[Buildroot] [PATCH v4 3/5] boot/opensbi: Initial commit of OpenSBI for RISC-V

[Thomas Petazzoni <thomas.petazzoni@bootlin.com>]

Hello,

I was about to apply this patch, but there is still an issue (see
below). Since a new iteration will be needed, I'll point out some minor
nits as well that I would have normally fixed myself when applying, but
that you can fix together with the more significant issue.

First minor nit: the commit title should be "boot/opensbi: new package"

On Tue, 19 Mar 2019 18:15:48 +0000
Alistair Francis <Alistair.Francis@wdc.com> wrote:


> diff --git a/boot/opensbi/opensbi.mk b/boot/opensbi/opensbi.mk
> new file mode 100644
> index 0000000000..13dffb9ce0
> --- /dev/null
> +++ b/boot/opensbi/opensbi.mk
> @@ -0,0 +1,32 @@
> +################################################################################
> +#
> +# OpenSBI

opensbi in lower-case

> +#
> +################################################################################
> +
> +OPENSBI_VERSION = v0.3
> +OPENSBI_SITE = $(call github,riscv,opensbi,$(OPENSBI_VERSION))
> +OPENSBI_LICENSE = BSD-2-Clause
> +OPENSBI_LICENSE_FILES = COPYING.BSD
> +OPENSBI_INSTALL_IMAGES = YES
> +
> +OPENSBI_MAKE_ENV = \
> +	CROSS_COMPILE=$(TARGET_CROSS)
> +
> +OPENSBI_PLAT = $(call qstrip,$(BR2_TARGET_OPENSBI_PLAT))
> +ifneq ($(OPENSBI_PLAT),)
> +OPENSBI_MAKE_ENV += PLATFORM=$(OPENSBI_PLAT)
> +endif
> +
> +define OPENSBI_BUILD_CMDS
> +	$(TARGET_MAKE_ENV) $(OPENSBI_MAKE_ENV) $(MAKE) -C $(@D)
> +endef
> +
> +ifneq ($(OPENSBI_PLAT),)
> +define OPENSBI_INSTALL_IMAGES_CMDS
> +	$(INSTALL) -m 0644 -D $(@D)/build/platform/$(OPENSBI_PLAT)/firmware/fw_jump.bin $(BINARIES_DIR)/fw_jump.bin
> +	$(INSTALL) -m 0644 -D $(@D)/build/platform/$(OPENSBI_PLAT)/firmware/fw_jump.elf $(BINARIES_DIR)/fw_jump.elf
> +endef
> +endif

So the issue that I have is that this package doesn't install anything
when OPENSBI_PLAT is empty. It doesn't install any image, it doesn't
install any library to STAGING_DIR.

Should the libplatsbi.a library be installed in
$(STAGING_DIR)/usr/lib ? This location is normally for regular Linux
user-space libraries, which I suppose libplatsbi.a is not. Perhaps it
should be in another location ?

In any case, it should be installed somewhere, otherwise the package is
pretty meaningless when OPENSBI_PLAT is empty.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com