text: /* Function prototypes. */
  
  struct vmproc;
  struct stat;
  struct mem_map;
  struct memory;
  
  #include <minix/ipc.h>
  #include <minix/endpoint.h>
  #include <minix/safecopies.h>
  #include <timers.h>
  #include <stdio.h>
  #include <pagetable.h>
  #include "vmproc.h"
  #include "vm.h"
  
  /* alloc.c */
  _PROTOTYPE( phys_clicks alloc_mem_f, (phys_clicks clicks, u32_t flags)	);
  _PROTOTYPE( int do_adddma, (message *msg)                              );
  _PROTOTYPE( int do_deldma, (message *msg)                              );
  _PROTOTYPE( int do_getdma, (message *msg)                              );
  _PROTOTYPE( int do_allocmem, (message *msg)                              );
  _PROTOTYPE( void release_dma, (struct vmproc *vmp)       		);
  _PROTOTYPE( void memstats, (int *nodes, int *pages, int *largest)	);
  _PROTOTYPE( void printmemstats, (void)			       		);
  _PROTOTYPE( void usedpages_reset, (void)		       		);
  _PROTOTYPE( int usedpages_add_f, (phys_bytes phys, phys_bytes len,
  	char *file, int line) 	);
  _PROTOTYPE( void free_mem_f, (phys_clicks base, phys_clicks clicks)	);
  #define usedpages_add(a, l) usedpages_add_f(a, l, __FILE__, __LINE__)
  
  #define ALLOC_MEM(clicks, flags) alloc_mem_f(clicks, flags)
  #define FREE_MEM(base, clicks) free_mem_f(base, clicks)
  
  _PROTOTYPE( void mem_init, (struct memory *chunks)			);
  
  /* utility.c */
  _PROTOTYPE( int get_mem_map, (int proc_nr, struct mem_map *mem_map)     );
  _PROTOTYPE( void get_mem_chunks, (struct memory *mem_chunks));
  _PROTOTYPE( void reserve_proc_mem, (struct memory *mem_chunks,
          struct mem_map *map_ptr));
  _PROTOTYPE( int vm_isokendpt, (endpoint_t ep, int *proc)	     );
  _PROTOTYPE( int get_stack_ptr, (int proc_nr, vir_bytes *sp)             );
  _PROTOTYPE( int do_ctl, (message *)             );
  
  /* exit.c */
  _PROTOTYPE( void clear_proc, (struct vmproc *vmp)			);
  _PROTOTYPE( int do_exit, (message *msg)					);
  _PROTOTYPE( int do_willexit, (message *msg)				);
  _PROTOTYPE( void free_proc, (struct vmproc *vmp)			);
  
  /* fork.c */
  _PROTOTYPE( int do_fork, (message *msg)					);
  
  /* exec.c */
  _PROTOTYPE( struct vmproc *find_share, (struct vmproc *vmp_ign, Ino_t ino,
                          Dev_t dev, time_t ctime)                        );
  _PROTOTYPE( int do_exec_newmem, (message *msg)				);
  _PROTOTYPE( int proc_new, (struct vmproc *vmp, phys_bytes start,
  	phys_bytes text, phys_bytes data, phys_bytes stack, phys_bytes gap,
  	phys_bytes text_here, phys_bytes data_here, vir_bytes stacktop));
  _PROTOTYPE( phys_bytes find_kernel_top, (void)				);
  
  /* break.c */
  _PROTOTYPE( int do_brk, (message *msg)					);
  _PROTOTYPE( int adjust, (struct vmproc *rmp,
  	vir_clicks data_clicks, vir_bytes sp)           );
  _PROTOTYPE( int real_brk, (struct vmproc *vmp, vir_bytes v));
  
  /* signal.c */
  _PROTOTYPE( int do_push_sig, (message *msg)				);
  
  /* vfs.c */
  _PROTOTYPE( int do_vfs_reply, (message *msg)				);
  _PROTOTYPE( int vfs_open, (struct vmproc *for_who, callback_t callback,
          cp_grant_id_t filename_gid, int filename_len, int flags, int mode));
  _PROTOTYPE( int vfs_close, (struct vmproc *for_who, callback_t callback,
  	int fd));
  
  /* mmap.c */
  _PROTOTYPE(int do_mmap, (message *msg)					);
  _PROTOTYPE(int do_munmap, (message *msg)				);
  _PROTOTYPE(int do_map_phys, (message *msg)                              );
  _PROTOTYPE(int do_unmap_phys, (message *msg)                            );
  _PROTOTYPE(int do_remap, (message *m)                                   );
  _PROTOTYPE(int do_get_phys, (message *m)                                );
  _PROTOTYPE(int do_shared_unmap, (message *m)                            );
  _PROTOTYPE(int do_get_refcount, (message *m)                            );
  
  /* pagefaults.c */
  _PROTOTYPE( void do_pagefaults, (void)				);
  _PROTOTYPE( void do_memory, (void)				);
  _PROTOTYPE( char *pf_errstr, (u32_t err));
  _PROTOTYPE( int handle_memory, (struct vmproc *vmp, vir_bytes mem,
  	vir_bytes len, int wrflag));
  
  /* $(ARCH)/pagetable.c */
  _PROTOTYPE( void pt_init, (void)					);
  _PROTOTYPE( void pt_check, (struct vmproc *vmp)				);
  _PROTOTYPE( int pt_new, (pt_t *pt)					);
  _PROTOTYPE( void pt_free, (pt_t *pt)					);
  _PROTOTYPE( int pt_writemap, (pt_t *pt, vir_bytes v, phys_bytes physaddr, 
          size_t bytes, u32_t flags, u32_t writemapflags));
  _PROTOTYPE( int pt_checkrange, (pt_t *pt, vir_bytes v,  size_t bytes, int write));
  _PROTOTYPE( int pt_bind, (pt_t *pt, struct vmproc *who)			);
  _PROTOTYPE( void *vm_allocpage, (phys_bytes *p, int cat));
  _PROTOTYPE( void pt_cycle, (void));
  _PROTOTYPE( int pt_mapkernel, (pt_t *pt));
  _PROTOTYPE( void vm_pagelock, (void *vir, int lockflag) 		);
  
  #if SANITYCHECKS
  _PROTOTYPE( void pt_sanitycheck, (pt_t *pt, char *file, int line)	);
  #endif
  
  /* $(ARCH)/pagefaults.c */
  _PROTOTYPE( int arch_get_pagefault, (endpoint_t *who, vir_bytes *addr, u32_t *err));
  
  /* slaballoc.c */
  _PROTOTYPE(void *slaballoc,(int bytes));
  _PROTOTYPE(void slabfree,(void *mem, int bytes));
  _PROTOTYPE(void slabstats,(void));
  _PROTOTYPE(void slab_sanitycheck, (char *file, int line));
  #define SLABALLOC(var) (var = slaballoc(sizeof(*var)))
  #define SLABFREE(ptr) slabfree(ptr, sizeof(*(ptr)))
  #if SANITYCHECKS
  
  _PROTOTYPE(void slabunlock,(void *mem, int bytes));
  _PROTOTYPE(void slablock,(void *mem, int bytes));
  _PROTOTYPE(int slabsane_f,(char *file, int line, void *mem, int bytes));
  #endif
  
  /* region.c */
  _PROTOTYPE(struct vir_region * map_page_region,(struct vmproc *vmp, \
  	vir_bytes min, vir_bytes max, vir_bytes length, vir_bytes what, \
  	u32_t flags, int mapflags));
  _PROTOTYPE(struct vir_region * map_proc_kernel,(struct vmproc *dst));
  _PROTOTYPE(int map_region_extend,(struct vmproc *vmp, struct vir_region *vr, vir_bytes delta));
  _PROTOTYPE(int map_region_shrink,(struct vir_region *vr, vir_bytes delta));
  _PROTOTYPE(int map_unmap_region,(struct vmproc *vmp, struct vir_region *vr, vir_bytes len));
  _PROTOTYPE(int map_free_proc,(struct vmproc *vmp));
  _PROTOTYPE(int map_proc_copy,(struct vmproc *dst, struct vmproc *src));
  _PROTOTYPE(struct vir_region *map_lookup,(struct vmproc *vmp, vir_bytes addr));
  _PROTOTYPE(int map_pf,(struct vmproc *vmp,
  	struct vir_region *region, vir_bytes offset, int write));
  _PROTOTYPE(int map_handle_memory,(struct vmproc *vmp,
  	struct vir_region *region, vir_bytes offset, vir_bytes len, int write));
  _PROTOTYPE(void map_printmap, (struct vmproc *vmp));
  _PROTOTYPE(int map_writept, (struct vmproc *vmp));
  _PROTOTYPE(void printregionstats, (struct vmproc *vmp));
  
  _PROTOTYPE(struct vir_region * map_region_lookup_tag, (struct vmproc *vmp, u32_t tag));
  _PROTOTYPE(void map_region_set_tag, (struct vir_region *vr, u32_t tag));
  _PROTOTYPE(u32_t map_region_get_tag, (struct vir_region *vr));
  _PROTOTYPE(int map_remap, (struct vmproc *dvmp, vir_bytes da, size_t size,
  	struct vir_region *region, vir_bytes *r));
  _PROTOTYPE(int map_get_phys, (struct vmproc *vmp, vir_bytes addr, phys_bytes *r));
  _PROTOTYPE(int map_get_ref, (struct vmproc *vmp, vir_bytes addr, u8_t *cnt));
  
  #if SANITYCHECKS
  _PROTOTYPE(void map_sanitycheck,(char *file, int line));
  #endif
  
  /* $(ARCH)/vm.c */
  _PROTOTYPE( vir_bytes, arch_map2vir(struct vmproc *vmp, vir_bytes addr));
  _PROTOTYPE( char *, arch_map2str(struct vmproc *vmp, vir_bytes addr));
  _PROTOTYPE( vir_bytes, arch_vir2map(struct vmproc *vmp, vir_bytes addr));
  _PROTOTYPE( vir_bytes, arch_vir2map_text(struct vmproc *vmp, vir_bytes addr));
  _PROTOTYPE( vir_bytes, arch_addrok(struct vmproc *vmp, vir_bytes addr));
  
  /* rs.c */
  _PROTOTYPE(int do_rs_set_priv, (message *m));
  
  /* queryexit.c */
  _PROTOTYPE(int do_query_exit, (message *m));
  _PROTOTYPE(int do_notify_sig, (message *m));
  _PROTOTYPE(void init_query_exit, (void));
  