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qemu-patch-raspberry4/target/xtensa/cpu.h
Max Filippov 5d630cef4f target/xtensa: rework zero overhead loops implementation 
Don't invalidate TB with the end of zero overhead loop when LBEG or LEND
change. Instead encode the distance from the start of the page where the
TB starts to the LEND in the TB cs_base and generate loopback code when
the next PC matches encoded LEND. Distance to a destination within the
same page and up to a maximum instruction length into the next page is
encoded literally, otherwise it's zero. The distance from LEND to LBEG
is also encoded in the cs_base: it's encoded literally when less than
256 or as 0 otherwise. This allows for TB chaining for the loopback
branch at the end of a loop for the most common loop sizes.

With this change the resulting emulation speed is about 10% higher in
softmmu mode on uClibc-ng and LTP tests. Emulation speed in linux
user mode is a few percent lower because there's no direct TB chaining
between different memory pages. Testing with lower limit on direct TB
chaining range shows gradual slowdown to ~15% for the block size of 64
bytes and ~50% for the block size of 32 bytes.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2019-01-11 20:52:24 -08:00

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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
#define ALIGNED_ONLY
#define TARGET_LONG_BITS 32
/* Xtensa processors have a weak memory model */
#define TCG_GUEST_DEFAULT_MO (0)
#define CPUArchState struct CPUXtensaState
#include "qemu-common.h"
#include "cpu-qom.h"
#include "exec/cpu-defs.h"
#include "xtensa-isa.h"
#define NB_MMU_MODES 4
#define TARGET_PHYS_ADDR_SPACE_BITS 32
#ifdef CONFIG_USER_ONLY
#define TARGET_VIRT_ADDR_SPACE_BITS 30
#else
#define TARGET_VIRT_ADDR_SPACE_BITS 32
#endif
#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,
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_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,
WINDOW_BASE = 72,
WINDOW_START = 73,
PTEVADDR = 83,
MMID = 89,
RASID = 90,
ITLBCFG = 91,
DTLBCFG = 92,
IBREAKENABLE = 96,
MEMCTL = 97,
CACHEATTR = 98,
ATOMCTL = 99,
DDR = 104,
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_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 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,
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;
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 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 DisasContext DisasContext;
typedef void (*XtensaOpcodeOp)(DisasContext *dc, const uint32_t arg[],
const uint32_t par[]);
typedef bool (*XtensaOpcodeBoolTest)(DisasContext *dc,
const uint32_t arg[],
const uint32_t par[]);
typedef uint32_t (*XtensaOpcodeUintTest)(DisasContext *dc,
const uint32_t 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,
XTENSA_OP_CHECK_INTERRUPTS = 0x200,
XTENSA_OP_EXIT_TB_M1 = 0x400,
XTENSA_OP_EXIT_TB_0 = 0x800,
};
typedef struct XtensaOpcodeOps {
const char *name;
XtensaOpcodeOp translate;
XtensaOpcodeBoolTest test_ill;
XtensaOpcodeUintTest test_overflow;
const uint32_t *par;
uint32_t op_flags;
uint32_t windowed_register_op;
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;
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;
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;
uint32_t memctl_mask;
XtensaMemory instrom;
XtensaMemory instram;
XtensaMemory datarom;
XtensaMemory dataram;
XtensaMemory sysrom;
XtensaMemory sysram;
uint32_t configid[2];
void *isa_internal;
xtensa_isa isa;
XtensaOpcodeOps **opcode_ops;
const XtensaOpcodeTranslators **opcode_translators;
uint32_t clock_freq_khz;
xtensa_tlb itlb;
xtensa_tlb dtlb;
};
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;
#ifndef CONFIG_USER_ONLY
xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
unsigned autorefill_idx;
bool runstall;
AddressSpace *address_space_er;
MemoryRegion *system_er;
int pending_irq_level; /* level of last raised IRQ */
void **irq_inputs;
XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
uint64_t time_base;
uint64_t ccount_time;
uint32_t ccount_base;
#endif
int exception_taken;
int yield_needed;
unsigned static_vectors;
/* Watchpoints for DBREAK registers */
struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
CPU_COMMON
} CPUXtensaState;
/**
* XtensaCPU:
* @env: #CPUXtensaState
*
* An Xtensa CPU.
*/
struct XtensaCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPUXtensaState env;
};
static inline XtensaCPU *xtensa_env_get_cpu(const CPUXtensaState *env)
{
return container_of(env, XtensaCPU, env);
}
#define ENV_GET_CPU(e) CPU(xtensa_env_get_cpu(e))
#define ENV_OFFSET offsetof(XtensaCPU, env)
int xtensa_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw, int size,
int mmu_idx);
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,
fprintf_function cpu_fprintf, 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, uint8_t *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_translate_init(void);
void xtensa_breakpoint_handler(CPUState *cs);
void xtensa_finalize_config(XtensaConfig *config);
void xtensa_register_core(XtensaConfigList *node);
void xtensa_sim_open_console(Chardev *chr);
void check_interrupts(CPUXtensaState *s);
void xtensa_irq_init(CPUXtensaState *env);
void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
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);
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);
XtensaOpcodeOps *xtensa_find_opcode_ops(const XtensaOpcodeTranslators *t,
const char *opcode);
#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;
}
}
#ifndef CONFIG_USER_ONLY
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);
static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
{
return env->system_er;
}
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;
}
#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_MODE0_SUFFIX _ring0
#define MMU_MODE1_SUFFIX _ring1
#define MMU_MODE2_SUFFIX _ring2
#define MMU_MODE3_SUFFIX _ring3
#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_EXCEPTION 0x4000
#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
static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *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;
} 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 (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) | 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;
}
}
#include "exec/cpu-all.h"
#endif
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