minix/servers/vm/vmproc.h

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#ifndef _VMPROC_H
#define _VMPROC_H 1
#include <pagetable.h>
#include <arch_vmproc.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;
/* 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