diff options
Diffstat (limited to 'docs/plat/marvell/armada/misc/mvebu-iob.rst')
-rw-r--r-- | docs/plat/marvell/armada/misc/mvebu-iob.rst | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/docs/plat/marvell/armada/misc/mvebu-iob.rst b/docs/plat/marvell/armada/misc/mvebu-iob.rst new file mode 100644 index 0000000..aa41822 --- /dev/null +++ b/docs/plat/marvell/armada/misc/mvebu-iob.rst @@ -0,0 +1,52 @@ +Marvell IOB address decoding bindings +===================================== + +IO bridge configuration driver (3rd stage address translation) for Marvell Armada 8K and 8K+ SoCs. + +The IOB includes a description of the address decoding configuration. + +IOB supports up to n (in CP110 n=24) windows for external memory transaction. +When a transaction passes through the IOB, its address is compared to each of +the enabled windows. If there is a hit and it passes the security checks, it is +advanced to the target port. + +Mandatory functions +------------------- + +- marvell_get_iob_memory_map + Returns the IOB windows configuration and the number of windows + +Mandatory structures +-------------------- + +- iob_memory_map + Array that includes the configuration of the windows. Every window/entry is + a struct which has 3 parameters: + + - Base address of the window + - Size of the window + - Target-ID of the window + +Target ID options +----------------- + +- **0x0** = Internal configuration space +- **0x1** = MCI0 +- **0x2** = PEX1_X1 +- **0x3** = PEX2_X1 +- **0x4** = PEX0_X4 +- **0x5** = NAND flash +- **0x6** = RUNIT (NOR/SPI/BootRoom) +- **0x7** = MCI1 + +Example +------- + +.. code:: c + + struct addr_map_win iob_memory_map[] = { + {0x00000000f7000000, 0x0000000001000000, PEX1_TID}, /* PEX1_X1 window */ + {0x00000000f8000000, 0x0000000001000000, PEX2_TID}, /* PEX2_X1 window */ + {0x00000000f6000000, 0x0000000001000000, PEX0_TID}, /* PEX0_X4 window */ + {0x00000000f9000000, 0x0000000001000000, NAND_TID} /* NAND window */ + }; |