/*- * Copyright (c) 1991 Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department and William Jolitz of UUNET Technologies Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Derived from hp300 version by Mike Hibler, this version by William * Jolitz uses a recursive map [a pde points to the page directory] to * map the page tables using the pagetables themselves. This is done to * reduce the impact on kernel virtual memory for lots of sparse address * space, and to reduce the cost of memory to each process. * * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91 * from: src/sys/i386/include/pmap.h,v 1.65.2.2 2000/11/30 01:54:42 peter * JNPR: pmap.h,v 1.7.2.1 2007/09/10 07:44:12 girish * $FreeBSD$ */ #ifndef _MACHINE_PMAP_H_ #define _MACHINE_PMAP_H_ #include #include #define VADDR(pdi, pti) ((vm_offset_t)(((pdi)<> SEGSHIFT) #define NUSERPGTBLS (VM_MAXUSER_ADDRESS >> SEGSHIFT) #ifndef LOCORE #include #include #include /* * Pmap stuff */ struct pv_entry; struct md_page { int pv_list_count; int pv_flags; TAILQ_HEAD(, pv_entry) pv_list; }; #define PV_TABLE_MOD 0x01 /* modified */ #define PV_TABLE_REF 0x02 /* referenced */ #define ASID_BITS 8 #define ASIDGEN_BITS (32 - ASID_BITS) #define ASIDGEN_MASK ((1 << ASIDGEN_BITS) - 1) struct pmap { pd_entry_t *pm_segtab; /* KVA of segment table */ TAILQ_HEAD(, pv_entry) pm_pvlist; /* list of mappings in * pmap */ cpumask_t pm_active; /* active on cpus */ struct { u_int32_t asid:ASID_BITS; /* TLB address space tag */ u_int32_t gen:ASIDGEN_BITS; /* its generation number */ } pm_asid[MAXSMPCPU]; struct pmap_statistics pm_stats; /* pmap statistics */ struct vm_page *pm_ptphint; /* pmap ptp hint */ struct mtx pm_mtx; }; typedef struct pmap *pmap_t; #ifdef _KERNEL pt_entry_t *pmap_pte(pmap_t, vm_offset_t); pd_entry_t pmap_segmap(pmap_t pmap, vm_offset_t va); vm_offset_t pmap_kextract(vm_offset_t va); #define vtophys(va) pmap_kextract(((vm_offset_t) (va))) extern struct pmap kernel_pmap_store; #define kernel_pmap (&kernel_pmap_store) #define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx) #define PMAP_LOCK_ASSERT(pmap, type) mtx_assert(&(pmap)->pm_mtx, (type)) #define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx) #define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \ NULL, MTX_DEF) #define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx) #define PMAP_MTX(pmap) (&(pmap)->pm_mtx) #define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx) #define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx) #define PMAP_LGMEM_LOCK_INIT(sysmap) mtx_init(&(sysmap)->lock, "pmap-lgmem", \ "per-cpu-map", (MTX_DEF| MTX_DUPOK)) #define PMAP_LGMEM_LOCK(sysmap) mtx_lock(&(sysmap)->lock) #define PMAP_LGMEM_UNLOCK(sysmap) mtx_unlock(&(sysmap)->lock) #define PMAP_LGMEM_DESTROY(sysmap) mtx_destroy(&(sysmap)->lock) /* * For each vm_page_t, there is a list of all currently valid virtual * mappings of that page. An entry is a pv_entry_t, the list is pv_table. */ typedef struct pv_entry { pmap_t pv_pmap; /* pmap where mapping lies */ vm_offset_t pv_va; /* virtual address for mapping */ TAILQ_ENTRY(pv_entry) pv_list; TAILQ_ENTRY(pv_entry) pv_plist; vm_page_t pv_ptem; /* VM page for pte */ boolean_t pv_wired; /* whether this entry is wired */ } *pv_entry_t; #if defined(DIAGNOSTIC) #define PMAP_DIAGNOSTIC #endif extern vm_offset_t phys_avail[]; extern char *ptvmmap; /* poor name! */ extern vm_offset_t virtual_avail; extern vm_offset_t virtual_end; extern pd_entry_t *segbase; extern vm_paddr_t mips_wired_tlb_physmem_start; extern vm_paddr_t mips_wired_tlb_physmem_end; extern u_int need_wired_tlb_page_pool; #define pmap_page_get_memattr(m) VM_MEMATTR_DEFAULT #define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list)) #define pmap_page_set_memattr(m, ma) (void)0 void pmap_bootstrap(void); void *pmap_mapdev(vm_offset_t, vm_size_t); void pmap_unmapdev(vm_offset_t, vm_size_t); vm_offset_t pmap_steal_memory(vm_size_t size); void pmap_set_modified(vm_offset_t pa); int page_is_managed(vm_offset_t pa); void pmap_page_is_free(vm_page_t m); void pmap_kenter(vm_offset_t va, vm_paddr_t pa); void pmap_kremove(vm_offset_t va); void *pmap_kenter_temporary(vm_paddr_t pa, int i); void pmap_kenter_temporary_free(vm_paddr_t pa); int pmap_compute_pages_to_dump(void); void pmap_update_page(pmap_t pmap, vm_offset_t va, pt_entry_t pte); /* * floating virtual pages (FPAGES) * * These are the reserved virtual memory areas which can be * mapped to any physical memory. */ #define FPAGES 2 #define FPAGES_SHARED 2 #define FSPACE ((FPAGES * MAXCPU + FPAGES_SHARED) * PAGE_SIZE) #define PMAP_FPAGE1 0x00 /* Used by pmap_zero_page & * pmap_copy_page */ #define PMAP_FPAGE2 0x01 /* Used by pmap_copy_page */ #define PMAP_FPAGE3 0x00 /* Used by pmap_zero_page_idle */ #define PMAP_FPAGE_KENTER_TEMP 0x01 /* Used by coredump */ struct fpage { vm_offset_t kva; u_int state; }; struct sysmaps { struct mtx lock; struct fpage fp[FPAGES]; }; vm_offset_t pmap_map_fpage(vm_paddr_t pa, struct fpage *fp, boolean_t check_unmaped); void pmap_unmap_fpage(vm_paddr_t pa, struct fpage *fp); #endif /* _KERNEL */ #endif /* !LOCORE */ #endif /* !_MACHINE_PMAP_H_ */