include/kernel/vm_priv.h

   1 /*
   2 ** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
   3 ** Distributed under the terms of the NewOS License.
   4 */
   5 #ifndef _KERNEL_VM_PRIV_H
   6 #define _KERNEL_VM_PRIV_H
   7
   8 #include <kernel/vm.h>
   9 #include <kernel/khash.h>
  10
  11 /* should make these scale with the system */
  12 #define DEFAULT_KERNEL_WORKING_SET  1024
  13 #define DEFAULT_WORKING_SET         256
  14 #define DEFAULT_MAX_WORKING_SET     65536
  15 #define DEFAULT_MIN_WORKING_SET     64
  16
  17 #define WORKING_SET_INCREMENT       32
  18 #define WORKING_SET_DECREMENT       32
  19
  20 #define PAGE_DAEMON_INTERVAL 500000
  21 #define PAGE_SCAN_QUANTUM 500
  22 #define WORKING_SET_ADJUST_INTERVAL 5000000
  23 #define MAX_FAULTS_PER_SECOND 100
  24 #define MIN_FAULTS_PER_SECOND 10
  25
  26 #define WRITE_COUNT 1024
  27 #define READ_COUNT 1
  28
  29 // page attributes
  30 #define PAGE_MODIFIED 0x04
  31 #define PAGE_ACCESSED 0x08
  32 #define PAGE_PRESENT  0x10
  33
  34 // Should only be used by vm internals
  35 int vm_page_fault(addr address, addr fault_address, bool is_write, bool is_user, addr *newip);
  36 void vm_increase_max_commit(addr delta);
  37 int vm_daemon_init(void);
  38
  39 // used by the page daemon to walk the list of address spaces
  40 int vm_aspace_walk_start(struct hash_iterator *i);
  41 vm_address_space *vm_aspace_walk_next(struct hash_iterator *i);
  42
  43 // get some data about the number of pages in the system
  44 addr vm_page_num_pages(void);
  45 addr vm_page_num_free_pages(void);
  46
  47 // allocates memory from the ka structure
  48 addr vm_alloc_from_ka_struct(kernel_args *ka, unsigned int size, int lock);
  49
  50 #endif
  51