Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 571 insertions, 0 deletions

diff --git a/sim/common/hw-base.c b/sim/common/hw-base.c
new file mode 100644
index 0000000..a13ac64
--- /dev/null
+++ b/sim/common/hw-base.c
@@ -0,0 +1,571 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1996, 1998, 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.
+ 
+    */
+
+
+#include "hw-main.h"
+#include "hw-base.h"
+
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+
+#if HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#include <ctype.h>
+
+#include "hw-config.h"
+
+struct hw_base_data {
+  int finished_p;
+  const struct hw_descriptor *descriptor;
+  hw_delete_callback *to_delete;
+};
+
+static int
+generic_hw_unit_decode (struct hw *bus,
+			const char *unit,
+			hw_unit *phys)
+{
+  memset (phys, 0, sizeof (*phys));
+  if (unit == NULL)
+    return 0;
+  else
+    {
+      int nr_cells = 0;
+      const int max_nr_cells = hw_unit_nr_address_cells (bus);
+      while (1)
+	{
+	  char *end = NULL;
+	  unsigned long val;
+	  val = strtoul (unit, &end, 0);
+	  /* parse error? */
+	  if (unit == end)
+	    return -1;
+	  /* two many cells? */
+	  if (nr_cells >= max_nr_cells)
+	    return -1;
+	  /* save it */
+	  phys->cells[nr_cells] = val;
+	  nr_cells++;
+	  unit = end;
+	  /* more to follow? */
+	  if (isspace (*unit) || *unit == '\0')
+	    break;
+	  if (*unit != ',')
+	    return -1;
+	  unit++;
+	}
+      if (nr_cells < max_nr_cells) {
+	/* shift everything to correct position */
+	int i;
+	for (i = 1; i <= nr_cells; i++)
+	  phys->cells[max_nr_cells - i] = phys->cells[nr_cells - i];
+	for (i = 0; i < (max_nr_cells - nr_cells); i++)
+	  phys->cells[i] = 0;
+      }
+      phys->nr_cells = max_nr_cells;
+      return max_nr_cells;
+  }
+}
+
+static int
+generic_hw_unit_encode (struct hw *bus,
+			const hw_unit *phys,
+			char *buf,
+			int sizeof_buf)
+{
+  int i;
+  int len;
+  char *pos = buf;
+  /* skip leading zero's */
+  for (i = 0; i < phys->nr_cells; i++)
+    {
+      if (phys->cells[i] != 0)
+	break;
+    }
+  /* don't output anything if empty */
+  if (phys->nr_cells == 0)
+    {
+      strcpy(pos, "");
+      len = 0;
+    }
+  else if (i == phys->nr_cells)
+    {
+      /* all zero */
+      strcpy(pos, "0");
+      len = 1;
+    }
+  else
+    {
+      for (; i < phys->nr_cells; i++)
+	{
+	  if (pos != buf) {
+	    strcat(pos, ",");
+	    pos = strchr(pos, '\0');
+	  }
+	  if (phys->cells[i] < 10)
+	    sprintf (pos, "%ld", (unsigned long)phys->cells[i]);
+	  else
+	    sprintf (pos, "0x%lx", (unsigned long)phys->cells[i]);
+	  pos = strchr(pos, '\0');
+	}
+      len = pos - buf;
+    }
+  if (len >= sizeof_buf)
+    hw_abort (NULL, "generic_unit_encode - buffer overflow\n");
+  return len;
+}
+
+static int
+generic_hw_unit_address_to_attach_address (struct hw *me,
+					   const hw_unit *address,
+					   int *attach_space,
+					   unsigned_word *attach_address,
+					   struct hw *client)
+{
+  int i;
+  for (i = 0; i < address->nr_cells - 2; i++)
+    {
+      if (address->cells[i] != 0)
+	hw_abort (me, "Only 32bit addresses supported");
+    }
+  if (address->nr_cells >= 2)
+    *attach_space = address->cells[address->nr_cells - 2];
+  else
+    *attach_space = 0;
+  *attach_address = address->cells[address->nr_cells - 1];
+  return 1;
+}
+
+static int
+generic_hw_unit_size_to_attach_size (struct hw *me,
+				     const hw_unit *size,
+				     unsigned *nr_bytes,
+				     struct hw *client)
+{
+  int i;
+  for (i = 0; i < size->nr_cells - 1; i++)
+    {
+      if (size->cells[i] != 0)
+	hw_abort (me, "Only 32bit sizes supported");
+    }
+  *nr_bytes = size->cells[0];
+  return *nr_bytes;
+}
+
+
+/* ignore/passthrough versions of each function */
+
+static void
+passthrough_hw_attach_address (struct hw *me,
+			       int level,
+			       int space,
+			       address_word addr,
+			       address_word nr_bytes,
+			       struct hw *client) /*callback/default*/
+{
+  if (hw_parent (me) == NULL)
+    hw_abort (client, "hw_attach_address: no parent attach method");
+  hw_attach_address (hw_parent (me), level,
+		     space, addr, nr_bytes,
+		     client);
+}
+
+static void
+passthrough_hw_detach_address (struct hw *me,
+			       int level,
+			       int space,
+			       address_word addr,
+			       address_word nr_bytes,
+			       struct hw *client) /*callback/default*/
+{
+  if (hw_parent (me) == NULL)
+    hw_abort (client, "hw_attach_address: no parent attach method");
+  hw_detach_address (hw_parent (me), level,
+		     space, addr, nr_bytes,
+		     client);
+}
+
+static unsigned
+panic_hw_io_read_buffer (struct hw *me,
+			 void *dest,
+			 int space,
+			 unsigned_word addr,
+			 unsigned nr_bytes)
+{
+  hw_abort (me, "no io-read method");
+  return 0;
+}
+
+static unsigned
+panic_hw_io_write_buffer (struct hw *me,
+			  const void *source,
+			  int space,
+			  unsigned_word addr,
+			  unsigned nr_bytes)
+{
+  hw_abort (me, "no io-write method");
+  return 0;
+}
+
+static unsigned
+passthrough_hw_dma_read_buffer (struct hw *me,
+				void *dest,
+				int space,
+				unsigned_word addr,
+				unsigned nr_bytes)
+{
+  if (hw_parent (me) == NULL)
+    hw_abort (me, "no parent dma-read method");
+  return hw_dma_read_buffer (hw_parent (me), dest,
+			     space, addr, nr_bytes);
+}
+
+static unsigned
+passthrough_hw_dma_write_buffer (struct hw *me,
+				 const void *source,
+				 int space,
+				 unsigned_word addr,
+				 unsigned nr_bytes,
+				 int violate_read_only_section)
+{
+  if (hw_parent (me) == NULL)
+    hw_abort (me, "no parent dma-write method");
+  return hw_dma_write_buffer (hw_parent (me), source,
+			      space, addr,
+			      nr_bytes,
+			      violate_read_only_section);
+}
+
+static void
+ignore_hw_delete (struct hw *me)
+{
+  /* NOP */
+}
+
+
+
+
+static const char *
+full_name_of_hw (struct hw *leaf,
+		 char *buf,
+		 unsigned sizeof_buf)
+{
+  /* get a buffer */
+  char full_name[1024];
+  if (buf == (char*)0)
+    {
+      buf = full_name;
+      sizeof_buf = sizeof (full_name);
+    }
+
+  /* use head recursion to construct the path */
+
+  if (hw_parent (leaf) == NULL)
+    /* root */
+    {
+      if (sizeof_buf < 1)
+	hw_abort (leaf, "buffer overflow");
+      *buf = '\0';
+    }
+  else
+    /* sub node */
+    {
+      char unit[1024];
+      full_name_of_hw (hw_parent (leaf), buf, sizeof_buf);
+      if (hw_unit_encode (hw_parent (leaf),
+			  hw_unit_address (leaf),
+			  unit + 1,
+			  sizeof (unit) - 1)
+	  > 0)
+	unit[0] = '@';
+      else
+	unit[0] = '\0';
+      if (strlen (buf) + strlen ("/") + strlen (hw_name (leaf)) + strlen (unit)
+	  >= sizeof_buf)
+	hw_abort (leaf, "buffer overflow");
+      strcat (buf, "/");
+      strcat (buf, hw_name (leaf));
+      strcat (buf, unit);
+    }
+  
+  /* return it usefully */
+  if (buf == full_name)
+    buf = hw_strdup (leaf, full_name);
+  return buf;
+}
+
+struct hw *
+hw_create (struct sim_state *sd,
+	   struct hw *parent,
+	   const char *family,
+	   const char *name,
+	   const char *unit,
+	   const char *args)
+{
+ /* NOTE: HW must be allocated using ZALLOC, others use HW_ZALLOC */
+  struct hw *hw = ZALLOC (struct hw);
+
+  /* our identity */
+  hw->family_of_hw = hw_strdup (hw, family);
+  hw->name_of_hw = hw_strdup (hw, name);
+  hw->args_of_hw = hw_strdup (hw, args);
+
+  /* a hook into the system */
+  if (sd != NULL)
+    hw->system_of_hw = sd;
+  else if (parent != NULL)
+    hw->system_of_hw = hw_system (parent);
+  else
+    hw_abort (parent, "No system found");
+
+  /* in a tree */
+  if (parent != NULL)
+    {
+      struct hw **sibling = &parent->child_of_hw;
+      while ((*sibling) != NULL)
+	sibling = &(*sibling)->sibling_of_hw;
+      *sibling = hw;
+      hw->parent_of_hw = parent;
+    }
+
+  /* top of tree */
+  if (parent != NULL)
+    {
+      struct hw *root = parent;
+      while (root->parent_of_hw != NULL)
+	root = root->parent_of_hw;
+      hw->root_of_hw = root;
+    }
+  
+  /* a unique identifier for the device on the parents bus */
+  if (parent != NULL)
+    {
+      hw_unit_decode (parent, unit, &hw->unit_address_of_hw);
+    }
+
+  /* Determine our path */
+  if (parent != NULL)
+    hw->path_of_hw = full_name_of_hw (hw, NULL, 0);
+  else
+    hw->path_of_hw = "/";
+
+  /* create our base type */
+  hw->base_of_hw = HW_ZALLOC (hw, struct hw_base_data);
+  hw->base_of_hw->finished_p = 0;
+
+  /* our callbacks */
+  set_hw_io_read_buffer (hw, panic_hw_io_read_buffer);
+  set_hw_io_write_buffer (hw, panic_hw_io_write_buffer);
+  set_hw_dma_read_buffer (hw, passthrough_hw_dma_read_buffer);
+  set_hw_dma_write_buffer (hw, passthrough_hw_dma_write_buffer);
+  set_hw_unit_decode (hw, generic_hw_unit_decode);
+  set_hw_unit_encode (hw, generic_hw_unit_encode);
+  set_hw_unit_address_to_attach_address (hw, generic_hw_unit_address_to_attach_address);
+  set_hw_unit_size_to_attach_size (hw, generic_hw_unit_size_to_attach_size);
+  set_hw_attach_address (hw, passthrough_hw_attach_address);
+  set_hw_detach_address (hw, passthrough_hw_detach_address);
+  set_hw_delete (hw, ignore_hw_delete);
+
+  /* locate a descriptor */
+  {
+    const struct hw_descriptor **table;
+    for (table = hw_descriptors;
+	 *table != NULL;
+	 table++)
+      {
+	const struct hw_descriptor *entry;
+	for (entry = *table;
+	     entry->family != NULL;
+	     entry++)
+	  {
+	    if (strcmp (family, entry->family) == 0)
+	      {
+		hw->base_of_hw->descriptor = entry;
+		break;
+	      }
+	  }
+      }
+    if (hw->base_of_hw->descriptor == NULL)
+      {
+	hw_abort (parent, "Unknown device `%s'", family);
+      }
+  }
+
+  /* Attach dummy ports */
+  create_hw_alloc_data (hw);
+  create_hw_property_data (hw);
+  create_hw_port_data (hw);
+  create_hw_event_data (hw);
+  create_hw_handle_data (hw);
+  create_hw_instance_data (hw);
+  
+  return hw;
+}
+
+
+int
+hw_finished_p (struct hw *me)
+{
+  return (me->base_of_hw->finished_p);
+}
+
+void
+hw_finish (struct hw *me)
+{
+  if (hw_finished_p (me))
+    hw_abort (me, "Attempt to finish finished device");
+
+  /* Fill in the (hopefully) defined address/size cells values */
+  if (hw_find_property (me, "#address-cells") != NULL)
+    me->nr_address_cells_of_hw_unit =
+      hw_find_integer_property (me, "#address-cells");
+  else
+    me->nr_address_cells_of_hw_unit = 2;
+  if (hw_find_property (me, "#size-cells") != NULL)
+    me->nr_size_cells_of_hw_unit =
+      hw_find_integer_property (me, "#size-cells");
+  else
+    me->nr_size_cells_of_hw_unit = 1;
+
+  /* Fill in the (hopefully) defined trace variable */
+  if (hw_find_property (me, "trace?") != NULL)
+    me->trace_of_hw_p = hw_find_boolean_property (me, "trace?");
+  /* allow global variable to define default tracing */
+  else if (! hw_trace_p (me)
+	   && hw_find_property (hw_root (me), "global-trace?") != NULL
+	   && hw_find_boolean_property (hw_root (me), "global-trace?"))
+    me->trace_of_hw_p = 1;
+    
+
+  /* Allow the real device to override any methods */
+  me->base_of_hw->descriptor->to_finish (me);
+  me->base_of_hw->finished_p = 1;
+}
+
+
+void
+hw_delete (struct hw *me)
+{
+  /* give the object a chance to tidy up */
+  me->base_of_hw->to_delete (me);
+
+  delete_hw_instance_data (me);
+  delete_hw_handle_data (me);
+  delete_hw_event_data (me);
+  delete_hw_port_data (me);
+  delete_hw_property_data (me);
+
+  /* now unlink us from the tree */
+  if (hw_parent (me))
+    {
+      struct hw **sibling = &hw_parent (me)->child_of_hw;
+      while (*sibling != NULL)
+	{
+	  if (*sibling == me)
+	    {
+	      *sibling = me->sibling_of_hw;
+	      me->sibling_of_hw = NULL;
+	      me->parent_of_hw = NULL;
+	      break;
+	    }
+	}
+    }
+
+  /* some sanity checks */
+  if (hw_child (me) != NULL)
+    {
+      hw_abort (me, "attempt to delete device with children");
+    }
+  if (hw_sibling (me) != NULL)
+    {
+      hw_abort (me, "attempt to delete device with siblings");
+    }
+
+  /* blow away all memory belonging to the device */
+  delete_hw_alloc_data (me);
+
+  /* finally */
+  zfree (me->base_of_hw);
+  zfree (me);
+}
+
+
+/* Go through the devices various reg properties for those that
+   specify attach addresses */
+
+
+void
+do_hw_attach_regs (struct hw *hw)
+{
+  static const char *(reg_property_names[]) = {
+    "attach-addresses",
+    "assigned-addresses",
+    "reg",
+    "alternate-reg" ,
+    NULL
+  };
+  const char **reg_property_name;
+  int nr_valid_reg_properties = 0;
+  for (reg_property_name = reg_property_names;
+       *reg_property_name != NULL;
+       reg_property_name++)
+    {
+      if (hw_find_property (hw, *reg_property_name) != NULL)
+	{
+	  reg_property_spec reg;
+	  int reg_entry;
+	  for (reg_entry = 0;
+	       hw_find_reg_array_property (hw, *reg_property_name, reg_entry,
+					   &reg);
+	       reg_entry++)
+	    {
+	      unsigned_word attach_address;
+	      int attach_space;
+	      unsigned attach_size;
+	      if (!hw_unit_address_to_attach_address (hw_parent (hw),
+						      &reg.address,
+						      &attach_space,
+						      &attach_address,
+						      hw))
+		continue;
+	      if (!hw_unit_size_to_attach_size (hw_parent (hw),
+						&reg.size,
+						&attach_size, hw))
+		continue;
+	      hw_attach_address (hw_parent (hw),
+				 0,
+				 attach_space, attach_address, attach_size,
+				 hw);
+	      nr_valid_reg_properties++;
+	    }
+	  /* if first option matches don't try for any others */
+	  if (reg_property_name == reg_property_names)
+	    break;
+	}
+    }
+}