Annotation of sys/uvm/uvm.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: uvm.h,v 1.21 2007/06/18 21:51:15 pedro Exp $ */
! 2: /* $NetBSD: uvm.h,v 1.24 2000/11/27 08:40:02 chs Exp $ */
! 3:
! 4: /*
! 5: *
! 6: * Copyright (c) 1997 Charles D. Cranor and Washington University.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. All advertising materials mentioning features or use of this software
! 18: * must display the following acknowledgement:
! 19: * This product includes software developed by Charles D. Cranor and
! 20: * Washington University.
! 21: * 4. The name of the author may not be used to endorse or promote products
! 22: * derived from this software without specific prior written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 25: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 26: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 27: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 28: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 29: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 30: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 31: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 32: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 33: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 34: *
! 35: * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp
! 36: */
! 37:
! 38: #ifndef _UVM_UVM_H_
! 39: #define _UVM_UVM_H_
! 40:
! 41: #include <uvm/uvm_extern.h>
! 42:
! 43: #include <uvm/uvm_stat.h>
! 44:
! 45: /*
! 46: * pull in prototypes
! 47: */
! 48:
! 49: #include <uvm/uvm_amap.h>
! 50: #include <uvm/uvm_aobj.h>
! 51: #include <uvm/uvm_fault.h>
! 52: #include <uvm/uvm_glue.h>
! 53: #include <uvm/uvm_km.h>
! 54: #include <uvm/uvm_loan.h>
! 55: #include <uvm/uvm_map.h>
! 56: #include <uvm/uvm_object.h>
! 57: #include <uvm/uvm_page.h>
! 58: #include <uvm/uvm_pager.h>
! 59: #include <uvm/uvm_pdaemon.h>
! 60: #include <uvm/uvm_swap.h>
! 61: #ifdef UVM_SWAP_ENCRYPT
! 62: #include <uvm/uvm_swap_encrypt.h>
! 63: #endif
! 64:
! 65: /*
! 66: * pull in VM_NFREELIST
! 67: */
! 68: #include <machine/vmparam.h>
! 69:
! 70: /*
! 71: * uvm structure (vm global state: collected in one structure for ease
! 72: * of reference...)
! 73: */
! 74:
! 75: struct uvm {
! 76: /* vm_page related parameters */
! 77:
! 78: /* vm_page queues */
! 79: struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */
! 80: struct pglist page_active; /* allocated pages, in use */
! 81: struct pglist page_inactive_swp;/* pages inactive (reclaim or free) */
! 82: struct pglist page_inactive_obj;/* pages inactive (reclaim or free) */
! 83: simple_lock_data_t pageqlock; /* lock for active/inactive page q */
! 84: simple_lock_data_t fpageqlock; /* lock for free page q */
! 85: boolean_t page_init_done; /* TRUE if uvm_page_init() finished */
! 86: boolean_t page_idle_zero; /* TRUE if we should try to zero
! 87: pages in the idle loop */
! 88:
! 89: /* page daemon trigger */
! 90: int pagedaemon; /* daemon sleeps on this */
! 91: struct proc *pagedaemon_proc; /* daemon's pid */
! 92: simple_lock_data_t pagedaemon_lock;
! 93:
! 94: /* aiodone daemon trigger */
! 95: int aiodoned; /* daemon sleeps on this */
! 96: struct proc *aiodoned_proc; /* daemon's pid */
! 97: simple_lock_data_t aiodoned_lock;
! 98:
! 99: /* page hash */
! 100: struct pglist *page_hash; /* page hash table (vp/off->page) */
! 101: int page_nhash; /* number of buckets */
! 102: int page_hashmask; /* hash mask */
! 103: simple_lock_data_t hashlock; /* lock on page_hash array */
! 104:
! 105: /* static kernel map entry pool */
! 106: vm_map_entry_t kentry_free; /* free page pool */
! 107: simple_lock_data_t kentry_lock;
! 108:
! 109: /* aio_done is locked by uvm.pagedaemon_lock and splbio! */
! 110: TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */
! 111:
! 112: /* pager VM area bounds */
! 113: vaddr_t pager_sva; /* start of pager VA area */
! 114: vaddr_t pager_eva; /* end of pager VA area */
! 115:
! 116: /* swap-related items */
! 117: simple_lock_data_t swap_data_lock;
! 118:
! 119: /* kernel object: to support anonymous pageable kernel memory */
! 120: struct uvm_object *kernel_object;
! 121: };
! 122:
! 123: /*
! 124: * vm_map_entry etype bits:
! 125: */
! 126:
! 127: #define UVM_ET_OBJ 0x01 /* it is a uvm_object */
! 128: #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */
! 129: #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */
! 130: #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */
! 131:
! 132: #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0)
! 133: #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0)
! 134: #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0)
! 135: #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0)
! 136:
! 137: #ifdef _KERNEL
! 138:
! 139: /*
! 140: * holds all the internal UVM data
! 141: */
! 142: extern struct uvm uvm;
! 143:
! 144: /*
! 145: * historys
! 146: */
! 147: #ifdef UVMHIST
! 148: extern UVMHIST_DECL(maphist);
! 149: extern UVMHIST_DECL(pdhist);
! 150: extern UVMHIST_DECL(pghist);
! 151: #endif
! 152:
! 153: /*
! 154: * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the
! 155: * interlocked tsleep() function.
! 156: */
! 157:
! 158: #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \
! 159: do { \
! 160: (void) ltsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \
! 161: msg, timo, slock); \
! 162: } while (0)
! 163:
! 164: /*
! 165: * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
! 166: */
! 167:
! 168: #if defined(UVM_PAGE_TRKOWN)
! 169: #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
! 170: #else
! 171: #define UVM_PAGE_OWN(PG, TAG) /* nothing */
! 172: #endif /* UVM_PAGE_TRKOWN */
! 173:
! 174: /*
! 175: * pull in inlines
! 176: */
! 177:
! 178: #include <uvm/uvm_amap_i.h>
! 179: #include <uvm/uvm_fault_i.h>
! 180: #include <uvm/uvm_map_i.h>
! 181: #include <uvm/uvm_page_i.h>
! 182: #include <uvm/uvm_pager_i.h>
! 183:
! 184: #endif /* _KERNEL */
! 185:
! 186: #endif /* _UVM_UVM_H_ */
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