Basic VM and other minor improvements.

Not complete, probably not fully debugged or optimized.

servers/vm/vmproc.h

@@ -0,0 +1,59 @@
+
+#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 */
+
+	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