diff options
Diffstat (limited to 'platform/devices/MCIMX7D/startup/system_MCIMX7D_M4.c')
-rw-r--r-- | platform/devices/MCIMX7D/startup/system_MCIMX7D_M4.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/platform/devices/MCIMX7D/startup/system_MCIMX7D_M4.c b/platform/devices/MCIMX7D/startup/system_MCIMX7D_M4.c new file mode 100644 index 0000000..550e4ba --- /dev/null +++ b/platform/devices/MCIMX7D/startup/system_MCIMX7D_M4.c @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * o Redistributions of source code must retain the above copyright notice, this list + * of conditions and the following disclaimer. + * + * o Redistributions in binary form must reproduce the above copyright notice, this + * list of conditions and the following disclaimer in the documentation and/or + * other materials provided with the distribution. + * + * o Neither the name of Freescale Semiconductor, Inc. nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include <stdbool.h> +#include "MCIMX7D_M4.h" + + +/* ---------------------------------------------------------------------------- + -- Vector Table offset + ---------------------------------------------------------------------------- */ +#define VECT_TAB_OFFSET 0x0 + +/* ---------------------------------------------------------------------------- + -- Core clock + ---------------------------------------------------------------------------- */ +uint32_t SystemCoreClock = 240000000; + +/* ---------------------------------------------------------------------------- + -- SystemInit() + ---------------------------------------------------------------------------- */ +void SystemInit(void) +{ + // The Vector table base address is given by linker script. +#if defined(__CC_ARM) + extern uint32_t Image$$ER_m_text$$Base[]; +#else + extern uint32_t __VECTOR_TABLE[]; +#endif + + +#if ((1 == __FPU_PRESENT) && (1 == __FPU_USED)) + SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */ +#endif + + /* M4 core root SYS PLL Div2: 240MHz */ + CCM_TARGET_ROOT1 = 0x11000000; + + /* initialize cache */ + // Enable I_Cache + // Enable D_Cache + + /* relocate vector table */ +#if defined(__CC_ARM) + SCB->VTOR = (uint32_t)Image$$ER_m_text$$Base + VECT_TAB_OFFSET; +#else + SCB->VTOR = (uint32_t)__VECTOR_TABLE + VECT_TAB_OFFSET; +#endif +} + +/* ---------------------------------------------------------------------------- + -- SystemCoreClockUpdate() + ---------------------------------------------------------------------------- */ + +void SystemCoreClockUpdate(void) +{ + SystemCoreClock = 240000000; +} + +/******************************************************************************* + * EOF + ******************************************************************************/ |