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 int riscv_get_hart_index(struct fwnode_handle *fwnode, u32 logical_index,
26 u32 *hart_index);
27
28 #ifdef CONFIG_ACPI
29
30 enum 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
38 int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base,
39 u32 *id, u32 *nr_irqs, u32 *nr_idcs);
40 struct fwnode_handle *riscv_acpi_get_gsi_domain_id(u32 gsi);
41 unsigned long acpi_rintc_index_to_hartid(u32 index);
42 unsigned long acpi_rintc_ext_parent_to_hartid(unsigned int plic_id, unsigned int ctxt_idx);
43 unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id);
44 unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx);
45 int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res);
46 int riscv_acpi_update_gsi_range(u32 gsi_base, u32 nr_irqs);
47
48 #else
riscv_acpi_get_gsi_info(struct fwnode_handle * fwnode,u32 * gsi_base,u32 * id,u32 * nr_irqs,u32 * nr_idcs)49 static 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
acpi_rintc_index_to_hartid(u32 index)55 static inline unsigned long acpi_rintc_index_to_hartid(u32 index)
56 {
57 return INVALID_HARTID;
58 }
59
acpi_rintc_ext_parent_to_hartid(unsigned int plic_id,unsigned int ctxt_idx)60 static 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
acpi_rintc_get_plic_nr_contexts(unsigned int plic_id)66 static inline unsigned int acpi_rintc_get_plic_nr_contexts(unsigned int plic_id)
67 {
68 return INVALID_CONTEXT;
69 }
70
acpi_rintc_get_plic_context(unsigned int plic_id,unsigned int ctxt_idx)71 static inline unsigned int acpi_rintc_get_plic_context(unsigned int plic_id, unsigned int ctxt_idx)
72 {
73 return INVALID_CONTEXT;
74 }
75
acpi_rintc_get_imsic_mmio_info(u32 index,struct resource * res)76 static inline int __init acpi_rintc_get_imsic_mmio_info(u32 index, struct resource *res)
77 {
78 return 0;
79 }
80
riscv_acpi_update_gsi_range(u32 gsi_base,u32 nr_irqs)81 static 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 */
88