1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5 #ifndef _ASM_IRQ_H 6 #define _ASM_IRQ_H 7 8 #include <linux/irqdomain.h> 9 #include <linux/irqreturn.h> 10 11 #define IRQ_STACK_SIZE THREAD_SIZE 12 #define IRQ_STACK_START (IRQ_STACK_SIZE - 16) 13 14 DECLARE_PER_CPU(unsigned long, irq_stack); 15 16 /* 17 * The highest address on the IRQ stack contains a dummy frame which is 18 * structured as follows: 19 * 20 * top ------------ 21 * | task sp | <- irq_stack[cpu] + IRQ_STACK_START 22 * ------------ 23 * | | <- First frame of IRQ context 24 * ------------ 25 * 26 * task sp holds a copy of the task stack pointer where the struct pt_regs 27 * from exception entry can be found. 28 */ 29 on_irq_stack(int cpu,unsigned long sp)30static inline bool on_irq_stack(int cpu, unsigned long sp) 31 { 32 unsigned long low = per_cpu(irq_stack, cpu); 33 unsigned long high = low + IRQ_STACK_SIZE; 34 35 return (low <= sp && sp <= high); 36 } 37 38 void spurious_interrupt(void); 39 40 #define NR_IRQS_LEGACY 16 41 42 /* 43 * 256 Vectors Mapping for AVECINTC: 44 * 45 * 0 - 15: Mapping classic IPs, e.g. IP0-12. 46 * 16 - 255: Mapping vectors for external IRQ. 47 * 48 */ 49 #define NR_VECTORS 256 50 #define NR_LEGACY_VECTORS 16 51 #define IRQ_MATRIX_BITS NR_VECTORS 52 53 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace 54 void arch_trigger_cpumask_backtrace(const struct cpumask *mask, int exclude_cpu); 55 56 #define MAX_IO_PICS 2 57 #define NR_IRQS (64 + NR_VECTORS * (NR_CPUS + MAX_IO_PICS)) 58 59 struct acpi_vector_group { 60 int node; 61 int pci_segment; 62 struct irq_domain *parent; 63 }; 64 extern struct acpi_vector_group pch_group[MAX_IO_PICS]; 65 extern struct acpi_vector_group msi_group[MAX_IO_PICS]; 66 67 #define CORES_PER_EIO_NODE 4 68 69 #define LOONGSON_CPU_UART0_VEC 10 /* CPU UART0 */ 70 #define LOONGSON_CPU_THSENS_VEC 14 /* CPU Thsens */ 71 #define LOONGSON_CPU_HT0_VEC 16 /* CPU HT0 irq vector base number */ 72 #define LOONGSON_CPU_HT1_VEC 24 /* CPU HT1 irq vector base number */ 73 74 /* IRQ number definitions */ 75 #define LOONGSON_LPC_IRQ_BASE 0 76 #define LOONGSON_LPC_LAST_IRQ (LOONGSON_LPC_IRQ_BASE + 15) 77 78 #define LOONGSON_CPU_IRQ_BASE 16 79 #define LOONGSON_CPU_LAST_IRQ (LOONGSON_CPU_IRQ_BASE + 15) 80 81 #define LOONGSON_PCH_IRQ_BASE 64 82 #define LOONGSON_PCH_ACPI_IRQ (LOONGSON_PCH_IRQ_BASE + 47) 83 #define LOONGSON_PCH_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 64 - 1) 84 85 #define LOONGSON_MSI_IRQ_BASE (LOONGSON_PCH_IRQ_BASE + 64) 86 #define LOONGSON_MSI_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1) 87 88 #define GSI_MIN_LPC_IRQ LOONGSON_LPC_IRQ_BASE 89 #define GSI_MAX_LPC_IRQ (LOONGSON_LPC_IRQ_BASE + 16 - 1) 90 #define GSI_MIN_CPU_IRQ LOONGSON_CPU_IRQ_BASE 91 #define GSI_MAX_CPU_IRQ (LOONGSON_CPU_IRQ_BASE + 48 - 1) 92 #define GSI_MIN_PCH_IRQ LOONGSON_PCH_IRQ_BASE 93 #define GSI_MAX_PCH_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1) 94 95 struct acpi_madt_lio_pic; 96 struct acpi_madt_eio_pic; 97 struct acpi_madt_ht_pic; 98 struct acpi_madt_bio_pic; 99 struct acpi_madt_msi_pic; 100 struct acpi_madt_lpc_pic; 101 102 void complete_irq_moving(void); 103 104 struct fwnode_handle *get_pch_msi_handle(int pci_segment); 105 106 extern struct acpi_madt_lio_pic *acpi_liointc; 107 extern struct acpi_madt_eio_pic *acpi_eiointc[MAX_IO_PICS]; 108 109 extern struct acpi_madt_ht_pic *acpi_htintc; 110 extern struct acpi_madt_lpc_pic *acpi_pchlpc; 111 extern struct acpi_madt_msi_pic *acpi_pchmsi[MAX_IO_PICS]; 112 extern struct acpi_madt_bio_pic *acpi_pchpic[MAX_IO_PICS]; 113 114 extern struct fwnode_handle *cpuintc_handle; 115 extern struct fwnode_handle *liointc_handle; 116 extern struct fwnode_handle *pch_lpc_handle; 117 extern struct fwnode_handle *pch_pic_handle[MAX_IO_PICS]; 118 get_percpu_irq(int vector)119static inline int get_percpu_irq(int vector) 120 { 121 struct irq_domain *d; 122 123 d = irq_find_matching_fwnode(cpuintc_handle, DOMAIN_BUS_ANY); 124 if (d) 125 return irq_create_mapping(d, vector); 126 127 return -EINVAL; 128 } 129 130 #include <asm-generic/irq.h> 131 132 #endif /* _ASM_IRQ_H */ 133