Memory Map | 32430C |
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Memory7Map
Figures 7-1, 7-2, and 7-3 show the system memory. Figure 7-1 is the GLIU Descriptor Map, Figure 7-2 shows the Core Cache descriptors, and Figure 7-3 on page 32 shows the Core cache region configurations.
Figure 7-4 on page 33 shows the flow of GeodeROM in the GX processor/CS5535 system.
Memory Descriptors
BM - Base Mask | BMO - Base Mask Offset |
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R - Range | RO - Range Offset |
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SC - Swiss Cheese | No Swiss Cheese Offset |
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Figure 7-1. GLIU Descriptor Map
FFFFFFFFh (4 GB)
Frame Buffer Offset
Video Descriptors
(RO, VP + GP + DC)
VSA Offset
Frame Buffer Descriptors (RO, GLMC)
SMM Descriptor (RO, GLMC)
SysTop Descriptor (R, GLMC)
Two Shadow Descriptor (SC, GLMC) A0000h - DFFFFh,
Two Conv Desc (BM, MC)
ROM
Subtractive to PCI
Subtractive to PCI
Subtractive to PCI
Subtractive to PCI
Memory Mapped Frame Buffer
Memory Mapped Video Registers
Memory Mapped VSA
Subtractive to PCI
Frame Buffer
VSA
Subtractive to PCI
Extended Memory
System and Option ROMs
Conventional Memory
FFFC0000h
50000000h
40400000h subtracted from Extended Memory
Top of DRAM
VSA and Video Memory
Top of System (OS) RAM
A0000h - 100000h (640 KB - 1 MB)
Figure 7-2. CPU Core Cache Descriptors
AMD Geode™ GX Processor/CS5535 Companion Device GeodeROM Porting Guide | 31 |
