flash.h File Reference

BIOS replacement flashrom support. More...

#include <arch/types.h>

Go to the source code of this file.

Functions
int	nvflash_detect ()
	Try to detect a compatible flashrom.
int	nvflash_erase_block (uint32 addr)
	Erase a single block of flashrom.
int	nvflash_write_block (uint32 addr, void *data, uint32 len)
	Write data to the flashrom.
int	nvflash_erase_all ()
	Erase the whole flashrom.

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Detailed Description

BIOS replacement flashrom support.

This file is involved with accessing an flashrom chip soldered in place to replace the BIOS ROM. Specifically, this driver is for accessing a STMicro M29W800B, but should also work with other chips like the M29W160B or equivalent AMD chips.

Author:

Dan Potter

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Function Documentation

int nvflash_detect

(

)

Try to detect a compatible flashrom.

Returns:

0 if a compatible flashrom is detected, <0 if the normal Dreamcast BIOS is detected.

int nvflash_erase_all

(

)

Erase the whole flashrom.

Returns:

0 on success, <0 on error.

int nvflash_erase_block

(

uint32

addr

)

Erase a single block of flashrom.

Parameters:

addr	The block of the flashrom to erase.

Returns:

0 on success, <0 on error.

int nvflash_write_block	(	uint32	addr,
		void *	data,
		uint32	len
	)

Write data to the flashrom.

Parameters:

addr	The block of the flashrom to write to.
data	The data to write.
len	The length of the data, in bytes.

Returns:

0 on success, <0 on error.