Hexagon build infrastructure

Add file to default-configs
Add hexagon to meson.build
Add hexagon to target/meson.build
Add target/hexagon/meson.build
Change scripts/qemu-binfmt-conf.sh

We can build a hexagon-linux-user target and run programs on
the Hexagon scalar core.  With hexagon-linux-clang installed,
"make check-tcg" will pass.

Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1612763186-18161-35-git-send-email-tsimpson@quicinc.com>
[rth: Use top-level python variable]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

default-configs/targets/hexagon-linux-user.mak

@@ -0,0 +1 @@
+TARGET_ARCH=hexagon

meson.build

@@ -1188,6 +1188,7 @@ disassemblers = {
   'arm' : ['CONFIG_ARM_DIS'],
   'avr' : ['CONFIG_AVR_DIS'],
   'cris' : ['CONFIG_CRIS_DIS'],
+  'hexagon' : ['CONFIG_HEXAGON_DIS'],
   'hppa' : ['CONFIG_HPPA_DIS'],
   'i386' : ['CONFIG_I386_DIS'],
   'x86_64' : ['CONFIG_I386_DIS'],

scripts/qemu-binfmt-conf.sh

@@ -4,7 +4,7 @@
 qemu_target_list="i386 i486 alpha arm armeb sparc sparc32plus sparc64 \
 ppc ppc64 ppc64le m68k mips mipsel mipsn32 mipsn32el mips64 mips64el \
 sh4 sh4eb s390x aarch64 aarch64_be hppa riscv32 riscv64 xtensa xtensaeb \
-microblaze microblazeel or1k x86_64"
+microblaze microblazeel or1k x86_64 hexagon"
 
 i386_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'
 i386_mask='\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
@@ -136,6 +136,10 @@ or1k_magic='\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\
 or1k_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'
 or1k_family=or1k
 
+hexagon_magic='\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xa4\x00'
+hexagon_mask='\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'
+hexagon_family=hexagon
+
 qemu_get_family() {
     cpu=${HOST_ARCH:-$(uname -m)}
     case "$cpu" in

target/hexagon/meson.build

@@ -0,0 +1,191 @@
+##
+##  Copyright(c) 2020-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
+##
+##  This program 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 2 of the License, or
+##  (at your option) any later version.
+##
+##  This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
+##
+
+hexagon_ss = ss.source_set()
+
+hex_common_py = 'hex_common.py'
+attribs_def = meson.current_source_dir() / 'attribs_def.h.inc'
+gen_tcg_h = meson.current_source_dir() / 'gen_tcg.h'
+
+#
+#  Step 1
+#  We use a C program to create semantics_generated.pyinc
+#
+gen_semantics = executable(
+    'gen_semantics',
+    'gen_semantics.c',
+    native: true, build_by_default: false)
+
+semantics_generated = custom_target(
+    'semantics_generated.pyinc',
+    output: 'semantics_generated.pyinc',
+    input: gen_semantics,
+    command: ['@INPUT@', '@OUTPUT@'],
+)
+hexagon_ss.add(semantics_generated)
+
+#
+# Step 2
+# We use Python scripts to generate the following files
+#     shortcode_generated.h.inc
+#     helper_protos_generated.h.inc
+#     tcg_funcs_generated.c.inc
+#     tcg_func_table_generated.c.inc
+#     helper_funcs_generated.c.inc
+#     printinsn_generated.h.inc
+#     op_regs_generated.h.inc
+#     op_attribs_generated.h.inc
+#     opcodes_def_generated.h.inc
+#
+shortcode_generated = custom_target(
+    'shortcode_generated.h.inc',
+    output: 'shortcode_generated.h.inc',
+    input: 'gen_shortcode.py',
+    depends: [semantics_generated],
+    depend_files: [hex_common_py, attribs_def],
+    command: [python, '@INPUT@', semantics_generated, attribs_def, '@OUTPUT@'],
+)
+hexagon_ss.add(shortcode_generated)
+
+helper_protos_generated = custom_target(
+    'helper_protos_generated.h.inc',
+    output: 'helper_protos_generated.h.inc',
+    input: 'gen_helper_protos.py',
+    depends: [semantics_generated],
+    depend_files: [hex_common_py, attribs_def, gen_tcg_h],
+    command: [python, '@INPUT@', semantics_generated, attribs_def, gen_tcg_h, '@OUTPUT@'],
+)
+hexagon_ss.add(helper_protos_generated)
+
+tcg_funcs_generated = custom_target(
+    'tcg_funcs_generated.c.inc',
+    output: 'tcg_funcs_generated.c.inc',
+    input: 'gen_tcg_funcs.py',
+    depends: [semantics_generated],
+    depend_files: [hex_common_py, attribs_def, gen_tcg_h],
+    command: [python, '@INPUT@', semantics_generated, attribs_def, gen_tcg_h, '@OUTPUT@'],
+)
+hexagon_ss.add(tcg_funcs_generated)
+
+tcg_func_table_generated = custom_target(
+    'tcg_func_table_generated.c.inc',
+    output: 'tcg_func_table_generated.c.inc',
+    input: 'gen_tcg_func_table.py',
+    depends: [semantics_generated],
+    depend_files: [hex_common_py, attribs_def],
+    command: [python, '@INPUT@', semantics_generated, attribs_def, '@OUTPUT@'],
+)
+hexagon_ss.add(tcg_func_table_generated)
+
+helper_funcs_generated = custom_target(
+    'helper_funcs_generated.c.inc',
+    output: 'helper_funcs_generated.c.inc',
+    input: 'gen_helper_funcs.py',
+    depends: [semantics_generated],
+    depend_files: [hex_common_py, attribs_def, gen_tcg_h],
+    command: [python, '@INPUT@', semantics_generated, attribs_def, gen_tcg_h, '@OUTPUT@'],
+)
+hexagon_ss.add(helper_funcs_generated)
+
+printinsn_generated = custom_target(
+    'printinsn_generated.h.inc',
+    output: 'printinsn_generated.h.inc',
+    input: 'gen_printinsn.py',
+    depends: [semantics_generated],
+    depend_files: [hex_common_py, attribs_def],
+    command: [python, '@INPUT@', semantics_generated, attribs_def, '@OUTPUT@'],
+)
+hexagon_ss.add(printinsn_generated)
+
+op_regs_generated = custom_target(
+    'op_regs_generated.h.inc',
+    output: 'op_regs_generated.h.inc',
+    input: 'gen_op_regs.py',
+    depends: [semantics_generated],
+    depend_files: [hex_common_py, attribs_def],
+    command: [python, '@INPUT@', semantics_generated, attribs_def, '@OUTPUT@'],
+)
+hexagon_ss.add(op_regs_generated)
+
+op_attribs_generated = custom_target(
+    'op_attribs_generated.h.inc',
+    output: 'op_attribs_generated.h.inc',
+    input: 'gen_op_attribs.py',
+    depends: [semantics_generated],
+    depend_files: [hex_common_py, attribs_def],
+    command: [python, '@INPUT@', semantics_generated, attribs_def, '@OUTPUT@'],
+)
+hexagon_ss.add(op_attribs_generated)
+
+opcodes_def_generated = custom_target(
+    'opcodes_def_generated.h.inc',
+    output: 'opcodes_def_generated.h.inc',
+    input: 'gen_opcodes_def.py',
+    depends: [semantics_generated],
+    depend_files: [hex_common_py, attribs_def],
+    command: [python, '@INPUT@', semantics_generated, attribs_def, '@OUTPUT@'],
+)
+hexagon_ss.add(opcodes_def_generated)
+
+#
+# Step 3
+# We use a C program to create iset.py which is imported into dectree.py
+# to create the decode tree
+#
+gen_dectree_import = executable(
+    'gen_dectree_import',
+    'gen_dectree_import.c', opcodes_def_generated, op_regs_generated,
+    native: true, build_by_default: false)
+
+iset_py = custom_target(
+    'iset.py',
+    output: 'iset.py',
+    input: gen_dectree_import,
+    command: ['@INPUT@', '@OUTPUT@'],
+)
+hexagon_ss.add(iset_py)
+
+#
+# Step 4
+# We use the dectree.py script to generate the decode tree header file
+#
+dectree_generated = custom_target(
+    'dectree_generated.h.inc',
+    output: 'dectree_generated.h.inc',
+    input: 'dectree.py',
+    depends: [iset_py],
+    command: ['PYTHONPATH=' + meson.current_build_dir(), '@INPUT@', '@OUTPUT@'],
+)
+hexagon_ss.add(dectree_generated)
+
+hexagon_ss.add(files(
+    'cpu.c',
+    'translate.c',
+    'op_helper.c',
+    'gdbstub.c',
+    'genptr.c',
+    'reg_fields.c',
+    'decode.c',
+    'iclass.c',
+    'opcodes.c',
+    'printinsn.c',
+    'arch.c',
+    'fma_emu.c',
+    'conv_emu.c',
+))
+
+target_arch += {'hexagon': hexagon_ss}

target/meson.build

@@ -2,6 +2,7 @@ subdir('alpha')
 subdir('arm')
 subdir('avr')
 subdir('cris')
+subdir('hexagon')
 subdir('hppa')
 subdir('i386')
 subdir('lm32')