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RTEMS 4.5.1-pre3 On-Line Library


Memory Model Flat Memory Model

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3.2: Flat Memory Model

The i960CA supports a flat 32-bit address space with addresses ranging from 0x00000000 to 0xFFFFFFFF (4 gigabytes). Although the i960CA reserves portions of this address space, application code and data may be placed in any non-reserved areas. Each address is represented by a 32-bit value and is byte addressable. The address may be used to reference a single byte, half-word (2-bytes), word (4 bytes), double-word (8 bytes), triple-word (12 bytes) or quad-word (16 bytes). The i960CA does not support virtual memory or segmentation.

The i960CA allows the memory space to be partitioned into sixteen regions which may be configured individually as big or little endian. RTEMS assumes that the memory regions in which its code, data, and the RTEMS Workspace reside are configured as little endian.


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