From 1747fcda4902a3b46183d93fb16ed9b436b2608b Mon Sep 17 00:00:00 2001 From: "Gabriel F. T. Gomes" Date: Mon, 10 Aug 2015 10:58:12 -0300 Subject: PowerPC: Extend Program Priority Register support This patch adds extra inline functions to change the Program Priority Register from ISA 2.07. 2015-08-19 Gabriel F. T. Gomes * sysdeps/powerpc/sys/platform/ppc.h (__ppc_set_ppr_med_high, __ppc_set_ppr_very_low): New functions. * manual/platform.texi: Add documentation about __ppc_set_ppr_med_high and __ppc_set_ppr_very_low. --- manual/platform.texi | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'manual') diff --git a/manual/platform.texi b/manual/platform.texi index 872e32ecb3..cb166641fb 100644 --- a/manual/platform.texi +++ b/manual/platform.texi @@ -97,3 +97,21 @@ Set the Program Priority Register to low value. @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} Set the Program Priority Register to medium low value. @end deftypefun + +Power ISA 2.07 extends the priorities that can be set to the Program Priority +Register (PPR). The following functions implement the new priority levels: +very low and medium high. + +@deftypefun {void} __ppc_set_ppr_very_low (void) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +Set the Program Priority Register to very low value. +@end deftypefun + +@deftypefun {void} __ppc_set_ppr_med_high (void) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +Set the Program Priority Register to medium high value. The medium high +priority is privileged and may only be set during certain time intervals by +problem-state programs. If the program priority is medium high when the time +interval expires or if an attempt is made to set the priority to medium high +when it is not allowed, the priority is set to medium. +@end deftypefun -- cgit 1.4.1