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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 v3.0, 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 instruction. This patch adds a new macro named IDLE_STATE_ENTER_SEQ_NORET for the 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. Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.