cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 247

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
5.4
The control registers for the ATA-5 compatible IDE control-
ler (ATAC) are divided into three sets:
• Standard GeodeLink Device MSRs
• ATAC Specific MSRs
• ATAC Native Registers
The MSRs are accessed via the RDMSR and WRMSR pro-
cessor instructions. The MSR address is derived from the
perspective of the CPU Core. See Section 3.2 "CS5535
MSR Address
MSR Address
51300011h-
5130001Fh
51300000h
51300001h
51300002h
51300003h
51300004h
51300005h
51300008h
51300009h
51300010h
51300020h
51300021h
51300022h
51300023h
51300024h
ATA-5 CONTROLLER REGISTER DESCRIPTIONS
Type
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
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Table 5-10. Standard GeodeLink Device MSRs Summary
Register Name
GeodeLink Device Capabilities MSR
(ATAC_GLD_MSR_CAP)
GeodeLink Device Master Configuration MSR
(ATAC_GLD_MSR_CONFIG)
GeodeLink Device SMI MSR
(ATAC_GLD_MSR_SMI)
GeodeLink Device Error MSR
(ATAC_GLD_MSR_ERROR)
GeodeLink Device Power Management MSR
(ATAC_GLD_MSR_PM)
GeodeLink Device Diagnostic MSR
(ATAC_GLD_MSR_DIAG)
Register Name
I/O Base Address (ATAC_IO_BAR)
Reset Decode (ATAC_RESET)
Unused
Channel 0 Drive 0 PIO (ATAC_CH0D0_PIO)
Channel 0 Drive 0 DMA (ATAC_CH0D0_DMA)
Channel 0 Drive 1 PIO (ATAC_CH0D1_PIO)
Channel 0 Drive 1 DMA (ATAC_CH0D1_DMA)
PCI Abort Error (ATAC_PCI_ABRTERR)
Unused
Table 5-11. ATAC Specific MSRs Summary
247
MSR Addressing" on page 53 for more details on MSR
addressing.
The Native registers are accessed as I/O Offsets from a
GLIU IOD Descriptor and are BYTE, WORD and DWORD
accessible.
Tables 5-10 through 5-12 are ATAC register summary
tables that include reset values and page references where
the bit descriptions are provided.
00000000_0000F000h
00000000_00000001h
00000000_00000000h
00000000_002470xxh
00000000_00000000h
00000000_00000100h
00000000_00000000h
00000000_00000000h
00000000_00009172h
00000000_00077771h
00000000_00009172h
00000000_00077771h
00000000_00000000h
Reset Value
Reset Value
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