libpayload: Add iterators for CMOS variables

[coreboot.git] / payloads / libpayload / drivers / options.c

diff --git a/payloads/libpayload/drivers/options.c b/payloads/libpayload/drivers/options.c
index 1b98cda7218baed968a4936db7bcc2e31ff645ea..10d165ecc713382a4c2c036b9e5049a79c12eaef 100644 (file)
--- a/payloads/libpayload/drivers/options.c
+++ b/payloads/libpayload/drivers/options.c
@@ -171,6 +171,20 @@ static struct cb_cmos_entries *lookup_cmos_entry(struct cb_cmos_option_table *op
        return NULL;
 }
 
+struct cb_cmos_entries *first_cmos_entry(struct cb_cmos_option_table *option_table)
+{
+       return lookup_cmos_entry(option_table, "");
+}
+
+struct cb_cmos_entries *next_cmos_entry(struct cb_cmos_entries *cmos_entry)
+{
+       struct cb_cmos_entries *next = (struct cb_cmos_entries*)((unsigned char *)cmos_entry + cmos_entry->size);
+       if (next->tag == CB_TAG_OPTION)
+               return next;
+       else
+               return NULL;
+}
+
 /* Either value or text must be NULL. Returns the field that matches "the other" for a given config_id */
 static struct cb_cmos_enums *lookup_cmos_enum_core(struct cb_cmos_option_table *option_table, int config_id, u8 *value, char *text)
 {