On 1/3/23 00:47, Adam Ford wrote:
On Mon, Jan 2, 2023 at 5:41 PM Marek Vasut <ma...@denx.de> wrote:
On 1/2/23 17:44, Adam Ford wrote:
On Wed, Dec 21, 2022 at 9:58 PM Marek Vasut <ma...@denx.de> wrote:
On 12/22/22 04:05, Adam Ford wrote:
On Wed, Dec 21, 2022 at 6:47 PM Marek Vasut <ma...@denx.de> wrote:
Implement basic PSCI provider to let OS turn CPU cores off and on,
power off and restart the system and determine PSCI version. This
is sufficient to remove the need for the ATF BL31 blob altogether.
To make use of this functionality, active the following Kconfig options:
# CONFIG_PSCI_RESET is not set
CONFIG_ARMV8_MULTIENTRY=y
CONFIG_ARMV8_SET_SMPEN=y
CONFIG_ARMV8_SPL_EXCEPTION_VECTORS=y
CONFIG_ARMV8_EA_EL3_FIRST=y
CONFIG_ARMV8_PSCI=y
CONFIG_ARMV8_PSCI_CPUS_PER_CLUSTER=4
CONFIG_ARMV8_SECURE_BASE=0x970000
I am guessing 0x970000 was for the 8MP based on the previous location
of ATF. Is that true? If that's the case, can I assume that this
address would be 0x910000, 0x920000 and 0x960000 for the imx8mq,
imx8mm and imx8mn respectively?
It was for MX8MP, but you can pick whichever address you want, since it
is U-Boot that installs the SMC handlers, you are no longer forced to
somehow try and accommodate custom not well fitting load address picked
by some 3rd party binary blob.
I patched U-Boot's master with this series and I tried it on
imx8mn_beacon and imx8mm_beacon without success. I never even saw the
SPL message. I tried to focus on the Nano since the boot ROM in that
one is more similar to that of the 8mp, but the behaviour was similar
to that of the Nano. Are there any dependencies or should I have used
a specific starting branch?
Nope . But if you don't even see output from SPL, that's where I would
start looking. Do you see output from SPL without this series ? Note
that bulk of this series content applies to U-Boot proper, not SPL so far.
Without the patch series the generated flash.bin file booted both the
Mini and the Nano just fine. I have a pending 8m plus that I can also
try, since that is what you used. I just wanted to make sure I was
starting from the right place before I went too far with it.
Try and drop
[PATCH 09/10] arm: imx: imx8m: Program CSU and TZASC if PSCI provider
does SPL start then ?
I plan to try this on Nano at some point this month too.
