head	1.2;
access;
symbols
	micropython-1-5-2-base:1.1.1.1 MICROPYTHON:1.1.1;
locks; strict;
comment	@ * @;


1.2
date	2026.10.15.05.28.48;	author agc;	state dead;
branches;
next	1.1;
commitid	aHLdC1EGCUYk7xZG;

1.1
date	2016.01.14.01.38.50;	author agc;	state Exp;
branches
	1.1.1.1;
next	;
commitid	Q8liT0v6zMF95QQy;

1.1.1.1
date	2016.01.14.01.38.50;	author agc;	state Exp;
branches;
next	;
commitid	Q8liT0v6zMF95QQy;


desc
@@


1.2
log
@Remove waaaay old micropython sources which haven't been relevant for 10 years
@
text
@/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013, 2014 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 <stdlib.h>
#include STM32_HAL_H

#include "py/mpstate.h"
#include "py/runtime.h"
#include "pendsv.h"
#include "irq.h"

// This variable is used to save the exception object between a ctrl-C and the
// PENDSV call that actually raises the exception.  It must be non-static
// otherwise gcc-5 optimises it away.  It can point to the heap but is not
// traced by GC.  This is okay because we only ever set it to
// mp_const_vcp_interrupt which is in the root-pointer set.
void *pendsv_object;

void pendsv_init(void) {
    // set PendSV interrupt at lowest priority
    HAL_NVIC_SetPriority(PendSV_IRQn, IRQ_PRI_PENDSV, IRQ_SUBPRI_PENDSV);
}

// Call this function to raise a pending exception during an interrupt.
// It will first try to raise the exception "softly" by setting the
// mp_pending_exception variable and hoping that the VM will notice it.
// If this function is called a second time (ie with the mp_pending_exception
// variable already set) then it will force the exception by using the hardware
// PENDSV feature.  This will wait until all interrupts are finished then raise
// the given exception object using nlr_jump in the context of the top-level
// thread.
void pendsv_nlr_jump(void *o) {
    if (MP_STATE_VM(mp_pending_exception) == MP_OBJ_NULL) {
        MP_STATE_VM(mp_pending_exception) = o;
    } else {
        MP_STATE_VM(mp_pending_exception) = MP_OBJ_NULL;
        pendsv_object = o;
        SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
    }
}

void pendsv_isr_handler(void) {
    // re-jig the stack so that when we return from this interrupt handler
    // it returns instead to nlr_jump with argument pendsv_object
    // note that stack has a different layout if DEBUG is enabled
    //
    // on entry to this (naked) function, stack has the following layout:
    //
    // stack layout with DEBUG disabled:
    //   sp[6]: pc
    //   sp[5]: ?
    //   sp[4]: ?
    //   sp[3]: ?
    //   sp[2]: ?
    //   sp[1]: ?
    //   sp[0]: r0
    //
    // stack layout with DEBUG enabled:
    //   sp[8]: pc
    //   sp[7]: lr
    //   sp[6]: ?
    //   sp[5]: ?
    //   sp[4]: ?
    //   sp[3]: ?
    //   sp[2]: r0
    //   sp[1]: 0xfffffff9
    //   sp[0]: ?

    __asm volatile (
        "ldr r0, pendsv_object_ptr\n"
        "ldr r0, [r0]\n"
#if defined(PENDSV_DEBUG)
        "str r0, [sp, #8]\n"
#else
        "str r0, [sp, #0]\n"
#endif
        "ldr r0, nlr_jump_ptr\n"
#if defined(PENDSV_DEBUG)
        "str r0, [sp, #32]\n"
#else
        "str r0, [sp, #24]\n"
#endif
        "bx lr\n"
        ".align 2\n"
        "pendsv_object_ptr: .word pendsv_object\n"
        "nlr_jump_ptr: .word nlr_jump\n"
    );

    /*
    uint32_t x[2] = {0x424242, 0xdeaddead};
    printf("PendSV: %p\n", x);
    for (uint32_t *p = (uint32_t*)(((uint32_t)x - 15) & 0xfffffff0), i = 64; i > 0; p += 4, i -= 4) {
        printf(" %p: %08x %08x %08x %08x\n", p, (uint)p[0], (uint)p[1], (uint)p[2], (uint)p[3]);
    }
    */
}
@


1.1
log
@Initial revision
@
text
@@


1.1.1.1
log
@Import micropython version 1.5.2 into othersrc.

Micropython is a python3 implementation that has been optimised for
micro-controllers and small embedded systems.  It also has a "unix"
port. It has an MIT license.

This is version 1.5.2 of micropython.

	MicroPython implements the entire Python 3.4 syntax (including
	exceptions, "with", "yield from", etc.).  The following core
	datatypes are provided:  str (including basic Unicode
	support), bytes, bytearray, tuple, list, dict, set, frozenset,
	array.array, collections.namedtuple, classes and instances. 
	Builtin modules include sys, time, and struct.  Note that only
	subset of Python 3.4 functionality implemented for the data
	types and modules.

This is the standard micropython source (version v1.5.2), which has been
adapted to use reachover infrastructure. At the present time, libffi
(from pkgsrc) is used. Alternative locations for libffi can be set
using the PKGSRC_PREFIX definition to make.

In the whole scheme of things, micropython is quite small:

	% size bin/micropython
	   text    data     bss     dec     hex filename
	 393495    1624    2208  397327   6100f bin/micropython
	%

and runs much as expected:

	% bin/micropython
	MicroPython v1.5.2 on 2016-01-13; linux version
	Use Ctrl-D to exit, Ctrl-E for paste mode
	>>> print("hello world")
	hello world
	>>> list(5 * x + y for x in range(10) for y in [4, 2, 1])
	[4, 2, 1, 9, 7, 6, 14, 12, 11, 19, 17, 16, 24, 22, 21, 29, 27, 26, 34, 32, 31, 39, 37, 36, 44, 42, 41, 49, 47, 46]
	>>>
	% python2.7
	Python 2.7.10 (default, Oct 17 2015, 17:55:29)
	[GCC 4.8.5] on netbsd7
	Type "help", "copyright", "credits" or "license" for more information.
	>>> print("hello world")
	hello world
	>>> list(5 * x + y for x in range(10) for y in [4, 2, 1])
	[4, 2, 1, 9, 7, 6, 14, 12, 11, 19, 17, 16, 24, 22, 21, 29, 27, 26, 34, 32, 31, 39, 37, 36, 44, 42, 41, 49, 47, 46]
	>>> ^D
	%

This (reachover) version runs all the tests which the gmake version does.

	% make t
	cd bin && make t
	cd /home/agc/local/micropython/bin/../dist/unix/../tests && env MICROPY_MICROPYTHON=/home/agc/local/micropython/bin/micropython ./run-tests
	pass  basics/0prelim.py
	pass  basics/andor.py
	pass  basics/array1.py
	pass  basics/array_add.py
	pass  basics/array_construct.py
	pass  basics/array_construct2.py
	...
	pass  unix/ffi_callback.py
	pass  unix/ffi_float.py
	pass  unix/ffi_float2.py
	474 tests performed (15812 individual testcases)
	474 tests passed
	5 tests skipped: cmd_showbc cmd_verbose machine1 machine_mem extra_coverage
	%

The sources are available from github:
	https://github.com/micropython/micropython

micropython release at:
	https://github.com/micropython/micropython/releases

Sources for 1.5.2 taken from:
	https://github.com/micropython/micropython/archive/v1.5.2.tar.gz

Alistair Crooks
agc@@netbsd.org
Wed Jan 13 17:15:30 PST 2016
@
text
@@