version 1.55, 2018/11/07 15:09:41
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version 1.56, 2018/11/11 16:37:42
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Line 23 Matt Thomas is the maintainer of NetBSD/
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Line 23 Matt Thomas is the maintainer of NetBSD/
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### CPU types |
### CPU types |
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The evbarm port can be built with a variety of CPU options. There are |
The evbarm port can be built with a variety of CPU options. There are |
three main variables: the instruction set, the endianness, and whether |
four main variables: the word size, the instruction set, the |
there is hardware floating point. By default the CPU type is "earm", |
endianness, and whether there is hardware floating point. By default |
and this implies little endian (el when explicitly stated), and soft |
the CPU type is "earm", and this implies aarch32 (32-bit), \todo cpu |
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architecture, little endian (el when explicitly stated), and soft |
(emulated) floating point. Another example, suitable for Raspberry PI |
(emulated) floating point. Another example, suitable for Raspberry PI |
2, is earmv7hf, which is the v7 instruction set, little endian, |
2, is earmv7hf, which is aarch32, the v7 instruction set, little |
and hardware floating point. |
endian, and hardware floating point. |
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Typically, various boards are best compiled with a CPU type that |
Typically, various boards are best compiled with a CPU type that |
matches the board's CPU and floating point support, but generally a |
matches the board's CPU and floating point support, but generally a |
lower CPU instruction set version is workable on a newer board. See |
lower CPU instruction set version is workable on a newer board. See |
build.sh and look for aliases for the evbarm port. |
build.sh and look for aliases for the evbarm port. |
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Some processors can operate as arm or the 64-bit ARM variant, aarch64, which is supported by |
Through NetBSD 8, the evbarm port has supported exclusively the |
[[NetBSD/aarch64|aarch64]]. |
aarch32 (32-bit CPU) sub-family of the ARM architecture. Some |
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processors, such as many supporting the armv8 CPU architecture, also |
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support a 64-bit instruction set, referred to as aarch64. This is |
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sometimes referred to as a distinct port, [[NetBSD/aarch64|aarch64]], |
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with code in src/sys/arch/aarch64, but it is built as the evbarm port |
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with aarch64 cpu type, and available as the alias evbarm64. |
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### Kernels and userland |
### Kernels and userland |
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