xref: /qemu/target/xtensa/cpu.h (revision 80de5f24)
1 /*
2  * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
3  * All rights reserved.
4  *
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.
15  *
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.
26  */
27 
28 #ifndef XTENSA_CPU_H
29 #define XTENSA_CPU_H
30 
31 #include "cpu-qom.h"
32 #include "qemu/cpu-float.h"
33 #include "exec/cpu-defs.h"
34 #include "hw/clock.h"
35 #include "xtensa-isa.h"
36 
37 enum {
38     /* Additional instructions */
39     XTENSA_OPTION_CODE_DENSITY,
40     XTENSA_OPTION_LOOP,
41     XTENSA_OPTION_EXTENDED_L32R,
42     XTENSA_OPTION_16_BIT_IMUL,
43     XTENSA_OPTION_32_BIT_IMUL,
44     XTENSA_OPTION_32_BIT_IMUL_HIGH,
45     XTENSA_OPTION_32_BIT_IDIV,
46     XTENSA_OPTION_MAC16,
47     XTENSA_OPTION_MISC_OP_NSA,
48     XTENSA_OPTION_MISC_OP_MINMAX,
49     XTENSA_OPTION_MISC_OP_SEXT,
50     XTENSA_OPTION_MISC_OP_CLAMPS,
51     XTENSA_OPTION_COPROCESSOR,
52     XTENSA_OPTION_BOOLEAN,
53     XTENSA_OPTION_FP_COPROCESSOR,
54     XTENSA_OPTION_DFP_COPROCESSOR,
55     XTENSA_OPTION_DFPU_SINGLE_ONLY,
56     XTENSA_OPTION_MP_SYNCHRO,
57     XTENSA_OPTION_CONDITIONAL_STORE,
58     XTENSA_OPTION_ATOMCTL,
59     XTENSA_OPTION_DEPBITS,
60 
61     /* Interrupts and exceptions */
62     XTENSA_OPTION_EXCEPTION,
63     XTENSA_OPTION_RELOCATABLE_VECTOR,
64     XTENSA_OPTION_UNALIGNED_EXCEPTION,
65     XTENSA_OPTION_INTERRUPT,
66     XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
67     XTENSA_OPTION_TIMER_INTERRUPT,
68 
69     /* Local memory */
70     XTENSA_OPTION_ICACHE,
71     XTENSA_OPTION_ICACHE_TEST,
72     XTENSA_OPTION_ICACHE_INDEX_LOCK,
73     XTENSA_OPTION_DCACHE,
74     XTENSA_OPTION_DCACHE_TEST,
75     XTENSA_OPTION_DCACHE_INDEX_LOCK,
76     XTENSA_OPTION_IRAM,
77     XTENSA_OPTION_IROM,
78     XTENSA_OPTION_DRAM,
79     XTENSA_OPTION_DROM,
80     XTENSA_OPTION_XLMI,
81     XTENSA_OPTION_HW_ALIGNMENT,
82     XTENSA_OPTION_MEMORY_ECC_PARITY,
83 
84     /* Memory protection and translation */
85     XTENSA_OPTION_REGION_PROTECTION,
86     XTENSA_OPTION_REGION_TRANSLATION,
87     XTENSA_OPTION_MPU,
88     XTENSA_OPTION_MMU,
89     XTENSA_OPTION_CACHEATTR,
90 
91     /* Other */
92     XTENSA_OPTION_WINDOWED_REGISTER,
93     XTENSA_OPTION_PROCESSOR_INTERFACE,
94     XTENSA_OPTION_MISC_SR,
95     XTENSA_OPTION_THREAD_POINTER,
96     XTENSA_OPTION_PROCESSOR_ID,
97     XTENSA_OPTION_DEBUG,
98     XTENSA_OPTION_TRACE_PORT,
99     XTENSA_OPTION_EXTERN_REGS,
100 };
101 
102 enum {
103     EXPSTATE = 230,
104     THREADPTR = 231,
105     FCR = 232,
106     FSR = 233,
107 };
108 
109 enum {
110     LBEG = 0,
111     LEND = 1,
112     LCOUNT = 2,
113     SAR = 3,
114     BR = 4,
115     LITBASE = 5,
116     SCOMPARE1 = 12,
117     ACCLO = 16,
118     ACCHI = 17,
119     MR = 32,
120     PREFCTL = 40,
121     WINDOW_BASE = 72,
122     WINDOW_START = 73,
123     PTEVADDR = 83,
124     MMID = 89,
125     RASID = 90,
126     MPUENB = 90,
127     ITLBCFG = 91,
128     DTLBCFG = 92,
129     MPUCFG = 92,
130     ERACCESS = 95,
131     IBREAKENABLE = 96,
132     MEMCTL = 97,
133     CACHEATTR = 98,
134     CACHEADRDIS = 98,
135     ATOMCTL = 99,
136     DDR = 104,
137     MEPC = 106,
138     MEPS = 107,
139     MESAVE = 108,
140     MESR = 109,
141     MECR = 110,
142     MEVADDR = 111,
143     IBREAKA = 128,
144     DBREAKA = 144,
145     DBREAKC = 160,
146     CONFIGID0 = 176,
147     EPC1 = 177,
148     DEPC = 192,
149     EPS2 = 194,
150     CONFIGID1 = 208,
151     EXCSAVE1 = 209,
152     CPENABLE = 224,
153     INTSET = 226,
154     INTCLEAR = 227,
155     INTENABLE = 228,
156     PS = 230,
157     VECBASE = 231,
158     EXCCAUSE = 232,
159     DEBUGCAUSE = 233,
160     CCOUNT = 234,
161     PRID = 235,
162     ICOUNT = 236,
163     ICOUNTLEVEL = 237,
164     EXCVADDR = 238,
165     CCOMPARE = 240,
166     MISC = 244,
167 };
168 
169 #define PS_INTLEVEL 0xf
170 #define PS_INTLEVEL_SHIFT 0
171 
172 #define PS_EXCM 0x10
173 #define PS_UM 0x20
174 
175 #define PS_RING 0xc0
176 #define PS_RING_SHIFT 6
177 
178 #define PS_OWB 0xf00
179 #define PS_OWB_SHIFT 8
180 #define PS_OWB_LEN 4
181 
182 #define PS_CALLINC 0x30000
183 #define PS_CALLINC_SHIFT 16
184 #define PS_CALLINC_LEN 2
185 
186 #define PS_WOE 0x40000
187 
188 #define DEBUGCAUSE_IC 0x1
189 #define DEBUGCAUSE_IB 0x2
190 #define DEBUGCAUSE_DB 0x4
191 #define DEBUGCAUSE_BI 0x8
192 #define DEBUGCAUSE_BN 0x10
193 #define DEBUGCAUSE_DI 0x20
194 #define DEBUGCAUSE_DBNUM 0xf00
195 #define DEBUGCAUSE_DBNUM_SHIFT 8
196 
197 #define DBREAKC_SB 0x80000000
198 #define DBREAKC_LB 0x40000000
199 #define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
200 #define DBREAKC_MASK 0x3f
201 
202 #define MEMCTL_INIT 0x00800000
203 #define MEMCTL_IUSEWAYS_SHIFT 18
204 #define MEMCTL_IUSEWAYS_LEN 5
205 #define MEMCTL_IUSEWAYS_MASK 0x007c0000
206 #define MEMCTL_DALLOCWAYS_SHIFT 13
207 #define MEMCTL_DALLOCWAYS_LEN 5
208 #define MEMCTL_DALLOCWAYS_MASK 0x0003e000
209 #define MEMCTL_DUSEWAYS_SHIFT 8
210 #define MEMCTL_DUSEWAYS_LEN 5
211 #define MEMCTL_DUSEWAYS_MASK 0x00001f00
212 #define MEMCTL_ISNP 0x4
213 #define MEMCTL_DSNP 0x2
214 #define MEMCTL_IL0EN 0x1
215 
216 #define MAX_INSN_LENGTH 64
217 #define MAX_INSNBUF_LENGTH \
218     ((MAX_INSN_LENGTH + sizeof(xtensa_insnbuf_word) - 1) / \
219      sizeof(xtensa_insnbuf_word))
220 #define MAX_INSN_SLOTS 32
221 #define MAX_OPCODE_ARGS 16
222 #define MAX_NAREG 64
223 #define MAX_NINTERRUPT 32
224 #define MAX_NLEVEL 6
225 #define MAX_NNMI 1
226 #define MAX_NCCOMPARE 3
227 #define MAX_TLB_WAY_SIZE 8
228 #define MAX_NDBREAK 2
229 #define MAX_NIBREAK 2
230 #define MAX_NMEMORY 4
231 #define MAX_MPU_FOREGROUND_SEGMENTS 32
232 
233 #define REGION_PAGE_MASK 0xe0000000
234 
235 #define PAGE_CACHE_MASK    0x700
236 #define PAGE_CACHE_SHIFT   8
237 #define PAGE_CACHE_INVALID 0x000
238 #define PAGE_CACHE_BYPASS  0x100
239 #define PAGE_CACHE_WT      0x200
240 #define PAGE_CACHE_WB      0x400
241 #define PAGE_CACHE_ISOLATE 0x600
242 
243 enum {
244     /* Static vectors */
245     EXC_RESET0,
246     EXC_RESET1,
247     EXC_MEMORY_ERROR,
248 
249     /* Dynamic vectors */
250     EXC_WINDOW_OVERFLOW4,
251     EXC_WINDOW_UNDERFLOW4,
252     EXC_WINDOW_OVERFLOW8,
253     EXC_WINDOW_UNDERFLOW8,
254     EXC_WINDOW_OVERFLOW12,
255     EXC_WINDOW_UNDERFLOW12,
256     EXC_IRQ,
257     EXC_KERNEL,
258     EXC_USER,
259     EXC_DOUBLE,
260     EXC_DEBUG,
261     EXC_MAX
262 };
263 
264 enum {
265     ILLEGAL_INSTRUCTION_CAUSE = 0,
266     SYSCALL_CAUSE,
267     INSTRUCTION_FETCH_ERROR_CAUSE,
268     LOAD_STORE_ERROR_CAUSE,
269     LEVEL1_INTERRUPT_CAUSE,
270     ALLOCA_CAUSE,
271     INTEGER_DIVIDE_BY_ZERO_CAUSE,
272     PC_VALUE_ERROR_CAUSE,
273     PRIVILEGED_CAUSE,
274     LOAD_STORE_ALIGNMENT_CAUSE,
275     EXTERNAL_REG_PRIVILEGE_CAUSE,
276     EXCLUSIVE_ERROR_CAUSE,
277     INSTR_PIF_DATA_ERROR_CAUSE,
278     LOAD_STORE_PIF_DATA_ERROR_CAUSE,
279     INSTR_PIF_ADDR_ERROR_CAUSE,
280     LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
281     INST_TLB_MISS_CAUSE,
282     INST_TLB_MULTI_HIT_CAUSE,
283     INST_FETCH_PRIVILEGE_CAUSE,
284     INST_FETCH_PROHIBITED_CAUSE = 20,
285     LOAD_STORE_TLB_MISS_CAUSE = 24,
286     LOAD_STORE_TLB_MULTI_HIT_CAUSE,
287     LOAD_STORE_PRIVILEGE_CAUSE,
288     LOAD_PROHIBITED_CAUSE = 28,
289     STORE_PROHIBITED_CAUSE,
290 
291     COPROCESSOR0_DISABLED = 32,
292 };
293 
294 typedef enum {
295     INTTYPE_LEVEL,
296     INTTYPE_EDGE,
297     INTTYPE_NMI,
298     INTTYPE_SOFTWARE,
299     INTTYPE_TIMER,
300     INTTYPE_DEBUG,
301     INTTYPE_WRITE_ERR,
302     INTTYPE_PROFILING,
303     INTTYPE_IDMA_DONE,
304     INTTYPE_IDMA_ERR,
305     INTTYPE_GS_ERR,
306     INTTYPE_MAX
307 } interrupt_type;
308 
309 typedef struct CPUArchState CPUXtensaState;
310 
311 typedef struct xtensa_tlb_entry {
312     uint32_t vaddr;
313     uint32_t paddr;
314     uint8_t asid;
315     uint8_t attr;
316     bool variable;
317 } xtensa_tlb_entry;
318 
319 typedef struct xtensa_tlb {
320     unsigned nways;
321     const unsigned way_size[10];
322     bool varway56;
323     unsigned nrefillentries;
324 } xtensa_tlb;
325 
326 typedef struct xtensa_mpu_entry {
327     uint32_t vaddr;
328     uint32_t attr;
329 } xtensa_mpu_entry;
330 
331 typedef struct XtensaGdbReg {
332     int targno;
333     unsigned flags;
334     int type;
335     int group;
336     unsigned size;
337 } XtensaGdbReg;
338 
339 typedef struct XtensaGdbRegmap {
340     int num_regs;
341     int num_core_regs;
342     /* PC + a + ar + sr + ur */
343     XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
344 } XtensaGdbRegmap;
345 
346 typedef struct XtensaCcompareTimer {
347     CPUXtensaState *env;
348     QEMUTimer *timer;
349 } XtensaCcompareTimer;
350 
351 typedef struct XtensaMemory {
352     unsigned num;
353     struct XtensaMemoryRegion {
354         uint32_t addr;
355         uint32_t size;
356     } location[MAX_NMEMORY];
357 } XtensaMemory;
358 
359 typedef struct opcode_arg {
360     uint32_t imm;
361     uint32_t raw_imm;
362     void *in;
363     void *out;
364     uint32_t num_bits;
365 } OpcodeArg;
366 
367 typedef struct DisasContext DisasContext;
368 typedef void (*XtensaOpcodeOp)(DisasContext *dc, const OpcodeArg arg[],
369                                const uint32_t par[]);
370 typedef uint32_t (*XtensaOpcodeUintTest)(DisasContext *dc,
371                                          const OpcodeArg arg[],
372                                          const uint32_t par[]);
373 
374 enum {
375     XTENSA_OP_ILL = 0x1,
376     XTENSA_OP_PRIVILEGED = 0x2,
377     XTENSA_OP_SYSCALL = 0x4,
378     XTENSA_OP_DEBUG_BREAK = 0x8,
379 
380     XTENSA_OP_OVERFLOW = 0x10,
381     XTENSA_OP_UNDERFLOW = 0x20,
382     XTENSA_OP_ALLOCA = 0x40,
383     XTENSA_OP_COPROCESSOR = 0x80,
384 
385     XTENSA_OP_DIVIDE_BY_ZERO = 0x100,
386 
387     /* Postprocessing flags */
388     XTENSA_OP_CHECK_INTERRUPTS = 0x200,
389     XTENSA_OP_EXIT_TB_M1 = 0x400,
390     XTENSA_OP_EXIT_TB_0 = 0x800,
391     XTENSA_OP_SYNC_REGISTER_WINDOW = 0x1000,
392 
393     XTENSA_OP_POSTPROCESS =
394         XTENSA_OP_CHECK_INTERRUPTS |
395         XTENSA_OP_EXIT_TB_M1 |
396         XTENSA_OP_EXIT_TB_0 |
397         XTENSA_OP_SYNC_REGISTER_WINDOW,
398 
399     XTENSA_OP_NAME_ARRAY = 0x8000,
400 
401     XTENSA_OP_CONTROL_FLOW = 0x10000,
402     XTENSA_OP_STORE = 0x20000,
403     XTENSA_OP_LOAD = 0x40000,
404     XTENSA_OP_LOAD_STORE =
405         XTENSA_OP_LOAD | XTENSA_OP_STORE,
406 };
407 
408 typedef struct XtensaOpcodeOps {
409     const void *name;
410     XtensaOpcodeOp translate;
411     XtensaOpcodeUintTest test_exceptions;
412     XtensaOpcodeUintTest test_overflow;
413     const uint32_t *par;
414     uint32_t op_flags;
415     uint32_t coprocessor;
416 } XtensaOpcodeOps;
417 
418 typedef struct XtensaOpcodeTranslators {
419     unsigned num_opcodes;
420     const XtensaOpcodeOps *opcode;
421 } XtensaOpcodeTranslators;
422 
423 extern const XtensaOpcodeTranslators xtensa_core_opcodes;
424 extern const XtensaOpcodeTranslators xtensa_fpu2000_opcodes;
425 extern const XtensaOpcodeTranslators xtensa_fpu_opcodes;
426 
427 typedef struct XtensaConfig {
428     const char *name;
429     uint64_t options;
430     XtensaGdbRegmap gdb_regmap;
431     unsigned nareg;
432     int excm_level;
433     int ndepc;
434     unsigned inst_fetch_width;
435     unsigned max_insn_size;
436     uint32_t vecbase;
437     uint32_t exception_vector[EXC_MAX];
438     unsigned ninterrupt;
439     unsigned nlevel;
440     unsigned nmi_level;
441     uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
442     uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
443     uint32_t inttype_mask[INTTYPE_MAX];
444     struct {
445         uint32_t level;
446         interrupt_type inttype;
447     } interrupt[MAX_NINTERRUPT];
448     unsigned nccompare;
449     uint32_t timerint[MAX_NCCOMPARE];
450     unsigned nextint;
451     unsigned extint[MAX_NINTERRUPT];
452 
453     unsigned debug_level;
454     unsigned nibreak;
455     unsigned ndbreak;
456 
457     unsigned icache_ways;
458     unsigned dcache_ways;
459     unsigned dcache_line_bytes;
460     uint32_t memctl_mask;
461 
462     XtensaMemory instrom;
463     XtensaMemory instram;
464     XtensaMemory datarom;
465     XtensaMemory dataram;
466     XtensaMemory sysrom;
467     XtensaMemory sysram;
468 
469     unsigned hw_version;
470     uint32_t configid[2];
471 
472     void *isa_internal;
473     xtensa_isa isa;
474     XtensaOpcodeOps **opcode_ops;
475     const XtensaOpcodeTranslators **opcode_translators;
476     xtensa_regfile a_regfile;
477     void ***regfile;
478 
479     uint32_t clock_freq_khz;
480 
481     xtensa_tlb itlb;
482     xtensa_tlb dtlb;
483 
484     uint32_t mpu_align;
485     unsigned n_mpu_fg_segments;
486     unsigned n_mpu_bg_segments;
487     const xtensa_mpu_entry *mpu_bg;
488 
489     bool use_first_nan;
490 } XtensaConfig;
491 
492 typedef struct XtensaConfigList {
493     const XtensaConfig *config;
494     struct XtensaConfigList *next;
495 } XtensaConfigList;
496 
497 #if HOST_BIG_ENDIAN
498 enum {
499     FP_F32_HIGH,
500     FP_F32_LOW,
501 };
502 #else
503 enum {
504     FP_F32_LOW,
505     FP_F32_HIGH,
506 };
507 #endif
508 
509 struct CPUArchState {
510     const XtensaConfig *config;
511     uint32_t regs[16];
512     uint32_t pc;
513     uint32_t sregs[256];
514     uint32_t uregs[256];
515     uint32_t phys_regs[MAX_NAREG];
516     union {
517         float32 f32[2];
518         float64 f64;
519     } fregs[16];
520     float_status fp_status;
521     uint32_t windowbase_next;
522     uint32_t exclusive_addr;
523     uint32_t exclusive_val;
524 
525 #ifndef CONFIG_USER_ONLY
526     xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
527     xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
528     xtensa_mpu_entry mpu_fg[MAX_MPU_FOREGROUND_SEGMENTS];
529     unsigned autorefill_idx;
530     bool runstall;
531     AddressSpace *address_space_er;
532     MemoryRegion *system_er;
533     int pending_irq_level; /* level of last raised IRQ */
534     qemu_irq *irq_inputs;
535     qemu_irq ext_irq_inputs[MAX_NINTERRUPT];
536     qemu_irq runstall_irq;
537     XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
538     uint64_t time_base;
539     uint64_t ccount_time;
540     uint32_t ccount_base;
541 #endif
542 
543     int yield_needed;
544     unsigned static_vectors;
545 
546     /* Watchpoints for DBREAK registers */
547     struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
548     /* Breakpoints for IBREAK registers */
549     struct CPUBreakpoint *cpu_breakpoint[MAX_NIBREAK];
550 };
551 
552 /**
553  * XtensaCPU:
554  * @env: #CPUXtensaState
555  *
556  * An Xtensa CPU.
557  */
558 struct ArchCPU {
559     CPUState parent_obj;
560 
561     CPUXtensaState env;
562     Clock *clock;
563 };
564 
565 /**
566  * XtensaCPUClass:
567  * @parent_realize: The parent class' realize handler.
568  * @parent_phases: The parent class' reset phase handlers.
569  * @config: The CPU core configuration.
570  *
571  * An Xtensa CPU model.
572  */
573 struct XtensaCPUClass {
574     CPUClass parent_class;
575 
576     DeviceRealize parent_realize;
577     ResettablePhases parent_phases;
578 
579     const XtensaConfig *config;
580 };
581 
582 #ifndef CONFIG_USER_ONLY
583 bool xtensa_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
584                          MMUAccessType access_type, int mmu_idx,
585                          bool probe, uintptr_t retaddr);
586 void xtensa_cpu_do_interrupt(CPUState *cpu);
587 bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
588 void xtensa_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
589                                       unsigned size, MMUAccessType access_type,
590                                       int mmu_idx, MemTxAttrs attrs,
591                                       MemTxResult response, uintptr_t retaddr);
592 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
593 bool xtensa_debug_check_breakpoint(CPUState *cs);
594 #endif
595 void xtensa_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
596 void xtensa_count_regs(const XtensaConfig *config,
597                        unsigned *n_regs, unsigned *n_core_regs);
598 int xtensa_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
599 int xtensa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
600 G_NORETURN void xtensa_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
601                                                MMUAccessType access_type, int mmu_idx,
602                                                uintptr_t retaddr);
603 
604 #define CPU_RESOLVING_TYPE TYPE_XTENSA_CPU
605 
606 #if TARGET_BIG_ENDIAN
607 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
608 #define XTENSA_DEFAULT_CPU_NOMMU_MODEL "fsf"
609 #else
610 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
611 #define XTENSA_DEFAULT_CPU_NOMMU_MODEL "de212"
612 #endif
613 #define XTENSA_DEFAULT_CPU_TYPE \
614     XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_MODEL)
615 #define XTENSA_DEFAULT_CPU_NOMMU_TYPE \
616     XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_NOMMU_MODEL)
617 
618 void xtensa_collect_sr_names(const XtensaConfig *config);
619 void xtensa_translate_init(void);
620 void **xtensa_get_regfile_by_name(const char *name, int entries, int bits);
621 void xtensa_breakpoint_handler(CPUState *cs);
622 void xtensa_register_core(XtensaConfigList *node);
623 void xtensa_sim_open_console(Chardev *chr);
624 void check_interrupts(CPUXtensaState *s);
625 void xtensa_irq_init(CPUXtensaState *env);
626 qemu_irq *xtensa_get_extints(CPUXtensaState *env);
627 qemu_irq xtensa_get_runstall(CPUXtensaState *env);
628 void xtensa_sync_window_from_phys(CPUXtensaState *env);
629 void xtensa_sync_phys_from_window(CPUXtensaState *env);
630 void xtensa_rotate_window(CPUXtensaState *env, uint32_t delta);
631 void xtensa_restore_owb(CPUXtensaState *env);
632 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
633 
xtensa_select_static_vectors(CPUXtensaState * env,unsigned n)634 static inline void xtensa_select_static_vectors(CPUXtensaState *env,
635                                                 unsigned n)
636 {
637     assert(n < 2);
638     env->static_vectors = n;
639 }
640 void xtensa_runstall(CPUXtensaState *env, bool runstall);
641 
642 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
643 #define XTENSA_OPTION_ALL (~(uint64_t)0)
644 
xtensa_option_bits_enabled(const XtensaConfig * config,uint64_t opt)645 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
646         uint64_t opt)
647 {
648     return (config->options & opt) != 0;
649 }
650 
xtensa_option_enabled(const XtensaConfig * config,int opt)651 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
652 {
653     return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
654 }
655 
xtensa_get_cintlevel(const CPUXtensaState * env)656 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
657 {
658     int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
659     if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
660         level = env->config->excm_level;
661     }
662     return level;
663 }
664 
xtensa_get_ring(const CPUXtensaState * env)665 static inline int xtensa_get_ring(const CPUXtensaState *env)
666 {
667     if (xtensa_option_bits_enabled(env->config,
668                                    XTENSA_OPTION_BIT(XTENSA_OPTION_MMU) |
669                                    XTENSA_OPTION_BIT(XTENSA_OPTION_MPU))) {
670         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
671     } else {
672         return 0;
673     }
674 }
675 
xtensa_get_cring(const CPUXtensaState * env)676 static inline int xtensa_get_cring(const CPUXtensaState *env)
677 {
678     if (xtensa_option_bits_enabled(env->config,
679                                    XTENSA_OPTION_BIT(XTENSA_OPTION_MMU) |
680                                    XTENSA_OPTION_BIT(XTENSA_OPTION_MPU)) &&
681         (env->sregs[PS] & PS_EXCM) == 0) {
682         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
683     } else {
684         return 0;
685     }
686 }
687 
688 #ifndef CONFIG_USER_ONLY
689 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
690         uint32_t vaddr, int is_write, int mmu_idx,
691         uint32_t *paddr, uint32_t *page_size, unsigned *access);
692 void reset_mmu(CPUXtensaState *env);
693 void dump_mmu(CPUXtensaState *env);
694 
xtensa_get_er_region(CPUXtensaState * env)695 static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
696 {
697     return env->system_er;
698 }
699 #else
700 void xtensa_set_abi_call0(void);
701 bool xtensa_abi_call0(void);
702 #endif
703 
xtensa_replicate_windowstart(CPUXtensaState * env)704 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
705 {
706     return env->sregs[WINDOW_START] |
707         (env->sregs[WINDOW_START] << env->config->nareg / 4);
708 }
709 
710 /* MMU modes definitions */
711 #define MMU_USER_IDX 3
712 
713 #define XTENSA_TBFLAG_RING_MASK 0x3
714 #define XTENSA_TBFLAG_EXCM 0x4
715 #define XTENSA_TBFLAG_LITBASE 0x8
716 #define XTENSA_TBFLAG_DEBUG 0x10
717 #define XTENSA_TBFLAG_ICOUNT 0x20
718 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
719 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
720 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
721 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
722 #define XTENSA_TBFLAG_YIELD 0x20000
723 #define XTENSA_TBFLAG_CWOE 0x40000
724 #define XTENSA_TBFLAG_CALLINC_MASK 0x180000
725 #define XTENSA_TBFLAG_CALLINC_SHIFT 19
726 
727 #define XTENSA_CSBASE_LEND_MASK 0x0000ffff
728 #define XTENSA_CSBASE_LEND_SHIFT 0
729 #define XTENSA_CSBASE_LBEG_OFF_MASK 0x00ff0000
730 #define XTENSA_CSBASE_LBEG_OFF_SHIFT 16
731 
732 #include "exec/cpu-all.h"
733 
cpu_get_tb_cpu_state(CPUXtensaState * env,vaddr * pc,uint64_t * cs_base,uint32_t * flags)734 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, vaddr *pc,
735                                         uint64_t *cs_base, uint32_t *flags)
736 {
737     *pc = env->pc;
738     *cs_base = 0;
739     *flags = 0;
740     *flags |= xtensa_get_ring(env);
741     if (env->sregs[PS] & PS_EXCM) {
742         *flags |= XTENSA_TBFLAG_EXCM;
743     } else if (xtensa_option_enabled(env->config, XTENSA_OPTION_LOOP)) {
744         target_ulong lend_dist =
745             env->sregs[LEND] - (env->pc & -(1u << TARGET_PAGE_BITS));
746 
747         /*
748          * 0 in the csbase_lend field means that there may not be a loopback
749          * for any instruction that starts inside this page. Any other value
750          * means that an instruction that ends at this offset from the page
751          * start may loop back and will need loopback code to be generated.
752          *
753          * lend_dist is 0 when LEND points to the start of the page, but
754          * no instruction that starts inside this page may end at offset 0,
755          * so it's still correct.
756          *
757          * When an instruction ends at a page boundary it may only start in
758          * the previous page. lend_dist will be encoded as TARGET_PAGE_SIZE
759          * for the TB that contains this instruction.
760          */
761         if (lend_dist < (1u << TARGET_PAGE_BITS) + env->config->max_insn_size) {
762             target_ulong lbeg_off = env->sregs[LEND] - env->sregs[LBEG];
763 
764             *cs_base = lend_dist;
765             if (lbeg_off < 256) {
766                 *cs_base |= lbeg_off << XTENSA_CSBASE_LBEG_OFF_SHIFT;
767             }
768         }
769     }
770     if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
771             (env->sregs[LITBASE] & 1)) {
772         *flags |= XTENSA_TBFLAG_LITBASE;
773     }
774     if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
775         if (xtensa_get_cintlevel(env) < env->config->debug_level) {
776             *flags |= XTENSA_TBFLAG_DEBUG;
777         }
778         if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
779             *flags |= XTENSA_TBFLAG_ICOUNT;
780         }
781     }
782     if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
783         *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
784     }
785     if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
786         (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
787         uint32_t windowstart = xtensa_replicate_windowstart(env) >>
788             (env->sregs[WINDOW_BASE] + 1);
789         uint32_t w = ctz32(windowstart | 0x8);
790 
791         *flags |= (w << XTENSA_TBFLAG_WINDOW_SHIFT) | XTENSA_TBFLAG_CWOE;
792         *flags |= extract32(env->sregs[PS], PS_CALLINC_SHIFT,
793                             PS_CALLINC_LEN) << XTENSA_TBFLAG_CALLINC_SHIFT;
794     } else {
795         *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
796     }
797     if (env->yield_needed) {
798         *flags |= XTENSA_TBFLAG_YIELD;
799     }
800 }
801 
802 XtensaCPU *xtensa_cpu_create_with_clock(const char *cpu_type,
803                                         Clock *cpu_refclk);
804 
805 /*
806  * Set the NaN propagation rule for future FPU operations:
807  * use_first is true to pick the first NaN as the result if both
808  * inputs are NaNs, false to pick the second.
809  */
810 void xtensa_use_first_nan(CPUXtensaState *env, bool use_first);
811 #endif
812