| /* |
| * Copyright (c) 2019 - 2020 Nordic Semiconductor ASA |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #if defined(CONFIG_CPU_CORTEX_M_HAS_VTOR) |
| /* |
| * In an MCU with VTOR, the VTOR.TBLOFF is set to the start address of the |
| * exc_vector_table (i.e. _vector_start) during initialization. Therefore, |
| * exc_vector_table must respect the alignment requirements of VTOR.TBLOFF |
| * described below. |
| */ |
| |
| #if defined(CONFIG_ARMV6_M_ARMV8_M_BASELINE) |
| /* VTOR bits 0:7 are reserved (RES0). This requires that the base address |
| * of the vector table is 64-word aligned. |
| */ |
| . = ALIGN( 1 << LOG2CEIL(4 * 64) ); |
| #elif defined(CONFIG_ARMV7_M_ARMV8_M_MAINLINE) |
| /* VTOR bits 0:6 are reserved (RES0). This requires that the base address |
| * of the vector table is 32-word aligned. |
| */ |
| . = ALIGN( 1 << LOG2CEIL(4 * 32) ); |
| #else |
| #error "Unsupported architecture variant" |
| #endif |
| |
| /* When setting TBLOFF in VTOR we must align the offset to the number of |
| * exception entries in the vector table. The minimum alignment of 32 words |
| * is sufficient for the 16 ARM Core exceptions and up to 16 HW interrupts. |
| * For more than 16 HW interrupts, we adjust the alignment by rounding up |
| * to the next power of two; this restriction guarantees a functional VTOR |
| * setting in any Cortex-M implementation (might not be required in every |
| * Cortex-M processor). |
| */ |
| . = ALIGN( 1 << LOG2CEIL(4 * (16 + CONFIG_NUM_IRQS)) ); |
| #endif |
| |
| #ifdef CONFIG_ARM_ZIMAGE_HEADER |
| /* |
| * For AArch32 (A/R), VBAR has Bits [4:0] = RES0. |
| * For AArch32 (M), VTOR has Bits [6:0] = RES0. Thus, vector start address |
| * should be aligned in such a way so that it satisfies the requirements of |
| * VBAR and VTOR ie Bits [6:0] = 0. |
| */ |
| . = ALIGN( 0x80 ); |
| #endif |
| |
| _vector_start = .; |
| KEEP(*(.exc_vector_table)) |
| KEEP(*(".exc_vector_table.*")) |
| |
| #if LINKER_ZEPHYR_FINAL && defined(CONFIG_ISR_TABLES_LOCAL_DECLARATION) |
| INCLUDE isr_tables_vt.ld |
| #else |
| KEEP(*(.vectors)) |
| #endif |
| |
| _vector_end = .; |