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@ -25,7 +25,7 @@
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* --------------------------------------------------------------------------- */
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//定义了一些与硬件中断处理相关的数据结构和函数接口，用于操作和管理系统中的硬件中断。
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#ifndef _LOS_HWI_PRI_H
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#define _LOS_HWI_PRI_H
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@ -67,9 +67,11 @@ typedef struct {
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} HwiControllerOps;
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extern const HwiControllerOps *g_hwiOps;
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//用于初始化硬件中断
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extern VOID OsHwiInit(VOID);
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//用于获取当前中断嵌套的计数值，可以用于检查当前是否处于中断嵌套状态。
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extern size_t OsIrqNestingCntGet(VOID);
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//用于设置中断嵌套的计数值。
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extern VOID OsIrqNestingCntSet(size_t val);
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/**
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@ -77,8 +79,9 @@ extern VOID OsIrqNestingCntSet(size_t val);
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* by the kernel. The handleIrq hook function MUST be registered in the interrupt controller driver layer, otherwise it
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* will not respond. eg: Used for arm(cortex-a/r)/arm64.
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*/
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//一个汇编入口函数，由汇编代码在dispatch.S中调用，用于统一处理外部中断的入口，由内核接管中断处理流程。
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extern VOID OsIntEntry(VOID);
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//根据中断号获取中断处理信息的指针
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STATIC INLINE HwiHandleInfo *OsGetHwiForm(UINT32 hwiNum)
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{
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if ((g_hwiOps == NULL) || (g_hwiOps->getHandleForm == NULL)) {
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@ -86,7 +89,7 @@ STATIC INLINE HwiHandleInfo *OsGetHwiForm(UINT32 hwiNum)
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}
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return g_hwiOps->getHandleForm(hwiNum);
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}
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//用于获取指定中断的响应计数值
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STATIC INLINE UINT32 OsGetHwiFormCnt(UINT32 hwiNum)
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{
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HwiHandleInfo *hwiForm = OsGetHwiForm(hwiNum);
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@ -96,7 +99,7 @@ STATIC INLINE UINT32 OsGetHwiFormCnt(UINT32 hwiNum)
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}
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return hwiForm->respCount;
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}
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//用于获取当前正在处理的中断号。
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STATIC INLINE UINT32 OsIntNumGet(VOID)
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{
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if ((g_hwiOps == NULL) || (g_hwiOps->getCurIrqNum == NULL)) {
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@ -104,7 +107,7 @@ STATIC INLINE UINT32 OsIntNumGet(VOID)
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}
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return g_hwiOps->getCurIrqNum();
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}
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//用于判断指定的中断号是否已经注册了相应的处理函数。
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STATIC INLINE BOOL OsIntIsRegisted(UINT32 num)
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{
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HwiHandleInfo *hwiForm = OsGetHwiForm(num);
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@ -118,7 +121,7 @@ STATIC INLINE BOOL OsIntIsRegisted(UINT32 num)
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return (hwiForm->hook != NULL);
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#endif
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}
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//用于获取指定中断的注册参数信息。
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STATIC INLINE HWI_ARG_T OsIntGetPara(UINT32 num)
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{
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HwiHandleInfo *hwiForm = OsGetHwiForm(num);
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@ -128,7 +131,7 @@ STATIC INLINE HWI_ARG_T OsIntGetPara(UINT32 num)
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}
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return hwiForm->registerInfo;
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}
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//用于获取中断版本信息。
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STATIC INLINE CHAR *OsIntVersionGet(VOID)
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{
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if ((g_hwiOps == NULL) || (g_hwiOps->getIrqVersion == NULL)) {
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@ -143,6 +146,7 @@ STATIC INLINE CHAR *OsIntVersionGet(VOID)
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* handleForm to this interface.
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* eg: Used for arm(cortex-m),xtensa,riscv.
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*/
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//在中断控制器驱动层实现通用的中断处理入口，用于传递中断号和处理信息给相应的处理函数。
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extern VOID OsIntHandle(UINT32 hwiNum, HwiHandleInfo *handleForm);
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/**
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@ -151,6 +155,7 @@ extern VOID OsIntHandle(UINT32 hwiNum, HwiHandleInfo *handleForm);
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* HwiControllerOps need to be registered. If this function is not supported, you can call the LOS_Panic interface in
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* the implementation of the stub function to report an error in time.
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*/
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//用于注册中断控制器相关的操作函数，需要在中断控制器初始化时被调用。
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STATIC INLINE VOID OsHwiControllerReg(const HwiControllerOps *ops)
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{
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g_hwiOps = ops;
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