Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-hex-20210218' into staging

Initial commit for the Qualcomm Hexagon processor.

# gpg: Signature made Thu 18 Feb 2021 16:26:52 GMT
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth-gitlab/tags/pull-hex-20210218: (35 commits)
  Hexagon build infrastructure
  Hexagon (tests/tcg/hexagon) TCG tests - floating point
  Hexagon (tests/tcg/hexagon) TCG tests - atomics/load/store/misc
  Hexagon (tests/tcg/hexagon) TCG tests - multiarch
  Hexagon (linux-user/hexagon) Linux user emulation
  Hexagon (target/hexagon) translation
  Hexagon (target/hexagon) TCG for floating point instructions
  Hexagon (target/hexagon) TCG for instructions with multiple definitions
  Hexagon (target/hexagon) TCG generation
  Hexagon (target/hexagon) instruction classes
  Hexagon (target/hexagon) macros
  Hexagon (target/hexagon) opcode data structures
  Hexagon (target/hexagon) generater phase 4 - decode tree
  Hexagon (target/hexagon) generator phase 3 - C preprocessor for decode tree
  Hexagon (target/hexagon) generator phase 2 - generate header files
  Hexagon (target/hexagon) generator phase 1 - C preprocessor for semantics
  Hexagon (target/hexagon/imported) arch import
  Hexagon (target/hexagon/fma_emu.[ch]) utility functions
  Hexagon (target/hexagon/conv_emu.[ch]) utility functions
  Hexagon (target/hexagon/arch.[ch]) utility functions
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 58 insertions, 0 deletions

diff --git a/target/hexagon/cpu_bits.h b/target/hexagon/cpu_bits.h
new file mode 100644
index 0000000000..96af834d0e
--- /dev/null
+++ b/target/hexagon/cpu_bits.h
@@ -0,0 +1,58 @@
+/*
+ *  Copyright(c) 2019-2021 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/>.
+ */
+
+#ifndef HEXAGON_CPU_BITS_H
+#define HEXAGON_CPU_BITS_H
+
+#include "qemu/bitops.h"
+
+#define HEX_EXCP_FETCH_NO_UPAGE  0x012
+#define HEX_EXCP_INVALID_PACKET  0x015
+#define HEX_EXCP_INVALID_OPCODE  0x015
+#define HEX_EXCP_PRIV_NO_UREAD   0x024
+#define HEX_EXCP_PRIV_NO_UWRITE  0x025
+
+#define HEX_EXCP_TRAP0           0x172
+
+#define PACKET_WORDS_MAX         4
+
+static inline uint32_t parse_bits(uint32_t encoding)
+{
+    /* The parse bits are [15:14] */
+    return extract32(encoding, 14, 2);
+}
+
+static inline uint32_t iclass_bits(uint32_t encoding)
+{
+    /* The instruction class is encoded in bits [31:28] */
+    uint32_t iclass = extract32(encoding, 28, 4);
+    /* If parse bits are zero, this is a duplex */
+    if (parse_bits(encoding) == 0) {
+        iclass += 16;
+    }
+    return iclass;
+}
+
+static inline int is_packet_end(uint32_t endocing)
+{
+    uint32_t bits = parse_bits(endocing);
+    return ((bits == 0x3) || (bits == 0x0));
+}
+
+int disassemble_hexagon(uint32_t *words, int nwords, bfd_vma pc, GString *buf);
+
+#endif