Hardware/Hollywood Registers

Hollywood Registers
Access
Broadway	Partial
Starlet	Full
Registers
Base	0x0d800000
Length	0x400
Access size	32 bits
Byte order	Big Endian
IRQs
Broadway	14
Hollywood	0,10,11,17,30,31,...[check]

The Hollywood chipset includes a large register area including many miscellaneous controls. Some of these registers can be accessed by the powerPC. Address bit 23 (0x00800000) controls the permission: if it is set, then the registers are accessed with Starlet permission (full access). If it is clear, only the PPC subset of the registers is visible. From the PPC, the state of this bit is irrelevant, which suggests that it is forced to zero internally in one of the buses.

Register list

Hollywood Registers
Address	Bits	Name	Description
0x0d800000	32	HW_IPC_PPCMSG	IPC
0x0d800004	32	HW_IPC_PPCCTRL
0x0d800008	32	HW_IPC_ARMMSG
0x0d80000c	32	HW_IPC_ARMCTRL
0x0d800010	32	HW_TIMER	Starlet Timer
0x0d800014	32	HW_ALARM
0x0d800038	32	HW_PPCIRQFLAG	Hollywood IRQ controller
0x0d80003c	32	HW_PPCIRQMASK
0x0d800038	32	HW_ARMIRQFLAG
0x0d80003c	32	HW_ARMIRQMASK
0x0d800038	32	HW_MEMIRR	Memory control / SRAM bank swap[check]
0x0d800070	32	HW_EXICTRL	EXI PPC enable / control / other [check]
0x0d8000c0	32	HW_GPIOB_OUT	Hollywood GPIOs
0x0d8000c4	32	HW_GPIOB_DIR
0x0d8000c8	32	HW_GPIOB_IN
0x0d8000cc	32	HW_GPIOB_INTLVL
0x0d8000d0	32	HW_GPIOB_INTFLAG
0x0d8000d4	32	HW_GPIOB_INTMASK
0x0d8000d8	32	HW_GPIOB_INMIR
0x0d8000dc	32	HW_GPIO_ENABLE
0x0d8000e0	32	HW_GPIO_OUT
0x0d8000e4	32	HW_GPIO_DIR
0x0d8000e8	32	HW_GPIO_IN
0x0d8000ec	32	HW_GPIO_INTLVL
0x0d8000f0	32	HW_GPIO_INTFLAG
0x0d8000f4	32	HW_GPIO_INTMASK
0x0d8000f8	32	HW_GPIO_INMIR
0x0d8000fc	32	HW_GPIO_OWNER
0x0d800180	32	HW_DIFLAGS	Some DI stuff and boot code and [check]
0x0d80018c	32	HW_BOOT0	Maps boot0 [check]
0x0d800194	32	HW_RESETS	System resets / power[check]
0x0d8001b4	32	HW_CLOCKS[check]	Clocking[check]
0x0d8001ec	32	HW_OTPCMD	OTP
0x0d8001d0	32	HW_OTPDATA
0x0d800214	32	HW_VERSION	Hollywood version

General Registers

HW_VERSION (0x0d800214)
	31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
Access	U
Field
	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Access	U								R				R
Field									VERHI				VERLO

This register contains the hardware revision of the Hollywood chipset.

Field	Description
VERHI	Version
VERLO	Revision

HW_EXICTRL (0x0d800070)
	31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
Access	?
Field
	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Access	?															R/W
Field																EXI

This register controls at least the current EXI status.

Field	Description
EXI	enable EXI bus

HW_DIFLAGS (0x0d800180)
	31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
Access	?											R/W	?
Field												PPCBOOT
	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Access	?
Field

This register seems to control some aspects of the powerpc booting and some di flags.^[check]

Field	Description
PPCBOOT	needs to be set to allow the powerpc to read the boot stub.

HW_BOOT0 (0x0d80018c)
	31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
Access	?
Field
	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Access	?			R/W	?
Field				BOOT0

This register at least control the boot0 memory mapping.

Field	Description
BOOT0	Disable boot0 mapping to either x'fffe_0000 or x'ffff_0000 depending on HW_MEMMIRR

HW_RESETS (0x0d800194)
	31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
Access	U					R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Field						A	B	HANG	D	E	F	G	H	I	DI2	K
	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Field	L	M	N	O	P	DI	R	S	T	U	PPC1	PPC2	V	SYS3	SYS2	SYS

This register seems to contain the RESET control bits for several parts of the system, and possibly power-on stuff too. Reset/off = 0, run/on = 1.

Field	Description
HANG	System reset without recovery? Kills DI, sets slot LED on, hangs starlet...
H	If cleared, kills EXI-based starlet experimental proxy.
DI2	DI reset 2?
K	If cleared, kills EXI-based starlet experimental proxy.
P	If cleared, kills EXI-based starlet experimental proxy.
DI	DI reset
U	If cleared, kills EXI-based starlet experimental proxy.
PPC1	PowerPC Reset 1 (release first)
PPC2	PowerPC Reset 2 (release second)
SYS3	System reset 3. Also seems to reboot system.
SYS2	System reset 2. Also seems to reboot system.
SYS	System reset. Set to zero to reboot system.