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e67db06e JL |
1 | /* |
2 | * OpenRISC virtual CPU header. | |
3 | * | |
4 | * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com> | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifndef CPU_OPENRISC_H | |
21 | #define CPU_OPENRISC_H | |
22 | ||
23 | #define TARGET_LONG_BITS 32 | |
24 | #define ELF_MACHINE EM_OPENRISC | |
25 | ||
26 | #define CPUArchState struct CPUOpenRISCState | |
27 | ||
726fe045 JL |
28 | /* cpu_openrisc_map_address_* in CPUOpenRISCTLBContext need this decl. */ |
29 | struct OpenRISCCPU; | |
30 | ||
e67db06e JL |
31 | #include "config.h" |
32 | #include "qemu-common.h" | |
33 | #include "cpu-defs.h" | |
34 | #include "softfloat.h" | |
35 | #include "qemu/cpu.h" | |
36 | #include "error.h" | |
37 | ||
38 | #define TYPE_OPENRISC_CPU "or32-cpu" | |
39 | ||
40 | #define OPENRISC_CPU_CLASS(klass) \ | |
41 | OBJECT_CLASS_CHECK(OpenRISCCPUClass, (klass), TYPE_OPENRISC_CPU) | |
42 | #define OPENRISC_CPU(obj) \ | |
43 | OBJECT_CHECK(OpenRISCCPU, (obj), TYPE_OPENRISC_CPU) | |
44 | #define OPENRISC_CPU_GET_CLASS(obj) \ | |
45 | OBJECT_GET_CLASS(OpenRISCCPUClass, (obj), TYPE_OPENRISC_CPU) | |
46 | ||
47 | /** | |
48 | * OpenRISCCPUClass: | |
49 | * @parent_reset: The parent class' reset handler. | |
50 | * | |
51 | * A OpenRISC CPU model. | |
52 | */ | |
53 | typedef struct OpenRISCCPUClass { | |
54 | /*< private >*/ | |
55 | CPUClass parent_class; | |
56 | /*< public >*/ | |
57 | ||
58 | void (*parent_reset)(CPUState *cpu); | |
59 | } OpenRISCCPUClass; | |
60 | ||
61 | #define NB_MMU_MODES 3 | |
62 | ||
726fe045 JL |
63 | enum { |
64 | MMU_NOMMU_IDX = 0, | |
65 | MMU_SUPERVISOR_IDX = 1, | |
66 | MMU_USER_IDX = 2, | |
67 | }; | |
68 | ||
e67db06e JL |
69 | #define TARGET_PAGE_BITS 13 |
70 | ||
71 | #define TARGET_PHYS_ADDR_SPACE_BITS 32 | |
72 | #define TARGET_VIRT_ADDR_SPACE_BITS 32 | |
73 | ||
74 | #define SET_FP_CAUSE(reg, v) do {\ | |
75 | (reg) = ((reg) & ~(0x3f << 12)) | \ | |
76 | ((v & 0x3f) << 12);\ | |
77 | } while (0) | |
78 | #define GET_FP_ENABLE(reg) (((reg) >> 7) & 0x1f) | |
79 | #define UPDATE_FP_FLAGS(reg, v) do {\ | |
80 | (reg) |= ((v & 0x1f) << 2);\ | |
81 | } while (0) | |
82 | ||
83 | /* Internal flags, delay slot flag */ | |
84 | #define D_FLAG 1 | |
85 | ||
86 | /* Registers */ | |
87 | enum { | |
88 | R0 = 0, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, | |
89 | R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, | |
90 | R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, | |
91 | R31 | |
92 | }; | |
93 | ||
94 | /* Register aliases */ | |
95 | enum { | |
96 | R_ZERO = R0, | |
97 | R_SP = R1, | |
98 | R_FP = R2, | |
99 | R_LR = R9, | |
100 | R_RV = R11, | |
101 | R_RVH = R12 | |
102 | }; | |
103 | ||
104 | /* Unit presece register */ | |
105 | enum { | |
106 | UPR_UP = (1 << 0), | |
107 | UPR_DCP = (1 << 1), | |
108 | UPR_ICP = (1 << 2), | |
109 | UPR_DMP = (1 << 3), | |
110 | UPR_IMP = (1 << 4), | |
111 | UPR_MP = (1 << 5), | |
112 | UPR_DUP = (1 << 6), | |
113 | UPR_PCUR = (1 << 7), | |
114 | UPR_PMP = (1 << 8), | |
115 | UPR_PICP = (1 << 9), | |
116 | UPR_TTP = (1 << 10), | |
117 | UPR_CUP = (255 << 24), | |
118 | }; | |
119 | ||
120 | /* CPU configure register */ | |
121 | enum { | |
122 | CPUCFGR_NSGF = (15 << 0), | |
123 | CPUCFGR_CGF = (1 << 4), | |
124 | CPUCFGR_OB32S = (1 << 5), | |
125 | CPUCFGR_OB64S = (1 << 6), | |
126 | CPUCFGR_OF32S = (1 << 7), | |
127 | CPUCFGR_OF64S = (1 << 8), | |
128 | CPUCFGR_OV64S = (1 << 9), | |
129 | }; | |
130 | ||
131 | /* DMMU configure register */ | |
132 | enum { | |
133 | DMMUCFGR_NTW = (3 << 0), | |
134 | DMMUCFGR_NTS = (7 << 2), | |
135 | DMMUCFGR_NAE = (7 << 5), | |
136 | DMMUCFGR_CRI = (1 << 8), | |
137 | DMMUCFGR_PRI = (1 << 9), | |
138 | DMMUCFGR_TEIRI = (1 << 10), | |
139 | DMMUCFGR_HTR = (1 << 11), | |
140 | }; | |
141 | ||
142 | /* IMMU configure register */ | |
143 | enum { | |
144 | IMMUCFGR_NTW = (3 << 0), | |
145 | IMMUCFGR_NTS = (7 << 2), | |
146 | IMMUCFGR_NAE = (7 << 5), | |
147 | IMMUCFGR_CRI = (1 << 8), | |
148 | IMMUCFGR_PRI = (1 << 9), | |
149 | IMMUCFGR_TEIRI = (1 << 10), | |
150 | IMMUCFGR_HTR = (1 << 11), | |
151 | }; | |
152 | ||
153 | /* Float point control status register */ | |
154 | enum { | |
155 | FPCSR_FPEE = 1, | |
156 | FPCSR_RM = (3 << 1), | |
157 | FPCSR_OVF = (1 << 3), | |
158 | FPCSR_UNF = (1 << 4), | |
159 | FPCSR_SNF = (1 << 5), | |
160 | FPCSR_QNF = (1 << 6), | |
161 | FPCSR_ZF = (1 << 7), | |
162 | FPCSR_IXF = (1 << 8), | |
163 | FPCSR_IVF = (1 << 9), | |
164 | FPCSR_INF = (1 << 10), | |
165 | FPCSR_DZF = (1 << 11), | |
166 | }; | |
167 | ||
168 | /* Exceptions indices */ | |
169 | enum { | |
170 | EXCP_RESET = 0x1, | |
171 | EXCP_BUSERR = 0x2, | |
172 | EXCP_DPF = 0x3, | |
173 | EXCP_IPF = 0x4, | |
174 | EXCP_TICK = 0x5, | |
175 | EXCP_ALIGN = 0x6, | |
176 | EXCP_ILLEGAL = 0x7, | |
177 | EXCP_INT = 0x8, | |
178 | EXCP_DTLBMISS = 0x9, | |
179 | EXCP_ITLBMISS = 0xa, | |
180 | EXCP_RANGE = 0xb, | |
181 | EXCP_SYSCALL = 0xc, | |
182 | EXCP_FPE = 0xd, | |
183 | EXCP_TRAP = 0xe, | |
184 | EXCP_NR, | |
185 | }; | |
186 | ||
187 | /* Supervisor register */ | |
188 | enum { | |
189 | SR_SM = (1 << 0), | |
190 | SR_TEE = (1 << 1), | |
191 | SR_IEE = (1 << 2), | |
192 | SR_DCE = (1 << 3), | |
193 | SR_ICE = (1 << 4), | |
194 | SR_DME = (1 << 5), | |
195 | SR_IME = (1 << 6), | |
196 | SR_LEE = (1 << 7), | |
197 | SR_CE = (1 << 8), | |
198 | SR_F = (1 << 9), | |
199 | SR_CY = (1 << 10), | |
200 | SR_OV = (1 << 11), | |
201 | SR_OVE = (1 << 12), | |
202 | SR_DSX = (1 << 13), | |
203 | SR_EPH = (1 << 14), | |
204 | SR_FO = (1 << 15), | |
205 | SR_SUMRA = (1 << 16), | |
206 | SR_SCE = (1 << 17), | |
207 | }; | |
208 | ||
209 | /* OpenRISC Hardware Capabilities */ | |
210 | enum { | |
211 | OPENRISC_FEATURE_NSGF = (15 << 0), | |
212 | OPENRISC_FEATURE_CGF = (1 << 4), | |
213 | OPENRISC_FEATURE_OB32S = (1 << 5), | |
214 | OPENRISC_FEATURE_OB64S = (1 << 6), | |
215 | OPENRISC_FEATURE_OF32S = (1 << 7), | |
216 | OPENRISC_FEATURE_OF64S = (1 << 8), | |
217 | OPENRISC_FEATURE_OV64S = (1 << 9), | |
218 | }; | |
219 | ||
726fe045 JL |
220 | /* TLB size */ |
221 | enum { | |
222 | DTLB_WAYS = 1, | |
223 | DTLB_SIZE = 64, | |
224 | DTLB_MASK = (DTLB_SIZE-1), | |
225 | ITLB_WAYS = 1, | |
226 | ITLB_SIZE = 64, | |
227 | ITLB_MASK = (ITLB_SIZE-1), | |
228 | }; | |
229 | ||
230 | /* TLB prot */ | |
231 | enum { | |
232 | URE = (1 << 6), | |
233 | UWE = (1 << 7), | |
234 | SRE = (1 << 8), | |
235 | SWE = (1 << 9), | |
236 | ||
237 | SXE = (1 << 6), | |
238 | UXE = (1 << 7), | |
239 | }; | |
240 | ||
241 | /* check if tlb available */ | |
242 | enum { | |
243 | TLBRET_INVALID = -3, | |
244 | TLBRET_NOMATCH = -2, | |
245 | TLBRET_BADADDR = -1, | |
246 | TLBRET_MATCH = 0 | |
247 | }; | |
248 | ||
249 | typedef struct OpenRISCTLBEntry { | |
250 | uint32_t mr; | |
251 | uint32_t tr; | |
252 | } OpenRISCTLBEntry; | |
253 | ||
254 | #ifndef CONFIG_USER_ONLY | |
255 | typedef struct CPUOpenRISCTLBContext { | |
256 | OpenRISCTLBEntry itlb[ITLB_WAYS][ITLB_SIZE]; | |
257 | OpenRISCTLBEntry dtlb[DTLB_WAYS][DTLB_SIZE]; | |
258 | ||
259 | int (*cpu_openrisc_map_address_code)(struct OpenRISCCPU *cpu, | |
260 | target_phys_addr_t *physical, | |
261 | int *prot, | |
262 | target_ulong address, int rw); | |
263 | int (*cpu_openrisc_map_address_data)(struct OpenRISCCPU *cpu, | |
264 | target_phys_addr_t *physical, | |
265 | int *prot, | |
266 | target_ulong address, int rw); | |
267 | } CPUOpenRISCTLBContext; | |
268 | #endif | |
269 | ||
e67db06e JL |
270 | typedef struct CPUOpenRISCState { |
271 | target_ulong gpr[32]; /* General registers */ | |
272 | target_ulong pc; /* Program counter */ | |
273 | target_ulong npc; /* Next PC */ | |
274 | target_ulong ppc; /* Prev PC */ | |
275 | target_ulong jmp_pc; /* Jump PC */ | |
276 | ||
277 | target_ulong machi; /* Multiply register MACHI */ | |
278 | target_ulong maclo; /* Multiply register MACLO */ | |
279 | ||
280 | target_ulong fpmaddhi; /* Multiply and add float register FPMADDHI */ | |
281 | target_ulong fpmaddlo; /* Multiply and add float register FPMADDLO */ | |
282 | ||
283 | target_ulong epcr; /* Exception PC register */ | |
284 | target_ulong eear; /* Exception EA register */ | |
285 | ||
286 | uint32_t sr; /* Supervisor register */ | |
287 | uint32_t vr; /* Version register */ | |
288 | uint32_t upr; /* Unit presence register */ | |
289 | uint32_t cpucfgr; /* CPU configure register */ | |
290 | uint32_t dmmucfgr; /* DMMU configure register */ | |
291 | uint32_t immucfgr; /* IMMU configure register */ | |
292 | uint32_t esr; /* Exception supervisor register */ | |
293 | uint32_t fpcsr; /* Float register */ | |
294 | float_status fp_status; | |
295 | ||
296 | uint32_t flags; /* cpu_flags, we only use it for exception | |
297 | in solt so far. */ | |
298 | uint32_t btaken; /* the SR_F bit */ | |
299 | ||
300 | CPU_COMMON | |
301 | ||
302 | #ifndef CONFIG_USER_ONLY | |
726fe045 JL |
303 | CPUOpenRISCTLBContext * tlb; |
304 | ||
e67db06e JL |
305 | struct QEMUTimer *timer; |
306 | uint32_t ttmr; /* Timer tick mode register */ | |
307 | uint32_t ttcr; /* Timer tick count register */ | |
308 | ||
309 | uint32_t picmr; /* Interrupt mask register */ | |
310 | uint32_t picsr; /* Interrupt contrl register*/ | |
311 | #endif | |
312 | } CPUOpenRISCState; | |
313 | ||
314 | /** | |
315 | * OpenRISCCPU: | |
316 | * @env: #CPUOpenRISCState | |
317 | * | |
318 | * A OpenRISC CPU. | |
319 | */ | |
320 | typedef struct OpenRISCCPU { | |
321 | /*< private >*/ | |
322 | CPUState parent_obj; | |
323 | /*< public >*/ | |
324 | ||
325 | CPUOpenRISCState env; | |
326 | ||
327 | uint32_t feature; /* CPU Capabilities */ | |
328 | } OpenRISCCPU; | |
329 | ||
330 | static inline OpenRISCCPU *openrisc_env_get_cpu(CPUOpenRISCState *env) | |
331 | { | |
332 | return OPENRISC_CPU(container_of(env, OpenRISCCPU, env)); | |
333 | } | |
334 | ||
335 | #define ENV_GET_CPU(e) CPU(openrisc_env_get_cpu(e)) | |
336 | ||
337 | OpenRISCCPU *cpu_openrisc_init(const char *cpu_model); | |
338 | void openrisc_cpu_realize(Object *obj, Error **errp); | |
339 | ||
340 | void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf); | |
341 | int cpu_openrisc_exec(CPUOpenRISCState *s); | |
342 | void do_interrupt(CPUOpenRISCState *env); | |
343 | void openrisc_translate_init(void); | |
726fe045 JL |
344 | int cpu_openrisc_handle_mmu_fault(CPUOpenRISCState *env, |
345 | target_ulong address, | |
346 | int rw, int mmu_idx); | |
e67db06e JL |
347 | |
348 | #define cpu_list cpu_openrisc_list | |
349 | #define cpu_exec cpu_openrisc_exec | |
350 | #define cpu_gen_code cpu_openrisc_gen_code | |
726fe045 | 351 | #define cpu_handle_mmu_fault cpu_openrisc_handle_mmu_fault |
e67db06e JL |
352 | |
353 | #ifndef CONFIG_USER_ONLY | |
354 | void cpu_openrisc_mmu_init(OpenRISCCPU *cpu); | |
726fe045 JL |
355 | int cpu_openrisc_get_phys_nommu(OpenRISCCPU *cpu, |
356 | target_phys_addr_t *physical, | |
357 | int *prot, target_ulong address, int rw); | |
358 | int cpu_openrisc_get_phys_code(OpenRISCCPU *cpu, | |
359 | target_phys_addr_t *physical, | |
360 | int *prot, target_ulong address, int rw); | |
361 | int cpu_openrisc_get_phys_data(OpenRISCCPU *cpu, | |
362 | target_phys_addr_t *physical, | |
363 | int *prot, target_ulong address, int rw); | |
e67db06e JL |
364 | #endif |
365 | ||
366 | static inline CPUOpenRISCState *cpu_init(const char *cpu_model) | |
367 | { | |
368 | OpenRISCCPU *cpu = cpu_openrisc_init(cpu_model); | |
369 | if (cpu) { | |
370 | return &cpu->env; | |
371 | } | |
372 | return NULL; | |
373 | } | |
374 | ||
375 | #include "cpu-all.h" | |
376 | ||
377 | static inline void cpu_get_tb_cpu_state(CPUOpenRISCState *env, | |
378 | target_ulong *pc, | |
379 | target_ulong *cs_base, int *flags) | |
380 | { | |
381 | *pc = env->pc; | |
382 | *cs_base = 0; | |
383 | /* D_FLAG -- branch instruction exception */ | |
384 | *flags = (env->flags & D_FLAG); | |
385 | } | |
386 | ||
387 | static inline int cpu_mmu_index(CPUOpenRISCState *env) | |
388 | { | |
726fe045 JL |
389 | if (!(env->sr & SR_IME)) { |
390 | return MMU_NOMMU_IDX; | |
391 | } | |
392 | return (env->sr & SR_SM) == 0 ? MMU_USER_IDX : MMU_SUPERVISOR_IDX; | |
e67db06e JL |
393 | } |
394 | ||
395 | static inline bool cpu_has_work(CPUOpenRISCState *env) | |
396 | { | |
397 | return true; | |
398 | } | |
399 | ||
400 | #include "exec-all.h" | |
401 | ||
402 | static inline target_ulong cpu_get_pc(CPUOpenRISCState *env) | |
403 | { | |
404 | return env->pc; | |
405 | } | |
406 | ||
407 | static inline void cpu_pc_from_tb(CPUOpenRISCState *env, TranslationBlock *tb) | |
408 | { | |
409 | env->pc = tb->pc; | |
410 | } | |
411 | ||
412 | #endif /* CPU_OPENRISC_H */ |