1 /*
2 * SH4 emulation
3 *
4 * Copyright (c) 2005 Samuel Tardieu
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 2.1 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 SH4_CPU_H
21 #define SH4_CPU_H
22
23 #include "cpu-qom.h"
24 #include "exec/cpu-defs.h"
25 #include "qemu/cpu-float.h"
26
27 /* CPU Subtypes */
28 #define SH_CPU_SH7750 (1 << 0)
29 #define SH_CPU_SH7750S (1 << 1)
30 #define SH_CPU_SH7750R (1 << 2)
31 #define SH_CPU_SH7751 (1 << 3)
32 #define SH_CPU_SH7751R (1 << 4)
33 #define SH_CPU_SH7785 (1 << 5)
34 #define SH_CPU_SH7750_ALL (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7750R)
35 #define SH_CPU_SH7751_ALL (SH_CPU_SH7751 | SH_CPU_SH7751R)
36
37 #define SR_MD 30
38 #define SR_RB 29
39 #define SR_BL 28
40 #define SR_FD 15
41 #define SR_M 9
42 #define SR_Q 8
43 #define SR_I3 7
44 #define SR_I2 6
45 #define SR_I1 5
46 #define SR_I0 4
47 #define SR_S 1
48 #define SR_T 0
49
50 #define FPSCR_MASK (0x003fffff)
51 #define FPSCR_FR (1 << 21)
52 #define FPSCR_SZ (1 << 20)
53 #define FPSCR_PR (1 << 19)
54 #define FPSCR_DN (1 << 18)
55 #define FPSCR_CAUSE_MASK (0x3f << 12)
56 #define FPSCR_CAUSE_SHIFT (12)
57 #define FPSCR_CAUSE_E (1 << 17)
58 #define FPSCR_CAUSE_V (1 << 16)
59 #define FPSCR_CAUSE_Z (1 << 15)
60 #define FPSCR_CAUSE_O (1 << 14)
61 #define FPSCR_CAUSE_U (1 << 13)
62 #define FPSCR_CAUSE_I (1 << 12)
63 #define FPSCR_ENABLE_MASK (0x1f << 7)
64 #define FPSCR_ENABLE_SHIFT (7)
65 #define FPSCR_ENABLE_V (1 << 11)
66 #define FPSCR_ENABLE_Z (1 << 10)
67 #define FPSCR_ENABLE_O (1 << 9)
68 #define FPSCR_ENABLE_U (1 << 8)
69 #define FPSCR_ENABLE_I (1 << 7)
70 #define FPSCR_FLAG_MASK (0x1f << 2)
71 #define FPSCR_FLAG_SHIFT (2)
72 #define FPSCR_FLAG_V (1 << 6)
73 #define FPSCR_FLAG_Z (1 << 5)
74 #define FPSCR_FLAG_O (1 << 4)
75 #define FPSCR_FLAG_U (1 << 3)
76 #define FPSCR_FLAG_I (1 << 2)
77 #define FPSCR_RM_MASK (0x03 << 0)
78 #define FPSCR_RM_NEAREST (0 << 0)
79 #define FPSCR_RM_ZERO (1 << 0)
80
81 #define TB_FLAG_DELAY_SLOT (1 << 0)
82 #define TB_FLAG_DELAY_SLOT_COND (1 << 1)
83 #define TB_FLAG_DELAY_SLOT_RTE (1 << 2)
84 #define TB_FLAG_PENDING_MOVCA (1 << 3)
85 #define TB_FLAG_GUSA_SHIFT 4 /* [11:4] */
86 #define TB_FLAG_GUSA_EXCLUSIVE (1 << 12)
87 #define TB_FLAG_UNALIGN (1 << 13)
88 #define TB_FLAG_SR_FD (1 << SR_FD) /* 15 */
89 #define TB_FLAG_FPSCR_PR FPSCR_PR /* 19 */
90 #define TB_FLAG_FPSCR_SZ FPSCR_SZ /* 20 */
91 #define TB_FLAG_FPSCR_FR FPSCR_FR /* 21 */
92 #define TB_FLAG_SR_RB (1 << SR_RB) /* 29 */
93 #define TB_FLAG_SR_MD (1 << SR_MD) /* 30 */
94
95 #define TB_FLAG_DELAY_SLOT_MASK (TB_FLAG_DELAY_SLOT | \
96 TB_FLAG_DELAY_SLOT_COND | \
97 TB_FLAG_DELAY_SLOT_RTE)
98 #define TB_FLAG_GUSA_MASK ((0xff << TB_FLAG_GUSA_SHIFT) | \
99 TB_FLAG_GUSA_EXCLUSIVE)
100 #define TB_FLAG_FPSCR_MASK (TB_FLAG_FPSCR_PR | \
101 TB_FLAG_FPSCR_SZ | \
102 TB_FLAG_FPSCR_FR)
103 #define TB_FLAG_SR_MASK (TB_FLAG_SR_FD | \
104 TB_FLAG_SR_RB | \
105 TB_FLAG_SR_MD)
106 #define TB_FLAG_ENVFLAGS_MASK (TB_FLAG_DELAY_SLOT_MASK | \
107 TB_FLAG_GUSA_MASK)
108
109 typedef struct tlb_t {
110 uint32_t vpn; /* virtual page number */
111 uint32_t ppn; /* physical page number */
112 uint32_t size; /* mapped page size in bytes */
113 uint8_t asid; /* address space identifier */
114 uint8_t v:1; /* validity */
115 uint8_t sz:2; /* page size */
116 uint8_t sh:1; /* share status */
117 uint8_t c:1; /* cacheability */
118 uint8_t pr:2; /* protection key */
119 uint8_t d:1; /* dirty */
120 uint8_t wt:1; /* write through */
121 uint8_t sa:3; /* space attribute (PCMCIA) */
122 uint8_t tc:1; /* timing control */
123 } tlb_t;
124
125 #define UTLB_SIZE 64
126 #define ITLB_SIZE 4
127
128 #define TARGET_INSN_START_EXTRA_WORDS 1
129
130 enum sh_features {
131 SH_FEATURE_SH4A = 1,
132 SH_FEATURE_BCR3_AND_BCR4 = 2,
133 };
134
135 typedef struct memory_content {
136 uint32_t address;
137 uint32_t value;
138 struct memory_content *next;
139 } memory_content;
140
141 typedef struct CPUArchState {
142 uint32_t flags; /* general execution flags */
143 uint32_t gregs[24]; /* general registers */
144 float32 fregs[32]; /* floating point registers */
145 uint32_t sr; /* status register (with T split out) */
146 uint32_t sr_m; /* M bit of status register */
147 uint32_t sr_q; /* Q bit of status register */
148 uint32_t sr_t; /* T bit of status register */
149 uint32_t ssr; /* saved status register */
150 uint32_t spc; /* saved program counter */
151 uint32_t gbr; /* global base register */
152 uint32_t vbr; /* vector base register */
153 uint32_t sgr; /* saved global register 15 */
154 uint32_t dbr; /* debug base register */
155 uint32_t pc; /* program counter */
156 uint32_t delayed_pc; /* target of delayed branch */
157 uint32_t delayed_cond; /* condition of delayed branch */
158 uint32_t pr; /* procedure register */
159 uint32_t fpscr; /* floating point status/control register */
160 uint32_t fpul; /* floating point communication register */
161
162 /* multiply and accumulate: high, low and combined. */
163 union {
164 uint64_t mac;
165 struct {
166 #if HOST_BIG_ENDIAN
167 uint32_t mach, macl;
168 #else
169 uint32_t macl, mach;
170 #endif
171 };
172 };
173
174 /* float point status register */
175 float_status fp_status;
176
177 /* Those belong to the specific unit (SH7750) but are handled here */
178 uint32_t mmucr; /* MMU control register */
179 uint32_t pteh; /* page table entry high register */
180 uint32_t ptel; /* page table entry low register */
181 uint32_t ptea; /* page table entry assistance register */
182 uint32_t ttb; /* translation table base register */
183 uint32_t tea; /* TLB exception address register */
184 uint32_t tra; /* TRAPA exception register */
185 uint32_t expevt; /* exception event register */
186 uint32_t intevt; /* interrupt event register */
187
188 tlb_t itlb[ITLB_SIZE]; /* instruction translation table */
189 tlb_t utlb[UTLB_SIZE]; /* unified translation table */
190
191 /* LDST = LOCK_ADDR != -1. */
192 uint32_t lock_addr;
193 uint32_t lock_value;
194
195 /* Fields up to this point are cleared by a CPU reset */
196 struct {} end_reset_fields;
197
198 /* Fields from here on are preserved over CPU reset. */
199 int id; /* CPU model */
200
201 /* The features that we should emulate. See sh_features above. */
202 uint32_t features;
203
204 void *intc_handle;
205 int in_sleep; /* SR_BL ignored during sleep */
206 memory_content *movcal_backup;
207 memory_content **movcal_backup_tail;
208 } CPUSH4State;
209
210 /**
211 * SuperHCPU:
212 * @env: #CPUSH4State
213 *
214 * A SuperH CPU.
215 */
216 struct ArchCPU {
217 CPUState parent_obj;
218
219 CPUSH4State env;
220 };
221
222 /**
223 * SuperHCPUClass:
224 * @parent_realize: The parent class' realize handler.
225 * @parent_phases: The parent class' reset phase handlers.
226 * @pvr: Processor Version Register
227 * @prr: Processor Revision Register
228 * @cvr: Cache Version Register
229 *
230 * A SuperH CPU model.
231 */
232 struct SuperHCPUClass {
233 CPUClass parent_class;
234
235 DeviceRealize parent_realize;
236 ResettablePhases parent_phases;
237
238 uint32_t pvr;
239 uint32_t prr;
240 uint32_t cvr;
241 };
242
243 void superh_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
244 int superh_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
245 int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
246 G_NORETURN void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
247 MMUAccessType access_type, int mmu_idx,
248 uintptr_t retaddr);
249
250 void sh4_translate_init(void);
251
252 #if !defined(CONFIG_USER_ONLY)
253 hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
254 bool superh_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
255 MMUAccessType access_type, int mmu_idx,
256 bool probe, uintptr_t retaddr);
257 void superh_cpu_do_interrupt(CPUState *cpu);
258 bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
259 void cpu_sh4_invalidate_tlb(CPUSH4State *s);
260 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
261 hwaddr addr);
262 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
263 uint32_t mem_value);
264 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
265 hwaddr addr);
266 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
267 uint32_t mem_value);
268 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
269 hwaddr addr);
270 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
271 uint32_t mem_value);
272 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
273 hwaddr addr);
274 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
275 uint32_t mem_value);
276 #endif
277
278 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);
279
280 void cpu_load_tlb(CPUSH4State * env);
281
282 #define CPU_RESOLVING_TYPE TYPE_SUPERH_CPU
283
284 /* MMU modes definitions */
285 #define MMU_USER_IDX 1
286
287 #include "exec/cpu-all.h"
288
289 /* MMU control register */
290 #define MMUCR 0x1F000010
291 #define MMUCR_AT (1<<0)
292 #define MMUCR_TI (1<<2)
293 #define MMUCR_SV (1<<8)
294 #define MMUCR_URC_BITS (6)
295 #define MMUCR_URC_OFFSET (10)
296 #define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
297 #define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
cpu_mmucr_urc(uint32_t mmucr)298 static inline int cpu_mmucr_urc (uint32_t mmucr)
299 {
300 return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
301 }
302
303 /* PTEH : Page Translation Entry High register */
304 #define PTEH_ASID_BITS (8)
305 #define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
306 #define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
307 #define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
308 #define PTEH_VPN_BITS (22)
309 #define PTEH_VPN_OFFSET (10)
310 #define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
311 #define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
cpu_pteh_vpn(uint32_t pteh)312 static inline int cpu_pteh_vpn (uint32_t pteh)
313 {
314 return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
315 }
316
317 /* PTEL : Page Translation Entry Low register */
318 #define PTEL_V (1 << 8)
319 #define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
320 #define PTEL_C (1 << 3)
321 #define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
322 #define PTEL_D (1 << 2)
323 #define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
324 #define PTEL_SH (1 << 1)
325 #define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
326 #define PTEL_WT (1 << 0)
327 #define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)
328
329 #define PTEL_SZ_HIGH_OFFSET (7)
330 #define PTEL_SZ_HIGH (1 << PTEL_SZ_HIGH_OFFSET)
331 #define PTEL_SZ_LOW_OFFSET (4)
332 #define PTEL_SZ_LOW (1 << PTEL_SZ_LOW_OFFSET)
cpu_ptel_sz(uint32_t ptel)333 static inline int cpu_ptel_sz (uint32_t ptel)
334 {
335 int sz;
336 sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
337 sz <<= 1;
338 sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
339 return sz;
340 }
341
342 #define PTEL_PPN_BITS (19)
343 #define PTEL_PPN_OFFSET (10)
344 #define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
345 #define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
cpu_ptel_ppn(uint32_t ptel)346 static inline int cpu_ptel_ppn (uint32_t ptel)
347 {
348 return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
349 }
350
351 #define PTEL_PR_BITS (2)
352 #define PTEL_PR_OFFSET (5)
353 #define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
354 #define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
cpu_ptel_pr(uint32_t ptel)355 static inline int cpu_ptel_pr (uint32_t ptel)
356 {
357 return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
358 }
359
360 /* PTEA : Page Translation Entry Assistance register */
361 #define PTEA_SA_BITS (3)
362 #define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
363 #define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
364 #define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
365 #define PTEA_TC (1 << 3)
366 #define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)
367
cpu_read_sr(CPUSH4State * env)368 static inline target_ulong cpu_read_sr(CPUSH4State *env)
369 {
370 return env->sr | (env->sr_m << SR_M) |
371 (env->sr_q << SR_Q) |
372 (env->sr_t << SR_T);
373 }
374
cpu_write_sr(CPUSH4State * env,target_ulong sr)375 static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr)
376 {
377 env->sr_m = (sr >> SR_M) & 1;
378 env->sr_q = (sr >> SR_Q) & 1;
379 env->sr_t = (sr >> SR_T) & 1;
380 env->sr = sr & ~((1u << SR_M) | (1u << SR_Q) | (1u << SR_T));
381 }
382
cpu_get_tb_cpu_state(CPUSH4State * env,vaddr * pc,uint64_t * cs_base,uint32_t * flags)383 static inline void cpu_get_tb_cpu_state(CPUSH4State *env, vaddr *pc,
384 uint64_t *cs_base, uint32_t *flags)
385 {
386 *pc = env->pc;
387 /* For a gUSA region, notice the end of the region. */
388 *cs_base = env->flags & TB_FLAG_GUSA_MASK ? env->gregs[0] : 0;
389 *flags = env->flags
390 | (env->fpscr & TB_FLAG_FPSCR_MASK)
391 | (env->sr & TB_FLAG_SR_MASK)
392 | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 3 */
393 #ifdef CONFIG_USER_ONLY
394 *flags |= TB_FLAG_UNALIGN * !env_cpu(env)->prctl_unalign_sigbus;
395 #endif
396 }
397
398 #endif /* SH4_CPU_H */
399