From d90c8137a88f9a456b711a741b88e5c6ef5735d8 Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Fri, 7 Sep 2018 15:31:31 +0200 Subject: c-user: Mention per-processor data Close #3507. --- c-user/symmetric_multiprocessing_services.rst | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/c-user/symmetric_multiprocessing_services.rst b/c-user/symmetric_multiprocessing_services.rst index 638292b..b2773e7 100644 --- a/c-user/symmetric_multiprocessing_services.rst +++ b/c-user/symmetric_multiprocessing_services.rst @@ -791,3 +791,21 @@ from the executing to the heir thread neither the stack of the executing nor the heir thread must be used during interrupt processing. For this purpose a temporary per-processor stack is set up which may be used by the interrupt prologue before the stack is switched to the interrupt stack. + +Per-Processor Data +------------------ + +RTEMS provides two means for per-processor data: + +1. Per-processor data which is used by RTEMS itself is contained in the + `Per_CPU_Control` structure. The application configuration via + `` creates a table of these structures + (`_Per_CPU_Information[]`). The table is dimensioned according to the count + of configured processors + (:ref:`CONFIGURE_MAXIMUM_PROCESSORS `). + +2. For low level support libraries an API for statically allocated + per-processor data is available via + ` `_. + This API is not intended for general application use. Please ask on the + development mailing list in case you want to use it. -- cgit v1.2.3