Hi,
On 6/9/22 14:29, Sughosh Ganu wrote:
The FWU Multi Bank Update feature supports updation of firmware images
to one of multiple sets(also called banks) of images. The firmware
images are clubbed together in banks, with the system booting images
from the active bank. Information on the images such as which bank
they belong to is stored as part of the metadata structure, which is
stored on the same storage media as the firmware images on a dedicated
partition.
At the time of update, the metadata is read to identify the bank to
which the images need to be flashed(update bank). On a successful
update, the metadata is modified to set the updated bank as active
bank to subsequently boot from.
Signed-off-by: Sughosh Ganu <sughosh.g...@linaro.org>
---
include/fwu.h | 12 +-
lib/Kconfig | 6 +
lib/Makefile | 1 +
lib/efi_loader/efi_capsule.c | 231 ++++++++++++++++++++++++++++++++++-
lib/efi_loader/efi_setup.c | 3 +-
lib/fwu_updates/Kconfig | 31 +++++
lib/fwu_updates/Makefile | 6 +
lib/fwu_updates/fwu.c | 26 ++++
8 files changed, 309 insertions(+), 7 deletions(-)
create mode 100644 lib/fwu_updates/Kconfig
create mode 100644 lib/fwu_updates/Makefile
[...]
diff --git a/lib/fwu_updates/fwu.c b/lib/fwu_updates/fwu.c
index af884439fb..422ef58661 100644
--- a/lib/fwu_updates/fwu.c
+++ b/lib/fwu_updates/fwu.c
@@ -112,6 +112,32 @@ u8 fwu_update_checks_pass(void)
return !trial_state && boottime_check;
}
+int fwu_trial_state_ctr_start(void)
+{
+ int ret;
+ u32 var_attributes;
+ efi_status_t status;
+ efi_uintn_t var_size;
+ u16 trial_state_ctr;
+
+ var_size = (efi_uintn_t)sizeof(trial_state_ctr);
+ var_attributes = EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS;
+
+ trial_state_ctr = ret = 0;
+ status = efi_set_variable_int(L"TrialStateCtr",
+ &efi_global_variable_guid,
+ var_attributes,
+ var_size,
+ &trial_state_ctr, false);
u"TrialStateCtr",
if USC2 is not mandatory.
+ if (status != EFI_SUCCESS) {
+ log_err("Unable to increment TrialStateCtr variable\n");
+ ret = -1;
+ }
+
+ return ret;
+}
+
int fwu_boottime_checks(void)
{
int ret;
Regards
