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This commit is contained in:
Bahadir Balban
2008-03-05 01:59:31 +00:00
parent 58b833dd7f
commit 5681f3d1cb
10 changed files with 209 additions and 219 deletions
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27
tasks/mm0/include/init.h
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@@ -1,9 +1,30 @@
/*
* Data that comes from the kernel, and other init data.
*
* Copyright (C) 2007 Bahadir Balban
*/
#ifndef __INIT_H__
#define __INIT_H__
#ifndef __MM_INIT_H__
#define __MM_INIT_H__
#include <l4/macros.h>
#include <l4/config.h>
#include <l4/types.h>
#include <l4/generic/physmem.h>
#include INC_PLAT(offsets.h)
#include INC_GLUE(memory.h)
#include INC_GLUE(memlayout.h)
#include INC_ARCH(bootdesc.h)
#include <vm_area.h>
struct initdata {
struct bootdesc *bootdesc;
struct page_bitmap page_map;
};
extern struct initdata initdata;
int request_initdata(struct initdata *i);
void initialise(void);
#endif /* __INIT_H__ */
#endif /* __MM_INIT_H__ */

29
tasks/mm0/include/kdata.h
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@@ -1,29 +0,0 @@
/*
* Data that comes from the kernel.
*
* Copyright (C) 2007 Bahadir Balban
*/
#ifndef __MM_KDATA_H__
#define __MM_KDATA_H__
#include <l4/macros.h>
#include <l4/config.h>
#include <l4/types.h>
#include <l4/generic/physmem.h>
#include INC_PLAT(offsets.h)
#include INC_GLUE(memory.h)
#include INC_GLUE(memlayout.h)
#include INC_ARCH(bootdesc.h)
#include <vm_area.h>
struct initdata {
struct bootdesc *bootdesc;
struct list_head boot_file_list;
struct page_bitmap page_map;
};
extern struct initdata initdata;
int request_initdata(struct initdata *i);
#endif /* __MM_KDATA_H__ */

10
tasks/mm0/include/proc.h
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@@ -3,11 +3,11 @@
#include <vm_area.h>
struct proc_files {
struct vm_object *stack_file; /* ZI, RO: devzero, RW: private */
struct vm_object *env_file; /* NON-ZI, RO: private, RW: private */
struct vm_object *data_file; /* NON-ZI, RO: shared, RW: private */
struct vm_object *bss_file; /* ZI, RO: devzero, RW: private */
struct proc_vm_objects {
struct vm_object *stack; /* ZI, RO: devzero, RW: private */
struct vm_object *env; /* NON-ZI, RO: private, RW: private */
struct vm_object *data; /* NON-ZI, RO: shared, RW: private */
struct vm_object *bss; /* ZI, RO: devzero, RW: private */
};
int task_setup_vm_objects(struct tcb *t);

43
tasks/mm0/include/vm_area.h
View File

@@ -1,5 +1,5 @@
/*
* Virtual memory area descriptors. No page cache yet.
* Virtual memory area descriptors.
*
* Copyright (C) 2007 Bahadir Balban
*/
@@ -20,17 +20,17 @@
#define VM_WRITE (1 << 2)
#define VM_EXEC (1 << 3)
#define VM_PROT_MASK (VM_READ | VM_WRITE | VM_EXEC)
#define VM_SWAPPED (1 << 4)
/* VMA flags */
/* Shared copy of a file */
#define VMA_SHARED (1 << 3)
/* VMA that's not file-backed, always ZI */
#define VMA_ANON (1 << 4)
/* Private copy of a file VMA, can be ZI */
#define VMA_COW (1 << 5)
/* VMA object type flags */
#define VMOBJ_SHADOW (1 << 6)
/* VMA that's not file-backed, always maps devzero as VMA_COW */
#define VMA_ANONYMOUS (1 << 4)
/* Private copy of a file */
#define VMA_PRIVATE (1 << 5)
/* Copy-on-write semantics */
#define VMA_COW (1 << 6)
/* A vm object that is a shadow of another */
#define VMOBJ_SHADOW (1 << 7)
struct page {
int count; /* Refcount */
@@ -69,6 +69,16 @@ struct vm_pager {
struct vm_pager_ops ops; /* The ops the pager does on area */
};
enum VM_OBJ_TYPE {
VM_OBJ_SHADOW = 1, /* Anonymous pages, swap_pager, no vm_file */
VM_OBJ_VNODE, /* VFS file pages, vnode_pager, has vm_file */
VM_OBJ_DEVICE /* Device pages, device_pager, has vm_file */
};
/* TODO:
* How to distinguish different devices handling page faults ???
*/
/*
* Describes the in-memory representation of a resource. This could
* point at a file or another resource, e.g. a device area, swapper space,
@@ -81,20 +91,19 @@ struct vm_object {
int vma_refcnt; /* Number of vmas that refer */
int shadow_refcnt; /* Number of shadows that refer */
struct list_head shadows; /* List of vm objects that shadow this one */
struct vm_object *orig_vma; /* Original object that this one shadows */
struct vm_object *orig_obj; /* Original object that this one shadows */
unsigned int type; /* Defines the type of the object */
struct list_head list; /* List of all vm objects in memory */
struct list_head page_cache;/* List of in-memory pages */
struct vm_pager *pager; /* The pager for this object */
union private_data { /* Private data about the object */
struct vm_file *file; /* VFS file-specific information */
} priv;
struct list_head page_cache; /* List of in-memory pages */
struct vm_pager *pager; /* The pager for this object */
};
/* In memory representation of a vfs file. */
/* In memory representation of either a vfs file, a device. */
struct vm_file {
unsigned long vnum;
unsigned long length;
struct vm_object vm_obj;
void *priv_data; /* Device pagers use to access device info */
};
/* To create per-vma vm_object lists */