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