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/* 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, int exclude_cpu);
#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];
static inline int get_percpu_irq(int vector)
{
struct irq_domain *d;
d = irq_find_matching_fwnode(cpuintc_handle, DOMAIN_BUS_ANY);
if (d)
return irq_create_mapping(d, vector);
return -EINVAL;
}
#include <asm-generic/irq.h>
#endif /* _ASM_IRQ_H */
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