1 /* Target-dependent header for the Nios II architecture, for GDB.
2 Copyright (C) 2012-2017 Free Software Foundation, Inc.
3 Contributed by Mentor Graphics, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
23 /* Nios II ISA specific encodings and macros. */
24 #include "opcode/nios2.h"
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
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
58 /* R4-R7 are used for argument passing. */
59 #define NIOS2_FIRST_ARGREG NIOS2_R4_REGNUM
60 #define NIOS2_LAST_ARGREG NIOS2_R7_REGNUM
62 /* Number of all registers. */
63 #define NIOS2_NUM_REGS 49
65 /* Size of an instruction, in bytes. */
66 #define NIOS2_OPCODE_SIZE 4
67 #define NIOS2_CDX_OPCODE_SIZE 2
69 /* Target-dependent structure in gdbarch. */
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
);
77 /* Offset to PC value in jump buffer.
78 If this is negative, longjmp support will be disabled. */
82 extern struct target_desc
*tdesc_nios2_linux
;
83 extern struct target_desc
*tdesc_nios2
;
85 #endif /* NIOS2_TDEP_H */
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