14.12.4 Region Control

Note: This register does not apply for H2PB0/1/2 Main regions, that is IDAU EXEMPT_B regions with indices 10, 11, 12. The Secure/Non-Secure configuration for the peripherals (H2PB bridges included) is done through the BOOTCFG H2PB fuses and applied by the Rom code. This register is part of a register group (composed of RCTRL, RSTATUS[A,B,C]) that is repeated IDAU_REGION_NUM times. Register group x controls and returns status of the IDAU region x.

Table 14-11. Register Bit Attribute Legend
Symbol	Description	Symbol	Description	Symbol	Description
R	Readable bit	HC	Cleared by Hardware	(Grey cell)	Unimplemented
W	Writable bit	HS	Set by Hardware	X	Bit is unknown at Reset
K	Write to clear	S	Software settable bit	—	—

Name:	RCTRL
Offset:	0x1000
Reset:	0x00000000
Property:	W


Bit	31	30	29	28	27	26	25	24
	CMD[7:0]
Access	W	W	W	W	W	W	W	W
Reset	0	0	0	0	0	0	0	0


Bit	23	22	21	20	19	18	17	16
	ARG[23:16]
Access	W	W	W	W	W	W	W	W
Reset	0	0	0	0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
	ARG[15:8]
Access	W	W	W	W	W	W	W	W
Reset	0	0	0	0	0	0	0	0


Bit	7	6	5	4	3	2	1	0
	ARG[7:0]
Access	W	W	W	W	W	W	W	W
Reset	0	0	0	0	0	0	0	0

Bits 31:24 – CMD[7:0] Command

User must write this value only: 0x5C= IDAU region x Size (RSTATUSB[x].SIZE=ARG) (WRSZ). This command will apply to IDAU region types suffixed _W. Illegal commands are reported to STATUSB.CFGERR.

Bits 23:0 – ARG[23:0] Command Argument

Argument defines the watermark in the associated main region that splits it in 2 distinct IDAU regions.

This watermark is an offset in Bytes from the top address of the MAIN region equal to ARG.2^RSTATUSA[x].GRAN Bytes. ARG must be strictly lower than 2^(RSTATUSA[x].MAXSZ). The size of the IDAU region is ARG times the size of a single block of 2^RSTATUSA[x].GRAN Bytes (note: block term used here as a generic term and does not refer to block type).