8137e2d6d2
This simplifies allocating outside of the VM because the VM doesn't take up all remaining memory by default. On ESP we delegate to the IDF for allocations. For all other ports, we use TLSF to manage an outer "port" heap. The IDF uses TLSF internally and we use their fork for the other ports. This also removes the dynamic C stack sizing. It wasn't often used and is not possible with a fixed outer heap. Fixes #8512. Fixes #7334.
154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
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* Copyright (c) 2019 Lucian Copeland for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h>
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#include "supervisor/board.h"
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#include "supervisor/port.h"
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#include "supervisor/shared/tick.h"
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#include "irq.h"
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#include "csr.h"
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#include "shared-bindings/microcontroller/__init__.h"
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// Global millisecond tick count. 1024 per second because most RTCs are clocked with 32.768khz
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// crystals.
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volatile uint64_t raw_ticks = 0;
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volatile int subsecond = 0;
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void SysTick_Handler(void);
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__attribute__((section(".ramtext")))
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void SysTick_Handler(void) {
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timer0_ev_pending_write(1);
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raw_ticks += 1;
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subsecond += 1;
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// We track subsecond ticks so that we can increment raw_ticks one extra every 40 ms. We do this
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// every 40 except 0 to make it 24 increments and not 25.
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if (subsecond == 1000) {
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subsecond = 0;
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} else if (subsecond % 40 == 0) {
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raw_ticks += 1;
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}
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supervisor_tick();
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}
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static void tick_init(void) {
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int t;
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timer0_en_write(0);
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t = CONFIG_CLOCK_FREQUENCY / 1000; // 1000 kHz tick
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timer0_reload_write(t);
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timer0_load_write(t);
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timer0_en_write(1);
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timer0_ev_enable_write(1);
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timer0_ev_pending_write(1);
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irq_setmask(irq_getmask() | (1 << TIMER0_INTERRUPT));
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}
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safe_mode_t port_init(void) {
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irq_setmask(0);
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irq_setie(1);
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tick_init();
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return SAFE_MODE_NONE;
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}
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extern uint32_t _ebss;
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extern uint32_t _heap_start;
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extern uint32_t _estack;
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void reset_port(void) {
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// reset_all_pins();
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// i2c_reset();
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// spi_reset();
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// uart_reset();
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// pwmout_reset();
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}
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void reset_to_bootloader(void) {
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reboot_ctrl_write(0xac);
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for (;;) {}
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}
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void reset_cpu(void) {
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// "You can reset Fomu by writing a special value to the CSR_REBOOT_CTRL
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// register at 0xe0006000L. All writes to this register must start with
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// 0xac, to ensure random values aren’t written. We can reboot Fomu by
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// simply writing this value" --
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// https://workshop.fomu.im/en/latest/riscv.html
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reboot_ctrl_write(0xac);
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for (;;) {}
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}
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uint32_t *port_heap_get_bottom(void) {
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return &_ebss;
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}
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uint32_t *port_heap_get_top(void) {
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return port_stack_get_limit();
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}
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uint32_t *port_stack_get_limit(void) {
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Warray-bounds"
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return port_stack_get_top() - (CIRCUITPY_DEFAULT_STACK_SIZE + CIRCUITPY_EXCEPTION_STACK_SIZE) / sizeof(uint32_t);
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#pragma GCC diagnostic pop
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}
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uint32_t *port_stack_get_top(void) {
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return &_estack;
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}
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// Place the word to save just after our BSS section that gets blanked.
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void port_set_saved_word(uint32_t value) {
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_ebss = value;
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}
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uint32_t port_get_saved_word(void) {
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return _ebss;
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}
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uint64_t port_get_raw_ticks(uint8_t *subticks) {
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// Reading 64 bits may take two loads, so turn of interrupts while we do it.
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common_hal_mcu_disable_interrupts();
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uint64_t raw_tick_snapshot = raw_ticks;
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common_hal_mcu_enable_interrupts();
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return raw_tick_snapshot;
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}
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// Enable 1/1024 second tick.
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void port_enable_tick(void) {
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}
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// Disable 1/1024 second tick.
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void port_disable_tick(void) {
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}
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void port_interrupt_after_ticks(uint32_t ticks) {
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}
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// TODO: Add sleep support if the SoC supports sleep.
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void port_idle_until_interrupt(void) {
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}
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