diff options
| -rw-r--r-- | nptl/ChangeLog | 12 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h | 5 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/Makefile | 1 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/cpu_relax.S | 1 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sparc/sparc64/Makefile | 2 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sparc/sparc64/cpu_relax.S | 67 |
6 files changed, 88 insertions, 0 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index 40ddc25..803df62 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,3 +1,15 @@ +2012-10-28 David S. Miller <davem@davemloft.net> + + * sysdeps/unix/sysv/linux/sparc/lowlevellock.h (BUSY_WAIT_NOP): + Define when we have v9 instructions available. + * sysdeps/unix/sysv/linux/sparc/sparc64/cpu_relax.S: New file. + * sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/cpu_relax.S: New + file. + * sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/Makefile: New + file. + * sysdeps/unix/sysv/linux/sparc/sparc64/Makefile: Add cpu_relax + to libpthread-routines. + 2012-10-25 Roland McGrath <roland@hack.frob.com> * tst-cond-except.c (TEST_FUNCTION): New macro. diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h index fafb087..e049562 100644 --- a/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/sparc/lowlevellock.h @@ -50,6 +50,11 @@ #define LLL_PRIVATE 0 #define LLL_SHARED FUTEX_PRIVATE_FLAG +#ifndef __sparc32_atomic_do_lock +/* Delay in spinlock loop. */ +extern void __cpu_relax(void); +#define BUSY_WAIT_NOP __cpu_relax() +#endif #if !defined NOT_IN_libc || defined IS_IN_rtld /* In libc.so or ld.so all futexes are private. */ diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/Makefile b/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/Makefile new file mode 100644 index 0000000..f7acc01 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/Makefile @@ -0,0 +1 @@ +libpthread-routines += cpu_relax diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/cpu_relax.S b/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/cpu_relax.S new file mode 100644 index 0000000..4ac4d14 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/cpu_relax.S @@ -0,0 +1 @@ +#include <sparc64/cpu_relax.S> diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/sparc64/Makefile b/nptl/sysdeps/unix/sysv/linux/sparc/sparc64/Makefile index 774b267..656d2e0 100644 --- a/nptl/sysdeps/unix/sysv/linux/sparc/sparc64/Makefile +++ b/nptl/sysdeps/unix/sysv/linux/sparc/sparc64/Makefile @@ -1,3 +1,5 @@ +libpthread-routines += cpu_relax + ifeq ($(subdir),nptl) CFLAGS-pause.c += -fexceptions CFLAGS-sigsuspend.c += -fexceptions diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/sparc64/cpu_relax.S b/nptl/sysdeps/unix/sysv/linux/sparc/sparc64/cpu_relax.S new file mode 100644 index 0000000..9e64c50 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/sparc/sparc64/cpu_relax.S @@ -0,0 +1,67 @@ +/* CPU strand yielding for busy loops. + Copyright (C) 2012 Free Software Foundation, Inc. + Contributed by David S. Miller (davem@davemloft.net) + 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/>. */ + +#include <sysdep.h> + + .text +__cpu_relax_generic: + rd %ccr, %g0 + rd %ccr, %g0 + rd %ccr, %g0 + retl + nop + .size __cpu_relax_generic,.-__cpu_relax_generic + +__cpu_relax_pause: + wr %g0, 128, %asr27 + retl + nop + .size __cpu_relax_pause,.-__cpu_relax_pause + +ENTRY(__cpu_relax) + .type __cpu_relax, @gnu_indirect_function +# ifdef SHARED + SETUP_PIC_REG_LEAF(o3, o5) +# endif + set HWCAP_SPARC_PAUSE, %o1 + andcc %o0, %o1, %g0 + be 1f + nop +# ifdef SHARED + sethi %gdop_hix22(__cpu_relax_pause), %o1 + xor %o1, %gdop_lox10(__cpu_relax_pause), %o1 +# else + set __cpu_relax_pause, %o1 +# endif + ba 10f + nop +1: +# ifdef SHARED + sethi %gdop_hix22(__cpu_relax_generic), %o1 + xor %o1, %gdop_lox10(__cpu_relax_generic), %o1 +# else + set __cpu_relax_generic, %o1 +# endif +10: +# ifdef SHARED + add %o3, %o1, %o1 +# endif + retl + mov %o1, %o0 +END(__cpu_relax) |