/* $NetBSD: pmap.h,v 1.79 2014/01/01 16:09:04 matt Exp $ */ /*- * Copyright (c) 1998, 1999, 2000, 2001, 2007 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center and by Chris G. Demetriou. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * Copyright (c) 1991, 1993 * The 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. * * 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. * 3. 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. * * @(#)pmap.h 8.1 (Berkeley) 6/10/93 */ /* * Copyright (c) 1987 Carnegie-Mellon University * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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. * * @(#)pmap.h 8.1 (Berkeley) 6/10/93 */ #ifndef _PMAP_MACHINE_ #define _PMAP_MACHINE_ #if defined(_KERNEL_OPT) #include "opt_multiprocessor.h" #endif #include #include #include /* * Machine-dependent virtual memory state. * * If we ever support processor numbers higher than 63, we'll have to * rethink the CPU mask. * * Note pm_asn and pm_asngen are arrays allocated in pmap_create(). * Their size is based on the PCS count from the HWRPB, and indexed * by processor ID (from `whami'). * * The kernel pmap is a special case; it gets statically-allocated * arrays which hold enough for ALPHA_MAXPROCS. */ struct pmap_asn_info { unsigned int pma_asn; /* address space number */ unsigned long pma_asngen; /* ASN generation number */ }; struct pmap { TAILQ_ENTRY(pmap) pm_list; /* list of all pmaps */ pt_entry_t *pm_lev1map; /* level 1 map */ int pm_count; /* pmap reference count */ kmutex_t pm_lock; /* lock on pmap */ struct pmap_statistics pm_stats; /* pmap statistics */ unsigned long pm_cpus; /* mask of CPUs using pmap */ unsigned long pm_needisync; /* mask of CPUs needing isync */ struct pmap_asn_info pm_asni[]; /* ASN information */ /* variable length */ }; /* * Compute the sizeof of a pmap structure. */ #define PMAP_SIZEOF(x) \ (ALIGN(offsetof(struct pmap, pm_asni[(x)]))) #define PMAP_ASN_RESERVED 0 /* reserved for Lev1map users */ /* * For each struct vm_page, 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 { struct pv_entry *pv_next; /* next pv_entry on list */ struct pmap *pv_pmap; /* pmap where mapping lies */ vaddr_t pv_va; /* virtual address for mapping */ pt_entry_t *pv_pte; /* PTE that maps the VA */ } *pv_entry_t; /* pvh_attrs */ #define PGA_MODIFIED 0x01 /* modified */ #define PGA_REFERENCED 0x02 /* referenced */ /* pvh_usage */ #define PGU_NORMAL 0 /* free or normal use */ #define PGU_PVENT 1 /* PV entries */ #define PGU_L1PT 2 /* level 1 page table */ #define PGU_L2PT 3 /* level 2 page table */ #define PGU_L3PT 4 /* level 3 page table */ #ifdef _KERNEL #include #ifdef _KERNEL_OPT #include "opt_dec_kn8ae.h" /* XXX */ #if defined(DEC_KN8AE) #define _PMAP_MAY_USE_PROM_CONSOLE #endif #else #define _PMAP_MAY_USE_PROM_CONSOLE #endif #ifndef _LKM #if defined(MULTIPROCESSOR) struct cpu_info; struct trapframe; void pmap_tlb_shootdown(pmap_t, vaddr_t, pt_entry_t, u_long *); void pmap_tlb_shootnow(u_long); void pmap_do_tlb_shootdown(struct cpu_info *, struct trapframe *); #define PMAP_TLB_SHOOTDOWN_CPUSET_DECL u_long shootset = 0; #define PMAP_TLB_SHOOTDOWN(pm, va, pte) \ pmap_tlb_shootdown((pm), (va), (pte), &shootset) #define PMAP_TLB_SHOOTNOW() \ pmap_tlb_shootnow(shootset) #else #define PMAP_TLB_SHOOTDOWN_CPUSET_DECL /* nothing */ #define PMAP_TLB_SHOOTDOWN(pm, va, pte) /* nothing */ #define PMAP_TLB_SHOOTNOW() /* nothing */ #endif /* MULTIPROCESSOR */ #endif /* _LKM */ #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) #define pmap_copy(dp, sp, da, l, sa) /* nothing */ #define pmap_update(pmap) /* nothing (yet) */ static __inline void pmap_remove_all(struct pmap *pmap) { /* Nothing. */ } #define pmap_is_referenced(pg) \ (((pg)->mdpage.pvh_attrs & PGA_REFERENCED) != 0) #define pmap_is_modified(pg) \ (((pg)->mdpage.pvh_attrs & PGA_MODIFIED) != 0) #define PMAP_STEAL_MEMORY /* enable pmap_steal_memory() */ #define PMAP_GROWKERNEL /* enable pmap_growkernel() */ /* * Alternate mapping hooks for pool pages. Avoids thrashing the TLB. */ #define PMAP_MAP_POOLPAGE(pa) ALPHA_PHYS_TO_K0SEG((pa)) #define PMAP_UNMAP_POOLPAGE(va) ALPHA_K0SEG_TO_PHYS((va)) /* * Other hooks for the pool allocator. */ #define POOL_VTOPHYS(va) ALPHA_K0SEG_TO_PHYS((vaddr_t) (va)) bool pmap_pageidlezero(paddr_t); #define PMAP_PAGEIDLEZERO(pa) pmap_pageidlezero((pa)) paddr_t vtophys(vaddr_t); /* Machine-specific functions. */ void pmap_bootstrap(paddr_t, u_int, u_long); int pmap_emulate_reference(struct lwp *, vaddr_t, int, int); #ifdef _PMAP_MAY_USE_PROM_CONSOLE int pmap_uses_prom_console(void); #endif #define pmap_pte_pa(pte) (PG_PFNUM(*(pte)) << PGSHIFT) #define pmap_pte_prot(pte) (*(pte) & PG_PROT) #define pmap_pte_w(pte) (*(pte) & PG_WIRED) #define pmap_pte_v(pte) (*(pte) & PG_V) #define pmap_pte_pv(pte) (*(pte) & PG_PVLIST) #define pmap_pte_asm(pte) (*(pte) & PG_ASM) #define pmap_pte_exec(pte) (*(pte) & PG_EXEC) #define pmap_pte_set_w(pte, v) \ do { \ if (v) \ *(pte) |= PG_WIRED; \ else \ *(pte) &= ~PG_WIRED; \ } while (0) #define pmap_pte_w_chg(pte, nw) ((nw) ^ pmap_pte_w(pte)) #define pmap_pte_set_prot(pte, np) \ do { \ *(pte) &= ~PG_PROT; \ *(pte) |= (np); \ } while (0) #define pmap_pte_prot_chg(pte, np) ((np) ^ pmap_pte_prot(pte)) static __inline pt_entry_t *pmap_l2pte(pmap_t, vaddr_t, pt_entry_t *); static __inline pt_entry_t *pmap_l3pte(pmap_t, vaddr_t, pt_entry_t *); #define pmap_l1pte(pmap, v) \ (&(pmap)->pm_lev1map[l1pte_index((vaddr_t)(v))]) static __inline pt_entry_t * pmap_l2pte(pmap_t pmap, vaddr_t v, pt_entry_t *l1pte) { pt_entry_t *lev2map; if (l1pte == NULL) { l1pte = pmap_l1pte(pmap, v); if (pmap_pte_v(l1pte) == 0) return (NULL); } lev2map = (pt_entry_t *)ALPHA_PHYS_TO_K0SEG(pmap_pte_pa(l1pte)); return (&lev2map[l2pte_index(v)]); } static __inline pt_entry_t * pmap_l3pte(pmap_t pmap, vaddr_t v, pt_entry_t *l2pte) { pt_entry_t *l1pte, *lev2map, *lev3map; if (l2pte == NULL) { l1pte = pmap_l1pte(pmap, v); if (pmap_pte_v(l1pte) == 0) return (NULL); lev2map = (pt_entry_t *)ALPHA_PHYS_TO_K0SEG(pmap_pte_pa(l1pte)); l2pte = &lev2map[l2pte_index(v)]; if (pmap_pte_v(l2pte) == 0) return (NULL); } lev3map = (pt_entry_t *)ALPHA_PHYS_TO_K0SEG(pmap_pte_pa(l2pte)); return (&lev3map[l3pte_index(v)]); } /* * Macros for locking pmap structures. * * Note that we if we access the kernel pmap in interrupt context, it * is only to update statistics. Since stats are updated using atomic * operations, locking the kernel pmap is not necessary. Therefore, * it is not necessary to block interrupts when locking pmap strucutres. */ #define PMAP_LOCK(pmap) mutex_enter(&(pmap)->pm_lock) #define PMAP_UNLOCK(pmap) mutex_exit(&(pmap)->pm_lock) /* * Macro for processing deferred I-stream synchronization. * * The pmap module may defer syncing the user I-stream until the * return to userspace, since the IMB PALcode op can be quite * expensive. Since user instructions won't be executed until * the return to userspace, this can be deferred until userret(). */ #define PMAP_USERRET(pmap) \ do { \ u_long cpu_mask = (1UL << cpu_number()); \ \ if ((pmap)->pm_needisync & cpu_mask) { \ atomic_and_ulong(&(pmap)->pm_needisync, ~cpu_mask); \ alpha_pal_imb(); \ } \ } while (0) /* * pmap-specific data store in the vm_page structure. */ #define __HAVE_VM_PAGE_MD struct vm_page_md { struct pv_entry *pvh_list; /* pv_entry list */ int pvh_attrs; /* page attributes */ unsigned pvh_refcnt; }; #define VM_MDPAGE_INIT(pg) \ do { \ (pg)->mdpage.pvh_list = NULL; \ (pg)->mdpage.pvh_refcnt = 0; \ } while (/*CONSTCOND*/0) #endif /* _KERNEL */ #endif /* _PMAP_MACHINE_ */