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Tegra: dummy support for the io_storage backend

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This patch provides dummy macros and platform files to compile
the io_storage driver backend. This patch is necessary to
remove the "--unresolved=el3_panic" linker flag from Tegra's
makefiles and allow us to revert this workaround, previously
suggested by the ARM toolchain team.

The "--unresolved=el3_panic" flag actually was a big hammer that
allowed Tegra platforms to work with armlink previously but it
masks legit errors with the code as well.

Change-Id: I0421d35657823215229f84231896b84167f90548
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
This commit is contained in:
Varun Wadekar 2019-03-01 10:18:35 -08:00
parent af3816789d
commit 8d56e24bb3
4 changed files with 30 additions and 3 deletions
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4
plat/nvidia/tegra/common/tegra_common.mk
View file

@ -1,5 +1,5 @@
#
# Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
# Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@ -22,6 +22,7 @@ TEGRA_GICv2_SOURCES := drivers/arm/gic/common/gic_common.c \
BL31_SOURCES += drivers/console/aarch64/console.S \
drivers/delay_timer/delay_timer.c \
drivers/io/io_storage.c \
${TEGRA_GICv2_SOURCES} \
${COMMON_DIR}/aarch64/tegra_helpers.S \
${COMMON_DIR}/drivers/pmc/pmc.c \
@ -29,6 +30,7 @@ BL31_SOURCES += drivers/console/aarch64/console.S \
${COMMON_DIR}/tegra_bl31_setup.c \
${COMMON_DIR}/tegra_delay_timer.c \
${COMMON_DIR}/tegra_fiq_glue.c \
${COMMON_DIR}/tegra_io_storage.c \
${COMMON_DIR}/tegra_platform.c \
${COMMON_DIR}/tegra_pm.c \
${COMMON_DIR}/tegra_sip_calls.c \

20
plat/nvidia/tegra/common/tegra_io_storage.c Normal file
View file

@ -0,0 +1,20 @@
/*
* Copyright (c) 2019, NVIDIA Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <errno.h>
#include <plat/common/platform.h>
/*
* Return an IO device handle and specification which can be used to access
* an image. Use this to enforce platform load policy.
*
* This function is not supported at this time
*/
int plat_get_image_source(unsigned int image_id, uintptr_t *dev_handle,
uintptr_t *image_spec)
{
return -ENOTSUP;
}

6
plat/nvidia/tegra/include/platform_def.h
View file

@ -66,4 +66,10 @@
#define CACHE_WRITEBACK_SHIFT 6
#define CACHE_WRITEBACK_GRANULE (0x40) /* (U(1) << CACHE_WRITEBACK_SHIFT) */
/*******************************************************************************
* Dummy macros to compile io_storage support
******************************************************************************/
#define MAX_IO_DEVICES U(0)
#define MAX_IO_HANDLES U(0)
#endif /* PLATFORM_DEF_H */

3
plat/nvidia/tegra/platform.mk
View file

@ -1,5 +1,5 @@
#
# Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
# Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@ -68,7 +68,6 @@ ifneq ($(findstring armlink,$(notdir $(LD))),)
# o resolve undefined symbols to el3_panic
# o include only required sections
TF_LDFLAGS += --diag_suppress=L6314,L6332 --no_scanlib --callgraph
TF_LDFLAGS += --unresolved=el3_panic
TF_LDFLAGS += --keep="*(__pubsub*)" --keep="*(rt_svc_descs*)" --keep="*(*cpu_ops)"
ifeq (${ENABLE_PMF},1)
TF_LDFLAGS += --keep="*(*pmf_svc_descs*)"