fconf: initial commit
Introduce the Firmware CONfiguration Framework (fconf).
The fconf is an abstraction layer for platform specific data, allowing
a "property" to be queried and a value retrieved without the requesting
entity knowing what backing store is being used to hold the data.
The default backing store used is C structure. If another backing store
has to be used, the platform integrator needs to provide a "populate()"
function to fill the corresponding C structure.
The "populate()" function must be registered to the fconf framework with
the "FCONF_REGISTER_POPULATOR()". This ensures that the function would
be called inside the "fconf_populate()" function.
A two level macro is used as getter:
- the first macro takes 3 parameters and converts it to a function
call: FCONF_GET_PROPERTY(a,b,c) -> a__b_getter(c).
- the second level defines a__b_getter(c) to the matching C structure,
variable, array, function, etc..
Ex: Get a Chain of trust property:
1) FCONF_GET_PROPERY(tbbr, cot, BL2_id) -> tbbr__cot_getter(BL2_id)
2) tbbr__cot_getter(BL2_id) -> cot_desc_ptr[BL2_id]
Change-Id: Id394001353ed295bc680c3f543af0cf8da549469
Signed-off-by: Louis Mayencourt <louis.mayencourt@arm.com>
diff --git a/drivers/auth/auth_mod.c b/drivers/auth/auth_mod.c
index 3fb2d1a..91ee1be 100644
--- a/drivers/auth/auth_mod.c
+++ b/drivers/auth/auth_mod.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -16,6 +16,7 @@
#include <drivers/auth/auth_mod.h>
#include <drivers/auth/crypto_mod.h>
#include <drivers/auth/img_parser_mod.h>
+#include <lib/fconf/fconf_tbbr_getter.h>
#include <plat/common/platform.h>
/* ASN.1 tags */
@@ -302,9 +303,8 @@
const auth_img_desc_t *img_desc = NULL;
assert(parent_id != NULL);
-
/* Get the image descriptor */
- img_desc = cot_desc_ptr[img_id];
+ img_desc = FCONF_GET_PROPERTY(tbbr, cot, img_id);
/* Check if the image has no parent (ROT) */
if (img_desc->parent == NULL) {
@@ -353,7 +353,7 @@
int rc, i;
/* Get the image descriptor from the chain of trust */
- img_desc = cot_desc_ptr[img_id];
+ img_desc = FCONF_GET_PROPERTY(tbbr, cot, img_id);
/* Ask the parser to check the image integrity */
rc = img_parser_check_integrity(img_desc->img_type, img_ptr, img_len);