/* Copyright (C) 1998-2016 Free Software Foundation, Inc.
Contributed by Joern Rennecke
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
. */
#include
#include
#include
#include "config.h"
#define IN_GEN_AVR_MMCU_TEXI
#include "avr-devices.c"
// Get rid of "defaults.h". We just need tm.h for `WITH_AVRLIBC' and
// and `WITH_RTEMS'. */
#define GCC_DEFAULTS_H
#include "tm.h"
// Mimic the include order as specified in config.gcc::tm_file.
#include "specs.h"
#if defined (WITH_AVRLIBC)
#include "avrlibc.h"
#endif
#if defined (WITH_RTEMS)
#include "../rtems.h"
#include "rtems.h"
#endif
#define SPECFILE_DOC_URL \
"https://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html"
#define SPECFILE_USAGE_URL \
"https://gcc.gnu.org/gcc-5/changes.html"
/* Return true iff STR starts with PREFIX. */
static bool
str_prefix_p (const char *str, const char *prefix)
{
return 0 == strncmp (str, prefix, strlen (prefix));
}
static const char header[] =
"#\n"
"# Generated by : ./gcc/config/avr/gen-avr-mmcu-specs.c\n"
"# Generated from : ./gcc/config/gcc.c\n"
"# ./gcc/config/avr/specs.h\n"
#if defined (WITH_RTEMS)
"# ./gcc/config/rtems.h\n"
"# ./gcc/config/avr/rtems.h\n"
#endif
#if defined (WITH_AVRLIBC)
"# ./gcc/config/avr/avrlibc.h\n"
#endif
"# Used by : avr-gcc compiler driver\n"
"# Used for : building command options for sub-processes\n"
"#\n"
"# See <" SPECFILE_DOC_URL ">\n"
"# for a documentation of spec files.\n"
"\n";
static const char help_copy_paste[] =
"# If you intend to use an existing device specs file as a starting point\n"
"# for a new device spec file, make sure you are copying from a specs\n"
"# file for a device from the same core architecture and SP width.\n"
"# See <" SPECFILE_USAGE_URL "> for a description\n"
"# of how to use such own spec files.\n";
#if defined (WITH_AVRLIBC)
static const char help_dev_lib_name[] =
"# AVR-LibC's avr/io.h uses the device specifying macro to determine\n"
"# the name of the device header. For example, -mmcu=atmega8a triggers\n"
"# the definition of __AVR_ATmega8A__ and avr/io.h includes the device\n"
"# header 'iom8a.h' by means of:\n"
"#\n"
"# ...\n"
"# #elif defined (__AVR_ATmega8A__)\n"
"# # include \n"
"# #elif ...\n"
"# \n"
"# If no device macro is defined, AVR-LibC uses __AVR_DEV_LIB_NAME__\n"
"# as fallback to determine the name of the device header as\n"
"#\n"
"# \"avr/io\" + __AVR_DEV_LIB_NAME__ + \".h\"\n"
"#\n"
"# If you provide your own specs file for a device not yet known to\n"
"# AVR-LibC, you can now define the hook macro __AVR_DEV_LIB_NAME__\n"
"# as needed so that\n"
"#\n"
"# #include \n"
"#\n"
"# will include the desired device header. For ATmega8A the supplement\n"
"# to *cpp would read\n"
"#\n"
"# -D__AVR_DEV_LIB_NAME__=m8a\n"
"\n";
#endif // WITH_AVRLIBC
static void
print_mcu (const avr_mcu_t *mcu)
{
const char *sp8_spec;
const avr_mcu_t *arch_mcu;
const avr_arch_t *arch;
enum avr_arch_id arch_id = mcu->arch_id;
for (arch_mcu = mcu; arch_mcu->macro; )
arch_mcu--;
if (arch_mcu->arch_id != arch_id)
exit (EXIT_FAILURE);
arch = &avr_arch_types[arch_id];
char name[100];
if (snprintf (name, sizeof name, "specs-%s", mcu->name) >= (int) sizeof name)
exit (EXIT_FAILURE);
FILE *f = fopen (name ,"w");
bool errata_skip = 0 != (mcu->dev_attribute & AVR_ERRATA_SKIP);
bool rmw = 0 != (mcu->dev_attribute & AVR_ISA_RMW);
bool sp8 = 0 != (mcu->dev_attribute & AVR_SHORT_SP);
bool is_arch = NULL == mcu->macro;
bool is_device = ! is_arch;
if (is_arch
&& (ARCH_AVR2 == arch_id
|| ARCH_AVR25 == arch_id))
{
// Leave "avr2" and "avr25" alone. These two architectures are
// the only ones that mix devices with 8-bit SP and 16-bit SP.
sp8_spec = "";
}
else
{
sp8_spec = sp8 ? "-msp8" :"%name);
else
fprintf (f, "device %s (core %s, %d-bit SP)\n",
mcu->name, arch->name, sp8 ? 8 : 16);
fprintf (f, "%s\n", header);
if (is_device)
fprintf (f, "%s\n", help_copy_paste);
#if defined (WITH_AVRLIBC)
// AVR-LibC specific. See avrlibc.h for the specs using them as subspecs.
if (is_device)
{
fprintf (f, "*avrlibc_startfile:\n");
fprintf (f, "\tcrt%s.o%%s", mcu->name);
fprintf (f, "\n\n");
fprintf (f, "*avrlibc_devicelib:\n");
fprintf (f, "\t%%{!nodevicelib:-l%s}", mcu->name);
fprintf (f, "\n\n");
}
#endif // WITH_AVRLIBC
// avr-gcc specific specs for the compilation / the compiler proper.
fprintf (f, "*cc1_n_flash:\n"
"\t%%{!mn-flash=*:-mn-flash=%d}\n\n", mcu->n_flash);
fprintf (f, "*cc1_rmw:\n%s\n\n", rmw
? "\t%{!mno-rmw: -mrmw}"
: "\t%{mrmw}");
fprintf (f, "*cc1_errata_skip:\n%s\n\n", errata_skip
? "\t%{!mno-skip-bug: -mskip-bug}"
: "\t%{!mskip-bug: -mno-skip-bug}");
// avr-gcc specific specs for assembling / the assembler.
fprintf (f, "*asm_arch:\n\t-mmcu=%s\n\n", arch->name);
#ifdef HAVE_AS_AVR_MLINK_RELAX_OPTION
fprintf (f, "*asm_relax:\n\t%s\n\n", ASM_RELAX_SPEC);
#endif // have avr-as --mlink-relax
#ifdef HAVE_AS_AVR_MRMW_OPTION
fprintf (f, "*asm_rmw:\n%s\n\n", rmw
? "\t%{!mno-rmw: -mrmw}"
: "\t%{mrmw}");
#endif // have avr-as -mrmw
fprintf (f, "*asm_errata_skip:\n%s\n\n", errata_skip
? "\t%{mno-skip-bug}"
: "\t%{!mskip-bug: -mno-skip-bug}");
// avr-specific specs for linking / the linker.
int wrap_k =
str_prefix_p (mcu->name, "at90usb8") ? 8
: str_prefix_p (mcu->name, "atmega16") ? 16
: (str_prefix_p (mcu->name, "atmega32")
|| str_prefix_p (mcu->name, "at90can32")) ? 32
: (str_prefix_p (mcu->name, "atmega64")
|| str_prefix_p (mcu->name, "at90can64")
|| str_prefix_p (mcu->name, "at90usb64")) ? 64
: 0;
fprintf (f, "*link_pmem_wrap:\n");
if (wrap_k)
fprintf (f, "\t%%{mpmem-wrap-around: --pmem-wrap-around=%dk}", wrap_k);
fprintf (f, "\n\n");
fprintf (f, "*link_relax:\n\t%s\n\n", LINK_RELAX_SPEC);
fprintf (f, "*link_arch:\n\t%s\n\n", LINK_ARCH_SPEC);
if (is_device)
{
fprintf (f, "*link_data_start:\n");
if (mcu->data_section_start
!= arch->default_data_section_start)
fprintf (f, "\t%%{!Tdata:-Tdata 0x%lX}",
0x800000UL + mcu->data_section_start);
fprintf (f, "\n\n");
fprintf (f, "*link_text_start:\n");
if (mcu->text_section_start != 0x0)
fprintf (f, "\t%%{!Ttext:-Ttext 0x%lX}", 0UL + mcu->text_section_start);
fprintf (f, "\n\n");
}
// Specs known to GCC.
if (is_device)
{
fprintf (f, "*self_spec:\n");
fprintf (f, "\t%%{!mmcu=avr*: %%name);
fprintf (f, "%s\n\n", sp8_spec);
#if defined (WITH_AVRLIBC)
fprintf (f, "%s\n", help_dev_lib_name);
#endif // WITH_AVRLIBC
fprintf (f, "*cpp:\n");
fprintf (f, "\t-D%s -D__AVR_DEVICE_NAME__=%s", mcu->macro, mcu->name);
fprintf (f, "\n\n");
}
fprintf (f, "# End of file\n");
fclose (f);
}
int main (void)
{
for (const avr_mcu_t *mcu = avr_mcu_types; mcu->name; mcu++)
print_mcu (mcu);
return EXIT_SUCCESS;
}