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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 Regents of the University of California
4 * Copyright (C) 2017 SiFive
5 */
6
7#ifndef _ASM_RISCV_IRQ_H
8#define _ASM_RISCV_IRQ_H
9
10#include <linux/interrupt.h>
11#include <linux/linkage.h>
12
13#include <asm-generic/irq.h>
14
15#define INVALID_CONTEXT UINT_MAX
16
17#ifdef CONFIG_SMP
18void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu);
19#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
20#endif
21
22void riscv_set_intc_hwnode_fn(struct fwnode_handle *(*fn)(void));
23
24struct fwnode_handle *riscv_get_intc_hwnode(void);
25
26#ifdef CONFIG_ACPI
27
28enum riscv_irqchip_type {
29 ACPI_RISCV_IRQCHIP_INTC = 0x00,
30 ACPI_RISCV_IRQCHIP_IMSIC = 0x01,
31 ACPI_RISCV_IRQCHIP_PLIC = 0x02,
32 ACPI_RISCV_IRQCHIP_APLIC = 0x03,
33};
34
35int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base,
36 u32 *id, u32 *nr_irqs, u32 *nr_idcs);
37struct fwnode_handle *riscv_acpi_get_gsi_domain_id(u32 gsi);
38unsigned long acpi_rintc_index_to_hartid(u32 index);
39unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id, unsigned int ctxt_idx);
40unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id);
41unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx);
42int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res);
43
44#else
45static inline int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base,
46 u32 *id, u32 *nr_irqs, u32 *nr_idcs)
47{
48 return 0;
49}
50
51static inline unsigned long acpi_rintc_index_to_hartid(u32 index)
52{
53 return INVALID_HARTID;
54}
55
56static inline unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id,
57 unsigned int ctxt_idx)
58{
59 return INVALID_HARTID;
60}
61
62static inline unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id)
63{
64 return INVALID_CONTEXT;
65}
66
67static inline unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx)
68{
69 return INVALID_CONTEXT;
70}
71
72static inline int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res)
73{
74 return 0;
75}
76
77#endif /* CONFIG_ACPI */
78
79#endif /* _ASM_RISCV_IRQ_H */