Merge remote-tracking branch 'mst/for_anthony' into staging
[qemu.git] / target-cris / cpu.h
blobd9087759d303ece8a915d56eb72d3f4b37dea0b0
1 /*
2 * CRIS virtual CPU header
4 * Copyright (c) 2007 AXIS Communications AB
5 * Written by Edgar E. Iglesias
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library 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 GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #ifndef CPU_CRIS_H
21 #define CPU_CRIS_H
23 #define TARGET_LONG_BITS 32
25 #define CPUState struct CPUCRISState
27 #include "cpu-defs.h"
29 #define TARGET_HAS_ICE 1
31 #define ELF_MACHINE EM_CRIS
33 #define EXCP_NMI 1
34 #define EXCP_GURU 2
35 #define EXCP_BUSFAULT 3
36 #define EXCP_IRQ 4
37 #define EXCP_BREAK 5
39 /* Register aliases. R0 - R15 */
40 #define R_FP 8
41 #define R_SP 14
42 #define R_ACR 15
44 /* Support regs, P0 - P15 */
45 #define PR_BZ 0
46 #define PR_VR 1
47 #define PR_PID 2
48 #define PR_SRS 3
49 #define PR_WZ 4
50 #define PR_EXS 5
51 #define PR_EDA 6
52 #define PR_PREFIX 6 /* On CRISv10 P6 is reserved, we use it as prefix. */
53 #define PR_MOF 7
54 #define PR_DZ 8
55 #define PR_EBP 9
56 #define PR_ERP 10
57 #define PR_SRP 11
58 #define PR_NRP 12
59 #define PR_CCS 13
60 #define PR_USP 14
61 #define PR_SPC 15
63 /* CPU flags. */
64 #define Q_FLAG 0x80000000
65 #define M_FLAG 0x40000000
66 #define PFIX_FLAG 0x800 /* CRISv10 Only. */
67 #define S_FLAG 0x200
68 #define R_FLAG 0x100
69 #define P_FLAG 0x80
70 #define U_FLAG 0x40
71 #define I_FLAG 0x20
72 #define X_FLAG 0x10
73 #define N_FLAG 0x08
74 #define Z_FLAG 0x04
75 #define V_FLAG 0x02
76 #define C_FLAG 0x01
77 #define ALU_FLAGS 0x1F
79 /* Condition codes. */
80 #define CC_CC 0
81 #define CC_CS 1
82 #define CC_NE 2
83 #define CC_EQ 3
84 #define CC_VC 4
85 #define CC_VS 5
86 #define CC_PL 6
87 #define CC_MI 7
88 #define CC_LS 8
89 #define CC_HI 9
90 #define CC_GE 10
91 #define CC_LT 11
92 #define CC_GT 12
93 #define CC_LE 13
94 #define CC_A 14
95 #define CC_P 15
97 #define NB_MMU_MODES 2
99 typedef struct CPUCRISState {
100 uint32_t regs[16];
101 /* P0 - P15 are referred to as special registers in the docs. */
102 uint32_t pregs[16];
104 /* Pseudo register for the PC. Not directly accessable on CRIS. */
105 uint32_t pc;
107 /* Pseudo register for the kernel stack. */
108 uint32_t ksp;
110 /* Branch. */
111 int dslot;
112 int btaken;
113 uint32_t btarget;
115 /* Condition flag tracking. */
116 uint32_t cc_op;
117 uint32_t cc_mask;
118 uint32_t cc_dest;
119 uint32_t cc_src;
120 uint32_t cc_result;
121 /* size of the operation, 1 = byte, 2 = word, 4 = dword. */
122 int cc_size;
123 /* X flag at the time of cc snapshot. */
124 int cc_x;
126 /* CRIS has certain insns that lockout interrupts. */
127 int locked_irq;
128 int interrupt_vector;
129 int fault_vector;
130 int trap_vector;
132 /* FIXME: add a check in the translator to avoid writing to support
133 register sets beyond the 4th. The ISA allows up to 256! but in
134 practice there is no core that implements more than 4.
136 Support function registers are used to control units close to the
137 core. Accesses do not pass down the normal hierarchy.
139 uint32_t sregs[4][16];
141 /* Linear feedback shift reg in the mmu. Used to provide pseudo
142 randomness for the 'hint' the mmu gives to sw for chosing valid
143 sets on TLB refills. */
144 uint32_t mmu_rand_lfsr;
147 * We just store the stores to the tlbset here for later evaluation
148 * when the hw needs access to them.
150 * One for I and another for D.
152 struct
154 uint32_t hi;
155 uint32_t lo;
156 } tlbsets[2][4][16];
158 CPU_COMMON
160 /* Members after CPU_COMMON are preserved across resets. */
161 void *load_info;
162 } CPUCRISState;
164 CPUCRISState *cpu_cris_init(const char *cpu_model);
165 int cpu_cris_exec(CPUCRISState *s);
166 void cpu_cris_close(CPUCRISState *s);
167 void do_interrupt(CPUCRISState *env);
168 /* you can call this signal handler from your SIGBUS and SIGSEGV
169 signal handlers to inform the virtual CPU of exceptions. non zero
170 is returned if the signal was handled by the virtual CPU. */
171 int cpu_cris_signal_handler(int host_signum, void *pinfo,
172 void *puc);
174 enum {
175 CC_OP_DYNAMIC, /* Use env->cc_op */
176 CC_OP_FLAGS,
177 CC_OP_CMP,
178 CC_OP_MOVE,
179 CC_OP_ADD,
180 CC_OP_ADDC,
181 CC_OP_MCP,
182 CC_OP_ADDU,
183 CC_OP_SUB,
184 CC_OP_SUBU,
185 CC_OP_NEG,
186 CC_OP_BTST,
187 CC_OP_MULS,
188 CC_OP_MULU,
189 CC_OP_DSTEP,
190 CC_OP_MSTEP,
191 CC_OP_BOUND,
193 CC_OP_OR,
194 CC_OP_AND,
195 CC_OP_XOR,
196 CC_OP_LSL,
197 CC_OP_LSR,
198 CC_OP_ASR,
199 CC_OP_LZ
202 /* CRIS uses 8k pages. */
203 #define TARGET_PAGE_BITS 13
204 #define MMAP_SHIFT TARGET_PAGE_BITS
206 #define TARGET_PHYS_ADDR_SPACE_BITS 32
207 #define TARGET_VIRT_ADDR_SPACE_BITS 32
209 #define cpu_init cpu_cris_init
210 #define cpu_exec cpu_cris_exec
211 #define cpu_gen_code cpu_cris_gen_code
212 #define cpu_signal_handler cpu_cris_signal_handler
214 #define CPU_SAVE_VERSION 1
216 /* MMU modes definitions */
217 #define MMU_MODE0_SUFFIX _kernel
218 #define MMU_MODE1_SUFFIX _user
219 #define MMU_USER_IDX 1
220 static inline int cpu_mmu_index (CPUState *env)
222 return !!(env->pregs[PR_CCS] & U_FLAG);
225 int cpu_cris_handle_mmu_fault(CPUState *env, target_ulong address, int rw,
226 int mmu_idx, int is_softmmu);
227 #define cpu_handle_mmu_fault cpu_cris_handle_mmu_fault
229 #if defined(CONFIG_USER_ONLY)
230 static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
232 if (newsp)
233 env->regs[14] = newsp;
234 env->regs[10] = 0;
236 #endif
238 static inline void cpu_set_tls(CPUCRISState *env, target_ulong newtls)
240 env->pregs[PR_PID] = (env->pregs[PR_PID] & 0xff) | newtls;
243 /* Support function regs. */
244 #define SFR_RW_GC_CFG 0][0
245 #define SFR_RW_MM_CFG env->pregs[PR_SRS]][0
246 #define SFR_RW_MM_KBASE_LO env->pregs[PR_SRS]][1
247 #define SFR_RW_MM_KBASE_HI env->pregs[PR_SRS]][2
248 #define SFR_R_MM_CAUSE env->pregs[PR_SRS]][3
249 #define SFR_RW_MM_TLB_SEL env->pregs[PR_SRS]][4
250 #define SFR_RW_MM_TLB_LO env->pregs[PR_SRS]][5
251 #define SFR_RW_MM_TLB_HI env->pregs[PR_SRS]][6
253 #include "cpu-all.h"
255 static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
256 target_ulong *cs_base, int *flags)
258 *pc = env->pc;
259 *cs_base = 0;
260 *flags = env->dslot |
261 (env->pregs[PR_CCS] & (S_FLAG | P_FLAG | U_FLAG
262 | X_FLAG | PFIX_FLAG));
265 #define cpu_list cris_cpu_list
266 void cris_cpu_list(FILE *f, fprintf_function cpu_fprintf);
268 #endif