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bldc/lispBM/lispif.c

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/*
Copyright 2022 Benjamin Vedder benjamin@vedder.se
Copyright 2022 Joel Svensson svenssonjoel@yahoo.se
This file is part of the VESC firmware.
The VESC firmware is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
The VESC firmware is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma GCC push_options
#pragma GCC optimize ("Os")
#include "lispif.h"
#include "commands.h"
#include "terminal.h"
#include "flash_helper.h"
#include "buffer.h"
#include "timeout.h"
#include "lispbm.h"
#include "mempools.h"
#include "stm32f4xx_conf.h"
#include "lbm_prof.h"
#include "utils.h"
#define LBM_MEMORY_SIZE_18K LBM_MEMORY_SIZE_64BYTES_TIMES_X(256 + 32)
#define LBM_MEMORY_BITMAP_SIZE_18K LBM_MEMORY_BITMAP_SIZE(256 + 32)
#define HEAP_SIZE (2048 + 256 + 160)
#define LISP_MEM_SIZE LBM_MEMORY_SIZE_18K
#define LISP_MEM_BITMAP_SIZE LBM_MEMORY_BITMAP_SIZE_18K
#define GC_STACK_SIZE 160
#define PRINT_STACK_SIZE 128
#define EXTENSION_STORAGE_SIZE 295
#define EXT_LOAD_CALLBACK_LEN 20
#define PROF_DATA_NUM 30
__attribute__((section(".ram4"))) static lbm_cons_t heap[HEAP_SIZE] __attribute__ ((aligned (8)));
static uint32_t memory_array[LISP_MEM_SIZE];
__attribute__((section(".ram4"))) static uint32_t bitmap_array[LISP_MEM_BITMAP_SIZE];
__attribute__((section(".ram4"))) static lbm_extension_t extension_storage[EXTENSION_STORAGE_SIZE];
__attribute__((section(".ram4"))) static lbm_prof_t prof_data[PROF_DATA_NUM];
static volatile bool prof_running = false;
static lbm_string_channel_state_t string_tok_state;
static lbm_char_channel_t string_tok;
static lbm_buffered_channel_state_t buffered_tok_state;
static lbm_char_channel_t buffered_string_tok;
static lbm_const_heap_t const_heap;
static lbm_uint *const_heap_ptr = 0;
static thread_t *eval_tp = 0;
static THD_FUNCTION(eval_thread, arg);
static THD_WORKING_AREA(eval_thread_wa, 2048);
static volatile bool lisp_thd_running = false;
static mutex_t lbm_mutex;
static lbm_cid repl_cid = -1;
static lbm_cid repl_cid_for_buffer = -1;
static char *repl_buffer = 0;
static volatile systime_t repl_time = 0;
static int restart_cnt = 0;
// Private functions
static uint32_t timestamp_callback(void);
static void sleep_callback(uint32_t us);
static bool const_heap_write(lbm_uint ix, lbm_uint w);
// Extension load callbacks
void(*ext_load_callbacks[EXT_LOAD_CALLBACK_LEN])(void) = {0};
void lispif_init(void) {
// Do not attempt to start lisp after a watchdog reset, in case lisp
// was the cause of it.
// TODO: Anything else to check?
if (!timeout_had_IWDG_reset() && terminal_get_first_fault() != FAULT_CODE_BOOTING_FROM_WATCHDOG_RESET) {
lispif_restart(false, true, true);
}
lbm_set_eval_step_quota(50);
chMtxObjectInit(&lbm_mutex);
}
int lispif_get_restart_cnt(void) {
return restart_cnt;
}
void lispif_lock_lbm(void) {
chMtxLock(&lbm_mutex);
}
void lispif_unlock_lbm(void) {
chMtxUnlock(&lbm_mutex);
}
static void print_ctx_info(eval_context_t *ctx, void *arg1, void *arg2) {
(void) arg1;
(void) arg2;
char output[128];
int print_ret = lbm_print_value(output, sizeof(output), ctx->r);
commands_printf_lisp("--------------------------------");
commands_printf_lisp("ContextID: %u", ctx->id);
commands_printf_lisp("Stack SP: %u", ctx->K.sp);
commands_printf_lisp("Stack SP max: %u", ctx->K.max_sp);
commands_printf_lisp("Result%s: %s", print_ret ? "" : " (trunc)", output);
}
static void sym_it(const char *str) {
bool sym_name_flash = lbm_symbol_in_flash((char *)str);
bool sym_entry_flash = lbm_symbol_list_entry_in_flash((char *)str);
commands_printf_lisp("[Name: %s, Entry: %s]: %s\n",
sym_name_flash ? "FLASH" : "L_MEM",
sym_entry_flash ? "FLASH" : "L_MEM",
str);
}
static void prof_thd_wrapper(void *v) {
(void)v;
while (prof_running) {
lbm_prof_sample();
chThdSleepMicroseconds(200);
}
}
void lispif_process_cmd(unsigned char *data, unsigned int len,
void(*reply_func)(unsigned char *data, unsigned int len)) {
COMM_PACKET_ID packet_id;
packet_id = data[0];
data++;
len--;
switch (packet_id) {
case COMM_LISP_SET_RUNNING: {
bool ok = false;
bool running = data[0];
lispif_disable_all_events();
if (!running) {
int timeout_cnt = 2000;
lbm_pause_eval();
while (lbm_get_eval_state() != EVAL_CPS_STATE_PAUSED && timeout_cnt > 0) {
chThdSleepMilliseconds(1);
timeout_cnt--;
}
ok = timeout_cnt > 0;
} else {
ok = lispif_restart(true, true, true);
}
int32_t ind = 0;
uint8_t send_buffer[50];
send_buffer[ind++] = packet_id;
send_buffer[ind++] = ok;
reply_func(send_buffer, ind);
} break;
case COMM_LISP_GET_STATS: {
float cpu_use = 0.0;
float heap_use = 0.0;
float mem_use = 0.0;
static systime_t time_last = 0;
if (eval_tp) {
cpu_use = 100.0 * (float)eval_tp->p_time / (float)(chVTGetSystemTimeX() - time_last);
time_last = chVTGetSystemTimeX();
eval_tp->p_time = 0;
} else {
break;
}
bool print_all = true;
if (len > 0) {
print_all = data[0];
}
lbm_gc_lock();
if (lbm_heap_state.gc_num > 0) {
heap_use = 100.0 * (float)(HEAP_SIZE - lbm_heap_state.gc_last_free) / (float)HEAP_SIZE;
}
mem_use = 100.0 * (float)(lbm_memory_num_words() - lbm_memory_num_free()) / (float)lbm_memory_num_words();
uint8_t *send_buffer_global = mempools_get_packet_buffer();
int32_t ind = 0;
send_buffer_global[ind++] = packet_id;
buffer_append_float16(send_buffer_global, cpu_use, 1e2, &ind);
buffer_append_float16(send_buffer_global, heap_use, 1e2, &ind);
buffer_append_float16(send_buffer_global, mem_use, 1e2, &ind);
// Stack. Currently unused
buffer_append_float16(send_buffer_global, 0, 1e2, &ind);
// Result. Currently unused
send_buffer_global[ind++] = '\0';
lbm_value *glob_env = lbm_get_global_env();
for (int i = 0; i < GLOBAL_ENV_ROOTS; i ++) {
if (ind > 300) {
break;
}
lbm_value curr = glob_env[i];
while (lbm_type_of(curr) == LBM_TYPE_CONS) {
lbm_value key_val = lbm_car(curr);
if (lbm_type_of(lbm_car(key_val)) == LBM_TYPE_SYMBOL && lbm_is_number(lbm_cdr(key_val))) {
const char *name = lbm_get_name_by_symbol(lbm_dec_sym(lbm_car(key_val)));
if (print_all ||
((name[0] == 'v' || name[0] == 'V') &&
(name[1] == 't' || name[1] == 'T'))) {
strcpy((char*)(send_buffer_global + ind), name);
ind += strlen(name) + 1;
buffer_append_float32_auto(send_buffer_global, lbm_dec_as_float(lbm_cdr(key_val)), &ind);
}
}
if (ind > 300) {
break;
}
curr = lbm_cdr(curr);
}
}
lbm_gc_unlock();
reply_func(send_buffer_global, ind);
mempools_free_packet_buffer(send_buffer_global);
} break;
case COMM_LISP_REPL_CMD: {
if (UTILS_AGE_S(repl_time) <= 0.5) {
return;
}
if (!lisp_thd_running) {
lispif_restart(true, false, true);
}
if (lisp_thd_running) {
lispif_lock_lbm();
char *str = (char*)data;
if (len <= 1) {
commands_printf_lisp(">");
} else if (strncmp(str, ":help", 5) == 0) {
commands_printf_lisp("== Special Commands ==");
commands_printf_lisp(
":help\n"
" Print this help text");
commands_printf_lisp(
":info\n"
" Print info about memory usage, allocated arrays and garbage collection");
commands_printf_lisp(
":prof start\n"
" Start profiler");
commands_printf_lisp(
":prof stop\n"
" Stop profiler");
commands_printf_lisp(
":prof report\n"
" Print profiler report");
commands_printf_lisp(
":env\n"
" Print current environment and variables");
commands_printf_lisp(
":ctxs\n"
" Print context (threads) info");
commands_printf_lisp(
":symbols\n"
" Print symbol names");
commands_printf_lisp(
":reset\n"
" Reset LBM");
commands_printf_lisp(
":pause\n"
" Pause LBM");
commands_printf_lisp(
":continue\n"
" Continue running LBM");
commands_printf_lisp(
":undef <symbol_name>\n"
" Undefine symbol");
commands_printf_lisp(
":verb\n"
" Toggle verbose error messages");
commands_printf_lisp(" ");
commands_printf_lisp("Anything else will be evaluated as an expression in LBM.");
commands_printf_lisp(" ");
} else if (strncmp(str, ":info", 5) == 0) {
commands_printf_lisp("--(LISP HEAP)--\n");
commands_printf_lisp("Heap size: %u Bytes\n", HEAP_SIZE * 8);
commands_printf_lisp("Used cons cells: %d\n", HEAP_SIZE - lbm_heap_num_free());
commands_printf_lisp("Free cons cells: %d\n", lbm_heap_num_free());
commands_printf_lisp("GC counter: %d\n", lbm_heap_state.gc_num);
commands_printf_lisp("Recovered: %d\n", lbm_heap_state.gc_recovered);
commands_printf_lisp("Recovered arrays: %u\n", lbm_heap_state.gc_recovered_arrays);
commands_printf_lisp("Marked: %d\n", lbm_heap_state.gc_marked);
commands_printf_lisp("GC SP max: %u (size %u)\n", lbm_heap_state.gc_stack.max_sp, lbm_heap_state.gc_stack.size);
commands_printf_lisp("--(Symbol and Array memory)--\n");
commands_printf_lisp("Memory size: %u bytes\n", lbm_memory_num_words() * 4);
commands_printf_lisp("Memory free: %u bytes\n", lbm_memory_num_free() * 4);
commands_printf_lisp("Longest block free: %u bytes\n", lbm_memory_longest_free() * 4);
commands_printf_lisp("Allocated arrays: %u\n", lbm_heap_state.num_alloc_arrays);
commands_printf_lisp("Symbol table size: %u Bytes\n", lbm_get_symbol_table_size());
commands_printf_lisp("Symbol table size flash: %u Bytes\n", lbm_get_symbol_table_size_flash());
commands_printf_lisp("Symbol name size: %u Bytes\n", lbm_get_symbol_table_size_names());
commands_printf_lisp("Symbol name size flash: %u Bytes\n", lbm_get_symbol_table_size_names_flash());
commands_printf_lisp("Extensions: %u, max %u\n", lbm_get_num_extensions(), lbm_get_max_extensions());
commands_printf_lisp("--(Flash)--\n");
commands_printf_lisp("Size: %u Bytes\n", const_heap.size);
commands_printf_lisp("Used cells: %d\n", const_heap.next);
commands_printf_lisp("Free cells: %d\n", const_heap.size / 4 - const_heap.next);
} else if (strncmp(str, ":prof start", 11) == 0) {
if (prof_running) {
lbm_prof_init(prof_data, PROF_DATA_NUM);
commands_printf_lisp("Profiler restarted\n");
} else {
lbm_prof_init(prof_data, PROF_DATA_NUM);
prof_running = true;
if (lispif_spawn(prof_thd_wrapper, 1024, "LBM Profiler", NULL)) {
commands_printf_lisp("Profiler started\n");
} else {
commands_printf_lisp("Could not start profiler, most likely out of memory\n");
}
}
} else if (strncmp(str, ":prof stop", 10) == 0) {
commands_printf_lisp("Profiler stopped. Issue command ':prof report' for statistics\n");
prof_running = false;
} else if (strncmp(str, ":prof report", 12) == 0) {
lbm_uint num_sleep = lbm_prof_get_num_sleep_samples();
lbm_uint num_system = lbm_prof_get_num_system_samples();
lbm_uint tot_samples = lbm_prof_get_num_samples();
lbm_uint tot_gc = 0;
commands_printf_lisp("CID\tName\tSamples\t%%Load\t%%GC");
for (int i = 0; i < PROF_DATA_NUM; i ++) {
if (prof_data[i].cid == -1) break;
tot_gc += prof_data[i].gc_count;
commands_printf_lisp("%d\t%s\t%u\t%.3f\t%.3f",
prof_data[i].cid,
prof_data[i].name,
prof_data[i].count,
(double)(100.0 * ((float)prof_data[i].count) / (float) tot_samples),
(double)(100.0 * ((float)prof_data[i].gc_count) / (float)prof_data[i].count));
}
commands_printf_lisp(" ");
commands_printf_lisp("GC:\t%u\t%f%%\n", tot_gc, (double)(100.0 * ((float)tot_gc / (float)tot_samples)));
commands_printf_lisp("System:\t%u\t%f%%\n", num_system, (double)(100.0 * ((float)num_system / (float)tot_samples)));
commands_printf_lisp("Sleep:\t%u\t%f%%\n", num_sleep, (double)(100.0 * ((float)num_sleep / (float)tot_samples)));
commands_printf_lisp("Total:\t%u samples\n", tot_samples);
} else if (strncmp(str, ":env", 4) == 0) {
lbm_value *glob_env = lbm_get_global_env();
char output[128];
for (int i = 0; i < GLOBAL_ENV_ROOTS; i ++) {
lbm_value curr = glob_env[i];
while (lbm_type_of(curr) == LBM_TYPE_CONS) {
lbm_print_value(output, sizeof(output), lbm_car(curr));
curr = lbm_cdr(curr);
commands_printf_lisp(" %s", output);
}
}
} else if (strncmp(str, ":ctxs", 5) == 0) {
commands_printf_lisp("****** Running contexts ******");
lbm_running_iterator(print_ctx_info, NULL, NULL);
commands_printf_lisp("****** Blocked contexts ******");
lbm_blocked_iterator(print_ctx_info, NULL, NULL);
} else if (strncmp(str, ":symbols", 8) == 0) {
lbm_symrepr_name_iterator(sym_it);
commands_printf_lisp(" ");
} else if (strncmp(str, ":reset", 6) == 0) {
commands_printf_lisp(lispif_restart(false, flash_helper_code_size(CODE_IND_LISP) > 0, true) ?
"Reset OK\n\n" : "Reset Failed\n\n");
} else if (strncmp(str, ":pause", 6) == 0) {
lbm_pause_eval_with_gc(30);
while (lbm_get_eval_state() != EVAL_CPS_STATE_PAUSED) {
lbm_pause_eval();
sleep_callback(1);
}
commands_printf_lisp("Evaluator paused\n");
} else if (strncmp(str, ":continue", 9) == 0) {
lbm_continue_eval();
} else if (strncmp(str, ":undef", 6) == 0) {
lbm_pause_eval();
while(lbm_get_eval_state() != EVAL_CPS_STATE_PAUSED) {
lbm_pause_eval();
sleep_callback(1);
}
char *sym = str + 7;
commands_printf_lisp("undefining: %s", sym);
commands_printf_lisp("%s", lbm_undefine(sym) ? "Cleared bindings" : "No definition found");
lbm_continue_eval();
} else if (strncmp(str, ":verb", 5) == 0) {
static bool verbose_now = false;
verbose_now = !verbose_now;
lbm_set_verbose(verbose_now);
commands_printf_lisp("Verbose errors %s", verbose_now ? "Enabled" : "Disabled");
} else {
if (repl_buffer) {
lispif_unlock_lbm();
break;
}
bool ok = true;
int timeout_cnt = 1000;
lbm_pause_eval_with_gc(30);
while (lbm_get_eval_state() != EVAL_CPS_STATE_PAUSED && timeout_cnt > 0) {
chThdSleep(5);
timeout_cnt--;
}
ok = timeout_cnt > 0;
if (ok) {
repl_buffer = lbm_malloc_reserve(len);
if (repl_buffer) {
memcpy(repl_buffer, data, len);
lbm_create_string_char_channel(&string_tok_state, &string_tok, repl_buffer);
repl_cid = lbm_load_and_eval_expression(&string_tok);
repl_cid_for_buffer = repl_cid;
lbm_continue_eval();
if (reply_func != NULL) {
repl_time = chVTGetSystemTimeX();
} else {
repl_cid = -1;
}
} else {
commands_printf_lisp("Not enough memory");
}
} else {
commands_printf_lisp("Could not pause");
}
}
lispif_unlock_lbm();
} else {
commands_printf_lisp("LispBM is not running");
}
} break;
case COMM_LISP_STREAM_CODE: {
int32_t ind = 0;
int32_t offset = buffer_get_int32(data, &ind);
int32_t tot_len = buffer_get_int32(data, &ind);
int8_t restart = data[ind++];
static bool buffered_channel_created = false;
static int32_t offset_last = -1;
static int16_t result_last = -1;
if (offset == 0) {
if (!lisp_thd_running) {
lispif_restart(true, restart == 2 ? true : false, true);
buffered_channel_created = false;
} else if (restart == 1) {
lispif_restart(true, false, true);
buffered_channel_created = false;
} else if (restart == 2) {
lispif_restart(true, true, true);
buffered_channel_created = false;
}
}
int32_t send_ind = 0;
uint8_t send_buffer[50];
send_buffer[send_ind++] = packet_id;
buffer_append_int32(send_buffer, offset, &send_ind);
if (offset_last == offset) {
buffer_append_int16(send_buffer, result_last, &send_ind);
reply_func(send_buffer, ind);
break;
}
offset_last = offset;
if (!lisp_thd_running) {
result_last = -1;
offset_last = -1;
buffer_append_int16(send_buffer, result_last, &send_ind);
reply_func(send_buffer, ind);
break;
}
if (offset == 0) {
if (buffered_channel_created) {
int timeout = 1500;
while (!buffered_tok_state.reader_closed) {
lbm_channel_writer_close(&buffered_string_tok);
chThdSleepMilliseconds(1);
timeout--;
if (timeout == 0) {
break;
}
}
if (timeout == 0) {
result_last = -2;
offset_last = -1;
buffer_append_int16(send_buffer, result_last, &send_ind);
commands_printf_lisp("Reader not closing");
reply_func(send_buffer, ind);
break;
}
}
int timeout_cnt = 1000;
lispif_lock_lbm();
lbm_pause_eval_with_gc(30);
while (lbm_get_eval_state() != EVAL_CPS_STATE_PAUSED && timeout_cnt > 0) {
chThdSleep(5);
timeout_cnt--;
}
if (timeout_cnt == 0) {
lispif_unlock_lbm();
result_last = -3;
offset_last = -1;
buffer_append_int16(send_buffer, result_last, &send_ind);
commands_printf_lisp("Could not pause");
reply_func(send_buffer, ind);
break;
}
lbm_create_buffered_char_channel(&buffered_tok_state, &buffered_string_tok);
if (lbm_load_and_eval_program(&buffered_string_tok, "main-s") <= 0) {
lispif_unlock_lbm();
result_last = -4;
offset_last = -1;
buffer_append_int16(send_buffer, result_last, &send_ind);
commands_printf_lisp("Could not start eval");
reply_func(send_buffer, ind);
break;
}
lbm_continue_eval();
buffered_channel_created = true;
lispif_unlock_lbm();
}
int32_t written = 0;
int timeout = 1500;
while (ind < (int32_t)len) {
int ch_res = lbm_channel_write(&buffered_string_tok, (char)data[ind]);
if (ch_res == CHANNEL_SUCCESS) {
ind++;
written++;
timeout = 0;
} else if (ch_res == CHANNEL_READER_CLOSED) {
break;
} else {
chThdSleepMilliseconds(1);
timeout--;
if (timeout == 0) {
break;
}
}
}
if (ind == (int32_t)len) {
if ((offset + written) == tot_len) {
lbm_channel_writer_close(&buffered_string_tok);
offset_last = -1;
commands_printf_lisp("Stream done, starting...");
}
result_last = 0;
buffer_append_int16(send_buffer, result_last, &send_ind);
} else {
if (timeout == 0) {
result_last = -5;
offset_last = -1;
buffer_append_int16(send_buffer, result_last, &send_ind);
commands_printf_lisp("Stream timed out");
} else {
result_last = -6;
offset_last = -1;
buffer_append_int16(send_buffer, result_last, &send_ind);
commands_printf_lisp("Stream closed");
}
}
reply_func(send_buffer, send_ind);
} break;
case COMM_LISP_RMSG: {
lispif_process_rmsg(data[0], data + 1, len - 1);
} break;
default:
break;
}
}
static void done_callback(eval_context_t *ctx) {
lbm_cid cid = ctx->id;
lbm_value t = ctx->r;
if (cid == repl_cid) {
if (UTILS_AGE_S(repl_time) < 0.5) {
char output[128];
lbm_print_value(output, sizeof(output), t);
commands_printf_lisp("> %s", output);
} else {
repl_cid = -1;
}
}
if (cid == repl_cid_for_buffer && repl_buffer) {
lbm_free(repl_buffer);
repl_buffer = 0;
}
}
bool lispif_restart(bool print, bool load_code, bool load_imports) {
bool res = false;
restart_cnt++;
prof_running = false;
char *code_data = (char*)flash_helper_code_data(CODE_IND_LISP);
int32_t code_len = flash_helper_code_size(CODE_IND_LISP);
if (!load_code || (code_data != 0 && code_len > 0)) {
lispif_disable_all_events();
if (!lisp_thd_running) {
lbm_init(heap, HEAP_SIZE,
memory_array, LISP_MEM_SIZE,
bitmap_array, LISP_MEM_BITMAP_SIZE,
GC_STACK_SIZE,
PRINT_STACK_SIZE,
extension_storage, EXTENSION_STORAGE_SIZE);
lbm_eval_init_events(20);
lbm_set_timestamp_us_callback(timestamp_callback);
lbm_set_usleep_callback(sleep_callback);
lbm_set_printf_callback(commands_printf_lisp);
lbm_set_ctx_done_callback(done_callback);
chThdCreateStatic(eval_thread_wa, sizeof(eval_thread_wa), NORMALPRIO - 1, eval_thread, NULL);
lisp_thd_running = true;
} else {
lbm_pause_eval();
while (lbm_get_eval_state() != EVAL_CPS_STATE_PAUSED) {
lbm_pause_eval();
chThdSleepMilliseconds(1);
}
lbm_init(heap, HEAP_SIZE,
memory_array, LISP_MEM_SIZE,
bitmap_array, LISP_MEM_BITMAP_SIZE,
GC_STACK_SIZE,
PRINT_STACK_SIZE,
extension_storage, EXTENSION_STORAGE_SIZE);
lbm_eval_init_events(20);
}
lbm_pause_eval();
while (lbm_get_eval_state() != EVAL_CPS_STATE_PAUSED) {
lbm_pause_eval();
chThdSleepMilliseconds(1);
}
// Load extensions
lispif_load_vesc_extensions();
for (int i = 0;i < EXT_LOAD_CALLBACK_LEN;i++) {
if (ext_load_callbacks[i] == 0) {
break;
}
ext_load_callbacks[i]();
}
lbm_set_dynamic_load_callback(lispif_vesc_dynamic_loader);
int code_chars = 0;
if (code_data) {
code_chars = strnlen(code_data, code_len);
}
if (code_data == 0) {
code_data = (char*)flash_helper_code_data_raw(CODE_IND_LISP);
}
const_heap_ptr = (lbm_uint*)(code_data + code_len + 16);
const_heap_ptr = (lbm_uint*)((uint32_t)const_heap_ptr & 0xFFFFFFF4);
uint32_t const_heap_len = ((uint32_t)code_data + 1024 * 128) - (uint32_t)const_heap_ptr;
lbm_const_heap_init(const_heap_write, &const_heap, const_heap_ptr, const_heap_len);
// Load imports
if (load_imports) {
if (code_len > code_chars + 3) {
int32_t ind = code_chars + 1;
uint16_t num_imports = buffer_get_uint16((uint8_t*)code_data, &ind);
if (num_imports > 0 && num_imports < 500) {
for (int i = 0;i < num_imports;i++) {
char *name = code_data + ind;
ind += strlen(name) + 1;
int32_t offset = buffer_get_int32((uint8_t*)code_data, &ind);
int32_t len = buffer_get_int32((uint8_t*)code_data, &ind);
lbm_value val;
if (lbm_share_array(&val, code_data + offset, len)) {
lbm_define(name, val);
}
}
}
}
}
if (load_code) {
if (print) {
commands_printf_lisp("Parsing %d characters", code_chars);
}
lbm_create_string_char_channel(&string_tok_state, &string_tok, code_data);
lbm_load_and_eval_program_incremental(&string_tok, "main-u");
}
lbm_continue_eval();
res = true;
}
if (repl_buffer) {
lbm_free(repl_buffer);
repl_buffer = 0;
}
return res;
}
void lispif_add_ext_load_callback(void (*p_func)(void)) {
for (int i = 0;i < EXT_LOAD_CALLBACK_LEN;i++) {
if (ext_load_callbacks[i] == 0 || ext_load_callbacks[i] == p_func) {
ext_load_callbacks[i] = p_func;
break;
}
}
}
static uint32_t timestamp_callback(void) {
systime_t t = chVTGetSystemTimeX();
return (uint32_t) ((1000000 / CH_CFG_ST_FREQUENCY) * t);
}
static void sleep_callback(uint32_t us) {
chThdSleepMicroseconds(us);
}
static bool const_heap_write(lbm_uint ix, lbm_uint w) {
if (const_heap_ptr[ix] == w) {
return true;
}
if (const_heap_ptr[ix] != 0xffffffff) {
commands_printf_lisp("Attempted to write to const heap at %d, but it is already occupied", ix);
return false;
}
FLASH_Unlock();
FLASH_ClearFlag(FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR |
FLASH_FLAG_PGPERR | FLASH_FLAG_PGSERR);
FLASH_ProgramWord((uint32_t)(const_heap_ptr + ix), w);
FLASH_Lock();
if (const_heap_ptr[ix] != w) {
return false;
}
return true;
}
static THD_FUNCTION(eval_thread, arg) {
(void)arg;
eval_tp = chThdGetSelfX();
chRegSetThreadName("Lisp Eval");
lbm_run_eval();
lisp_thd_running = false;
}
#pragma GCC pop_options
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