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 30 static 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 int get_ipi_irq(void); 39 int get_pmc_irq(void); 40 int get_timer_irq(void); 41 void spurious_interrupt(void); 42 43 #define NR_IRQS_LEGACY 16 44 45 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace 46 void arch_trigger_cpumask_backtrace(const struct cpumask *mask, bool exclude_self); 47 48 #define MAX_IO_PICS 2 49 #define NR_IRQS (64 + (256 * MAX_IO_PICS)) 50 51 struct acpi_vector_group { 52 int node; 53 int pci_segment; 54 struct irq_domain *parent; 55 }; 56 extern struct acpi_vector_group pch_group[MAX_IO_PICS]; 57 extern struct acpi_vector_group msi_group[MAX_IO_PICS]; 58 59 #define CORES_PER_EIO_NODE 4 60 61 #define LOONGSON_CPU_UART0_VEC 10 /* CPU UART0 */ 62 #define LOONGSON_CPU_THSENS_VEC 14 /* CPU Thsens */ 63 #define LOONGSON_CPU_HT0_VEC 16 /* CPU HT0 irq vector base number */ 64 #define LOONGSON_CPU_HT1_VEC 24 /* CPU HT1 irq vector base number */ 65 66 /* IRQ number definitions */ 67 #define LOONGSON_LPC_IRQ_BASE 0 68 #define LOONGSON_LPC_LAST_IRQ (LOONGSON_LPC_IRQ_BASE + 15) 69 70 #define LOONGSON_CPU_IRQ_BASE 16 71 #define LOONGSON_CPU_LAST_IRQ (LOONGSON_CPU_IRQ_BASE + 14) 72 73 #define LOONGSON_PCH_IRQ_BASE 64 74 #define LOONGSON_PCH_ACPI_IRQ (LOONGSON_PCH_IRQ_BASE + 47) 75 #define LOONGSON_PCH_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 64 - 1) 76 77 #define LOONGSON_MSI_IRQ_BASE (LOONGSON_PCH_IRQ_BASE + 64) 78 #define LOONGSON_MSI_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1) 79 80 #define GSI_MIN_LPC_IRQ LOONGSON_LPC_IRQ_BASE 81 #define GSI_MAX_LPC_IRQ (LOONGSON_LPC_IRQ_BASE + 16 - 1) 82 #define GSI_MIN_CPU_IRQ LOONGSON_CPU_IRQ_BASE 83 #define GSI_MAX_CPU_IRQ (LOONGSON_CPU_IRQ_BASE + 48 - 1) 84 #define GSI_MIN_PCH_IRQ LOONGSON_PCH_IRQ_BASE 85 #define GSI_MAX_PCH_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1) 86 87 extern int find_pch_pic(u32 gsi); 88 extern int eiointc_get_node(int id); 89 90 static inline void eiointc_enable(void) 91 { 92 uint64_t misc; 93 94 misc = iocsr_read64(LOONGARCH_IOCSR_MISC_FUNC); 95 misc |= IOCSR_MISC_FUNC_EXT_IOI_EN; 96 iocsr_write64(misc, LOONGARCH_IOCSR_MISC_FUNC); 97 } 98 99 struct acpi_madt_lio_pic; 100 struct acpi_madt_eio_pic; 101 struct acpi_madt_ht_pic; 102 struct acpi_madt_bio_pic; 103 struct acpi_madt_msi_pic; 104 struct acpi_madt_lpc_pic; 105 106 struct irq_domain *loongarch_cpu_irq_init(void); 107 108 struct irq_domain *liointc_acpi_init(struct irq_domain *parent, 109 struct acpi_madt_lio_pic *acpi_liointc); 110 struct irq_domain *eiointc_acpi_init(struct irq_domain *parent, 111 struct acpi_madt_eio_pic *acpi_eiointc); 112 113 struct irq_domain *htvec_acpi_init(struct irq_domain *parent, 114 struct acpi_madt_ht_pic *acpi_htvec); 115 int pch_lpc_acpi_init(struct irq_domain *parent, 116 struct acpi_madt_lpc_pic *acpi_pchlpc); 117 struct irq_domain *pch_msi_acpi_init(struct irq_domain *parent, 118 struct acpi_madt_msi_pic *acpi_pchmsi); 119 struct irq_domain *pch_pic_acpi_init(struct irq_domain *parent, 120 struct acpi_madt_bio_pic *acpi_pchpic); 121 122 extern struct acpi_madt_lio_pic *acpi_liointc; 123 extern struct acpi_madt_eio_pic *acpi_eiointc[MAX_IO_PICS]; 124 125 extern struct acpi_madt_ht_pic *acpi_htintc; 126 extern struct acpi_madt_lpc_pic *acpi_pchlpc; 127 extern struct acpi_madt_msi_pic *acpi_pchmsi[MAX_IO_PICS]; 128 extern struct acpi_madt_bio_pic *acpi_pchpic[MAX_IO_PICS]; 129 130 extern struct irq_domain *cpu_domain; 131 extern struct irq_domain *liointc_domain; 132 extern struct fwnode_handle *pch_lpc_handle; 133 extern struct irq_domain *pch_msi_domain[MAX_IO_PICS]; 134 extern struct irq_domain *pch_pic_domain[MAX_IO_PICS]; 135 136 extern irqreturn_t loongson3_ipi_interrupt(int irq, void *dev); 137 138 #include <asm-generic/irq.h> 139 140 #endif /* _ASM_IRQ_H */ 141