Initial creation of sourceware repository

2025-12-26 17:18:55 +00:00 · 1999-04-16 01:35:26 +00:00
parent cd946cff9e
commit c906108c21
2470 changed files with 976797 additions and 0 deletions
--- a/sim/z8k/mem.c
+++ b/sim/z8k/mem.c
@@ -0,0 +1,126 @@
+/* memory support for Z8KSIM
+   Copyright (C) 1987, 1992 Free Software Foundation, Inc.
+
+This file is part of Z8KSIM
+
+Z8KSIM is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+Z8KSIM 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Z8KZIM; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "config.h"
+
+#include <ansidecl.h>
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#include "tm.h"
+#include "mem.h"
+#include "sim.h"
+
+#define INLINE
+static 
+long
+sitoptr (si)
+long si;
+{
+  return ((si & 0xff000000) >> 8) | (si & 0xffff);
+}
+
+static
+unsigned short *
+get_page_and_offset (context, where, offset_ptr)
+     sim_state_type *context;
+     sim_phys_addr_type where;
+     int *offset_ptr;
+{
+  /* Is the page allocated ? */
+
+  if (context->memory == 0)
+    {
+      /* Must allocate 16MB in order to run Z8001 programs.  */
+      context->memory  = (unsigned short *)calloc(64*1024*64,4);
+    }
+
+  *offset_ptr = sitoptr(where);
+  return context->memory;
+}
+
+void
+sim_write_byte (context, where, what)
+     sim_state_type *context;
+     sim_phys_addr_type where;
+     int what;
+{
+  unsigned int offset;
+  char *ptr = (char *)get_page_and_offset (context, where, &offset);
+
+  ptr[offset] = what;
+}
+
+void
+sim_write_short (context, where, what)
+     sim_state_type *context;
+     sim_phys_addr_type where;
+     int what;
+{
+  int offset;
+  char *ptr = (char *)get_page_and_offset (context, where, &offset);
+
+  ptr[offset] = what >> 8;
+  ptr[offset + 1] = what;
+}
+
+void
+sim_write_long (context, where, what)
+     sim_state_type *context;
+     sim_phys_addr_type where;
+     int what;
+{
+  int offset;
+  char *ptr = (char *)get_page_and_offset (context, where, &offset);
+
+  ptr[offset] = what >> 24;
+  ptr[offset + 1] = what >> 16;
+  ptr[offset + 3] = what >> 8;
+  ptr[offset + 4] = what;
+}
+
+int
+sim_read_byte (context, where)
+     sim_state_type *context;
+     sim_phys_addr_type where;
+{
+  int offset;
+  char *ptr = (char *)get_page_and_offset (context, where, &offset);
+
+ return ptr[offset];
+}
+
+unsigned
+sim_read_short (context, where)
+     sim_state_type *context;
+     sim_phys_addr_type where;
+{
+  int what;
+  int offset;
+
+  char *ptr = (char *)get_page_and_offset (context, where, &offset);
+
+  what = (ptr[offset] << 8) | ptr[offset + 1];
+  return what;
+}
+
+
+