BIOS replacement flashrom support. More...

#include <arch/types.h>

Functions
int	nvflash_detect (void)
	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 (void)
	Erase the whole flashrom.

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: Megan Potter

Function Documentation

◆ nvflash_detect()

int nvflash_detect ( void )

Try to detect a compatible flashrom.

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

◆ nvflash_erase_all()

int nvflash_erase_all ( void )

Erase the whole flashrom.

Returns: 0 on success, <0 on error.

◆ nvflash_erase_block()

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.

◆ nvflash_write_block()

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

Write data to the flashrom.