c7404a3ff8
This allows calls to `allocate_memory()` while the VM is running, it will then allocate from the GC heap (unless there is a suitable hole among the supervisor allocations), and when the VM exits and the GC heap is freed, the allocation will be moved to the bottom of the former GC heap and transformed into a proper supervisor allocation. Existing movable allocations will also be moved to defragment the supervisor heap and ensure that the next VM run gets as much memory as possible for the GC heap. By itself this breaks terminalio because it violates the assumption that supervisor_display_move_memory() still has access to an undisturbed heap to copy the tilegrid from. It will work in many cases, but if you're unlucky you will get garbled terminal contents after exiting from the vm run that created the display. This will be fixed in the following commit, which is separate to simplify review.
104 lines
3.5 KiB
C
104 lines
3.5 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) 2016-2017 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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#ifndef MICROPY_INCLUDED_SUPERVISOR_PORT_H
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#define MICROPY_INCLUDED_SUPERVISOR_PORT_H
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#include "py/mpconfig.h"
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#include "supervisor/memory.h"
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#include "supervisor/shared/safe_mode.h"
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// Provided by the linker;
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extern uint32_t _ezero;
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// This file defines core methods that must be implemented by a port.
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extern uint32_t _estack;
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// Stored at the end of the bss section (which includes the heap).
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extern uint32_t _ebss;
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safe_mode_t port_init(void);
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// Reset the microcontroller completely.
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void reset_cpu(void) NORETURN;
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// Reset the microcontroller state.
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void reset_port(void);
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// Reset the rest of the board.
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void reset_board(void);
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// Reset to the bootloader
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void reset_to_bootloader(void) NORETURN;
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// Get stack limit address
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uint32_t *port_stack_get_limit(void);
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// Get stack top address
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uint32_t *port_stack_get_top(void);
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// True if stack is not located inside heap (at the top)
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bool port_has_fixed_stack(void);
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// Get heap bottom address
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uint32_t *port_heap_get_bottom(void);
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// Get heap top address
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uint32_t *port_heap_get_top(void);
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// Save and retrieve a word from memory that is preserved over reset. Used for safe mode.
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void port_set_saved_word(uint32_t);
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uint32_t port_get_saved_word(void);
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// Get the raw tick count since start up. A tick is 1/1024 of a second, a common low frequency
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// clock rate. If subticks is not NULL then the port will fill in the number of subticks where each
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// tick is 32 subticks (for a resolution of 1/32768 or 30.5ish microseconds.)
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uint64_t port_get_raw_ticks(uint8_t* subticks);
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// Enable 1/1024 second tick.
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void port_enable_tick(void);
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// Disable 1/1024 second tick.
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void port_disable_tick(void);
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// Wake the CPU after the given number of ticks or sooner. Only the last call to this will apply.
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// Only the common sleep routine should use it.
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void port_interrupt_after_ticks(uint32_t ticks);
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// Sleep the CPU until an interrupt is received.
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void port_sleep_until_interrupt(void);
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// Execute port specific actions during background tasks.
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void port_background_task(void);
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// Take port specific actions at the beginning and end of background tasks.
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// This is used e.g., to set a monitoring pin for debug purposes. "Actual
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// work" should be done in port_background_task() instead.
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void port_start_background_task(void);
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void port_finish_background_task(void);
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#endif // MICROPY_INCLUDED_SUPERVISOR_PORT_H
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