Re: [PATCH] hw/riscv: microchip_pfsoc: IOSCBCTRL memmap entry

[Bin Meng]

Hi Ivan,

On Sat, Oct 17, 2020 at 12:31 AM Ivan Griffin <ivan.griffin@emdalo.com> wrote:
>
> I don't know why it isn't documented in that PDF (or in the register map), 
> but if you check 
> https://github.com/polarfire-soc/polarfire-soc-bare-metal-library/blob/master/src/platform/drivers/mss_sys_services/mss_sys_services.h
>  you'll see the following
>
> ```
> typedef struct
> {
>     volatile uint32_t SOFT_RESET;
>     volatile uint32_t VDETECTOR;
>     volatile uint32_t TVS_CONTROL;
>     volatile uint32_t TVS_TEMP_A;
>     volatile uint32_t TVS_TEMP_B;
>     volatile uint32_t TVS_TEMP_C;
>     volatile uint32_t TVS_VOLT_A;
>     volatile uint32_t TVS_VOLT_B;
>     volatile uint32_t TVS_VOLT_C;
>     volatile uint32_t TVS_OUTPUT0;
>     volatile uint32_t TVS_OUTPUT1;
>     volatile uint32_t TVS_TRIGGER;
>     volatile uint32_t TRIM_VDET1P05;
>     volatile uint32_t TRIM_VDET1P8;
>     volatile uint32_t TRIM_VDET2P5;
>     volatile uint32_t TRIM_TVS;
>     volatile uint32_t TRIM_GDET1P05;
>     volatile uint32_t RESERVED0;
>     volatile uint32_t RESERVED1;
>     volatile uint32_t RESERVED2;
>     volatile uint32_t SERVICES_CR;
>     volatile uint32_t SERVICES_SR;
>     volatile uint32_t USER_DETECTOR_SR;
>     volatile uint32_t USER_DETECTOR_CR;
>     volatile uint32_t MSS_SPI_CR;
>
> } SCBCTRL_TypeDef;
>
> #define MSS_SCBCTRL                    ((SCBCTRL_TypeDef*) (0x37020000UL))
>
> /*2kB bytes long mailbox.*/
> #define MSS_SCBMAILBOX                 ((uint32_t*) (0x37020800UL))
> ```
>
> And in 
> https://github.com/polarfire-soc/polarfire-soc-bare-metal-library/blob/master/src/platform/drivers/mss_sys_services/mss_sys_services.c
>  you'll see MSS_SCB and MSS_SCBMAILBOX used in many places to interact with 
> the FPGA system controller to perform various services.

It's actually documented, but not in the PDF file. I also spent some
time locating the doc when I do the DDR controller modeling work.

See Register Map/PF_SoC_RegMap_V1_1/MPFS250T/pfsoc_control_scb.htm in
https://www.microsemi.com/document-portal/doc_download/1244581-polarfire-soc-register-map

Regards,
Bin