jffs2 and 32 bit data access problem

[Dach Miroslaw]

Hi All,

I have had some problems mounting jffs2 file system on my NOR Flash (Intel TE28F640) (it is part of Avnet evaluation board with Virtex-4 Xilinx chip). NOR Flash is connected to the bus in a way that I can access data in 1 or 2 bytes mode. When I try to get 4 bytes (ie. an integer value) I get only first two bytes. I went through the jffs2 code in the linux kernel 2.6.23 and it seems to be that some structures have fields which refer to 'int' values:

include/linux/jffs2.h  :

typedef struct {
        uint32_t v32;
} __attribute__((packed)) jint32_t;

struct jffs2_unknown_node
{
        /* All start like this */
        jint16_t magic;
        jint16_t nodetype;
        jint32_t totlen; /* So we can skip over nodes we don't grok */
        jint32_t hdr_crc;
};

Is there some work around (in software) to get 4 bytes (jint32_t type) - one implicit readout of the Flash memory which refers to 2 explicit readouts (of two bytes each) of Flash.

Best Regards

Miroslaw Dach