1 // SPDX-License-Identifier: GPL-2.0
4  * Copyright (C) 2017-2018 SiFive
8 #define pr_fmt(fmt) "riscv-intc: " fmt
25 	unsigned long cause = regs->cause & ~CAUSE_IRQ_FLAG;  in riscv_intc_irq()
34  * On RISC-V systems local interrupts are masked or unmasked by writing
42 	csr_clear(CSR_IE, BIT(d->hwirq));  in riscv_intc_irq_mask()
47 	csr_set(CSR_IE, BIT(d->hwirq));  in riscv_intc_irq_unmask()
53 	 * The RISC-V INTC driver uses handle_percpu_devid_irq() flow  in riscv_intc_irq_eoi()
54 	 * for the per-HART local interrupts and child irqchip drivers  in riscv_intc_irq_eoi()
56 	 * chained handlers for the per-HART local interrupts.  in riscv_intc_irq_eoi()
60 	 * will do unnecessary mask/unmask of per-HART local interrupts  in riscv_intc_irq_eoi()
62 	 * an empty irq_eoi() callback for RISC-V INTC irqchip.  in riscv_intc_irq_eoi()
67 	.name = "RISC-V INTC",
77 	irq_domain_set_info(d, irq, hwirq, &riscv_intc_chip, d->host_data,  in riscv_intc_domain_map()
113 	return intc_domain->fwnode;  in riscv_intc_hwnode()
124 		return -ENXIO;  in riscv_intc_init_common()
140 static int __init riscv_intc_init(struct device_node *node,  in riscv_intc_init()  argument
146 	rc = riscv_of_parent_hartid(node, &hartid);  in riscv_intc_init()
148 		pr_warn("unable to find hart id for %pOF\n", node);  in riscv_intc_init()
153 	 * The DT will have one INTC DT node under each CPU (or HART)  in riscv_intc_init()
154 	 * DT node so riscv_intc_init() function will be called once  in riscv_intc_init()
155 	 * for each INTC DT node. We only need to do INTC initialization  in riscv_intc_init()
156 	 * for the INTC DT node belonging to boot CPU (or boot HART).  in riscv_intc_init()
162 		 * direct-mode) so we should mark an INTC node as initialized  in riscv_intc_init()
165 		fwnode_dev_initialized(of_fwnode_handle(node), true);  in riscv_intc_init()
169 	return riscv_intc_init_common(of_node_to_fwnode(node));  in riscv_intc_init()
172 IRQCHIP_DECLARE(riscv, "riscv,cpu-intc", riscv_intc_init);
190 	if (riscv_hartid_to_cpuid(rintc->hart_id) != smp_processor_id())  in riscv_intc_acpi_init()
193 	fn = irq_domain_alloc_named_fwnode("RISCV-INTC");  in riscv_intc_acpi_init()
195 		pr_err("unable to allocate INTC FW node\n");  in riscv_intc_acpi_init()
196 		return -ENOMEM;  in riscv_intc_acpi_init()