mirror of
https://github.com/qemu/qemu.git
synced 2024-12-17 01:03:51 +08:00
0ebfc997d2
Signed-off-by: Zongyuan Li <zongyuan.li@smartx.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20220324181557.203805-5-zongyuan.li@smartx.com Resolves: https://gitlab.com/qemu-project/qemu/-/issues/811 Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
#ifndef QEMU_IRQ_H
|
|
#define QEMU_IRQ_H
|
|
|
|
/* Generic IRQ/GPIO pin infrastructure. */
|
|
|
|
#define TYPE_IRQ "irq"
|
|
|
|
void qemu_set_irq(qemu_irq irq, int level);
|
|
|
|
static inline void qemu_irq_raise(qemu_irq irq)
|
|
{
|
|
qemu_set_irq(irq, 1);
|
|
}
|
|
|
|
static inline void qemu_irq_lower(qemu_irq irq)
|
|
{
|
|
qemu_set_irq(irq, 0);
|
|
}
|
|
|
|
static inline void qemu_irq_pulse(qemu_irq irq)
|
|
{
|
|
qemu_set_irq(irq, 1);
|
|
qemu_set_irq(irq, 0);
|
|
}
|
|
|
|
/* Returns an array of N IRQs. Each IRQ is assigned the argument handler and
|
|
* opaque data.
|
|
*/
|
|
qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
|
|
|
|
/*
|
|
* Allocates a single IRQ. The irq is assigned with a handler, an opaque
|
|
* data and the interrupt number.
|
|
*/
|
|
qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n);
|
|
|
|
/* Extends an Array of IRQs. Old IRQs have their handlers and opaque data
|
|
* preserved. New IRQs are assigned the argument handler and opaque data.
|
|
*/
|
|
qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
|
|
void *opaque, int n);
|
|
|
|
void qemu_free_irqs(qemu_irq *s, int n);
|
|
void qemu_free_irq(qemu_irq irq);
|
|
|
|
/* Returns a new IRQ with opposite polarity. */
|
|
qemu_irq qemu_irq_invert(qemu_irq irq);
|
|
|
|
/* For internal use in qtest. Similar to qemu_irq_split, but operating
|
|
on an existing vector of qemu_irq. */
|
|
void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n);
|
|
|
|
/**
|
|
* qemu_irq_is_connected: Return true if IRQ line is wired up
|
|
*
|
|
* If a qemu_irq has a device on the other (receiving) end of it,
|
|
* return true; otherwise return false.
|
|
*
|
|
* Usually device models don't need to care whether the machine model
|
|
* has wired up their outbound qemu_irq lines, because functions like
|
|
* qemu_set_irq() silently do nothing if there is nothing on the other
|
|
* end of the line. However occasionally a device model will want to
|
|
* provide default behaviour if its output is left floating, and
|
|
* it can use this function to identify when that is the case.
|
|
*/
|
|
static inline bool qemu_irq_is_connected(qemu_irq irq)
|
|
{
|
|
return irq != NULL;
|
|
}
|
|
|
|
#endif
|