1 files changed, 343 insertions, 0 deletions

diff --git a/sim/ppc/emul_generic.c b/sim/ppc/emul_generic.c
new file mode 100644
index 0000000..1d43175
--- /dev/null
+++ b/sim/ppc/emul_generic.c
@@ -0,0 +1,343 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
+
+    This program 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 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+    */
+
+
+#ifndef _EMUL_GENERIC_C_
+#define _EMUL_GENERIC_C_
+
+#include "emul_generic.h"
+
+#ifndef STATIC_INLINE_EMUL_GENERIC
+#define STATIC_INLINE_EMUL_GENERIC STATIC_INLINE
+#endif
+
+
+STATIC_INLINE_EMUL_GENERIC void
+emul_syscall_enter(emul_syscall *emul,
+		   int call,
+		   int arg0,
+		   cpu *processor,
+		   unsigned_word cia)
+{
+  printf_filtered("%d:0x%lx:%s(",
+		  cpu_nr(processor) + 1,
+		  (long)cia,
+		  emul->syscall_descriptor[call].name);
+}
+
+
+STATIC_INLINE_EMUL_GENERIC void
+emul_syscall_exit(emul_syscall *emul,
+		  int call,
+		  int arg0,
+		  cpu *processor,
+		  unsigned_word cia)
+{
+  int status = cpu_registers(processor)->gpr[3];
+  int error = cpu_registers(processor)->gpr[0];
+  printf_filtered(")=%d", status);
+  if (error > 0 && error < emul->nr_error_names)
+    printf_filtered("[%s]", emul->error_names[error]);
+  printf_filtered("\n");
+}
+
+
+INLINE_EMUL_GENERIC unsigned64
+emul_read_gpr64(cpu *processor,
+		int g)
+{
+  unsigned32 hi;
+  unsigned32 lo;
+  if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
+    hi = cpu_registers(processor)->gpr[g];
+    lo = cpu_registers(processor)->gpr[g+1];
+  }
+  else {
+    lo = cpu_registers(processor)->gpr[g];
+    hi = cpu_registers(processor)->gpr[g+1];
+  }
+  return (INSERTED64(hi, 0, 31) | INSERTED64(lo, 32, 63));
+}
+
+
+INLINE_EMUL_GENERIC void
+emul_write_gpr64(cpu *processor,
+		 int g,
+		 unsigned64 val)
+{
+  unsigned32 hi = EXTRACTED64(val, 0, 31);
+  unsigned32 lo = EXTRACTED64(val, 32, 63);
+  if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
+    cpu_registers(processor)->gpr[g] = hi;
+    cpu_registers(processor)->gpr[g+1] = lo;
+  }
+  else {
+    cpu_registers(processor)->gpr[g] = lo;
+    cpu_registers(processor)->gpr[g+1] = hi;
+  }
+}
+
+
+INLINE_EMUL_GENERIC char *
+emul_read_string(char *dest,
+		 unsigned_word addr,
+		 unsigned nr_bytes,
+		 cpu *processor,
+		 unsigned_word cia)
+{
+  unsigned nr_moved = 0;
+  if (addr == 0)
+    return NULL;
+  while (1) {
+    dest[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
+					addr + nr_moved,
+					processor, cia);
+    if (dest[nr_moved] == '\0' || nr_moved >= nr_bytes)
+      break;
+    nr_moved++;
+  }
+  dest[nr_moved] = '\0';
+  return dest;
+}
+
+
+INLINE_EMUL_GENERIC void
+emul_write_status(cpu *processor,
+		  int status,
+		  int errno)
+{
+  if (status == -1 && errno != 0) {
+    cpu_registers(processor)->gpr[3] = errno;
+    CR_SET(0, cr_i_summary_overflow);
+  }
+  else {
+    cpu_registers(processor)->gpr[3] = status;
+    CR_SET(0, 0);
+  }
+}
+
+
+INLINE_EMUL_GENERIC void
+emul_write2_status(cpu *processor,
+		   int status1,
+		   int status2,
+		   int errno)
+{
+  if (status1 == -1 && errno != 0) {
+    cpu_registers(processor)->gpr[3] = errno;
+    CR_SET(0, cr_i_summary_overflow);
+  }
+  else {
+    cpu_registers(processor)->gpr[3] = status1;
+    cpu_registers(processor)->gpr[4] = status2;
+    CR_SET(0, 0);
+  }
+}
+
+
+INLINE_EMUL_GENERIC unsigned_word
+emul_read_word(unsigned_word addr,
+	       cpu *processor,
+	       unsigned_word cia)
+{
+  return vm_data_map_read_word(cpu_data_map(processor),
+			       addr,
+			       processor, cia);
+}
+
+
+INLINE_EMUL_GENERIC void
+emul_write_word(unsigned_word addr,
+		unsigned_word buf,
+		cpu *processor,
+		unsigned_word cia)
+{
+  vm_data_map_write_word(cpu_data_map(processor),
+			 addr,
+			 buf,
+			 processor, cia);
+}
+
+
+INLINE_EMUL_GENERIC void
+emul_write_buffer(const void *source,
+		  unsigned_word addr,
+		  unsigned nr_bytes,
+		  cpu *processor,
+		  unsigned_word cia)
+{
+  int nr_moved;
+  for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
+    vm_data_map_write_1(cpu_data_map(processor),
+			addr + nr_moved,
+			((const char*)source)[nr_moved],
+			processor, cia);
+  }
+}
+
+
+INLINE_EMUL_GENERIC void
+emul_read_buffer(void *dest,
+		 unsigned_word addr,
+		 unsigned nr_bytes,
+		 cpu *processor,
+		 unsigned_word cia)
+{
+  int nr_moved;
+  for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
+    ((char*)dest)[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
+						 addr + nr_moved,
+						 processor, cia);
+  }
+}
+
+
+INLINE_EMUL_GENERIC void
+emul_do_system_call(os_emul_data *emul_data,
+		    emul_syscall *emul,
+		    unsigned call,
+		    const int arg0,
+		    cpu *processor,
+		    unsigned_word cia)
+{
+  emul_syscall_handler *handler = NULL;
+  if (call >= emul->nr_system_calls)
+    error("do_call() os_emul call %d out-of-range\n", call);
+
+  handler = emul->syscall_descriptor[call].handler;
+  if (handler == NULL) {
+    if (emul->syscall_descriptor[call].name) {
+      error("do_call() unimplemented call %s\n", emul->syscall_descriptor[call].name);
+    } else {
+      error("do_call() unimplemented call %d\n", call);
+    }
+  }
+
+  if (WITH_TRACE && ppc_trace[trace_os_emul])
+    emul_syscall_enter(emul, call, arg0, processor, cia);
+
+  cpu_registers(processor)->gpr[0] = 0; /* default success */
+  handler(emul_data, call, arg0, processor, cia);
+
+  if (WITH_TRACE && ppc_trace[trace_os_emul])
+    emul_syscall_exit(emul, call, arg0, processor, cia);
+}
+
+
+/* default size for the first bank of memory */
+
+#ifndef OEA_MEMORY_SIZE
+#define OEA_MEMORY_SIZE 0x100000
+#endif
+
+
+/* Add options to the device tree */
+
+INLINE_EMUL_GENERIC void
+emul_add_tree_options(device *tree,
+		      bfd *image,
+		      const char *emul,
+		      const char *env,
+		      int oea_interrupt_prefix)
+{
+  int little_endian = 0;
+
+  /* sort out little endian */
+  if (tree_find_property(tree, "/options/little-endian?"))
+    little_endian = tree_find_boolean_property(tree, "/options/little-endian?");
+  else {
+#ifdef bfd_little_endian	/* new bfd */
+    little_endian = (image != NULL && bfd_little_endian(image));
+#else
+    little_endian = (image != NULL &&
+		     !image->xvec->byteorder_big_p);
+#endif
+    tree_parse(tree, "/options/little-endian? %s",
+	       little_endian ? "true" : "false");
+  }
+
+  /* misc other stuff */
+  tree_parse(tree, "/openprom/options/oea-memory-size 0x%x",
+	     OEA_MEMORY_SIZE);
+  tree_parse(tree, "/openprom/options/oea-interrupt-prefix %d",
+	     oea_interrupt_prefix);
+  tree_parse(tree, "/openprom/options/smp 1");
+  tree_parse(tree, "/openprom/options/env %s", env);
+  tree_parse(tree, "/openprom/options/os-emul %s", emul);
+  tree_parse(tree, "/openprom/options/strict-alignment? %s",
+	     (WITH_ALIGNMENT == STRICT_ALIGNMENT)
+	     ? "true" : "false");
+  tree_parse(tree, "/openprom/options/floating-point? %s",
+	     WITH_FLOATING_POINT ? "true" : "false");
+  tree_parse(tree, "/openprom/options/use-stdio? %s",
+	     ((WITH_STDIO == DO_USE_STDIO
+	       || WITH_STDIO == 0)
+	      ? "true" : "false"));
+  tree_parse(tree, "/openprom/options/model \"%s",
+	     model_name[WITH_DEFAULT_MODEL]);
+  tree_parse(tree, "/openprom/options/model-issue %d",
+	     MODEL_ISSUE_IGNORE);
+
+  /* useful options */
+}
+
+INLINE_EMUL_GENERIC void
+emul_add_tree_hardware(device *root)
+{
+  int i;
+  int nr_cpus = tree_find_integer_property(root, "/openprom/options/smp");
+
+  /* sanity check the number of processors */
+  if (nr_cpus > MAX_NR_PROCESSORS)
+    error("Specified number of processors (%d) exceeds the number configured (%d).\n",
+	  nr_cpus, MAX_NR_PROCESSORS);
+
+  /* set the number of address cells (1 or 2) */
+  tree_parse(root, "#address-cells %d", WITH_TARGET_WORD_BITSIZE / 32);
+
+  /* add some memory */
+  if (tree_find_device(root, "/memory") == NULL) {
+    unsigned_word memory_size =
+      tree_find_integer_property(root, "/openprom/options/oea-memory-size");
+    const unsigned_word avail_start = 0x3000;
+    tree_parse(root, "/memory@0/reg 0x0 0x%lx",
+	       (unsigned long)memory_size);
+    /* reserve the first 0x3000 for the PowerPC interrupt table */
+    tree_parse(root, "/memory@0/available 0x%lx  0x%lx",
+	       (unsigned long)avail_start,
+	       (unsigned long)memory_size - avail_start);
+  }
+
+  /* our processors */
+  for (i = 0; i < nr_cpus; i++) {
+    tree_parse(root, "/cpus/cpu@%d/cpu-nr %d", i, i);
+  }
+
+  /* the debugging pal - hide it in the openprom and don't attach it
+     to any bus */
+  tree_parse(root, "/openprom/pal");
+
+  /* chosen etc */
+  tree_parse(root, "/chosen/stdin */openprom/pal");
+  tree_parse(root, "/chosen/stdout !/chosen/stdin");
+  tree_parse(root, "/chosen/memory */memory");
+}
+
+#endif /* _EMUL_GENERIC_C_ */