define PMAP_PA_MASK ~((paddr_t)PAGE_MASK) /* to remove the flags */ 59 #define PMAP_NOCACHE 0x1 /* map uncached */ 60 61 extern struct pmap kernel_pmap_store; 62 63 #define pmap_kernel() (&kernel_pmap_store) 64 #define pmap_resident_count(pm) ((pm)->pm_stats.resident_count) 65 #define pmap_wired_count(pm) ((pm)->pm_stats.wired_count) 66 67 #define pmap_init_percpu() do { /* nothing */ } while (0) 68 #define pmap_unuse_final(p) 69 #define pmap_remove_holes(vm) 70 #define pmap_update(pm) 71 72 void pmap_bootstrap(void); 73 void pmap_bootstrap_cpu(void); 74 75 int pmap_slbd_fault(pmap_t, vaddr_t); 76 int pmap_slbd_enter(pmap_t, vaddr_t); 77 int pmap_set_user_slb(pmap_t, vaddr_t, vaddr_t *, vsize_t *); 78 void pmap_clear_user_slb(void); 79 void pmap_unset_user_slb(void); 80 81 #ifdef DDB 82 struct pte; 83 struct pte *pmap_get_kernel_pte(vaddr_t); 84 #endif 85 86 #endif /* _KERNEL */ 87 88 struct vm_page_md { 89 struct mutex pv_mtx; 90 LIST_HEAD(,pte_desc) pv_list; 91 }; 92 93 #define VM_MDPAGE_INIT(pg) do { \ 94 mtx_init(&(pg)->mdpage.pv_mtx, IPL_VM); \ 95 LIST_INIT(&((pg)->mdpage.pv_list)); \ 96 } while (0) 97 98 #endif /* _MACHINE_PMAP_H_ */ 99