remarkable-linux/include/linux/htirq.h

#ifndef LINUX_HTIRQ_H
#define LINUX_HTIRQ_H

struct ht_irq_msg {
	u32	address_lo;	/* low 32 bits of the ht irq message */
	u32	address_hi;	/* high 32 bits of the it irq message */
};

/* Helper functions.. */
void fetch_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg);
void write_ht_irq_msg(unsigned int irq, struct ht_irq_msg *msg);
void mask_ht_irq(unsigned int irq);
void unmask_ht_irq(unsigned int irq);

/* The arch hook for getting things started */
int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev);

#endif /* LINUX_HTIRQ_H */