msm8953 & msm8996 : Append "rootfstype=" and "root=" to kernel command line
This change is to get the system partition index and append it to kernel
command line instead of hardcoding the value in .conf files
used during the LE build process
Change-Id: I1b9e7744e0b95246e45911682cbb5c3ff61e9dab
diff --git a/target/msm8996/init.c b/target/msm8996/init.c
index 20a4caf..dc3186d 100644
--- a/target/msm8996/init.c
+++ b/target/msm8996/init.c
@@ -668,3 +668,59 @@
return len;
}
+
+#if _APPEND_CMDLINE
+int get_target_boot_params(const char *cmdline, const char *part, char **buf)
+{
+ int system_ptn_index = -1;
+ unsigned int lun = 0;
+ char lun_char_base = 'a', lun_char_limit = 'h';
+
+ /*allocate buflen for largest possible string*/
+ uint32_t buflen = strlen(" root=/dev/mmcblock0p") + sizeof(int) + 1; /*1 character for null termination*/
+
+ if (!cmdline || !part ) {
+ dprintf(CRITICAL, "WARN: Invalid input param\n");
+ return -1;
+ }
+
+ system_ptn_index = partition_get_index(part);
+ if (system_ptn_index == -1)
+ {
+ dprintf(CRITICAL,"Unable to find partition %s\n",part);
+ return -1;
+ }
+
+ *buf = (char *)malloc(buflen);
+ if(!(*buf)) {
+ dprintf(CRITICAL,"Unable to allocate memory for boot params\n");
+ return -1;
+ }
+
+ /*
+ * check if cmdline contains "root="/"" at the beginning of buffer or
+ * " root="/"ubi.mtd" in the middle of buffer.
+ */
+ if ((strncmp(cmdline," root=",strlen(" root=")) == 0) ||
+ strstr(cmdline, " root="))
+ dprintf(DEBUG, "DEBUG: cmdline has root=\n");
+ else
+ {
+ if (platform_boot_dev_isemmc()) {
+ snprintf(*buf, buflen, " root=/dev/mmcblock0p%d",
+ system_ptn_index + 1);
+ } else {
+ lun = partition_get_lun(system_ptn_index);
+ if ((lun_char_base + lun) > lun_char_limit) {
+ dprintf(CRITICAL, "lun value exceeds limit\n");
+ return -1;
+ }
+ snprintf(*buf, buflen, " root=/dev/sd%c%d",
+ lun_char_base + lun,
+ partition_get_index_in_lun(part, lun));
+ }
+ }
+ /*in success case buf will be freed in the calling function of this*/
+ return 0;
+}
+#endif