1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
8 #include <linux/irqdomain.h>
9 #include <linux/irqreturn.h>
11 #define IRQ_STACK_SIZE THREAD_SIZE
12 #define IRQ_STACK_START (IRQ_STACK_SIZE - 16)
14 DECLARE_PER_CPU(unsigned long, irq_stack);
17 * The highest address on the IRQ stack contains a dummy frame which is
18 * structured as follows:
21 * | task sp | <- irq_stack[cpu] + IRQ_STACK_START
23 * | | <- First frame of IRQ context
26 * task sp holds a copy of the task stack pointer where the struct pt_regs
27 * from exception entry can be found.
30 static inline bool on_irq_stack(int cpu, unsigned long sp)
32 unsigned long low = per_cpu(irq_stack, cpu);
33 unsigned long high = low + IRQ_STACK_SIZE;
35 return (low <= sp && sp <= high);
38 int get_ipi_irq(void);
39 int get_pmc_irq(void);
40 int get_timer_irq(void);
41 void spurious_interrupt(void);
43 #define NR_IRQS_LEGACY 16
45 #define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
46 void arch_trigger_cpumask_backtrace(const struct cpumask *mask, bool exclude_self);
49 #define NR_IRQS (64 + (256 * MAX_IO_PICS))
51 struct acpi_vector_group {
54 struct irq_domain *parent;
56 extern struct acpi_vector_group pch_group[MAX_IO_PICS];
57 extern struct acpi_vector_group msi_group[MAX_IO_PICS];
59 #define CORES_PER_EIO_NODE 4
61 #define LOONGSON_CPU_UART0_VEC 10 /* CPU UART0 */
62 #define LOONGSON_CPU_THSENS_VEC 14 /* CPU Thsens */
63 #define LOONGSON_CPU_HT0_VEC 16 /* CPU HT0 irq vector base number */
64 #define LOONGSON_CPU_HT1_VEC 24 /* CPU HT1 irq vector base number */
66 /* IRQ number definitions */
67 #define LOONGSON_LPC_IRQ_BASE 0
68 #define LOONGSON_LPC_LAST_IRQ (LOONGSON_LPC_IRQ_BASE + 15)
70 #define LOONGSON_CPU_IRQ_BASE 16
71 #define LOONGSON_CPU_LAST_IRQ (LOONGSON_CPU_IRQ_BASE + 14)
73 #define LOONGSON_PCH_IRQ_BASE 64
74 #define LOONGSON_PCH_ACPI_IRQ (LOONGSON_PCH_IRQ_BASE + 47)
75 #define LOONGSON_PCH_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 64 - 1)
77 #define LOONGSON_MSI_IRQ_BASE (LOONGSON_PCH_IRQ_BASE + 64)
78 #define LOONGSON_MSI_LAST_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1)
80 #define GSI_MIN_LPC_IRQ LOONGSON_LPC_IRQ_BASE
81 #define GSI_MAX_LPC_IRQ (LOONGSON_LPC_IRQ_BASE + 16 - 1)
82 #define GSI_MIN_CPU_IRQ LOONGSON_CPU_IRQ_BASE
83 #define GSI_MAX_CPU_IRQ (LOONGSON_CPU_IRQ_BASE + 48 - 1)
84 #define GSI_MIN_PCH_IRQ LOONGSON_PCH_IRQ_BASE
85 #define GSI_MAX_PCH_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1)
87 extern int find_pch_pic(u32 gsi);
88 extern int eiointc_get_node(int id);
90 struct acpi_madt_lio_pic;
91 struct acpi_madt_eio_pic;
92 struct acpi_madt_ht_pic;
93 struct acpi_madt_bio_pic;
94 struct acpi_madt_msi_pic;
95 struct acpi_madt_lpc_pic;
97 struct irq_domain *loongarch_cpu_irq_init(void);
99 int liointc_acpi_init(struct irq_domain *parent,
100 struct acpi_madt_lio_pic *acpi_liointc);
101 int eiointc_acpi_init(struct irq_domain *parent,
102 struct acpi_madt_eio_pic *acpi_eiointc);
104 struct irq_domain *htvec_acpi_init(struct irq_domain *parent,
105 struct acpi_madt_ht_pic *acpi_htvec);
106 int pch_lpc_acpi_init(struct irq_domain *parent,
107 struct acpi_madt_lpc_pic *acpi_pchlpc);
108 #if IS_ENABLED(CONFIG_LOONGSON_PCH_MSI)
109 int pch_msi_acpi_init(struct irq_domain *parent,
110 struct acpi_madt_msi_pic *acpi_pchmsi);
112 static inline int pch_msi_acpi_init(struct irq_domain *parent,
113 struct acpi_madt_msi_pic *acpi_pchmsi)
118 int pch_pic_acpi_init(struct irq_domain *parent,
119 struct acpi_madt_bio_pic *acpi_pchpic);
120 int find_pch_pic(u32 gsi);
121 struct fwnode_handle *get_pch_msi_handle(int pci_segment);
123 extern struct acpi_madt_lio_pic *acpi_liointc;
124 extern struct acpi_madt_eio_pic *acpi_eiointc[MAX_IO_PICS];
126 extern struct acpi_madt_ht_pic *acpi_htintc;
127 extern struct acpi_madt_lpc_pic *acpi_pchlpc;
128 extern struct acpi_madt_msi_pic *acpi_pchmsi[MAX_IO_PICS];
129 extern struct acpi_madt_bio_pic *acpi_pchpic[MAX_IO_PICS];
131 extern struct irq_domain *cpu_domain;
132 extern struct fwnode_handle *liointc_handle;
133 extern struct fwnode_handle *pch_lpc_handle;
134 extern struct fwnode_handle *pch_pic_handle[MAX_IO_PICS];
136 extern irqreturn_t loongson3_ipi_interrupt(int irq, void *dev);
138 #include <asm-generic/irq.h>
140 #endif /* _ASM_IRQ_H */