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/* $OpenBSD: pmap.h,v 1.6 2020/06/22 16:58:20 kettenis Exp $ */
/*
* Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _MACHINE_PMAP_H_
#define _MACHINE_PMAP_H_
/* V->P mapping data */
#define VP_IDX1_CNT 256
#define VP_IDX1_MASK (VP_IDX1_CNT - 1)
#define VP_IDX1_POS 20
#define VP_IDX2_CNT 256
#define VP_IDX2_MASK (VP_IDX2_CNT - 1)
#define VP_IDX2_POS 12
struct pmap {
LIST_HEAD(,slb_desc) pm_slbd;
int pm_refs;
struct pmap_statistics pm_stats;
struct mutex pm_mtx;
struct slb pm_slb[32];
};
typedef struct pmap *pmap_t;
#define PG_PMAP_MOD PG_PMAP0
#define PG_PMAP_REF PG_PMAP1
#define PG_PMAP_EXE PG_PMAP2
#define PG_PMAP_UC PG_PMAP3
#define PMAP_CACHE_DEFAULT 0
#define PMAP_CACHE_CI 1 /* cache inhibit */
#define PMAP_CACHE_WB 3 /* write-back cached */
/*
* MD flags that we use for pmap_enter (in the pa):
*/
#define PMAP_PA_MASK ~((paddr_t)PAGE_MASK) /* to remove the flags */
#define PMAP_NOCACHE 0x1 /* map uncached */
struct vm_page_md {
struct mutex pv_mtx;
LIST_HEAD(,pte_desc) pv_list;
};
#define VM_MDPAGE_INIT(pg) do { \
mtx_init(&(pg)->mdpage.pv_mtx, IPL_VM); \
LIST_INIT(&((pg)->mdpage.pv_list)); \
} while (0)
extern struct pmap kernel_pmap_store;
#define pmap_kernel() (&kernel_pmap_store)
#define pmap_resident_count(pm) ((pm)->pm_stats.resident_count)
#define pmap_unuse_final(p)
#define pmap_remove_holes(vm)
#define pmap_update(pm)
void pmap_bootstrap(void);
int pmap_set_user_slb(pmap_t, vaddr_t);
void pmap_unset_user_slb(void);
#ifdef DDB
struct pte;
struct pte *pmap_get_kernel_pte(vaddr_t);
#endif
#endif /* _MACHINE_PMAP_H_ */
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