gcc/config/avr/avr-arch.h

   1 /* Definitions of types that are used to store AVR architecture and
   2    device information.
   3    Copyright (C) 2012-2013 Free Software Foundation, Inc.
   4    Contributed by Georg-Johann Lay (avr@gjlay.de)
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22
  23 /* This enum supplies indices into the avr_arch_types[] table below. */
  24
  25 enum avr_arch
  26 {
  27   ARCH_UNKNOWN,
  28   ARCH_AVR1,
  29   ARCH_AVR2,
  30   ARCH_AVR25,
  31   ARCH_AVR3,
  32   ARCH_AVR31,
  33   ARCH_AVR35,
  34   ARCH_AVR4,
  35   ARCH_AVR5,
  36   ARCH_AVR51,
  37   ARCH_AVR6,
  38   ARCH_AVRXMEGA2,
  39   ARCH_AVRXMEGA4,
  40   ARCH_AVRXMEGA5,
  41   ARCH_AVRXMEGA6,
  42   ARCH_AVRXMEGA7
  43 };
  44
  45
  46 /* Architecture-specific properties.  */
  47
  48 typedef struct
  49 {
  50   /* Assembler only.  */
  51   int asm_only;
  52
  53   /* Core have 'MUL*' instructions.  */
  54   int have_mul;
  55
  56   /* Core have 'CALL' and 'JMP' instructions.  */
  57   int have_jmp_call;
  58
  59   /* Core have 'MOVW' and 'LPM Rx,Z' instructions.  */
  60   int have_movw_lpmx;
  61
  62   /* Core have 'ELPM' instructions.  */
  63   int have_elpm;
  64
  65   /* Core have 'ELPM Rx,Z' instructions.  */
  66   int have_elpmx;
  67
  68   /* Core have 'EICALL' and 'EIJMP' instructions.  */
  69   int have_eijmp_eicall;
  70
  71   /* This is an XMEGA core.  */
  72   int xmega_p;
  73
  74   /* This core has the RAMPD special function register
  75      and thus also the RAMPX, RAMPY and RAMPZ registers.  */
  76   int have_rampd;
  77
  78   /* Default start of data section address for architecture.  */
  79   int default_data_section_start;
  80
  81   /* Offset between SFR address and RAM address:
  82      SFR-address = RAM-address - sfr_offset  */
  83   int sfr_offset;
  84
  85   /* Architecture id to built-in define __AVR_ARCH__ (NULL -> no macro) */
  86   const char *const macro;
  87
  88   /* Architecture name.  */
  89   const char *const arch_name;
  90 } avr_arch_t;
  91
  92
  93 /* Device-specific properties.  */
  94
  95 typedef struct
  96 {
  97   /* Device name.  */
  98   const char *const name;
  99
 100   /* Index in avr_arch_types[].  */
 101   enum avr_arch arch;
 102
 103   /* Must lie outside user's namespace.  NULL == no macro.  */
 104   const char *const macro;
 105
 106   /* Stack pointer have 8 bits width.  */
 107   int short_sp;
 108
 109   /* Some AVR devices have a core erratum when skipping a 2-word instruction.
 110      Skip instructions are:  SBRC, SBRS, SBIC, SBIS, CPSE.
 111      Problems will occur with return address is IRQ executes during the
 112      skip sequence.
 113
 114      A support ticket from Atmel returned the following information:
 115
 116          Subject: (ATTicket:644469) On AVR skip-bug core Erratum
 117          From: avr@atmel.com                    Date: 2011-07-27
 118          (Please keep the subject when replying to this mail)
 119
 120          This errata exists only in AT90S8515 and ATmega103 devices.
 121
 122          For information please refer the following respective errata links
 123             http://www.atmel.com/dyn/resources/prod_documents/doc2494.pdf
 124             http://www.atmel.com/dyn/resources/prod_documents/doc1436.pdf  */
 125
 126   /* Core Erratum:  Must not skip 2-word instruction.  */
 127   int errata_skip;
 128
 129   /* Start of data section.  */
 130   int data_section_start;
 131
 132   /* Number of 64k segments in the flash.  */
 133   int n_flash;
 134
 135   /* Name of device library.  */
 136   const char *const library_name;
 137 } avr_mcu_t;
 138
 139 /* Map architecture to its texinfo string.  */
 140
 141 typedef struct
 142 {
 143   /* Architecture ID.  */
 144   enum avr_arch arch;
 145
 146   /* textinfo source to describe the archtiecture.  */
 147   const char *texinfo;
 148 } avr_arch_info_t;
 149
 150 /* Preprocessor macros to define depending on MCU type.  */
 151
 152 extern const avr_arch_t avr_arch_types[];
 153 extern const avr_arch_t *avr_current_arch;
 154
 155 extern const avr_mcu_t avr_mcu_types[];
 156 extern const avr_mcu_t *avr_current_device;