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