1 #include <linux/slab.h>
2 #include <linux/proc_fs.h>
13 read_buffer(char* page, char** start, off_t off, int count,
16 struct buffer *buffer = (struct buffer *)data;
18 if (off >= buffer->size) {
23 count = min((int) (buffer->size - off), count);
25 memcpy(page, &buffer->data[off], count);
30 #define BOOT_PARAMS_SIZE 1536
31 static char __initdata atags_copy[BOOT_PARAMS_SIZE];
33 void __init save_atags(const struct tag *tags)
35 memcpy(atags_copy, tags, sizeof(atags_copy));
38 static int __init init_atags_procfs(void)
41 * This cannot go into save_atags() because kmalloc and proc don't work
42 * yet when it is called.
44 struct proc_dir_entry *tags_entry;
45 struct tag *tag = (struct tag *)atags_copy;
49 if (tag->hdr.tag != ATAG_CORE) {
50 printk(KERN_INFO "No ATAGs?");
54 for (; tag->hdr.size; tag = tag_next(tag))
57 /* include the terminating ATAG_NONE */
58 size = (char *)tag - atags_copy + sizeof(struct tag_header);
60 WARN_ON(tag->hdr.tag != ATAG_NONE);
62 b = kmalloc(sizeof(*b) + size, GFP_KERNEL);
67 memcpy(b->data, atags_copy, size);
69 tags_entry = create_proc_read_entry("atags", 0400,
70 NULL, read_buffer, b);
79 printk(KERN_ERR "Exporting ATAGs: not enough memory\n");
83 arch_initcall(init_atags_procfs);