blob: e10a361e4921410ec5f2d8cec121e287daaad97f [file] [log] [blame]
// Copyright 2020 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
// 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 <inttypes.h>
#include "pw_boot_armv7m/boot.h"
#include "pw_malloc/malloc.h"
void pw_PreStaticConstructorInit() {
// TODO(pwbug/17): Optionally enable Replace when Pigweed config system is
// added.
// Enable FPU if built using hardware FPU instructions.
// CPCAR mask that enables FPU. (ARMv7-M Section B3.2.20)
const uint32_t kFpuEnableMask = (0xFu << 20);
// Memory mapped register to enable FPU. (ARMv7-M Section B3.2.2, Table B3-4)
volatile uint32_t* arm_v7m_cpacr = (volatile uint32_t*)0xE000ED88u;
*arm_v7m_cpacr |= kFpuEnableMask;