Commit a215b09c authored by mux's avatar mux
Browse files

Move gc_collect to py/gc.c

* Move gc_collect from main to py/gc.c
* Define GC's memory boundaries in linker script
* Issue #220
parent 40048ada
......@@ -187,6 +187,22 @@ void gc_collect_end(void) {
gc_sweep();
}
extern void gc_helper_get_regs_and_clean_stack(machine_uint_t *regs, machine_uint_t heap_end);
void gc_collect(void) {
extern char _ram_start; /* defined by linker script */
extern char _ram_end; /* defined by linker script */
extern char _heap_start; /* defined by linker script */
extern char _heap_end; /* defined by linker script */
gc_collect_start();
gc_collect_root((void**)&_ram_start, (&_heap_start - &_ram_start) / 4);
machine_uint_t regs[10];
gc_helper_get_regs_and_clean_stack(regs, (uint32_t) &_heap_end);
gc_collect_root((void**)&_heap_end, (&_ram_end - &_heap_end) / 4); // will trace regs since they now live in this function on the stack
gc_collect_end();
}
void gc_info(gc_info_t *info) {
info->total = (gc_pool_end - gc_pool_start) * sizeof(machine_uint_t);
info->used = 0;
......
......@@ -48,6 +48,7 @@
int errno;
extern uint32_t _heap_start;
extern uint32_t _heap_end;
static FATFS fatfs0;
......@@ -455,21 +456,12 @@ bool do_file(const char *filename) {
}
}
#define RAM_START (0x20000000) // fixed for chip
#define HEAP_END (0x2001c000) // tunable
#define RAM_END (0x20020000) // fixed for chip
void gc_helper_get_regs_and_clean_stack(machine_uint_t *regs, machine_uint_t heap_end);
mp_obj_t pyb_gc(void) {
uint32_t start,ticks;
void gc_collect(void) {
uint32_t start = sys_tick_counter;
gc_collect_start();
gc_collect_root((void**)RAM_START, (((uint32_t)&_heap_start) - RAM_START) / 4);
machine_uint_t regs[10];
gc_helper_get_regs_and_clean_stack(regs, HEAP_END);
gc_collect_root((void**)HEAP_END, (RAM_END - HEAP_END) / 4); // will trace regs since they now live in this function on the stack
gc_collect_end();
uint32_t ticks = sys_tick_counter - start; // TODO implement a function that does this properly
start = sys_tick_counter;
gc_collect();
ticks = sys_tick_counter - start; // TODO implement a function that does this properly
if (0) {
// print GC info
......@@ -480,10 +472,7 @@ void gc_collect(void) {
printf(" %lu : %lu\n", info.used, info.free);
printf(" 1=%lu 2=%lu m=%lu\n", info.num_1block, info.num_2block, info.max_block);
}
}
mp_obj_t pyb_gc(void) {
gc_collect();
return mp_const_none;
}
......@@ -609,7 +598,7 @@ int main(void) {
soft_reset:
// GC init
gc_init(&_heap_start, (void*)HEAP_END);
gc_init(&_heap_start, &_heap_end);
// Micro Python init
qstr_init();
......
......@@ -19,6 +19,10 @@ _minimum_heap_size = 16K;
/* top end of the stack */
_estack = ORIGIN(RAM) + LENGTH(RAM);
_ram_start = 0x20000000;
_ram_end = 0x20020000;
_heap_end = 0x2001c000;
/* define output sections */
SECTIONS
{
......
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