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-rw-r--r--util/nvramtool/cli/nvramtool.c37
1 files changed, 26 insertions, 11 deletions
diff --git a/util/nvramtool/cli/nvramtool.c b/util/nvramtool/cli/nvramtool.c
index 23de093fa086..9bc3e4e5251e 100644
--- a/util/nvramtool/cli/nvramtool.c
+++ b/util/nvramtool/cli/nvramtool.c
@@ -102,13 +102,9 @@ int main(int argc, char *argv[])
parse_nvramtool_args(argc, argv);
- if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].found) {
- set_layout_filename(nvramtool_op_modifiers
- [NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].param);
- fn = get_layout_from_file;
- } else if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_OPT_TABLE].found) {
- fn = get_layout_from_cmos_table;
- } else if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CBFS_FILE].found) {
+ /* If we should operate on a CBFS file default to reading the layout
+ * and CMOS contents from it. */
+ if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CBFS_FILE].found) {
open_cbfs(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CBFS_FILE].param);
if (!nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].found) {
cmos_default = cbfs_find_file("cmos.default", CBFS_COMPONENT_CMOS_DEFAULT, NULL);
@@ -117,36 +113,55 @@ int main(int argc, char *argv[])
exit(1);
}
}
+ fn = get_layout_from_cbfs_file;
}
+
+ /* If the user wants to use a specific layout file or explicitly use
+ * the coreboot option table allow him to override previous settings. */
+ if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].found) {
+ set_layout_filename(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].param);
+ fn = get_layout_from_file;
+ } else if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_OPT_TABLE].found) {
+ fn = get_layout_from_cmos_table;
+ }
+
+ /* Allow the user to use a file for the CMOS contents, possibly
+ * overriding a previously opened "cmos.default" file from the CBFS. */
if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].found) {
- int fd;
struct stat fd_stat;
- if ((fd = open(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param, O_RDWR | O_CREAT, 0666)) < 0) {
+ int fd;
+
+ if ((fd = open(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param, O_RDWR | O_CREAT, 0666)) < 0) {
fprintf(stderr, "Couldn't open '%s'\n", nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param);
exit(1);
}
+
if (fstat(fd, &fd_stat) == -1) {
fprintf(stderr, "Couldn't stat '%s'\n", nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param);
exit(1);
}
+
if (fd_stat.st_size < 128) {
lseek(fd, 127, SEEK_SET);
write(fd, "\0", 1);
fsync(fd);
}
+
cmos_default = mmap(NULL, 128, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (cmos_default == MAP_FAILED) {
fprintf(stderr, "Couldn't map '%s'\n", nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param);
exit(1);
}
}
+
+ /* Switch to memory based CMOS access. */
if (cmos_default) {
select_hal(HAL_MEMORY, cmos_default);
- fn = get_layout_from_cbfs_file;
}
register_cmos_layout_get_fn(fn);
- op_fns[nvramtool_op.op] ();
+ op_fns[nvramtool_op.op]();
+
return 0;
}