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/* PRU target specific pragmas
Copyright (C) 2015-2021 Free Software Foundation, Inc.
Contributed by Dimitar Dimitrov <dimitar@dinux.eu>
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/>. */
#define IN_TARGET_CODE 1
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "alias.h"
#include "symtab.h"
#include "tree.h"
#include "c-family/c-pragma.h"
#include "c-family/c-common.h"
#include "diagnostic-core.h"
#include "cpplib.h"
#include "pru-protos.h"
/* Implements the "pragma CTABLE_ENTRY" pragma. This pragma takes a
CTABLE index and an address, and instructs the compiler that
LBCO/SBCO can be used on that base address.
WARNING: Only immediate constant addresses are currently supported. */
static void
pru_pragma_ctable_entry (cpp_reader * reader ATTRIBUTE_UNUSED)
{
tree ctable_index, base_addr;
enum cpp_ttype type;
type = pragma_lex (&ctable_index);
if (type == CPP_NUMBER && tree_fits_uhwi_p (ctable_index))
{
type = pragma_lex (&base_addr);
if (type == CPP_NUMBER && tree_fits_uhwi_p (base_addr))
{
unsigned HOST_WIDE_INT i = tree_to_uhwi (ctable_index);
unsigned HOST_WIDE_INT base = tree_to_uhwi (base_addr);
type = pragma_lex (&base_addr);
if (type != CPP_EOF)
error ("junk at end of %<#pragma CTABLE_ENTRY%>");
else if (i >= ARRAY_SIZE (pru_ctable))
error ("%<CTABLE_ENTRY%> index %" HOST_WIDE_INT_PRINT "d"
" is not valid", i);
else if (pru_ctable[i].valid && pru_ctable[i].base != base)
error ("redefinition of %<CTABLE_ENTRY "
"%" HOST_WIDE_INT_PRINT "d%>", i);
else
{
if (base & 0xff)
warning (0, "%<CTABLE_ENTRY%> base address is not "
"a multiple of 256");
pru_ctable[i].base = base;
pru_ctable[i].valid = true;
}
return;
}
}
error ("malformed %<#pragma CTABLE_ENTRY%> variable address");
}
/* Implements REGISTER_TARGET_PRAGMAS. */
void
pru_register_pragmas (void)
{
c_register_pragma (NULL, "ctable_entry", pru_pragma_ctable_entry);
c_register_pragma (NULL, "CTABLE_ENTRY", pru_pragma_ctable_entry);
c_register_addr_space ("__regio_symbol", ADDR_SPACE_REGIO);
}
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