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/* $NetBSD: pmap.h,v 1.41 2022/05/26 05:34:04 skrll Exp $ */
/* $OpenBSD: pmap.h,v 1.35 2007/12/14 18:32:23 deraadt Exp $ */
/*
* Copyright (c) 2002-2004 Michael Shalayeff
* All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR OR HIS RELATIVES 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 MIND, 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 header for hppa.
*/
#ifndef _HPPA_PMAP_H_
#define _HPPA_PMAP_H_
#ifdef _KERNEL_OPT
#include "opt_cputype.h"
#endif
#include <sys/rwlock.h>
#include <machine/pte.h>
#include <machine/cpufunc.h>
#include <uvm/uvm_pglist.h>
#include <uvm/uvm_object.h>
#ifdef _KERNEL
#define PMAP_NEED_PROCWR
struct pmap {
struct uvm_object pm_obj; /* object (lck by object lock) */
#define pm_lock pm_obj.vmobjlock
krwlock_t pm_obj_lock; /* lock for pm_obj */
struct vm_page *pm_ptphint;
struct vm_page *pm_pdir_pg; /* vm_page for pdir */
volatile uint32_t *pm_pdir; /* page dir (read-only after create) */
pa_space_t pm_space; /* space id (read-only after create) */
u_int pm_pid; /* prot id (read-only after create) */
struct pmap_statistics pm_stats;
};
#define PVF_MOD PTE_PROT(TLB_DIRTY) /* pg/mp is modified */
#define PVF_REF PTE_PROT(TLB_REFTRAP) /* pg/mp (inv) is referenced */
#define PVF_WRITE PTE_PROT(TLB_WRITE) /* pg/mp is writable */
#define PVF_EXEC PTE_PROT(TLB_EXECUTE) /* pg/mp is executable */
#define PVF_UNCACHEABLE PTE_PROT(TLB_UNCACHEABLE) /* pg/mp is uncacheable */
#define HPPA_MAX_PID 0xfffa
#define HPPA_SID_MAX 0x7ffd
#define PMAP_DIRECTMAP 0x10000000 /* kenter_pa */
/*
* DON'T CHANGE THIS - this is assumed in lots of places.
*/
#define HPPA_SID_KERNEL 0
#define HPPA_PID_KERNEL 2
struct pv_entry { /* locked by its list's pvh_lock */
struct pv_entry *pv_next;
struct pmap *pv_pmap; /* the pmap */
vaddr_t pv_va; /* the virtual address + flags */
#define PV_VAMASK (~(PAGE_SIZE - 1))
#define PV_KENTER __BIT(0)
struct vm_page *pv_ptp; /* the vm_page of the PTP */
};
extern int pmap_hptsize;
extern struct pdc_hwtlb pdc_hwtlb;
/*
* pool quickmaps
*/
static inline vaddr_t hppa_map_poolpage(paddr_t pa)
{
return (vaddr_t)pa;
}
static inline paddr_t hppa_unmap_poolpage(vaddr_t va)
{
pdcache(HPPA_SID_KERNEL, va, PAGE_SIZE);
#if defined(HP8000_CPU) || defined(HP8200_CPU) || \
defined(HP8500_CPU) || defined(HP8600_CPU)
pdtlb(HPPA_SID_KERNEL, va);
#endif
return (paddr_t)va;
}
#define PMAP_MAP_POOLPAGE(pa) hppa_map_poolpage(pa)
#define PMAP_UNMAP_POOLPAGE(va) hppa_unmap_poolpage(va)
/*
* according to the parisc manual aliased va's should be
* different by high 12 bits only.
*/
#define PMAP_PREFER(o,h,s,td) pmap_prefer((o), (h), (td))
static inline void
pmap_prefer(vaddr_t fo, vaddr_t *va, int td)
{
vaddr_t newva;
newva = (*va & HPPA_PGAMASK) | (fo & HPPA_PGAOFF);
if (td) {
if (newva > *va)
newva -= HPPA_PGALIAS;
} else {
if (newva < *va)
newva += HPPA_PGALIAS;
}
*va = newva;
}
#define pmap_sid2pid(s) (((s) + 1) << 1)
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
#define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
#define pmap_update(p)
#define pmap_copy(dpmap,spmap,da,len,sa)
#define pmap_clear_modify(pg) pmap_changebit(pg, 0, PTE_PROT(TLB_DIRTY))
#define pmap_clear_reference(pg) \
pmap_changebit(pg, PTE_PROT(TLB_REFTRAP), 0)
#define pmap_is_modified(pg) pmap_testbit(pg, PTE_PROT(TLB_DIRTY))
#define pmap_is_referenced(pg) pmap_testbit(pg, PTE_PROT(TLB_REFTRAP))
#define pmap_phys_address(ppn) ((ppn) << PAGE_SHIFT)
void pmap_activate(struct lwp *);
void pmap_bootstrap(vaddr_t);
bool pmap_changebit(struct vm_page *, u_int, u_int);
bool pmap_testbit(struct vm_page *, u_int);
void pmap_write_protect(struct pmap *, vaddr_t, vaddr_t, vm_prot_t);
void pmap_remove(struct pmap *pmap, vaddr_t sva, vaddr_t eva);
void pmap_page_remove(struct vm_page *pg);
void pmap_procwr(struct proc *, vaddr_t, size_t);
static inline void
pmap_deactivate(struct lwp *l)
{
/* Nothing. */
}
static inline bool
pmap_remove_all(struct pmap *pmap)
{
/* Nothing. */
return false;
}
static inline int
pmap_prot(struct pmap *pmap, int prot)
{
extern u_int hppa_prot[];
return (hppa_prot[prot] | (pmap == pmap_kernel() ? 0 : TLB_USER));
}
static inline void
pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
{
if ((prot & UVM_PROT_WRITE) == 0) {
if (prot & (UVM_PROT_RX))
pmap_changebit(pg, 0, PTE_PROT(TLB_WRITE));
else
pmap_page_remove(pg);
}
}
static inline void
pmap_protect(struct pmap *pmap, vaddr_t sva, vaddr_t eva, vm_prot_t prot)
{
if ((prot & UVM_PROT_WRITE) == 0) {
if (prot & (UVM_PROT_RX))
pmap_write_protect(pmap, sva, eva, prot);
else
pmap_remove(pmap, sva, eva);
}
}
#define pmap_sid(pmap, va) \
((((va) & 0xc0000000) != 0xc0000000) ? \
(pmap)->pm_space : HPPA_SID_KERNEL)
#define __HAVE_VM_PAGE_MD
struct pv_entry;
struct vm_page_md {
struct pv_entry *pvh_list; /* head of list */
u_int pvh_attrs; /* to preserve ref/mod */
};
#define VM_MDPAGE_INIT(pg) \
do { \
(pg)->mdpage.pvh_list = NULL; \
(pg)->mdpage.pvh_attrs = 0; \
} while (0)
#endif /* _KERNEL */
#endif /* _HPPA_PMAP_H_ */
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