There are two configurable PS to PL AXI interfaces. One is from the FPD to the PL (via the LPD). The other is from the LPD to the PS. The interface parameters and the PS-to-PL AXI interface attributes are listed in the following table.
The two PS to PL interfaces are mapped within the low 4 GB memory address space.
| Interface Name | Alternate Name | Address Width (Bits) | Data Width (Bits) | Base Address | Size | Notes |
|---|---|---|---|---|---|---|
| From FPD | ||||||
| FPD_AXI_PL | M_AXI_FPD, AFIFS | 44 | 32, 64, or 128 |
0xA400_0000
|
192 MB | |
0xB000_0000
|
256 MB | |||||
| FPD_ADDR_PL | PLAT | 48 | None | N/A | N/A | Address translation only |
| From LPD | ||||||
| LPD_AXI_PL | M_AXI_LPD, AFIFS | 44 | 32, 64, or 128 |
0x8000_0000
|
512 MB | |
Note: The data bus
width of the LPD_AXI_PL and FPD_AXI_PL interfaces are controlled by the
LPD_AXI_PL_Width
and
FPD_AXI_PL_Width
registers,
respectively.