ports: Make new ports/ sub-directory and move all ports there.

This is to keep the top-level directory clean, to make it clear what is
core and what is a port, and to allow the repository to grow with new ports
in a sustainable way.

1 files changed, 0 insertions, 237 deletions

diff --git a/stmhal/pybthread.c b/stmhal/pybthread.c
deleted file mode 100644
index 6baf88f66..000000000
--- a/stmhal/pybthread.c
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * This file is part of the MicroPython project, http://micropython.org/
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2017 Damien P. George
- *
- * 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 <stdio.h>
-
-#include "py/obj.h"
-#include "gccollect.h"
-#include "irq.h"
-#include "pybthread.h"
-
-#if MICROPY_PY_THREAD
-
-#define PYB_MUTEX_UNLOCKED ((void*)0)
-#define PYB_MUTEX_LOCKED ((void*)1)
-
-// These macros are used when we only need to protect against a thread
-// switch; other interrupts are still allowed to proceed.
-#define RAISE_IRQ_PRI() raise_irq_pri(IRQ_PRI_PENDSV)
-#define RESTORE_IRQ_PRI(state) restore_irq_pri(state)
-
-extern void __fatal_error(const char*);
-
-volatile int pyb_thread_enabled;
-pyb_thread_t *volatile pyb_thread_all;
-pyb_thread_t *volatile pyb_thread_cur;
-
-static inline void pyb_thread_add_to_runable(pyb_thread_t *thread) {
-    thread->run_prev = pyb_thread_cur->run_prev;
-    thread->run_next = pyb_thread_cur;
-    pyb_thread_cur->run_prev->run_next = thread;
-    pyb_thread_cur->run_prev = thread;
-}
-
-static inline void pyb_thread_remove_from_runable(pyb_thread_t *thread) {
-    if (thread->run_next == thread) {
-        __fatal_error("deadlock");
-    }
-    thread->run_prev->run_next = thread->run_next;
-    thread->run_next->run_prev = thread->run_prev;
-}
-
-void pyb_thread_init(pyb_thread_t *thread) {
-    pyb_thread_enabled = 0;
-    pyb_thread_all = thread;
-    pyb_thread_cur = thread;
-    thread->sp = NULL; // will be set when this thread switches out
-    thread->local_state = 0; // will be set by mp_thread_init
-    thread->arg = NULL;
-    thread->stack = &_heap_end;
-    thread->stack_len = ((uint32_t)&_estack - (uint32_t)&_heap_end) / sizeof(uint32_t);
-    thread->all_next = NULL;
-    thread->run_prev = thread;
-    thread->run_next = thread;
-    thread->queue_next = NULL;
-}
-
-void pyb_thread_deinit() {
-    uint32_t irq_state = disable_irq();
-    pyb_thread_enabled = 0;
-    pyb_thread_all = pyb_thread_cur;
-    pyb_thread_cur->all_next = NULL;
-    pyb_thread_cur->run_prev = pyb_thread_cur;
-    pyb_thread_cur->run_next = pyb_thread_cur;
-    enable_irq(irq_state);
-}
-
-STATIC void pyb_thread_terminate(void) {
-    uint32_t irq_state = disable_irq();
-    pyb_thread_t *thread = pyb_thread_cur;
-    // take current thread off the run list
-    pyb_thread_remove_from_runable(thread);
-    // take current thread off the list of all threads
-    for (pyb_thread_t **n = (pyb_thread_t**)&pyb_thread_all;; n = &(*n)->all_next) {
-        if (*n == thread) {
-            *n = thread->all_next;
-            break;
-        }
-    }
-    // clean pointers as much as possible to help GC
-    thread->all_next = NULL;
-    thread->queue_next = NULL;
-    thread->stack = NULL;
-    if (pyb_thread_all->all_next == NULL) {
-        // only 1 thread left
-        pyb_thread_enabled = 0;
-    }
-    // thread switch will occur after we enable irqs
-    SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
-    enable_irq(irq_state);
-    // should not return
-    __fatal_error("could not terminate");
-}
-
-uint32_t pyb_thread_new(pyb_thread_t *thread, void *stack, size_t stack_len, void *entry, void *arg) {
-    uint32_t *stack_top = (uint32_t*)stack + stack_len; // stack is full descending
-    *--stack_top = 0x01000000; // xPSR (thumb bit set)
-    *--stack_top = (uint32_t)entry & 0xfffffffe; // pc (must have bit 0 cleared, even for thumb code)
-    *--stack_top = (uint32_t)pyb_thread_terminate; // lr
-    *--stack_top = 0; // r12
-    *--stack_top = 0; // r3
-    *--stack_top = 0; // r2
-    *--stack_top = 0; // r1
-    *--stack_top = (uint32_t)arg; // r0
-    *--stack_top = 0xfffffff9; // lr (return to thread mode, non-FP, use MSP)
-    stack_top -= 8; // r4-r11
-    stack_top -= 16; // s16-s31 (we assume all threads use FP registers)
-    thread->sp = stack_top;
-    thread->local_state = 0;
-    thread->arg = arg;
-    thread->stack = stack;
-    thread->stack_len = stack_len;
-    thread->queue_next = NULL;
-    uint32_t irq_state = disable_irq();
-    pyb_thread_enabled = 1;
-    thread->all_next = pyb_thread_all;
-    pyb_thread_all = thread;
-    pyb_thread_add_to_runable(thread);
-    enable_irq(irq_state);
-    return (uint32_t)thread; // success
-}
-
-void pyb_thread_dump(void) {
-    if (!pyb_thread_enabled) {
-        printf("THREAD: only main thread\n");
-    } else {
-        printf("THREAD:\n");
-        for (pyb_thread_t *th = pyb_thread_all; th != NULL; th = th->all_next) {
-            bool runable = false;
-            for (pyb_thread_t *th2 = pyb_thread_cur;; th2 = th2->run_next) {
-                if (th == th2) {
-                    runable = true;
-                    break;
-                }
-                if (th2->run_next == pyb_thread_cur) {
-                    break;
-                }
-            }
-            printf("    id=%p sp=%p sz=%u", th, th->stack, th->stack_len);
-            if (runable) {
-                printf(" (runable)");
-            }
-            printf("\n");
-        }
-    }
-}
-
-// should only be called from pendsv_isr_handler
-void *pyb_thread_next(void *sp) {
-    pyb_thread_cur->sp = sp;
-    pyb_thread_cur = pyb_thread_cur->run_next;
-    pyb_thread_cur->timeslice = 4; // in milliseconds
-    return pyb_thread_cur->sp;
-}
-
-void pyb_mutex_init(pyb_mutex_t *m) {
-    *m = PYB_MUTEX_UNLOCKED;
-}
-
-int pyb_mutex_lock(pyb_mutex_t *m, int wait) {
-    uint32_t irq_state = RAISE_IRQ_PRI();
-    if (*m == PYB_MUTEX_UNLOCKED) {
-        // mutex is available
-        *m = PYB_MUTEX_LOCKED;
-        RESTORE_IRQ_PRI(irq_state);
-    } else {
-        // mutex is locked
-        if (!wait) {
-            RESTORE_IRQ_PRI(irq_state);
-            return 0; // failed to lock mutex
-        }
-        if (*m == PYB_MUTEX_LOCKED) {
-            *m = pyb_thread_cur;
-        } else {
-            for (pyb_thread_t *n = *m;; n = n->queue_next) {
-                if (n->queue_next == NULL) {
-                    n->queue_next = pyb_thread_cur;
-                    break;
-                }
-            }
-        }
-        pyb_thread_cur->queue_next = NULL;
-        // take current thread off the run list
-        pyb_thread_remove_from_runable(pyb_thread_cur);
-        // thread switch will occur after we enable irqs
-        SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
-        RESTORE_IRQ_PRI(irq_state);
-        // when we come back we have the mutex
-    }
-    return 1; // have mutex
-}
-
-void pyb_mutex_unlock(pyb_mutex_t *m) {
-    uint32_t irq_state = RAISE_IRQ_PRI();
-    if (*m == PYB_MUTEX_LOCKED) {
-        // no threads are blocked on the mutex
-        *m = PYB_MUTEX_UNLOCKED;
-    } else {
-        // at least one thread is blocked on this mutex
-        pyb_thread_t *th = *m;
-        if (th->queue_next == NULL) {
-            // no other threads are blocked
-            *m = PYB_MUTEX_LOCKED;
-        } else {
-            // at least one other thread is still blocked
-            *m = th->queue_next;
-        }
-        // put unblocked thread on runable list
-        pyb_thread_add_to_runable(th);
-    }
-    RESTORE_IRQ_PRI(irq_state);
-}
-
-#endif // MICROPY_PY_THREAD