alpha/kernel/irq_i8259.c

1 // SPDX-License-Identifier: GPL-2.0
6  * present in the majority of PC/AT boxes.
8  * Started hacking from linux-2.3.30pre6/arch/i386/kernel/i8259.c.
40 	i8259_update_irq_hw(d->irq, cached_irq_mask &= ~(1 << d->irq));  in i8259a_enable_irq()
54 	__i8259a_disable_irq(d->irq);  in i8259a_disable_irq()
61 	unsigned int irq = d->irq;  in i8259a_mask_and_ack_irq()
66 	/* Ack the interrupt making it the lowest priority.  */  in i8259a_mask_and_ack_irq()
68 		outb(0xE0 | (irq - 8), 0xa0);   /* ack the slave */  in i8259a_mask_and_ack_irq()
71 	outb(0xE0 | irq, 0x20);			/* ack the master */  in i8259a_mask_and_ack_irq()
76 	.name		= "XT-PIC",
87 	outb(0xff, 0x21);	/* mask all of 8259A-1 */  in init_i8259a_irqs()
88 	outb(0xff, 0xA1);	/* mask all of 8259A-2 */  in init_i8259a_irqs()
155 		pic &= pic - 1;  in isa_no_iack_sc_device_interrupt()