+struct nvram_accessor {
+ u8 (*read)(u8 reg);
+ void (*write)(u8 val, u8 reg);
+};
+
+extern u8 *mem_accessor_base;
+extern struct nvram_accessor *use_nvram, *use_mem;
+
+struct cb_cmos_option_table *get_system_option_table(void);
+int options_checksum_valid(const struct nvram_accessor *nvram);
+void fix_options_checksum_with(const struct nvram_accessor *nvram);
+void fix_options_checksum(void);
+struct cb_cmos_entries *first_cmos_entry(struct cb_cmos_option_table *option_table);
+struct cb_cmos_entries *next_cmos_entry(struct cb_cmos_entries *cur);
+int get_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *dest, char *name);
+int get_option_from(struct cb_cmos_option_table *option_table, void *dest, char *name);