blob: 5e1ec21c07547cfc8195b7e0abf986942e8c74bd [file] [log] [blame]
/*
* Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*/
/* Include esp-idf headers first to avoid redefining BIT() macro */
#include "soc.h"
#include <soc/rtc_cntl_reg.h>
#include <soc/timer_group_reg.h>
#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
#include <xtensa/config/core-isa.h>
#include <xtensa/corebits.h>
#include <zephyr/kernel_structs.h>
#include <kernel_internal.h>
#include <string.h>
#include <zephyr/toolchain.h>
#include <zephyr/types.h>
#include "esp_private/system_internal.h"
#include "esp32s2/rom/cache.h"
#include "soc/gpio_periph.h"
#include "esp_spi_flash.h"
#include "esp_cpu.h"
#include "hal/cpu_ll.h"
#include "hal/soc_ll.h"
#include "hal/wdt_hal.h"
#include "esp_timer.h"
#include "esp_err.h"
#include "esp32s2/spiram.h"
#include "esp_clk_internal.h"
#include <zephyr/sys/printk.h>
#ifdef CONFIG_MCUBOOT
#include "bootloader_init.h"
#endif /* CONFIG_MCUBOOT */
extern void rtc_clk_cpu_freq_set_xtal(void);
extern void esp_reset_reason_init(void);
#if CONFIG_ESP_SPIRAM
extern int _ext_ram_bss_start;
extern int _ext_ram_bss_end;
#endif
/*
* This is written in C rather than assembly since, during the port bring up,
* Zephyr is being booted by the Espressif bootloader. With it, the C stack
* is already set up.
*/
void __attribute__((section(".iram1"))) __esp_platform_start(void)
{
extern uint32_t _init_start;
/* Move the exception vector table to IRAM. */
__asm__ __volatile__ (
"wsr %0, vecbase"
:
: "r"(&_init_start));
/* Zero out BSS */
z_bss_zero();
/*
* Configure the mode of instruction cache :
* cache size, cache associated ways, cache line size.
*/
esp_config_instruction_cache_mode();
/*
* If we need use SPIRAM, we should use data cache, or if we want to
* access rodata, we also should use data cache.
* Configure the mode of data : cache size, cache associated ways, cache
* line size.
* Enable data cache, so if we don't use SPIRAM, it just works.
*/
#if CONFIG_ESP_SPIRAM
esp_config_data_cache_mode();
esp_rom_Cache_Enable_DCache(0);
#endif
/* Disable normal interrupts. */
__asm__ __volatile__ (
"wsr %0, PS"
:
: "r"(PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM | PS_WOE));
/* Initialize the architecture CPU pointer. Some of the
* initialization code wants a valid _current before
* arch_kernel_init() is invoked.
*/
__asm__ volatile("wsr.MISC0 %0; rsync" : : "r"(&_kernel.cpus[0]));
esp_reset_reason_init();
#ifdef CONFIG_MCUBOOT
/* MCUboot early initialisation. */
if (bootloader_init()) {
abort();
}
#else
/* ESP-IDF 2nd stage bootloader enables RTC WDT to check on startup sequence
* related issues in application. Hence disable that as we are about to start
* Zephyr environment.
*/
wdt_hal_context_t rtc_wdt_ctx = {.inst = WDT_RWDT, .rwdt_dev = &RTCCNTL};
wdt_hal_write_protect_disable(&rtc_wdt_ctx);
wdt_hal_disable(&rtc_wdt_ctx);
wdt_hal_write_protect_enable(&rtc_wdt_ctx);
/* Configures the CPU clock, RTC slow and fast clocks, and performs
* RTC slow clock calibration.
*/
esp_clk_init();
esp_timer_early_init();
#if CONFIG_ESP_SPIRAM
memset(&_ext_ram_bss_start,
0,
(&_ext_ram_bss_end - &_ext_ram_bss_start) * sizeof(_ext_ram_bss_start));
esp_err_t err = esp_spiram_init();
if (err != ESP_OK) {
printk("Failed to Initialize SPIRAM, aborting.\n");
abort();
}
esp_spiram_init_cache();
if (esp_spiram_get_size() < CONFIG_ESP_SPIRAM_SIZE) {
printk("SPIRAM size is less than configured size, aborting.\n");
abort();
}
#endif /* CONFIG_ESP_SPIRAM */
/* Scheduler is not started at this point. Hence, guard functions
* must be initialized after esp_spiram_init_cache which internally
* uses guard functions. Setting guard functions before SPIRAM
* cache initialization will result in a crash.
*/
#if CONFIG_SOC_FLASH_ESP32 || CONFIG_ESP_SPIRAM
spi_flash_guard_set(&g_flash_guard_default_ops);
#endif
#endif /* CONFIG_MCUBOOT */
esp_intr_initialize();
/* Start Zephyr */
z_cstart();
CODE_UNREACHABLE;
}
/* Boot-time static default printk handler, possibly to be overridden later. */
int IRAM_ATTR arch_printk_char_out(int c)
{
if (c == '\n') {
esp_rom_uart_tx_one_char('\r');
}
esp_rom_uart_tx_one_char(c);
return 0;
}
void sys_arch_reboot(int type)
{
esp_restart_noos();
}
void IRAM_ATTR esp_restart_noos(void)
{
/* Disable interrupts */
z_xt_ints_off(0xFFFFFFFF);
/*
* Reset and stall the other CPU.
* CPU must be reset before stalling, in case it was running a s32c1i
* instruction. This would cause memory pool to be locked by arbiter
* to the stalled CPU, preventing current CPU from accessing this pool.
*/
const uint32_t core_id = cpu_ll_get_core_id();
/* Flush any data left in UART FIFOs */
esp_rom_uart_tx_wait_idle(0);
esp_rom_uart_tx_wait_idle(1);
/* Disable cache */
esp_rom_Cache_Disable_ICache();
esp_rom_Cache_Disable_DCache();
/*
* 2nd stage bootloader reconfigures SPI flash signals.
* Reset them to the defaults expected by ROM
*/
WRITE_PERI_REG(GPIO_FUNC0_IN_SEL_CFG_REG, 0x30);
WRITE_PERI_REG(GPIO_FUNC1_IN_SEL_CFG_REG, 0x30);
WRITE_PERI_REG(GPIO_FUNC2_IN_SEL_CFG_REG, 0x30);
WRITE_PERI_REG(GPIO_FUNC3_IN_SEL_CFG_REG, 0x30);
WRITE_PERI_REG(GPIO_FUNC4_IN_SEL_CFG_REG, 0x30);
WRITE_PERI_REG(GPIO_FUNC5_IN_SEL_CFG_REG, 0x30);
/* Reset wifi/ethernet/sdio (bb/mac) */
DPORT_SET_PERI_REG_MASK(DPORT_CORE_RST_EN_REG,
DPORT_BB_RST | DPORT_FE_RST | DPORT_MAC_RST | DPORT_BT_RST |
DPORT_BTMAC_RST | DPORT_SDIO_RST | DPORT_SDIO_RST |
DPORT_SDIO_HOST_RST | DPORT_EMAC_RST | DPORT_MACPWR_RST |
DPORT_RW_BTMAC_RST | DPORT_RW_BTLP_RST);
DPORT_REG_WRITE(DPORT_CORE_RST_EN_REG, 0);
/* Reset timer/spi/uart */
DPORT_SET_PERI_REG_MASK(
DPORT_PERIP_RST_EN_REG,
DPORT_TIMERS_RST | DPORT_SPI01_RST | DPORT_SPI2_RST |
DPORT_SPI3_RST | DPORT_SPI2_DMA_RST | DPORT_SPI3_DMA_RST |
DPORT_UART_RST);
DPORT_REG_WRITE(DPORT_PERIP_RST_EN_REG, 0);
/* Reset CPUs */
if (core_id == 0) {
soc_ll_reset_core(0);
}
while (true) {
;
}
}