94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/*
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* Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* Include esp-idf headers first to avoid redefining BIT() macro */
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#include <soc.h>
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#include <soc/rtc_cntl_reg.h>
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#include <soc/timer_group_reg.h>
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#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
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#include <xtensa/config/core-isa.h>
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#include <xtensa/corebits.h>
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#include <zephyr/kernel_structs.h>
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#include <string.h>
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#include <zephyr/toolchain.h>
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#include <zephyr/types.h>
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#include <zephyr/linker/linker-defs.h>
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#include <kernel_internal.h>
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#include <esp_private/system_internal.h>
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#include <esp32s3/rom/cache.h>
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#include <esp32s3/rom/rtc.h>
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#include <soc/syscon_reg.h>
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#include <hal/soc_hal.h>
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#include <hal/wdt_hal.h>
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#include <hal/cpu_hal.h>
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#include <soc/gpio_periph.h>
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#include <esp_cpu.h>
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#include <esp_err.h>
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#include <esp_timer.h>
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#include <esp_app_format.h>
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#include <zephyr/sys/printk.h>
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extern void z_prep_c(void);
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/*
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* This is written in C rather than assembly since, during the port bring up,
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* Zephyr is being booted by the Espressif bootloader. With it, the C stack
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* is already set up.
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*/
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void __app_cpu_start(void)
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{
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extern uint32_t _init_start;
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extern uint32_t _bss_start;
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extern uint32_t _bss_end;
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/* Move the exception vector table to IRAM. */
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__asm__ __volatile__ (
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"wsr %0, vecbase"
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:
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: "r"(&_init_start));
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/* Zero out BSS. Clobber _bss_start to avoid memset() elision. */
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z_bss_zero();
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__asm__ __volatile__ (
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""
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:
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: "g"(&__bss_start)
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: "memory");
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/* Disable normal interrupts. */
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__asm__ __volatile__ (
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"wsr %0, PS"
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:
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: "r"(PS_INTLEVEL(XCHAL_EXCM_LEVEL) | PS_UM | PS_WOE));
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/* Initialize the architecture CPU pointer. Some of the
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* initialization code wants a valid _current before
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* z_prep_c() is invoked.
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*/
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__asm__ __volatile__("wsr.MISC0 %0; rsync" : : "r"(&_kernel.cpus[0]));
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esp_intr_initialize();
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/* Start Zephyr */
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z_prep_c();
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CODE_UNREACHABLE;
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}
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/* Boot-time static default printk handler, possibly to be overridden later. */
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int IRAM_ATTR arch_printk_char_out(int c)
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{
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ARG_UNUSED(c);
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return 0;
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}
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void sys_arch_reboot(int type)
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{
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esp_restart_noos();
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}
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