| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 2020-2022 Loongson Technology Corporation Limited |
| */ |
| #ifndef _ASM_IRQ_H |
| #define _ASM_IRQ_H |
| |
| #include <linux/irqdomain.h> |
| #include <linux/irqreturn.h> |
| |
| #define IRQ_STACK_SIZE THREAD_SIZE |
| #define IRQ_STACK_START (IRQ_STACK_SIZE - 16) |
| |
| DECLARE_PER_CPU(unsigned long, irq_stack); |
| |
| /* |
| * The highest address on the IRQ stack contains a dummy frame which is |
| * structured as follows: |
| * |
| * top ------------ |
| * | task sp | <- irq_stack[cpu] + IRQ_STACK_START |
| * ------------ |
| * | | <- First frame of IRQ context |
| * ------------ |
| * |
| * task sp holds a copy of the task stack pointer where the struct pt_regs |
| * from exception entry can be found. |
| */ |
| |
| static inline bool on_irq_stack(int cpu, unsigned long sp) |
| { |
| unsigned long low = per_cpu(irq_stack, cpu); |
| unsigned long high = low + IRQ_STACK_SIZE; |
| |
| return (low <= sp && sp <= high); |
| } |
| |
| void spurious_interrupt(void); |
| |
| #define NR_IRQS_LEGACY 16 |
| |
| #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace |
| void arch_trigger_cpumask_backtrace(const struct cpumask *mask, bool exclude_self); |
| |
| #define MAX_IO_PICS 2 |
| #define NR_IRQS (64 + (256 * MAX_IO_PICS)) |
| |
| struct acpi_vector_group { |
| int node; |
| int pci_segment; |
| struct irq_domain *parent; |
| }; |
| extern struct acpi_vector_group pch_group[MAX_IO_PICS]; |
| extern struct acpi_vector_group msi_group[MAX_IO_PICS]; |
| |
| #define CORES_PER_EIO_NODE 4 |
| |
| #define LOONGSON_CPU_UART0_VEC 10 /* CPU UART0 */ |
| #define LOONGSON_CPU_THSENS_VEC 14 /* CPU Thsens */ |
| #define LOONGSON_CPU_HT0_VEC 16 /* CPU HT0 irq vector base number */ |
| #define LOONGSON_CPU_HT1_VEC 24 /* CPU HT1 irq vector base number */ |
| |
| /* IRQ number definitions */ |
| #define LOONGSON_LPC_IRQ_BASE 0 |
| #define LOONGSON_LPC_LAST_IRQ (LOONGSON_LPC_IRQ_BASE + 15) |
| |
| #define LOONGSON_CPU_IRQ_BASE 16 |
| #define LOONGSON_CPU_LAST_IRQ (LOONGSON_CPU_IRQ_BASE + 14) |
| |
| #define LOONGSON_PCH_IRQ_BASE 64 |
| #define LOONGSON_PCH_ACPI_IRQ (LOONGSON_PCH_IRQ_BASE + 47) |
| #define LOONGSON_PCH_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 64 - 1) |
| |
| #define LOONGSON_MSI_IRQ_BASE (LOONGSON_PCH_IRQ_BASE + 64) |
| #define LOONGSON_MSI_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1) |
| |
| #define GSI_MIN_LPC_IRQ LOONGSON_LPC_IRQ_BASE |
| #define GSI_MAX_LPC_IRQ (LOONGSON_LPC_IRQ_BASE + 16 - 1) |
| #define GSI_MIN_CPU_IRQ LOONGSON_CPU_IRQ_BASE |
| #define GSI_MAX_CPU_IRQ (LOONGSON_CPU_IRQ_BASE + 48 - 1) |
| #define GSI_MIN_PCH_IRQ LOONGSON_PCH_IRQ_BASE |
| #define GSI_MAX_PCH_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1) |
| |
| struct acpi_madt_lio_pic; |
| struct acpi_madt_eio_pic; |
| struct acpi_madt_ht_pic; |
| struct acpi_madt_bio_pic; |
| struct acpi_madt_msi_pic; |
| struct acpi_madt_lpc_pic; |
| |
| int liointc_acpi_init(struct irq_domain *parent, |
| struct acpi_madt_lio_pic *acpi_liointc); |
| int eiointc_acpi_init(struct irq_domain *parent, |
| struct acpi_madt_eio_pic *acpi_eiointc); |
| |
| int htvec_acpi_init(struct irq_domain *parent, |
| struct acpi_madt_ht_pic *acpi_htvec); |
| int pch_lpc_acpi_init(struct irq_domain *parent, |
| struct acpi_madt_lpc_pic *acpi_pchlpc); |
| int pch_msi_acpi_init(struct irq_domain *parent, |
| struct acpi_madt_msi_pic *acpi_pchmsi); |
| int pch_pic_acpi_init(struct irq_domain *parent, |
| struct acpi_madt_bio_pic *acpi_pchpic); |
| int find_pch_pic(u32 gsi); |
| struct fwnode_handle *get_pch_msi_handle(int pci_segment); |
| |
| extern struct acpi_madt_lio_pic *acpi_liointc; |
| extern struct acpi_madt_eio_pic *acpi_eiointc[MAX_IO_PICS]; |
| |
| extern struct acpi_madt_ht_pic *acpi_htintc; |
| extern struct acpi_madt_lpc_pic *acpi_pchlpc; |
| extern struct acpi_madt_msi_pic *acpi_pchmsi[MAX_IO_PICS]; |
| extern struct acpi_madt_bio_pic *acpi_pchpic[MAX_IO_PICS]; |
| |
| extern struct fwnode_handle *cpuintc_handle; |
| extern struct fwnode_handle *liointc_handle; |
| extern struct fwnode_handle *pch_lpc_handle; |
| extern struct fwnode_handle *pch_pic_handle[MAX_IO_PICS]; |
| |
| extern irqreturn_t loongson_ipi_interrupt(int irq, void *dev); |
| |
| #include <asm-generic/irq.h> |
| |
| #endif /* _ASM_IRQ_H */ |