irq.h (4177B)
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 14DECLARE_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 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 38int get_ipi_irq(void); 39int get_pmc_irq(void); 40int get_timer_irq(void); 41void spurious_interrupt(void); 42 43#define NR_IRQS_LEGACY 16 44 45#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace 46void 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 79extern int find_pch_pic(u32 gsi); 80extern int eiointc_get_node(int id); 81 82static 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 91struct acpi_madt_lio_pic; 92struct acpi_madt_eio_pic; 93struct acpi_madt_ht_pic; 94struct acpi_madt_bio_pic; 95struct acpi_madt_msi_pic; 96struct acpi_madt_lpc_pic; 97 98struct irq_domain *loongarch_cpu_irq_init(void); 99 100struct irq_domain *liointc_acpi_init(struct irq_domain *parent, 101 struct acpi_madt_lio_pic *acpi_liointc); 102struct irq_domain *eiointc_acpi_init(struct irq_domain *parent, 103 struct acpi_madt_eio_pic *acpi_eiointc); 104 105struct irq_domain *htvec_acpi_init(struct irq_domain *parent, 106 struct acpi_madt_ht_pic *acpi_htvec); 107struct irq_domain *pch_lpc_acpi_init(struct irq_domain *parent, 108 struct acpi_madt_lpc_pic *acpi_pchlpc); 109struct irq_domain *pch_msi_acpi_init(struct irq_domain *parent, 110 struct acpi_madt_msi_pic *acpi_pchmsi); 111struct irq_domain *pch_pic_acpi_init(struct irq_domain *parent, 112 struct acpi_madt_bio_pic *acpi_pchpic); 113 114extern struct acpi_madt_lio_pic *acpi_liointc; 115extern struct acpi_madt_eio_pic *acpi_eiointc[MAX_IO_PICS]; 116 117extern struct acpi_madt_ht_pic *acpi_htintc; 118extern struct acpi_madt_lpc_pic *acpi_pchlpc; 119extern struct acpi_madt_msi_pic *acpi_pchmsi[MAX_IO_PICS]; 120extern struct acpi_madt_bio_pic *acpi_pchpic[MAX_IO_PICS]; 121 122extern struct irq_domain *cpu_domain; 123extern struct irq_domain *liointc_domain; 124extern struct irq_domain *pch_lpc_domain; 125extern struct irq_domain *pch_msi_domain[MAX_IO_PICS]; 126extern struct irq_domain *pch_pic_domain[MAX_IO_PICS]; 127 128extern irqreturn_t loongson3_ipi_interrupt(int irq, void *dev); 129 130#include <asm-generic/irq.h> 131 132#endif /* _ASM_IRQ_H */