1 /* Target-dependent header for the Nios II architecture, for GDB. 2 Copyright (C) 2012-2016 Free Software Foundation, Inc. 3 Contributed by Mentor Graphics, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #ifndef NIOS2_TDEP_H 21 #define NIOS2_TDEP_H 22 23 /* Nios II ISA specific encodings and macros. */ 24 #include "opcode/nios2.h" 25 26 /* Registers. */ 27 #define NIOS2_Z_REGNUM 0 /* Zero */ 28 #define NIOS2_R2_REGNUM 2 /* used for return value */ 29 #define NIOS2_R3_REGNUM 3 /* used for return value */ 30 /* Used for hidden zero argument to store ptr to struct return value. */ 31 #define NIOS2_R4_REGNUM 4 32 #define NIOS2_R7_REGNUM 7 33 #define NIOS2_GP_REGNUM 26 /* Global Pointer */ 34 #define NIOS2_SP_REGNUM 27 /* Stack Pointer */ 35 #define NIOS2_FP_REGNUM 28 /* Frame Pointer */ 36 #define NIOS2_EA_REGNUM 29 /* Exception address */ 37 #define NIOS2_BA_REGNUM 30 /* Breakpoint return address */ 38 #define NIOS2_RA_REGNUM 31 /* Return address */ 39 #define NIOS2_PC_REGNUM 32 40 41 /* Control registers. */ 42 #define NIOS2_STATUS_REGNUM 33 43 #define NIOS2_ESTATUS_REGNUM 34 44 #define NIOS2_BSTATUS_REGNUM 35 45 #define NIOS2_IENABLE_REGNUM 36 46 #define NIOS2_IPENDING_REGNUM 37 47 #define NIOS2_CPUID_REGNUM 38 48 #define NIOS2_EXCEPTION_REGNUM 40 49 #define NIOS2_PTEADDR_REGNUM 41 50 #define NIOS2_TLBACC_REGNUM 42 51 #define NIOS2_TLBMISC_REGNUM 43 52 #define NIOS2_ECCINJ_REGNUM 44 53 #define NIOS2_BADADDR_REGNUM 45 54 #define NIOS2_CONFIG_REGNUM 46 55 #define NIOS2_MPUBASE_REGNUM 47 56 #define NIOS2_MPUACC_REGNUM 48 57 58 /* R4-R7 are used for argument passing. */ 59 #define NIOS2_FIRST_ARGREG NIOS2_R4_REGNUM 60 #define NIOS2_LAST_ARGREG NIOS2_R7_REGNUM 61 62 /* Number of all registers. */ 63 #define NIOS2_NUM_REGS 49 64 65 /* Size of an instruction, in bytes. */ 66 #define NIOS2_OPCODE_SIZE 4 67 #define NIOS2_CDX_OPCODE_SIZE 2 68 69 /* Target-dependent structure in gdbarch. */ 70 struct gdbarch_tdep 71 { 72 /* Assumes FRAME is stopped at a syscall (trap) instruction; returns 73 the expected next PC. */ 74 CORE_ADDR (*syscall_next_pc) (struct frame_info *frame, 75 const struct nios2_opcode *op); 76 77 /* Offset to PC value in jump buffer. 78 If this is negative, longjmp support will be disabled. */ 79 int jb_pc; 80 }; 81 82 extern struct target_desc *tdesc_nios2_linux; 83 extern struct target_desc *tdesc_nios2; 84 85 #endif /* NIOS2_TDEP_H */ 86