Brought up-to-date with revision 1.124 of the Sun3 pmap.
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fredette
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@ -1,4 +1,4 @@
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/* $NetBSD: pmap.c,v 1.1 2001/03/28 13:47:58 fredette Exp $ */
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/* $NetBSD: pmap.c,v 1.2 2001/03/28 14:15:11 fredette Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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@ -55,7 +55,7 @@
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* be stolen from it. PMEGs allocated to a particular segment of a
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* pmap's virtual space will be fought over by the other pmaps.
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*
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* This pmap was once sys/arch/sun3/sun3/pmap.c revision 1.116.
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* This pmap was once sys/arch/sun3/sun3/pmap.c revision 1.124.
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*/
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/*
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@ -94,23 +94,17 @@
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/pool.h>
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#include <sys/user.h>
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#include <sys/queue.h>
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#include <sys/kcore.h>
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_prot.h>
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#include <vm/vm_page.h>
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#include <uvm/uvm.h>
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/* XXX - Pager hacks... (explain?) */
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#define PAGER_SVA (uvm.pager_sva)
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#define PAGER_EVA (uvm.pager_eva)
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#include <m68k/m68k.h>
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#include <machine/cpu.h>
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#include <machine/dvma.h>
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#include <machine/idprom.h>
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@ -231,6 +225,9 @@ static int pmap_version = 1;
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struct pmap kernel_pmap_store;
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#define kernel_pmap (&kernel_pmap_store)
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static u_char kernel_segmap[NSEGMAP];
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/* memory pool for pmap structures */
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struct pool pmap_pmap_pool;
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/* statistics... */
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struct pmap_stats {
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@ -262,14 +259,12 @@ struct pmap_stats {
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#define pmap_refcount(pmap) pmap->pm_refcount
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/*
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* Note that splpmap() is used in routines called at splnet() and
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* Note that splvm() is used in routines called at splnet() and
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* MUST NOT lower the priority. For this reason we arrange that:
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* splimp = max(splnet,splbio)
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* Would splvm() be more natural here? (same level as splimp).
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*/
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#define splpmap splimp
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#ifdef PMAP_DEBUG
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#define CHECK_SPL() do { \
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if ((getsr() & PSL_IPL) < PSL_IPL4) \
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@ -1813,7 +1808,7 @@ pmap_bootstrap(nextva)
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/* Initialization for pmap_next_page() */
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avail_next = avail_start;
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PAGE_SIZE = NBPG;
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uvmexp.pagesize = NBPG;
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uvm_setpagesize();
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/* after setting up some structures */
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@ -1934,6 +1929,10 @@ pmap_init()
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{
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pv_init();
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/* Initialize the pmap pool. */
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pool_init(&pmap_pmap_pool, sizeof(struct pmap), 0, 0, 0, "pmappl",
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0, pool_page_alloc_nointr, pool_page_free_nointr, M_VMPMAP);
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}
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/*
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@ -1989,7 +1988,7 @@ pmap_create()
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{
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pmap_t pmap;
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pmap = (pmap_t) malloc(sizeof(struct pmap), M_VMPMAP, M_WAITOK);
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pmap = pool_get(&pmap_pmap_pool, PR_WAITOK);
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pmap_pinit(pmap);
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return pmap;
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}
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@ -2005,7 +2004,7 @@ pmap_release(pmap)
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{
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int s;
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s = splpmap();
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s = splvm();
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if (pmap == kernel_pmap)
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panic("pmap_release: kernel_pmap!");
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@ -2050,7 +2049,7 @@ pmap_destroy(pmap)
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pmap_unlock(pmap);
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if (count == 0) {
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pmap_release(pmap);
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free((caddr_t)pmap, M_VMPMAP);
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pool_put(&pmap_pmap_pool, pmap);
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}
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}
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@ -2096,8 +2095,6 @@ pmap_enter(pmap, va, pa, prot, flags)
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int new_pte, s;
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boolean_t wired = (flags & PMAP_WIRED) != 0;
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if (pmap == NULL)
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return (KERN_SUCCESS);
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#ifdef PMAP_DEBUG
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if ((pmap_debug & PMD_ENTER) ||
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(va == pmap_db_watchva))
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@ -2123,7 +2120,7 @@ pmap_enter(pmap, va, pa, prot, flags)
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* be in the mmu either.
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*
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*/
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s = splpmap();
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s = splvm();
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if (pmap == kernel_pmap) {
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new_pte |= PG_SYSTEM;
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pmap_enter_kernel(va, new_pte, wired);
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@ -2131,7 +2128,7 @@ pmap_enter(pmap, va, pa, prot, flags)
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pmap_enter_user(pmap, va, new_pte, wired);
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}
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splx(s);
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return (KERN_SUCCESS);
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return (0);
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}
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static void
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@ -2527,12 +2524,12 @@ _pmap_fault(map, va, ftype)
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* Most pages below virtual_avail are read-only,
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* so I will assume it is a protection failure.
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*/
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return KERN_PROTECTION_FAILURE;
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return EACCES;
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}
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} else {
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/* User map. Try reload shortcut. */
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if (pmap_fault_reload(pmap, va, ftype))
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return KERN_SUCCESS;
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return 0;
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}
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rv = uvm_fault(map, va, 0, ftype);
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@ -2584,7 +2581,7 @@ pmap_fault_reload(pmap, pgva, ftype)
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chkpte |= PG_WRITE;
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rv = 0;
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s = splpmap();
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s = splvm();
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/*
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* Given that we faulted on a user-space address, we will
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@ -2654,7 +2651,7 @@ pmap_clear_modify(pg)
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pv_flags = pa_to_pvflags(pa);
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head = pa_to_pvhead(pa);
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s = splpmap();
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s = splvm();
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*pv_flags |= pv_syncflags(*head);
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rv = *pv_flags & PV_MOD;
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*pv_flags &= ~PV_MOD;
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@ -2684,7 +2681,7 @@ pmap_is_modified(pg)
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pv_flags = pa_to_pvflags(pa);
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head = pa_to_pvhead(pa);
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s = splpmap();
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s = splvm();
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if ((*pv_flags & PV_MOD) == 0)
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*pv_flags |= pv_syncflags(*head);
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rv = (*pv_flags & PV_MOD);
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@ -2717,7 +2714,7 @@ pmap_clear_reference(pg)
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pv_flags = pa_to_pvflags(pa);
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head = pa_to_pvhead(pa);
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s = splpmap();
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s = splvm();
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*pv_flags |= pv_syncflags(*head);
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rv = *pv_flags & PV_REF;
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*pv_flags &= ~PV_REF;
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@ -2749,7 +2746,7 @@ pmap_is_referenced(pg)
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pv_flags = pa_to_pvflags(pa);
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head = pa_to_pvhead(pa);
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s = splpmap();
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s = splvm();
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if ((*pv_flags & PV_REF) == 0)
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*pv_flags |= pv_syncflags(*head);
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rv = (*pv_flags & PV_REF);
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@ -2801,7 +2798,7 @@ pmap_activate(p)
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int s;
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if (p == curproc) {
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s = splpmap();
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s = splvm();
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_pmap_switch(pmap);
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splx(s);
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}
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@ -2860,7 +2857,7 @@ pmap_unwire(pmap, va)
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ptenum = VA_PTE_NUM(va);
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wiremask = 1 << ptenum;
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s = splpmap();
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s = splvm();
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saved_ctx = get_context();
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set_context(KERNEL_CONTEXT);
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@ -2909,7 +2906,7 @@ pmap_extract(pmap, va, pap)
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int saved_ctx;
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pte = 0;
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s = splpmap();
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s = splvm();
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if (pmap == kernel_pmap) {
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saved_ctx = get_context();
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@ -2966,7 +2963,7 @@ pmap_page_protect(pg, prot)
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if (PA_IS_DEV(pa))
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return;
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s = splpmap();
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s = splvm();
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#ifdef PMAP_DEBUG
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if (pmap_debug & PMD_PROTECT)
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@ -3088,7 +3085,7 @@ pmap_protect1(pmap, sva, eva)
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int old_ctx, s, sme;
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boolean_t in_ctx;
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s = splpmap();
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s = splvm();
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#ifdef DIAGNOSTIC
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if (m68k_trunc_seg(sva) != m68k_trunc_seg(eva-1))
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@ -3344,7 +3341,7 @@ pmap_remove1(pmap, sva, eva)
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int old_ctx, s, sme;
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boolean_t in_ctx;
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s = splpmap();
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s = splvm();
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#ifdef DIAGNOSTIC
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if (m68k_trunc_seg(sva) != m68k_trunc_seg(eva-1))
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@ -3686,7 +3683,7 @@ pmap_copy_page(src, dst)
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int s;
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int saved_ctx;
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s = splpmap();
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s = splvm();
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#ifdef PMAP_DEBUG
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if (pmap_debug & PMD_COW)
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@ -3733,7 +3730,7 @@ pmap_zero_page(pa)
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int s;
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int saved_ctx;
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s = splpmap();
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s = splvm();
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#ifdef PMAP_DEBUG
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if (pmap_debug & PMD_COW)
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