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Instead provide respective RPU >>>>> start and stop API in the firmware driver and move the logic to interact >>>>> with the PM firmware in the firmware driver. The remoteproc driver >>>>> doesn't >>>>> need to know actual logic, but only the final result i.e. RPU start/stop >>>>> was success or not. This refactor keeps the remoteproc driver simple and >>>>> moves firmware interaction logic to the firmware driver. >>>>> >>>>> Signed-off-by: Tanmay Shah >>>>> --- >>>>> drivers/firmware/xilinx/zynqmp.c | 93 +++++++++++++++++++++++++ >>>>> drivers/remoteproc/xlnx_r5_remoteproc.c | 68 ++---------------- >>>>> include/linux/firmware/xlnx-zynqmp.h | 12 ++++ >>>>> 3 files changed, 110 insertions(+), 63 deletions(-) >>>>> >>>>> diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/ >>>>> xilinx/zynqmp.c >>>>> index af838b2dc327..f9a3a95b0638 100644 >>>>> --- a/drivers/firmware/xilinx/zynqmp.c >>>>> +++ b/drivers/firmware/xilinx/zynqmp.c >>>>> @@ -1513,6 +1513,99 @@ int zynqmp_pm_request_wake(const u32 node, >>>>> } >>>>> EXPORT_SYMBOL_GPL(zynqmp_pm_request_wake); >>>>> +/** >>>>> + * zynqmp_pm_start_rpu - Boot Real-time Processing Unit (Cortex-R) on >>>>> SoC >>>>> + * >>>>> + * @node: power-domains id of the core >>>>> + * @bootaddr: Boot address of elf >>>>> + * >>>>> + * Return: status, either success or error+reason >>>>> + */ >>>>> +int zynqmp_pm_start_rpu(const u32 node, const u64 bootaddr) >>>>> +{ >>>>> + enum rpu_boot_mem bootmem; >>>>> + int ret; >>>>> + >>>>> + /* >>>>> + * The exception vector pointers (EVP) refer to the base-address of >>>>> + * exception vectors (for reset, IRQ, FIQ, etc). The reset-vector >>>>> + * starts at the base-address and subsequent vectors are on 4-byte >>>>> + * boundaries. >>>>> + * >>>>> + * Exception vectors can start either from 0x0000_0000 (LOVEC) or >>>>> + * from 0xFFFF_0000 (HIVEC) which is mapped in the OCM (On-Chip >>>>> Memory) >>>> >>>> here >>>> >>>>> + * >>>>> + * Usually firmware will put Exception vectors at LOVEC. >>>>> + * >>>>> + * It is not recommend that you change the exception vector. >>>>> + * Changing the EVP to HIVEC will result in increased interrupt >>>>> latency >>>>> + * and jitter. Also, if the OCM is secured and the Cortex-R5F >>>>> processor >>>>> + * is non-secured, then the Cortex-R5F processor cannot access the >>>>> + * HIVEC exception vectors in the OCM. >>>>> + */ >>>>> + bootmem = (bootaddr >= 0xFFFC0000) ? >>>> >>>> and here you have different values without any explanation why. >>>> >>> >>> The value in the comment is correct, but the check is done for all of >>> OCM address range. This is just refactoring of the interfaces and not >>> the actual logic. There is a separate patch which actually refactors the >>> logic, I will send it later. I would like to keep this as it is because >>> this was originally there, and the intent of the commit is not to modify it. >> >> ok. >> >> Acked-by: Michal Simek >> > > Michal - do you prefer that I pick this patch on the remoteproc side? yes please. Thanks, Michal