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/* v850 specific, C compiler specific functions.
   Copyright (C) 2000, 2001, 2002, 2003, 2005, 2007, 2009, 2010
   Free Software Foundation, Inc.
   Contributed by Jeff Law (law@cygnus.com).
 
This file is part of GCC.
 
GCC 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 3, or (at your option)
any later version.
 
GCC 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 GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */
 
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "cpplib.h"
#include "tree.h"
#include "c-family/c-pragma.h"
#include "diagnostic-core.h"
#include "ggc.h"
#include "tm_p.h"
 
#ifndef streq
#define streq(a,b) (strcmp (a, b) == 0)
#endif

static int  pop_data_area          (v850_data_area);
static int  push_data_area         (v850_data_area);
static void mark_current_function_as_interrupt (void);

/* Push a data area onto the stack.  */
 
static int
push_data_area (v850_data_area data_area)
{
  data_area_stack_element * elem;
 
  elem = (data_area_stack_element *) xmalloc (sizeof (* elem));
 
  if (elem == NULL)
    return 0;
 
  elem->prev      = data_area_stack;
  elem->data_area = data_area;
 
  data_area_stack = elem;
 
  return 1;
}
 
/* Remove a data area from the stack.  */
 
static int
pop_data_area (v850_data_area data_area)
{
  if (data_area_stack == NULL)
    warning (OPT_Wpragmas, "#pragma GHS endXXXX found without "
	     "previous startXXX");
  else if (data_area != data_area_stack->data_area)
    warning (OPT_Wpragmas, "#pragma GHS endXXX does not match "
	     "previous startXXX");
  else
    {
      data_area_stack_element * elem;
 
      elem = data_area_stack;
      data_area_stack = data_area_stack->prev;
 
      free (elem);
 
      return 1;
    }
 
  return 0;
}
 
/* Set the machine specific 'interrupt' attribute on the current function.  */
 
static void
mark_current_function_as_interrupt (void)
{
  tree name;
 
  if (current_function_decl ==  NULL_TREE)
    {
      warning (0, "cannot set interrupt attribute: no current function");
      return;
    }
 
  name = get_identifier ("interrupt");
 
  if (name == NULL_TREE || TREE_CODE (name) != IDENTIFIER_NODE)
    {
      warning (0, "cannot set interrupt attribute: no such identifier");
      return;
    }
 
  decl_attributes (&current_function_decl,
		   tree_cons (name, NULL_TREE, NULL_TREE), 0);
}
 

/* Support for GHS pragmata.  */
 
void
ghs_pragma_section (cpp_reader * pfile ATTRIBUTE_UNUSED)
{
  int repeat = 0;
 
  /* #pragma ghs section [name = alias [, name = alias [, ...]]] */
  do
    {
      tree x;
      enum cpp_ttype type;
      tree sect_ident;
      const char *sect, *alias;
      enum GHS_section_kind kind;
 
      type = pragma_lex (&x);
 
      if (type == CPP_EOF && !repeat)
	goto reset;
      else if (type == CPP_NAME)
	{
	  sect_ident = x;
	  sect = IDENTIFIER_POINTER (sect_ident);
	}
      else
	goto bad;
      repeat = 0;
 
      if (pragma_lex (&x) != CPP_EQ)
	goto bad;
      if (pragma_lex (&x) != CPP_NAME)
	goto bad;
 
      alias = IDENTIFIER_POINTER (x);
 
      type = pragma_lex (&x);
      if (type == CPP_COMMA)
	repeat = 1;
      else if (type != CPP_EOF)
	warning (OPT_Wpragmas, "junk at end of #pragma ghs section");
 
      if      (streq (sect, "data"))    kind = GHS_SECTION_KIND_DATA;
      else if (streq (sect, "text"))    kind = GHS_SECTION_KIND_TEXT;
      else if (streq (sect, "rodata"))  kind = GHS_SECTION_KIND_RODATA;
      else if (streq (sect, "const"))   kind = GHS_SECTION_KIND_RODATA;
      else if (streq (sect, "rosdata")) kind = GHS_SECTION_KIND_ROSDATA;
      else if (streq (sect, "rozdata")) kind = GHS_SECTION_KIND_ROZDATA;
      else if (streq (sect, "sdata"))   kind = GHS_SECTION_KIND_SDATA;
      else if (streq (sect, "tdata"))   kind = GHS_SECTION_KIND_TDATA;
      else if (streq (sect, "zdata"))   kind = GHS_SECTION_KIND_ZDATA;
      /* According to GHS beta documentation, the following should not be
	 allowed!  */
      else if (streq (sect, "bss"))     kind = GHS_SECTION_KIND_BSS;
      else if (streq (sect, "zbss"))    kind = GHS_SECTION_KIND_ZDATA;
      else
	{
	  warning (0, "unrecognized section name %qE", sect_ident);
	  return;
	}
 
      if (streq (alias, "default"))
	GHS_current_section_names [kind] = NULL;
      else
	GHS_current_section_names [kind] =
	  build_string (strlen (alias) + 1, alias);
    }
  while (repeat);
 
  return;
 
 bad:
  warning (OPT_Wpragmas, "malformed #pragma ghs section");
  return;
 
 reset:
  /* #pragma ghs section \n: Reset all section names back to their defaults.  */
  {
    int i;
 
    for (i = COUNT_OF_GHS_SECTION_KINDS; i--;)
      GHS_current_section_names [i] = NULL;
  }
}
 
void
ghs_pragma_interrupt (cpp_reader * pfile ATTRIBUTE_UNUSED)
{
  tree x;
 
  if (pragma_lex (&x) != CPP_EOF)
    warning (OPT_Wpragmas, "junk at end of #pragma ghs interrupt");
 
  mark_current_function_as_interrupt ();
}
 
void
ghs_pragma_starttda (cpp_reader * pfile ATTRIBUTE_UNUSED)
{
  tree x;
 
  if (pragma_lex (&x) != CPP_EOF)
    warning (OPT_Wpragmas, "junk at end of #pragma ghs starttda");
 
  push_data_area (DATA_AREA_TDA);
}
 
void
ghs_pragma_startsda (cpp_reader * pfile ATTRIBUTE_UNUSED)
{
  tree x;
 
  if (pragma_lex (&x) != CPP_EOF)
    warning (OPT_Wpragmas, "junk at end of #pragma ghs startsda");
 
  push_data_area (DATA_AREA_SDA);
}
 
void
ghs_pragma_startzda (cpp_reader * pfile ATTRIBUTE_UNUSED)
{
  tree x;
 
  if (pragma_lex (&x) != CPP_EOF)
    warning (OPT_Wpragmas, "junk at end of #pragma ghs startzda");
 
  push_data_area (DATA_AREA_ZDA);
}
 
void
ghs_pragma_endtda (cpp_reader * pfile ATTRIBUTE_UNUSED)
{
  tree x;
 
  if (pragma_lex (&x) != CPP_EOF)
    warning (OPT_Wpragmas, "junk at end of #pragma ghs endtda");
 
  pop_data_area (DATA_AREA_TDA);
}
 
void
ghs_pragma_endsda (cpp_reader * pfile ATTRIBUTE_UNUSED)
{
  tree x;
 
  if (pragma_lex (&x) != CPP_EOF)
    warning (OPT_Wpragmas, "junk at end of #pragma ghs endsda");
 
  pop_data_area (DATA_AREA_SDA);
}
 
void
ghs_pragma_endzda (cpp_reader * pfile ATTRIBUTE_UNUSED)
{
  tree x;
 
  if (pragma_lex (&x) != CPP_EOF)
    warning (OPT_Wpragmas, "junk at end of #pragma ghs endzda");
 
  pop_data_area (DATA_AREA_ZDA);
}