1*0603839bSHuacai Chen /* SPDX-License-Identifier: GPL-2.0 */ 2*0603839bSHuacai Chen /* 3*0603839bSHuacai Chen * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4*0603839bSHuacai Chen */ 5*0603839bSHuacai Chen #ifndef _ASM_IRQ_H 6*0603839bSHuacai Chen #define _ASM_IRQ_H 7*0603839bSHuacai Chen 8*0603839bSHuacai Chen #include <linux/irqdomain.h> 9*0603839bSHuacai Chen #include <linux/irqreturn.h> 10*0603839bSHuacai Chen 11*0603839bSHuacai Chen #define IRQ_STACK_SIZE THREAD_SIZE 12*0603839bSHuacai Chen #define IRQ_STACK_START (IRQ_STACK_SIZE - 16) 13*0603839bSHuacai Chen 14*0603839bSHuacai Chen DECLARE_PER_CPU(unsigned long, irq_stack); 15*0603839bSHuacai Chen 16*0603839bSHuacai Chen /* 17*0603839bSHuacai Chen * The highest address on the IRQ stack contains a dummy frame which is 18*0603839bSHuacai Chen * structured as follows: 19*0603839bSHuacai Chen * 20*0603839bSHuacai Chen * top ------------ 21*0603839bSHuacai Chen * | task sp | <- irq_stack[cpu] + IRQ_STACK_START 22*0603839bSHuacai Chen * ------------ 23*0603839bSHuacai Chen * | | <- First frame of IRQ context 24*0603839bSHuacai Chen * ------------ 25*0603839bSHuacai Chen * 26*0603839bSHuacai Chen * task sp holds a copy of the task stack pointer where the struct pt_regs 27*0603839bSHuacai Chen * from exception entry can be found. 28*0603839bSHuacai Chen */ 29*0603839bSHuacai Chen 30*0603839bSHuacai Chen static inline bool on_irq_stack(int cpu, unsigned long sp) 31*0603839bSHuacai Chen { 32*0603839bSHuacai Chen unsigned long low = per_cpu(irq_stack, cpu); 33*0603839bSHuacai Chen unsigned long high = low + IRQ_STACK_SIZE; 34*0603839bSHuacai Chen 35*0603839bSHuacai Chen return (low <= sp && sp <= high); 36*0603839bSHuacai Chen } 37*0603839bSHuacai Chen 38*0603839bSHuacai Chen int get_ipi_irq(void); 39*0603839bSHuacai Chen int get_pmc_irq(void); 40*0603839bSHuacai Chen int get_timer_irq(void); 41*0603839bSHuacai Chen void spurious_interrupt(void); 42*0603839bSHuacai Chen 43*0603839bSHuacai Chen #define NR_IRQS_LEGACY 16 44*0603839bSHuacai Chen 45*0603839bSHuacai Chen #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace 46*0603839bSHuacai Chen void arch_trigger_cpumask_backtrace(const struct cpumask *mask, bool exclude_self); 47*0603839bSHuacai Chen 48*0603839bSHuacai Chen #define MAX_IO_PICS 2 49*0603839bSHuacai Chen #define NR_IRQS (64 + (256 * MAX_IO_PICS)) 50*0603839bSHuacai Chen 51*0603839bSHuacai Chen #define CORES_PER_EIO_NODE 4 52*0603839bSHuacai Chen 53*0603839bSHuacai Chen #define LOONGSON_CPU_UART0_VEC 10 /* CPU UART0 */ 54*0603839bSHuacai Chen #define LOONGSON_CPU_THSENS_VEC 14 /* CPU Thsens */ 55*0603839bSHuacai Chen #define LOONGSON_CPU_HT0_VEC 16 /* CPU HT0 irq vector base number */ 56*0603839bSHuacai Chen #define LOONGSON_CPU_HT1_VEC 24 /* CPU HT1 irq vector base number */ 57*0603839bSHuacai Chen 58*0603839bSHuacai Chen /* IRQ number definitions */ 59*0603839bSHuacai Chen #define LOONGSON_LPC_IRQ_BASE 0 60*0603839bSHuacai Chen #define LOONGSON_LPC_LAST_IRQ (LOONGSON_LPC_IRQ_BASE + 15) 61*0603839bSHuacai Chen 62*0603839bSHuacai Chen #define LOONGSON_CPU_IRQ_BASE 16 63*0603839bSHuacai Chen #define LOONGSON_CPU_LAST_IRQ (LOONGSON_CPU_IRQ_BASE + 14) 64*0603839bSHuacai Chen 65*0603839bSHuacai Chen #define LOONGSON_PCH_IRQ_BASE 64 66*0603839bSHuacai Chen #define LOONGSON_PCH_ACPI_IRQ (LOONGSON_PCH_IRQ_BASE + 47) 67*0603839bSHuacai Chen #define LOONGSON_PCH_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 64 - 1) 68*0603839bSHuacai Chen 69*0603839bSHuacai Chen #define LOONGSON_MSI_IRQ_BASE (LOONGSON_PCH_IRQ_BASE + 64) 70*0603839bSHuacai Chen #define LOONGSON_MSI_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1) 71*0603839bSHuacai Chen 72*0603839bSHuacai Chen #define GSI_MIN_LPC_IRQ LOONGSON_LPC_IRQ_BASE 73*0603839bSHuacai Chen #define GSI_MAX_LPC_IRQ (LOONGSON_LPC_IRQ_BASE + 16 - 1) 74*0603839bSHuacai Chen #define GSI_MIN_CPU_IRQ LOONGSON_CPU_IRQ_BASE 75*0603839bSHuacai Chen #define GSI_MAX_CPU_IRQ (LOONGSON_CPU_IRQ_BASE + 48 - 1) 76*0603839bSHuacai Chen #define GSI_MIN_PCH_IRQ LOONGSON_PCH_IRQ_BASE 77*0603839bSHuacai Chen #define GSI_MAX_PCH_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1) 78*0603839bSHuacai Chen 79*0603839bSHuacai Chen extern int find_pch_pic(u32 gsi); 80*0603839bSHuacai Chen extern int eiointc_get_node(int id); 81*0603839bSHuacai Chen 82*0603839bSHuacai Chen static inline void eiointc_enable(void) 83*0603839bSHuacai Chen { 84*0603839bSHuacai Chen uint64_t misc; 85*0603839bSHuacai Chen 86*0603839bSHuacai Chen misc = iocsr_read64(LOONGARCH_IOCSR_MISC_FUNC); 87*0603839bSHuacai Chen misc |= IOCSR_MISC_FUNC_EXT_IOI_EN; 88*0603839bSHuacai Chen iocsr_write64(misc, LOONGARCH_IOCSR_MISC_FUNC); 89*0603839bSHuacai Chen } 90*0603839bSHuacai Chen 91*0603839bSHuacai Chen struct acpi_madt_lio_pic; 92*0603839bSHuacai Chen struct acpi_madt_eio_pic; 93*0603839bSHuacai Chen struct acpi_madt_ht_pic; 94*0603839bSHuacai Chen struct acpi_madt_bio_pic; 95*0603839bSHuacai Chen struct acpi_madt_msi_pic; 96*0603839bSHuacai Chen struct acpi_madt_lpc_pic; 97*0603839bSHuacai Chen 98*0603839bSHuacai Chen struct irq_domain *loongarch_cpu_irq_init(void); 99*0603839bSHuacai Chen 100*0603839bSHuacai Chen struct irq_domain *liointc_acpi_init(struct irq_domain *parent, 101*0603839bSHuacai Chen struct acpi_madt_lio_pic *acpi_liointc); 102*0603839bSHuacai Chen struct irq_domain *eiointc_acpi_init(struct irq_domain *parent, 103*0603839bSHuacai Chen struct acpi_madt_eio_pic *acpi_eiointc); 104*0603839bSHuacai Chen 105*0603839bSHuacai Chen struct irq_domain *htvec_acpi_init(struct irq_domain *parent, 106*0603839bSHuacai Chen struct acpi_madt_ht_pic *acpi_htvec); 107*0603839bSHuacai Chen struct irq_domain *pch_lpc_acpi_init(struct irq_domain *parent, 108*0603839bSHuacai Chen struct acpi_madt_lpc_pic *acpi_pchlpc); 109*0603839bSHuacai Chen struct irq_domain *pch_msi_acpi_init(struct irq_domain *parent, 110*0603839bSHuacai Chen struct acpi_madt_msi_pic *acpi_pchmsi); 111*0603839bSHuacai Chen struct irq_domain *pch_pic_acpi_init(struct irq_domain *parent, 112*0603839bSHuacai Chen struct acpi_madt_bio_pic *acpi_pchpic); 113*0603839bSHuacai Chen 114*0603839bSHuacai Chen extern struct acpi_madt_lio_pic *acpi_liointc; 115*0603839bSHuacai Chen extern struct acpi_madt_eio_pic *acpi_eiointc[MAX_IO_PICS]; 116*0603839bSHuacai Chen 117*0603839bSHuacai Chen extern struct acpi_madt_ht_pic *acpi_htintc; 118*0603839bSHuacai Chen extern struct acpi_madt_lpc_pic *acpi_pchlpc; 119*0603839bSHuacai Chen extern struct acpi_madt_msi_pic *acpi_pchmsi[MAX_IO_PICS]; 120*0603839bSHuacai Chen extern struct acpi_madt_bio_pic *acpi_pchpic[MAX_IO_PICS]; 121*0603839bSHuacai Chen 122*0603839bSHuacai Chen extern struct irq_domain *cpu_domain; 123*0603839bSHuacai Chen extern struct irq_domain *liointc_domain; 124*0603839bSHuacai Chen extern struct irq_domain *pch_lpc_domain; 125*0603839bSHuacai Chen extern struct irq_domain *pch_msi_domain[MAX_IO_PICS]; 126*0603839bSHuacai Chen extern struct irq_domain *pch_pic_domain[MAX_IO_PICS]; 127*0603839bSHuacai Chen 128*0603839bSHuacai Chen #include <asm-generic/irq.h> 129*0603839bSHuacai Chen 130*0603839bSHuacai Chen #endif /* _ASM_IRQ_H */ 131