Generic on-chip SRAM Simple IO memory regions to be managed by the genalloc API. Required properties: - compatible : mmio-sram or atmel,sama5d2-securam - reg : SRAM iomem address range Reserving sram areas: --------------------- Each child of the sram node specifies a region of reserved memory. Each child node should use a 'reg' property to specify a specific range of reserved memory. Following the generic-names recommended practice, node names should reflect the purpose of the node. Unit address (@
) should be appended to the name. Required properties in the sram node: - #address-cells, #size-cells : should use the same values as the root node - ranges : standard definition, should translate from local addresses within the sram to bus addresses Optional properties in the sram node: - no-memory-wc : the flag indicating, that SRAM memory region has not to be remapped as write combining. WC is used by default. Required properties in the area nodes: - reg : iomem address range, relative to the SRAM range Optional properties in the area nodes: - compatible : standard definition, should contain a vendor specific string in the form ,[-] - pool : indicates that the particular reserved SRAM area is addressable and in use by another device or devices - export : indicates that the reserved SRAM area may be accessed outside of the kernel, e.g. by bootloader or userspace - label : the name for the reserved partition, if omitted, the label is taken from the node name excluding the unit address. Example: sram: sram@5c000000 { compatible = "mmio-sram"; reg = <0x5c000000 0x40000>; /* 256 KiB SRAM at address 0x5c000000 */ #address-cells = <1>; #size-cells = <1>; ranges = <0 0x5c000000 0x40000>; smp-sram@100 { compatible = "socvendor,smp-sram"; reg = <0x100 0x50>; }; device-sram@1000 { reg = <0x1000 0x1000>; pool; }; exported@20000 { reg = <0x20000 0x20000>; export; }; };