Module Name: src
Committed By: reinoud
Date: Tue Aug 23 12:06:14 UTC 2011
Modified Files:
src/sys/arch/usermode/usermode: pmap.c
Log Message:
Initial implementation of pmap_remove()
Also cleaned up some debug output to be aprint_debug()'d.
To generate a diff of this commit:
cvs rdiff -u -r1.15 -r1.16 src/sys/arch/usermode/usermode/pmap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/usermode/usermode/pmap.c
diff -u src/sys/arch/usermode/usermode/pmap.c:1.15 src/sys/arch/usermode/usermode/pmap.c:1.16
--- src/sys/arch/usermode/usermode/pmap.c:1.15 Tue Aug 23 11:36:11 2011
+++ src/sys/arch/usermode/usermode/pmap.c Tue Aug 23 12:06:14 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.15 2011/08/23 11:36:11 reinoud Exp $ */
+/* $NetBSD: pmap.c,v 1.16 2011/08/23 12:06:14 reinoud Exp $ */
/*-
* Copyright (c) 2011 Reinoud Zandijk <[email protected]>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.15 2011/08/23 11:36:11 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.16 2011/08/23 12:06:14 reinoud Exp $");
#include "opt_uvmhist.h"
#include "opt_memsize.h"
@@ -90,7 +90,8 @@
static struct pv_entry *pv_get(pmap_t pmap, int ppn, int lpn);
static struct pv_entry *pv_alloc(void);
-//static void pv_free(struct pv_entry *pv);
+static void pv_free(struct pv_entry *pv);
+void pmap_remove(pmap_t pmap, vaddr_t sva, vaddr_t eva);
/* exposed to signal handler */
vaddr_t kmem_k_start, kmem_k_end;
@@ -361,13 +362,11 @@
return malloc(sizeof(struct pv_entry), M_VMPMAP, M_NOWAIT | M_ZERO);
}
-#if 0
static void
pv_free(struct pv_entry *pv)
{
free(pv, M_VMPMAP);
}
-#endif
static struct pv_entry *
pv_get(pmap_t pmap, int ppn, int lpn)
@@ -421,7 +420,7 @@
addr = thunk_mmap((void *) va, PAGE_SIZE, pv->pv_mmap_ppl,
MAP_FILE | MAP_FIXED,
mem_fh, pa);
-printf("page_activate: (va %p, pa %p, ppl %d) -> %p\n", (void *) va, (void *) pa, pv->pv_mmap_ppl, (void *) addr);
+aprint_debug("page_activate: (va %p, pa %p, ppl %d) -> %p\n", (void *) va, (void *) pa, pv->pv_mmap_ppl, (void *) addr);
if (addr != (void *) va)
panic("pmap_page_activate: mmap failed");
}
@@ -538,14 +537,86 @@
int
pmap_enter(pmap_t pmap, vaddr_t va, paddr_t pa, vm_prot_t prot, u_int flags)
{
-printf("pmap_enter %p : v %p, p %p, prot %d, flags %d\n", (void *) pmap, (void *) va, (void *) pa, (int) prot, (int) flags);
+ aprint_debug("pmap_enter %p : v %p, p %p, prot %d, flags %d\n",
+ (void *) pmap, (void *) va, (void *) pa, (int) prot, (int) flags);
return pmap_do_enter(pmap, va, pa, prot, flags, 0);
}
+/* release the pv_entry for a mapping. Code derived also from hp300 pmap */
+static void
+pv_release(pmap_t pmap, int ppn, int lpn)
+{
+ struct pv_entry *pv, *npv;
+
+ UVMHIST_FUNC("pv_release");
+ UVMHIST_CALLED(pmaphist);
+ UVMHIST_LOG(pmaphist, "(pmap=%p, ppn=%d, lpn=%d)", pmap, ppn, lpn, 0);
+
+printf("pv_release ppn %d, lpn %d\n", ppn, lpn);
+ pv = &pv_table[ppn];
+ /*
+ * If it is the first entry on the list, it is actually
+ * in the header and we must copy the following entry up
+ * to the header. Otherwise we must search the list for
+ * the entry. In either case we free the now unused entry.
+ */
+ if (pmap == pv->pv_pmap && lpn == pv->pv_lpn) {
+ npv = pv->pv_next;
+ if (npv) {
+ UVMHIST_LOG(pmaphist, "pv=%p; pull-up", pv, 0, 0, 0);
+ /* Pull up first entry from chain. */
+ memcpy(pv, npv, offsetof(struct pv_entry, pv_pflags));
+ pv->pv_pmap->pm_entries[pv->pv_lpn] = pv;
+ pv_free(npv);
+ } else {
+ UVMHIST_LOG(pmaphist, "pv=%p; empty", pv, 0, 0, 0);
+ memset(pv, 0, offsetof(struct pv_entry, pv_pflags));
+ }
+ } else {
+ for (npv = pv->pv_next; npv; npv = npv->pv_next) {
+ if (pmap == npv->pv_pmap && lpn == npv->pv_lpn)
+ break;
+ pv = npv;
+ }
+ KASSERT(npv != NULL);
+ UVMHIST_LOG(pmaphist, "pv=%p; tail", pv, 0, 0, 0);
+ pv->pv_next = npv->pv_next;
+ pv_free(npv);
+ }
+ pmap->pm_entries[lpn] = NULL;
+ pmap->pm_stats.resident_count--;
+}
+
void
pmap_remove(pmap_t pmap, vaddr_t sva, vaddr_t eva)
{
-panic("pmap_remove() called\n");
+ int slpn, elpn, lpn, s;
+ struct pv_entry *pv;
+
+ UVMHIST_FUNC("pmap_remove");
+ UVMHIST_CALLED(pmaphist);
+printf("pmap_remove() called\n");
+
+ slpn = atop(sva); elpn = atop(eva);
+ UVMHIST_LOG(pmaphist, "clearing from lpn %d to lpn %d in pmap %p",
+ slpn, elpn - 1, pmap, 0);
+ s = splvm();
+ for (lpn = slpn; lpn < elpn; lpn++) {
+ pv = pmap->pm_entries[lpn];
+ if (pv != NULL) {
+ if (pmap->pm_flags & PM_ACTIVE) {
+printf("pmap_remove: haven't removed old mmap yet\n");
+// MEMC_WRITE(pv->pv_deactivate);
+// cpu_cache_flush();
+ }
+ pmap->pm_entries[lpn] = NULL;
+ if (pv->pv_vflags & PV_WIRED)
+ pmap->pm_stats.wired_count--;
+ pv_release(pmap, pv->pv_ppn, lpn);
+ }
+ }
+ splx(s);
+
}
void
@@ -591,7 +662,8 @@
void
pmap_kenter_pa(vaddr_t va, paddr_t pa, vm_prot_t prot, u_int flags)
{
-printf("pmap_kenter_pa : v %p, p %p, prot %d, flags %d\n", (void *) va, (void *) pa, (int) prot, (int) flags);
+ aprint_debug("pmap_kenter_pa : v %p, p %p, prot %d, flags %d\n",
+ (void *) va, (void *) pa, (int) prot, (int) flags);
pmap_do_enter(pmap_kernel(), va, pa, prot, prot | PMAP_WIRED, 1);
}
@@ -682,7 +754,9 @@
vaddr_t
pmap_growkernel(vaddr_t maxkvaddr)
{
-printf("pmap_growkernel: till %p (adding %"PRIu64" KB)\n", (void *) maxkvaddr, (uint64_t) (maxkvaddr - kmem_ext_cur_end)/1024);
+ aprint_debug("pmap_growkernel: till %p (adding %"PRIu64" KB)\n",
+ (void *) maxkvaddr,
+ (uint64_t) (maxkvaddr - kmem_ext_cur_end)/1024);
if (maxkvaddr > kmem_ext_end)
return kmem_ext_end;
kmem_ext_cur_end = maxkvaddr;
