1 #ifndef QEMU_IRQ_H 2 #define QEMU_IRQ_H 3 4 /* Generic IRQ/GPIO pin infrastructure. */ 5 6 typedef struct IRQState *qemu_irq; 7 8 typedef void (*qemu_irq_handler)(void *opaque, int n, int level); 9 10 void qemu_set_irq(qemu_irq irq, int level); 11 12 static inline void qemu_irq_raise(qemu_irq irq) 13 { 14 qemu_set_irq(irq, 1); 15 } 16 17 static inline void qemu_irq_lower(qemu_irq irq) 18 { 19 qemu_set_irq(irq, 0); 20 } 21 22 static inline void qemu_irq_pulse(qemu_irq irq) 23 { 24 qemu_set_irq(irq, 1); 25 qemu_set_irq(irq, 0); 26 } 27 28 /* Returns an array of N IRQs. Each IRQ is assigned the argument handler and 29 * opaque data. 30 */ 31 qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n); 32 33 /* Extends an Array of IRQs. Old IRQs have their handlers and opaque data 34 * preserved. New IRQs are assigned the argument handler and opaque data. 35 */ 36 qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler, 37 void *opaque, int n); 38 39 void qemu_free_irqs(qemu_irq *s); 40 41 /* Returns a new IRQ with opposite polarity. */ 42 qemu_irq qemu_irq_invert(qemu_irq irq); 43 44 /* Returns a new IRQ which feeds into both the passed IRQs */ 45 qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2); 46 47 /* Returns a new IRQ set which connects 1:1 to another IRQ set, which 48 * may be set later. 49 */ 50 qemu_irq *qemu_irq_proxy(qemu_irq **target, int n); 51 52 /* For internal use in qtest. Similar to qemu_irq_split, but operating 53 on an existing vector of qemu_irq. */ 54 void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n); 55 void qemu_irq_intercept_out(qemu_irq **gpio_out, qemu_irq_handler handler, int n); 56 57 #endif 58