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)
20 #include <linux/irq.h>
33 #include <asm/cell-regs.h>
49 /* Convert between "pending" bits and hw irq number */
74 	out_be64(&iic->regs->prio, iic->eoi_stack[--iic->eoi_ptr]);  in iic_eoi()
75 	BUG_ON(iic->eoi_ptr < 0);  in iic_eoi()
79 	.name = "CELL-IIC",
95 	unsigned int irq = irq_desc_get_irq(desc);  in iic_ioexc_cascade()  local
96 	unsigned int base = (irq & 0xffffff00) | IIC_IRQ_TYPE_IOEXC;  in iic_ioexc_cascade()
101 		bits = in_be64(&node_iic->iic_is);  in iic_ioexc_cascade()
104 		/* pre-ack edge interrupts */  in iic_ioexc_cascade()
107 			out_be64(&node_iic->iic_is, ack);  in iic_ioexc_cascade()
109 		for (cascade = 63; cascade >= 0; cascade--)  in iic_ioexc_cascade()
113 		/* post-ack level interrupts */  in iic_ioexc_cascade()
116 			out_be64(&node_iic->iic_is, ack);  in iic_ioexc_cascade()
118 	chip->irq_eoi(&desc->irq_data);  in iic_ioexc_cascade()
123 	.name = "CELL-IOEX",
129 /* Get an IRQ number from the pending state register of the IIC */
138 		in_be64((u64 __iomem *) &iic->regs->pending_destr);  in iic_get_irq()
144 	iic->eoi_stack[++iic->eoi_ptr] = pending.prio;  in iic_get_irq()
145 	BUG_ON(iic->eoi_ptr > 15);  in iic_get_irq()
151 	out_be64(&this_cpu_ptr(&cpu_iic)->regs->prio, 0xff);  in iic_setup_cpu()
166 	return IIC_IRQ_TYPE_IPI + 0xf - msg;  in iic_msg_to_irq()
171 	out_be64(&per_cpu(cpu_iic, cpu).regs->generate, (0xf - msg) << 4);  in iic_message_pass()
187 	 * the error.  If a message is not needed it will return non-zero.  in iic_request_ipi()
208 				    "IBM,CBEA-Internal-Interrupt-Controller");  in iic_host_match()
233 	unsigned int node, ext, unit, class;  in iic_host_xlate()  local
237 				     "IBM,CBEA-Internal-Interrupt-Controller"))  in iic_host_xlate()
238 		return -ENODEV;  in iic_host_xlate()
240 		return -ENODEV;  in iic_host_xlate()
241 	val = of_get_property(ct, "#interrupt-cells", NULL);  in iic_host_xlate()
243 		return -ENODEV;  in iic_host_xlate()
246 	ext = (intspec[0] >> 16) & 0xff;  in iic_host_xlate()
250 	/* Check if node is in supported range */  in iic_host_xlate()
252 		return -EINVAL;  in iic_host_xlate()
257 		*out_hwirq |= IIC_IRQ_TYPE_IOEXC | ext;  in iic_host_xlate()
282 	iic->regs = ioremap(addr, sizeof(struct cbe_iic_thread_regs));  in init_one_iic()
283 	BUG_ON(iic->regs == NULL);  in init_one_iic()
285 	iic->target_id = ((hw_cpu & 2) << 3) | ((hw_cpu & 1) ? 0xf : 0xe);  in init_one_iic()
286 	iic->eoi_stack[0] = 0xff;  in init_one_iic()
287 	iic->node = of_node_get(node);  in init_one_iic()
288 	out_be64(&iic->regs->prio, 0);  in init_one_iic()
291 	       hw_cpu, iic->target_id, node);  in init_one_iic()
302 	for_each_node_by_name(dn, "interrupt-controller") {  in setup_iic()
304 				     "IBM,CBEA-Internal-Interrupt-Controller"))  in setup_iic()
306 		np = of_get_property(dn, "ibm,interrupt-server-ranges", NULL);  in setup_iic()
310 			return -ENODEV;  in setup_iic()
316 			return -ENODEV;  in setup_iic()
341 		out_be64(&node_iic->iic_ir,  in setup_iic()
348 		out_be64(&node_iic->iic_is, 0xfffffffffffffffful);  in setup_iic()
354 		return -ENODEV;  in setup_iic()
359 	/* Setup an irq host data structure */  in iic_init_IRQ()
389 	out_be64(&iic_regs->iic_ir, iic_ir);  in iic_set_interrupt_routing()