Data Fields
fs_config_t const *	p_config
fs_op_code_t	op_code
union {
struct {
uint32_t const * p_src
uint32_t const * p_dest
uint16_t length_words
uint16_t offset
} store
struct {
uint16_t page
uint16_t pages_erased
uint16_t pages_to_erase
} erase
};