sw_isr_table.h

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/*
 * Copyright (c) 2014, Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_SW_ISR_TABLE_H_
#define ZEPHYR_INCLUDE_SW_ISR_TABLE_H_
 
#if !defined(_ASMLANGUAGE)
#include <zephyr/device.h>
#include <zephyr/types.h>
#include <zephyr/toolchain.h>
#include <zephyr/sys/util.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* Default vector for the IRQ vector table */
void _isr_wrapper(void);
 
/* Spurious interrupt handler. Throws an error if called */
void z_irq_spurious(const void *unused);
 
/*
 * Note the order: arg first, then ISR. This allows a table entry to be
 * loaded arg -> r0, isr -> r3 in _isr_wrapper with one ldmia instruction,
 * on ARM Cortex-M (Thumb2).
 */
struct _isr_table_entry {
        const void *arg;
        void (*isr)(const void *);
};
 
/* The software ISR table itself, an array of these structures indexed by the
 * irq line
 */
extern struct _isr_table_entry _sw_isr_table[];
 
struct _irq_parent_entry {
        const struct device *dev;
        unsigned int irq;
        unsigned int offset;
};
 
/*
 * Data structure created in a special binary .intlist section for each
 * configured interrupt. gen_irq_tables.py pulls this out of the binary and
 * uses it to create the IRQ vector table and the _sw_isr_table.
 *
 * More discussion in include/linker/intlist.ld
 *
 * This is a version used when CONFIG_ISR_TABLES_LOCAL_DECLARATION is disabled.
 * See _isr_list_sname used otherwise.
 */
struct _isr_list {
        int32_t irq;
        int32_t flags;
        void *func;
        const void *param;
};
 
/*
 * Data structure created in a special binary .intlist section for each
 * configured interrupt. gen_isr_tables.py pulls this out of the binary and
 * uses it to create linker script chunks that would place interrupt table entries
 * in the right place in the memory.
 *
 * This is a version used when CONFIG_ISR_TABLES_LOCAL_DECLARATION is enabled.
 * See _isr_list used otherwise.
 */
struct _isr_list_sname {
        int32_t irq;
        int32_t flags;
        const char sname[];
};
 
#ifdef CONFIG_SHARED_INTERRUPTS
struct z_shared_isr_table_entry {
        struct _isr_table_entry clients[CONFIG_SHARED_IRQ_MAX_NUM_CLIENTS];
        size_t client_num;
};
 
void z_shared_isr(const void *data);
 
extern struct z_shared_isr_table_entry z_shared_sw_isr_table[];
#endif /* CONFIG_SHARED_INTERRUPTS */
 
#define ISR_FLAG_DIRECT BIT(0)
 
#define _MK_ISR_NAME(x, y) __MK_ISR_NAME(x, y)
#define __MK_ISR_NAME(x, y) __isr_ ## x ## _irq_ ## y
 
 
#if IS_ENABLED(CONFIG_ISR_TABLES_LOCAL_DECLARATION)
 
#define _MK_ISR_ELEMENT_NAME(func, id) __MK_ISR_ELEMENT_NAME(func, id)
#define __MK_ISR_ELEMENT_NAME(func, id) __isr_table_entry_ ## func ## _irq_ ## id
 
#define _MK_IRQ_ELEMENT_NAME(func, id) __MK_ISR_ELEMENT_NAME(func, id)
#define __MK_IRQ_ELEMENT_NAME(func, id) __irq_table_entry_ ## func ## _irq_ ## id
 
#define _MK_ISR_SECTION_NAME(prefix, file, counter) \
        "." Z_STRINGIFY(prefix)"."file"." Z_STRINGIFY(counter)
 
#define _MK_ISR_ELEMENT_SECTION(counter) _MK_ISR_SECTION_NAME(irq, __FILE__, counter)
#define _MK_IRQ_ELEMENT_SECTION(counter) _MK_ISR_SECTION_NAME(isr, __FILE__, counter)
 
/* Separated macro to create ISR table entry only.
 * Used by Z_ISR_DECLARE and ISR tables generation script.
 */
#define _Z_ISR_TABLE_ENTRY(irq, func, param, sect) \
        static Z_DECL_ALIGN(struct _isr_table_entry)                                      \
                __attribute__((section(sect)))                                            \
                __used _MK_ISR_ELEMENT_NAME(func, __COUNTER__) = {                        \
                        .arg = (const void *)(param),                                     \
                        .isr = (void (*)(const void *))(void *)(func)                     \
        }
 
#define Z_ISR_DECLARE_C(irq, flags, func, param, counter) \
        _Z_ISR_DECLARE_C(irq, flags, func, param, counter)
 
#define _Z_ISR_DECLARE_C(irq, flags, func, param, counter)                                \
        _Z_ISR_TABLE_ENTRY(irq, func, param, _MK_ISR_ELEMENT_SECTION(counter));           \
        static struct _isr_list_sname Z_GENERIC_SECTION(.intList)                         \
                __used _MK_ISR_NAME(func, counter) =                                      \
                {irq, flags, _MK_ISR_ELEMENT_SECTION(counter)}
 
/* Create an entry for _isr_table to be then placed by the linker.
 * An instance of struct _isr_list which gets put in the .intList
 * section is created with the name of the section where _isr_table entry is placed to be then
 * used by isr generation script to create linker script chunk.
 */
#define Z_ISR_DECLARE(irq, flags, func, param)                                            \
        BUILD_ASSERT(((flags) & ISR_FLAG_DIRECT) == 0, "Use Z_ISR_DECLARE_DIRECT macro"); \
        Z_ISR_DECLARE_C(irq, flags, func, param, __COUNTER__)
 
 
/* Separated macro to create ISR Direct table entry only.
 * Used by Z_ISR_DECLARE_DIRECT and ISR tables generation script.
 */
#define _Z_ISR_DIRECT_TABLE_ENTRY(irq, func, sect)                                                 \
        COND_CODE_1(CONFIG_IRQ_VECTOR_TABLE_JUMP_BY_ADDRESS, (                                     \
                        static Z_DECL_ALIGN(uintptr_t)                                             \
                        __attribute__((section(sect)))                                             \
                        __used _MK_IRQ_ELEMENT_NAME(func, __COUNTER__) = ((uintptr_t)(func));      \
                ), (                                                                               \
                        static void __attribute__((section(sect))) __attribute__((naked))          \
                        __used _MK_IRQ_ELEMENT_NAME(func, __COUNTER__)(void) {                     \
                                __asm(ARCH_IRQ_VECTOR_JUMP_CODE(func));                            \
                        }                                                                          \
                ))
 
#define Z_ISR_DECLARE_DIRECT_C(irq, flags, func, counter) \
        _Z_ISR_DECLARE_DIRECT_C(irq, flags, func, counter)
 
#define _Z_ISR_DECLARE_DIRECT_C(irq, flags, func, counter)                                         \
        _Z_ISR_DIRECT_TABLE_ENTRY(irq, func, _MK_IRQ_ELEMENT_SECTION(counter));                    \
        static struct _isr_list_sname Z_GENERIC_SECTION(.intList)                                  \
                __used _MK_ISR_NAME(func, counter) = {                                             \
                        irq,                                                                       \
                        ISR_FLAG_DIRECT | (flags),                                                 \
                        _MK_IRQ_ELEMENT_SECTION(counter)}
 
/* Create an entry to irq table and place it in specific section which name is then placed
 * in an instance of struct _isr_list to be then used by the isr generation script to create
 * the linker script chunks.
 */
#define Z_ISR_DECLARE_DIRECT(irq, flags, func)                                                     \
        BUILD_ASSERT(IS_ENABLED(CONFIG_IRQ_VECTOR_TABLE_JUMP_BY_ADDRESS) ||                        \
                IS_ENABLED(CONFIG_IRQ_VECTOR_TABLE_JUMP_BY_CODE),                                  \
                "CONFIG_IRQ_VECTOR_TABLE_JUMP_BY_{ADDRESS,CODE} not set");                         \
        Z_ISR_DECLARE_DIRECT_C(irq, flags, func, __COUNTER__)
 
 
#else /* IS_ENABLED(CONFIG_ISR_TABLES_LOCAL_DECLARATION) */
 
/* Create an instance of struct _isr_list which gets put in the .intList
 * section. This gets consumed by gen_isr_tables.py which creates the vector
 * and/or SW ISR tables.
 */
#define Z_ISR_DECLARE(irq, flags, func, param) \
        static Z_DECL_ALIGN(struct _isr_list) Z_GENERIC_SECTION(.intList) \
                __used _MK_ISR_NAME(func, __COUNTER__) = \
                        {irq, flags, (void *)&func, (const void *)param}
 
/* The version of the Z_ISR_DECLARE that should be used for direct ISR declaration.
 * It is here for the API match the version with CONFIG_ISR_TABLES_LOCAL_DECLARATION enabled.
 */
#define Z_ISR_DECLARE_DIRECT(irq, flags, func) \
        Z_ISR_DECLARE(irq, ISR_FLAG_DIRECT | (flags), func, NULL)
 
#endif
 
#define IRQ_TABLE_SIZE (CONFIG_NUM_IRQS - CONFIG_GEN_IRQ_START_VECTOR)
 
#ifdef CONFIG_DYNAMIC_INTERRUPTS
void z_isr_install(unsigned int irq, void (*routine)(const void *),
                   const void *param);
 
#ifdef CONFIG_SHARED_INTERRUPTS
int z_isr_uninstall(unsigned int irq, void (*routine)(const void *),
                    const void *param);
#endif /* CONFIG_SHARED_INTERRUPTS */
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif /* _ASMLANGUAGE */
 
#endif /* ZEPHYR_INCLUDE_SW_ISR_TABLE_H_ */