SceSonyRegbus

Registers

Location

The SceSonyRegbus MMIO interface is located at physical address 0xE800'0000 (size 0x0100'0000).

Description

Default is to be understood as the value seen during observation.

Undocumented offsets are RAZ/WI but may still hold registers. Names in italic are guessed.

Offset	Name	Type	Description
0x0000	?	RW	Bits 0xF: Some kind of ACL (default value: 0x4)
0x0004	?	RW	Bits 0xF: Some kind of ACL (default value: 0x4)
0x0008	?	RW	Bits 0xF: Some kind of ACL (default value: 0x4)
0x000C	?	RW	Bits 0xF: Some kind of ACL (default value: 0x4)
0x0010	?	RW	Bits 0xF: Some kind of ACL (default value: 0xA) Writing 0xF can trigger DABT in gpu_es4.skprx
0x0014	?	RW	Bit 0: ? (writing 1 hangs ARM)
0x0100	?	RW	Bit 0: ? (maybe related to secure bus error?)
0x0108	REGBUS_SECERRSTAT	RO/WC?	Bit 0: secure bus error occurred on Regbus
0x0110	REGBUS_SECERRID	RO	Secure bus error identifier
0x0114	REGBUS_SECERRADDR	RO	Secure bus error address
0x0118	REGBUS_SECERRATTR	RO	Secure bus error attributes
0x011C	REGBUS_SECERRINFO	RO	Secure bus error info
0x0134	?	RO	? (seen values: 0xDC04, 0xB781, 0xEEDA)
0x0140	?	RO	4 words. Values similar to +0x134. Maybe some kind of error log.
0x0150	?	RW	Bits 0xFF: ? (default value: 0)
0x1100	?	RO	Bit 0: ? (maybe related to non-secure bus error?)
0x1108	REGBUS_ERRSTAT	RO/WC?	Bit 0: non-secure bus error occurred on Regbus
0x1110	REGBUS_ERRID	RO	Non-secure bus error identifier
0x1114	REGBUS_ERRADDR	RO	Non-secure bus error address
0x1118	REGBUS_ERRATTR	RO	Non-secure bus error attributes
0x111C	REGBUS_ERRINFO	RO	Non-secure bus error info
0x1120	?	RO	Polled by SMC 0x11F. Seen values: 0x2
0x1124	?	RW	Bits 0x3: ? (default value: 0)
0x1128	?	RW	?
0x2000	Accesses at offset 0x2000 or higher trigger an Address Space Hole bus error