7d8dac9211
Introduces a way to place CircuitPython code and data into tightly coupled memory (TCM) which is accessible by the CPU in a single cycle. It also frees up room in the corresponding cache for intermittent data. Loading from external flash is slow! The data cache is also now enabled. Adds support for the iMX RT 1021 chip. Adds three new boards: * iMX RT 1020 EVK * iMX RT 1060 EVK * Teensy 4.0 Related to #2492, #2472 and #2477. Fixes #2475.
97 lines
2.9 KiB
C
Executable File
97 lines
2.9 KiB
C
Executable File
/*
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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) 2018 Scott Shawcroft 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 "stack.h"
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#include "py/mpconfig.h"
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#include "py/runtime.h"
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#include "supervisor/cpu.h"
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#include "supervisor/port.h"
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#include "supervisor/shared/safe_mode.h"
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extern uint32_t _estack;
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static uint32_t next_stack_size = CIRCUITPY_DEFAULT_STACK_SIZE;
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static uint32_t current_stack_size = 0;
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supervisor_allocation* stack_alloc = NULL;
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#define EXCEPTION_STACK_SIZE 1024
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void allocate_stack(void) {
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mp_uint_t regs[10];
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mp_uint_t sp = cpu_get_regs_and_sp(regs);
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mp_uint_t c_size = (uint32_t) port_stack_get_top() - sp;
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if (port_stack_get_top() != port_heap_get_top()) {
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return;
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}
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stack_alloc = allocate_memory(c_size + next_stack_size + EXCEPTION_STACK_SIZE, true);
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if (stack_alloc == NULL) {
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stack_alloc = allocate_memory(c_size + CIRCUITPY_DEFAULT_STACK_SIZE + EXCEPTION_STACK_SIZE, true);
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current_stack_size = CIRCUITPY_DEFAULT_STACK_SIZE;
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} else {
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current_stack_size = next_stack_size;
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}
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*stack_alloc->ptr = STACK_CANARY_VALUE;
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}
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inline bool stack_ok(void) {
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return stack_alloc == NULL || *stack_alloc->ptr == STACK_CANARY_VALUE;
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}
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inline void assert_heap_ok(void) {
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if (!stack_ok()) {
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reset_into_safe_mode(HEAP_OVERWRITTEN);
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}
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}
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void stack_init(void) {
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allocate_stack();
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}
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void stack_resize(void) {
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if (stack_alloc == NULL) {
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return;
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}
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if (next_stack_size == current_stack_size) {
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*stack_alloc->ptr = STACK_CANARY_VALUE;
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return;
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}
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free_memory(stack_alloc);
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stack_alloc = NULL;
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allocate_stack();
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}
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void set_next_stack_size(uint32_t size) {
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next_stack_size = size;
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}
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uint32_t get_current_stack_size(void) {
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return current_stack_size;
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}
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