216 lines
6.0 KiB
C
216 lines
6.0 KiB
C
/* $NetBSD: pmap.h,v 1.30 2011/06/12 03:35:41 rmind Exp $ */
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/* $OpenBSD: pmap.h,v 1.35 2007/12/14 18:32:23 deraadt Exp $ */
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/*
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* Copyright (c) 2002-2004 Michael Shalayeff
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Pmap header for hppa.
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*/
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#ifndef _HPPA_PMAP_H_
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#define _HPPA_PMAP_H_
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#ifdef _KERNEL_OPT
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#include "opt_cputype.h"
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#endif
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#include <sys/mutex.h>
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#include <machine/pte.h>
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#include <machine/cpufunc.h>
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#include <uvm/uvm_pglist.h>
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#include <uvm/uvm_object.h>
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#ifdef _KERNEL
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struct pmap {
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struct uvm_object pm_obj; /* object (lck by object lock) */
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#define pm_lock pm_obj.vmobjlock
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kmutex_t pm_obj_lock; /* lock for pm_obj */
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struct vm_page *pm_ptphint;
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struct vm_page *pm_pdir_pg; /* vm_page for pdir */
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volatile uint32_t *pm_pdir; /* page dir (read-only after create) */
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pa_space_t pm_space; /* space id (read-only after create) */
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u_int pm_pid; /* prot id (read-only after create) */
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struct pmap_statistics pm_stats;
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};
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#define PVF_MOD PTE_PROT(TLB_DIRTY) /* pg/mp is modified */
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#define PVF_REF PTE_PROT(TLB_REFTRAP) /* pg/mp (inv) is referenced */
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#define PVF_WRITE PTE_PROT(TLB_WRITE) /* pg/mp is writable */
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#define PVF_UNCACHEABLE PTE_PROT(TLB_UNCACHEABLE) /* pg/mp is uncacheable */
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#define HPPA_MAX_PID 0xfffa
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#define HPPA_SID_MAX 0x7ffd
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/*
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* DON'T CHANGE THIS - this is assumed in lots of places.
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*/
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#define HPPA_SID_KERNEL 0
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#define HPPA_PID_KERNEL 2
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struct pv_entry { /* locked by its list's pvh_lock */
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struct pv_entry *pv_next;
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struct pmap *pv_pmap; /* the pmap */
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vaddr_t pv_va; /* the virtual address + flags */
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#define PV_VAMASK (~(PAGE_SIZE - 1))
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#define PV_KENTER 0x001
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struct vm_page *pv_ptp; /* the vm_page of the PTP */
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};
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extern int pmap_hptsize;
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extern struct pdc_hwtlb pdc_hwtlb;
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/*
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* pool quickmaps
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*/
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static inline vaddr_t hppa_map_poolpage(paddr_t pa)
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{
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return (vaddr_t)pa;
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}
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static inline paddr_t hppa_unmap_poolpage(vaddr_t va)
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{
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pdcache(HPPA_SID_KERNEL, va, PAGE_SIZE);
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#if defined(HP8000_CPU) || defined(HP8200_CPU) || \
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defined(HP8500_CPU) || defined(HP8600_CPU)
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ficache(HPPA_SID_KERNEL, va, PAGE_SIZE);
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pdtlb(HPPA_SID_KERNEL, va);
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pitlb(HPPA_SID_KERNEL, va);
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#endif
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return (paddr_t)va;
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}
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#define PMAP_MAP_POOLPAGE(pa) hppa_map_poolpage(pa)
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#define PMAP_UNMAP_POOLPAGE(va) hppa_unmap_poolpage(va)
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/*
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* according to the parisc manual aliased va's should be
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* different by high 12 bits only.
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*/
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#define PMAP_PREFER(o,h,s,td) do { \
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vaddr_t pmap_prefer_hint; \
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pmap_prefer_hint = (*(h) & HPPA_PGAMASK) | ((o) & HPPA_PGAOFF); \
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if (pmap_prefer_hint < *(h)) \
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pmap_prefer_hint += HPPA_PGALIAS; \
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*(h) = pmap_prefer_hint; \
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} while(0)
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#define pmap_sid2pid(s) (((s) + 1) << 1)
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#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
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#define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
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#define pmap_update(p)
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#define pmap_copy(dpmap,spmap,da,len,sa)
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#define pmap_clear_modify(pg) pmap_changebit(pg, 0, PTE_PROT(TLB_DIRTY))
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#define pmap_clear_reference(pg) \
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pmap_changebit(pg, PTE_PROT(TLB_REFTRAP), 0)
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#define pmap_is_modified(pg) pmap_testbit(pg, PTE_PROT(TLB_DIRTY))
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#define pmap_is_referenced(pg) pmap_testbit(pg, PTE_PROT(TLB_REFTRAP))
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#define pmap_phys_address(ppn) ((ppn) << PAGE_SHIFT)
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void pmap_activate(struct lwp *);
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void pmap_bootstrap(vaddr_t);
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bool pmap_changebit(struct vm_page *, u_int, u_int);
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bool pmap_testbit(struct vm_page *, u_int);
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void pmap_write_protect(struct pmap *, vaddr_t, vaddr_t, vm_prot_t);
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void pmap_remove(struct pmap *pmap, vaddr_t sva, vaddr_t eva);
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void pmap_page_remove(struct vm_page *pg);
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static inline void
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pmap_deactivate(struct lwp *l)
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{
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/* Nothing. */
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}
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static inline void
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pmap_remove_all(struct pmap *pmap)
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{
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/* Nothing. */
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}
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static inline int
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pmap_prot(struct pmap *pmap, int prot)
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{
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extern u_int hppa_prot[];
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return (hppa_prot[prot] | (pmap == pmap_kernel()? 0 : TLB_USER));
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}
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static inline void
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pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
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{
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if ((prot & UVM_PROT_WRITE) == 0) {
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if (prot & (UVM_PROT_RX))
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pmap_changebit(pg, 0, PTE_PROT(TLB_WRITE));
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else
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pmap_page_remove(pg);
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}
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}
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static inline void
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pmap_protect(struct pmap *pmap, vaddr_t sva, vaddr_t eva, vm_prot_t prot)
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{
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if ((prot & UVM_PROT_WRITE) == 0) {
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if (prot & (UVM_PROT_RX))
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pmap_write_protect(pmap, sva, eva, prot);
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else
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pmap_remove(pmap, sva, eva);
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}
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}
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#define pmap_sid(pmap, va) \
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((((va) & 0xc0000000) != 0xc0000000) ? \
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(pmap)->pm_space : HPPA_SID_KERNEL)
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#define __HAVE_VM_PAGE_MD
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struct pv_entry;
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struct vm_page_md {
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struct pv_entry *pvh_list; /* head of list (locked by pvh_lock) */
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u_int pvh_attrs; /* to preserve ref/mod */
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int pvh_aliases; /* alias counting */
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};
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#define VM_MDPAGE_INIT(pg) \
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do { \
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(pg)->mdpage.pvh_list = NULL; \
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(pg)->mdpage.pvh_attrs = 0; \
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(pg)->mdpage.pvh_aliases = 0; \
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} while (0)
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#endif /* _KERNEL */
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#endif /* _HPPA_PMAP_H_ */
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