vf6xx/vector_chipset.c

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/*
 * This file is part of the libopencm3 project.
 *
 * Copyright (C) 2014 Stefan Agner <stefan@agner.ch>
 *
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <libopencm3/cm3/scb.h>
 
static inline void pre_main(void)
{
        /*
         * For Vybrid we need to set the stack pointer manually
         * since the boot ROM has its own stack
         */
        __asm__ (       \
                "ldr sp,=_stack;" \
            );
 
        /* Set Vector Table Offset to our memory based vector table */
        SCB_VTOR = (uint32_t)&vector_table;
 
        /* Enable access to Floating-Point coprocessor. */
        SCB_CPACR |= SCB_CPACR_FULL * (SCB_CPACR_CP10 | SCB_CPACR_CP11);
}