66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/*
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* Copyright (c) 2017 Intel Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <toolchain.h>
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#include <linker/sections.h>
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#include <sw_isr_table.h>
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#include <arch/cpu.h>
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/* There is an additional member at the end populated by the linker script
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* which indicates the number of interrupts specified
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*/
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struct int_list_header {
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u32_t table_size;
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u32_t offset;
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};
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/* These values are not included in the resulting binary, but instead form the
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* header of the initList section, which is used by gen_isr_tables.py to create
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* the vector and sw isr tables,
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*/
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Z_GENERIC_SECTION(.irq_info) struct int_list_header _iheader = {
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.table_size = IRQ_TABLE_SIZE,
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.offset = CONFIG_GEN_IRQ_START_VECTOR,
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};
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/* These are placeholder tables. They will be replaced by the real tables
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* generated by gen_isr_tables.py.
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*
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* z_irq_spurious is used as a placeholder value to ensure that it is not
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* optimized out in the first linker pass. The first linker pass must contain
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* the same symbols as the second linker pass for the code generation to work.
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*/
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/* Some arches don't use a vector table, they have a common exception entry
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* point for all interrupts. Don't generate a table in this case.
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*/
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#ifdef CONFIG_GEN_IRQ_VECTOR_TABLE
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/* When both the IRQ vector table and the software ISR table are used, populate
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* the IRQ vector table with the common software ISR by default, such that all
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* indirect interrupt vectors are handled using the software ISR table;
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* otherwise, populate the IRQ vector table with z_irq_spurious so that all
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* un-connected IRQ vectors end up in the spurious IRQ handler.
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*/
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#ifdef CONFIG_GEN_SW_ISR_TABLE
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#define IRQ_VECTOR_TABLE_DEFAULT_ISR _isr_wrapper
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#else
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#define IRQ_VECTOR_TABLE_DEFAULT_ISR z_irq_spurious
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#endif /* CONFIG_GEN_SW_ISR_TABLE */
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u32_t __irq_vector_table _irq_vector_table[IRQ_TABLE_SIZE] = {
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[0 ...(IRQ_TABLE_SIZE - 1)] = (u32_t)&IRQ_VECTOR_TABLE_DEFAULT_ISR,
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};
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#endif /* CONFIG_GEN_IRQ_VECTOR_TABLE */
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/* If there are no interrupts at all, or all interrupts are of the 'direct'
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* type and bypass the _sw_isr_table, then do not generate one.
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*/
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#ifdef CONFIG_GEN_SW_ISR_TABLE
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struct _isr_table_entry __sw_isr_table _sw_isr_table[IRQ_TABLE_SIZE] = {
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[0 ...(IRQ_TABLE_SIZE - 1)] = {(void *)0x42, (void *)&z_irq_spurious},
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};
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#endif
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