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58 lines
2.2 KiB
58 lines
2.2 KiB
// Copyright 2020 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#include <stdbool.h>
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#include "pw_boot_armv7m/boot.h"
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// Default handler to insert into the ARMv7-M vector table (below).
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// This function exists for convenience. If a device isn't doing what you
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// expect, it might have hit a fault and ended up here.
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static void DefaultFaultHandler(void) {
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while (true) {
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// Wait for debugger to attach.
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}
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}
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// This is the device's interrupt vector table. It's not referenced in any
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// code because the platform (STM32F4xx) expects this table to be present at the
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// beginning of flash. The exact address is specified in the pw_boot_armv7m
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// configuration as part of the target config.
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//
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// For more information, see ARMv7-M Architecture Reference Manual DDI 0403E.b
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// section B1.5.3.
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// This typedef is for convenience when building the vector table. With the
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// exception of SP_main (0th entry in the vector table), all the entries of the
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// vector table are function pointers.
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typedef void (*InterruptHandler)(void);
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PW_KEEP_IN_SECTION(".vector_table")
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const InterruptHandler vector_table[] = {
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// The starting location of the stack pointer.
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// This address is NOT an interrupt handler/function pointer, it is simply
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// the address that the main stack pointer should be initialized to. The
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// value is reinterpret casted because it needs to be in the vector table.
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[0] = (InterruptHandler)(&pw_boot_stack_high_addr),
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// Reset handler, dictates how to handle reset interrupt. This is the
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// address that the Program Counter (PC) is initialized to at boot.
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[1] = pw_boot_Entry,
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// NMI handler.
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[2] = DefaultFaultHandler,
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// HardFault handler.
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[3] = DefaultFaultHandler,
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};
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