diff options
Diffstat (limited to 'mit-pthreads/machdep/engine-alpha-netbsd-1.1.c')
| -rw-r--r-- | mit-pthreads/machdep/engine-alpha-netbsd-1.1.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/mit-pthreads/machdep/engine-alpha-netbsd-1.1.c b/mit-pthreads/machdep/engine-alpha-netbsd-1.1.c new file mode 100644 index 00000000000..c1ff04db16d --- /dev/null +++ b/mit-pthreads/machdep/engine-alpha-netbsd-1.1.c @@ -0,0 +1,196 @@ +/* ==== machdep.c ============================================================ + * Copyright (c) 1993, 1994 Chris Provenzano, proven@athena.mit.edu + * + * Description : Machine dependent functions for NetBSD/Alpha 1.1(+) + * + * 1.00 93/08/04 proven + * -Started coding this file. + * + * 95/04/22 cgd + * -Modified to make it go with NetBSD/Alpha + */ + +#ifndef lint +static const char rcsid[] = "engine-alpha-osf1.c,v 1.4.4.1 1995/12/13 05:41:37 proven Exp"; +#endif + +#include <pthread.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/syscall.h> +#include <stdlib.h> +#include <fcntl.h> +#include <stdio.h> + +/* ========================================================================== + * machdep_save_state() + */ +int machdep_save_state(void) +{ + return __machdep_save_int_state(pthread_run->machdep_data.machdep_istate); +} + +void machdep_restore_state(void) +{ + __machdep_restore_int_state(pthread_run->machdep_data.machdep_istate); +} + +void machdep_save_float_state (void) +{ + __machdep_save_fp_state(pthread_run->machdep_data.machdep_fstate); +} + +void machdep_restore_float_state (void) +{ + __machdep_restore_fp_state(pthread_run->machdep_data.machdep_fstate); +} + +/* ========================================================================== + * machdep_set_thread_timer() + */ +void machdep_set_thread_timer(struct machdep_pthread *machdep_pthread) +{ + if (setitimer(ITIMER_VIRTUAL, &(machdep_pthread->machdep_timer), NULL)) { + PANIC(); + } +} + +/* ========================================================================== + * machdep_unset_thread_timer() + */ +void machdep_unset_thread_timer(struct machdep_pthread *machdep_pthread) +{ + struct itimerval zeroval = { { 0, 0 }, { 0, 0} }; + + if (setitimer(ITIMER_VIRTUAL, &zeroval, NULL)) { + PANIC(); + } +} + +/* ========================================================================== + * machdep_pthread_cleanup() + */ +void *machdep_pthread_cleanup(struct machdep_pthread *machdep_pthread) +{ + return(machdep_pthread->machdep_stack); +} + +/* ========================================================================== + * machdep_pthread_start() + */ +void machdep_pthread_start(void) +{ + context_switch_done(); + pthread_sched_resume (); + + /* Run current threads start routine with argument */ + pthread_exit(pthread_run->machdep_data.start_routine + (pthread_run->machdep_data.start_argument)); + + /* should never reach here */ + PANIC(); +} + +/* ========================================================================== + * __machdep_stack_free() + */ +void __machdep_stack_free(void * stack) +{ + free(stack); +} + +/* ========================================================================== + * __machdep_stack_alloc() + */ +void * __machdep_stack_alloc(size_t size) +{ + void * stack; + + return(malloc(size)); +} + +/* ========================================================================== + * __machdep_pthread_create() + */ +void __machdep_pthread_create(struct machdep_pthread *machdep_pthread, + void *(* start_routine)(), void *start_argument, + long stack_size, long nsec, long flags) +{ + machdep_pthread->start_routine = start_routine; + machdep_pthread->start_argument = start_argument; + + machdep_pthread->machdep_timer.it_value.tv_sec = 0; + machdep_pthread->machdep_timer.it_interval.tv_sec = 0; + machdep_pthread->machdep_timer.it_interval.tv_usec = 0; + machdep_pthread->machdep_timer.it_value.tv_usec = nsec / 1000; + + /* Set up new stack frame so that it looks like it returned from a + longjmp() to the beginning of machdep_pthread_start(). */ + machdep_pthread->machdep_istate[8/*ISTATE_RA*/] = 0; + machdep_pthread->machdep_istate[0/*ISTATE_PC*/] = (long)machdep_pthread_start; + machdep_pthread->machdep_istate[10/*ISTATE_PV*/] = (long)machdep_pthread_start; + + /* Alpha stack starts high and builds down. */ + { + long stk_addr = (long) machdep_pthread->machdep_stack; + stk_addr += stack_size - 1024; + stk_addr &= ~15; + machdep_pthread->machdep_istate[9/*ISTATE_SP*/] = stk_addr; + } +} + +int safe_store (loc, new) + int *loc; + int new; +{ + int locked, old; + asm ("mb" : : : "memory"); + do { + asm ("ldl_l %0,%1" : "=r" (old) : "m" (*loc)); + asm ("stl_c %0,%1" : "=r" (locked), "=m" (*loc) : "0" (new)); + } while (!locked); + asm ("mb" : : : "memory"); + return old; +} + +/* ========================================================================== + * machdep_sys_creat() + */ +machdep_sys_creat(char * path, int mode) +{ + return(machdep_sys_open(path, O_WRONLY | O_CREAT | O_TRUNC, mode)); +} + +/* ========================================================================== + * machdep_sys_wait3() + */ +machdep_sys_wait3(int * b, int c, int * d) +{ + return(machdep_sys_wait4(0, b, c, d)); +} + +/* ========================================================================== + * machdep_sys_waitpid() + */ +machdep_sys_waitpid(int a, int * b, int c) +{ + return(machdep_sys_wait4(a, b, c, NULL)); +} + +/* ========================================================================== + * machdep_sys_getdtablesize() + */ +machdep_sys_getdtablesize() +{ + return(sysconf(_SC_OPEN_MAX)); +} + +/* ========================================================================== + * machdep_sys_lseek() + */ +off_t machdep_sys_lseek(int fd, off_t offset, int whence) +{ + extern off_t __syscall(); + + return(__syscall((quad_t)SYS_lseek, fd, 0, offset, whence)); +} |