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[doc] Fix link typos
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@ -9,7 +9,7 @@ It follows these specifications:
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Ibex implements the Machine ISA version 1.12.
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* `RISC-V External Debug Support, version 0.13.2 <https://content.riscv.org/wp-content/uploads/2019/03/riscv-debug-release.pdf>`_
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* `RISC-V Bit-Manipulation Extension, version 1.0.0 <https://github.com/riscv/riscv-bitmanip/releases/download/1.0.0/bitmanip-1.0.0-38-g865e7a7.pdf>`_ and `version 0.93 (draft from January 10, 2021) <https://github.com/riscv/riscv-bitmanip/blob/master/bitmanip-0.93.pdf>`_
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* `PMP Enhancements for memory access and execution prevention on Machine mode (Smepmp) version 1.0 https://github.com/riscv/riscv-tee/blob/191b563b08b31cc2974d604a3b670d8666a2e093/Smepmp/Smepmp.pdf>`_
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* `PMP Enhancements for memory access and execution prevention on Machine mode (Smepmp) version 1.0 <https://github.com/riscv/riscv-tee/blob/191b563b08b31cc2974d604a3b670d8666a2e093/Smepmp/Smepmp.pdf>`_
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Many features in the RISC-V specification are optional, and Ibex can be parametrized to enable or disable some of them.
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@ -3,7 +3,7 @@
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Physical Memory Protection (PMP)
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================================
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The Physical Memory Protection (PMP) unit implements region-based memory access checking in-accordance with the RISC-V Privileged Specification, version 1.12 and implements the `PMP Enhancements for memory access and execution prevention on Machine mode (Smepmp) version 1.0 https://github.com/riscv/riscv-tee/blob/191b563b08b31cc2974d604a3b670d8666a2e093/Smepmp/Smepmp.pdf>`_ extension.
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The Physical Memory Protection (PMP) unit implements region-based memory access checking in-accordance with the RISC-V Privileged Specification, version 1.12 and implements the `PMP Enhancements for memory access and execution prevention on Machine mode (Smepmp) version 1.0 <https://github.com/riscv/riscv-tee/blob/191b563b08b31cc2974d604a3b670d8666a2e093/Smepmp/Smepmp.pdf>`_ extension.
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The following configuration parameters are available to control PMP checking:
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+----------------+---------------+----------------------------------------------------------+
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@ -36,7 +36,7 @@ When the granularity is greater than zero, NA4 mode is not available and will be
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PMP Enhancements
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----------------
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These are described in more detail in `PMP Enhancements for memory access and execution prevention on Machine mode (Smepmp) version 1.0 https://github.com/riscv/riscv-tee/blob/191b563b08b31cc2974d604a3b670d8666a2e093/Smepmp/Smepmp.pdf>`_.
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These are described in more detail in `PMP Enhancements for memory access and execution prevention on Machine mode (Smepmp) version 1.0 <https://github.com/riscv/riscv-tee/blob/191b563b08b31cc2974d604a3b670d8666a2e093/Smepmp/Smepmp.pdf>`_.
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If Ibex is configured to include PMP (PMPEnable is not zero) the PMP enhancements are always included.
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Use of the enhanced behavior is optional, if no writes to ``mseccfg`` occur PMP behavior will remain exactly as if Smepmp was not implemented.
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The enhancements add:
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