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
18 void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu);
19 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
20 #endif
21
22 void riscv_set_intc_hwnode_fn(struct fwnode_handle *(*fn)(void));
23
24 struct fwnode_handle *riscv_get_intc_hwnode(void);
25
26 #ifdef CONFIG_ACPI
27
28 enum 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
35 int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base,
36 u32 *id, u32 *nr_irqs, u32 *nr_idcs);
37 struct fwnode_handle *riscv_acpi_get_gsi_domain_id(u32 gsi);
38 unsigned long acpi_rintc_index_to_hartid(u32 index);
39 unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id, unsigned int ctxt_idx);
40 unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id);
41 unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx);
42 int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res);
43
44 #else
45 static 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
51 static inline unsigned long acpi_rintc_index_to_hartid(u32 index)
52 {
53 return INVALID_HARTID;
54 }
55
56 static 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
62 static inline unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id)
63 {
64 return INVALID_CONTEXT;
65 }
66
67 static inline unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx)
68 {
69 return INVALID_CONTEXT;
70 }
71
72 static 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 */
80
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