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[src/trunk]: src/sys/common/pmap/tlb Change seg_tab to seg_ptr and make it a ...
details: https://anonhg.NetBSD.org/src/rev/283a8e68f8de
branches: trunk
changeset: 780003:283a8e68f8de
user: matt <matt%NetBSD.org@localhost>
date: Thu Jul 05 17:24:54 2012 +0000
description:
Change seg_tab to seg_ptr and make it a void * from a pt_entry_t * since it
also needs to point to struct pmap_segtab * when used in a 3-level page table.
diffstat:
sys/common/pmap/tlb/pmap.h | 4 +-
sys/common/pmap/tlb/pmap_segtab.c | 45 +++++++++++++++++++-------------------
2 files changed, 24 insertions(+), 25 deletions(-)
diffs (175 lines):
diff -r f56ea2bf813b -r 283a8e68f8de sys/common/pmap/tlb/pmap.h
--- a/sys/common/pmap/tlb/pmap.h Thu Jul 05 17:21:02 2012 +0000
+++ b/sys/common/pmap/tlb/pmap.h Thu Jul 05 17:24:54 2012 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.h,v 1.14 2012/07/05 16:55:11 matt Exp $ */
+/* $NetBSD: pmap.h,v 1.15 2012/07/05 17:24:54 matt Exp $ */
/*
* Copyright (c) 1992, 1993
@@ -95,7 +95,7 @@
* Each seg_tab point an array of pt_entry [NPTEPG]
*/
struct pmap_segtab {
- pt_entry_t *seg_tab[PMAP_SEGTABSIZE];
+ void *seg_ptr[PMAP_SEGTABSIZE];
};
#ifdef _KERNEL
diff -r f56ea2bf813b -r 283a8e68f8de sys/common/pmap/tlb/pmap_segtab.c
--- a/sys/common/pmap/tlb/pmap_segtab.c Thu Jul 05 17:21:02 2012 +0000
+++ b/sys/common/pmap/tlb/pmap_segtab.c Thu Jul 05 17:24:54 2012 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap_segtab.c,v 1.6 2012/07/05 16:55:11 matt Exp $ */
+/* $NetBSD: pmap_segtab.c,v 1.7 2012/07/05 17:24:54 matt Exp $ */
/*-
* Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
@@ -67,7 +67,7 @@
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap_segtab.c,v 1.6 2012/07/05 16:55:11 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap_segtab.c,v 1.7 2012/07/05 17:24:54 matt Exp $");
/*
* Manages physical address maps.
@@ -135,11 +135,11 @@
struct pmap_segtab *stp = pmap->pm_segtab;
KASSERT(pmap != pmap_kernel() || !pmap_md_direct_mapped_vaddr_p(va));
#ifdef _LP64
- stp = stp->seg_seg[(va >> XSEGSHIFT) & (NSEGPG - 1)];
+ stp = stp->seg_ptr[(va >> XSEGSHIFT) & (NSEGPG - 1)];
if (stp == NULL)
return NULL;
#endif
- return stp->seg_tab[(va >> SEGSHIFT) & (PMAP_SEGTABSIZE - 1)];
+ return stp->seg_ptr[(va >> SEGSHIFT) & (PMAP_SEGTABSIZE - 1)];
}
pt_entry_t *
@@ -159,7 +159,7 @@
* Insert the the segtab into the segtab freelist.
*/
mutex_spin_enter(&pmap_segtab_lock);
- stp->seg_tab[0] = (void *) pmap_segtab_info.free_segtab;
+ stp->seg_ptr[0] = pmap_segtab_info.free_segtab;
pmap_segtab_info.free_segtab = stp;
SEGTAB_ADD(nput, 1);
mutex_spin_exit(&pmap_segtab_lock);
@@ -173,16 +173,16 @@
paddr_t pa;
#ifdef _LP64
if (level > 0) {
- if (stp->seg_seg[i] != NULL) {
- pmap_segtab_release(stp->seg_seg[i], level - 1);
- stp->seg_seg[i] = NULL;
+ if (stp->seg_ptr[i] != NULL) {
+ pmap_segtab_release(stp->seg_ptr[i], level - 1);
+ stp->seg_ptr[i] = NULL;
}
continue;
}
#endif
/* get pointer to segment map */
- pt_entry_t *pte = stp->seg_tab[i];
+ pt_entry_t *pte = stp->seg_ptr[i];
if (pte == NULL)
continue;
#ifdef PARANOIADIAG
@@ -195,7 +195,7 @@
pa = POOL_VTOPHYS(pte);
uvm_pagefree(PHYS_TO_VM_PAGE(pa));
- stp->seg_tab[i] = NULL;
+ stp->seg_ptr[i] = NULL;
}
pmap_segtab_free(stp);
@@ -221,9 +221,8 @@
again:
mutex_spin_enter(&pmap_segtab_lock);
if (__predict_true((stp = pmap_segtab_info.free_segtab) != NULL)) {
- pmap_segtab_info.free_segtab =
- (struct pmap_segtab *)stp->seg_tab[0];
- stp->seg_tab[0] = NULL;
+ pmap_segtab_info.free_segtab = stp->seg_ptr[0];
+ stp->seg_ptr[0] = NULL;
SEGTAB_ADD(nget, 1);
}
mutex_spin_exit(&pmap_segtab_lock);
@@ -248,13 +247,13 @@
* link all the segtabs in this page together
*/
for (size_t i = 1; i < n - 1; i++) {
- stp[i].seg_tab[0] = (void *)&stp[i+1];
+ stp[i].seg_ptr[0] = (void *)&stp[i+1];
}
/*
* Now link the new segtabs into the free segtab list.
*/
mutex_spin_enter(&pmap_segtab_lock);
- stp[n-1].seg_tab[0] = (void *)pmap_segtab_info.free_segtab;
+ stp[n-1].seg_ptr[0] = pmap_segtab_info.free_segtab;
pmap_segtab_info.free_segtab = stp + 1;
SEGTAB_ADD(nput, n - 1);
mutex_spin_exit(&pmap_segtab_lock);
@@ -263,8 +262,8 @@
#ifdef PARANOIADIAG
for (i = 0; i < PMAP_SEGTABSIZE; i++) {
- if (stp->seg_tab[i] != 0)
- panic("pmap_create: pm_segtab.seg_tab[%zu] != 0");
+ if (stp->seg_ptr[i] != 0)
+ panic("pmap_create: pm_segtab.seg_ptr[%zu] != 0");
}
#endif
return stp;
@@ -313,7 +312,7 @@
} else {
l->l_cpu->ci_pmap_user_segtab = pm->pm_segtab;
#ifdef _LP64
- l->l_cpu->ci_pmap_user_seg0tab = pm->pm_segtab->seg_seg[0];
+ l->l_cpu->ci_pmap_user_seg0tab = pm->pm_segtab->seg_ptr[0];
#endif
}
}
@@ -370,8 +369,8 @@
pte = pmap_pte_lookup(pmap, va);
if (__predict_false(pte == NULL)) {
#ifdef _LP64
- struct pmap_segtab ** const stp_p =
- &stp->seg_seg[(va >> XSEGSHIFT) & (NSEGPG - 1)];
+ void ** const stp_p =
+ &stp->seg_ptr[(va >> XSEGSHIFT) & (NSEGPG - 1)];
if (__predict_false((stp = *stp_p) == NULL)) {
struct pmap_segtab *nstp = pmap_segtab_alloc();
#ifdef MULTIPROCESSOR
@@ -385,7 +384,7 @@
#endif /* MULTIPROCESSOR */
stp = nstp;
}
- KASSERT(stp == pmap->pm_segtab->seg_seg[(va >> XSEGSHIFT) & (NSE
+ KASSERT(stp == pmap->pm_segtab->seg_ptr[(va >> XSEGSHIFT) & (NSE
GPG - 1)]);
#endif /* _LP64 */
struct vm_page * const pg = pmap_pte_pagealloc();
@@ -400,7 +399,7 @@
pte = (pt_entry_t *)POOL_PHYSTOV(pa);
#ifdef MULTIPROCESSOR
pt_entry_t *opte = atomic_cas_ptr(
- &stp->seg_tab[va >> SEGSHIFT], NULL, pte);
+ &stp->seg_ptr[va >> SEGSHIFT], NULL, pte);
/*
* If another thread allocated the segtab needed for this va
* free the page we just allocated.
@@ -410,7 +409,7 @@
pte = opte;
}
#else
- stp->seg_tab[va >> SEGSHIFT] = pte;
+ stp->seg_ptr[va >> SEGSHIFT] = pte;
#endif
pte += (va >> PGSHIFT) & (NPTEPG - 1);
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