feat(fwu): add a function to obtain an alternate FWU bank to boot
Add a function fwu_get_alternate_boot_bank() to return a valid bank to
boot from. This function can be called by a platform to get an
alternate bank to try to boot the platform in the unlikely scenario of
the active bank being in an invalid state, or if the number of times
the platform boots in trial state exceeds a pre-set count.
Change-Id: I4bcd88e68e334c452882255bf028e01b090369d1
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
diff --git a/include/drivers/fwu/fwu.h b/include/drivers/fwu/fwu.h
index 489d4a1..18e8a31 100644
--- a/include/drivers/fwu/fwu.h
+++ b/include/drivers/fwu/fwu.h
@@ -13,8 +13,11 @@
#define FWU_BANK_STATE_VALID 0xFEU
#define FWU_BANK_STATE_INVALID 0xFFU
+#define INVALID_BOOT_IDX 0xFFFFFFFFU
+
void fwu_init(void);
uint32_t fwu_get_active_bank_state(void);
+uint32_t fwu_get_alternate_boot_bank(void);
const struct fwu_metadata *fwu_get_metadata(void);
#endif /* FWU_H */