1 /* Copyright (C) 2017-2020 Free Software Foundation, Inc. 2 3 This file is part of GDB. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #ifndef ARCH_ARC_H 19 #define ARCH_ARC_H 20 21 #include "gdbsupport/tdesc.h" 22 23 /* Supported ARC ISAs. */ 24 enum arc_isa 25 { 26 ARC_ISA_ARCV1 = 1, /* a.k.a. ARCompact (ARC600, ARC700) */ 27 ARC_ISA_ARCV2 /* such as ARC EM and ARC HS */ 28 }; 29 30 struct arc_gdbarch_features 31 { 32 arc_gdbarch_features (int reg_size, arc_isa isa) 33 : reg_size (reg_size), isa (isa) 34 {} 35 36 /* Register size in bytes. Possible values are 4, and 8. A 0 indicates 37 an uninitialised value. */ 38 const int reg_size; 39 40 /* See ARC_ISA enum. */ 41 const arc_isa isa; 42 43 /* Equality operator. */ 44 bool operator== (const struct arc_gdbarch_features &rhs) const 45 { 46 return (reg_size == rhs.reg_size && isa == rhs.isa); 47 } 48 49 /* Inequality operator. */ 50 bool operator!= (const struct arc_gdbarch_features &rhs) const 51 { 52 return !(*this == rhs); 53 } 54 55 /* Used by std::unordered_map to hash the feature sets. The hash is 56 calculated in the manner below: 57 REG_SIZE | ISA 58 5-bits | 4-bits */ 59 60 std::size_t hash () const noexcept 61 { 62 std::size_t val = ((reg_size & 0x1f) << 8 | (isa & 0xf) << 0); 63 return val; 64 } 65 }; 66 67 #ifdef GDBSERVER 68 69 /* Create and return a target description that is compatible with FEATURES. 70 The only external client of this must be the gdbserver which manipulates 71 the returned data. */ 72 73 target_desc *arc_create_target_description 74 (const struct arc_gdbarch_features &features); 75 76 #else 77 78 /* Lookup the cache for a target description matching the FEATURES. 79 If nothing is found, then create one and return it. */ 80 81 const target_desc *arc_lookup_target_description 82 (const struct arc_gdbarch_features &features); 83 84 #endif /* GDBSERVER */ 85 86 87 #endif /* ARCH_ARC_H */ 88