Access to Replay Protected Memory Block (RPMB) in eMMC 4.4 card

[jituelect]

I have a S3C2443 board (which supports eMMC) and a NAND flash chip, compliant with eMMC 4.4.
I am able to perform other operation like boot, read/write, WP, lock/unlock, erase etc.
I am trying to access the RPMB area but always getting the general failure.
(I have not set the key, as it was also giving general failure)

steps I took to access RPMB.

# Set R/W access to RPMB by writing 0x03 to byte 179 in EXT_CSD.
# Create a RPMB frame(512 bytes) for reading counter value.
//writing the read counter request
# Issue CMD23 with reliable write & blk count=1.
# Issue CMD25.

//writing the result register read request
# Create RPMB frame for "result register read".
# Issue CMD23 with blk count=1.
# Issue CMD25.

// reading the register
# Issue CMD23 with blk count=1.
# Issue CMD18.

The structure for RPMB frame, I am using is
// RPMB data
#define RPMB_FRAME_SIZE (512)
#define RPMB_STUFF_SIZE (196)
#define RPMB_KEY_MAC_SIZE (32)
#define RPMB_DATA_SIZE (256)
#define RPMB_NONCE_SIZE (16)
#define RPMB_WCOUNT_SIZE (4)
#define RPMB_ADDR_SIZE (2)
#define RPMB_BCOUNT_SIZE (2)
#define RPMB_RESULT_SIZE (2)
#define RPMB_REQ_RESP_SIZE (2)

typedef struct {
unsigned char stuff[RPMB_STUFF_SIZE];
unsigned char key_mac[RPMB_KEY_MAC_SIZE];
unsigned char data[RPMB_DATA_SIZE];
unsigned char nonce[RPMB_NONCE_SIZE];
unsigned int wcounter;
unsigned short addr;
unsigned short bcount;
unsigned short result;
unsigned short req_resp;
} RPMB_FRAME;
Am I missing something?
Any help is greatly appreciated.

TIA

 

[vpse]

Hello,

I am trying to get the RPMB. I am a beginner though.

Can you please let me know if were successful in doing this ? if so, please post sample code and details on generating the RPMB data frame.

IF you wish, You may personally post it to vpse at yahoo dot com.

Thanks,
Prakash

 

[sidharthrony]

Hello,

I am trying to get the RPMB. I am a beginner though.

Can you please let me know if were successful in doing this ? if so, please post sample code and details on generating the RPMB data frame.

IF you wish, You may personally post it to vpse at yahoo dot com.

Thanks,
Prakash

HI I need some help in programming eMMC. can you please tell me what is this Relative card address?
suppose if have to write to a particular address from one host. and read from another host from the same address. how is it done with RCA?

Thanks
Sidharth