driver-avr.c revision 1.1.1.2 
1/* Subroutines for the gcc driver.
2   Copyright (C) 2009-2013 Free Software Foundation, Inc.
3   Contributed by Anatoly Sokolov <aesok@post.ru>
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 3, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING3.  If not see
19<http://www.gnu.org/licenses/>.  */
20
21#include "config.h"
22#include "system.h"
23#include "coretypes.h"
24#include "tm.h"
25
26/* Current architecture.  */
27const avr_arch_t *avr_current_arch = NULL;
28
29/* Current device.  */
30const avr_mcu_t *avr_current_device = NULL;
31
32/* Initialize avr_current_arch and avr_current_device variables.  */
33
34static void
35avr_set_current_device (const char *name)
36{
37
38 if (NULL != avr_current_arch)
39   return;
40
41  for (avr_current_device = avr_mcu_types; avr_current_device->name;
42       avr_current_device++)
43    {
44      if (strcmp (avr_current_device->name, name) == 0)
45        break;
46    }
47
48  avr_current_arch = &avr_arch_types[avr_current_device->arch];
49}
50
51/* Returns command line parameters to pass to as.  */
52
53const char*
54avr_device_to_as (int argc, const char **argv)
55{
56  if (0 == argc)
57    return NULL;
58
59  avr_set_current_device (argv[0]);
60
61  return concat ("-mmcu=", avr_current_arch->arch_name,
62                 avr_current_device->errata_skip ? "" : " -mno-skip-bug",
63                 NULL);
64}
65
66/* Returns command line parameters to pass to ld.  */
67
68const char*
69avr_device_to_ld (int argc, const char **argv)
70{
71  if (0 == argc)
72    return NULL;
73
74  avr_set_current_device (argv[0]);
75
76  return concat ("-m ", avr_current_arch->arch_name, NULL);
77}
78
79/* Returns command line parameters that describe start of date section.  */
80
81const char *
82avr_device_to_data_start (int argc, const char **argv)
83{
84  unsigned long data_section_start;
85  char data_section_start_str[16];
86
87  if (0 == argc)
88    return NULL;
89
90  avr_set_current_device (argv[0]);
91
92  if (avr_current_device->data_section_start
93      == avr_current_arch->default_data_section_start)
94    return NULL;
95
96  data_section_start = 0x800000 + avr_current_device->data_section_start;
97
98  snprintf (data_section_start_str, sizeof(data_section_start_str) - 1,
99            "0x%lX", data_section_start);
100
101  return concat ("-Tdata ", data_section_start_str, NULL);
102}
103
104/* Returns command line parameters that describe the device startfile.  */
105
106const char *
107avr_device_to_startfiles (int argc, const char **argv)
108{
109  if (0 == argc)
110    return NULL;
111
112  avr_set_current_device (argv[0]);
113
114  return concat ("crt", avr_current_device->library_name, ".o%s", NULL);
115}
116
117/* Returns command line parameters that describe the device library.  */
118
119const char *
120avr_device_to_devicelib (int argc, const char **argv)
121{
122  if (0 == argc)
123    return NULL;
124
125  avr_set_current_device (argv[0]);
126
127  return concat ("-l", avr_current_device->library_name, NULL);
128}
129
130const char*
131avr_device_to_sp8 (int argc, const char **argv)
132{
133  if (0 == argc)
134    return NULL;
135
136  avr_set_current_device (argv[0]);
137
138  /* Leave "avr2" and "avr25" alone.  These two architectures are
139     the only ones that mix devices with 8-bit SP and 16-bit SP.
140     -msp8 is set by mmultilib machinery.  */
141
142  if (avr_current_device->macro == NULL
143      && (avr_current_device->arch == ARCH_AVR2
144          || avr_current_device->arch == ARCH_AVR25))
145    return "";
146
147  return avr_current_device->short_sp
148    ? "-msp8"
149    : "%<msp8";
150}
151