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,
272 typedef struct xtensa_tlb_entry {
280 typedef struct xtensa_tlb {
282 const unsigned way_size[10];
284 unsigned nrefillentries;
287 typedef struct XtensaGdbReg {
293 typedef struct XtensaGdbRegmap {
296 /* PC + a + ar + sr + ur */
297 XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
300 typedef struct XtensaConfig {
303 XtensaGdbRegmap gdb_regmap;
308 uint32_t exception_vector[EXC_MAX];
311 uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
312 uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
313 uint32_t inttype_mask[INTTYPE_MAX];
316 interrupt_type inttype;
317 } interrupt[MAX_NINTERRUPT];
319 uint32_t timerint[MAX_NCCOMPARE];
321 unsigned extint[MAX_NINTERRUPT];
323 unsigned debug_level;
327 uint32_t configid[2];
329 uint32_t clock_freq_khz;
335 typedef struct XtensaConfigList {
336 const XtensaConfig *config;
337 struct XtensaConfigList *next;
340 typedef struct CPUXtensaState {
341 const XtensaConfig *config;
346 uint32_t phys_regs[MAX_NAREG];
348 float_status fp_status;
350 xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
351 xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
352 unsigned autorefill_idx;
354 int pending_irq_level; /* level of last raised IRQ */
356 QEMUTimer *ccompare_timer;
357 uint32_t wake_ccount;
362 /* Watchpoints for DBREAK registers */
363 struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
370 #define cpu_exec cpu_xtensa_exec
371 #define cpu_gen_code cpu_xtensa_gen_code
372 #define cpu_signal_handler cpu_xtensa_signal_handler
373 #define cpu_list xtensa_cpu_list
375 #ifdef TARGET_WORDS_BIGENDIAN
376 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
378 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
381 XtensaCPU *cpu_xtensa_init(const char *cpu_model);
383 static inline CPUXtensaState *cpu_init(const char *cpu_model)
385 XtensaCPU *cpu = cpu_xtensa_init(cpu_model);
392 void xtensa_translate_init(void);
393 void xtensa_breakpoint_handler(CPUState *cs);
394 int cpu_xtensa_exec(CPUXtensaState *s);
395 void xtensa_register_core(XtensaConfigList *node);
396 void check_interrupts(CPUXtensaState *s);
397 void xtensa_irq_init(CPUXtensaState *env);
398 void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
399 void xtensa_advance_ccount(CPUXtensaState *env, uint32_t d);
400 void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
401 void xtensa_rearm_ccompare_timer(CPUXtensaState *env);
402 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
403 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
404 void xtensa_sync_window_from_phys(CPUXtensaState *env);
405 void xtensa_sync_phys_from_window(CPUXtensaState *env);
406 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env, bool dtlb, uint32_t way);
407 void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
408 uint32_t *vpn, uint32_t wi, uint32_t *ei);
409 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
410 uint32_t *pwi, uint32_t *pei, uint8_t *pring);
411 void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
412 xtensa_tlb_entry *entry, bool dtlb,
413 unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
414 void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
415 unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
416 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
417 uint32_t vaddr, int is_write, int mmu_idx,
418 uint32_t *paddr, uint32_t *page_size, unsigned *access);
419 void reset_mmu(CPUXtensaState *env);
420 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
421 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
424 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
425 #define XTENSA_OPTION_ALL (~(uint64_t)0)
427 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
430 return (config->options & opt) != 0;
433 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
435 return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
438 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
440 int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
441 if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
442 level = env->config->excm_level;
447 static inline int xtensa_get_ring(const CPUXtensaState *env)
449 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
450 return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
456 static inline int xtensa_get_cring(const CPUXtensaState *env)
458 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
459 (env->sregs[PS] & PS_EXCM) == 0) {
460 return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
466 static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
467 bool dtlb, unsigned wi, unsigned ei)
474 /* MMU modes definitions */
475 #define MMU_MODE0_SUFFIX _ring0
476 #define MMU_MODE1_SUFFIX _ring1
477 #define MMU_MODE2_SUFFIX _ring2
478 #define MMU_MODE3_SUFFIX _ring3
480 static inline int cpu_mmu_index(CPUXtensaState *env)
482 return xtensa_get_cring(env);
485 #define XTENSA_TBFLAG_RING_MASK 0x3
486 #define XTENSA_TBFLAG_EXCM 0x4
487 #define XTENSA_TBFLAG_LITBASE 0x8
488 #define XTENSA_TBFLAG_DEBUG 0x10
489 #define XTENSA_TBFLAG_ICOUNT 0x20
490 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
491 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
492 #define XTENSA_TBFLAG_EXCEPTION 0x4000
494 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
495 target_ulong *cs_base, int *flags)
497 CPUState *cs = CPU(xtensa_env_get_cpu(env));
502 *flags |= xtensa_get_ring(env);
503 if (env->sregs[PS] & PS_EXCM) {
504 *flags |= XTENSA_TBFLAG_EXCM;
506 if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
507 (env->sregs[LITBASE] & 1)) {
508 *flags |= XTENSA_TBFLAG_LITBASE;
510 if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
511 if (xtensa_get_cintlevel(env) < env->config->debug_level) {
512 *flags |= XTENSA_TBFLAG_DEBUG;
514 if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
515 *flags |= XTENSA_TBFLAG_ICOUNT;
518 if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
519 *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
521 if (cs->singlestep_enabled && env->exception_taken) {
522 *flags |= XTENSA_TBFLAG_EXCEPTION;
526 #include "exec/cpu-all.h"
527 #include "exec/exec-all.h"