irq.h

 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 */