tmpr4937 TOSHIBA Semiconductor CORPORATION, tmpr4937 Datasheet - Page 269
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tmpr4937
Manufacturer Part Number
tmpr4937
Description
64-bit Tx System Risc
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMPR4937.pdf
(552 pages)
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Memory Space 0 512 MB
Memory Space 1 16 MB
Memory Space 2 1 MB
I/O Space
Figure 10.3.6 Address Conversion for Target (PCI Bus (PCI Bus → G-Bus Address Conversion)
address (GBusAddr[35:0]) is as follows below. GBASE[35:8], and PBASE[39:8] each represent the
setting register of the corresponding access window indicated below in Table 10.3.4. The “&” symbol
indicates a logical AND for each bit, and “|” indicates bit linking.
PCIAddr
PBASE
When expressed as a formula, conversion of a PCI Bus Address (PCIAddr[39:0]) into a G-Bus
Figure 10.3.6 illustrates this address conversion.
256 B
Space
Size
GBusAddr
Memory space 0
Memory space 1
Memory space 2
I/O space
GBASE
If (PCIAddr[39:29] == P2GM0PUBASE.BA[39:32] | P2GM0PLBASE.BA[31:29] then
If (PCIAddr[39:24] == P2GM1PUBASE.BA[39:32] | P2GM1PLBASE.BA[31:24] then
If (PCIAddr[31:20] == P2GM2PBASE.BA[31:20]) then
If (PCIAddr[31:8] == P2GIOPBASE.BA[31:8]) then
Table 10.3.4 Target Access Space Address Mapping Register
39/32
39/32
GBusAddr[35:0] = P2GM0GBASE[35:29] | PCIAddr[28:0];
GBusAddr[35:0] = P2GM1GBASE[35:24] | PCIAddr[23:0];
GBusAddr[35:0] = P2GM2GBASE[35:20] | PCIAddr[19:0];
GBusAddr[35:0] = P2GIOGBASE[35:8] | PCIAddr[7:0];
Address
40-bit
40-bit
32-bit
32-bit
PCI
35
35
Compare
P2GM0PUBASE.BA[39:32] | P2GM0PLBASE.BA[31:29]
P2GM1PUBASE.BA[39:32] | P2GM1PLBASE.BA[31:24]
P2GM2PBASE.BA[31:20]
P2GIOPBASE.BA[31:8]
n = 29 Memory Space 0
n = 24 Memory Space 1
n = 20 Memory Space 2
n = 8
PCI Bus Base Address PBASE
I/O Space
10-11
n n−1
n n−1
n n−1
n n−1
Chapter 10 PCI Controller
P2GM0GBASE.BA[35:29]
P2GM1GBASE.BA[35:24]
P2GM2GBASE.BA[35:20]
P2GIOGBASE.BA[35:8]
G-Bus Base Address
GBASE
0
0
0
0
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