libpayload: Expose options_checksum_valid

options_checksum_valid can be used as a fast test to
identify invalid CMOS data by checking the checksum.

Change-Id: I44635d4c5d389579ad82435907ba8658e1bd44bb
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/586
Reviewed-by: Bernhard Urban <lewurm@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

diff --git a/payloads/libpayload/drivers/options.c b/payloads/libpayload/drivers/options.c
index 33c06596ca7749179cb00eb4473f5bd84061fd9e..1b98cda7218baed968a4936db7bcc2e31ff645ea 100644 (file)
--- a/payloads/libpayload/drivers/options.c
+++ b/payloads/libpayload/drivers/options.c
@@ -57,7 +57,7 @@ struct cb_cmos_option_table *get_system_option_table(void)
        return phys_to_virt(lib_sysinfo.option_table);
 }
 
-static int options_checksum_valid(const struct nvram_accessor *nvram)
+int options_checksum_valid(const struct nvram_accessor *nvram)
 {
        int i;
        int range_start = lib_sysinfo.cmos_range_start / 8;

diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h
index dd98404e940042b44360136255672591f9e1d405..488ad488f8cfb7b33795a4e1960c1d48a632f331 100644 (file)
--- a/payloads/libpayload/include/libpayload.h
+++ b/payloads/libpayload/include/libpayload.h
@@ -203,6 +203,7 @@ extern u8 *mem_accessor_base;
 extern struct nvram_accessor *use_nvram, *use_mem;
 
 struct cb_cmos_option_table *get_system_option_table(void);
+int options_checksum_valid(const struct nvram_accessor *nvram);
 void fix_options_checksum_with(const struct nvram_accessor *nvram);
 void fix_options_checksum(void);
 int get_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *dest, char *name);