1 /* 2 * Copyright (c) 2017 Intel Corporation. 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #include <toolchain.h> 8 #include <linker/sections.h> 9 #include <sw_isr_table.h> 10 #include <arch/cpu.h> 11 12 /* There is an additional member at the end populated by the linker script 13 * which indicates the number of interrupts specified 14 */ 15 struct int_list_header { 16 uint32_t table_size; 17 uint32_t offset; 18 }; 19 20 /* These values are not included in the resulting binary, but instead form the 21 * header of the initList section, which is used by gen_isr_tables.py to create 22 * the vector and sw isr tables, 23 */ 24 Z_GENERIC_SECTION(.irq_info) struct int_list_header _iheader = { 25 .table_size = IRQ_TABLE_SIZE, 26 .offset = CONFIG_GEN_IRQ_START_VECTOR, 27 }; 28 29 /* These are placeholder tables. They will be replaced by the real tables 30 * generated by gen_isr_tables.py. 31 * 32 * z_irq_spurious is used as a placeholder value to ensure that it is not 33 * optimized out in the first linker pass. The first linker pass must contain 34 * the same symbols as the second linker pass for the code generation to work. 35 */ 36 37 /* Some arches don't use a vector table, they have a common exception entry 38 * point for all interrupts. Don't generate a table in this case. 39 */ 40 #ifdef CONFIG_GEN_IRQ_VECTOR_TABLE 41 /* When both the IRQ vector table and the software ISR table are used, populate 42 * the IRQ vector table with the common software ISR by default, such that all 43 * indirect interrupt vectors are handled using the software ISR table; 44 * otherwise, populate the IRQ vector table with z_irq_spurious so that all 45 * un-connected IRQ vectors end up in the spurious IRQ handler. 46 */ 47 #ifdef CONFIG_GEN_SW_ISR_TABLE 48 #define IRQ_VECTOR_TABLE_DEFAULT_ISR _isr_wrapper 49 #else 50 #define IRQ_VECTOR_TABLE_DEFAULT_ISR z_irq_spurious 51 #endif /* CONFIG_GEN_SW_ISR_TABLE */ 52 53 uintptr_t __irq_vector_table _irq_vector_table[IRQ_TABLE_SIZE] = { 54 [0 ...(IRQ_TABLE_SIZE - 1)] = (uintptr_t)&IRQ_VECTOR_TABLE_DEFAULT_ISR, 55 }; 56 #endif /* CONFIG_GEN_IRQ_VECTOR_TABLE */ 57 58 /* If there are no interrupts at all, or all interrupts are of the 'direct' 59 * type and bypass the _sw_isr_table, then do not generate one. 60 */ 61 #ifdef CONFIG_GEN_SW_ISR_TABLE 62 struct _isr_table_entry __sw_isr_table _sw_isr_table[IRQ_TABLE_SIZE] = { 63 [0 ...(IRQ_TABLE_SIZE - 1)] = {(const void *)0x42, 64 (void *)&z_irq_spurious}, 65 }; 66 #endif 67
