[linux-2.6-block.git] / arch / loongarch / include / asm / irq.h

/* 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);

struct irq_domain *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 loongson3_ipi_interrupt(int irq, void *dev);

#include <asm-generic/irq.h>

#endif /* _ASM_IRQ_H */
Commit	Line	Data
0603839b HC	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
0603839b HC	38	void spurious_interrupt(void);
	39
	40	#define NR_IRQS_LEGACY 16
	41
	42	#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
	43	void arch_trigger_cpumask_backtrace(const struct cpumask *mask, bool exclude_self);
	44
	45	#define MAX_IO_PICS 2
	46	#define NR_IRQS (64 + (256 * MAX_IO_PICS))
	47
2dfded47 JL	48	struct acpi_vector_group {
	49	int node;
	50	int pci_segment;
	51	struct irq_domain *parent;
	52	};
	53	extern struct acpi_vector_group pch_group[MAX_IO_PICS];
	54	extern struct acpi_vector_group msi_group[MAX_IO_PICS];
	55
0603839b HC	56	#define CORES_PER_EIO_NODE 4
	57
	58	#define LOONGSON_CPU_UART0_VEC 10 /* CPU UART0 */
	59	#define LOONGSON_CPU_THSENS_VEC 14 /* CPU Thsens */
	60	#define LOONGSON_CPU_HT0_VEC 16 /* CPU HT0 irq vector base number */
	61	#define LOONGSON_CPU_HT1_VEC 24 /* CPU HT1 irq vector base number */
	62
	63	/* IRQ number definitions */
	64	#define LOONGSON_LPC_IRQ_BASE 0
	65	#define LOONGSON_LPC_LAST_IRQ (LOONGSON_LPC_IRQ_BASE + 15)
	66
	67	#define LOONGSON_CPU_IRQ_BASE 16
	68	#define LOONGSON_CPU_LAST_IRQ (LOONGSON_CPU_IRQ_BASE + 14)
	69
	70	#define LOONGSON_PCH_IRQ_BASE 64
	71	#define LOONGSON_PCH_ACPI_IRQ (LOONGSON_PCH_IRQ_BASE + 47)
	72	#define LOONGSON_PCH_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 64 - 1)
	73
	74	#define LOONGSON_MSI_IRQ_BASE (LOONGSON_PCH_IRQ_BASE + 64)
	75	#define LOONGSON_MSI_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1)
	76
	77	#define GSI_MIN_LPC_IRQ LOONGSON_LPC_IRQ_BASE
	78	#define GSI_MAX_LPC_IRQ (LOONGSON_LPC_IRQ_BASE + 16 - 1)
	79	#define GSI_MIN_CPU_IRQ LOONGSON_CPU_IRQ_BASE
	80	#define GSI_MAX_CPU_IRQ (LOONGSON_CPU_IRQ_BASE + 48 - 1)
	81	#define GSI_MIN_PCH_IRQ LOONGSON_PCH_IRQ_BASE
	82	#define GSI_MAX_PCH_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1)
	83
0603839b HC	84	struct acpi_madt_lio_pic;
	85	struct acpi_madt_eio_pic;
	86	struct acpi_madt_ht_pic;
	87	struct acpi_madt_bio_pic;
	88	struct acpi_madt_msi_pic;
	89	struct acpi_madt_lpc_pic;
	90
0858ed03	91	int liointc_acpi_init(struct irq_domain *parent,
0603839b	92	struct acpi_madt_lio_pic *acpi_liointc);
dd281e1a	93	int eiointc_acpi_init(struct irq_domain *parent,
0603839b HC	94	struct acpi_madt_eio_pic *acpi_eiointc);
	95
	96	struct irq_domain htvec_acpi_init(struct irq_domain parent,
	97	struct acpi_madt_ht_pic *acpi_htvec);
ee73f14e	98	int pch_lpc_acpi_init(struct irq_domain *parent,
0603839b	99	struct acpi_madt_lpc_pic *acpi_pchlpc);
02308732	100	int pch_msi_acpi_init(struct irq_domain *parent,
0603839b	101	struct acpi_madt_msi_pic *acpi_pchmsi);
bcdd75c5	102	int pch_pic_acpi_init(struct irq_domain *parent,
0603839b	103	struct acpi_madt_bio_pic *acpi_pchpic);
bcdd75c5	104	int find_pch_pic(u32 gsi);
02308732	105	struct fwnode_handle *get_pch_msi_handle(int pci_segment);
0603839b HC	106
	107	extern struct acpi_madt_lio_pic *acpi_liointc;
	108	extern struct acpi_madt_eio_pic *acpi_eiointc[MAX_IO_PICS];
	109
	110	extern struct acpi_madt_ht_pic *acpi_htintc;
	111	extern struct acpi_madt_lpc_pic *acpi_pchlpc;
	112	extern struct acpi_madt_msi_pic *acpi_pchmsi[MAX_IO_PICS];
	113	extern struct acpi_madt_bio_pic *acpi_pchpic[MAX_IO_PICS];
	114
b2d3e335	115	extern struct fwnode_handle *cpuintc_handle;
0858ed03	116	extern struct fwnode_handle *liointc_handle;
ee73f14e	117	extern struct fwnode_handle *pch_lpc_handle;
bcdd75c5	118	extern struct fwnode_handle *pch_pic_handle[MAX_IO_PICS];
0603839b	119
46859ac8 HC	120	extern irqreturn_t loongson3_ipi_interrupt(int irq, void *dev);
46859ac8 HC	121
0603839b HC	122	#include <asm-generic/irq.h>
	123
	124	#endif /* _ASM_IRQ_H */