arch/riscv/include/asm/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
  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 */