projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 619edcce KM |
1 | /* |
| 2 | * Copyright (c) 1990 University of Utah. | |
| 3 | * Copyright (c) 1991 The Regents of the University of California. | |
| 4 | * All rights reserved. | |
| 5 | * | |
| 6 | * This code is derived from software contributed to Berkeley by | |
| 7 | * the Systems Programming Group of the University of Utah Computer | |
| 8 | * Science Department. | |
| 9 | * | |
| 10 | * %sccs.include.redist.c% | |
| 11 | * | |
| 12 | * @(#)device_pager.h 7.1 (Berkeley) %G% | |
| 13 | */ | |
| 14 | ||
| 15 | #ifndef _DEVICE_PAGER_ | |
| 16 | #define _DEVICE_PAGER_ 1 | |
| 17 | ||
| 18 | /* | |
| 19 | * Device pager private data. | |
| 20 | */ | |
| 21 | struct devpager { | |
| 22 | queue_head_t devp_list; /* list of managed devices */ | |
| 23 | dev_t devp_dev; /* devno of device */ | |
| 24 | vm_page_t devp_pages; /* page structs for device */ | |
| 25 | int devp_npages; /* size of device in pages */ | |
| 26 | int devp_count; /* reference count */ | |
| 27 | vm_object_t devp_object; /* object representing this device */ | |
| 28 | }; | |
| 29 | typedef struct devpager *dev_pager_t; | |
| 30 | ||
| 31 | #define DEV_PAGER_NULL ((dev_pager_t)0) | |
| 32 | ||
| 33 | #ifdef KERNEL | |
| 34 | ||
| 35 | void dev_pager_init(); | |
| 36 | vm_pager_t dev_pager_alloc(); | |
| 37 | void dev_pager_dealloc(); | |
| 38 | boolean_t dev_pager_getpage(), dev_pager_putpage(); | |
| 39 | boolean_t dev_pager_haspage(); | |
| 40 | ||
| 41 | struct pagerops devicepagerops = { | |
| 42 | dev_pager_init, | |
| 43 | dev_pager_alloc, | |
| 44 | dev_pager_dealloc, | |
| 45 | dev_pager_getpage, | |
| 46 | dev_pager_putpage, | |
| 47 | dev_pager_haspage | |
| 48 | }; | |
| 49 | ||
| 50 | #endif | |
| 51 | ||
| 52 | #endif /* _DEVICE_PAGER_ */ |