blob: bcf1aa9ed0460d0ce0dbf76f76c3e9abf3ee4f13 [file] [log] [blame]
/*
* Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <string.h>
#include <platform_def.h>
#include <arch_helpers.h>
#include <common/bl_common.h>
#include <common/debug.h>
#include <common/desc_image_load.h>
#include <drivers/delay_timer.h>
#include <drivers/generic_delay_timer.h>
#include <drivers/st/stm32_console.h>
#include <drivers/st/stm32mp_pmic.h>
#include <drivers/st/stm32mp_reset.h>
#include <drivers/st/stm32mp1_clk.h>
#include <drivers/st/stm32mp1_pwr.h>
#include <drivers/st/stm32mp1_ram.h>
#include <lib/mmio.h>
#include <lib/xlat_tables/xlat_tables_v2.h>
#include <plat/common/platform.h>
#include <stm32mp1_context.h>
static struct console_stm32 console;
static void print_reset_reason(void)
{
uint32_t rstsr = mmio_read_32(RCC_BASE + RCC_MP_RSTSCLRR);
if (rstsr == 0U) {
WARN("Reset reason unknown\n");
return;
}
INFO("Reset reason (0x%x):\n", rstsr);
if ((rstsr & RCC_MP_RSTSCLRR_PADRSTF) == 0U) {
if ((rstsr & RCC_MP_RSTSCLRR_STDBYRSTF) != 0U) {
INFO("System exits from STANDBY\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_CSTDBYRSTF) != 0U) {
INFO("MPU exits from CSTANDBY\n");
return;
}
}
if ((rstsr & RCC_MP_RSTSCLRR_PORRSTF) != 0U) {
INFO(" Power-on Reset (rst_por)\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_BORRSTF) != 0U) {
INFO(" Brownout Reset (rst_bor)\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_MCSYSRSTF) != 0U) {
if ((rstsr & RCC_MP_RSTSCLRR_PADRSTF) != 0U) {
INFO(" System reset generated by MCU (MCSYSRST)\n");
} else {
INFO(" Local reset generated by MCU (MCSYSRST)\n");
}
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_MPSYSRSTF) != 0U) {
INFO(" System reset generated by MPU (MPSYSRST)\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_HCSSRSTF) != 0U) {
INFO(" Reset due to a clock failure on HSE\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_IWDG1RSTF) != 0U) {
INFO(" IWDG1 Reset (rst_iwdg1)\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_IWDG2RSTF) != 0U) {
INFO(" IWDG2 Reset (rst_iwdg2)\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_MPUP0RSTF) != 0U) {
INFO(" MPU Processor 0 Reset\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_MPUP1RSTF) != 0U) {
INFO(" MPU Processor 1 Reset\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_PADRSTF) != 0U) {
INFO(" Pad Reset from NRST\n");
return;
}
if ((rstsr & RCC_MP_RSTSCLRR_VCORERSTF) != 0U) {
INFO(" Reset due to a failure of VDD_CORE\n");
return;
}
ERROR(" Unidentified reset reason\n");
}
void bl2_el3_early_platform_setup(u_register_t arg0,
u_register_t arg1 __unused,
u_register_t arg2 __unused,
u_register_t arg3 __unused)
{
stm32mp_save_boot_ctx_address(arg0);
}
void bl2_platform_setup(void)
{
int ret;
if (dt_check_pmic()) {
initialize_pmic();
}
ret = stm32mp1_ddr_probe();
if (ret < 0) {
ERROR("Invalid DDR init: error %d\n", ret);
panic();
}
INFO("BL2 runs SP_MIN setup\n");
}
void bl2_el3_plat_arch_setup(void)
{
int32_t result;
struct dt_node_info dt_uart_info;
const char *board_model;
boot_api_context_t *boot_context =
(boot_api_context_t *)stm32mp_get_boot_ctx_address();
uint32_t clk_rate;
mmap_add_region(BL_CODE_BASE, BL_CODE_BASE,
BL_CODE_END - BL_CODE_BASE,
MT_CODE | MT_SECURE);
/* Prevent corruption of preloaded BL32 */
mmap_add_region(BL32_BASE, BL32_BASE,
BL32_LIMIT - BL32_BASE,
MT_MEMORY | MT_RO | MT_SECURE);
/* Map non secure DDR for BL33 load and DDR training area restore */
mmap_add_region(STM32MP_DDR_BASE,
STM32MP_DDR_BASE,
STM32MP_DDR_MAX_SIZE,
MT_MEMORY | MT_RW | MT_NS);
/* Prevent corruption of preloaded Device Tree */
mmap_add_region(DTB_BASE, DTB_BASE,
DTB_LIMIT - DTB_BASE,
MT_MEMORY | MT_RO | MT_SECURE);
configure_mmu();
if (dt_open_and_check() < 0) {
panic();
}
/*
* Disable the backup domain write protection.
* The protection is enable at each reset by hardware
* and must be disabled by software.
*/
mmio_setbits_32(PWR_BASE + PWR_CR1, PWR_CR1_DBP);
while ((mmio_read_32(PWR_BASE + PWR_CR1) & PWR_CR1_DBP) == 0U) {
;
}
/* Reset backup domain on cold boot cases */
if ((mmio_read_32(RCC_BASE + RCC_BDCR) & RCC_BDCR_RTCSRC_MASK) == 0U) {
mmio_setbits_32(RCC_BASE + RCC_BDCR, RCC_BDCR_VSWRST);
while ((mmio_read_32(RCC_BASE + RCC_BDCR) & RCC_BDCR_VSWRST) ==
0U) {
;
}
mmio_clrbits_32(RCC_BASE + RCC_BDCR, RCC_BDCR_VSWRST);
}
generic_delay_timer_init();
if (stm32mp1_clk_probe() < 0) {
panic();
}
if (stm32mp1_clk_init() < 0) {
panic();
}
result = dt_get_stdout_uart_info(&dt_uart_info);
if ((result <= 0) ||
(dt_uart_info.status == 0U) ||
(dt_uart_info.clock < 0) ||
(dt_uart_info.reset < 0)) {
goto skip_console_init;
}
if (dt_set_stdout_pinctrl() != 0) {
goto skip_console_init;
}
if (stm32mp_clk_enable((unsigned long)dt_uart_info.clock) != 0) {
goto skip_console_init;
}
stm32mp_reset_assert((uint32_t)dt_uart_info.reset);
udelay(2);
stm32mp_reset_deassert((uint32_t)dt_uart_info.reset);
mdelay(1);
clk_rate = stm32mp_clk_get_rate((unsigned long)dt_uart_info.clock);
if (console_stm32_register(dt_uart_info.base, clk_rate,
STM32MP_UART_BAUDRATE, &console) == 0) {
panic();
}
board_model = dt_get_board_model();
if (board_model != NULL) {
NOTICE("Model: %s\n", board_model);
}
skip_console_init:
if (stm32_save_boot_interface(boot_context->boot_interface_selected,
boot_context->boot_interface_instance) !=
0) {
ERROR("Cannot save boot interface\n");
}
stm32mp1_arch_security_setup();
print_reset_reason();
stm32mp_io_setup();
}