diff options
Diffstat (limited to 'linuxthreads/sysdeps/sparc/sparc32')
| -rw-r--r-- | linuxthreads/sysdeps/sparc/sparc32/pspinlock.c | 88 | ||||
| -rw-r--r-- | linuxthreads/sysdeps/sparc/sparc32/pt-machine.h | 83 | ||||
| -rw-r--r-- | linuxthreads/sysdeps/sparc/sparc32/sparcv9/Versions | 5 | ||||
| -rw-r--r-- | linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c | 94 |
4 files changed, 270 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/sparc/sparc32/pspinlock.c b/linuxthreads/sysdeps/sparc/sparc32/pspinlock.c new file mode 100644 index 0000000000..a67dbf901e --- /dev/null +++ b/linuxthreads/sysdeps/sparc/sparc32/pspinlock.c @@ -0,0 +1,88 @@ +/* POSIX spinlock implementation. SPARC32 version. + Copyright (C) 2000 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; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <pthread.h> +#include "internals.h" + +/* This implementation is similar to the one used in the Linux kernel. */ +int +__pthread_spin_lock (pthread_spinlock_t *lock) +{ + asm volatile + ("1: ldstub [%0], %%g2\n" + " orcc %%g2, 0x0, %%g0\n" + " bne,a 2f\n" + " ldub [%0], %%g2\n" + ".subsection 2\n" + "2: orcc %%g2, 0x0, %%g0\n" + " bne,a 2b\n" + " ldub [%0], %%g2\n" + " b,a 1b\n" + ".previous" + : /* no outputs */ + : "r" (lock) + : "g2", "memory", "cc"); + return 0; +} +weak_alias (__pthread_spin_lock, pthread_spin_lock) + + +int +__pthread_spin_trylock (pthread_spinlock_t *lock) +{ + int result; + asm volatile + ("ldstub [%1], %0" + : "=r" (result) + : "r" (lock) + : "memory"); + return result == 0 ? 0 : EBUSY; +} +weak_alias (__pthread_spin_trylock, pthread_spin_trylock) + + +int +__pthread_spin_unlock (pthread_spinlock_t *lock) +{ + *lock = 0; + return 0; +} +weak_alias (__pthread_spin_unlock, pthread_spin_unlock) + + +int +__pthread_spin_init (pthread_spinlock_t *lock, int pshared) +{ + /* We can ignore the `pshared' parameter. Since we are busy-waiting + all processes which can access the memory location `lock' points + to can use the spinlock. */ + *lock = 0; + return 0; +} +weak_alias (__pthread_spin_init, pthread_spin_init) + + +int +__pthread_spin_destroy (pthread_spinlock_t *lock) +{ + /* Nothing to do. */ + return 0; +} +weak_alias (__pthread_spin_destroy, pthread_spin_destroy) diff --git a/linuxthreads/sysdeps/sparc/sparc32/pt-machine.h b/linuxthreads/sysdeps/sparc/sparc32/pt-machine.h new file mode 100644 index 0000000000..322a52051f --- /dev/null +++ b/linuxthreads/sysdeps/sparc/sparc32/pt-machine.h @@ -0,0 +1,83 @@ +/* Machine-dependent pthreads configuration and inline functions. + sparc version. + Copyright (C) 1996-1998, 2000-2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu>. + + 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; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _PT_MACHINE_H +#define _PT_MACHINE_H 1 + +#ifndef PT_EI +# define PT_EI extern inline __attribute__ ((always_inline)) +#endif + +extern long int testandset (int *spinlock); +extern int __compare_and_swap (long int *p, long int oldval, long int newval); + +/* Spinlock implementation; required. */ +PT_EI long int +testandset (int *spinlock) +{ + int ret; + + __asm__ __volatile__("ldstub %1,%0" + : "=r"(ret), "=m"(*spinlock) + : "m"(*spinlock)); + + return ret; +} + + +/* Memory barrier; default is to do nothing */ +#define MEMORY_BARRIER() __asm__ __volatile__("stbar" : : : "memory") + + +/* Get some notion of the current stack. Need not be exactly the top + of the stack, just something somewhere in the current frame. */ +#define CURRENT_STACK_FRAME (stack_pointer + (2 * 64)) +register char *stack_pointer __asm__("%sp"); + + +/* Registers %g6 and %g7 are reserved by the ABI for "system use". + %g7 is specified in the TLS ABI as thread pointer -- we do the same. */ +struct _pthread_descr_struct; +register struct _pthread_descr_struct *__thread_self __asm__("%g7"); + +/* Return the thread descriptor for the current thread. */ +#define THREAD_SELF __thread_self + +/* Initialize the thread-unique value. */ +#define INIT_THREAD_SELF(descr, nr) (__thread_self = (descr)) + +/* Access to data in the thread descriptor is easy. */ +#define THREAD_GETMEM(descr, member) \ + ((void) sizeof (descr), THREAD_SELF->member) +#define THREAD_GETMEM_NC(descr, member) \ + ((void) sizeof (descr), THREAD_SELF->member) +#define THREAD_SETMEM(descr, member, value) \ + ((void) sizeof (descr), THREAD_SELF->member = (value)) +#define THREAD_SETMEM_NC(descr, member, value) \ + ((void) sizeof (descr), THREAD_SELF->member = (value)) + +/* We want the OS to assign stack addresses. */ +#define FLOATING_STACKS 1 + +/* Maximum size of the stack if the rlimit is unlimited. */ +#define ARCH_STACK_MAX_SIZE 8*1024*1024 + +#endif /* pt-machine.h */ diff --git a/linuxthreads/sysdeps/sparc/sparc32/sparcv9/Versions b/linuxthreads/sysdeps/sparc/sparc32/sparcv9/Versions new file mode 100644 index 0000000000..32da57080d --- /dev/null +++ b/linuxthreads/sysdeps/sparc/sparc32/sparcv9/Versions @@ -0,0 +1,5 @@ +libpthread { + GLIBC_PRIVATE { + __pthread_clock_gettime; __pthread_clock_settime; + } +} diff --git a/linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c b/linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c new file mode 100644 index 0000000000..04f588bed5 --- /dev/null +++ b/linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c @@ -0,0 +1,94 @@ +/* POSIX spinlock implementation. SPARC v9 version. + Copyright (C) 2000 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; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <pthread.h> +#include "internals.h" + + +/* This implementation is similar to the one used in the Linux kernel. */ +int +__pthread_spin_lock (pthread_spinlock_t *lock) +{ + asm volatile + ("1: ldstub [%0], %%g2\n" + " brnz,pn %%g2, 2f\n" + " membar #StoreLoad | #StoreStore\n" + ".subsection 2\n" + "2: ldub [%0], %%g2\n" + " brnz,pt %%g2, 2b\n" + " membar #LoadLoad\n" + " b,a,pt %%xcc, 1b\n" + ".previous" + : /* no outputs */ + : "r" (lock) + : "g2", "memory"); + return 0; +} +weak_alias (__pthread_spin_lock, pthread_spin_lock) + + +int +__pthread_spin_trylock (pthread_spinlock_t *lock) +{ + int result; + asm volatile + ("ldstub [%1], %0\n" + "membar #StoreLoad | #StoreStore" + : "=r" (result) + : "r" (lock) + : "memory"); + return result == 0 ? 0 : EBUSY; +} +weak_alias (__pthread_spin_trylock, pthread_spin_trylock) + + +int +__pthread_spin_unlock (pthread_spinlock_t *lock) +{ + asm volatile + ("membar #StoreStore | #LoadStore\n" + "stb %%g0, [%0]" + : + : "r" (lock) + : "memory"); + return 0; +} +weak_alias (__pthread_spin_unlock, pthread_spin_unlock) + + +int +__pthread_spin_init (pthread_spinlock_t *lock, int pshared) +{ + /* We can ignore the `pshared' parameter. Since we are busy-waiting + all processes which can access the memory location `lock' points + to can use the spinlock. */ + *lock = 0; + return 0; +} +weak_alias (__pthread_spin_init, pthread_spin_init) + + +int +__pthread_spin_destroy (pthread_spinlock_t *lock) +{ + /* Nothing to do. */ + return 0; +} +weak_alias (__pthread_spin_destroy, pthread_spin_destroy) |