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1 U-Boot for the Xtensa Architecture
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8 Diamond Cores are pre-configured instances available for license and
12 and custom instructions, registers and co-processors. The custom core
18 Xtensa CPUs in U-Boot. Therefore, there is only a single 'xtensa' CPU
19 in the cpu tree of U-Boot.
21 In the same manner as the Linux port to Xtensa, U-Boot adapts to an
24 abstraction layer (HAL). For the purpose of U-Boot, the HAL consists only
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33 a variant-specific directory located in the arch/xtensa/include/asm
34 directory. The name of that directory starts with 'arch-' followed by
35 the name for the processor configuration, for example, arch-dc233c for
40 The following files are part of the overlay but not used by U-Boot.
42     tie.h	Co-processors and custom extensions defined
45     tie-asm.h	Assembly macros to access custom-defined registers
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53 U-Boot provides a jump table of entrypoints to exported functions
65 arbitrary (separately compiled) function a bit tricky. Use of a simple
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80 U-Boot does not check if memory addresses given as arguments to commands
91 U-Boot for Xtensa provides a special memory exception handler that
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