src/include/gpxe/features.h

   1 #ifndef _GPXE_FEATURES_H
   2 #define _GPXE_FEATURES_H
   3
   4 #include <stdint.h>
   5 #include <gpxe/tables.h>
   6 #include <gpxe/dhcp.h>
   7
   8 /** @file
   9  *
  10  * Feature list
  11  *
  12  */
  13
  14 /**
  15  * @defgroup dhcpfeatures DHCP feature option tags
  16  *
  17  * DHCP feature option tags are Etherboot encapsulated options in the
  18  * range 0x10-0x7f.
  19  *
  20  * @{
  21  */
  22
  23 /** PXE API extensions */
  24 #define DHCP_EB_FEATURE_PXE_EXT 0x10
  25
  26 /** iSCSI */
  27 #define DHCP_EB_FEATURE_ISCSI 0x11
  28
  29 /** AoE */
  30 #define DHCP_EB_FEATURE_AOE 0x12
  31
  32 /** @} */
  33
  34 /** Declare a feature code for DHCP */
  35 #define __dhcp_feature __table ( uint8_t, dhcp_features, 01 )
  36
  37 /** Construct a DHCP feature table entry */
  38 #define DHCP_FEATURE( feature_opt ) \
  39         _DHCP_FEATURE ( OBJECT, feature_opt )
  40 #define _DHCP_FEATURE( _name, feature_opt ) \
  41         __DHCP_FEATURE ( _name, feature_opt )
  42 #define __DHCP_FEATURE( _name, feature_opt )                    \
  43         uint8_t __dhcp_feature_ ## _name [] __dhcp_feature = {  \
  44                 feature_opt, DHCP_BYTE ( 1 )                    \
  45         };
  46
  47 /** Declare a named feature */
  48 #define __feature_name __table ( char *, features, 01 )
  49
  50 /** Construct a named feature */
  51 #define FEATURE_NAME( text ) \
  52         _FEATURE_NAME ( OBJECT, text )
  53 #define _FEATURE_NAME( _name, text ) \
  54         __FEATURE_NAME ( _name, text )
  55 #define __FEATURE_NAME( _name, text )                           \
  56         char * __feature_ ## _name __feature_name = text;
  57
  58 /** Declare a feature */
  59 #define FEATURE( text, feature_opt )                            \
  60         FEATURE_NAME ( text );                                  \
  61         DHCP_FEATURE ( feature_opt );
  62
  63 #endif /* _GPXE_FEATURES_H */