[Buildroot] [PATCH 2/2] ti-pru-support: add staging files for PRU firmware

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello,

On Wed, 16 Nov 2016 14:24:33 -0500, Ash Charles wrote:

> diff --git a/package/Config.in b/package/Config.in
> index 9ed296f..4f333c2 100644
> --- a/package/Config.in
> +++ b/package/Config.in
> @@ -463,6 +463,7 @@ endmenu
>  	source "package/sysstat/Config.in"
>  	source "package/targetcli-fb/Config.in"
>  	source "package/ti-gfx/Config.in"
> +	source "package/ti-pru-support/Config.in"
>  	source "package/ti-sgx-demos/Config.in"
>  	source "package/ti-sgx-km/Config.in"
>  	source "package/ti-sgx-um/Config.in"
> diff --git a/package/ti-pru-support/Config.in b/package/ti-pru-support/Config.in
> new file mode 100644
> index 0000000..af17d54
> --- /dev/null
> +++ b/package/ti-pru-support/Config.in
> @@ -0,0 +1,10 @@
> +config BR2_PACKAGE_TI_PRU_SUPPORT
> +	bool "TI PRU support"
> +	select BR2_PACKAGE_HOST_TI_CGT_PRU
> +	help
> +	  This package provides useful headers and libraries for the
> +	  PRU unit found on some TI processors e.g. AM3358.  This
> +	  package provides staging only; the included labs and
> +	  examples aren't built.

It would be nice to have a sub-option to build examples, so that it can
potentially installs things in the target.

> +
> +	  https://git.ti.com/pru-software-support-package/pru-software-support-package/trees/master

Just:

	https://git.ti.com/pru-software-support-package/

> +TI_PRU_SUPPORT_VERSION = 804b548e69ef9fdf44445f6d0968d81cb8a1e7b4
> +TI_PRU_SUPPORT_SITE = "git://git.ti.com/pru-software-support-package/pru-software-support-package.git"

Double quotes not needed.

> +TI_PRU_SUPPORT_LICENSE =  BSD-3c, GPLv2
> +TI_PRU_SUPPORT_LICENSE_FILES = PRU_Package-v5.0-Manifest.html
> +TI_PRU_SUPPORT_INSTALL_STAGING = YES
> +TI_PRU_SUPPORT_DEPENDENCIES = host-ti-cgt-pru
> +
> +define TI_PRU_SUPPORT_BUILD_CMDS
> +	$(MAKE) PRU_CGT=$(PRU_CGT) -C $(@D)/lib/src
> +endef
> +
> +define TI_PRU_SUPPORT_INSTALL_STAGING_CMDS
> +	$(INSTALL) -d $(STAGING_DIR)/usr/include
> +	cp -af $(@D)/include/* $(STAGING_DIR)/usr/include
> +	$(INSTALL) -d $(STAGING_DIR)/usr/lib
> +	$(INSTALL) -m 0644 $(@D)/lib/src/*/gen/*.lib $(STAGING_DIR)/usr/lib/

My understanding is that those libraries are not for the ARM CPU, but
for the PRU. If that's the case, then I believe having them in
STAGING_DIR/usr/{include,lib} can cause a lot of confusion. They should
be installed in a separate place, so that they are not picked up by the
regular ARM cross-compiler.

How does one load/run the PRU programs? Any tool that needs to be
executed on the ARM side, and which would be useful to have in
Buildroot as well?

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com