diff options
Diffstat (limited to 'common/cli_readline.c')
| -rw-r--r-- | common/cli_readline.c | 36 |
1 files changed, 25 insertions, 11 deletions
diff --git a/common/cli_readline.c b/common/cli_readline.c index 99e7efdfe55..cf4339d0e50 100644 --- a/common/cli_readline.c +++ b/common/cli_readline.c @@ -86,6 +86,9 @@ static int hist_add_idx; static int hist_cur = -1; static unsigned hist_num; +#ifndef CONFIG_CMD_HISTORY_USE_CALLOC +static char hist_data[HIST_MAX][HIST_SIZE + 1]; +#endif static char *hist_list[HIST_MAX]; #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) @@ -100,20 +103,26 @@ static void getcmd_putchars(int count, int ch) static int hist_init(void) { - unsigned char *hist; int i; - hist_max = 0; - hist_add_idx = 0; - hist_cur = -1; - hist_num = 0; - - hist = calloc(HIST_MAX, HIST_SIZE + 1); +#ifndef CONFIG_CMD_HISTORY_USE_CALLOC + for (i = 0; i < HIST_MAX; i++) { + hist_list[i] = hist_data[i]; + hist_list[i][0] = '\0'; + } +#else + unsigned char *hist = calloc(HIST_MAX, HIST_SIZE + 1); if (!hist) panic("%s: calloc: out of memory!\n", __func__); for (i = 0; i < HIST_MAX; i++) hist_list[i] = hist + (i * (HIST_SIZE + 1)); +#endif + + hist_max = 0; + hist_add_idx = 0; + hist_cur = -1; + hist_num = 0; return 0; } @@ -643,10 +652,15 @@ int cli_readline_into_buffer(const char *const prompt, char *buffer, static int initted; /* - * History uses a global array which is not - * writable until after relocation to RAM. - * Revert to non-history version if still - * running from flash. + * Say N to CMD_HISTORY_USE_CALLOC will skip runtime + * allocation for the history buffer and directly + * use an uninitialized static array as the buffer. + * Doing this might have better performance and not + * increase the binary file's size, as it only marks + * the size. However, the array is only writable after + * relocation to RAM. If u-boot is running from ROM + * all the time, consider say Y to CMD_HISTORY_USE_CALLOC + * or disable CMD_HISTORY. */ if (IS_ENABLED(CONFIG_CMDLINE_EDITING) && (gd->flags & GD_FLG_RELOC)) { if (!initted) { |