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Diffstat (limited to 'targets/emcraft_sf2_som/vector_table.c')
-rw-r--r-- | targets/emcraft_sf2_som/vector_table.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/targets/emcraft_sf2_som/vector_table.c b/targets/emcraft_sf2_som/vector_table.c new file mode 100644 index 000000000..a4f5f7fc4 --- /dev/null +++ b/targets/emcraft_sf2_som/vector_table.c @@ -0,0 +1,75 @@ +// Copyright 2022 The Pigweed Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy of +// the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations under +// the License. + +#include <stdbool.h> + +#include "pw_boot/boot.h" +#include "pw_boot_cortex_m/boot.h" +#include "pw_preprocessor/compiler.h" + +// Default handler to insert into the ARMv7-M vector table (below). +// This function exists for convenience. If a device isn't doing what you +// expect, it might have hit a fault and ended up here. +static void DefaultFaultHandler(void) { + while (true) { + // Wait for debugger to attach. + } +} + +// This is the device's interrupt vector table. It's not referenced in any +// code because the platform (SmartFusion) expects this table to be present at +// the beginning of flash. The exact address is specified in the pw_boot_armv7m +// configuration as part of the target config. +// +// For more information, see ARMv7-M Architecture Reference Manual DDI 0403E.b +// section B1.5.3. + +// This typedef is for convenience when building the vector table. With the +// exception of SP_main (0th entry in the vector table), all the entries of the +// vector table are function pointers. +typedef void (*InterruptHandler)(void); + +// Interrupt handlers critical for OS operation. +void SVC_Handler(void); +void PendSV_Handler(void); +void SysTick_Handler(void); + +PW_KEEP_IN_SECTION(".vector_table") +const InterruptHandler vector_table[] = { + // The starting location of the stack pointer. + // This address is NOT an interrupt handler/function pointer, it is simply + // the address that the main stack pointer should be initialized to. The + // value is reinterpret casted because it needs to be in the vector table. + [0] = (InterruptHandler)(&pw_boot_stack_high_addr), + + // Reset handler, dictates how to handle reset interrupt. This is the + // address that the Program Counter (PC) is initialized to at boot. + [1] = pw_boot_Entry, + + // NMI handler. + [2] = DefaultFaultHandler, + // HardFault handler. + [3] = DefaultFaultHandler, + // 4-6: Specialized fault handlers. + // 7-10: Reserved. + // SVCall handler. + [11] = SVC_Handler, + // DebugMon handler. + [12] = DefaultFaultHandler, + // 13: Reserved. + // PendSV handler. + [14] = PendSV_Handler, + // SysTick handler. + [15] = SysTick_Handler, +}; |