target/avr: Register AVR support with the rest of QEMU

Add AVR related definitions into QEMU, make AVR support buildable.

[AM: Remove word 'Atmel' from filenames and all elements of code]
Suggested-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com>
Signed-off-by: Michael Rolnik <mrolnik@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
Message-Id: <20200705140315.260514-23-huth@tuxfamily.org>
[PMD: Fixed @avr tag in qapi/machine.json]
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

MAINTAINERS

@@ -975,6 +975,15 @@ F: include/hw/*/nrf51*.h
 F: include/hw/*/microbit*.h
 F: tests/qtest/microbit-test.c
 
+AVR Machines
+-------------
+
+AVR MCUs
+M: Michael Rolnik <mrolnik@gmail.com>
+R: Sarah Harris <S.E.Harris@kent.ac.uk>
+S: Maintained
+F: default-configs/avr-softmmu.mak
+
 CRIS Machines
 -------------
 Axis Dev88

arch_init.c

@@ -90,6 +90,8 @@ int graphic_depth = 32;
 #define QEMU_ARCH QEMU_ARCH_UNICORE32
 #elif defined(TARGET_XTENSA)
 #define QEMU_ARCH QEMU_ARCH_XTENSA
+#elif defined(TARGET_AVR)
+#define QEMU_ARCH QEMU_ARCH_AVR
 #endif
 
 const uint32_t arch_type = QEMU_ARCH;

configure

@@ -8143,6 +8143,10 @@ case "$target_name" in
     mttcg="yes"
     gdb_xml_files="aarch64-core.xml aarch64-fpu.xml arm-core.xml arm-vfp.xml arm-vfp3.xml arm-neon.xml arm-m-profile.xml"
   ;;
+  avr)
+    gdb_xml_files="avr-cpu.xml"
+    target_compiler=$cross_cc_avr
+  ;;
   cris)
   ;;
   hppa)
@@ -8387,6 +8391,9 @@ for i in $ARCH $TARGET_BASE_ARCH ; do
       disas_config "ARM_A64"
     fi
   ;;
+  avr)
+    disas_config "AVR"
+  ;;
   cris)
     disas_config "CRIS"
   ;;

default-configs/avr-softmmu.mak

@@ -0,0 +1 @@
+# Default configuration for avr-softmmu

include/disas/dis-asm.h

@@ -211,6 +211,25 @@ enum bfd_architecture
 #define bfd_mach_m32r          0  /* backwards compatibility */
   bfd_arch_mn10200,    /* Matsushita MN10200 */
   bfd_arch_mn10300,    /* Matsushita MN10300 */
+  bfd_arch_avr,        /* AVR microcontrollers */
+#define bfd_mach_avr1       1
+#define bfd_mach_avr2       2
+#define bfd_mach_avr25      25
+#define bfd_mach_avr3       3
+#define bfd_mach_avr31      31
+#define bfd_mach_avr35      35
+#define bfd_mach_avr4       4
+#define bfd_mach_avr5       5
+#define bfd_mach_avr51      51
+#define bfd_mach_avr6       6
+#define bfd_mach_avrtiny    100
+#define bfd_mach_avrxmega1  101
+#define bfd_mach_avrxmega2  102
+#define bfd_mach_avrxmega3  103
+#define bfd_mach_avrxmega4  104
+#define bfd_mach_avrxmega5  105
+#define bfd_mach_avrxmega6  106
+#define bfd_mach_avrxmega7  107
   bfd_arch_cris,       /* Axis CRIS */
 #define bfd_mach_cris_v0_v10   255
 #define bfd_mach_cris_v32      32

include/sysemu/arch_init.h

@@ -25,6 +25,7 @@ enum {
     QEMU_ARCH_HPPA = (1 << 18),
     QEMU_ARCH_RISCV = (1 << 19),
     QEMU_ARCH_RX = (1 << 20),
+    QEMU_ARCH_AVR = (1 << 21),
 
     QEMU_ARCH_NONE = (1 << 31),
 };

qapi/machine.json

@@ -17,6 +17,7 @@
 # being.
 #
 # @rx: since 5.0
+# @avr: since 5.1
 #
 # Notes: The resulting QMP strings can be appended to the "qemu-system-"
 #        prefix to produce the corresponding QEMU executable name. This
@@ -25,7 +26,7 @@
 # Since: 3.0
 ##
 { 'enum' : 'SysEmuTarget',
-  'data' : [ 'aarch64', 'alpha', 'arm', 'cris', 'hppa', 'i386', 'lm32',
+  'data' : [ 'aarch64', 'alpha', 'arm', 'avr', 'cris', 'hppa', 'i386', 'lm32',
              'm68k', 'microblaze', 'microblazeel', 'mips', 'mips64',
              'mips64el', 'mipsel', 'moxie', 'nios2', 'or1k', 'ppc',
              'ppc64', 'riscv32', 'riscv64', 'rx', 's390x', 'sh4',

target/avr/Makefile.objs

@@ -0,0 +1,34 @@
+#
+#  QEMU AVR
+#
+#  Copyright (c) 2016-2020 Michael Rolnik
+#
+#  This library is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU Lesser General Public
+#  License as published by the Free Software Foundation; either
+#  version 2.1 of the License, or (at your option) any later version.
+#
+#  This library 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
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public
+#  License along with this library; if not, see
+#  <http://www.gnu.org/licenses/lgpl-2.1.html>
+#
+
+DECODETREE = $(SRC_PATH)/scripts/decodetree.py
+decode-y = $(SRC_PATH)/target/avr/insn.decode
+
+target/avr/decode_insn.inc.c: $(decode-y) $(DECODETREE)
+	$(call quiet-command, \
+	  $(PYTHON) $(DECODETREE) -o $@ --decode decode_insn --insnwidth 16 $<, \
+	  "GEN", $(TARGET_DIR)$@)
+
+target/avr/translate.o: target/avr/decode_insn.inc.c
+
+obj-y += translate.o cpu.o helper.o
+obj-y += gdbstub.o
+obj-y += disas.o
+obj-$(CONFIG_SOFTMMU) += machine.o