1 #ifndef _GPXE_NVO_H 2 #define _GPXE_NVO_H 3 4 /** @file 5 * 6 * Non-volatile stored options 7 * 8 */ 9 10 FILE_LICENCE ( GPL2_OR_LATER ); 11 12 #include <stdint.h> 13 #include <gpxe/dhcpopts.h> 14 #include <gpxe/settings.h> 15 16 struct nvs_device; 17 struct refcnt; 18 19 /** 20 * A fragment of a non-volatile storage device used for stored options 21 */ 22 struct nvo_fragment { 23 /** Starting address of fragment within NVS device */ 24 unsigned int address; 25 /** Length of fragment */ 26 size_t len; 27 }; 28 29 /** 30 * A block of non-volatile stored options 31 */ 32 struct nvo_block { 33 /** Settings block */ 34 struct settings settings; 35 /** Underlying non-volatile storage device */ 36 struct nvs_device *nvs; 37 /** List of option-containing fragments 38 * 39 * The list is terminated by a fragment with a length of zero. 40 */ 41 struct nvo_fragment *fragments; 42 /** Total length of option-containing fragments */ 43 size_t total_len; 44 /** Option-containing data */ 45 void *data; 46 /** DHCP options block */ 47 struct dhcp_options dhcpopts; 48 }; 49 50 extern void nvo_init ( struct nvo_block *nvo, struct nvs_device *nvs, 51 struct nvo_fragment *fragments, struct refcnt *refcnt ); 52 extern int register_nvo ( struct nvo_block *nvo, struct settings *parent ); 53 extern void unregister_nvo ( struct nvo_block *nvo ); 54 55 #endif /* _GPXE_NVO_H */ 56
