mirror of
https://codeberg.org/ziglang/zig.git
synced 2026-04-29 03:57:08 +03:00
Alex Rønne Petersen
66d97267c7
This excludes all headers in /usr/include/dev because that directory is bonkers huge (18M). We can add these on an as-needed basis.
98 lines
2.7 KiB
C
Vendored
98 lines
2.7 KiB
C
Vendored
/* $OpenBSD: pmap.h,v 1.19 2023/12/11 22:12:53 kettenis Exp $ */
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/*
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* Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _MACHINE_PMAP_H_
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#define _MACHINE_PMAP_H_
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#include <sys/mutex.h>
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#include <sys/queue.h>
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#ifdef _KERNEL
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#include <machine/pte.h>
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/* V->P mapping data */
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#define VP_IDX1_CNT 256
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#define VP_IDX1_MASK (VP_IDX1_CNT - 1)
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#define VP_IDX1_POS 20
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#define VP_IDX2_CNT 256
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#define VP_IDX2_MASK (VP_IDX2_CNT - 1)
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#define VP_IDX2_POS 12
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struct pmap {
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LIST_HEAD(,slb_desc) pm_slbd;
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int pm_refs;
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struct pmap_statistics pm_stats;
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struct mutex pm_mtx;
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};
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typedef struct pmap *pmap_t;
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#define PG_PMAP_MOD PG_PMAP0
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#define PG_PMAP_REF PG_PMAP1
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#define PG_PMAP_EXE PG_PMAP2
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#define PG_PMAP_UC PG_PMAP3
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#define PMAP_CACHE_DEFAULT 0
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#define PMAP_CACHE_CI 1 /* cache inhibit */
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#define PMAP_CACHE_WB 3 /* write-back cached */
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/*
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* MD flags that we use for pmap_enter (in the pa):
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*/
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#define PMAP_PA_MASK ~((paddr_t)PAGE_MASK) /* to remove the flags */
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#define PMAP_NOCACHE 0x1 /* map uncached */
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extern struct pmap kernel_pmap_store;
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#define pmap_kernel() (&kernel_pmap_store)
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#define pmap_resident_count(pm) ((pm)->pm_stats.resident_count)
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#define pmap_wired_count(pm) ((pm)->pm_stats.wired_count)
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#define pmap_init_percpu() do { /* nothing */ } while (0)
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#define pmap_unuse_final(p)
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#define pmap_remove_holes(vm)
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#define pmap_update(pm)
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void pmap_bootstrap(void);
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void pmap_bootstrap_cpu(void);
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int pmap_slbd_fault(pmap_t, vaddr_t);
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int pmap_slbd_enter(pmap_t, vaddr_t);
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int pmap_set_user_slb(pmap_t, vaddr_t, vaddr_t *, vsize_t *);
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void pmap_clear_user_slb(void);
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void pmap_unset_user_slb(void);
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#ifdef DDB
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struct pte;
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struct pte *pmap_get_kernel_pte(vaddr_t);
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#endif
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#endif /* _KERNEL */
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struct vm_page_md {
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struct mutex pv_mtx;
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LIST_HEAD(,pte_desc) pv_list;
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};
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#define VM_MDPAGE_INIT(pg) do { \
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mtx_init(&(pg)->mdpage.pv_mtx, IPL_VM); \
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LIST_INIT(&((pg)->mdpage.pv_list)); \
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} while (0)
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#endif /* _MACHINE_PMAP_H_ */ |