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/**
* @file initrd.h
* Initrd image support
* An archive file (made with ar) can be linked into the final executable to
* allow files to be loaded in memory on boot. See mkinitrd.sh or the Makefile
* for more info.
*/
#ifndef INITRD_H_
#define INITRD_H_
#include <stdint.h>
/**
* Structure for the archive's header.
*/
typedef struct
{
char signature[8]; /**< The archive's signature. */
} __attribute__ ((packed)) initrd_header;
/**
* Structure for a file entry in the archive.
*/
typedef struct
{
char name[16]; /**< The name of the file. */
uint8_t unused[32]; /**< Unused information. */
char size[10]; /**< The file's size in bytes (as string). */
char sig[2]; /**< A signature to start file data. */
} __attribute__ ((packed)) initrd_file;
/**
* Confirms the initrd image is loaded and valid.
* @return non-zero if valid image found
*/
uint8_t initrd_validate(void);
/**
* Gets contents of the given file.
* @param name the file's name
* @return pointer to file data, null if not found
*/
char *initrd_getfile(const char *name);
/**
* Gets the size of the given file.
* @param name the file's name
* @return the file's size, in bytes
*/
uint32_t initrd_getfilesize(const char *name);
#endif // INITRD_H_
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