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cpu-supplement: Use literal instead of emphasis

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Update #3082.
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Sebastian Huber 2017-08-25 10:35:14 +02:00
parent 873ba805c7
commit 3fdea2d2c0
1 changed files with 11 additions and 10 deletions
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cpu-supplement/powerpc.rst
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@ -125,20 +125,21 @@ Thread-local storage is supported.
64-bit Caveats 64-bit Caveats
============== ==============
* The thread pointer is `r13` in contrast to `r2` used in the 32-bit ABI. * The thread pointer is ``r13`` in contrast to ``r2`` used in the 32-bit ABI.
* The TOC pointer is `r2`. It must be initialized as part of the C run-time * The TOC pointer is ``r2``. It must be initialized as part of the C run-time
setup. A valid stack pointer is not enough to call C functions. They may setup. A valid stack pointer is not enough to call C functions. They may
use the TOC to get addresses and constants. use the TOC to get addresses and constants.
* The TOC must be within the first 2GiB of the address space. This simplifies * The TOC must be within the first 2GiB of the address space. This simplifies
the interrupt prologue, since the `r2` can be set to `.TOC.` via the usual the interrupt prologue, since the ``r2`` can be set to ``.TOC.`` via the
`lis` followed by `ori` combination. The `lis` is subject to sign-extension. usual ``lis`` followed by ``ori`` combination. The ``lis`` is subject to
sign-extension.
* The `PPC_REG_LOAD`, `PPC_REG_STORE`, `PPC_REG_STORE_UPDATE`, and * The ``PPC_REG_LOAD``, ``PPC_REG_STORE``, ``PPC_REG_STORE_UPDATE``, and
`PPC_REG_CMP` macros are available for assembly code to provide register size ``PPC_REG_CMP`` macros are available for assembly code to provide register
operations selected by the GCC `m32` and `m64` options. size operations selected by the GCC ``-m32`` and ``-m64`` options.
* The `MSR[CM]` bit must be set all the time, otherwise the MMU translation my * The ``MSR[CM]`` bit must be set all the time, otherwise the MMU translation
yield unexpected results. The `EPCR[ICM]` or `EPCR[GICM]` bits may be used my yield unexpected results. The ``EPCR[ICM]`` or ``EPCR[GICM]`` bits may be
to enable the 64-bit compute mode for exceptions. used to enable the 64-bit compute mode for exceptions.