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Linux kernel mirror (for testing)
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linux
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
38void spurious_interrupt(void);
39
40#define NR_IRQS_LEGACY 16
41
42/*
43 * 256 Vectors Mapping for AVECINTC:
44 *
45 * 0 - 15: Mapping classic IPs, e.g. IP0-12.
46 * 16 - 255: Mapping vectors for external IRQ.
47 *
48 */
49#define NR_VECTORS 256
50#define NR_LEGACY_VECTORS 16
51#define IRQ_MATRIX_BITS NR_VECTORS
52
53#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
54void arch_trigger_cpumask_backtrace(const struct cpumask *mask, int exclude_cpu);
55
56#define MAX_IO_PICS 2
57#define NR_IRQS (64 + NR_VECTORS * (NR_CPUS + MAX_IO_PICS))
58
59struct acpi_vector_group {
60 int node;
61 int pci_segment;
62 struct irq_domain *parent;
63};
64extern struct acpi_vector_group pch_group[MAX_IO_PICS];
65extern struct acpi_vector_group msi_group[MAX_IO_PICS];
66
67#define CORES_PER_EIO_NODE 4
68#define CORES_PER_VEIO_NODE 256
69
70#define LOONGSON_CPU_UART0_VEC 10 /* CPU UART0 */
71#define LOONGSON_CPU_THSENS_VEC 14 /* CPU Thsens */
72#define LOONGSON_CPU_HT0_VEC 16 /* CPU HT0 irq vector base number */
73#define LOONGSON_CPU_HT1_VEC 24 /* CPU HT1 irq vector base number */
74
75/* IRQ number definitions */
76#define LOONGSON_LPC_IRQ_BASE 0
77#define LOONGSON_LPC_LAST_IRQ (LOONGSON_LPC_IRQ_BASE + 15)
78
79#define LOONGSON_CPU_IRQ_BASE 16
80#define LOONGSON_CPU_LAST_IRQ (LOONGSON_CPU_IRQ_BASE + 15)
81
82#define LOONGSON_PCH_IRQ_BASE 64
83#define LOONGSON_PCH_ACPI_IRQ (LOONGSON_PCH_IRQ_BASE + 47)
84#define LOONGSON_PCH_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 64 - 1)
85
86#define LOONGSON_MSI_IRQ_BASE (LOONGSON_PCH_IRQ_BASE + 64)
87#define LOONGSON_MSI_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1)
88
89#define GSI_MIN_LPC_IRQ LOONGSON_LPC_IRQ_BASE
90#define GSI_MAX_LPC_IRQ (LOONGSON_LPC_IRQ_BASE + 16 - 1)
91#define GSI_MIN_CPU_IRQ LOONGSON_CPU_IRQ_BASE
92#define GSI_MAX_CPU_IRQ (LOONGSON_CPU_IRQ_BASE + 48 - 1)
93#define GSI_MIN_PCH_IRQ LOONGSON_PCH_IRQ_BASE
94#define GSI_MAX_PCH_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1)
95
96struct acpi_madt_lio_pic;
97struct acpi_madt_eio_pic;
98struct acpi_madt_ht_pic;
99struct acpi_madt_bio_pic;
100struct acpi_madt_msi_pic;
101struct acpi_madt_lpc_pic;
102
103void complete_irq_moving(void);
104
105struct fwnode_handle *get_pch_msi_handle(int pci_segment);
106
107extern struct acpi_madt_lio_pic *acpi_liointc;
108extern struct acpi_madt_eio_pic *acpi_eiointc[MAX_IO_PICS];
109
110extern struct acpi_madt_ht_pic *acpi_htintc;
111extern struct acpi_madt_lpc_pic *acpi_pchlpc;
112extern struct acpi_madt_msi_pic *acpi_pchmsi[MAX_IO_PICS];
113extern struct acpi_madt_bio_pic *acpi_pchpic[MAX_IO_PICS];
114
115extern struct fwnode_handle *cpuintc_handle;
116extern struct fwnode_handle *liointc_handle;
117extern struct fwnode_handle *pch_lpc_handle;
118extern struct fwnode_handle *pch_pic_handle[MAX_IO_PICS];
119
120static inline int get_percpu_irq(int vector)
121{
122 struct irq_domain *d;
123
124 d = irq_find_matching_fwnode(cpuintc_handle, DOMAIN_BUS_ANY);
125 if (d)
126 return irq_create_mapping(d, vector);
127
128 return -EINVAL;
129}
130
131#include <asm-generic/irq.h>
132
133#endif /* _ASM_IRQ_H */