1#
2# Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
3#
4# SPDX-License-Identifier: BSD-3-Clause
5#
6
7################################################################################
8# Helpers for finding and referencing platform directories
9################################################################################
10
11ifndef PLAT_HELPERS_MK
12    PLAT_HELPERS_MK := $(lastword $(MAKEFILE_LIST))
13
14    ifeq (${PLAT},)
15        $(error "Error: Unknown platform. Please use PLAT=<platform name> to specify the platform")
16    endif
17
18    # TF_PLATFORM_ROOT can be overridden for when building tools directly
19    TF_PLATFORM_ROOT               ?= plat/
20    PLAT_MAKEFILE               := platform.mk
21
22    # Generate the platforms list by recursively searching for all directories
23    # under /plat containing a PLAT_MAKEFILE. Append each platform with a `|`
24    # char and strip out the final '|'.
25    ALL_PLATFORM_MK_FILES       := $(call rwildcard,${TF_PLATFORM_ROOT},${PLAT_MAKEFILE})
26    ALL_PLATFORM_DIRS           := $(patsubst %/,%,$(dir ${ALL_PLATFORM_MK_FILES}))
27    ALL_PLATFORMS               := $(sort $(notdir ${ALL_PLATFORM_DIRS}))
28
29    PLAT_MAKEFILE_FULL          := $(filter %/${PLAT}/${PLAT_MAKEFILE},${ALL_PLATFORM_MK_FILES})
30    PLATFORM_LIST               := $(subst ${space},|,${ALL_PLATFORMS})
31    ifeq ($(PLAT_MAKEFILE_FULL),)
32        $(error "Error: Invalid platform. The following platforms are available: ${PLATFORM_LIST}")
33    endif
34
35    # Record the directory where the platform make file was found.
36    PLAT_DIR                    := $(dir ${PLAT_MAKEFILE_FULL})
37
38endif
39