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/*
* Creation Date: <1999/10/16 20:04:37 samuel>
* Time-stamp: <1999/10/16 20:07:49 samuel>
*
* <proc.c>
*
* /proc/mol/ interface
*
* Copyright (C) 1999 Samuel Rydh (samuel@ibrium.se)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation
*
*/
/* THIS FILE IS CURRENTLY UNUSED */
static void build_mol_proc_entry( void );
static void destroy_mol_proc_entry();
static int property_read_proc(char *, char **, off_t, int, int *, void *);
static struct proc_dir_entry *mol_dir_entry=0;
static int
property_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
ulong num = 0x12345678;
int n;
if (off >= 4) {
*eof = 1;
return 0;
}
n = 4 - off;
if (n > count)
n = count;
else
*eof = 1;
memcpy(page, (char*)&num + off, n);
*start = page;
return n;
}
static int
mmap_page(struct file * file, struct vm_area_struct * vma)
{
#if 0
unsigned long offset = vma->vm_offset;
if (offset & ~PAGE_MASK)
return -ENXIO;
#endif
vma->vm_flags = VM_IO | VM_SHM;
if( remap_page_range(vma->vm_start, virt_to_phys(kvars) /*offset*/,
vma->vm_end-vma->vm_start,
vma->vm_page_prot))
return -EAGAIN;
return 0;
}
static struct file_operations page_fops = {
NULL, /* lseek */
NULL, /* read */
NULL, /* write */
NULL, /* mem_readdir */
NULL, /* mem_poll */
NULL, /* mem_ioctl */
mmap_page,
NULL, /* no special open code */
NULL, /* flush */
NULL, /* no special release code */
NULL /* fsync */
};
static struct inode_operations page_inode_ops = {
&page_fops, /* default base directory file-ops */
NULL, /* create */
NULL, /* lookup */
NULL, /* link */
NULL, /* unlink */
NULL, /* symlink */
NULL, /* mkdir */
NULL, /* rmdir */
NULL, /* mknod */
NULL, /* rename */
NULL, /* readlink */
NULL, /* follow_link */
NULL, /* readpage */
NULL, /* writepage */
NULL, /* bmap */
NULL, /* truncate */
NULL, /* permission */
};
static void
build_mol_proc_entry( void )
{
struct proc_dir_entry *ent;
mol_dir_entry = create_proc_entry("mol", S_IFDIR, 0);
if( mol_dir_entry == 0 )
return;
ent = kmalloc(sizeof(struct proc_dir_entry), GFP_KERNEL);
if( ent == NULL )
return;
memset(ent, 0, sizeof(struct proc_dir_entry));
ent->name = "testing";
ent->namelen = strlen("testing");
ent->mode = S_IFREG | S_IRUGO;
ent->nlink = 1;
ent->data = NULL;
ent->read_proc = property_read_proc;
ent->size = 4;
proc_register( mol_dir_entry, ent);
/* B */
ent = kmalloc(sizeof(struct proc_dir_entry), GFP_KERNEL);
if( ent == NULL )
return;
memset(ent, 0, sizeof(struct proc_dir_entry));
ent->name = "page";
ent->namelen = strlen("page");
ent->mode = S_IFREG | S_IRUGO;
ent->nlink = 1;
ent->data = NULL;
ent->read_proc = property_read_proc;
ent->ops = &page_inode_ops;
proc_register( mol_dir_entry, ent);
}
static void
destroy_mol_proc_entry( void )
{
remove_proc_entry( "mol/testing", 0 );
remove_proc_entry( "mol/page", 0 );
remove_proc_entry( "mol", 0 );
}
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