[PATCH 7/8] board: sl28: add ATF support (bl31)

[Michael Walle <michael@walle.cc>]

Am 2020-11-18 15:15, schrieb Michal Simek:
> On 18. 11. 20 15:10, Michael Walle wrote:
>> Am 2020-11-18 15:06, schrieb Michal Simek:
>>> On 16. 11. 20 22:47, Michael Walle wrote:
>>>> Add support to load the bl31 part of the ARM Trusted Firmware by the
>>>> SPL.
>>>> 
>>>> Signed-off-by: Michael Walle <michael@walle.cc>
>>>> ---
>>>> ?.../dts/fsl-ls1028a-kontron-sl28-u-boot.dtsi? | 41 +++++++++++++-
>>>> ?board/kontron/sl28/Kconfig??????????????????? | 10 ++++
>>>> ?board/kontron/sl28/Makefile?????????????????? |? 6 ++-
>>>> ?board/kontron/sl28/spl_atf.c????????????????? | 54 
>>>> +++++++++++++++++++
>>>> ?4 files changed, 109 insertions(+), 2 deletions(-)
>>>> ?create mode 100644 board/kontron/sl28/spl_atf.c
>>>> 
>>>> diff --git a/arch/arm/dts/fsl-ls1028a-kontron-sl28-u-boot.dtsi
>>>> b/arch/arm/dts/fsl-ls1028a-kontron-sl28-u-boot.dtsi
>>>> index 2375549c6e..4b97e9d388 100644
>>>> --- a/arch/arm/dts/fsl-ls1028a-kontron-sl28-u-boot.dtsi
>>>> +++ b/arch/arm/dts/fsl-ls1028a-kontron-sl28-u-boot.dtsi
>>>> @@ -16,7 +16,7 @@
>>>> ???????? ethernet3 = &enetc6;
>>>> ???? };
>>>> 
>>>> -??? binman {
>>>> +??? binman: binman {
>>>> ???????? filename = "u-boot.rom";
>>>> ???????? pad-byte = <0xff>;
>>>> 
>>>> @@ -102,6 +102,45 @@
>>>> ???? };
>>>> ?};
>>>> 
>>>> +#ifdef CONFIG_SL28_SPL_LOADS_ATF_BL31
>>>> +&binman {
>>>> +??? fit {
>>>> +??????? images {
>>>> +??????????? bl31 {
>>>> +??????????????? description = "ARM Trusted Firmware (bl31)";
>>>> +??????????????? type = "firmware";
>>>> +??????????????? arch = "arm";
>>>> +??????????????? os = "arm-trusted-firmware";
>>>> +??????????????? compression = "none";
>>>> +??????????????? load = <CONFIG_SL28_BL31_ENTRY_ADDR>;
>>>> +??????????????? entry = <CONFIG_SL28_BL31_ENTRY_ADDR>;
>>>> +
>>>> +??????????????? blob-ext {
>>>> +??????????????????? filename = "bl31.bin";
>>>> +??????????????? };
>>>> +??????????? };
>>>> +??????? };
>>>> +
>>>> +??????? configurations {
>>>> +??????????? conf-1 {
>>>> +??????????????? firmware = "bl31";
>>>> +??????????????? loadables = "uboot", "bl31";
>>>> +??????????? };
>>>> +
>>>> +??????????? conf-2 {
>>>> +??????????????? firmware = "bl31";
>>>> +??????????????? loadables = "uboot", "bl31";
>>>> +??????????? };
>>>> +
>>>> +??????????? conf-3 {
>>>> +??????????????? firmware = "bl31";
>>>> +??????????????? loadables = "uboot", "bl31";
>>>> +??????????? };
>>> 
>>> Why do you need 3 the same configurations here?
>> 
>> Because they differ in the fdt, but I still need to change the 
>> loadable
>> property if BL31/BL32 is enabled. See:
>> 
>> https://elixir.bootlin.com/u-boot/v2021.01-rc2/source/arch/arm/dts/fsl-ls1028a-kontron-sl28-u-boot.dtsi#L77
> 
> ah. ok. It is another overlay. But still you have firmware bl31 and
> loadables bl31 too. It means you are loading bl31 twice.

Just for completeness (in spl_load_simple_fit()):
/*
  * if the firmware is also a loadable, skip it because
  * it already has been loaded. This is typically the case with
  * u-boot.img generated by mkimage.
  */

No harm here; but I'll remove it anyway.

-michael