kbuild: automatically include SOCs

This change switches all SOC vendors and southbridges
to be autoincluded by Makefile.inc, rather than having to be
mentioned explicitly in soc/Makefile.inc or in
soc/<vendor>/Makefile.inc.

This means, vendor and SOC directories are now "drop
in", e.g. be placed in the coreboot directory hierarchy
without having to modify any higher level coreboot files.

The long term plan is to enable out of tree components to be
built with a given coreboot version (given that the API did not
change).

Change-Id: Iede26fe184b09c53cec23a545d04953701cbc41d
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/9799
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

25 files changed, 57 insertions, 86 deletions

diff --git a/Makefile.inc b/Makefile.inc
index 628fbdf66f8c..0a05b2f85550 100644
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -54,7 +54,7 @@ PHONY+= clean-abuild coreboot lint lint-stable build-dirs
 # root source directories of coreboot
 subdirs-y := src/lib src/console src/device
 subdirs-y += src/ec/acpi $(wildcard src/ec/*/*) $(wildcard src/southbridge/*/*)
-subdirs-y += src/soc
+subdirs-y += $(wildcard src/soc/*/*)
 subdirs-y += src/northbridge src/superio src/drivers src/cpu src/vendorcode
 subdirs-y += util/cbfstool util/sconfig util/nvramtool util/broadcom
 subdirs-y += $(wildcard src/arch/*)
diff --git a/src/soc/Makefile.inc b/src/soc/Makefile.inc
deleted file mode 100644
index bbcfd2c81b1f..000000000000
--- a/src/soc/Makefile.inc
+++ /dev/null
@@ -1,12 +0,0 @@
-################################################################################
-## Subdirectories
-################################################################################
-subdirs-y += broadcom
-subdirs-y += imgtec
-subdirs-y += intel
-subdirs-y += marvell
-subdirs-y += nvidia
-subdirs-y += qualcomm
-subdirs-y += rockchip
-subdirs-y += samsung
-subdirs-y += ucb
diff --git a/src/soc/broadcom/Makefile.inc b/src/soc/broadcom/Makefile.inc
deleted file mode 100644
index 165f92303245..000000000000
--- a/src/soc/broadcom/Makefile.inc
+++ /dev/null
@@ -1,20 +0,0 @@
-##
-## This file is part of the coreboot project.
-##
-## Copyright 2015 Google Inc.
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; version 2 of the License.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-subdirs-$(CONFIG_SOC_BROADCOM_CYGNUS) += cygnus
diff --git a/src/soc/broadcom/cygnus/Makefile.inc b/src/soc/broadcom/cygnus/Makefile.inc
index 4e09bed86fb4..cfec7d40ef74 100644
--- a/src/soc/broadcom/cygnus/Makefile.inc
+++ b/src/soc/broadcom/cygnus/Makefile.inc
@@ -17,6 +17,8 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
+ifeq ($(CONFIG_SOC_BROADCOM_CYGNUS),y)
+
 bootblock-y += bootblock.c
 bootblock-y += cbmem.c
 bootblock-y += i2c.c
@@ -102,3 +104,5 @@ $(objcbfs)/bootblock.bin: $(objcbfs)/bootblock.tmp \
 	$(objutil)/broadcom/secimage/secimage -out $@ \
 		-config util/broadcom/unauth.cfg \
 		-hmac util/broadcom/khmacsha256 -bl $<
+
+endif
diff --git a/src/soc/imgtec/Makefile.inc b/src/soc/imgtec/Makefile.inc
deleted file mode 100644
index 60a99091a142..000000000000
--- a/src/soc/imgtec/Makefile.inc
+++ /dev/null
@@ -1 +0,0 @@
-subdirs-$(CONFIG_CPU_IMGTEC_PISTACHIO) += pistachio
diff --git a/src/soc/imgtec/pistachio/Makefile.inc b/src/soc/imgtec/pistachio/Makefile.inc
index 0a3d456de3f0..010ddb6835dc 100644
--- a/src/soc/imgtec/pistachio/Makefile.inc
+++ b/src/soc/imgtec/pistachio/Makefile.inc
@@ -19,6 +19,8 @@
 # MA 02110-1301 USA
 #
 
+ifeq ($(CONFIG_CPU_IMGTEC_PISTACHIO),y)
+
 # We enable CBFS_SPI_WRAPPER for Pistachio targets.
 bootblock-y += clocks.c
 bootblock-y += spi.c
@@ -55,3 +57,4 @@ $(objcbfs)/bootblock.bin: $(objcbfs)/bootblock.raw $(BIMGTOOL)
 	@printf "    BIMGTOOL   $(subst $(obj)/,,$(@))\n"
 	$(BIMGTOOL) $< $@ $(call loadaddr,bootblock)
 
+endif
diff --git a/src/soc/intel/Makefile.inc b/src/soc/intel/Makefile.inc
deleted file mode 100644
index f86d6cabcbb3..000000000000
--- a/src/soc/intel/Makefile.inc
+++ /dev/null
@@ -1,3 +0,0 @@
-subdirs-$(CONFIG_SOC_INTEL_BAYTRAIL) += baytrail
-subdirs-$(CONFIG_SOC_INTEL_BROADWELL) += broadwell
-subdirs-$(CONFIG_SOC_INTEL_FSP_BAYTRAIL) += fsp_baytrail
diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc
index 6d28c7868440..78e2da655614 100644
--- a/src/soc/intel/baytrail/Makefile.inc
+++ b/src/soc/intel/baytrail/Makefile.inc
@@ -1,7 +1,8 @@
+ifeq ($(CONFIG_SOC_INTEL_BAYTRAIL),y)
+
 subdirs-y += bootblock
 subdirs-y += microcode
 subdirs-y += romstage
-subdirs-y += ../common
 subdirs-y += ../../../cpu/x86/lapic
 subdirs-y += ../../../cpu/x86/mtrr
 subdirs-y += ../../../cpu/x86/smm
@@ -102,3 +103,5 @@ mrc.bin-position := $(if $(findstring elf,$(CONFIG_MRC_FILE)),$(shell printf "0x
 mrc.bin-type := mrc
 
 PHONY += baytrail_add_me
+
+endif
diff --git a/src/soc/intel/broadwell/Makefile.inc b/src/soc/intel/broadwell/Makefile.inc
index ec6b9ae62a5d..8b4a0c1d2ffd 100644
--- a/src/soc/intel/broadwell/Makefile.inc
+++ b/src/soc/intel/broadwell/Makefile.inc
@@ -1,7 +1,8 @@
+ifeq ($(CONFIG_SOC_INTEL_BROADWELL),y)
+
 subdirs-y += bootblock
 subdirs-y += microcode
 subdirs-y += romstage
-subdirs-y += ../common
 subdirs-y += ../../../cpu/x86/lapic
 subdirs-y += ../../../cpu/x86/mtrr
 subdirs-y += ../../../cpu/x86/smm
@@ -128,3 +129,5 @@ cbfs-files-$(CONFIG_HAVE_MRC) += mrc.bin
 mrc.bin-file := $(call strip_quotes,$(CONFIG_MRC_FILE))
 mrc.bin-position := $(if $(findstring elf,$(CONFIG_MRC_FILE)),$(shell printf "0x%x" $$(( $(mrcelfentry) - $(mrcelfoffset) )) ),$(CONFIG_MRC_BIN_ADDRESS))
 mrc.bin-type := mrc
+
+endif
diff --git a/src/soc/intel/common/Makefile.inc b/src/soc/intel/common/Makefile.inc
index d34030899251..46786e2d1abe 100644
--- a/src/soc/intel/common/Makefile.inc
+++ b/src/soc/intel/common/Makefile.inc
@@ -1,6 +1,10 @@
+ifeq ($(CONFIG_SOC_INTEL_BAYTRAIL)$(CONFIG_SOC_INTEL_BROADWELL),y)
+
 ramstage-y += hda_verb.c
 ramstage-$(CONFIG_CACHE_MRC_SETTINGS) += nvm.c
 ramstage-$(CONFIG_CACHE_MRC_SETTINGS) += mrc_cache.c
 romstage-$(CONFIG_CACHE_MRC_SETTINGS) += mrc_cache.c
 ramstage-$(CONFIG_SOC_INTEL_COMMON_RESET) += reset.c
 romstage-$(CONFIG_SOC_INTEL_COMMON_RESET) += reset.c
+
+endif
diff --git a/src/soc/intel/fsp_baytrail/Makefile.inc b/src/soc/intel/fsp_baytrail/Makefile.inc
index 2dfb9cba633d..af4871cc9172 100644
--- a/src/soc/intel/fsp_baytrail/Makefile.inc
+++ b/src/soc/intel/fsp_baytrail/Makefile.inc
@@ -17,6 +17,9 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 #
+
+ifeq ($(CONFIG_SOC_INTEL_FSP_BAYTRAIL),y)
+
 subdirs-y += microcode
 subdirs-y += romstage
 subdirs-y += ../../../cpu/x86/lapic
@@ -87,3 +90,5 @@ endif
 
 endif
 endif
+
+endif
diff --git a/src/soc/marvell/Makefile.inc b/src/soc/marvell/Makefile.inc
deleted file mode 100644
index ef7bcd9e2e81..000000000000
--- a/src/soc/marvell/Makefile.inc
+++ /dev/null
@@ -1,20 +0,0 @@
-##
-## This file is part of the coreboot project.
-##
-## Copyright 2014 Google Inc.
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; version 2 of the License.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-subdirs-$(CONFIG_SOC_MARVELL_BG4CD) += bg4cd
diff --git a/src/soc/marvell/bg4cd/Makefile.inc b/src/soc/marvell/bg4cd/Makefile.inc
index 4a58e6f8eb43..c433d37666bb 100644
--- a/src/soc/marvell/bg4cd/Makefile.inc
+++ b/src/soc/marvell/bg4cd/Makefile.inc
@@ -17,6 +17,8 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
+ifeq ($(CONFIG_SOC_MARVELL_BG4CD),y)
+
 bootblock-$(CONFIG_VBOOT_VERIFY_FIRMWARE) += bootblock_asm.S
 bootblock-$(CONFIG_VBOOT_VERIFY_FIRMWARE) += bootblock.c
 
@@ -50,3 +52,5 @@ $(objcbfs)/bootblock.bin: $(objcbfs)/bootblock.raw.bin
 	@printf "Generating: $(subst $(obj)/,,$(@))\n"
 	@mkdir -p $(dir $@)
 	@mv $< $@
+
+endif
diff --git a/src/soc/nvidia/Makefile.inc b/src/soc/nvidia/Makefile.inc
deleted file mode 100644
index 100cb940a848..000000000000
--- a/src/soc/nvidia/Makefile.inc
+++ /dev/null
@@ -1,2 +0,0 @@
-subdirs-$(CONFIG_SOC_NVIDIA_TEGRA124) += tegra124
-subdirs-$(CONFIG_SOC_NVIDIA_TEGRA132) += tegra132
diff --git a/src/soc/nvidia/tegra124/Makefile.inc b/src/soc/nvidia/tegra124/Makefile.inc
index 49669ebd838b..78054f451142 100644
--- a/src/soc/nvidia/tegra124/Makefile.inc
+++ b/src/soc/nvidia/tegra124/Makefile.inc
@@ -1,3 +1,5 @@
+ifeq ($(CONFIG_SOC_NVIDIA_TEGRA124),y)
+
 bootblock-y += bootblock.c
 bootblock-y += bootblock_asm.S
 bootblock-y += cbfs.c
@@ -102,3 +104,5 @@ $(objcbfs)/bootblock.bin: $(objcbfs)/bootblock.raw.bin $(BCT_BIN) $(CBOOTIMAGE)
 	echo "BootLoader = $<,$(call loadaddr,bootblock),$(call loadaddr,bootblock),Complete;" >> $(BCT_WRAPPER)
 	@printf "    CBOOTIMAGE $(subst $(obj)/,,$(@))\n"
 	$(CBOOTIMAGE) $(BCT_WRAPPER) $@
+
+endif
diff --git a/src/soc/nvidia/tegra132/Makefile.inc b/src/soc/nvidia/tegra132/Makefile.inc
index bfa70885d307..44976d17bd82 100644
--- a/src/soc/nvidia/tegra132/Makefile.inc
+++ b/src/soc/nvidia/tegra132/Makefile.inc
@@ -1,3 +1,5 @@
+ifeq ($(CONFIG_SOC_NVIDIA_TEGRA132),y)
+
 bootblock-y += bootblock.c
 bootblock-y += bootblock_asm.S
 bootblock-y += cbfs.c
@@ -150,3 +152,5 @@ MTS_FILE_CBFS = mts
 cbfs-files-y += $(MTS_FILE_CBFS)
 $(MTS_FILE_CBFS)-file := $(MTS_FILE)
 $(MTS_FILE_CBFS)-type := raw
+
+endif
diff --git a/src/soc/qualcomm/Makefile.inc b/src/soc/qualcomm/Makefile.inc
deleted file mode 100644
index 06b2f2f2c346..000000000000
--- a/src/soc/qualcomm/Makefile.inc
+++ /dev/null
@@ -1 +0,0 @@
-subdirs-$(CONFIG_SOC_QC_IPQ806X) += ipq806x
diff --git a/src/soc/qualcomm/ipq806x/Makefile.inc b/src/soc/qualcomm/ipq806x/Makefile.inc
index 6aa10f8f7be7..3eb070e45216 100644
--- a/src/soc/qualcomm/ipq806x/Makefile.inc
+++ b/src/soc/qualcomm/ipq806x/Makefile.inc
@@ -17,6 +17,8 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
+ifeq ($(CONFIG_SOC_QC_IPQ806X),y)
+
 bootblock-y += clock.c
 bootblock-y += gpio.c
 bootblock-$(CONFIG_SPI_FLASH) += spi.c
@@ -88,3 +90,5 @@ mbn-root := 3rdparty/cpu/qualcomm/ipq806x
 $(foreach f,$(mbn-files),$(eval cbfs-files-y += $(f))\
 	  $(eval $(f)-file := $(mbn-root)/$(f))\
 	  $(eval $(f)-type := raw))
+
+endif
diff --git a/src/soc/rockchip/Makefile.inc b/src/soc/rockchip/Makefile.inc
deleted file mode 100644
index aa67f5c1cfae..000000000000
--- a/src/soc/rockchip/Makefile.inc
+++ /dev/null
@@ -1,20 +0,0 @@
-##
-## This file is part of the coreboot project.
-##
-## Copyright 2014 Rockchip Inc.
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; version 2 of the License.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-subdirs-$(CONFIG_SOC_ROCKCHIP_RK3288) += rk3288
diff --git a/src/soc/rockchip/rk3288/Makefile.inc b/src/soc/rockchip/rk3288/Makefile.inc
index 441a97fb8456..be4132732120 100644
--- a/src/soc/rockchip/rk3288/Makefile.inc
+++ b/src/soc/rockchip/rk3288/Makefile.inc
@@ -17,6 +17,8 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
+ifeq ($(CONFIG_SOC_ROCKCHIP_RK3288),y)
+
 IDBTOOL = util/rockchip/make_idb.py
 
 #bootblock-y += bootblock.c
@@ -79,3 +81,5 @@ $(objcbfs)/bootblock.bin: $(objcbfs)/bootblock.raw.bin
 	@printf "Generating: $(subst $(obj)/,,$(@))\n"
 	@mkdir -p $(dir $@)
 	@$(IDBTOOL) --from=$< --to=$@ --enable-align
+
+endif
diff --git a/src/soc/samsung/Makefile.inc b/src/soc/samsung/Makefile.inc
deleted file mode 100644
index 496b5f7be3c7..000000000000
--- a/src/soc/samsung/Makefile.inc
+++ /dev/null
@@ -1,2 +0,0 @@
-subdirs-$(CONFIG_CPU_SAMSUNG_EXYNOS5250) += exynos5250
-subdirs-$(CONFIG_CPU_SAMSUNG_EXYNOS5420) += exynos5420
diff --git a/src/soc/samsung/exynos5250/Makefile.inc b/src/soc/samsung/exynos5250/Makefile.inc
index 65256373827d..1cde3495020c 100644
--- a/src/soc/samsung/exynos5250/Makefile.inc
+++ b/src/soc/samsung/exynos5250/Makefile.inc
@@ -1,3 +1,5 @@
+ifeq ($(CONFIG_CPU_SAMSUNG_EXYNOS5250),y)
+
 bootblock-y += spi.c alternate_cbfs.c
 bootblock-y += bootblock.c
 bootblock-y += pinmux.c timer.c power.c
@@ -51,3 +53,5 @@ $(objcbfs)/bootblock.bin: $(objcbfs)/bootblock.raw.bin
 	@printf "    BL1, CKSUM $(subst $(obj)/,,$(@))\n"
 	util/exynos/fixed_cksum.py $< $<.cksum 32768
 	cat 3rdparty/cpu/samsung/exynos5250/bl1.bin $<.cksum > $@
+
+endif
diff --git a/src/soc/samsung/exynos5420/Makefile.inc b/src/soc/samsung/exynos5420/Makefile.inc
index 7eb407e9573b..e42fc9aebf34 100644
--- a/src/soc/samsung/exynos5420/Makefile.inc
+++ b/src/soc/samsung/exynos5420/Makefile.inc
@@ -1,3 +1,5 @@
+ifeq ($(CONFIG_CPU_SAMSUNG_EXYNOS5420),y)
+
 bootblock-y += spi.c alternate_cbfs.c
 bootblock-y += bootblock.c
 bootblock-y += pinmux.c timer.c power.c
@@ -53,3 +55,5 @@ $(objcbfs)/bootblock.bin: $(objcbfs)/bootblock.raw.bin
 	@printf "    BL1, CKSUM $(subst $(obj)/,,$(@))\n"
 	util/exynos/variable_cksum.py $< $<.cksum
 	cat 3rdparty/cpu/samsung/exynos5420/bl1.bin $<.cksum > $@
+
+endif
diff --git a/src/soc/ucb/Makefile.inc b/src/soc/ucb/Makefile.inc
deleted file mode 100644
index fe4074248482..000000000000
--- a/src/soc/ucb/Makefile.inc
+++ /dev/null
@@ -1 +0,0 @@
-subdirs-$(CONFIG_SOC_UCB_RISCV) += riscv
diff --git a/src/soc/ucb/riscv/Makefile.inc b/src/soc/ucb/riscv/Makefile.inc
index c25a2fccdb82..1072a2b32ec9 100644
--- a/src/soc/ucb/riscv/Makefile.inc
+++ b/src/soc/ucb/riscv/Makefile.inc
@@ -1,3 +1,6 @@
-romstage-y += cbmem.c
+ifeq ($(CONFIG_SOC_UCB_RISCV),y)
 
+romstage-y += cbmem.c
 ramstage-y += cbmem.c
+
+endif