linux軟中斷和工作隊列的作用是什么

/** ?*?struct?irq_desc?-?interrupt?descriptor ?* ?*?@handle_irq:????????highlevel?irq-events?handler?[if?NULL,?__do_IRQ()] ?*?@chip:????????low?level?interrupt?hardware?access ?*?@msi_desc:????????MSI?descriptor ?*?@handler_data:????per-IRQ?data?for?the?irq_chip?methods ?*?@chip_data:????????platform-specific?per-chip?private?data?for?the?chip ?*????????????methods,?to?allow?shared?chip?implementations ?*?@action:????????the?irq?action?chain ?*?@status:????????status?information ?*?@depth:????????disable-depth,?for?nested?irq_disable()?calls ?*?@wake_depth:????????enable?depth,?for?multiple?set_irq_wake()?callers ?*?@irq_count:????????stats?field?to?detect?stalled?irqs ?*?@irqs_unhandled:????stats?field?for?spurious?unhandled?interrupts ?*?@lock:????????locking?for?SMP ?*?@affinity:????????IRQ?affinity?on?SMP ?*?@cpu:????????cpu?index?useful?for?balancing ?*?@pending_mask:????pending?rebalanced?interrupts ?*?@dir:????????/proc/irq/?procfs?entry ?*?@affinity_entry:????/proc/irq/smp_affinity?procfs?entry?on?SMP ?*?@name:????????flow?handler?name?for?/proc/interrupts?output?*/struct?irq_desc?{ ????irq_flow_handler_t????handle_irq;????struct?irq_chip????????*chip;????struct?msi_desc????????*msi_desc;????void????????????*handler_data;????void????????????*chip_data;????struct?irqaction????*action;????/*?IRQ?action?list?*/ ????unsigned?int????????status;????????/*?IRQ?status?*/  ????unsigned?int????????depth;????????/*?nested?irq?disables?*/ ????unsigned?int????????wake_depth;????/*?nested?wake?enables?*/ ????unsigned?int????????irq_count;????/*?For?detecting?broken?IRQs?*/ ????unsigned?int????????irqs_unhandled; ????spinlock_t????????lock; #ifdef?CONFIG_SMP ????cpumask_t????????affinity; ????unsigned?int????????cpu;#endif#if?defined(CONFIG_GENERIC_PENDING_IRQ)?||?defined(CONFIG_IRQBALANCE) ????cpumask_t????????pending_mask;#endif#ifdef?CONFIG_PROC_FS????struct?proc_dir_entry????*dir;#endif ????const?char????????*name; }?____cacheline_internodealigned_in_smp;

struct?irqaction?{ ????irq_handler_t?handler; ????unsigned?long?flags; ????cpumask_t?mask;????const?char?*name;????void?*dev_id;????struct?irqaction?*next;????int?irq;????struct?proc_dir_entry?*dir; };

/** ?*?struct?irq_chip?-?hardware?interrupt?chip?descriptor ?* ?*?@name:????????name?for?/proc/interrupts ?*?@startup:????????start?up?the?interrupt?(defaults?to?->enable?if?NULL) ?*?@shutdown:????????shut?down?the?interrupt?(defaults?to?->disable?if?NULL) ?*?@enable:????????enable?the?interrupt?(defaults?to?chip->unmask?if?NULL) ?*?@disable:????????disable?the?interrupt?(defaults?to?chip->mask?if?NULL) ?*?@ack:????????start?of?a?new?interrupt ?*?@mask:????????mask?an?interrupt?source ?*?@mask_ack:????????ack?and?mask?an?interrupt?source ?*?@unmask:????????unmask?an?interrupt?source ?*?@eoi:????????end?of?interrupt?-?chip?level ?*?@end:????????end?of?interrupt?-?flow?level ?*?@set_affinity:????set?the?CPU?affinity?on?SMP?machines ?*?@retrigger:????????resend?an?IRQ?to?the?CPU ?*?@set_type:????????set?the?flow?type?(IRQ_TYPE_LEVEL/etc.)?of?an?IRQ ?*?@set_wake:????????enable/disable?power-management?wake-on?of?an?IRQ ?* ?*?@release:????????release?function?solely?used?by?UML ?*?@typename:????????obsoleted?by?name,?kept?as?migration?helper?*/struct?irq_chip?{????const?char????*name; ????unsigned?int????(*startup)(unsigned?int?irq);　　//中斷開始????void????????(*shutdown)(unsigned?int?irq);　　　　//中斷關閉????void????????(*enable)(unsigned?int?irq);　　　　　　//中斷使能????void????????(*disable)(unsigned?int?irq);　　　　//中斷禁用????void????????(*ack)(unsigned?int?irq);????void????????(*mask)(unsigned?int?irq);????void????????(*mask_ack)(unsigned?int?irq);????void????????(*unmask)(unsigned?int?irq);????void????????(*eoi)(unsigned?int?irq);????void????????(*end)(unsigned?int?irq);????void????????(*set_affinity)(unsigned?int?irq,?cpumask_t?dest);????int????????(*retrigger)(unsigned?int?irq);????int????????(*set_type)(unsigned?int?irq,?unsigned?int?flow_type);????int????????(*set_wake)(unsigned?int?irq,?unsigned?int?on);????/*?Currently?used?only?by?UML,?might?disappear?one?day.*/#ifdef?CONFIG_IRQ_RELEASE_METHOD????void????????(*release)(unsigned?int?irq,?void?*dev_id);#endif ????/* ?????*?For?compatibility,?->typename?is?copied?into?->name. ?????*?Will?disappear.?????*/ ????const?char????*typename; };