From ab1981db9ea793accf1279446b9f7666a3be04ca Mon Sep 17 00:00:00 2001 From: Louis Mayencourt Date: Thu, 8 Aug 2019 12:03:26 +0100 Subject: 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 --- bl2/bl2.ld.S | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'bl2') diff --git a/bl2/bl2.ld.S b/bl2/bl2.ld.S index 6230562ed..c1338e22d 100644 --- a/bl2/bl2.ld.S +++ b/bl2/bl2.ld.S @@ -1,5 +1,5 @@ /* - * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ @@ -46,6 +46,11 @@ SECTIONS __RODATA_START__ = .; *(SORT_BY_ALIGNMENT(.rodata*)) + . = ALIGN(8); + __FCONF_POPULATOR_START__ = .; + KEEP(*(.fconf_populator)) + __FCONF_POPULATOR_END__ = .; + /* Ensure 8-byte alignment for descriptors and ensure inclusion */ . = ALIGN(8); __PARSER_LIB_DESCS_START__ = .; @@ -62,6 +67,11 @@ SECTIONS *(SORT_BY_ALIGNMENT(.text*)) *(SORT_BY_ALIGNMENT(.rodata*)) + . = ALIGN(8); + __FCONF_POPULATOR_START__ = .; + KEEP(*(.fconf_populator)) + __FCONF_POPULATOR_END__ = .; + /* Ensure 8-byte alignment for descriptors and ensure inclusion */ . = ALIGN(8); __PARSER_LIB_DESCS_START__ = .; -- cgit v1.2.3