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Diffstat (limited to 'circuitpython/ports/raspberrypi/supervisor/port.c')
| -rw-r--r-- | circuitpython/ports/raspberrypi/supervisor/port.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/circuitpython/ports/raspberrypi/supervisor/port.c b/circuitpython/ports/raspberrypi/supervisor/port.c new file mode 100644 index 0000000..5041250 --- /dev/null +++ b/circuitpython/ports/raspberrypi/supervisor/port.c @@ -0,0 +1,263 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include <string.h> +#include <stdlib.h> + +#include "supervisor/background_callback.h" +#include "supervisor/board.h" +#include "supervisor/port.h" + +#include "bindings/rp2pio/StateMachine.h" +#include "genhdr/mpversion.h" +#include "shared-bindings/audiopwmio/PWMAudioOut.h" +#include "shared-bindings/busio/I2C.h" +#include "shared-bindings/busio/SPI.h" +#include "shared-bindings/countio/Counter.h" +#include "shared-bindings/microcontroller/__init__.h" +#include "shared-bindings/rtc/__init__.h" +#include "shared-bindings/pwmio/PWMOut.h" + +#include "common-hal/rtc/RTC.h" +#include "common-hal/busio/UART.h" + +#include "supervisor/shared/safe_mode.h" +#include "supervisor/shared/stack.h" +#include "supervisor/shared/tick.h" + +#include "src/rp2040/hardware_structs/include/hardware/structs/watchdog.h" +#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h" +#include "src/rp2_common/hardware_uart/include/hardware/uart.h" +#include "src/rp2_common/hardware_sync/include/hardware/sync.h" +#include "src/rp2_common/hardware_timer/include/hardware/timer.h" +#include "src/common/pico_time/include/pico/time.h" +#include "src/common/pico_binary_info/include/pico/binary_info.h" + +#include "pico/bootrom.h" +#include "hardware/watchdog.h" + +extern volatile bool mp_msc_enabled; + +STATIC void _tick_callback(uint alarm_num); + +STATIC void _binary_info(void) { + // Binary info readable with `picotool`. + bi_decl(bi_program_name("CircuitPython")); + bi_decl(bi_program_version_string(MICROPY_GIT_TAG)); + bi_decl(bi_program_build_date_string(MICROPY_BUILD_DATE)); + bi_decl(bi_program_url("https://circuitpython.org")); + + bi_decl(bi_program_build_attribute("BOARD=" CIRCUITPY_BOARD_ID)); + // TODO: Add build attribute for debug builds. Needs newer CircuitPython with CIRCUITPY_DEBUG. +} + +extern uint32_t _ld_dtcm_bss_start; +extern uint32_t _ld_dtcm_bss_size; +extern uint32_t _ld_dtcm_data_destination; +extern uint32_t _ld_dtcm_data_size; +extern uint32_t _ld_dtcm_data_flash_copy; +extern uint32_t _ld_itcm_destination; +extern uint32_t _ld_itcm_size; +extern uint32_t _ld_itcm_flash_copy; + +safe_mode_t port_init(void) { + _binary_info(); + // Set brown out. + + // Copy all of the "tightly coupled memory" code and data to run from RAM. + // This lets us use the 16k cache for dynamically used data and code. + // We must do this before we try and call any of its code or load the data. + for (uint32_t i = 0; i < ((size_t)&_ld_itcm_size) / 4; i++) { + (&_ld_itcm_destination)[i] = (&_ld_itcm_flash_copy)[i]; + // Now zero it out to evict the line from the XIP cache. Without this, + // it'll stay in the XIP cache anyway. + (&_ld_itcm_flash_copy)[i] = 0x0; + } + + // Copy all of the data to run from DTCM. + for (uint32_t i = 0; i < ((size_t)&_ld_dtcm_data_size) / 4; i++) { + (&_ld_dtcm_data_destination)[i] = (&_ld_dtcm_data_flash_copy)[i]; + // Now zero it out to evict the line from the XIP cache. Without this, + // it'll stay in the XIP cache anyway. + (&_ld_dtcm_data_flash_copy)[i] = 0x0; + } + + // Clear DTCM bss. + for (uint32_t i = 0; i < ((size_t)&_ld_dtcm_bss_size) / 4; i++) { + (&_ld_dtcm_bss_start)[i] = 0; + } + + // Reset everything into a known state before board_init. + reset_port(); + + // Initialize RTC + common_hal_rtc_init(); + + // For the tick. + hardware_alarm_claim(0); + hardware_alarm_set_callback(0, _tick_callback); + + // Check brownout. + + if (board_requests_safe_mode()) { + return USER_SAFE_MODE; + } + + return NO_SAFE_MODE; +} + +void reset_port(void) { + #if CIRCUITPY_BUSIO + reset_i2c(); + reset_spi(); + reset_uart(); + #endif + + #if CIRCUITPY_COUNTIO + reset_countio(); + #endif + + #if CIRCUITPY_PWMIO + pwmout_reset(); + #endif + + #if CIRCUITPY_RP2PIO + reset_rp2pio_statemachine(); + #endif + + #if CIRCUITPY_RTC + rtc_reset(); + #endif + + #if CIRCUITPY_AUDIOPWMIO + audiopwmout_reset(); + #endif + #if CIRCUITPY_AUDIOCORE + audio_dma_reset(); + #endif + + reset_all_pins(); +} + +void reset_to_bootloader(void) { + reset_usb_boot(0, 0); + while (true) { + } +} + +void reset_cpu(void) { + watchdog_reboot(0, SRAM_END, 0); + watchdog_start_tick(12); + + while (true) { + __wfi(); + } +} + +bool port_has_fixed_stack(void) { + return false; +} + +// From the linker script +extern uint32_t __HeapLimit; +extern uint32_t __StackTop; +uint32_t *port_stack_get_limit(void) { + return &__HeapLimit; +} + +uint32_t *port_stack_get_top(void) { + return &__StackTop; +} + +uint32_t *port_heap_get_bottom(void) { + return port_stack_get_limit(); +} + +uint32_t *port_heap_get_top(void) { + return port_stack_get_top(); +} + +extern uint32_t __scratch_x_start__; +void port_set_saved_word(uint32_t value) { + __scratch_x_start__ = value; +} + +uint32_t port_get_saved_word(void) { + return __scratch_x_start__; +} + +uint64_t port_get_raw_ticks(uint8_t *subticks) { + uint64_t microseconds = time_us_64(); + return 1024 * (microseconds / 1000000) + (microseconds % 1000000) / 977; +} + +STATIC void _tick_callback(uint alarm_num) { + supervisor_tick(); + hardware_alarm_set_target(0, delayed_by_us(get_absolute_time(), 977)); +} + +// Enable 1/1024 second tick. +void port_enable_tick(void) { + hardware_alarm_set_target(0, delayed_by_us(get_absolute_time(), 977)); +} + +// Disable 1/1024 second tick. +void port_disable_tick(void) { + // hardware_alarm_cancel(0); +} + +// This is called by sleep, we ignore it when our ticks are enabled because +// they'll wake us up earlier. If we don't, we'll mess up ticks by overwriting +// the next RTC wake up time. +void port_interrupt_after_ticks(uint32_t ticks) { +} + +void port_idle_until_interrupt(void) { + common_hal_mcu_disable_interrupts(); + if (!background_callback_pending()) { + // TODO: Does not work when board is power-cycled. + // asm volatile ("dsb 0xF" ::: "memory"); + // __wfi(); + } + common_hal_mcu_enable_interrupts(); +} + +/** + * \brief Default interrupt handler for unused IRQs. + */ +extern void HardFault_Handler(void); // provide a prototype to avoid a missing-prototypes diagnostic +__attribute__((used)) void HardFault_Handler(void) { + #ifdef ENABLE_MICRO_TRACE_BUFFER + // Turn off the micro trace buffer so we don't fill it up in the infinite + // loop below. + REG_MTB_MASTER = 0x00000000 + 6; + #endif + + reset_into_safe_mode(HARD_CRASH); + while (true) { + asm ("nop;"); + } +} |