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Soften assert in pmap_remove_all.

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Introduct pmap_extract_and_hold.

Stolen from: sparc64
This commit is contained in:
Peter Grehan 2003-09-22 11:59:05 +00:00
parent 250fe3a662
commit 84792e72d6
3 changed files with 75 additions and 12 deletions
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29
sys/powerpc/aim/mmu_oea.c
View File

@ -1054,6 +1054,29 @@ pmap_extract(pmap_t pm, vm_offset_t va)
return (0);
}
/*
* Atomically extract and hold the physical page with the given
* pmap and virtual address pair if that mapping permits the given
* protection.
*/
vm_page_t
pmap_extract_and_hold(pmap_t pmap, vm_offset_t va, vm_prot_t prot)
{
vm_paddr_t pa;
vm_page_t m;
m = NULL;
mtx_lock(&Giant);
if ((pa = pmap_extract(pmap, va)) != 0) {
m = PHYS_TO_VM_PAGE(pa);
vm_page_lock_queues();
vm_page_hold(m);
vm_page_unlock_queues();
}
mtx_unlock(&Giant);
return (m);
}
/*
* Grow the number of kernel page table entries. Unneeded.
*/
@ -1536,10 +1559,8 @@ pmap_remove_all(vm_page_t m)
struct pvo_head *pvo_head;
struct pvo_entry *pvo, *next_pvo;
KASSERT((m->flags & (PG_FICTITIOUS|PG_UNMANAGED)) == 0,
("pv_remove_all: illegal for unmanaged page %#x",
VM_PAGE_TO_PHYS(m)));
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
pvo_head = vm_page_to_pvoh(m);
for (pvo = LIST_FIRST(pvo_head); pvo != NULL; pvo = next_pvo) {
next_pvo = LIST_NEXT(pvo, pvo_vlink);

29
sys/powerpc/powerpc/mmu_oea.c
View File

@ -1054,6 +1054,29 @@ pmap_extract(pmap_t pm, vm_offset_t va)
return (0);
}
/*
* Atomically extract and hold the physical page with the given
* pmap and virtual address pair if that mapping permits the given
* protection.
*/
vm_page_t
pmap_extract_and_hold(pmap_t pmap, vm_offset_t va, vm_prot_t prot)
{
vm_paddr_t pa;
vm_page_t m;
m = NULL;
mtx_lock(&Giant);
if ((pa = pmap_extract(pmap, va)) != 0) {
m = PHYS_TO_VM_PAGE(pa);
vm_page_lock_queues();
vm_page_hold(m);
vm_page_unlock_queues();
}
mtx_unlock(&Giant);
return (m);
}
/*
* Grow the number of kernel page table entries. Unneeded.
*/
@ -1536,10 +1559,8 @@ pmap_remove_all(vm_page_t m)
struct pvo_head *pvo_head;
struct pvo_entry *pvo, *next_pvo;
KASSERT((m->flags & (PG_FICTITIOUS|PG_UNMANAGED)) == 0,
("pv_remove_all: illegal for unmanaged page %#x",
VM_PAGE_TO_PHYS(m)));
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
pvo_head = vm_page_to_pvoh(m);
for (pvo = LIST_FIRST(pvo_head); pvo != NULL; pvo = next_pvo) {
next_pvo = LIST_NEXT(pvo, pvo_vlink);

29
sys/powerpc/powerpc/pmap.c
View File

@ -1054,6 +1054,29 @@ pmap_extract(pmap_t pm, vm_offset_t va)
return (0);
}
/*
* Atomically extract and hold the physical page with the given
* pmap and virtual address pair if that mapping permits the given
* protection.
*/
vm_page_t
pmap_extract_and_hold(pmap_t pmap, vm_offset_t va, vm_prot_t prot)
{
vm_paddr_t pa;
vm_page_t m;
m = NULL;
mtx_lock(&Giant);
if ((pa = pmap_extract(pmap, va)) != 0) {
m = PHYS_TO_VM_PAGE(pa);
vm_page_lock_queues();
vm_page_hold(m);
vm_page_unlock_queues();
}
mtx_unlock(&Giant);
return (m);
}
/*
* Grow the number of kernel page table entries. Unneeded.
*/
@ -1536,10 +1559,8 @@ pmap_remove_all(vm_page_t m)
struct pvo_head *pvo_head;
struct pvo_entry *pvo, *next_pvo;
KASSERT((m->flags & (PG_FICTITIOUS|PG_UNMANAGED)) == 0,
("pv_remove_all: illegal for unmanaged page %#x",
VM_PAGE_TO_PHYS(m)));
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
pvo_head = vm_page_to_pvoh(m);
for (pvo = LIST_FIRST(pvo_head); pvo != NULL; pvo = next_pvo) {
next_pvo = LIST_NEXT(pvo, pvo_vlink);