1 // SPDX-License-Identifier: GPL-2.0-or-later
13  * - Fix various assumptions related to HW CPU numbers vs. linux CPU numbers
15  * - Implement proper handling of maxcpus=1/2 (that is, routing of irqs from
16  *   a non-active node to the active node)
32 #include <asm/cell-regs.h>
51 	unsigned char unit = bits.source & 0xf;  in iic_pending_to_hwnum()  local
59 		return (node << IIC_IRQ_NODE_SHIFT) | (class << 4) | unit;  in iic_pending_to_hwnum()
73 	out_be64(&iic->regs->prio, iic->eoi_stack[--iic->eoi_ptr]);  in iic_eoi()
74 	BUG_ON(iic->eoi_ptr < 0);  in iic_eoi()
78 	.name = "CELL-IIC",
100 		bits = in_be64(&node_iic->iic_is);  in iic_ioexc_cascade()
103 		/* pre-ack edge interrupts */  in iic_ioexc_cascade()
106 			out_be64(&node_iic->iic_is, ack);  in iic_ioexc_cascade()
108 		for (cascade = 63; cascade >= 0; cascade--)  in iic_ioexc_cascade()
112 		/* post-ack level interrupts */  in iic_ioexc_cascade()
115 			out_be64(&node_iic->iic_is, ack);  in iic_ioexc_cascade()
117 	chip->irq_eoi(&desc->irq_data);  in iic_ioexc_cascade()
122 	.name = "CELL-IOEX",
137 		in_be64((u64 __iomem *) &iic->regs->pending_destr);  in iic_get_irq()
143 	iic->eoi_stack[++iic->eoi_ptr] = pending.prio;  in iic_get_irq()
144 	BUG_ON(iic->eoi_ptr > 15);  in iic_get_irq()
150 	out_be64(&this_cpu_ptr(&cpu_iic)->regs->prio, 0xff);  in iic_setup_cpu()
165 	return IIC_IRQ_TYPE_IPI + 0xf - msg;  in iic_msg_to_irq()
170 	out_be64(&per_cpu(cpu_iic, cpu).regs->generate, (0xf - msg) << 4);  in iic_message_pass()
186 	 * the error.  If a message is not needed it will return non-zero.  in iic_request_ipi()
207 				    "IBM,CBEA-Internal-Interrupt-Controller");  in iic_host_match()
232 	unsigned int node, ext, unit, class;  in iic_host_xlate()  local
236 				     "IBM,CBEA-Internal-Interrupt-Controller"))  in iic_host_xlate()
237 		return -ENODEV;  in iic_host_xlate()
239 		return -ENODEV;  in iic_host_xlate()
240 	val = of_get_property(ct, "#interrupt-cells", NULL);  in iic_host_xlate()
242 		return -ENODEV;  in iic_host_xlate()
247 	unit = intspec[0] & 0xff;  in iic_host_xlate()
251 		return -EINVAL;  in iic_host_xlate()
255 	if (unit == IIC_UNIT_IIC && class == 1)  in iic_host_xlate()
259 			(class << IIC_IRQ_CLASS_SHIFT) | unit;  in iic_host_xlate()
281 	iic->regs = ioremap(addr, sizeof(struct cbe_iic_thread_regs));  in init_one_iic()
282 	BUG_ON(iic->regs == NULL);  in init_one_iic()
284 	iic->target_id = ((hw_cpu & 2) << 3) | ((hw_cpu & 1) ? 0xf : 0xe);  in init_one_iic()
285 	iic->eoi_stack[0] = 0xff;  in init_one_iic()
286 	iic->node = of_node_get(node);  in init_one_iic()
287 	out_be64(&iic->regs->prio, 0);  in init_one_iic()
290 	       hw_cpu, iic->target_id, node);  in init_one_iic()
301 	for_each_node_by_name(dn, "interrupt-controller") {  in setup_iic()
303 				     "IBM,CBEA-Internal-Interrupt-Controller"))  in setup_iic()
305 		np = of_get_property(dn, "ibm,interrupt-server-ranges", NULL);  in setup_iic()
309 			return -ENODEV;  in setup_iic()
315 			return -ENODEV;  in setup_iic()
340 		out_be64(&node_iic->iic_ir,  in setup_iic()
347 		out_be64(&node_iic->iic_is, 0xfffffffffffffffful);  in setup_iic()
353 		return -ENODEV;  in setup_iic()
368 	/* Set master interrupt handling function */  in iic_init_IRQ()
388 	out_be64(&iic_regs->iic_ir, iic_ir);  in iic_set_interrupt_routing()