From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- sysdeps/mach/alpha/machine-lock.h | 80 +++++++++++++++++++++++++++++++++++++++ sysdeps/mach/alpha/machine-sp.h | 36 ++++++++++++++++++ sysdeps/mach/alpha/syscall.S | 39 +++++++++++++++++++ sysdeps/mach/alpha/sysdep.h | 41 ++++++++++++++++++++ sysdeps/mach/alpha/thread_state.h | 39 +++++++++++++++++++ 5 files changed, 235 insertions(+) create mode 100644 sysdeps/mach/alpha/machine-lock.h create mode 100644 sysdeps/mach/alpha/machine-sp.h create mode 100644 sysdeps/mach/alpha/syscall.S create mode 100644 sysdeps/mach/alpha/sysdep.h create mode 100644 sysdeps/mach/alpha/thread_state.h (limited to 'sysdeps/mach/alpha') diff --git a/sysdeps/mach/alpha/machine-lock.h b/sysdeps/mach/alpha/machine-lock.h new file mode 100644 index 0000000000..42e21d8df2 --- /dev/null +++ b/sysdeps/mach/alpha/machine-lock.h @@ -0,0 +1,80 @@ +/* Machine-specific definition for spin locks. Alpha version. +Copyright (C) 1994 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#ifndef _MACHINE_LOCK_H +#define _MACHINE_LOCK_H + +/* The type of a spin lock variable. */ + +typedef __volatile long int __spin_lock_t; + +/* Value to initialize `__spin_lock_t' variables to. */ + +#define __SPIN_LOCK_INITIALIZER 0L + + +#ifndef _EXTERN_INLINE +#define _EXTERN_INLINE extern __inline +#endif + +/* Unlock LOCK. */ + +_EXTERN_INLINE void +__spin_unlock (__spin_lock_t *__lock) +{ + __asm__ __volatile__ ("mb; stq $31, %0; mb" + : "=m" (__lock)); +} + +/* Try to lock LOCK; return nonzero if we locked it, zero if another has. */ + +_EXTERN_INLINE int +__spin_try_lock (register __spin_lock_t *__lock) +{ + register long int __rtn, __tmp; + + do + { + __asm__ __volatile__ ("mb; ldq_l %0,%1" /* Load lock value into TMP. */ + : "=r" (__tmp) : "m" (*__lock)); + __rtn = 2; /* Load locked value into RTN. */ + if (__tmp) + /* The lock is already taken. */ + return 0; + + /* The lock is not taken; try to get it now. */ + __asm__ __volatile__ ("stq_c %0,%1" + : "=r" (__rtn), "=m" (*__lock) + : "0" (__rtn), "1" (*__lock)); + /* RTN is clear if stq_c was interrupted; loop to try the lock again. */ + } while (! __rtn); + /* RTN is now nonzero; we have the lock. */ + return __rtn; +} + +/* Return nonzero if LOCK is locked. */ + +_EXTERN_INLINE int +__spin_lock_locked (__spin_lock_t *__lock) +{ + return *__lock != 0; +} + + +#endif /* machine-lock.h */ diff --git a/sysdeps/mach/alpha/machine-sp.h b/sysdeps/mach/alpha/machine-sp.h new file mode 100644 index 0000000000..6a8a3c6d40 --- /dev/null +++ b/sysdeps/mach/alpha/machine-sp.h @@ -0,0 +1,36 @@ +/* Machine-specific function to return the stack pointer. Alpha version. +Copyright (C) 1994 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#ifndef _MACHINE_SP_H +#define _MACHINE_SP_H + +/* Return the current stack pointer. */ + +#ifndef _EXTERN_INLINE +#define _EXTERN_INLINE extern __inline +#endif + +_EXTERN_INLINE void * +__thread_stack_pointer (void) +{ + register void *__sp__ __asm__ ("$30"); + return __sp__; +} + +#endif /* machine-sp.h */ diff --git a/sysdeps/mach/alpha/syscall.S b/sysdeps/mach/alpha/syscall.S new file mode 100644 index 0000000000..31ccb5fc30 --- /dev/null +++ b/sysdeps/mach/alpha/syscall.S @@ -0,0 +1,39 @@ +/* Copyright (C) 1994 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include + +ENTRY (syscall) + .frame sp,0,ra + mov a0, v0 /* Load system call number from first arg. */ + mov a1, a0 + mov a2, a1 + mov a3, a2 + mov a4, a3 + mov a5, a4 + /* Load the remaining possible args (up to 11) from the stack. */ + ldq a5,0(sp) + ldq t0,8(sp) + ldq t1,16(sp) + ldq t2,24(sp) + ldq t3,32(sp) + ldq t4,40(sp) + call_pal op_chmk + RET + .end syscall diff --git a/sysdeps/mach/alpha/sysdep.h b/sysdeps/mach/alpha/sysdep.h new file mode 100644 index 0000000000..a32766270b --- /dev/null +++ b/sysdeps/mach/alpha/sysdep.h @@ -0,0 +1,41 @@ +/* Copyright (C) 1994 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#define MOVE(x,y) mov x, y + +#define LOSE asm volatile ("call_pal 0") /* halt */ + +#define START_MACHDEP \ + asm ("_start: mov $30, $16\n" /* Put initial SP in a0. */ \ + " br $27, 1f\n" /* Load GP from PC. */ \ + "1: ldgp $29, 0($27)\n" \ + " jmp $26, _start0"); /* Jump to _start0; don't return. */ +#define START_ARGS char **sparg +#define SNARF_ARGS(argc, argv, envp) \ + (envp = &(argv = &sparg[1])[(argc = *(int *) sparg) + 1]) + +#define CALL_WITH_SP(fn, sp) \ + ({ register long int __fn = (long int) fn, __sp = (long int) sp; \ + asm volatile ("mov %0,$30; jmp $31, (%1); ldgp $29, 0(%1)" \ + : : "r" (__sp), "r" (__fn)); }) + +#define ENTRY(name) LEAF(name, ***loser no arg count***) + +#define STACK_GROWTH_DOWN + +#include_next diff --git a/sysdeps/mach/alpha/thread_state.h b/sysdeps/mach/alpha/thread_state.h new file mode 100644 index 0000000000..28b0a15758 --- /dev/null +++ b/sysdeps/mach/alpha/thread_state.h @@ -0,0 +1,39 @@ +/* Mach thread state definitions for machine-independent code. Alpha version. +Copyright (C) 1994 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include + +#define MACHINE_THREAD_STATE_FLAVOR ALPHA_THREAD_STATE +#define MACHINE_THREAD_STATE_COUNT ALPHA_THREAD_STATE_COUNT + +#define machine_thread_state alpha_thread_state + +#define PC pc +#define SP r30 +#define SYSRETURN r0 + +struct machine_thread_all_state + { + int set; /* Mask of bits (1 << FLAVOR). */ + struct alpha_thread_state basic; + struct alpha_exc_state exc; + struct alpha_float_state fpu; + }; + +#include_next -- cgit v1.2.3