linux ÖеÄstruct resource
linux¶Ô¹Ò½ÓÔÚ4G×ÜÏß¿Õ¼äÉϵÄÉ豸ʵÌåµÄ¹ÜÀí·½Ê½ -- struct resource /usr/src/linux-2.6.21.5/include/linux/ioport.h struct resource { resource_size_t start; resource_size_t end; const char *name; unsigned long flags; struct resource *parent, *sibling, *child; }; struct resource_list { struct resource_list *next; struct resource *res; struct pci_dev *dev; }; Ò»¸ö¶ÀÁ¢µÄ¹Ò½ÓÔÚcpu×ÜÏßÉϵÄÉ豸µ¥Ôª,Ò»°ã¶¼ÐèÒªÒ»¶ÎÏßÐԵĵØÖ·¿Õ¼äÀ´ÃèÊöÉ豸×ÔÉí,linuxÊÇÔõô¹ÜÀíËùÓеÄÕâЩÍⲿ"ÎïÀíµØÖ··¶Î§¶Î",½ø¶ø¸øÓû§ºÍlinux×ÔÉíÒ»¸ö±È½ÏºÃµÄ¹Û²ì4G×ÜÏßÉϹҽӵÄÒ»¸ö¸öÉ豸ʵÌåµÄ¼ò½à¡¢Í³Ò»¼¶ÁªÊÓͼµÄÄØ? linux²ÉÓÃstruct resource½á¹¹ÌåÀ´ÃèÊöÒ»¸ö¹Ò½ÓÔÚcpu×ÜÏßÉϵÄÉ豸ʵÌå(32λcpuµÄ×ÜÏßµØÖ··¶Î§ÊÇ0~4G): resource->startÃèÊöÉ豸ʵÌåÔÚcpu×ÜÏßÉϵÄÏßÐÔÆðʼÎïÀíµØÖ·; resource->end -ÃèÊöÉ豸ʵÌåÔÚcpu×ÜÏßÉϵÄÏßÐÔ½áβÎïÀíµØÖ·; resource->name ÃèÊöÕâ¸öÉ豸ʵÌåµÄÃû³Æ,Õâ¸öÃû×Ö¿ª·¢ÈËÔ±¿ÉÒÔËæÒâÆð,µ«×îºÃÌùÇÐ; resource->flag ÃèÊöÕâ¸öÉ豸ʵÌåµÄһЩ¹²ÐÔºÍÌØÐԵıê־λ; Ö»ÐèÒªÁ˽âÒ»¸öÉ豸ʵÌåµÄÒÔÉÏ4Ïî,linux¾ÍÄܹ»ÖªÏþÕâ¸ö¹Ò½ÓÔÚcpu×ÜÏßµÄÉϵÄÉ豸ʵÌåµÄ»ù±¾Ê¹ÓÃÇé¿ö,Ò²¾ÍÊÇ[resource->start, resource->end]Õâ¶ÎÎïÀíµØÖ·ÏÖÔÚÊÇ¿ÕÏÐ×ÅÄØ,»¹ÊDZ»Ê²Ã´É豸ռÓÃ×ÅÄØ? linux»á¼á¾ö±ÜÃ⽫һ¸öÒѾ±»Ò»¸öÉ豸ʵÌåʹÓõÄ×ÜÏßÎïÀíµØÖ·Çø¼ä¶Î[resource->start, resource->end],ÔÙ·ÖÅä¸øÁíÒ»¸öºóÀ´µÄÒ²ÐèÒªÕâ¸öÇø¼ä¶Î»òÕßÇø¼ä¶ÎÄÚ²¿·ÖµØÖ·µÄÉ豸ʵÌå,½ø¶ø±ÜÃâÉ豸֮¼ä³öÏÖ¶Ôͬһ×ÜÏßÎïÀíµØÖ·¶ÎµÄÖظ´ÒýÓÃ,¶øÔì³É¶ÔΨһÎïÀíµØÖ·µÄÉ豸ʵÌå¶þÒåÐÔ. ÒÔÉϵÄ4¸öÊôÐÔ½ö½öÓÃÀ´ÃèÊöÒ»¸öÉ豸ʵÌå×ÔÉí,»òÕßÊÇÉ豸ʵÌå¿ÉÒÔÓÃÀ´×ÔÖεĵ¥Ôª,µ«ÊÇÕâ²»ÊÇlinuxËùÏëµÄ,linuxÐèÒª¹ÜÀí4GÎïÀí×ÜÏßµÄËùÓпռä,ËùÒÔ¹Ò½Óµ½×ÜÏßÉϵÄÐÎÐÎÉ«É«µÄ¸÷ÖÖÉ豸ʵÌå,Õâ¾ÍÐèÒªÁ´ÔÚÒ»Æð,Òò´Ëresource½á¹¹ÌåÌṩÁËÁíÍâ3¸ö³ÉÔ±:Ö¸Õëparent¡¢siblingºÍchild£º·Ö±ðΪָÏò¸¸Çס¢ÐֵܺÍ×Ó×ÊÔ´µÄÖ¸Õë¡£ ÒÔroot sourceΪÀý£¬root->child(*pchild)Ö¸ÏòrootËùÓк¢×ÓÖеØÖ·¿Õ¼ä×îСµÄÒ»¸ö£»pchild->siblingÊÇÐÖµÜÁ´±íµÄ¿ªÍ·£¬Ö¸Ïò±È×Ô¼ºµØÖ·¿Õ¼ä´óµÄÐֵܡ£ ÎïÀíÄÚ´æÒ³ÃæÊÇÖØÒªµÄ×ÊÔ´¡£´ÓÁíÒ»¸ö½Ç¶È¿´£¬µØÖ·¿Õ¼ä±¾Éí£¬»òÕßÎïÀí´æ´¢Æ÷ÔÚµØÖ·¿Õ¼äÖеÄλÖã¬Ò²ÊÇÒ»ÖÖ×ÊÔ´£¬Ò²Òª¼ÓÒÔ¹ÜÀí -- resource¹ÜÀíµØÖ·¿Õ¼ä×ÊÔ´¡£ ÄÚºËÖÐÓÐÁ½¿ÃresourceÊ÷£¬Ò»¿ÃÊÇiomem_resour
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