diff options
author | dt <dt@FreeBSD.org> | 1999-06-08 17:03:28 +0000 |
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committer | dt <dt@FreeBSD.org> | 1999-06-08 17:03:28 +0000 |
commit | 309c487efd7aaa6300e27a2fedac55d365d7a5a7 (patch) | |
tree | 98f40617f3cf9da46329e620c40cbe008cbfe8f1 /sys | |
parent | 6f2e7884b67738b227642fd6afda105bdbc49a5d (diff) | |
download | FreeBSD-src-309c487efd7aaa6300e27a2fedac55d365d7a5a7.zip FreeBSD-src-309c487efd7aaa6300e27a2fedac55d365d7a5a7.tar.gz |
Add a function kmem_alloc_nofault() - same as kmem_alloc_pageable(), but
create a nofault entry. It will be used to allocate kmem for upages.
(I am not too happy with all this, but it's better than nothing).
Diffstat (limited to 'sys')
-rw-r--r-- | sys/vm/vm_extern.h | 3 | ||||
-rw-r--r-- | sys/vm/vm_kern.c | 26 |
2 files changed, 27 insertions, 2 deletions
diff --git a/sys/vm/vm_extern.h b/sys/vm/vm_extern.h index 544ff30..93c9c60 100644 --- a/sys/vm/vm_extern.h +++ b/sys/vm/vm_extern.h @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)vm_extern.h 8.2 (Berkeley) 1/12/94 - * $Id: vm_extern.h,v 1.40 1999/01/26 02:49:52 julian Exp $ + * $Id: vm_extern.h,v 1.41 1999/04/13 19:17:15 peter Exp $ */ #ifndef _VM_EXTERN_H_ @@ -64,6 +64,7 @@ int grow __P((struct proc *, size_t)); int grow_stack __P((struct proc *, size_t)); int kernacc __P((caddr_t, int, int)); vm_offset_t kmem_alloc __P((vm_map_t, vm_size_t)); +vm_offset_t kmem_alloc_nofault __P((vm_map_t, vm_size_t)); vm_offset_t kmem_alloc_pageable __P((vm_map_t, vm_size_t)); vm_offset_t kmem_alloc_wait __P((vm_map_t, vm_size_t)); void kmem_free __P((vm_map_t, vm_offset_t, vm_size_t)); diff --git a/sys/vm/vm_kern.c b/sys/vm/vm_kern.c index 16c6208..531dab2 100644 --- a/sys/vm/vm_kern.c +++ b/sys/vm/vm_kern.c @@ -61,7 +61,7 @@ * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. * - * $Id: vm_kern.c,v 1.53 1999/03/12 08:05:49 alc Exp $ + * $Id: vm_kern.c,v 1.54 1999/03/16 07:39:07 alc Exp $ */ /* @@ -121,6 +121,30 @@ kmem_alloc_pageable(map, size) } /* + * kmem_alloc_nofault: + * + * Same as kmem_alloc_pageable, except that it create a nofault entry. + */ + +vm_offset_t +kmem_alloc_nofault(map, size) + vm_map_t map; + register vm_size_t size; +{ + vm_offset_t addr; + register int result; + + size = round_page(size); + addr = vm_map_min(map); + result = vm_map_find(map, NULL, (vm_offset_t) 0, + &addr, size, TRUE, VM_PROT_ALL, VM_PROT_ALL, MAP_NOFAULT); + if (result != KERN_SUCCESS) { + return (0); + } + return (addr); +} + +/* * Allocate wired-down memory in the kernel's address map * or a submap. */ |