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Diffstat (limited to 'sysdeps/powerpc/sys/platform/ppc.h')
| -rw-r--r-- | sysdeps/powerpc/sys/platform/ppc.h | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/sysdeps/powerpc/sys/platform/ppc.h b/sysdeps/powerpc/sys/platform/ppc.h deleted file mode 100644 index 4a0c015766..0000000000 --- a/sysdeps/powerpc/sys/platform/ppc.h +++ /dev/null @@ -1,146 +0,0 @@ -/* Facilities specific to the PowerPC architecture - Copyright (C) 2012-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#ifndef _SYS_PLATFORM_PPC_H -#define _SYS_PLATFORM_PPC_H 1 - -#include <features.h> -#include <stdint.h> -#include <bits/ppc.h> - -/* Read the Time Base Register. */ -static __inline__ uint64_t -__ppc_get_timebase (void) -{ -#if __GNUC_PREREQ (4, 8) - return __builtin_ppc_get_timebase (); -#else -# ifdef __powerpc64__ - uint64_t __tb; - /* "volatile" is necessary here, because the user expects this assembly - isn't moved after an optimization. */ - __asm__ volatile ("mfspr %0, 268" : "=r" (__tb)); - return __tb; -# else /* not __powerpc64__ */ - uint32_t __tbu, __tbl, __tmp; \ - __asm__ volatile ("0:\n\t" - "mftbu %0\n\t" - "mftbl %1\n\t" - "mftbu %2\n\t" - "cmpw %0, %2\n\t" - "bne- 0b" - : "=r" (__tbu), "=r" (__tbl), "=r" (__tmp)); - return (((uint64_t) __tbu << 32) | __tbl); -# endif /* not __powerpc64__ */ -#endif -} - -/* The following functions provide hints about the usage of shared processor - resources, as defined in ISA 2.06 and newer. */ - -/* Provides a hint that performance will probably be improved if shared - resources dedicated to the executing processor are released for use by other - processors. */ -static __inline__ void -__ppc_yield (void) -{ - __asm__ volatile ("or 27,27,27"); -} - -/* Provides a hint that performance will probably be improved if shared - resources dedicated to the executing processor are released until - all outstanding storage accesses to caching-inhibited storage have been - completed. */ -static __inline__ void -__ppc_mdoio (void) -{ - __asm__ volatile ("or 29,29,29"); -} - -/* Provides a hint that performance will probably be improved if shared - resources dedicated to the executing processor are released until all - outstanding storage accesses to cacheable storage for which the data is not - in the cache have been completed. */ -static __inline__ void -__ppc_mdoom (void) -{ - __asm__ volatile ("or 30,30,30"); -} - - -/* ISA 2.05 and beyond support the Program Priority Register (PPR) to adjust - thread priorities based on lock acquisition, wait and release. The ISA - defines the use of form 'or Rx,Rx,Rx' as the way to modify the PRI field. - The unprivileged priorities are: - Rx = 1 (low) - Rx = 2 (medium) - Rx = 6 (medium-low/normal) - The 'or' instruction form is a nop in previous hardware, so it is safe to - use unguarded. The default value is 'medium'. - */ - -static __inline__ void -__ppc_set_ppr_med (void) -{ - __asm__ volatile ("or 2,2,2"); -} - -static __inline__ void -__ppc_set_ppr_med_low (void) -{ - __asm__ volatile ("or 6,6,6"); -} - -static __inline__ void -__ppc_set_ppr_low (void) -{ - __asm__ volatile ("or 1,1,1"); -} - -/* Power ISA 2.07 (Book II, Chapter 3) extends the priorities that can be set - to the Program Priority Register (PPR). The form 'or Rx,Rx,Rx' is used to - modify the PRI field of the PPR, the same way as described above. - The new priority levels are: - Rx = 31 (very low) - Rx = 5 (medium high) - Any program can set the priority to very low, low, medium low, and medium, - as these are unprivileged. - The medium high priority, on the other hand, 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 PRI - field is set to medium. - */ - -#ifdef _ARCH_PWR8 - -static __inline__ void -__ppc_set_ppr_very_low (void) -{ - __asm__ volatile ("or 31,31,31"); -} - -static __inline__ void -__ppc_set_ppr_med_high (void) -{ - __asm__ volatile ("or 5,5,5"); -} - -#endif - -#endif /* sys/platform/ppc.h */ |