include/hw/loader.h - qemu - Git at Google

 #ifndef LOADER_H
 #define LOADER_H
 #include "hw/nvram/fw_cfg.h"

 /* loader.c */
 /**
  * get_image_size: retrieve size of an image file
  * @filename: Path to the image file
  *
  * Returns the size of the image file on success, -1 otherwise.
  * On error, errno is also set as appropriate.
  */
 int64_t get_image_size(const char *filename);
 /**
  * load_image_size: load an image file into specified buffer
  * @filename: Path to the image file
  * @addr: Buffer to load image into
  * @size: Size of buffer in bytes
  *
  * Load an image file from disk into the specified buffer.
  * If the image is larger than the specified buffer, only
  * @size bytes are read (this is not considered an error).
  *
  * Prefer to use the GLib function g_file_get_contents() rather
  * than a "get_image_size()/g_malloc()/load_image_size()" sequence.
  *
  * Returns the number of bytes read, or -1 on error. On error,
  * errno is also set as appropriate.
  */
 ssize_t load_image_size(const char *filename, void *addr, size_t size);

 /**load_image_targphys_as:
  * @filename: Path to the image file
  * @addr: Address to load the image to
  * @max_sz: The maximum size of the image to load
  * @as: The AddressSpace to load the ELF to. The value of address_space_memory
  *      is used if nothing is supplied here.
  *
  * Load a fixed image into memory.
  *
  * Returns the size of the loaded image on success, -1 otherwise.
  */
 ssize_t load_image_targphys_as(const char *filename,
                                hwaddr addr, uint64_t max_sz, AddressSpace *as);

 /**load_targphys_hex_as:
  * @filename: Path to the .hex file
  * @entry: Store the entry point given by the .hex file
  * @as: The AddressSpace to load the .hex file to. The value of
  *      address_space_memory is used if nothing is supplied here.
  *
  * Load a fixed .hex file into memory.
  *
  * Returns the size of the loaded .hex file on success, -1 otherwise.
  */
 ssize_t load_targphys_hex_as(const char *filename, hwaddr *entry,
                              AddressSpace *as);

 /** load_image_targphys:
  * Same as load_image_targphys_as(), but doesn't allow the caller to specify
  * an AddressSpace.
  */
 ssize_t load_image_targphys(const char *filename, hwaddr,
                             uint64_t max_sz);

 /**
  * load_image_mr: load an image into a memory region
  * @filename: Path to the image file
  * @mr: Memory Region to load into
  *
  * Load the specified file into the memory region.
  * The file loaded is registered as a ROM, so its contents will be
  * reinstated whenever the system is reset.
  * If the file is larger than the memory region's size the call will fail.
  * Returns -1 on failure, or the size of the file.
  */
 ssize_t load_image_mr(const char *filename, MemoryRegion *mr);

 /* This is the limit on the maximum uncompressed image size that
  * load_image_gzipped_buffer() and load_image_gzipped() will read. It prevents
  * g_malloc() in those functions from allocating a huge amount of memory.
  */
 #define LOAD_IMAGE_MAX_GUNZIP_BYTES (256 << 20)

 ssize_t load_image_gzipped_buffer(const char *filename, uint64_t max_sz,
                                   uint8_t **buffer);
 ssize_t load_image_gzipped(const char *filename, hwaddr addr, uint64_t max_sz);

 #define ELF_LOAD_FAILED       -1
 #define ELF_LOAD_NOT_ELF      -2
 #define ELF_LOAD_WRONG_ARCH   -3
 #define ELF_LOAD_WRONG_ENDIAN -4
 #define ELF_LOAD_TOO_BIG      -5
 const char *load_elf_strerror(ssize_t error);

 /** load_elf_ram_sym:
  * @filename: Path of ELF file
  * @elf_note_fn: optional function to parse ELF Note type
  *               passed via @translate_opaque
  * @translate_fn: optional function to translate load addresses
  * @translate_opaque: opaque data passed to @translate_fn
  * @pentry: Populated with program entry point. Ignored if NULL.
  * @lowaddr: Populated with lowest loaded address. Ignored if NULL.
  * @highaddr: Populated with highest loaded address. Ignored if NULL.
  * @pflags: Populated with ELF processor-specific flags. Ignore if NULL.
  * @bigendian: Expected ELF endianness. 0 for LE otherwise BE
  * @elf_machine: Expected ELF machine type
  * @clear_lsb: Set to mask off LSB of addresses (Some architectures use
  *             this for non-address data)
  * @data_swab: Set to order of byte swapping for data. 0 for no swap, 1
  *             for swapping bytes within halfwords, 2 for bytes within
  *             words and 3 for within doublewords.
  * @as: The AddressSpace to load the ELF to. The value of address_space_memory
  *      is used if nothing is supplied here.
  * @load_rom : Load ELF binary as ROM
  * @sym_cb: Callback function for symbol table entries
  *
  * Load an ELF file's contents to the emulated system's address space.
  * Clients may optionally specify a callback to perform address
  * translations. @pentry, @lowaddr and @highaddr are optional pointers
  * which will be populated with various load information. @bigendian and
  * @elf_machine give the expected endianness and machine for the ELF the
  * load will fail if the target ELF does not match. Some architectures
  * have some architecture-specific behaviours that come into effect when
  * their particular values for @elf_machine are set.
  * If @elf_machine is EM_NONE then the machine type will be read from the
  * ELF header and no checks will be carried out against the machine type.
  */
 typedef void (*symbol_fn_t)(const char *st_name, int st_info,
                             uint64_t st_value, uint64_t st_size);

 ssize_t load_elf_ram_sym(const char *filename,
                          uint64_t (*elf_note_fn)(void *, void *, bool),
                          uint64_t (*translate_fn)(void *, uint64_t),
                          void *translate_opaque, uint64_t *pentry,
                          uint64_t *lowaddr, uint64_t *highaddr,
                          uint32_t *pflags, int big_endian, int elf_machine,
                          int clear_lsb, int data_swab,
                          AddressSpace *as, bool load_rom, symbol_fn_t sym_cb);

 /** load_elf_ram:
  * Same as load_elf_ram_sym(), but doesn't allow the caller to specify a
  * symbol callback function
  */
 ssize_t load_elf_ram(const char *filename,
                      uint64_t (*elf_note_fn)(void *, void *, bool),
                      uint64_t (*translate_fn)(void *, uint64_t),
                      void *translate_opaque, uint64_t *pentry,
                      uint64_t *lowaddr, uint64_t *highaddr, uint32_t *pflags,
                      int big_endian, int elf_machine, int clear_lsb,
                      int data_swab, AddressSpace *as, bool load_rom);

 /** load_elf_as:
  * Same as load_elf_ram(), but always loads the elf as ROM
  */
 ssize_t load_elf_as(const char *filename,
                     uint64_t (*elf_note_fn)(void *, void *, bool),
                     uint64_t (*translate_fn)(void *, uint64_t),
                     void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
                     uint64_t *highaddr, uint32_t *pflags, int big_endian,
                     int elf_machine, int clear_lsb, int data_swab,
                     AddressSpace *as);

 /** load_elf:
  * Same as load_elf_as(), but doesn't allow the caller to specify an
  * AddressSpace.
  */
 ssize_t load_elf(const char *filename,
                  uint64_t (*elf_note_fn)(void *, void *, bool),
                  uint64_t (*translate_fn)(void *, uint64_t),
                  void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
                  uint64_t *highaddr, uint32_t *pflags, int big_endian,
                  int elf_machine, int clear_lsb, int data_swab);

 /** load_elf_hdr:
  * @filename: Path of ELF file
  * @hdr: Buffer to populate with header data. Header data will not be
  * filled if set to NULL.
  * @is64: Set to true if the ELF is 64bit. Ignored if set to NULL
  * @errp: Populated with an error in failure cases
  *
  * Inspect an ELF file's header. Read its full header contents into a
  * buffer and/or determine if the ELF is 64bit.
  */
 void load_elf_hdr(const char *filename, void *hdr, bool *is64, Error **errp);

 ssize_t load_aout(const char *filename, hwaddr addr, int max_sz,
                   int bswap_needed, hwaddr target_page_size);

 #define LOAD_UIMAGE_LOADADDR_INVALID (-1)

 /** load_uimage_as:
  * @filename: Path of uimage file
  * @ep: Populated with program entry point. Ignored if NULL.
  * @loadaddr: load address if none specified in the image or when loading a
  *            ramdisk. Populated with the load address. Ignored if NULL or
  *            LOAD_UIMAGE_LOADADDR_INVALID (images which do not specify a load
  *            address will not be loadable).
  * @is_linux: Is set to true if the image loaded is Linux. Ignored if NULL.
  * @translate_fn: optional function to translate load addresses
  * @translate_opaque: opaque data passed to @translate_fn
  * @as: The AddressSpace to load the ELF to. The value of address_space_memory
  *      is used if nothing is supplied here.
  *
  * Loads a u-boot image into memory.
  *
  * Returns the size of the loaded image on success, -1 otherwise.
  */
 ssize_t load_uimage_as(const char *filename, hwaddr *ep,
                        hwaddr *loadaddr, int *is_linux,
                        uint64_t (*translate_fn)(void *, uint64_t),
                        void *translate_opaque, AddressSpace *as);

 /** load_uimage:
  * Same as load_uimage_as(), but doesn't allow the caller to specify an
  * AddressSpace.
  */
 ssize_t load_uimage(const char *filename, hwaddr *ep,
                     hwaddr *loadaddr, int *is_linux,
                     uint64_t (*translate_fn)(void *, uint64_t),
                     void *translate_opaque);

 /**
  * load_ramdisk_as:
  * @filename: Path to the ramdisk image
  * @addr: Memory address to load the ramdisk to
  * @max_sz: Maximum allowed ramdisk size (for non-u-boot ramdisks)
  * @as: The AddressSpace to load the ELF to. The value of address_space_memory
  *      is used if nothing is supplied here.
  *
  * Load a ramdisk image with U-Boot header to the specified memory
  * address.
  *
  * Returns the size of the loaded image on success, -1 otherwise.
  */
 ssize_t load_ramdisk_as(const char *filename, hwaddr addr, uint64_t max_sz,
                         AddressSpace *as);

 /**
  * load_ramdisk:
  * Same as load_ramdisk_as(), but doesn't allow the caller to specify
  * an AddressSpace.
  */
 ssize_t load_ramdisk(const char *filename, hwaddr addr, uint64_t max_sz);

 ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src, size_t srclen);

 ssize_t read_targphys(const char *name,
                       int fd, hwaddr dst_addr, size_t nbytes);
 void pstrcpy_targphys(const char *name,
                       hwaddr dest, int buf_size,
                       const char *source);

 ssize_t rom_add_file(const char *file, const char *fw_dir,
                      hwaddr addr, int32_t bootindex,
                      bool option_rom, MemoryRegion *mr, AddressSpace *as);
 MemoryRegion *rom_add_blob(const char *name, const void *blob, size_t len,
                            size_t max_len, hwaddr addr,
                            const char *fw_file_name,
                            FWCfgCallback fw_callback,
                            void *callback_opaque, AddressSpace *as,
                            bool read_only);
 int rom_add_elf_program(const char *name, GMappedFile *mapped_file, void *data,
                         size_t datasize, size_t romsize, hwaddr addr,
                         AddressSpace *as);
 int rom_check_and_register_reset(void);
 void rom_set_fw(FWCfgState *f);
 void rom_set_order_override(int order);
 void rom_reset_order_override(void);

 /**
  * rom_transaction_begin:
  *
  * Call this before of a series of rom_add_*() calls.  Call
  * rom_transaction_end() afterwards to commit or abort.  These functions are
  * useful for undoing a series of rom_add_*() calls if image file loading fails
  * partway through.
  */
 void rom_transaction_begin(void);

 /**
  * rom_transaction_end:
  * @commit: true to commit added roms, false to drop added roms
  *
  * Call this after a series of rom_add_*() calls.  See rom_transaction_begin().
  */
 void rom_transaction_end(bool commit);

 int rom_copy(uint8_t *dest, hwaddr addr, size_t size);
 void *rom_ptr(hwaddr addr, size_t size);
 /**
  * rom_ptr_for_as: Return a pointer to ROM blob data for the address
  * @as: AddressSpace to look for the ROM blob in
  * @addr: Address within @as
  * @size: size of data required in bytes
  *
  * Returns: pointer into the data which backs the matching ROM blob,
  * or NULL if no blob covers the address range.
  *
  * This function looks for a ROM blob which covers the specified range
  * of bytes of length @size starting at @addr within the address space
  * @as. This is useful for code which runs as part of board
  * initialization or CPU reset which wants to read data that is part
  * of a user-supplied guest image or other guest memory contents, but
  * which runs before the ROM loader's reset function has copied the
  * blobs into guest memory.
  *
  * rom_ptr_for_as() will look not just for blobs loaded directly to
  * the specified address, but also for blobs which were loaded to an
  * alias of the region at a different location in the AddressSpace.
  * In other words, if a machine model has RAM at address 0x0000_0000
  * which is aliased to also appear at 0x1000_0000, rom_ptr_for_as()
  * will return the correct data whether the guest image was linked and
  * loaded at 0x0000_0000 or 0x1000_0000.  Contrast rom_ptr(), which
  * will only return data if the image load address is an exact match
  * with the queried address.
  *
  * New code should prefer to use rom_ptr_for_as() instead of
  * rom_ptr().
  */
 void *rom_ptr_for_as(AddressSpace *as, hwaddr addr, size_t size);
 void hmp_info_roms(Monitor *mon, const QDict *qdict);

 #define rom_add_file_fixed(_f, _a, _i)          \
     rom_add_file(_f, NULL, _a, _i, false, NULL, NULL)
 #define rom_add_blob_fixed(_f, _b, _l, _a)      \
     rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, NULL, true)
 #define rom_add_file_mr(_f, _mr, _i)            \
     rom_add_file(_f, NULL, 0, _i, false, _mr, NULL)
 #define rom_add_file_as(_f, _as, _i)            \
     rom_add_file(_f, NULL, 0, _i, false, NULL, _as)
 #define rom_add_file_fixed_as(_f, _a, _i, _as)          \
     rom_add_file(_f, NULL, _a, _i, false, NULL, _as)
 #define rom_add_blob_fixed_as(_f, _b, _l, _a, _as)      \
     rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, _as, true)

 ssize_t rom_add_vga(const char *file);
 ssize_t rom_add_option(const char *file, int32_t bootindex);

 /* This is the usual maximum in uboot, so if a uImage overflows this, it would
  * overflow on real hardware too. */
 #define UBOOT_MAX_GUNZIP_BYTES (64 << 20)

 typedef struct RomGap {
     hwaddr base;
     size_t size;
 } RomGap;

 /**
  * rom_find_largest_gap_between: return largest gap between ROMs in given range
  *
  * Given a range of addresses, this function finds the largest
  * contiguous subrange which has no ROMs loaded to it. That is,
  * it finds the biggest gap which is free for use for other things.
  */
 RomGap rom_find_largest_gap_between(hwaddr base, size_t size);

 #endif
	#ifndef LOADER_H
	#define LOADER_H
	#include "hw/nvram/fw_cfg.h"

	/* loader.c */
	/**
	* get_image_size: retrieve size of an image file
	* @filename: Path to the image file
	*
	* Returns the size of the image file on success, -1 otherwise.
	* On error, errno is also set as appropriate.
	*/
	int64_t get_image_size(const char *filename);
	/**
	* load_image_size: load an image file into specified buffer
	* @filename: Path to the image file
	* @addr: Buffer to load image into
	* @size: Size of buffer in bytes
	*
	* Load an image file from disk into the specified buffer.
	* If the image is larger than the specified buffer, only
	* @size bytes are read (this is not considered an error).
	*
	* Prefer to use the GLib function g_file_get_contents() rather
	* than a "get_image_size()/g_malloc()/load_image_size()" sequence.
	*
	* Returns the number of bytes read, or -1 on error. On error,
	* errno is also set as appropriate.
	*/
	ssize_t load_image_size(const char filename, void addr, size_t size);

	/**load_image_targphys_as:
	* @filename: Path to the image file
	* @addr: Address to load the image to
	* @max_sz: The maximum size of the image to load
	* @as: The AddressSpace to load the ELF to. The value of address_space_memory
	* is used if nothing is supplied here.
	*
	* Load a fixed image into memory.
	*
	* Returns the size of the loaded image on success, -1 otherwise.
	*/
	ssize_t load_image_targphys_as(const char *filename,
	hwaddr addr, uint64_t max_sz, AddressSpace *as);

	/**load_targphys_hex_as:
	* @filename: Path to the .hex file
	* @entry: Store the entry point given by the .hex file
	* @as: The AddressSpace to load the .hex file to. The value of
	* address_space_memory is used if nothing is supplied here.
	*
	* Load a fixed .hex file into memory.
	*
	* Returns the size of the loaded .hex file on success, -1 otherwise.
	*/
	ssize_t load_targphys_hex_as(const char filename, hwaddr entry,
	AddressSpace *as);

	/** load_image_targphys:
	* Same as load_image_targphys_as(), but doesn't allow the caller to specify
	* an AddressSpace.
	*/
	ssize_t load_image_targphys(const char *filename, hwaddr,
	uint64_t max_sz);

	/**
	* load_image_mr: load an image into a memory region
	* @filename: Path to the image file
	* @mr: Memory Region to load into
	*
	* Load the specified file into the memory region.
	* The file loaded is registered as a ROM, so its contents will be
	* reinstated whenever the system is reset.
	* If the file is larger than the memory region's size the call will fail.
	* Returns -1 on failure, or the size of the file.
	*/
	ssize_t load_image_mr(const char filename, MemoryRegion mr);

	/* This is the limit on the maximum uncompressed image size that
	* load_image_gzipped_buffer() and load_image_gzipped() will read. It prevents
	* g_malloc() in those functions from allocating a huge amount of memory.
	*/
	#define LOAD_IMAGE_MAX_GUNZIP_BYTES (256 << 20)

	ssize_t load_image_gzipped_buffer(const char *filename, uint64_t max_sz,
	uint8_t **buffer);
	ssize_t load_image_gzipped(const char *filename, hwaddr addr, uint64_t max_sz);

	#define ELF_LOAD_FAILED -1
	#define ELF_LOAD_NOT_ELF -2
	#define ELF_LOAD_WRONG_ARCH -3
	#define ELF_LOAD_WRONG_ENDIAN -4
	#define ELF_LOAD_TOO_BIG -5
	const char *load_elf_strerror(ssize_t error);

	/** load_elf_ram_sym:
	* @filename: Path of ELF file
	* @elf_note_fn: optional function to parse ELF Note type
	* passed via @translate_opaque
	* @translate_fn: optional function to translate load addresses
	* @translate_opaque: opaque data passed to @translate_fn
	* @pentry: Populated with program entry point. Ignored if NULL.
	* @lowaddr: Populated with lowest loaded address. Ignored if NULL.
	* @highaddr: Populated with highest loaded address. Ignored if NULL.
	* @pflags: Populated with ELF processor-specific flags. Ignore if NULL.
	* @bigendian: Expected ELF endianness. 0 for LE otherwise BE
	* @elf_machine: Expected ELF machine type
	* @clear_lsb: Set to mask off LSB of addresses (Some architectures use
	* this for non-address data)
	* @data_swab: Set to order of byte swapping for data. 0 for no swap, 1
	* for swapping bytes within halfwords, 2 for bytes within
	* words and 3 for within doublewords.
	* @as: The AddressSpace to load the ELF to. The value of address_space_memory
	* is used if nothing is supplied here.
	* @load_rom : Load ELF binary as ROM
	* @sym_cb: Callback function for symbol table entries
	*
	* Load an ELF file's contents to the emulated system's address space.
	* Clients may optionally specify a callback to perform address
	* translations. @pentry, @lowaddr and @highaddr are optional pointers
	* which will be populated with various load information. @bigendian and
	* @elf_machine give the expected endianness and machine for the ELF the
	* load will fail if the target ELF does not match. Some architectures
	* have some architecture-specific behaviours that come into effect when
	* their particular values for @elf_machine are set.
	* If @elf_machine is EM_NONE then the machine type will be read from the
	* ELF header and no checks will be carried out against the machine type.
	*/
	typedef void (symbol_fn_t)(const char st_name, int st_info,
	uint64_t st_value, uint64_t st_size);

	ssize_t load_elf_ram_sym(const char *filename,
	uint64_t (elf_note_fn)(void , void *, bool),
	uint64_t (translate_fn)(void , uint64_t),
	void translate_opaque, uint64_t pentry,
	uint64_t lowaddr, uint64_t highaddr,
	uint32_t *pflags, int big_endian, int elf_machine,
	int clear_lsb, int data_swab,
	AddressSpace *as, bool load_rom, symbol_fn_t sym_cb);

	/** load_elf_ram:
	* Same as load_elf_ram_sym(), but doesn't allow the caller to specify a
	* symbol callback function
	*/
	ssize_t load_elf_ram(const char *filename,
	uint64_t (elf_note_fn)(void , void *, bool),
	uint64_t (translate_fn)(void , uint64_t),
	void translate_opaque, uint64_t pentry,
	uint64_t lowaddr, uint64_t highaddr, uint32_t *pflags,
	int big_endian, int elf_machine, int clear_lsb,
	int data_swab, AddressSpace *as, bool load_rom);

	/** load_elf_as:
	* Same as load_elf_ram(), but always loads the elf as ROM
	*/
	ssize_t load_elf_as(const char *filename,
	uint64_t (elf_note_fn)(void , void *, bool),
	uint64_t (translate_fn)(void , uint64_t),
	void translate_opaque, uint64_t pentry, uint64_t *lowaddr,
	uint64_t highaddr, uint32_t pflags, int big_endian,
	int elf_machine, int clear_lsb, int data_swab,
	AddressSpace *as);

	/** load_elf:
	* Same as load_elf_as(), but doesn't allow the caller to specify an
	* AddressSpace.
	*/
	ssize_t load_elf(const char *filename,
	uint64_t (elf_note_fn)(void , void *, bool),
	uint64_t (translate_fn)(void , uint64_t),
	void translate_opaque, uint64_t pentry, uint64_t *lowaddr,
	uint64_t highaddr, uint32_t pflags, int big_endian,
	int elf_machine, int clear_lsb, int data_swab);

	/** load_elf_hdr:
	* @filename: Path of ELF file
	* @hdr: Buffer to populate with header data. Header data will not be
	* filled if set to NULL.
	* @is64: Set to true if the ELF is 64bit. Ignored if set to NULL
	* @errp: Populated with an error in failure cases
	*
	* Inspect an ELF file's header. Read its full header contents into a
	* buffer and/or determine if the ELF is 64bit.
	*/
	void load_elf_hdr(const char filename, void hdr, bool is64, Error *errp);

	ssize_t load_aout(const char *filename, hwaddr addr, int max_sz,
	int bswap_needed, hwaddr target_page_size);

	#define LOAD_UIMAGE_LOADADDR_INVALID (-1)

	/** load_uimage_as:
	* @filename: Path of uimage file
	* @ep: Populated with program entry point. Ignored if NULL.
	* @loadaddr: load address if none specified in the image or when loading a
	* ramdisk. Populated with the load address. Ignored if NULL or
	* LOAD_UIMAGE_LOADADDR_INVALID (images which do not specify a load
	* address will not be loadable).
	* @is_linux: Is set to true if the image loaded is Linux. Ignored if NULL.
	* @translate_fn: optional function to translate load addresses
	* @translate_opaque: opaque data passed to @translate_fn
	* @as: The AddressSpace to load the ELF to. The value of address_space_memory
	* is used if nothing is supplied here.
	*
	* Loads a u-boot image into memory.
	*
	* Returns the size of the loaded image on success, -1 otherwise.
	*/
	ssize_t load_uimage_as(const char filename, hwaddr ep,
	hwaddr loadaddr, int is_linux,
	uint64_t (translate_fn)(void , uint64_t),
	void translate_opaque, AddressSpace as);

	/** load_uimage:
	* Same as load_uimage_as(), but doesn't allow the caller to specify an
	* AddressSpace.
	*/
	ssize_t load_uimage(const char filename, hwaddr ep,
	hwaddr loadaddr, int is_linux,
	uint64_t (translate_fn)(void , uint64_t),
	void *translate_opaque);

	/**
	* load_ramdisk_as:
	* @filename: Path to the ramdisk image
	* @addr: Memory address to load the ramdisk to
	* @max_sz: Maximum allowed ramdisk size (for non-u-boot ramdisks)
	* @as: The AddressSpace to load the ELF to. The value of address_space_memory
	* is used if nothing is supplied here.
	*
	* Load a ramdisk image with U-Boot header to the specified memory
	* address.
	*
	* Returns the size of the loaded image on success, -1 otherwise.
	*/
	ssize_t load_ramdisk_as(const char *filename, hwaddr addr, uint64_t max_sz,
	AddressSpace *as);

	/**
	* load_ramdisk:
	* Same as load_ramdisk_as(), but doesn't allow the caller to specify
	* an AddressSpace.
	*/
	ssize_t load_ramdisk(const char *filename, hwaddr addr, uint64_t max_sz);

	ssize_t gunzip(void dst, size_t dstlen, uint8_t src, size_t srclen);

	ssize_t read_targphys(const char *name,
	int fd, hwaddr dst_addr, size_t nbytes);
	void pstrcpy_targphys(const char *name,
	hwaddr dest, int buf_size,
	const char *source);

	ssize_t rom_add_file(const char file, const char fw_dir,
	hwaddr addr, int32_t bootindex,
	bool option_rom, MemoryRegion mr, AddressSpace as);
	MemoryRegion rom_add_blob(const char name, const void *blob, size_t len,
	size_t max_len, hwaddr addr,
	const char *fw_file_name,
	FWCfgCallback fw_callback,
	void callback_opaque, AddressSpace as,
	bool read_only);
	int rom_add_elf_program(const char name, GMappedFile mapped_file, void *data,
	size_t datasize, size_t romsize, hwaddr addr,
	AddressSpace *as);
	int rom_check_and_register_reset(void);
	void rom_set_fw(FWCfgState *f);
	void rom_set_order_override(int order);
	void rom_reset_order_override(void);

	/**
	* rom_transaction_begin:
	*
	* Call this before of a series of rom_add_*() calls. Call
	* rom_transaction_end() afterwards to commit or abort. These functions are
	* useful for undoing a series of rom_add_*() calls if image file loading fails
	* partway through.
	*/
	void rom_transaction_begin(void);

	/**
	* rom_transaction_end:
	* @commit: true to commit added roms, false to drop added roms
	*
	* Call this after a series of rom_add_*() calls. See rom_transaction_begin().
	*/
	void rom_transaction_end(bool commit);

	int rom_copy(uint8_t *dest, hwaddr addr, size_t size);
	void *rom_ptr(hwaddr addr, size_t size);
	/**
	* rom_ptr_for_as: Return a pointer to ROM blob data for the address
	* @as: AddressSpace to look for the ROM blob in
	* @addr: Address within @as
	* @size: size of data required in bytes
	*
	* Returns: pointer into the data which backs the matching ROM blob,
	* or NULL if no blob covers the address range.
	*
	* This function looks for a ROM blob which covers the specified range
	* of bytes of length @size starting at @addr within the address space
	* @as. This is useful for code which runs as part of board
	* initialization or CPU reset which wants to read data that is part
	* of a user-supplied guest image or other guest memory contents, but
	* which runs before the ROM loader's reset function has copied the
	* blobs into guest memory.
	*
	* rom_ptr_for_as() will look not just for blobs loaded directly to
	* the specified address, but also for blobs which were loaded to an
	* alias of the region at a different location in the AddressSpace.
	* In other words, if a machine model has RAM at address 0x0000_0000
	* which is aliased to also appear at 0x1000_0000, rom_ptr_for_as()
	* will return the correct data whether the guest image was linked and
	* loaded at 0x0000_0000 or 0x1000_0000. Contrast rom_ptr(), which
	* will only return data if the image load address is an exact match
	* with the queried address.
	*
	* New code should prefer to use rom_ptr_for_as() instead of
	* rom_ptr().
	*/
	void rom_ptr_for_as(AddressSpace as, hwaddr addr, size_t size);
	void hmp_info_roms(Monitor mon, const QDict qdict);

	#define rom_add_file_fixed(_f, _a, _i) \
	rom_add_file(_f, NULL, _a, _i, false, NULL, NULL)
	#define rom_add_blob_fixed(_f, _b, _l, _a) \
	rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, NULL, true)
	#define rom_add_file_mr(_f, _mr, _i) \
	rom_add_file(_f, NULL, 0, _i, false, _mr, NULL)
	#define rom_add_file_as(_f, _as, _i) \
	rom_add_file(_f, NULL, 0, _i, false, NULL, _as)
	#define rom_add_file_fixed_as(_f, _a, _i, _as) \
	rom_add_file(_f, NULL, _a, _i, false, NULL, _as)
	#define rom_add_blob_fixed_as(_f, _b, _l, _a, _as) \
	rom_add_blob(_f, _b, _l, _l, _a, NULL, NULL, NULL, _as, true)

	ssize_t rom_add_vga(const char *file);
	ssize_t rom_add_option(const char *file, int32_t bootindex);

	/* This is the usual maximum in uboot, so if a uImage overflows this, it would
	* overflow on real hardware too. */
	#define UBOOT_MAX_GUNZIP_BYTES (64 << 20)

	typedef struct RomGap {
	hwaddr base;
	size_t size;
	} RomGap;

	/**
	* rom_find_largest_gap_between: return largest gap between ROMs in given range
	*
	* Given a range of addresses, this function finds the largest
	* contiguous subrange which has no ROMs loaded to it. That is,
	* it finds the biggest gap which is free for use for other things.
	*/
	RomGap rom_find_largest_gap_between(hwaddr base, size_t size);

	#endif