blob: bce3719bbb45f15a7ae1418fa195933ea394f992 [file] [log] [blame]
#ifndef __ROMFILE_LOADER_H
#define __ROMFILE_LOADER_H
#include "types.h" // u8
#include "util.h" // romfile_s
#define ROMFILE_LOADER_FILESZ 56
/* ROM file linker/loader interface. Linker uses little endian format */
struct romfile_loader_entry_s {
u32 command;
union {
/*
* COMMAND_ALLOCATE - allocate a table from @alloc.file
* subject to @alloc.align alignment (must be power of 2)
* and @alloc.zone (can be HIGH or FSEG) requirements.
*
* Must appear exactly once for each file, and before
* this file is referenced by any other command.
*/
struct {
char file[ROMFILE_LOADER_FILESZ];
u32 align;
u8 zone;
} alloc;
/*
* COMMAND_ADD_POINTER - patch the table (originating from
* @dest_file) at @pointer.offset, by adding a pointer to the table
* originating from @src_file. 1,2,4 or 8 byte unsigned
* addition is used depending on @pointer.size.
*/
struct {
char dest_file[ROMFILE_LOADER_FILESZ];
char src_file[ROMFILE_LOADER_FILESZ];
u32 offset;
u8 size;
} pointer;
/*
* COMMAND_ADD_CHECKSUM - calculate checksum of the range specified by
* @cksum.start and @cksum.length fields,
* and then add the value at @cksum_offset.
* Checksum simply sums -X for each byte X in the range
* using 8-bit math.
*/
struct {
char file[ROMFILE_LOADER_FILESZ];
u32 offset;
u32 start;
u32 length;
} cksum;
/* padding */
char pad[124];
};
};
enum {
ROMFILE_LOADER_COMMAND_ALLOCATE = 0x1,
ROMFILE_LOADER_COMMAND_ADD_POINTER = 0x2,
ROMFILE_LOADER_COMMAND_ADD_CHECKSUM = 0x3,
};
enum {
ROMFILE_LOADER_ALLOC_ZONE_HIGH = 0x1,
ROMFILE_LOADER_ALLOC_ZONE_FSEG = 0x2,
};
int romfile_loader_execute(const char *name);
#endif