freebsd-dev/sys/boot/fdt/Makefile

# $FreeBSD$

.PATH:		${.CURDIR}/../../contrib/libfdt/

LIB=		fdt
INTERNALLIB=

# Vendor sources of libfdt.
SRCS+=		fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c \
		fdt_empty_tree.c

# Loader's fdt commands extension sources.
SRCS+=		fdt_loader_cmd.c fdt_overlay.c

CFLAGS+=	-I${.CURDIR}/../../contrib/libfdt/ -I${.CURDIR}/../common/

CFLAGS+=	-ffreestanding

.if ${MACHINE_CPUARCH} == "powerpc" || ${MACHINE_CPUARCH} == "arm" || ${MACHINE_CPUARCH} == "mips"
CFLAGS+=	-msoft-float
.endif

.if ${MACHINE_ARCH} == "powerpc64"
CFLAGS+=	-m32
.endif

CFLAGS+=	-Wformat -Wall

.include <bsd.stand.mk>
.include <bsd.lib.mk>
Initial loader(8) support for Flattened Device Tree. o This is disabled by default for now, and can be enabled using WITH_FDT at build time. o Tested with ARM and PowerPC. Reviewed by: imp Sponsored by: The FreeBSD Foundation 2010-05-25 15:21:39 +00:00			`# $FreeBSD$`

			`.PATH: ${.CURDIR}/../../contrib/libfdt/`

			`LIB= fdt`
			`INTERNALLIB=`

			`# Vendor sources of libfdt.`
Missed change in r276688. Apologies for build breakage. 2015-01-05 16:52:25 +00:00			`SRCS+= fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c \`
			`fdt_empty_tree.c`
Initial loader(8) support for Flattened Device Tree. o This is disabled by default for now, and can be enabled using WITH_FDT at build time. o Tested with ARM and PowerPC. Reviewed by: imp Sponsored by: The FreeBSD Foundation 2010-05-25 15:21:39 +00:00
			`# Loader's fdt commands extension sources.`
Add FDT overlays support to ubldr FDT overlays is de-facto standard for describing expansion boards like Beaglebone capes or Raspberry Pi shields. The ides is to have basic DTB for base board and overlays DTB for shields/capes and to construct final DTB either using human-readable configuration or some self-discovery mechanism. I believe this approach can also be expanded to support dynamically loadable FPGA bitstreams on systems like Zedboard/Zybo. Overlaying process is simmilar to executable link process for binaries: each DTB has "exported" symbols and "undefined" symbols, the latter are resolved using information for the former obtained from base DTB or one of the overlays applied earlier (more rare case). This symbols information is not generated by standard dtc that FreeBSD has in base system, patched[1] version required to produces overlay-compatible blobs. So although DTB files generated by buildkernel do not support overlays there are enough vendor/community-provided DTB blobs ciruclating around to justify committing this change to ubldr. This commit introduces handler for "fdt_overlays" variable that can be defined either as a loader env variable or U-Boot env variable. fdt_overlays is comma-separated list of .dtbo files located in /boot/dtb/ directory along with base .dtb. ubldr loads files and applies them one-by-one to base .dtb and then passes result blob to the kernel. [1] https://github.com/RobertCNelson/dtc/commit/dd6a0533e846e8d5e690a618fa35cc15a6103efb Differential Revision: https://reviews.freebsd.org/D3180 2016-04-29 22:42:59 +00:00			`SRCS+= fdt_loader_cmd.c fdt_overlay.c`
Initial loader(8) support for Flattened Device Tree. o This is disabled by default for now, and can be enabled using WITH_FDT at build time. o Tested with ARM and PowerPC. Reviewed by: imp Sponsored by: The FreeBSD Foundation 2010-05-25 15:21:39 +00:00
Start to allow platforms other than U-Boot to use the FDT code in loader by moving U-Boot specific code from libfdt.a to a new libuboot_fdt.a. This needs to be a new library for linking to work correctly. Differential Revision: https://reviews.freebsd.org/D1054 Reviewed by: ian, rpaulo (earlier version) MFC after: 1 week 2014-11-01 17:12:44 +00:00			`CFLAGS+= -I${.CURDIR}/../../contrib/libfdt/ -I${.CURDIR}/../common/`
Initial loader(8) support for Flattened Device Tree. o This is disabled by default for now, and can be enabled using WITH_FDT at build time. o Tested with ARM and PowerPC. Reviewed by: imp Sponsored by: The FreeBSD Foundation 2010-05-25 15:21:39 +00:00
			`CFLAGS+= -ffreestanding`

When building FDT on MIPS, use softfloat. MFC after: 3 weeks Sponsored by: DARPA, AFRL 2014-02-23 22:12:25 +00:00			`.if ${MACHINE_CPUARCH} == "powerpc" \|\| ${MACHINE_CPUARCH} == "arm" \|\| ${MACHINE_CPUARCH} == "mips"`
Initial loader(8) support for Flattened Device Tree. o This is disabled by default for now, and can be enabled using WITH_FDT at build time. o Tested with ARM and PowerPC. Reviewed by: imp Sponsored by: The FreeBSD Foundation 2010-05-25 15:21:39 +00:00			`CFLAGS+= -msoft-float`
			`.endif`

Provide support in loader for booting 64-bit PowerPC kernels. Like amd64, 64-bit PowerPC kernels are loaded by a 32-bit loader, since nearly all powerpc64 firmwares execute in 32-bit mode. 2010-07-12 00:49:22 +00:00			`.if ${MACHINE_ARCH} == "powerpc64"`
			`CFLAGS+= -m32`
			`.endif`

Initial loader(8) support for Flattened Device Tree. o This is disabled by default for now, and can be enabled using WITH_FDT at build time. o Tested with ARM and PowerPC. Reviewed by: imp Sponsored by: The FreeBSD Foundation 2010-05-25 15:21:39 +00:00			`CFLAGS+= -Wformat -Wall`

So far bsd.stand.mk wasn't included in the following files: sys/boot/fdt/Makefile sys/boot/uboot/fdt/Makefile sys/boot/uboot/lib/Makefile This causes compilation issues on MIPS due to trying to link PIC with non-PIC code. This revision includes bsd.stand.mk in the above files. Reviewed by: imp Approved by: adrian (mentor) Sponsored by: Smartcom - Bulgaria AD Differential Revision: https://reviews.freebsd.org/D5311 2016-02-26 08:16:44 +00:00			`.include <bsd.stand.mk>`
Initial loader(8) support for Flattened Device Tree. o This is disabled by default for now, and can be enabled using WITH_FDT at build time. o Tested with ARM and PowerPC. Reviewed by: imp Sponsored by: The FreeBSD Foundation 2010-05-25 15:21:39 +00:00			`.include <bsd.lib.mk>`