from mips64.h:83
struct mips64_common
{
unsigned int common_magic;
void *arch_info;
struct reg_cache *core_cache;
struct mips_ejtag ejtag_info;
uint64_t core_regs[MIPS64_NUM_REGS];
struct working_area *fast_data_area;
bool bp_scanned;
int num_inst_bpoints;
int num_data_bpoints;
int num_inst_bpoints_avail;
int num_data_bpoints_avail;
struct mips64_comparator *inst_break_list;
struct mips64_comparator *data_break_list;
int (*read_core_reg)(struct target *target, int num);
int (*write_core_reg)(struct target *target, int num);
bool mips64mode32;
};