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.
31 #define TARGET_LONG_BITS 32
32 #define ELF_MACHINE EM_XTENSA
34 #define CPUArchState struct CPUXtensaState
37 #include "qemu-common.h"
39 #include "fpu/softfloat.h"
41 #define TARGET_HAS_ICE 1
43 #define NB_MMU_MODES 4
45 #define TARGET_PHYS_ADDR_SPACE_BITS 32
46 #define TARGET_VIRT_ADDR_SPACE_BITS 32
47 #define TARGET_PAGE_BITS 12
50 /* Additional instructions */
51 XTENSA_OPTION_CODE_DENSITY,
53 XTENSA_OPTION_EXTENDED_L32R,
54 XTENSA_OPTION_16_BIT_IMUL,
55 XTENSA_OPTION_32_BIT_IMUL,
56 XTENSA_OPTION_32_BIT_IMUL_HIGH,
57 XTENSA_OPTION_32_BIT_IDIV,
59 XTENSA_OPTION_MISC_OP_NSA,
60 XTENSA_OPTION_MISC_OP_MINMAX,
61 XTENSA_OPTION_MISC_OP_SEXT,
62 XTENSA_OPTION_MISC_OP_CLAMPS,
63 XTENSA_OPTION_COPROCESSOR,
64 XTENSA_OPTION_BOOLEAN,
65 XTENSA_OPTION_FP_COPROCESSOR,
66 XTENSA_OPTION_MP_SYNCHRO,
67 XTENSA_OPTION_CONDITIONAL_STORE,
69 /* Interrupts and exceptions */
70 XTENSA_OPTION_EXCEPTION,
71 XTENSA_OPTION_RELOCATABLE_VECTOR,
72 XTENSA_OPTION_UNALIGNED_EXCEPTION,
73 XTENSA_OPTION_INTERRUPT,
74 XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
75 XTENSA_OPTION_TIMER_INTERRUPT,
79 XTENSA_OPTION_ICACHE_TEST,
80 XTENSA_OPTION_ICACHE_INDEX_LOCK,
82 XTENSA_OPTION_DCACHE_TEST,
83 XTENSA_OPTION_DCACHE_INDEX_LOCK,
89 XTENSA_OPTION_HW_ALIGNMENT,
90 XTENSA_OPTION_MEMORY_ECC_PARITY,
92 /* Memory protection and translation */
93 XTENSA_OPTION_REGION_PROTECTION,
94 XTENSA_OPTION_REGION_TRANSLATION,
98 XTENSA_OPTION_WINDOWED_REGISTER,
99 XTENSA_OPTION_PROCESSOR_INTERFACE,
100 XTENSA_OPTION_MISC_SR,
101 XTENSA_OPTION_THREAD_POINTER,
102 XTENSA_OPTION_PROCESSOR_ID,
104 XTENSA_OPTION_TRACE_PORT,
154 #define PS_INTLEVEL 0xf
155 #define PS_INTLEVEL_SHIFT 0
161 #define PS_RING_SHIFT 6
164 #define PS_OWB_SHIFT 8
166 #define PS_CALLINC 0x30000
167 #define PS_CALLINC_SHIFT 16
168 #define PS_CALLINC_LEN 2
170 #define PS_WOE 0x40000
172 #define DEBUGCAUSE_IC 0x1
173 #define DEBUGCAUSE_IB 0x2
174 #define DEBUGCAUSE_DB 0x4
175 #define DEBUGCAUSE_BI 0x8
176 #define DEBUGCAUSE_BN 0x10
177 #define DEBUGCAUSE_DI 0x20
178 #define DEBUGCAUSE_DBNUM 0xf00
179 #define DEBUGCAUSE_DBNUM_SHIFT 8
181 #define DBREAKC_SB 0x80000000
182 #define DBREAKC_LB 0x40000000
183 #define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
184 #define DBREAKC_MASK 0x3f
187 #define MAX_NINTERRUPT 32
190 #define MAX_NCCOMPARE 3
191 #define MAX_TLB_WAY_SIZE 8
192 #define MAX_NDBREAK 2
194 #define REGION_PAGE_MASK 0xe0000000
201 /* Dynamic vectors */
202 EXC_WINDOW_OVERFLOW4,
203 EXC_WINDOW_UNDERFLOW4,
204 EXC_WINDOW_OVERFLOW8,
205 EXC_WINDOW_UNDERFLOW8,
206 EXC_WINDOW_OVERFLOW12,
207 EXC_WINDOW_UNDERFLOW12,
217 ILLEGAL_INSTRUCTION_CAUSE = 0,
219 INSTRUCTION_FETCH_ERROR_CAUSE,
220 LOAD_STORE_ERROR_CAUSE,
221 LEVEL1_INTERRUPT_CAUSE,
223 INTEGER_DIVIDE_BY_ZERO_CAUSE,
224 PRIVILEGED_CAUSE = 8,
225 LOAD_STORE_ALIGNMENT_CAUSE,
227 INSTR_PIF_DATA_ERROR_CAUSE = 12,
228 LOAD_STORE_PIF_DATA_ERROR_CAUSE,
229 INSTR_PIF_ADDR_ERROR_CAUSE,
230 LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
233 INST_TLB_MULTI_HIT_CAUSE,
234 INST_FETCH_PRIVILEGE_CAUSE,
235 INST_FETCH_PROHIBITED_CAUSE = 20,
236 LOAD_STORE_TLB_MISS_CAUSE = 24,
237 LOAD_STORE_TLB_MULTI_HIT_CAUSE,
238 LOAD_STORE_PRIVILEGE_CAUSE,
239 LOAD_PROHIBITED_CAUSE = 28,
240 STORE_PROHIBITED_CAUSE,
242 COPROCESSOR0_DISABLED = 32,
256 typedef struct xtensa_tlb_entry {
264 typedef struct xtensa_tlb {
266 const unsigned way_size[10];
268 unsigned nrefillentries;
271 typedef struct XtensaGdbReg {
277 typedef struct XtensaGdbRegmap {
280 /* PC + a + ar + sr + ur */
281 XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
284 typedef struct XtensaConfig {
287 XtensaGdbRegmap gdb_regmap;
292 uint32_t exception_vector[EXC_MAX];
295 uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
296 uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
297 uint32_t inttype_mask[INTTYPE_MAX];
300 interrupt_type inttype;
301 } interrupt[MAX_NINTERRUPT];
303 uint32_t timerint[MAX_NCCOMPARE];
305 unsigned extint[MAX_NINTERRUPT];
307 unsigned debug_level;
311 uint32_t clock_freq_khz;
317 typedef struct XtensaConfigList {
318 const XtensaConfig *config;
319 struct XtensaConfigList *next;
322 typedef struct CPUXtensaState {
323 const XtensaConfig *config;
328 uint32_t phys_regs[MAX_NAREG];
330 float_status fp_status;
332 xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
333 xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
334 unsigned autorefill_idx;
336 int pending_irq_level; /* level of last raised IRQ */
338 QEMUTimer *ccompare_timer;
339 uint32_t wake_ccount;
344 /* Watchpoints for DBREAK registers */
345 CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
352 #define cpu_exec cpu_xtensa_exec
353 #define cpu_gen_code cpu_xtensa_gen_code
354 #define cpu_signal_handler cpu_xtensa_signal_handler
355 #define cpu_list xtensa_cpu_list
357 #ifdef TARGET_WORDS_BIGENDIAN
358 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
360 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
363 XtensaCPU *cpu_xtensa_init(const char *cpu_model);
365 static inline CPUXtensaState *cpu_init(const char *cpu_model)
367 XtensaCPU *cpu = cpu_xtensa_init(cpu_model);
374 void xtensa_translate_init(void);
375 int cpu_xtensa_exec(CPUXtensaState *s);
376 void xtensa_register_core(XtensaConfigList *node);
377 void do_interrupt(CPUXtensaState *s);
378 void check_interrupts(CPUXtensaState *s);
379 void xtensa_irq_init(CPUXtensaState *env);
380 void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
381 void xtensa_advance_ccount(CPUXtensaState *env, uint32_t d);
382 void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
383 void xtensa_rearm_ccompare_timer(CPUXtensaState *env);
384 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
385 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
386 void xtensa_sync_window_from_phys(CPUXtensaState *env);
387 void xtensa_sync_phys_from_window(CPUXtensaState *env);
388 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env, bool dtlb, uint32_t way);
389 void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
390 uint32_t *vpn, uint32_t wi, uint32_t *ei);
391 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
392 uint32_t *pwi, uint32_t *pei, uint8_t *pring);
393 void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
394 xtensa_tlb_entry *entry, bool dtlb,
395 unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
396 void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
397 unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
398 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
399 uint32_t vaddr, int is_write, int mmu_idx,
400 uint32_t *paddr, uint32_t *page_size, unsigned *access);
401 void reset_mmu(CPUXtensaState *env);
402 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
403 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
406 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
408 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
411 return (config->options & opt) != 0;
414 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
416 return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
419 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
421 int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
422 if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
423 level = env->config->excm_level;
428 static inline int xtensa_get_ring(const CPUXtensaState *env)
430 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
431 return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
437 static inline int xtensa_get_cring(const CPUXtensaState *env)
439 if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
440 (env->sregs[PS] & PS_EXCM) == 0) {
441 return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
447 static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
448 bool dtlb, unsigned wi, unsigned ei)
455 /* MMU modes definitions */
456 #define MMU_MODE0_SUFFIX _ring0
457 #define MMU_MODE1_SUFFIX _ring1
458 #define MMU_MODE2_SUFFIX _ring2
459 #define MMU_MODE3_SUFFIX _ring3
461 static inline int cpu_mmu_index(CPUXtensaState *env)
463 return xtensa_get_cring(env);
466 #define XTENSA_TBFLAG_RING_MASK 0x3
467 #define XTENSA_TBFLAG_EXCM 0x4
468 #define XTENSA_TBFLAG_LITBASE 0x8
469 #define XTENSA_TBFLAG_DEBUG 0x10
470 #define XTENSA_TBFLAG_ICOUNT 0x20
471 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
472 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
474 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
475 target_ulong *cs_base, int *flags)
480 *flags |= xtensa_get_ring(env);
481 if (env->sregs[PS] & PS_EXCM) {
482 *flags |= XTENSA_TBFLAG_EXCM;
484 if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
485 (env->sregs[LITBASE] & 1)) {
486 *flags |= XTENSA_TBFLAG_LITBASE;
488 if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
489 if (xtensa_get_cintlevel(env) < env->config->debug_level) {
490 *flags |= XTENSA_TBFLAG_DEBUG;
492 if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
493 *flags |= XTENSA_TBFLAG_ICOUNT;
496 if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
497 *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
502 #include "exec-all.h"
504 static inline int cpu_has_work(CPUXtensaState *env)
506 return env->pending_irq_level;
509 static inline void cpu_pc_from_tb(CPUXtensaState *env, TranslationBlock *tb)