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qemu/target/xtensa/cpu.h
Max Filippov cb2d627a00 target/xtensa: don't generate extra EXCP_DEBUG on exception 
target/xtensa used to generate an extra EXCP_DEBUG exception before the
first instruction executed after an interrupt or an exception is taken
to allow single-stepping that instruction in the debugger.
This is no longer needed after the following commits:
a7ba744f40 ("tcg/cpu-exec: precise single-stepping after an exception")
ba3c35d9c4 ("tcg/cpu-exec: precise single-stepping after an interrupt")
Drop exception state tracking/extra EXCP_DEBUG generation code.

Cc: qemu-stable@nongnu.org # v5.1, v5.2, v6.0
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2021-05-20 13:02:58 -07:00

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/*
* 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 XTENSA_CPU_H
#define XTENSA_CPU_H
#include "cpu-qom.h"
#include "exec/cpu-defs.h"
#include "xtensa-isa.h"
/* Xtensa processors have a weak memory model */
#define TCG_GUEST_DEFAULT_MO (0)
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_DFP_COPROCESSOR,
XTENSA_OPTION_DFPU_SINGLE_ONLY,
XTENSA_OPTION_MP_SYNCHRO,
XTENSA_OPTION_CONDITIONAL_STORE,
XTENSA_OPTION_ATOMCTL,
XTENSA_OPTION_DEPBITS,
/* 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_MPU,
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,
XTENSA_OPTION_EXTERN_REGS,
};
enum {
EXPSTATE = 230,
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,
PREFCTL = 40,
WINDOW_BASE = 72,
WINDOW_START = 73,
PTEVADDR = 83,
MMID = 89,
RASID = 90,
MPUENB = 90,
ITLBCFG = 91,
DTLBCFG = 92,
MPUCFG = 92,
ERACCESS = 95,
IBREAKENABLE = 96,
MEMCTL = 97,
CACHEATTR = 98,
CACHEADRDIS = 98,
ATOMCTL = 99,
DDR = 104,
MEPC = 106,
MEPS = 107,
MESAVE = 108,
MESR = 109,
MECR = 110,
MEVADDR = 111,
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_OWB_LEN 4
#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 MEMCTL_INIT 0x00800000
#define MEMCTL_IUSEWAYS_SHIFT 18
#define MEMCTL_IUSEWAYS_LEN 5
#define MEMCTL_IUSEWAYS_MASK 0x007c0000
#define MEMCTL_DALLOCWAYS_SHIFT 13
#define MEMCTL_DALLOCWAYS_LEN 5
#define MEMCTL_DALLOCWAYS_MASK 0x0003e000
#define MEMCTL_DUSEWAYS_SHIFT 8
#define MEMCTL_DUSEWAYS_LEN 5
#define MEMCTL_DUSEWAYS_MASK 0x00001f00
#define MEMCTL_ISNP 0x4
#define MEMCTL_DSNP 0x2
#define MEMCTL_IL0EN 0x1
#define MAX_INSN_LENGTH 64
#define MAX_INSNBUF_LENGTH \
((MAX_INSN_LENGTH + sizeof(xtensa_insnbuf_word) - 1) / \
sizeof(xtensa_insnbuf_word))
#define MAX_INSN_SLOTS 32
#define MAX_OPCODE_ARGS 16
#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 MAX_NMEMORY 4
#define MAX_MPU_FOREGROUND_SEGMENTS 32
#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_RESET0,
EXC_RESET1,
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,
PC_VALUE_ERROR_CAUSE,
PRIVILEGED_CAUSE,
LOAD_STORE_ALIGNMENT_CAUSE,
EXTERNAL_REG_PRIVILEGE_CAUSE,
EXCLUSIVE_ERROR_CAUSE,
INSTR_PIF_DATA_ERROR_CAUSE,
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_IDMA_DONE,
INTTYPE_IDMA_ERR,
INTTYPE_GS_ERR,
INTTYPE_MAX
} interrupt_type;
struct CPUXtensaState;
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 xtensa_mpu_entry {
uint32_t vaddr;
uint32_t attr;
} xtensa_mpu_entry;
typedef struct XtensaGdbReg {
int targno;
unsigned flags;
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 XtensaCcompareTimer {
struct CPUXtensaState *env;
QEMUTimer *timer;
} XtensaCcompareTimer;
typedef struct XtensaMemory {
unsigned num;
struct XtensaMemoryRegion {
uint32_t addr;
uint32_t size;
} location[MAX_NMEMORY];
} XtensaMemory;
typedef struct opcode_arg {
uint32_t imm;
uint32_t raw_imm;
void *in;
void *out;
uint32_t num_bits;
} OpcodeArg;
typedef struct DisasContext DisasContext;
typedef void (*XtensaOpcodeOp)(DisasContext *dc, const OpcodeArg arg[],
const uint32_t par[]);
typedef uint32_t (*XtensaOpcodeUintTest)(DisasContext *dc,
const OpcodeArg arg[],
const uint32_t par[]);
enum {
XTENSA_OP_ILL = 0x1,
XTENSA_OP_PRIVILEGED = 0x2,
XTENSA_OP_SYSCALL = 0x4,
XTENSA_OP_DEBUG_BREAK = 0x8,
XTENSA_OP_OVERFLOW = 0x10,
XTENSA_OP_UNDERFLOW = 0x20,
XTENSA_OP_ALLOCA = 0x40,
XTENSA_OP_COPROCESSOR = 0x80,
XTENSA_OP_DIVIDE_BY_ZERO = 0x100,
/* Postprocessing flags */
XTENSA_OP_CHECK_INTERRUPTS = 0x200,
XTENSA_OP_EXIT_TB_M1 = 0x400,
XTENSA_OP_EXIT_TB_0 = 0x800,
XTENSA_OP_SYNC_REGISTER_WINDOW = 0x1000,
XTENSA_OP_POSTPROCESS =
XTENSA_OP_CHECK_INTERRUPTS |
XTENSA_OP_EXIT_TB_M1 |
XTENSA_OP_EXIT_TB_0 |
XTENSA_OP_SYNC_REGISTER_WINDOW,
XTENSA_OP_NAME_ARRAY = 0x8000,
XTENSA_OP_CONTROL_FLOW = 0x10000,
XTENSA_OP_STORE = 0x20000,
XTENSA_OP_LOAD = 0x40000,
XTENSA_OP_LOAD_STORE =
XTENSA_OP_LOAD | XTENSA_OP_STORE,
};
typedef struct XtensaOpcodeOps {
const void *name;
XtensaOpcodeOp translate;
XtensaOpcodeUintTest test_exceptions;
XtensaOpcodeUintTest test_overflow;
const uint32_t *par;
uint32_t op_flags;
uint32_t coprocessor;
} XtensaOpcodeOps;
typedef struct XtensaOpcodeTranslators {
unsigned num_opcodes;
const XtensaOpcodeOps *opcode;
} XtensaOpcodeTranslators;
extern const XtensaOpcodeTranslators xtensa_core_opcodes;
extern const XtensaOpcodeTranslators xtensa_fpu2000_opcodes;
extern const XtensaOpcodeTranslators xtensa_fpu_opcodes;
struct XtensaConfig {
const char *name;
uint64_t options;
XtensaGdbRegmap gdb_regmap;
unsigned nareg;
int excm_level;
int ndepc;
unsigned inst_fetch_width;
unsigned max_insn_size;
uint32_t vecbase;
uint32_t exception_vector[EXC_MAX];
unsigned ninterrupt;
unsigned nlevel;
unsigned nmi_level;
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;
unsigned icache_ways;
unsigned dcache_ways;
unsigned dcache_line_bytes;
uint32_t memctl_mask;
XtensaMemory instrom;
XtensaMemory instram;
XtensaMemory datarom;
XtensaMemory dataram;
XtensaMemory sysrom;
XtensaMemory sysram;
unsigned hw_version;
uint32_t configid[2];
void *isa_internal;
xtensa_isa isa;
XtensaOpcodeOps **opcode_ops;
const XtensaOpcodeTranslators **opcode_translators;
xtensa_regfile a_regfile;
void ***regfile;
uint32_t clock_freq_khz;
xtensa_tlb itlb;
xtensa_tlb dtlb;
uint32_t mpu_align;
unsigned n_mpu_fg_segments;
unsigned n_mpu_bg_segments;
const xtensa_mpu_entry *mpu_bg;
bool use_first_nan;
};
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;
uint32_t windowbase_next;
uint32_t exclusive_addr;
uint32_t exclusive_val;
#ifndef CONFIG_USER_ONLY
xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
xtensa_mpu_entry mpu_fg[MAX_MPU_FOREGROUND_SEGMENTS];
unsigned autorefill_idx;
bool runstall;
AddressSpace *address_space_er;
MemoryRegion *system_er;
int pending_irq_level; /* level of last raised IRQ */
qemu_irq *irq_inputs;
qemu_irq ext_irq_inputs[MAX_NINTERRUPT];
qemu_irq runstall_irq;
XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
uint64_t time_base;
uint64_t ccount_time;
uint32_t ccount_base;
#endif
int yield_needed;
unsigned static_vectors;
/* Watchpoints for DBREAK registers */
struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
} CPUXtensaState;
/**
* XtensaCPU:
* @env: #CPUXtensaState
*
* An Xtensa CPU.
*/
struct XtensaCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPUNegativeOffsetState neg;
CPUXtensaState env;
};
bool xtensa_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
void xtensa_cpu_do_interrupt(CPUState *cpu);
bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
void xtensa_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
unsigned size, MMUAccessType access_type,
int mmu_idx, MemTxAttrs attrs,
MemTxResult response, uintptr_t retaddr);
void xtensa_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
void xtensa_count_regs(const XtensaConfig *config,
unsigned *n_regs, unsigned *n_core_regs);
int xtensa_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
int xtensa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
void xtensa_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr);
#define cpu_signal_handler cpu_xtensa_signal_handler
#define cpu_list xtensa_cpu_list
#define XTENSA_CPU_TYPE_SUFFIX "-" TYPE_XTENSA_CPU
#define XTENSA_CPU_TYPE_NAME(model) model XTENSA_CPU_TYPE_SUFFIX
#define CPU_RESOLVING_TYPE TYPE_XTENSA_CPU
#ifdef TARGET_WORDS_BIGENDIAN
#define XTENSA_DEFAULT_CPU_MODEL "fsf"
#define XTENSA_DEFAULT_CPU_NOMMU_MODEL "fsf"
#else
#define XTENSA_DEFAULT_CPU_MODEL "dc232b"
#define XTENSA_DEFAULT_CPU_NOMMU_MODEL "de212"
#endif
#define XTENSA_DEFAULT_CPU_TYPE \
XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_MODEL)
#define XTENSA_DEFAULT_CPU_NOMMU_TYPE \
XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_NOMMU_MODEL)
void xtensa_collect_sr_names(const XtensaConfig *config);
void xtensa_translate_init(void);
void **xtensa_get_regfile_by_name(const char *name, int entries, int bits);
void xtensa_breakpoint_handler(CPUState *cs);
void xtensa_register_core(XtensaConfigList *node);
void xtensa_sim_open_console(Chardev *chr);
void check_interrupts(CPUXtensaState *s);
void xtensa_irq_init(CPUXtensaState *env);
qemu_irq *xtensa_get_extints(CPUXtensaState *env);
qemu_irq xtensa_get_runstall(CPUXtensaState *env);
int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
void xtensa_cpu_list(void);
void xtensa_sync_window_from_phys(CPUXtensaState *env);
void xtensa_sync_phys_from_window(CPUXtensaState *env);
void xtensa_rotate_window(CPUXtensaState *env, uint32_t delta);
void xtensa_restore_owb(CPUXtensaState *env);
void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
static inline void xtensa_select_static_vectors(CPUXtensaState *env,
unsigned n)
{
assert(n < 2);
env->static_vectors = n;
}
void xtensa_runstall(CPUXtensaState *env, bool runstall);
#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_bits_enabled(env->config,
XTENSA_OPTION_BIT(XTENSA_OPTION_MMU) |
XTENSA_OPTION_BIT(XTENSA_OPTION_MPU))) {
return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
} else {
return 0;
}
}
static inline int xtensa_get_cring(const CPUXtensaState *env)
{
if (xtensa_option_bits_enabled(env->config,
XTENSA_OPTION_BIT(XTENSA_OPTION_MMU) |
XTENSA_OPTION_BIT(XTENSA_OPTION_MPU)) &&
(env->sregs[PS] & PS_EXCM) == 0) {
return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
} else {
return 0;
}
}
#ifndef CONFIG_USER_ONLY
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(CPUXtensaState *env);
static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
{
return env->system_er;
}
#else
void xtensa_set_abi_call0(void);
bool xtensa_abi_call0(void);
#endif
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_USER_IDX 3
static inline int cpu_mmu_index(CPUXtensaState *env, bool ifetch)
{
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_WINDOW_MASK 0x18000
#define XTENSA_TBFLAG_WINDOW_SHIFT 15
#define XTENSA_TBFLAG_YIELD 0x20000
#define XTENSA_TBFLAG_CWOE 0x40000
#define XTENSA_TBFLAG_CALLINC_MASK 0x180000
#define XTENSA_TBFLAG_CALLINC_SHIFT 19
#define XTENSA_CSBASE_LEND_MASK 0x0000ffff
#define XTENSA_CSBASE_LEND_SHIFT 0
#define XTENSA_CSBASE_LBEG_OFF_MASK 0x00ff0000
#define XTENSA_CSBASE_LBEG_OFF_SHIFT 16
typedef CPUXtensaState CPUArchState;
typedef XtensaCPU ArchCPU;
#include "exec/cpu-all.h"
static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
*cs_base = 0;
*flags = 0;
*flags |= xtensa_get_ring(env);
if (env->sregs[PS] & PS_EXCM) {
*flags |= XTENSA_TBFLAG_EXCM;
} else if (xtensa_option_enabled(env->config, XTENSA_OPTION_LOOP)) {
target_ulong lend_dist =
env->sregs[LEND] - (env->pc & -(1u << TARGET_PAGE_BITS));
/*
* 0 in the csbase_lend field means that there may not be a loopback
* for any instruction that starts inside this page. Any other value
* means that an instruction that ends at this offset from the page
* start may loop back and will need loopback code to be generated.
*
* lend_dist is 0 when LEND points to the start of the page, but
* no instruction that starts inside this page may end at offset 0,
* so it's still correct.
*
* When an instruction ends at a page boundary it may only start in
* the previous page. lend_dist will be encoded as TARGET_PAGE_SIZE
* for the TB that contains this instruction.
*/
if (lend_dist < (1u << TARGET_PAGE_BITS) + env->config->max_insn_size) {
target_ulong lbeg_off = env->sregs[LEND] - env->sregs[LBEG];
*cs_base = lend_dist;
if (lbeg_off < 256) {
*cs_base |= lbeg_off << XTENSA_CSBASE_LBEG_OFF_SHIFT;
}
}
}
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 (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) | XTENSA_TBFLAG_CWOE;
*flags |= extract32(env->sregs[PS], PS_CALLINC_SHIFT,
PS_CALLINC_LEN) << XTENSA_TBFLAG_CALLINC_SHIFT;
} else {
*flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
}
if (env->yield_needed) {
*flags |= XTENSA_TBFLAG_YIELD;
}
}
#endif
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