2 * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the Open Source and Linux Lab nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #define TARGET_LONG_BITS 32
33 #define ELF_MACHINE EM_XTENSA
35 #define CPUArchState struct CPUXtensaState
38 #include "qemu-common.h"
39 #include "exec/cpu-defs.h"
40 #include "fpu/softfloat.h"
42 #define TARGET_HAS_ICE 1
44 #define NB_MMU_MODES 4
46 #define TARGET_PHYS_ADDR_SPACE_BITS 32
47 #define TARGET_VIRT_ADDR_SPACE_BITS 32
48 #define TARGET_PAGE_BITS 12
51 /* Additional instructions */
52 XTENSA_OPTION_CODE_DENSITY
,
54 XTENSA_OPTION_EXTENDED_L32R
,
55 XTENSA_OPTION_16_BIT_IMUL
,
56 XTENSA_OPTION_32_BIT_IMUL
,
57 XTENSA_OPTION_32_BIT_IMUL_HIGH
,
58 XTENSA_OPTION_32_BIT_IDIV
,
60 XTENSA_OPTION_MISC_OP_NSA
,
61 XTENSA_OPTION_MISC_OP_MINMAX
,
62 XTENSA_OPTION_MISC_OP_SEXT
,
63 XTENSA_OPTION_MISC_OP_CLAMPS
,
64 XTENSA_OPTION_COPROCESSOR
,
65 XTENSA_OPTION_BOOLEAN
,
66 XTENSA_OPTION_FP_COPROCESSOR
,
67 XTENSA_OPTION_MP_SYNCHRO
,
68 XTENSA_OPTION_CONDITIONAL_STORE
,
69 XTENSA_OPTION_ATOMCTL
,
71 /* Interrupts and exceptions */
72 XTENSA_OPTION_EXCEPTION
,
73 XTENSA_OPTION_RELOCATABLE_VECTOR
,
74 XTENSA_OPTION_UNALIGNED_EXCEPTION
,
75 XTENSA_OPTION_INTERRUPT
,
76 XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT
,
77 XTENSA_OPTION_TIMER_INTERRUPT
,
81 XTENSA_OPTION_ICACHE_TEST
,
82 XTENSA_OPTION_ICACHE_INDEX_LOCK
,
84 XTENSA_OPTION_DCACHE_TEST
,
85 XTENSA_OPTION_DCACHE_INDEX_LOCK
,
91 XTENSA_OPTION_HW_ALIGNMENT
,
92 XTENSA_OPTION_MEMORY_ECC_PARITY
,
94 /* Memory protection and translation */
95 XTENSA_OPTION_REGION_PROTECTION
,
96 XTENSA_OPTION_REGION_TRANSLATION
,
98 XTENSA_OPTION_CACHEATTR
,
101 XTENSA_OPTION_WINDOWED_REGISTER
,
102 XTENSA_OPTION_PROCESSOR_INTERFACE
,
103 XTENSA_OPTION_MISC_SR
,
104 XTENSA_OPTION_THREAD_POINTER
,
105 XTENSA_OPTION_PROCESSOR_ID
,
107 XTENSA_OPTION_TRACE_PORT
,
162 #define PS_INTLEVEL 0xf
163 #define PS_INTLEVEL_SHIFT 0
169 #define PS_RING_SHIFT 6
172 #define PS_OWB_SHIFT 8
174 #define PS_CALLINC 0x30000
175 #define PS_CALLINC_SHIFT 16
176 #define PS_CALLINC_LEN 2
178 #define PS_WOE 0x40000
180 #define DEBUGCAUSE_IC 0x1
181 #define DEBUGCAUSE_IB 0x2
182 #define DEBUGCAUSE_DB 0x4
183 #define DEBUGCAUSE_BI 0x8
184 #define DEBUGCAUSE_BN 0x10
185 #define DEBUGCAUSE_DI 0x20
186 #define DEBUGCAUSE_DBNUM 0xf00
187 #define DEBUGCAUSE_DBNUM_SHIFT 8
189 #define DBREAKC_SB 0x80000000
190 #define DBREAKC_LB 0x40000000
191 #define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
192 #define DBREAKC_MASK 0x3f
195 #define MAX_NINTERRUPT 32
198 #define MAX_NCCOMPARE 3
199 #define MAX_TLB_WAY_SIZE 8
200 #define MAX_NDBREAK 2
202 #define REGION_PAGE_MASK 0xe0000000
204 #define PAGE_CACHE_MASK 0x700
205 #define PAGE_CACHE_SHIFT 8
206 #define PAGE_CACHE_INVALID 0x000
207 #define PAGE_CACHE_BYPASS 0x100
208 #define PAGE_CACHE_WT 0x200
209 #define PAGE_CACHE_WB 0x400
210 #define PAGE_CACHE_ISOLATE 0x600
217 /* Dynamic vectors */
218 EXC_WINDOW_OVERFLOW4
,
219 EXC_WINDOW_UNDERFLOW4
,
220 EXC_WINDOW_OVERFLOW8
,
221 EXC_WINDOW_UNDERFLOW8
,
222 EXC_WINDOW_OVERFLOW12
,
223 EXC_WINDOW_UNDERFLOW12
,
233 ILLEGAL_INSTRUCTION_CAUSE
= 0,
235 INSTRUCTION_FETCH_ERROR_CAUSE
,
236 LOAD_STORE_ERROR_CAUSE
,
237 LEVEL1_INTERRUPT_CAUSE
,
239 INTEGER_DIVIDE_BY_ZERO_CAUSE
,
240 PRIVILEGED_CAUSE
= 8,
241 LOAD_STORE_ALIGNMENT_CAUSE
,
243 INSTR_PIF_DATA_ERROR_CAUSE
= 12,
244 LOAD_STORE_PIF_DATA_ERROR_CAUSE
,
245 INSTR_PIF_ADDR_ERROR_CAUSE
,
246 LOAD_STORE_PIF_ADDR_ERROR_CAUSE
,
249 INST_TLB_MULTI_HIT_CAUSE
,
250 INST_FETCH_PRIVILEGE_CAUSE
,
251 INST_FETCH_PROHIBITED_CAUSE
= 20,
252 LOAD_STORE_TLB_MISS_CAUSE
= 24,
253 LOAD_STORE_TLB_MULTI_HIT_CAUSE
,
254 LOAD_STORE_PRIVILEGE_CAUSE
,
255 LOAD_PROHIBITED_CAUSE
= 28,
256 STORE_PROHIBITED_CAUSE
,
258 COPROCESSOR0_DISABLED
= 32,
273 typedef struct xtensa_tlb_entry
{
281 typedef struct xtensa_tlb
{
283 const unsigned way_size
[10];
285 unsigned nrefillentries
;
288 typedef struct XtensaGdbReg
{
294 typedef struct XtensaGdbRegmap
{
297 /* PC + a + ar + sr + ur */
298 XtensaGdbReg reg
[1 + 16 + 64 + 256 + 256];
301 typedef struct XtensaConfig
{
304 XtensaGdbRegmap gdb_regmap
;
309 uint32_t exception_vector
[EXC_MAX
];
312 uint32_t interrupt_vector
[MAX_NLEVEL
+ MAX_NNMI
+ 1];
313 uint32_t level_mask
[MAX_NLEVEL
+ MAX_NNMI
+ 1];
314 uint32_t inttype_mask
[INTTYPE_MAX
];
317 interrupt_type inttype
;
318 } interrupt
[MAX_NINTERRUPT
];
320 uint32_t timerint
[MAX_NCCOMPARE
];
322 unsigned extint
[MAX_NINTERRUPT
];
324 unsigned debug_level
;
328 uint32_t configid
[2];
330 uint32_t clock_freq_khz
;
336 typedef struct XtensaConfigList
{
337 const XtensaConfig
*config
;
338 struct XtensaConfigList
*next
;
341 typedef struct CPUXtensaState
{
342 const XtensaConfig
*config
;
347 uint32_t phys_regs
[MAX_NAREG
];
349 float_status fp_status
;
351 xtensa_tlb_entry itlb
[7][MAX_TLB_WAY_SIZE
];
352 xtensa_tlb_entry dtlb
[10][MAX_TLB_WAY_SIZE
];
353 unsigned autorefill_idx
;
355 int pending_irq_level
; /* level of last raised IRQ */
357 QEMUTimer
*ccompare_timer
;
358 uint32_t wake_ccount
;
363 /* Watchpoints for DBREAK registers */
364 struct CPUWatchpoint
*cpu_watchpoint
[MAX_NDBREAK
];
371 #define cpu_exec cpu_xtensa_exec
372 #define cpu_gen_code cpu_xtensa_gen_code
373 #define cpu_signal_handler cpu_xtensa_signal_handler
374 #define cpu_list xtensa_cpu_list
376 #ifdef TARGET_WORDS_BIGENDIAN
377 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
379 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
382 XtensaCPU
*cpu_xtensa_init(const char *cpu_model
);
384 static inline CPUXtensaState
*cpu_init(const char *cpu_model
)
386 XtensaCPU
*cpu
= cpu_xtensa_init(cpu_model
);
393 void xtensa_translate_init(void);
394 void xtensa_breakpoint_handler(CPUState
*cs
);
395 int cpu_xtensa_exec(CPUXtensaState
*s
);
396 void xtensa_register_core(XtensaConfigList
*node
);
397 void check_interrupts(CPUXtensaState
*s
);
398 void xtensa_irq_init(CPUXtensaState
*env
);
399 void *xtensa_get_extint(CPUXtensaState
*env
, unsigned extint
);
400 void xtensa_advance_ccount(CPUXtensaState
*env
, uint32_t d
);
401 void xtensa_timer_irq(CPUXtensaState
*env
, uint32_t id
, uint32_t active
);
402 void xtensa_rearm_ccompare_timer(CPUXtensaState
*env
);
403 int cpu_xtensa_signal_handler(int host_signum
, void *pinfo
, void *puc
);
404 void xtensa_cpu_list(FILE *f
, fprintf_function cpu_fprintf
);
405 void xtensa_sync_window_from_phys(CPUXtensaState
*env
);
406 void xtensa_sync_phys_from_window(CPUXtensaState
*env
);
407 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState
*env
, bool dtlb
, uint32_t way
);
408 void split_tlb_entry_spec_way(const CPUXtensaState
*env
, uint32_t v
, bool dtlb
,
409 uint32_t *vpn
, uint32_t wi
, uint32_t *ei
);
410 int xtensa_tlb_lookup(const CPUXtensaState
*env
, uint32_t addr
, bool dtlb
,
411 uint32_t *pwi
, uint32_t *pei
, uint8_t *pring
);
412 void xtensa_tlb_set_entry_mmu(const CPUXtensaState
*env
,
413 xtensa_tlb_entry
*entry
, bool dtlb
,
414 unsigned wi
, unsigned ei
, uint32_t vpn
, uint32_t pte
);
415 void xtensa_tlb_set_entry(CPUXtensaState
*env
, bool dtlb
,
416 unsigned wi
, unsigned ei
, uint32_t vpn
, uint32_t pte
);
417 int xtensa_get_physical_addr(CPUXtensaState
*env
, bool update_tlb
,
418 uint32_t vaddr
, int is_write
, int mmu_idx
,
419 uint32_t *paddr
, uint32_t *page_size
, unsigned *access
);
420 void reset_mmu(CPUXtensaState
*env
);
421 void dump_mmu(FILE *f
, fprintf_function cpu_fprintf
, CPUXtensaState
*env
);
422 void debug_exception_env(CPUXtensaState
*new_env
, uint32_t cause
);
425 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
426 #define XTENSA_OPTION_ALL (~(uint64_t)0)
428 static inline bool xtensa_option_bits_enabled(const XtensaConfig
*config
,
431 return (config
->options
& opt
) != 0;
434 static inline bool xtensa_option_enabled(const XtensaConfig
*config
, int opt
)
436 return xtensa_option_bits_enabled(config
, XTENSA_OPTION_BIT(opt
));
439 static inline int xtensa_get_cintlevel(const CPUXtensaState
*env
)
441 int level
= (env
->sregs
[PS
] & PS_INTLEVEL
) >> PS_INTLEVEL_SHIFT
;
442 if ((env
->sregs
[PS
] & PS_EXCM
) && env
->config
->excm_level
> level
) {
443 level
= env
->config
->excm_level
;
448 static inline int xtensa_get_ring(const CPUXtensaState
*env
)
450 if (xtensa_option_enabled(env
->config
, XTENSA_OPTION_MMU
)) {
451 return (env
->sregs
[PS
] & PS_RING
) >> PS_RING_SHIFT
;
457 static inline int xtensa_get_cring(const CPUXtensaState
*env
)
459 if (xtensa_option_enabled(env
->config
, XTENSA_OPTION_MMU
) &&
460 (env
->sregs
[PS
] & PS_EXCM
) == 0) {
461 return (env
->sregs
[PS
] & PS_RING
) >> PS_RING_SHIFT
;
467 static inline xtensa_tlb_entry
*xtensa_tlb_get_entry(CPUXtensaState
*env
,
468 bool dtlb
, unsigned wi
, unsigned ei
)
475 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState
*env
)
477 return env
->sregs
[WINDOW_START
] |
478 (env
->sregs
[WINDOW_START
] << env
->config
->nareg
/ 4);
481 /* MMU modes definitions */
482 #define MMU_MODE0_SUFFIX _ring0
483 #define MMU_MODE1_SUFFIX _ring1
484 #define MMU_MODE2_SUFFIX _ring2
485 #define MMU_MODE3_SUFFIX _ring3
487 static inline int cpu_mmu_index(CPUXtensaState
*env
)
489 return xtensa_get_cring(env
);
492 #define XTENSA_TBFLAG_RING_MASK 0x3
493 #define XTENSA_TBFLAG_EXCM 0x4
494 #define XTENSA_TBFLAG_LITBASE 0x8
495 #define XTENSA_TBFLAG_DEBUG 0x10
496 #define XTENSA_TBFLAG_ICOUNT 0x20
497 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
498 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
499 #define XTENSA_TBFLAG_EXCEPTION 0x4000
500 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
501 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
503 static inline void cpu_get_tb_cpu_state(CPUXtensaState
*env
, target_ulong
*pc
,
504 target_ulong
*cs_base
, int *flags
)
506 CPUState
*cs
= CPU(xtensa_env_get_cpu(env
));
511 *flags
|= xtensa_get_ring(env
);
512 if (env
->sregs
[PS
] & PS_EXCM
) {
513 *flags
|= XTENSA_TBFLAG_EXCM
;
515 if (xtensa_option_enabled(env
->config
, XTENSA_OPTION_EXTENDED_L32R
) &&
516 (env
->sregs
[LITBASE
] & 1)) {
517 *flags
|= XTENSA_TBFLAG_LITBASE
;
519 if (xtensa_option_enabled(env
->config
, XTENSA_OPTION_DEBUG
)) {
520 if (xtensa_get_cintlevel(env
) < env
->config
->debug_level
) {
521 *flags
|= XTENSA_TBFLAG_DEBUG
;
523 if (xtensa_get_cintlevel(env
) < env
->sregs
[ICOUNTLEVEL
]) {
524 *flags
|= XTENSA_TBFLAG_ICOUNT
;
527 if (xtensa_option_enabled(env
->config
, XTENSA_OPTION_COPROCESSOR
)) {
528 *flags
|= env
->sregs
[CPENABLE
] << XTENSA_TBFLAG_CPENABLE_SHIFT
;
530 if (cs
->singlestep_enabled
&& env
->exception_taken
) {
531 *flags
|= XTENSA_TBFLAG_EXCEPTION
;
533 if (xtensa_option_enabled(env
->config
, XTENSA_OPTION_WINDOWED_REGISTER
) &&
534 (env
->sregs
[PS
] & (PS_WOE
| PS_EXCM
)) == PS_WOE
) {
535 uint32_t windowstart
= xtensa_replicate_windowstart(env
) >>
536 (env
->sregs
[WINDOW_BASE
] + 1);
537 uint32_t w
= ctz32(windowstart
| 0x8);
539 *flags
|= w
<< XTENSA_TBFLAG_WINDOW_SHIFT
;
541 *flags
|= 3 << XTENSA_TBFLAG_WINDOW_SHIFT
;
545 #include "exec/cpu-all.h"
546 #include "exec/exec-all.h"