Hardware/Memory Controller

These registers contain various settings relevant to configuring system memory (and perhaps some aspects of the AHB). boot1 seems responsible for initially configuring a lot of these registers during the boot process - most likely for setting the DDR memory timings. In general, IOS (including BC/MIOS) seem to interact with these early when booting. The IOS[58] kernel also exposes syscall 0x57 for writing to this register space, which only appears to be used by the STM module.

Memory Controller
Access
Broadway	???
Starlet	Full
Registers
Base	0x0d8b4200
Length	0xcc (?)
Access size	16 bits
Byte order	Big Endian

Some of these register banks (SEQ/BIST/PERF) are not directly mapped into memory, but are instead accessed using a corresponding pair of registers:

• For the DDR SEQ registers, MEM_SEQ_ADDR and MEM_SEQ_DATA
• For the DDR BIST, MEM_BIST_ADDR and MEM_BIST_DATA
• For the DPERF registers, presumably MEM_PERF and MEM_PERF_READ are involved ^[check]
• MEM_ARB_EXADDR and MEM_ARB_EXCMD are used during DRAM initialization for Mode Register Set programming (the layout is probably vendor-specific).

Although the memory controller registers are actually mapped and available to ARM starting at 0x0d8b4200, some [all?] of the indirect accesses are performed starting with another pair in the Memory Interface registers.

Memory Controller Base Registers
Address	Bits	Name	Description
0x0d8b4200	16	MEM_COMPAT
0x0d8b4202	16	MEM_PROT_REG
0x0d8b4204	16	MEM_PROT_SPL	SPL (?) protection enabled/disable
0x0d8b4206	16	MEM_PROT_SPL_BASE	SPL (?) protection base address
0x0d8b4208	16	MEM_PROT_SPL_END	SPL (?) protection end address
0x0d8b420a	16	MEM_PROT_DDR	DDR protection enable/disable
0x0d8b420c	16	MEM_PROT_DDR_BASE	DDR protection base address
0x0d8b420e	16	MEM_PROT_DDR_END	DDR protection end address
0x0d8b4210	16	MEM_COLSEL
0x0d8b4212	16	MEM_ROWSEL
0x0d8b4214	16	MEM_BANKSEL
0x0d8b4216	16	MEM_RANKSEL
0x0d8b4218	16	MEM_COLMSK
0x0d8b421a	16	MEM_ROWMSK
0x0d8b421c	16	MEM_BANKMSK
0x0d8b421e	16	MEM_PROT_SPL_ERR
0x0d8b4220	16	MEM_PROT_DDR_ERR
0x0d8b4222	16	MEM_PROT_SPL_MSK
0x0d8b4224	16	MEM_PROT_DDR_MSK
0x0d8b4226	16	MEM_RFSH
0x0d8b4228	16	MEM_AHMFLUSH	AHB flush request
0x0d8b422a	16	MEM_AHMFLUSH_ACK	AHB flush request acknowledgment
0x0d8b4268	16	MEM_SEQRD_HWM
0x0d8b426a	16	MEM_SEQWR_HWM
0x0d8b426c	16	MEM_SEQCMD_HWM
0x0d8b426e	16	MEM_CPUAHM_WR_T
0x0d8b4270	16	MEM_DMAAHM_WR_T
0x0d8b4272	16	MEM_DMAAHM0_WR_T
0x0d8b4274	16	MEM_DMAAHM1_WR_T
0x0d8b4276	16	MEM_PI_WR_T
0x0d8b4278	16	MEM_PE_WR_T
0x0d8b427a	16	MEM_IO_WR_T
0x0d8b427c	16	MEM_DSP_WR_T
0x0d8b427e	16	MEM_ACC_WR_T
0x0d8b4280	16	MEM_ARB_MAXWR
0x0d8b4282	16	MEM_ARB_MINRD
0x0d8b4284	16	MEM_PROF_CPUAHM
0x0d8b4286	16	MEM_PROF_CPUAHM0
0x0d8b4288	16	MEM_PROF_DMAAHM
0x0d8b428a	16	MEM_PROF_DMAAHM0
0x0d8b428c	16	MEM_PROF_DMAAHM1
0x0d8b428e	16	MEM_PROF_PI
0x0d8b4290	16	MEM_PROF_VI
0x0d8b4292	16	MEM_PROF_IO
0x0d8b4294	16	MEM_PROF_DSP
0x0d8b4296	16	MEM_PROF_TC
0x0d8b4298	16	MEM_PROF_CP
0x0d8b429a	16	MEM_PROF_ACC
0x0d8b429c	16	MEM_RDPR_CPUAHM
0x0d8b429e	16	MEM_RDPR_CPUAHM0
0x0d8b42a0	16	MEM_RDPR_DMAAHM
0x0d8b42a2	16	MEM_RDPR_DMAAHM0
0x0d8b42a4	16	MEM_RDPR_DMAAHM1
0x0d8b42a6	16	MEM_RDPR_PI
0x0d8b42a8	16	MEM_RDPR_VI
0x0d8b42aa	16	MEM_RDPR_IO
0x0d8b42ac	16	MEM_RDPR_DSP
0x0d8b42ae	16	MEM_RDPR_TC
0x0d8b42b0	16	MEM_RDPR_CP
0x0d8b42b2	16	MEM_RDPR_ACC
0x0d8b42b4	16	MEM_ARB_MAXRD
0x0d8b42b6	16	MEM_ARB_MISC
0x0d8b42b8	16	MEM_ARAM_EMUL	"ARAM Emulation" (?)
0x0d8b42ba	16	MEM_WRMUX
0x0d8b42bc	16	MEM_PERF
0x0d8b42be	16	MEM_PERF_READ
0x0d8b42c0	16	MEM_ARB_EXADDR
0x0d8b42c2	16	MEM_ARB_EXCMD
0x0d8b42c4	16	MEM_SEQ_DATA	Data from read (or for pending write) on DDR SEQ
0x0d8b42c6	16	MEM_SEQ_ADDR	Offset for access on DDR SEQ register space
0x0d8b42c8	16	MEM_BIST_DATA	Data from read (or for pending write) on DDR BIST
0x0d8b42ca	16	MEM_BIST_ADDR	Offset for access on DDR BIST register space

DDR SEQ Register Space

SEQ
Access
Broadway	???
Starlet	Full
Registers
Base	N/A
Length	???
Access size	16 bits
Byte order	Big Endian

Note: These registers are NOT mapped into memory.

DDR SEQ Registers
Address	Bits	Name	Description
0x00000000	16	DDR_SEQ_BL4
0x00000001	16	DDR_SEQ_TRCDR
0x00000002	16	DDR_SEQ_TRCDW
0x00000003	16	DDR_SEQ_TRAS
0x00000004	16	DDR_SEQ_TRC
0x00000005	16	DDR_SEQ_TCL
0x00000006	16	DDR_SEQ_TWL
0x00000007	16	DDR_SEQ_RRL
0x00000008	16	DDR_SEQ_TRRD
0x00000009	16	DDR_SEQ_TFAW
0x0000000a	16	DDR_SEQ_TRFC
0x0000000b	16	DDR_SEQ_TRDWR
0x0000000c	16	DDR_SEQ_TWRRD
0x0000000d	16	DDR_SEQ_TR2R
0x0000000e	16	DDR_SEQ_RDPR
0x0000000f	16	DDR_SEQ_WRPR
0x00000010	16	DDR_SEQ_BANK4
0x00000011	16	DDR_SEQ_QSOE0
0x00000012	16	DDR_SEQ_QSOE1
0x00000013	16	DDR_SEQ_QSOE2
0x00000014	16	DDR_SEQ_QSOE3
0x00000015	16	DDR_SEQ_RANK2
0x00000016	16	DDR_SEQ_DDR2
0x00000017	16	DDR_SEQ_RSTB
0x00000018	16	DDR_SEQ_CKEEN
0x00000019	16	DDR_SEQ_CKEDYN
0x0000001a	16	DDR_SEQ_CKESR
0x0000001b	16	DDR_SEQ_ODTON
0x0000001c	16	DDR_SEQ_ODTDYN
0x0000001d	16	DDR_SEQ_ODT0
0x0000001e	16	DDR_SEQ_ODT1
0x0000001f	16	DDR_SEQ_RECEN0
0x00000020	16	DDR_SEQ_RECEN1
0x00000021	16	DDR_SEQ_IDLEST
0x00000022	16	DDR_SEQ_NPLRD
0x00000023	16	DDR_SEQ_NPLCONF
0x00000024	16	DDR_SEQ_NOOPEN
0x00000025	16	DDR_SEQ_QSDEF
0x00000026	16	DDR_SEQ_ODTPIN
0x00000027	16	DDR_SEQ_NPLDLY
0x00000028	16	DDR_SEQ_STATUS
0x00000029	16	DDR_SEQ_VENDORID0
0x0000002a	16	DDR_SEQ_VENDORID1
0x0000002b	16	DDR_SEQ_NMOSPD
0x0000002c	16	DDR_SEQ_STR0
0x0000002d	16	DDR_SEQ_STR1
0x0000002e	16	DDR_SEQ_STR2
0x0000002f	16	DDR_SEQ_STR3
0x00000030	16	DDR_SEQ_APAD0
0x00000031	16	DDR_SEQ_APAD1
0x00000032	16	DDR_SEQ_CKPAD0
0x00000033	16	DDR_SEQ_CKPAD1
0x00000034	16	DDR_SEQ_CMDPAD0
0x00000035	16	DDR_SEQ_CMDPAD1
0x00000036	16	DDR_SEQ_DQPAD0
0x00000037	16	DDR_SEQ_DQPAD1
0x00000038	16	DDR_SEQ_QSPAD0
0x00000039	16	DDR_SEQ_QSPAD1
0x0000003a	16	DDR_SEQ_WRDQ0
0x0000003b	16	DDR_SEQ_WRDQ1
0x0000003c	16	DDR_SEQ_WRQS0
0x0000003d	16	DDR_SEQ_WRQS1
0x0000003e	16	DDR_SEQ_MADJL
0x0000003f	16	DDR_SEQ_MADJH
0x00000040	16	DDR_SEQ_SADJ0L
0x00000041	16	DDR_SEQ_SADJ0H
0x00000042	16	DDR_SEQ_SADJ1L
0x00000043	16	DDR_SEQ_SADJ1H
0x00000044	16	DDR_SEQ_RDDQ1
0x00000045	16	DDR_SEQ_WR
0x00000046	16	DDR_SEQ_PADA
0x00000047	16	DDR_SEQ_PAD0
0x00000048	16	DDR_SEQ_PAD1
0x00000049	16	DDR_SEQ_ARAM
0x0000004a	16	DDR_SEQ_WR2PR
0x0000004b	16	DDR_SEQ_SYNC
0x0000004c	16	DDR_SEQ_RECVON

DDR BIST Register Space

BIST
Access
Broadway	???
Starlet	Full
Registers
Base	N/A
Length	???
Access size	16 bits
Byte order	Big Endian

Note: These registers are NOT mapped into memory.

DDR BIST Registers
Address	Bits	Name	Description
0x00000000	16	BIST_EN
0x00000001	16	BIST_WRGO
0x00000002	16	BIST_WRRPT
0x00000003	16	BIST_WRCNTH
0x00000004	16	BIST_WRCNTL
0x00000005	16	BIST_RDGO
0x00000006	16	BIST_RDRPT
0x00000007	16	BIST_RDCNTH
0x00000008	16	BIST_RDCNTL
0x00000009	16	BIST_WA_CH
0x0000000a	16	BIST_WA_CL
0x0000000b	16	BIST_WA_SCNTH
0x0000000c	16	BIST_WA_SCNTL
0x0000000d	16	BIST_WA_SCONH
0x0000000e	16	BIST_WA_SCONL
0x0000000f	16	BIST_RA_CH
0x00000010	16	BIST_RA_CL
0x00000011	16	BIST_RA_SCNTH
0x00000012	16	BIST_RA_SCNTL
0x00000013	16	BIST_RA_SCONH
0x00000014	16	BIST_RA_SCONL
0x00000015	16	BIST_WD_C0H
0x00000016	16	BIST_WD_C0L
0x00000017	16	BIST_WD_C1H
0x00000018	16	BIST_WD_C1L
0x00000019	16	BIST_WD_C2H
0x0000001a	16	BIST_WD_C2L
0x0000001b	16	BIST_WD_C3H
0x0000001c	16	BIST_WD_C3L
0x0000001d	16	BIST_WD_C4H
0x0000001e	16	BIST_WD_C4L
0x0000001f	16	BIST_WD_C5H
0x00000020	16	BIST_WD_C5L
0x00000021	16	BIST_WD_C6H
0x00000022	16	BIST_WD_C6L
0x00000023	16	BIST_WD_C7H
0x00000024	16	BIST_WD_C7L
0x00000025	16	BIST_WD_SCNTH
0x00000026	16	BIST_WD_SCNTL
0x00000027	16	BIST_WD_SCONH
0x00000028	16	BIST_WD_SCONL
0x00000029	16	BIST_RD_C0H
0x0000002a	16	BIST_RD_C0L
0x0000002b	16	BIST_RD_C1H
0x0000002c	16	BIST_RD_C1L
0x0000002d	16	BIST_RD_C2H
0x0000002e	16	BIST_RD_C2L
0x0000002f	16	BIST_RD_C3H
0x00000030	16	BIST_RD_C3L
0x00000031	16	BIST_RD_C4H
0x00000032	16	BIST_RD_C4L
0x00000033	16	BIST_RD_C5H
0x00000034	16	BIST_RD_C5L
0x00000035	16	BIST_RD_C6H
0x00000036	16	BIST_RD_C6L
0x00000037	16	BIST_RD_C7H
0x00000038	16	BIST_RD_C7L
0x00000039	16	BIST_RD_SCNTH
0x0000003a	16	BIST_RD_SCNTL
0x0000003b	16	BIST_RD_SCONH
0x0000003c	16	BIST_RD_SCONL
0x0000003d	16	BIST_RD_MSKH
0x0000003e	16	BIST_RD_MSKL
0x0000003f	16	BIST_WRIDLE
0x00000040	16	BIST_RDIDLE
0x00000041	16	BIST_ERRCNT

DDR PERF Register Space

PERF
Access
Broadway	???
Starlet	Full
Registers
Base	N/A
Length	???
Access size	16 bits
Byte order	Big Endian

Note: These registers are NOT mapped into memory.

DDR PERF Registers
Address	Bits	Name	Description
0x00000000	16	DPERF_TIME
0x00000002	16	DPERF_SEQCMD
0x00000004	16	DPERF_SEQDATA
0x00000006	16	DPERF_RF_CNT_PI
0x00000008	16	DPERF_NREQ_DDR_PI
0x0000000a	16	DPERF_TREQ_DDR_PI
0x0000000c	16	DPERF_TACK_DDR_PI
0x0000000e	16	DPERF_NREQ_SPL_PI
0x00000010	16	DPERF_TREQ_SPL_PI
0x00000012	16	DPERF_TACK_SPL_PI
0x00000014	16	DPERF_RF_CNT_CPUAHM
0x00000016	16	DPERF_NREQ_DDR_CPUAHM
0x00000018	16	DPERF_TREQ_DDR_CPUAHM
0x0000001a	16	DPERF_TACK_DDR_CPUAHM
0x0000001c	16	DPERF_NREQ_SPL_CPUAHM
0x0000001e	16	DPERF_TREQ_SPL_CPUAHM
0x00000020	16	DPERF_TACK_SPL_CPUAHM
0x00000022	16	DPERF_RF_CNT_DMAAHM
0x00000024	16	DPERF_NREQ_DDR_DMAAHM
0x00000026	16	DPERF_TREQ_DDR_DMAAHM
0x00000028	16	DPERF_TACK_DDR_DMAAHM
0x0000002a	16	DPERF_NREQ_SPL_DMAAHM
0x0000002c	16	DPERF_TREQ_SPL_DMAAHM
0x0000002e	16	DPERF_TACK_SPL_DMAAHM
0x00000030	16	DPERF_RF_CNT_VI
0x00000032	16	DPERF_NREQ_DDR_VI
0x00000034	16	DPERF_TREQ_DDR_VI
0x00000036	16	DPERF_TACK_DDR_VI
0x00000038	16	DPERF_NREQ_SPL_VI
0x0000003a	16	DPERF_TREQ_SPL_VI
0x0000003c	16	DPERF_TACK_SPL_VI
0x0000003e	16	DPERF_RF_CNT_IO
0x00000040	16	DPERF_NREQ_DDR_IO
0x00000042	16	DPERF_TREQ_DDR_IO
0x00000044	16	DPERF_TACK_DDR_IO
0x00000046	16	DPERF_NREQ_SPL_IO
0x00000048	16	DPERF_TREQ_SPL_IO
0x0000004a	16	DPERF_TACK_SPL_IO
0x0000004c	16	DPERF_RF_CNT_DSP
0x0000004e	16	DPERF_NREQ_DDR_DSP
0x00000050	16	DPERF_TREQ_DDR_DSP
0x00000052	16	DPERF_TACK_DDR_DSP
0x00000054	16	DPERF_NREQ_SPL_DSP
0x00000056	16	DPERF_TREQ_SPL_DSP
0x00000058	16	DPERF_TACK_SPL_DSP
0x0000005a	16	DPERF_RF_CNT_TC
0x0000005c	16	DPERF_NREQ_DDR_TC
0x0000005e	16	DPERF_TREQ_DDR_TC
0x00000060	16	DPERF_TACK_DDR_TC
0x00000062	16	DPERF_NREQ_SPL_TC
0x00000064	16	DPERF_TREQ_SPL_TC
0x00000066	16	DPERF_TACK_SPL_TC
0x00000068	16	DPERF_RF_CNT_CP
0x0000006a	16	DPERF_NREQ_DDR_CP
0x0000006c	16	DPERF_TREQ_DDR_CP
0x0000006e	16	DPERF_TACK_DDR_CP
0x00000070	16	DPERF_NREQ_SPL_CP
0x00000072	16	DPERF_TREQ_SPL_CP
0x00000074	16	DPERF_TACK_SPL_CP
0x00000076	16	DPERF_RF_CNT_ACC
0x00000078	16	DPERF_NREQ_DDR_ACC
0x0000007a	16	DPERF_TREQ_DDR_ACC
0x0000007c	16	DPERF_TACK_DDR_ACC
0x0000007e	16	DPERF_NREQ_SPL_ACC
0x00000080	16	DPERF_TREQ_SPL_ACC
0x00000082	16	DPERF_TACK_SPL_ACC