SDRAM Configuration

Here is the DTS format for the SDRAM configuration:

 /{
   sdram {
     mem_cfg_<N>: mem-cfg@<N> {
       <parameter> = <value>;
     };
   };
};

&mem_cfg_<N> {
  #include "\<mem_override_dts\>"
};

where

  • <N> is number starting from 0 representing different memory configurations

  • <parameter> is the SDRAM parameter. Usually, this corresponds to the MC/EMC register.

  • <value> is the 32-bit value of the corresponding register.

  • <mem_override_dts> is override file for SDRAM parameters which will be applied to all the configurations.

The format of the override dts will be:

<parameter> = <value>; // example McVideoProtectBom = <0x00000000>;

The Memory/MSS HW team will use a tool provided by SW to convert the legacy configuration format to the new DTS format.

Carveouts

The following types of hardware carveouts:

  • GSC carveouts

  • Non-GSC carveouts

The following table lists the important carveout fields in BCT cfg.

Field

Description

McGeneralizedCarveout<N>Bom GeneralizedCarveout<N>BomHi (where N is the GSC#)

Preferred base address of the GSC carveout. The recommended value is 0, and this field allows MB1 to allocate on its own.

McGeneralizedCarveout<N>Size128kb, where N is the GSC#.

Here are the values:
  • 31:27: Size of the generalized security carveout region with 4KB granularity.

  • 11:0: Size of the generalized security carveout region with 128KB granularity size = (MC_SECURITY_CARVEOUT1_SIZE_RAN←GE_128KB << 17) | (MC_SECURITY_CARVEOUT1_SIZE_RANGE_4KB << 12).

McGeneralizedCarveout<N>Access[0-5], where N is the GSC#.

Client Access Register for Generalized Carveout. For the bit description details refer to TRM.

McVideoProtectBom and McVideoProtectBomHi

Preferred base address of VPR carveout. The recommended value is 0, and this field allows MB1 to allocate on its own.

McVideoProtectSizeMb

Specifies VPR carveout size (in MB). Refer to enable_vpr_resize in Miscellaneous Configuration for more information.

GSC Carveouts

The following list gives a mapping between Carveout names and its corresponding GSC numbers:

Carveout #

Carveout Name

1

NVDEC

2

WPR1

3

WPR2

4

TSECA

5

TSECB

6

BPMP

7

APE

8

SPE

9

SCE

10

APR

11

TZRAM

12

IPC_SE_TSEC

13

BPMP_RCE

14

BPMP_DMCE

15

SE_SC7

16

BPMP_SPE

17

RCE

18

CPUTZ_BPMP

19

VM_ENCRYPT1

20

CPU_NS_BPMP

21

OEM_SC7

22

IPC_SE_SPE_SCE_BPMP

23

SC7_RF

24

CAMERA_TASK

25

SCE_BPMP

26

CV

27

VM_ENCRYPT2

28

HYPERVISOR

29

SMMU

30

PFSD

31

Unused

Non-GSC Carveouts

32

MTS

33

VPR