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Diffstat (limited to 'docs/marvell/misc/mvebu-amb.txt')
| -rw-r--r-- | docs/marvell/misc/mvebu-amb.txt | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/docs/marvell/misc/mvebu-amb.txt b/docs/marvell/misc/mvebu-amb.txt new file mode 100644 index 00000000..40a74674 --- /dev/null +++ b/docs/marvell/misc/mvebu-amb.txt @@ -0,0 +1,45 @@ +AMB - AXI MBUS address decoding +------------------------------- + +- The Runit offers a second level of address windows lookup. It is used to map transaction towards +the CD BootROM, SPI0, SPI1 and Device bus (NOR). +- The Runit contains eight configurable windows. Each window defines a contiguous, +address space and the properties associated with that address space. + +Unit Bank ATTR +Device-Bus DEV_BOOT_CS 0x2F + DEV_CS0 0x3E + DEV_CS1 0x3D + DEV_CS2 0x3B + DEV_CS3 0x37 +SPI-0 SPI_A_CS0 0x1E + SPI_A_CS1 0x5E + SPI_A_CS2 0x9E + SPI_A_CS3 0xDE + SPI_A_CS4 0x1F + SPI_A_CS5 0x5F + SPI_A_CS6 0x9F + SPI_A_CS7 0xDF +SPI1 SPI_B_CS0 0x1A + SPI_B_CS1 0x5A + SPI_B_CS2 0x9A + SPI_B_CS3 0xDA +BOOT_ROM BOOT_ROM 0x1D +UART UART 0x01 + +Mandatory functions: + - marvell_get_amb_reg_offs + returns the base address of the AXI-MBUS(AMB) unit + - marvell_get_amb_memory_map + returns the AMB windows configuration and the number of windows + +Mandatory structures: + amb_memory_map - Array that include the configuration of the windows + every window/entry is a struct which has 2 parameters: + - base address of the window + - Attribute of the window + +Examples: + struct amb_win amb_memory_map[] = { + {0xf900, AMB_DEV_CS0_ID}, + }; |