$NetBSD: patch-ae,v 1.2 1998/12/28 22:22:00 bad Exp $

--- /dev/null	Sun Dec 27 17:45:54 1998
+++ machdep/engine-alpha-netbsd-1.3.c	Mon Mar  9 11:30:59 1998
@@ -0,0 +1,204 @@
+/* ==== 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));
+}
+
+/* ==========================================================================
+ * machdep_sys_getdirentries()
+ */
+machdep_sys_getdirentries(int fd, char * buf, int len, int * seek)
+{
+        return(machdep_sys_getdents(fd, buf, len));
+}