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--- a/cmd/pstore.c
+++ b/cmd/pstore.c
@@ -207,6 +207,58 @@ static int pstore_set(struct cmd_tbl *cm
}
/**
+ * pstore_check() - Check for pstore records
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Return: 0 if there are records in pstore, 1 otherwise
+ */
+static int pstore_check(struct cmd_tbl *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ phys_addr_t ptr;
+ char *buffer;
+ u32 size;
+ int header_len = 0;
+ bool compressed;
+
+ if (pstore_length == 0) {
+ printf("Please set PStore configuration\n");
+ return CMD_RET_USAGE;
+ }
+
+ if (buffer_size == 0)
+ pstore_init_buffer_size();
+
+ buffer = malloc_cache_aligned(buffer_size);
+
+ ptr = pstore_addr;
+ phys_addr_t ptr_end = ptr + pstore_length - pstore_pmsg_size
+ - pstore_ftrace_size - pstore_console_size;
+
+ while (ptr < ptr_end) {
+ size = pstore_get_buffer(PERSISTENT_RAM_SIG, ptr,
+ pstore_record_size, buffer);
+ ptr += pstore_record_size;
+
+ if (size == 0)
+ continue;
+
+ header_len = pstore_read_kmsg_hdr(buffer, &compressed);
+ if (header_len == 0)
+ continue;
+
+ free(buffer);
+ return 0;
+ }
+
+ free(buffer);
+ return 1;
+}
+
+/**
* pstore_print_buffer() - Print buffer
* @type: buffer type
* @buffer: buffer to print
@@ -458,6 +510,7 @@ static int pstore_save(struct cmd_tbl *c
static struct cmd_tbl cmd_pstore_sub[] = {
U_BOOT_CMD_MKENT(set, 8, 0, pstore_set, "", ""),
+ U_BOOT_CMD_MKENT(check, 1, 0, pstore_check, "", ""),
U_BOOT_CMD_MKENT(display, 3, 0, pstore_display, "", ""),
U_BOOT_CMD_MKENT(save, 4, 0, pstore_save, "", ""),
};
@@ -531,6 +584,8 @@ U_BOOT_CMD(pstore, 10, 0, do_pstore,
" 'pmsg-size' is the size of the user space logs record.\n"
" 'ecc-size' enables/disables ECC support and specifies ECC buffer size in\n"
" bytes (0 disables it, 1 is a special value, means 16 bytes ECC).\n"
+ "pstore check\n"
+ "- Returns true if there are records in pstore.\n"
"pstore display [record-type] [nb]\n"
"- Display existing records in pstore reserved memory. A 'record-type' can\n"
" be given to only display records of this kind. 'record-type' can be one\n"
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