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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);
25int riscv_get_hart_index(struct fwnode_handle *fwnode, u32 logical_index,
26 u32 *hart_index);
27
28#ifdef CONFIG_ACPI
29
30enum riscv_irqchip_type {
31 ACPI_RISCV_IRQCHIP_INTC = 0x00,
32 ACPI_RISCV_IRQCHIP_IMSIC = 0x01,
33 ACPI_RISCV_IRQCHIP_PLIC = 0x02,
34 ACPI_RISCV_IRQCHIP_APLIC = 0x03,
35 ACPI_RISCV_IRQCHIP_SMSI = 0x04,
36};
37
38int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base,
39 u32 *id, u32 *nr_irqs, u32 *nr_idcs);
40struct fwnode_handle *riscv_acpi_get_gsi_domain_id(u32 gsi);
41unsigned long acpi_rintc_index_to_hartid(u32 index);
42unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id, unsigned int ctxt_idx);
43unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id);
44unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx);
45int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res);
46int riscv_acpi_update_gsi_range(u32 gsi_base, u32 nr_irqs);
47
48#else
49static inline int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base,
50 u32 *id, u32 *nr_irqs, u32 *nr_idcs)
51{
52 return 0;
53}
54
55static inline unsigned long acpi_rintc_index_to_hartid(u32 index)
56{
57 return INVALID_HARTID;
58}
59
60static inline unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id,
61 unsigned int ctxt_idx)
62{
63 return INVALID_HARTID;
64}
65
66static inline unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id)
67{
68 return INVALID_CONTEXT;
69}
70
71static inline unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx)
72{
73 return INVALID_CONTEXT;
74}
75
76static inline int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res)
77{
78 return 0;
79}
80
81static inline int riscv_acpi_update_gsi_range(u32 gsi_base, u32 nr_irqs)
82{
83 return -ENODEV;
84}
85#endif /* CONFIG_ACPI */
86
87#endif /* _ASM_RISCV_IRQ_H */