[Skiboot] [PATCH v3 1/3] powernv:idle: Add IDLE_STATE_ENTER_SEQ_NORET macro
bsingharora at gmail.com
Tue Nov 29 21:42:20 AEDT 2016
On 10/11/16 18:54, Gautham R. Shenoy wrote:
> From: "Gautham R. Shenoy" <ego at linux.vnet.ibm.com>
> Currently all the low-power idle states are expected to wake up
> at reset vector 0x100. Which is why the macro IDLE_STATE_ENTER_SEQ
> that puts the CPU to an idle state and never returns.
> On ISA_300, when the ESL and EC bits in the PSSCR are zero, the
> CPU is expected to wake up at the next instruction of the idle
> This patch adds a new macro named IDLE_STATE_ENTER_SEQ_NORET for the
I think something like IDLE_STATE_ENTER_SEQ_LOSE_CTX would be better?
> no-return variant and reuses the name IDLE_STATE_ENTER_SEQ
> for a variant that allows resuming operation at the instruction next
> to the idle-instruction.
> +#define IDLE_STATE_ENTER_SEQ_NORET(IDLE_INST) \
> + IDLE_STATE_ENTER_SEQ(IDLE_INST) \
So we start off with both as the same?
> b .
> #endif /* CONFIG_PPC_P7_NAP */
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