/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* 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 OWNER 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 <bsp.h>
#include <bsp/bootcard.h>
#include <bsp/linker-symbols.h>
#include <bsp/start.h>
#include <stm32h7/hal.h>
#include <stm32h7/memory.h>
#include <rtems/score/armv7m.h>
#include <string.h>
void HAL_MspInit(void)
{
__HAL_RCC_SYSCFG_CLK_ENABLE();
}
static void init_power(void)
{
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
__HAL_PWR_VOLTAGESCALING_CONFIG(stm32h7_config_pwr_regulator_voltagescaling);
while (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {
/* Wait */
}
}
static void init_oscillator(void)
{
HAL_StatusTypeDef status;
status = HAL_RCC_OscConfig(&stm32h7_config_oscillator);
if (status != HAL_OK) {
bsp_reset();
}
}
static void init_clocks(void)
{
HAL_StatusTypeDef status;
status = HAL_RCC_ClockConfig(
&stm32h7_config_clocks,
stm32h7_config_flash_latency
);
if (status != HAL_OK) {
bsp_reset();
}
}
static void init_peripheral_clocks(void)
{
HAL_StatusTypeDef status;
status = HAL_RCCEx_PeriphCLKConfig(&stm32h7_config_peripheral_clocks);
if (status != HAL_OK) {
bsp_reset();
}
}
static uint32_t get_region_size(uintptr_t size)
{
if ((size & (size - 1)) == 0) {
return ARMV7M_MPU_RASR_SIZE(30 - __builtin_clz(size));
} else {
return ARMV7M_MPU_RASR_SIZE(31 - __builtin_clz(size));
}
}
static void set_region(
volatile ARMV7M_MPU *mpu,
uint32_t region,
uint32_t rasr,
const void *begin,
const void *end
)
{
uintptr_t size;
uint32_t rbar;
RTEMS_OBFUSCATE_VARIABLE(begin);
RTEMS_OBFUSCATE_VARIABLE(end);
size = (uintptr_t) end - (uintptr_t) begin;
if ( size > 0 ) {
rbar = (uintptr_t) begin | region | ARMV7M_MPU_RBAR_VALID;
rasr |= get_region_size(size);
} else {
rbar = region;
rasr = 0;
}
mpu->rbar = rbar;
mpu->rasr = rasr;
}
static void init_mpu(void)
{
volatile ARMV7M_MPU *mpu;
volatile ARMV7M_SCB *scb;
uint32_t region_count;
uint32_t region;
mpu = _ARMV7M_MPU;
scb = _ARMV7M_SCB;
region_count = ARMV7M_MPU_TYPE_DREGION_GET(mpu->type);
for (region = 0; region < region_count; ++region) {
mpu->rbar = ARMV7M_MPU_RBAR_VALID | region;
mpu->rasr = 0;
}
set_region(
mpu,
0,
ARMV7M_MPU_RASR_XN
| ARMV7M_MPU_RASR_AP(0x3)
| ARMV7M_MPU_RASR_TEX(0x1) | ARMV7M_MPU_RASR_C | ARMV7M_MPU_RASR_B
| ARMV7M_MPU_RASR_ENABLE,
stm32h7_memory_sram_axi_begin,
stm32h7_memory_sram_axi_end
);
set_region(
mpu,
1,
ARMV7M_MPU_RASR_XN
| ARMV7M_MPU_RASR_AP(0x3)
| ARMV7M_MPU_RASR_TEX(0x1) | ARMV7M_MPU_RASR_C | ARMV7M_MPU_RASR_B
| ARMV7M_MPU_RASR_ENABLE,
stm32h7_memory_sdram_1_begin,
stm32h7_memory_sdram_1_end
);
set_region(
mpu,
2,
ARMV7M_MPU_RASR_AP(0x5)
| ARMV7M_MPU_RASR_TEX(0x1) | ARMV7M_MPU_RASR_C | ARMV7M_MPU_RASR_B
| ARMV7M_MPU_RASR_ENABLE,
bsp_section_start_begin,
bsp_section_text_end
);
set_region(
mpu,
3,
ARMV7M_MPU_RASR_XN
| ARMV7M_MPU_RASR_AP(0x5)
| ARMV7M_MPU_RASR_TEX(0x1) | ARMV7M_MPU_RASR_C | ARMV7M_MPU_RASR_B
| ARMV7M_MPU_RASR_ENABLE,
bsp_section_rodata_begin,
bsp_section_rodata_end
);
set_region(
mpu,
4,
ARMV7M_MPU_RASR_XN
| ARMV7M_MPU_RASR_AP(0x3)
| ARMV7M_MPU_RASR_TEX(0x2)
| ARMV7M_MPU_RASR_ENABLE,
bsp_section_nocache_begin,
bsp_section_nocachenoload_end
);
set_region(
mpu,
region - 1,
ARMV7M_MPU_RASR_XN | ARMV7M_MPU_RASR_ENABLE,
stm32h7_memory_null_begin,
stm32h7_memory_null_end
);
mpu->ctrl = ARMV7M_MPU_CTRL_ENABLE | ARMV7M_MPU_CTRL_PRIVDEFENA;
scb->shcsr |= ARMV7M_SCB_SHCSR_MEMFAULTENA;
_ARM_Data_synchronization_barrier();
_ARM_Instruction_synchronization_barrier();
}
void bsp_start_hook_0(void)
{
if ((RCC->AHB3ENR & RCC_AHB3ENR_FMCEN) == 0) {
/*
* Only perform the low-level initialization if necessary. An initialized
* FMC indicates that a boot loader already performed the low-level
* initialization.
*/
SystemInit();
init_power();
init_oscillator();
init_clocks();
init_peripheral_clocks();
HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_1);
HAL_Init();
SystemInit_ExtMemCtl();
}
if ((SCB->CCR & SCB_CCR_IC_Msk) == 0) {
SCB_EnableICache();
}
if ((SCB->CCR & SCB_CCR_DC_Msk) == 0) {
SCB_EnableDCache();
}
init_mpu();
}
void bsp_start_hook_1(void)
{
bsp_start_copy_sections_compact();
SCB_CleanDCache();
SCB_InvalidateICache();
bsp_start_clear_bss();
}