--- /dev/null
+/*
+ * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the Open Source and Linux Lab nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef CPU_XTENSA_H
+#define CPU_XTENSA_H
+
+#define ALIGNED_ONLY
+#define TARGET_LONG_BITS 32
+#define ELF_MACHINE EM_XTENSA
+
+#define CPUArchState struct CPUXtensaState
+
+#include "config.h"
+#include "qemu-common.h"
+#include "exec/cpu-defs.h"
+#include "fpu/softfloat.h"
+
+#define NB_MMU_MODES 4
+
+#define TARGET_PHYS_ADDR_SPACE_BITS 32
+#define TARGET_VIRT_ADDR_SPACE_BITS 32
+#define TARGET_PAGE_BITS 12
+
+enum {
+ /* Additional instructions */
+ XTENSA_OPTION_CODE_DENSITY,
+ XTENSA_OPTION_LOOP,
+ XTENSA_OPTION_EXTENDED_L32R,
+ XTENSA_OPTION_16_BIT_IMUL,
+ XTENSA_OPTION_32_BIT_IMUL,
+ XTENSA_OPTION_32_BIT_IMUL_HIGH,
+ XTENSA_OPTION_32_BIT_IDIV,
+ XTENSA_OPTION_MAC16,
+ XTENSA_OPTION_MISC_OP_NSA,
+ XTENSA_OPTION_MISC_OP_MINMAX,
+ XTENSA_OPTION_MISC_OP_SEXT,
+ XTENSA_OPTION_MISC_OP_CLAMPS,
+ XTENSA_OPTION_COPROCESSOR,
+ XTENSA_OPTION_BOOLEAN,
+ XTENSA_OPTION_FP_COPROCESSOR,
+ XTENSA_OPTION_MP_SYNCHRO,
+ XTENSA_OPTION_CONDITIONAL_STORE,
+ XTENSA_OPTION_ATOMCTL,
+
+ /* Interrupts and exceptions */
+ XTENSA_OPTION_EXCEPTION,
+ XTENSA_OPTION_RELOCATABLE_VECTOR,
+ XTENSA_OPTION_UNALIGNED_EXCEPTION,
+ XTENSA_OPTION_INTERRUPT,
+ XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
+ XTENSA_OPTION_TIMER_INTERRUPT,
+
+ /* Local memory */
+ XTENSA_OPTION_ICACHE,
+ XTENSA_OPTION_ICACHE_TEST,
+ XTENSA_OPTION_ICACHE_INDEX_LOCK,
+ XTENSA_OPTION_DCACHE,
+ XTENSA_OPTION_DCACHE_TEST,
+ XTENSA_OPTION_DCACHE_INDEX_LOCK,
+ XTENSA_OPTION_IRAM,
+ XTENSA_OPTION_IROM,
+ XTENSA_OPTION_DRAM,
+ XTENSA_OPTION_DROM,
+ XTENSA_OPTION_XLMI,
+ XTENSA_OPTION_HW_ALIGNMENT,
+ XTENSA_OPTION_MEMORY_ECC_PARITY,
+
+ /* Memory protection and translation */
+ XTENSA_OPTION_REGION_PROTECTION,
+ XTENSA_OPTION_REGION_TRANSLATION,
+ XTENSA_OPTION_MMU,
+ XTENSA_OPTION_CACHEATTR,
+
+ /* Other */
+ XTENSA_OPTION_WINDOWED_REGISTER,
+ XTENSA_OPTION_PROCESSOR_INTERFACE,
+ XTENSA_OPTION_MISC_SR,
+ XTENSA_OPTION_THREAD_POINTER,
+ XTENSA_OPTION_PROCESSOR_ID,
+ XTENSA_OPTION_DEBUG,
+ XTENSA_OPTION_TRACE_PORT,
+};
+
+enum {
+ THREADPTR = 231,
+ FCR = 232,
+ FSR = 233,
+};
+
+enum {
+ LBEG = 0,
+ LEND = 1,
+ LCOUNT = 2,
+ SAR = 3,
+ BR = 4,
+ LITBASE = 5,
+ SCOMPARE1 = 12,
+ ACCLO = 16,
+ ACCHI = 17,
+ MR = 32,
+ WINDOW_BASE = 72,
+ WINDOW_START = 73,
+ PTEVADDR = 83,
+ RASID = 90,
+ ITLBCFG = 91,
+ DTLBCFG = 92,
+ IBREAKENABLE = 96,
+ CACHEATTR = 98,
+ ATOMCTL = 99,
+ IBREAKA = 128,
+ DBREAKA = 144,
+ DBREAKC = 160,
+ CONFIGID0 = 176,
+ EPC1 = 177,
+ DEPC = 192,
+ EPS2 = 194,
+ CONFIGID1 = 208,
+ EXCSAVE1 = 209,
+ CPENABLE = 224,
+ INTSET = 226,
+ INTCLEAR = 227,
+ INTENABLE = 228,
+ PS = 230,
+ VECBASE = 231,
+ EXCCAUSE = 232,
+ DEBUGCAUSE = 233,
+ CCOUNT = 234,
+ PRID = 235,
+ ICOUNT = 236,
+ ICOUNTLEVEL = 237,
+ EXCVADDR = 238,
+ CCOMPARE = 240,
+ MISC = 244,
+};
+
+#define PS_INTLEVEL 0xf
+#define PS_INTLEVEL_SHIFT 0
+
+#define PS_EXCM 0x10
+#define PS_UM 0x20
+
+#define PS_RING 0xc0
+#define PS_RING_SHIFT 6
+
+#define PS_OWB 0xf00
+#define PS_OWB_SHIFT 8
+
+#define PS_CALLINC 0x30000
+#define PS_CALLINC_SHIFT 16
+#define PS_CALLINC_LEN 2
+
+#define PS_WOE 0x40000
+
+#define DEBUGCAUSE_IC 0x1
+#define DEBUGCAUSE_IB 0x2
+#define DEBUGCAUSE_DB 0x4
+#define DEBUGCAUSE_BI 0x8
+#define DEBUGCAUSE_BN 0x10
+#define DEBUGCAUSE_DI 0x20
+#define DEBUGCAUSE_DBNUM 0xf00
+#define DEBUGCAUSE_DBNUM_SHIFT 8
+
+#define DBREAKC_SB 0x80000000
+#define DBREAKC_LB 0x40000000
+#define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
+#define DBREAKC_MASK 0x3f
+
+#define MAX_NAREG 64
+#define MAX_NINTERRUPT 32
+#define MAX_NLEVEL 6
+#define MAX_NNMI 1
+#define MAX_NCCOMPARE 3
+#define MAX_TLB_WAY_SIZE 8
+#define MAX_NDBREAK 2
+
+#define REGION_PAGE_MASK 0xe0000000
+
+#define PAGE_CACHE_MASK 0x700
+#define PAGE_CACHE_SHIFT 8
+#define PAGE_CACHE_INVALID 0x000
+#define PAGE_CACHE_BYPASS 0x100
+#define PAGE_CACHE_WT 0x200
+#define PAGE_CACHE_WB 0x400
+#define PAGE_CACHE_ISOLATE 0x600
+
+enum {
+ /* Static vectors */
+ EXC_RESET,
+ EXC_MEMORY_ERROR,
+
+ /* Dynamic vectors */
+ EXC_WINDOW_OVERFLOW4,
+ EXC_WINDOW_UNDERFLOW4,
+ EXC_WINDOW_OVERFLOW8,
+ EXC_WINDOW_UNDERFLOW8,
+ EXC_WINDOW_OVERFLOW12,
+ EXC_WINDOW_UNDERFLOW12,
+ EXC_IRQ,
+ EXC_KERNEL,
+ EXC_USER,
+ EXC_DOUBLE,
+ EXC_DEBUG,
+ EXC_MAX
+};
+
+enum {
+ ILLEGAL_INSTRUCTION_CAUSE = 0,
+ SYSCALL_CAUSE,
+ INSTRUCTION_FETCH_ERROR_CAUSE,
+ LOAD_STORE_ERROR_CAUSE,
+ LEVEL1_INTERRUPT_CAUSE,
+ ALLOCA_CAUSE,
+ INTEGER_DIVIDE_BY_ZERO_CAUSE,
+ PRIVILEGED_CAUSE = 8,
+ LOAD_STORE_ALIGNMENT_CAUSE,
+
+ INSTR_PIF_DATA_ERROR_CAUSE = 12,
+ LOAD_STORE_PIF_DATA_ERROR_CAUSE,
+ INSTR_PIF_ADDR_ERROR_CAUSE,
+ LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
+
+ INST_TLB_MISS_CAUSE,
+ INST_TLB_MULTI_HIT_CAUSE,
+ INST_FETCH_PRIVILEGE_CAUSE,
+ INST_FETCH_PROHIBITED_CAUSE = 20,
+ LOAD_STORE_TLB_MISS_CAUSE = 24,
+ LOAD_STORE_TLB_MULTI_HIT_CAUSE,
+ LOAD_STORE_PRIVILEGE_CAUSE,
+ LOAD_PROHIBITED_CAUSE = 28,
+ STORE_PROHIBITED_CAUSE,
+
+ COPROCESSOR0_DISABLED = 32,
+};
+
+typedef enum {
+ INTTYPE_LEVEL,
+ INTTYPE_EDGE,
+ INTTYPE_NMI,
+ INTTYPE_SOFTWARE,
+ INTTYPE_TIMER,
+ INTTYPE_DEBUG,
+ INTTYPE_WRITE_ERR,
+ INTTYPE_PROFILING,
+ INTTYPE_MAX
+} interrupt_type;
+
+typedef struct xtensa_tlb_entry {
+ uint32_t vaddr;
+ uint32_t paddr;
+ uint8_t asid;
+ uint8_t attr;
+ bool variable;
+} xtensa_tlb_entry;
+
+typedef struct xtensa_tlb {
+ unsigned nways;
+ const unsigned way_size[10];
+ bool varway56;
+ unsigned nrefillentries;
+} xtensa_tlb;
+
+typedef struct XtensaGdbReg {
+ int targno;
+ int type;
+ int group;
+ unsigned size;
+} XtensaGdbReg;
+
+typedef struct XtensaGdbRegmap {
+ int num_regs;
+ int num_core_regs;
+ /* PC + a + ar + sr + ur */
+ XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
+} XtensaGdbRegmap;
+
+typedef struct XtensaConfig {
+ const char *name;
+ uint64_t options;
+ XtensaGdbRegmap gdb_regmap;
+ unsigned nareg;
+ int excm_level;
+ int ndepc;
+ uint32_t vecbase;
+ uint32_t exception_vector[EXC_MAX];
+ unsigned ninterrupt;
+ unsigned nlevel;
+ uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
+ uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
+ uint32_t inttype_mask[INTTYPE_MAX];
+ struct {
+ uint32_t level;
+ interrupt_type inttype;
+ } interrupt[MAX_NINTERRUPT];
+ unsigned nccompare;
+ uint32_t timerint[MAX_NCCOMPARE];
+ unsigned nextint;
+ unsigned extint[MAX_NINTERRUPT];
+
+ unsigned debug_level;
+ unsigned nibreak;
+ unsigned ndbreak;
+
+ uint32_t configid[2];
+
+ uint32_t clock_freq_khz;
+
+ xtensa_tlb itlb;
+ xtensa_tlb dtlb;
+} XtensaConfig;
+
+typedef struct XtensaConfigList {
+ const XtensaConfig *config;
+ struct XtensaConfigList *next;
+} XtensaConfigList;
+
+#ifdef HOST_WORDS_BIGENDIAN
+enum {
+ FP_F32_HIGH,
+ FP_F32_LOW,
+};
+#else
+enum {
+ FP_F32_LOW,
+ FP_F32_HIGH,
+};
+#endif
+
+typedef struct CPUXtensaState {
+ const XtensaConfig *config;
+ uint32_t regs[16];
+ uint32_t pc;
+ uint32_t sregs[256];
+ uint32_t uregs[256];
+ uint32_t phys_regs[MAX_NAREG];
+ union {
+ float32 f32[2];
+ float64 f64;
+ } fregs[16];
+ float_status fp_status;
+
+ xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
+ xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
+ unsigned autorefill_idx;
+
+ int pending_irq_level; /* level of last raised IRQ */
+ void **irq_inputs;
+ QEMUTimer *ccompare_timer;
+ uint32_t wake_ccount;
+ int64_t halt_clock;
+
+ int exception_taken;
+
+ /* Watchpoints for DBREAK registers */
+ struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
+
+ CPU_COMMON
+} CPUXtensaState;
+
+#include "cpu-qom.h"
+
+#define cpu_exec cpu_xtensa_exec
+#define cpu_gen_code cpu_xtensa_gen_code
+#define cpu_signal_handler cpu_xtensa_signal_handler
+#define cpu_list xtensa_cpu_list
+
+#ifdef TARGET_WORDS_BIGENDIAN
+#define XTENSA_DEFAULT_CPU_MODEL "fsf"
+#else
+#define XTENSA_DEFAULT_CPU_MODEL "dc232b"
+#endif
+
+XtensaCPU *cpu_xtensa_init(const char *cpu_model);
+
+#define cpu_init(cpu_model) CPU(cpu_xtensa_init(cpu_model))
+
+void xtensa_translate_init(void);
+void xtensa_breakpoint_handler(CPUState *cs);
+int cpu_xtensa_exec(CPUState *cpu);
+void xtensa_finalize_config(XtensaConfig *config);
+void xtensa_register_core(XtensaConfigList *node);
+void check_interrupts(CPUXtensaState *s);
+void xtensa_irq_init(CPUXtensaState *env);
+void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
+void xtensa_advance_ccount(CPUXtensaState *env, uint32_t d);
+void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
+void xtensa_rearm_ccompare_timer(CPUXtensaState *env);
+int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
+void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
+void xtensa_sync_window_from_phys(CPUXtensaState *env);
+void xtensa_sync_phys_from_window(CPUXtensaState *env);
+uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env, bool dtlb, uint32_t way);
+void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
+ uint32_t *vpn, uint32_t wi, uint32_t *ei);
+int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
+ uint32_t *pwi, uint32_t *pei, uint8_t *pring);
+void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
+ xtensa_tlb_entry *entry, bool dtlb,
+ unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
+void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
+ unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
+int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
+ uint32_t vaddr, int is_write, int mmu_idx,
+ uint32_t *paddr, uint32_t *page_size, unsigned *access);
+void reset_mmu(CPUXtensaState *env);
+void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
+void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
+
+
+#define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
+#define XTENSA_OPTION_ALL (~(uint64_t)0)
+
+static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
+ uint64_t opt)
+{
+ return (config->options & opt) != 0;
+}
+
+static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
+{
+ return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
+}
+
+static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
+{
+ int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
+ if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
+ level = env->config->excm_level;
+ }
+ return level;
+}
+
+static inline int xtensa_get_ring(const CPUXtensaState *env)
+{
+ if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
+ return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
+ } else {
+ return 0;
+ }
+}
+
+static inline int xtensa_get_cring(const CPUXtensaState *env)
+{
+ if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
+ (env->sregs[PS] & PS_EXCM) == 0) {
+ return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
+ } else {
+ return 0;
+ }
+}
+
+static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
+ bool dtlb, unsigned wi, unsigned ei)
+{
+ return dtlb ?
+ env->dtlb[wi] + ei :
+ env->itlb[wi] + ei;
+}
+
+static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
+{
+ return env->sregs[WINDOW_START] |
+ (env->sregs[WINDOW_START] << env->config->nareg / 4);
+}
+
+/* MMU modes definitions */
+#define MMU_MODE0_SUFFIX _ring0
+#define MMU_MODE1_SUFFIX _ring1
+#define MMU_MODE2_SUFFIX _ring2
+#define MMU_MODE3_SUFFIX _ring3
+
+static inline int cpu_mmu_index(CPUXtensaState *env)
+{
+ return xtensa_get_cring(env);
+}
+
+#define XTENSA_TBFLAG_RING_MASK 0x3
+#define XTENSA_TBFLAG_EXCM 0x4
+#define XTENSA_TBFLAG_LITBASE 0x8
+#define XTENSA_TBFLAG_DEBUG 0x10
+#define XTENSA_TBFLAG_ICOUNT 0x20
+#define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
+#define XTENSA_TBFLAG_CPENABLE_SHIFT 6
+#define XTENSA_TBFLAG_EXCEPTION 0x4000
+#define XTENSA_TBFLAG_WINDOW_MASK 0x18000
+#define XTENSA_TBFLAG_WINDOW_SHIFT 15
+
+static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
+ target_ulong *cs_base, int *flags)
+{
+ CPUState *cs = CPU(xtensa_env_get_cpu(env));
+
+ *pc = env->pc;
+ *cs_base = 0;
+ *flags = 0;
+ *flags |= xtensa_get_ring(env);
+ if (env->sregs[PS] & PS_EXCM) {
+ *flags |= XTENSA_TBFLAG_EXCM;
+ }
+ if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
+ (env->sregs[LITBASE] & 1)) {
+ *flags |= XTENSA_TBFLAG_LITBASE;
+ }
+ if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
+ if (xtensa_get_cintlevel(env) < env->config->debug_level) {
+ *flags |= XTENSA_TBFLAG_DEBUG;
+ }
+ if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
+ *flags |= XTENSA_TBFLAG_ICOUNT;
+ }
+ }
+ if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
+ *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
+ }
+ if (cs->singlestep_enabled && env->exception_taken) {
+ *flags |= XTENSA_TBFLAG_EXCEPTION;
+ }
+ if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
+ (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
+ uint32_t windowstart = xtensa_replicate_windowstart(env) >>
+ (env->sregs[WINDOW_BASE] + 1);
+ uint32_t w = ctz32(windowstart | 0x8);
+
+ *flags |= w << XTENSA_TBFLAG_WINDOW_SHIFT;
+ } else {
+ *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
+ }
+}
+
+#include "exec/cpu-all.h"
+#include "exec/exec-all.h"
+
+#endif
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