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cpu-supplement: Document PowerPC SPRG0-2 usage

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Sebastian Huber 2016-11-10 10:16:03 +01:00
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cpu-supplement/powerpc.rst
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@ -270,6 +270,17 @@ Special Registers
The PowerPC architecture includes a number of special registers which are The PowerPC architecture includes a number of special registers which are
critical to the programming model: critical to the programming model:
*Special-Purpose Register General 0 (SPRG0)*
On SMP configurations, this register contains the address of the per-CPU
control of the processor.
*Special-Purpose Register General 1 (SPRG1)*
This register contains the interrupt stack pointer for the outer-most
interrupt service routine.
*Special-Purpose Register General 2 (SPRG2)*
This register contains the address of interrupt stack area begin.
*Machine State Register* *Machine State Register*
The MSR contains the processor mode, power management mode, endian mode, The MSR contains the processor mode, power management mode, endian mode,
exception information, privilege level, floating point available and exception information, privilege level, floating point available and