1 // SPDX-License-Identifier: GPL-2.0
4  * Copyright (C) 2017-2018 SiFive
8 #define pr_fmt(fmt) "riscv-intc: " fmt
29 	unsigned long cause = regs->cause & ~CAUSE_IRQ_FLAG;  in riscv_intc_irq()
36  * On RISC-V systems local interrupts are masked or unmasked by writing
44 	csr_clear(CSR_IE, BIT(d->hwirq));  in riscv_intc_irq_mask()
49 	csr_set(CSR_IE, BIT(d->hwirq));  in riscv_intc_irq_unmask()
55 	 * Andes specific S-mode local interrupt causes (hwirq)  in andes_intc_irq_mask()
56 	 * are defined as (256 + n) and controlled by n-th bit  in andes_intc_irq_mask()
59 	unsigned int mask = BIT(d->hwirq % BITS_PER_LONG);  in andes_intc_irq_mask()
61 	if (d->hwirq < ANDES_SLI_CAUSE_BASE)  in andes_intc_irq_mask()
69 	unsigned int mask = BIT(d->hwirq % BITS_PER_LONG);  in andes_intc_irq_unmask()
71 	if (d->hwirq < ANDES_SLI_CAUSE_BASE)  in andes_intc_irq_unmask()
80 	 * The RISC-V INTC driver uses handle_percpu_devid_irq() flow  in riscv_intc_irq_eoi()
81 	 * for the per-HART local interrupts and child irqchip drivers  in riscv_intc_irq_eoi()
82 	 * (such as PLIC, SBI IPI, CLINT, APLIC, IMSIC, etc) implement  in riscv_intc_irq_eoi()
83 	 * chained handlers for the per-HART local interrupts.  in riscv_intc_irq_eoi()
87 	 * will do unnecessary mask/unmask of per-HART local interrupts  in riscv_intc_irq_eoi()
89 	 * an empty irq_eoi() callback for RISC-V INTC irqchip.  in riscv_intc_irq_eoi()
94 	.name = "RISC-V INTC",
101 	.name		= "RISC-V INTC",
110 	struct irq_chip *chip = d->host_data;  in riscv_intc_domain_map()
138 		return -EINVAL;  in riscv_intc_domain_alloc()
157 	return intc_domain->fwnode;  in riscv_intc_hwnode()
168 		return -ENXIO;  in riscv_intc_init_common()
211 		 * direct-mode) so we should mark an INTC node as initialized  in riscv_intc_init()
218 	if (of_device_is_compatible(node, "andestech,cpu-intc")) {  in riscv_intc_init()
227 IRQCHIP_DECLARE(riscv, "riscv,cpu-intc", riscv_intc_init);
228 IRQCHIP_DECLARE(andes, "andestech,cpu-intc", riscv_intc_init);
247 	if (riscv_hartid_to_cpuid(rintc->hart_id) != smp_processor_id())  in riscv_intc_acpi_init()
250 	fn = irq_domain_alloc_named_fwnode("RISCV-INTC");  in riscv_intc_acpi_init()
253 		return -ENOMEM;  in riscv_intc_acpi_init()