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zephyr/include/zephyr/sw_isr_table.h

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/*
* Copyright (c) 2014, Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief Software-managed ISR table
*
* Data types for a software-managed ISR table, with a parameter per-ISR.
*/
#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 {
/** IRQ line number */
int32_t irq;
/** Flags for this IRQ, see ISR_FLAG_* definitions */
int32_t flags;
/** ISR to call */
void *func;
/** Parameter for non-direct IRQs */
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 {
/** IRQ line number */
int32_t irq;
/** Flags for this IRQ, see ISR_FLAG_* definitions */
int32_t flags;
/** The section name */
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 */
/** This interrupt gets put directly in the vector table */
#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_ */
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