minix/servers/vm/vmproc.h
Ben Gras 32fbbd370c - pages that points to page directory values of all processes,
shared with the kernel, mapped into kernel address space; 
   kernel is notified of its location. kernel segment size is
   increased to make it fit.
 - map in kernel and other processes that don't have their
   own page table using single 4MB (global) mapping.
 - new sanity check facility: objects that are allocated with
   the slab allocator are, when running with sanity checking on,
   marked readonly until they are explicitly unlocked using the USE()
   macro.
 - another sanity check facility: collect all uses of memory and
   see if they don't overlap with (a) eachother and (b) free memory
 - own munmap() and munmap_text() functions.
 - exec() recovers from out-of-memory conditions properly now; this
   solves some weird exec() behaviour
 - chew off memory from the same side of the chunk as where we
   start scanning, solving some memory fragmentation issues
 - use avl trees for freelist and phys_ranges in regions
 - implement most useful part of munmap()
 - remap() stuff is GQ's for shared memory
2009-09-21 14:49:49 +00:00

65 lines
1.6 KiB
C

#ifndef _VMPROC_H
#define _VMPROC_H 1
#include <pagetable.h>
#include <arch_vmproc.h>
#include <minix/bitmap.h>
#include "vm.h"
struct vmproc;
typedef void (*callback_t)(struct vmproc *who, message *m);
struct vmproc {
struct vm_arch vm_arch; /* architecture-specific data */
int vm_flags;
endpoint_t vm_endpoint;
pt_t vm_pt; /* page table data, if VMF_HASPT is set */
vir_bytes vm_stacktop; /* top of stack as seen from process */
vir_bytes vm_offset; /* offset of addr 0 for process */
/* File identification for cs sharing. */
ino_t vm_ino; /* inode number of file */
dev_t vm_dev; /* device number of file system */
time_t vm_ctime; /* inode changed time */
/* Regions in virtual address space. */
struct vir_region *vm_regions;
int vm_count;
/* Heap for brk() to extend. */
struct vir_region *vm_heap;
#define VM_CALL_PRIV_MASK_SIZE BITMAP_CHUNKS(VM_NCALLS)
bitchunk_t vm_call_priv_mask[VM_CALL_PRIV_MASK_SIZE];
/* State for requests pending to be done to vfs on behalf of
* this process.
*/
callback_t vm_callback; /* function to call on vfs reply */
int vm_callback_type; /* expected message type */
int vm_slot; /* process table slot */
union {
struct {
cp_grant_id_t gid;
} open; /* VM_VFS_OPEN */
} vm_state; /* Callback state. */
#if VMSTATS
int vm_bytecopies;
#endif
};
/* Bits for vm_flags */
#define VMF_INUSE 0x001 /* slot contains a process */
#define VMF_SEPARATE 0x002 /* separate i&d */
#define VMF_HASPT 0x004 /* has private page table */
#define VMF_EXITING 0x008 /* PM is cleaning up this process */
#define VMF_HAS_DMA 0x010 /* Process directly or indirectly granted
* DMA buffers.
*/
#endif