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Add 'bare-arm' port: the bare minimum to get it running on an ARM MCU.

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This commit is contained in:
Damien George 2014-04-12 13:07:45 +01:00
parent f7e4e1c2b4
commit c557215822
5 changed files with 313 additions and 0 deletions
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44
bare-arm/Makefile Normal file
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include ../py/mkenv.mk
# qstr definitions (must come before including py.mk)
QSTR_DEFS = qstrdefsport.h
# include py core make definitions
include ../py/py.mk
CROSS_COMPILE = arm-none-eabi-
CFLAGS_CORTEX_M4 = -mthumb -mtune=cortex-m4 -mabi=aapcs-linux -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -fsingle-precision-constant -Wdouble-promotion
CFLAGS = -I. -I$(PY_SRC) -Wall -Werror -ansi -std=gnu99 $(CFLAGS_CORTEX_M4) $(COPT)
#Debugging/Optimization
ifeq ($(DEBUG), 1)
CFLAGS += -O0 -ggdb
else
CFLAGS += -Os -DNDEBUG
endif
LDFLAGS = --nostdlib -T stm32f405.ld
LIBS =
SRC_C = \
main.c \
# printf.c \
string0.c \
malloc0.c \
gccollect.c \
SRC_S = \
# startup_stm32f40xx.s \
gchelper.s \
OBJ = $(PY_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o) $(SRC_S:.s=.o))
all: $(BUILD)/flash.elf
$(BUILD)/flash.elf: $(OBJ)
$(ECHO) "LINK $@"
$(Q)$(LD) $(LDFLAGS) -o $@ $(OBJ) $(LIBS)
$(Q)$(SIZE) $@
include ../py/mkrules.mk

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bare-arm/main.c Normal file
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#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "lexer.h"
#include "parse.h"
#include "obj.h"
#include "parsehelper.h"
#include "compile.h"
#include "runtime0.h"
#include "runtime.h"
#include "repl.h"
void do_str(const char *src) {
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, src, strlen(src), 0);
if (lex == NULL) {
return;
}
mp_parse_error_kind_t parse_error_kind;
mp_parse_node_t pn = mp_parse(lex, MP_PARSE_SINGLE_INPUT, &parse_error_kind);
if (pn == MP_PARSE_NODE_NULL) {
// parse error
mp_parse_show_exception(lex, parse_error_kind);
mp_lexer_free(lex);
return;
}
// parse okay
qstr source_name = mp_lexer_source_name(lex);
mp_lexer_free(lex);
mp_obj_t module_fun = mp_compile(pn, source_name, MP_EMIT_OPT_NONE, true);
mp_parse_node_free(pn);
if (module_fun == mp_const_none) {
// compile error
return;
}
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mp_call_function_0(module_fun);
nlr_pop();
} else {
// uncaught exception
mp_obj_print_exception((mp_obj_t)nlr.ret_val);
}
}
int main(int argc, char **argv) {
qstr_init();
mp_init();
do_str("print('hello world!', list(x+1 for x in range(10)), end='eol\n')");
mp_deinit();
return 0;
}
void gc_collect(void) {
}
mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
return NULL;
}
mp_import_stat_t mp_import_stat(const char *path) {
return MP_IMPORT_STAT_NO_EXIST;
}
mp_obj_t mp_builtin_open(uint n_args, const mp_obj_t *args) {
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_open_obj, 1, 2, mp_builtin_open);
void nlr_jump_fail(void *val) {
}
/*
int _lseek() {return 0;}
int _read() {return 0;}
int _write() {return 0;}
int _close() {return 0;}
void _exit(int x) {for(;;){}}
int _sbrk() {return 0;}
int _kill() {return 0;}
int _getpid() {return 0;}
int _fstat() {return 0;}
int _isatty() {return 0;}
*/
void *malloc(size_t n) {return NULL;}
void *calloc(size_t nmemb, size_t size) {return NULL;}
void *realloc(void *ptr, size_t size) {return NULL;}
void free(void *p) {}
int printf(const char *m, ...) {return 0;}
void *memcpy(void *dest, const void *src, size_t n) {return NULL;}
int memcmp(const void *s1, const void *s2, size_t n) {return 0;}
void *memmove(void *dest, const void *src, size_t n) {return NULL;}
void *memset(void *s, int c, size_t n) {return NULL;}
int strcmp(const char *s1, const char* s2) {return 0;}
int strncmp(const char *s1, const char* s2, size_t n) {return 0;}
size_t strlen(const char *s) {return 0;}
char *strcat(char *dest, const char *src) {return NULL;}
char *strchr(const char *dest, int c) {return NULL;}
#include <stdarg.h>
int vprintf(const char *format, va_list ap) {return 0;}
int vsnprintf(char *str, size_t size, const char *format, va_list ap) {return 0;}
#undef putchar
int putchar(int c) {return 0;}
int puts(const char *s) {return 0;}
void _start(void) {main(0, NULL);}

34
bare-arm/mpconfigport.h Normal file
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#include <stdint.h>
// options to control how Micro Python is built
#define MICROPY_EMIT_X64 (0)
#define MICROPY_EMIT_THUMB (0)
#define MICROPY_EMIT_INLINE_THUMB (0)
#define MICROPY_MEM_STATS (0)
#define MICROPY_DEBUG_PRINTERS (0)
#define MICROPY_ENABLE_GC (0)
#define MICROPY_ENABLE_REPL_HELPERS (0)
#define MICROPY_ENABLE_LEXER_UNIX (0)
#define MICROPY_ENABLE_SOURCE_LINE (0)
#define MICROPY_LONGINT_IMPL (MICROPY_LONGINT_IMPL_NONE)
#define MICROPY_FLOAT_IMPL (MICROPY_FLOAT_IMPL_NONE)
#define MICROPY_PATH_MAX (512)
// type definitions for the specific machine
#define BYTES_PER_WORD (4)
#define UINT_FMT "%lu"
#define INT_FMT "%ld"
typedef int32_t machine_int_t; // must be pointer size
typedef uint32_t machine_uint_t; // must be pointer size
typedef void *machine_ptr_t; // must be of pointer size
typedef const void *machine_const_ptr_t; // must be of pointer size
// extra built in names to add to the global namespace
extern const struct _mp_obj_fun_native_t mp_builtin_open_obj;
#define MICROPY_EXTRA_BUILTINS \
{ MP_OBJ_NEW_QSTR(MP_QSTR_open), (mp_obj_t)&mp_builtin_open_obj },

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bare-arm/qstrdefsport.h Normal file
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// qstrs specific to this port

117
bare-arm/stm32f405.ld Normal file
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/*
GNU linker script for STM32F405
*/
/* Specify the memory areas */
MEMORY
{
FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 0x100000 /* entire flash, 1 MiB */
FLASH_ISR (rx) : ORIGIN = 0x08000000, LENGTH = 0x004000 /* sector 0, 16 KiB */
FLASH_TEXT (rx) : ORIGIN = 0x08020000, LENGTH = 0x080000 /* sectors 5,6,7,8, 4*128KiB = 512 KiB (could increase it more) */
CCMRAM (xrw) : ORIGIN = 0x10000000, LENGTH = 0x010000 /* 64 KiB */
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 0x020000 /* 128 KiB */
}
/* top end of the stack */
_estack = ORIGIN(RAM) + LENGTH(RAM);
/* RAM extents for the garbage collector */
_ram_end = ORIGIN(RAM) + LENGTH(RAM);
_heap_end = 0x2001c000; /* tunable */
/* define output sections */
SECTIONS
{
/* The startup code goes first into FLASH */
.isr_vector :
{
. = ALIGN(4);
KEEP(*(.isr_vector)) /* Startup code */
. = ALIGN(4);
} >FLASH_ISR
/* The program code and other data goes into FLASH */
.text :
{
. = ALIGN(4);
*(.text) /* .text sections (code) */
*(.text*) /* .text* sections (code) */
*(.rodata) /* .rodata sections (constants, strings, etc.) */
*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
/* *(.glue_7) */ /* glue arm to thumb code */
/* *(.glue_7t) */ /* glue thumb to arm code */
. = ALIGN(4);
_etext = .; /* define a global symbol at end of code */
_sidata = _etext; /* This is used by the startup in order to initialize the .data secion */
} >FLASH_TEXT
/*
.ARM.extab :
{
*(.ARM.extab* .gnu.linkonce.armextab.*)
} >FLASH
.ARM :
{
__exidx_start = .;
*(.ARM.exidx*)
__exidx_end = .;
} >FLASH
*/
/* This is the initialized data section
The program executes knowing that the data is in the RAM
but the loader puts the initial values in the FLASH (inidata).
It is one task of the startup to copy the initial values from FLASH to RAM. */
.data : AT ( _sidata )
{
. = ALIGN(4);
_sdata = .; /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */
_ram_start = .; /* create a global symbol at ram start for garbage collector */
*(.data) /* .data sections */
*(.data*) /* .data* sections */
. = ALIGN(4);
_edata = .; /* define a global symbol at data end; used by startup code in order to initialise the .data section in RAM */
} >RAM
/* Uninitialized data section */
.bss :
{
. = ALIGN(4);
_sbss = .; /* define a global symbol at bss start; used by startup code */
*(.bss)
*(.bss*)
*(COMMON)
. = ALIGN(4);
_ebss = .; /* define a global symbol at bss end; used by startup code */
} >RAM
/* this is to define the start of the heap, and make sure we have a minimum size */
.heap :
{
. = ALIGN(4);
_heap_start = .; /* define a global symbol at heap start */
} >RAM
/* this just checks there is enough RAM for the stack */
.stack :
{
. = ALIGN(4);
} >RAM
/* Remove information from the standard libraries */
/*
/DISCARD/ :
{
libc.a ( * )
libm.a ( * )
libgcc.a ( * )
}
*/
.ARM.attributes 0 : { *(.ARM.attributes) }
}