frv-sim.h

这个是LINUX下的GDB调度工具的源码

/* collection of junk waiting time to sort out
   Copyright (C) 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
   Contributed by Red Hat

This file is part of the GNU Simulators.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifndef FRV_SIM_H
#define FRV_SIM_H

#include "sim-options.h"

/* True if SPR is the number of accumulator or accumulator guard register.  */
#define SPR_IS_ACC(SPR) ((SPR) >= 1408 && (SPR) <= 1535)

/* Initialization of the frv cpu.  */
void frv_initialize (SIM_CPU *, SIM_DESC);
void frv_term (SIM_DESC);
void frv_power_on_reset (SIM_CPU *);
void frv_hardware_reset (SIM_CPU *);
void frv_software_reset (SIM_CPU *);

/* The reset register.  See FRV LSI section 10.3.1  */
#define RSTR_ADDRESS        0xfeff0500
#define RSTR_INITIAL_VALUE  0x00000400
#define RSTR_HARDWARE_RESET 0x00000200
#define RSTR_SOFTWARE_RESET 0x00000100

#define GET_RSTR_HR(rstr) (((rstr) >> 1) & 1)
#define GET_RSTR_SR(rstr) (((rstr)     ) & 1)

#define SET_RSTR_H(rstr) ((rstr) |= (1 << 9))
#define SET_RSTR_S(rstr) ((rstr) |= (1 << 8))

#define CLEAR_RSTR_P(rstr)  ((rstr) &= ~(1 << 10))
#define CLEAR_RSTR_H(rstr)  ((rstr) &= ~(1 <<  9))
#define CLEAR_RSTR_S(rstr)  ((rstr) &= ~(1 <<  8))
#define CLEAR_RSTR_HR(rstr) ((rstr) &= ~(1 <<  1))
#define CLEAR_RSTR_SR(rstr) ((rstr) &= ~1)

/* Cutomized hardware get/set functions.  */
extern USI  frvbf_h_spr_get_handler (SIM_CPU *, UINT);
extern void frvbf_h_spr_set_handler (SIM_CPU *, UINT, USI);
extern USI  frvbf_h_gr_get_handler (SIM_CPU *, UINT);
extern void frvbf_h_gr_set_handler (SIM_CPU *, UINT, USI);
extern UHI  frvbf_h_gr_hi_get_handler (SIM_CPU *, UINT);
extern void frvbf_h_gr_hi_set_handler (SIM_CPU *, UINT, UHI);
extern UHI  frvbf_h_gr_lo_get_handler (SIM_CPU *, UINT);
extern void frvbf_h_gr_lo_set_handler (SIM_CPU *, UINT, UHI);
extern DI   frvbf_h_gr_double_get_handler (SIM_CPU *, UINT);
extern void frvbf_h_gr_double_set_handler (SIM_CPU *, UINT, DI);
extern SF   frvbf_h_fr_get_handler (SIM_CPU *, UINT);
extern void frvbf_h_fr_set_handler (SIM_CPU *, UINT, SF);
extern DF   frvbf_h_fr_double_get_handler (SIM_CPU *, UINT);
extern void frvbf_h_fr_double_set_handler (SIM_CPU *, UINT, DF);
extern USI  frvbf_h_fr_int_get_handler (SIM_CPU *, UINT);
extern void frvbf_h_fr_int_set_handler (SIM_CPU *, UINT, USI);
extern DI   frvbf_h_cpr_double_get_handler (SIM_CPU *, UINT);
extern void frvbf_h_cpr_double_set_handler (SIM_CPU *, UINT, DI);
extern void frvbf_h_gr_quad_set_handler (SIM_CPU *, UINT, SI *);
extern void frvbf_h_fr_quad_set_handler (SIM_CPU *, UINT, SI *);
extern void frvbf_h_cpr_quad_set_handler (SIM_CPU *, UINT, SI *);
extern void frvbf_h_psr_s_set_handler (SIM_CPU *, BI);

extern USI  spr_psr_get_handler (SIM_CPU *);
extern void spr_psr_set_handler (SIM_CPU *, USI);
extern USI  spr_tbr_get_handler (SIM_CPU *);
extern void spr_tbr_set_handler (SIM_CPU *, USI);
extern USI  spr_bpsr_get_handler (SIM_CPU *);
extern void spr_bpsr_set_handler (SIM_CPU *, USI);
extern USI  spr_ccr_get_handler (SIM_CPU *);
extern void spr_ccr_set_handler (SIM_CPU *, USI);
extern void spr_cccr_set_handler (SIM_CPU *, USI);
extern USI  spr_cccr_get_handler (SIM_CPU *);
extern USI  spr_isr_get_handler (SIM_CPU *);
extern void spr_isr_set_handler (SIM_CPU *, USI);
extern USI  spr_sr_get_handler (SIM_CPU *, UINT);
extern void spr_sr_set_handler (SIM_CPU *, UINT, USI);

extern void frvbf_switch_supervisor_user_context (SIM_CPU *);

extern QI frvbf_set_icc_for_shift_left  (SIM_CPU *, SI, SI, QI);
extern QI frvbf_set_icc_for_shift_right (SIM_CPU *, SI, SI, QI);

/* Insn semantics.  */
extern void frvbf_signed_integer_divide (SIM_CPU *, SI, SI, int, int);
extern void frvbf_unsigned_integer_divide (SIM_CPU *, USI, USI, int, int);
extern SI   frvbf_shift_left_arith_saturate (SIM_CPU *, SI, SI);
extern SI   frvbf_iacc_cut (SIM_CPU *, DI, SI);

extern void frvbf_clear_accumulators (SIM_CPU *, SI, int);

extern SI   frvbf_scan_result (SIM_CPU *, SI);
extern SI   frvbf_cut (SIM_CPU *, SI, SI, SI);
extern SI   frvbf_media_cut (SIM_CPU *, DI, SI);
extern SI   frvbf_media_cut_ss (SIM_CPU *, DI, SI);
extern void frvbf_media_cop (SIM_CPU *, int);
extern UQI  frvbf_cr_logic (SIM_CPU *, SI, UQI, UQI);

extern void frvbf_set_write_next_vliw_addr_to_LR (SIM_CPU *, int);
extern int  frvbf_write_next_vliw_addr_to_LR;

extern void frvbf_set_ne_index (SIM_CPU *, int);
extern void frvbf_force_update (SIM_CPU *);

#define GETTWI GETTSI
#define SETTWI SETTSI
#define LEUINT LEUSI

/* Hardware/device support.
   ??? Will eventually want to move device stuff to config files.  */

/* Support for the MCCR register (Cache Control Register) is needed in order
   for overlays to work correctly with the scache: cached instructions need
   to be flushed when the instruction space is changed at runtime.  */

/* These were just copied from another port and are necessary to build, but
   but don't appear to be used.  */
#define MCCR_ADDR 0xffffffff
#define MCCR_CP 0x80
/* not supported */
#define MCCR_CM0 2
#define MCCR_CM1 1

/* sim_core_attach device argument.  */
extern device frv_devices;

/* FIXME: Temporary, until device support ready.  */
struct _device { int foo; };

/* maintain the address of the start of the previous VLIW insn sequence.  */
extern IADDR previous_vliw_pc;
extern CGEN_ATTR_VALUE_TYPE frv_current_fm_slot;

/* Hardware status.  */
#define GET_HSR0() GET_H_SPR (H_SPR_HSR0)
#define SET_HSR0(hsr0) SET_H_SPR (H_SPR_HSR0, (hsr0))

#define GET_HSR0_ICE(hsr0) (((hsr0) >> 31) & 1)
#define SET_HSR0_ICE(hsr0) ((hsr0) |= (1 << 31))
#define CLEAR_HSR0_ICE(hsr0) ((hsr0) &= ~(1 << 31))

#define GET_HSR0_DCE(hsr0) (((hsr0) >> 30) & 1)
#define SET_HSR0_DCE(hsr0) ((hsr0) |= (1 << 30))
#define CLEAR_HSR0_DCE(hsr0) ((hsr0) &= ~(1 << 30))

#define GET_HSR0_CBM(hsr0) (((hsr0) >> 27) & 1)
#define GET_HSR0_RME(hsr0) (((hsr0) >> 22) & 1)
#define GET_HSR0_SA(hsr0)  (((hsr0) >> 12) & 1)
#define GET_HSR0_FRN(hsr0) (((hsr0) >> 11) & 1)
#define GET_HSR0_GRN(hsr0) (((hsr0) >> 10) & 1)
#define GET_HSR0_FRHE(hsr0) (((hsr0) >> 9) & 1)
#define GET_HSR0_FRLE(hsr0) (((hsr0) >> 8) & 1)
#define GET_HSR0_GRHE(hsr0) (((hsr0) >> 7) & 1)
#define GET_HSR0_GRLE(hsr0) (((hsr0) >> 6) & 1)

#define GET_IHSR8() GET_H_SPR (H_SPR_IHSR8)
#define GET_IHSR8_NBC(ihsr8) ((ihsr8) & 1)
#define GET_IHSR8_ICDM(ihsr8) (((ihsr8) >>  1) & 1)
#define GET_IHSR8_ICWE(ihsr8) (((ihsr8) >>  8) & 7)
#define GET_IHSR8_DCWE(ihsr8) (((ihsr8) >> 12) & 7)

void frvbf_insn_cache_preload (SIM_CPU *, SI, USI, int);
void frvbf_data_cache_preload (SIM_CPU *, SI, USI, int);
void frvbf_insn_cache_unlock (SIM_CPU *, SI);
void frvbf_data_cache_unlock (SIM_CPU *, SI);
void frvbf_insn_cache_invalidate (SIM_CPU *, SI, int);
void frvbf_data_cache_invalidate (SIM_CPU *, SI, int);
void frvbf_data_cache_flush (SIM_CPU *, SI, int);

/* FR-V Interrupt classes.
   These are declared in order of increasing priority.  */
enum frv_interrupt_class
{
  FRV_EXTERNAL_INTERRUPT,
  FRV_SOFTWARE_INTERRUPT,
  FRV_PROGRAM_INTERRUPT,
  FRV_BREAK_INTERRUPT,
  FRV_RESET_INTERRUPT,
  NUM_FRV_INTERRUPT_CLASSES
};

/* FR-V Interrupt kinds.
   These are declared in order of increasing priority.  */
enum frv_interrupt_kind
{
  /* External interrupts */
  FRV_INTERRUPT_LEVEL_1,
  FRV_INTERRUPT_LEVEL_2,
  FRV_INTERRUPT_LEVEL_3,
  FRV_INTERRUPT_LEVEL_4,
  FRV_INTERRUPT_LEVEL_5,
  FRV_INTERRUPT_LEVEL_6,
  FRV_INTERRUPT_LEVEL_7,
  FRV_INTERRUPT_LEVEL_8,
  FRV_INTERRUPT_LEVEL_9,
  FRV_INTERRUPT_LEVEL_10,
  FRV_INTERRUPT_LEVEL_11,
  FRV_INTERRUPT_LEVEL_12,
  FRV_INTERRUPT_LEVEL_13,
  FRV_INTERRUPT_LEVEL_14,
  FRV_INTERRUPT_LEVEL_15,
  /* Software interrupt */
  FRV_TRAP_INSTRUCTION,
  /* Program interrupts */
  FRV_COMMIT_EXCEPTION,
  FRV_DIVISION_EXCEPTION,
  FRV_DATA_STORE_ERROR,
  FRV_DATA_ACCESS_EXCEPTION,
  FRV_DATA_ACCESS_MMU_MISS,
  FRV_DATA_ACCESS_ERROR,
  FRV_MP_EXCEPTION,
  FRV_FP_EXCEPTION,
  FRV_MEM_ADDRESS_NOT_ALIGNED,
  FRV_REGISTER_EXCEPTION,
  FRV_MP_DISABLED,
  FRV_FP_DISABLED,
  FRV_PRIVILEGED_INSTRUCTION,
  FRV_ILLEGAL_INSTRUCTION,
  FRV_INSTRUCTION_ACCESS_EXCEPTION,
  FRV_INSTRUCTION_ACCESS_ERROR,
  FRV_INSTRUCTION_ACCESS_MMU_MISS,
  FRV_COMPOUND_EXCEPTION,
  /* Break interrupt */
  FRV_BREAK_EXCEPTION,
  /* Reset interrupt */
  FRV_RESET,
  NUM_FRV_INTERRUPT_KINDS
};

/* FRV interrupt exception codes */
enum frv_ec
{
  FRV_EC_DATA_STORE_ERROR             = 0x00,
  FRV_EC_INSTRUCTION_ACCESS_MMU_MISS  = 0x01,
  FRV_EC_INSTRUCTION_ACCESS_ERROR     = 0x02,
  FRV_EC_INSTRUCTION_ACCESS_EXCEPTION = 0x03,
  FRV_EC_PRIVILEGED_INSTRUCTION       = 0x04,
  FRV_EC_ILLEGAL_INSTRUCTION          = 0x05,
  FRV_EC_FP_DISABLED                  = 0x06,
  FRV_EC_MP_DISABLED                  = 0x07,
  FRV_EC_MEM_ADDRESS_NOT_ALIGNED      = 0x0b,
  FRV_EC_REGISTER_EXCEPTION           = 0x0c,
  FRV_EC_FP_EXCEPTION                 = 0x0d,
  FRV_EC_MP_EXCEPTION                 = 0x0e,
  FRV_EC_DATA_ACCESS_ERROR            = 0x10,
  FRV_EC_DATA_ACCESS_MMU_MISS         = 0x11,
  FRV_EC_DATA_ACCESS_EXCEPTION        = 0x12,
  FRV_EC_DIVISION_EXCEPTION           = 0x13,
  FRV_EC_COMMIT_EXCEPTION             = 0x14,
  FRV_EC_NOT_EXECUTED                 = 0x1f,
  FRV_EC_INTERRUPT_LEVEL_1            = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_2            = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_3            = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_4            = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_5            = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_6            = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_7            = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_8            = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_9            = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_10           = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_11           = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_12           = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_13           = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_14           = FRV_EC_NOT_EXECUTED,
  FRV_EC_INTERRUPT_LEVEL_15           = FRV_EC_NOT_EXECUTED,
  FRV_EC_TRAP_INSTRUCTION             = FRV_EC_NOT_EXECUTED,
  FRV_EC_COMPOUND_EXCEPTION           = FRV_EC_NOT_EXECUTED,
  FRV_EC_BREAK_EXCEPTION              = FRV_EC_NOT_EXECUTED,
  FRV_EC_RESET                        = FRV_EC_NOT_EXECUTED
};

/* FR-V Interrupt.
   This struct contains enough information to describe a particular interrupt
   occurance.  */
struct frv_interrupt
{
  enum frv_interrupt_kind  kind;
  enum frv_ec              ec;
  enum frv_interrupt_class iclass;
  unsigned char deferred;
  unsigned char precise;
  unsigned char handler_offset;
};

/* FR-V Interrupt table.
   Describes the interrupts supported by the FR-V.  */
extern struct frv_interrupt frv_interrupt_table[];

/* FR-V Interrupt State.
   Interrupts are queued during execution of parallel insns and the interupt(s)
   to be handled determined by analysing the queue after each VLIW insn.  */
#define FRV_INTERRUPT_QUEUE_SIZE (4 * 4) /* 4 interrupts x 4 insns for now.  */

/* register_exception codes */
enum frv_rec
{
  FRV_REC_UNIMPLEMENTED = 0,
  FRV_REC_UNALIGNED     = 1
};

/* instruction_access_exception codes */
enum frv_iaec
{
  FRV_IAEC_PROTECT_VIOLATION = 1
};

/* data_access_exception codes */
enum frv_daec
{
  FRV_DAEC_PROTECT_VIOLATION = 1
};

/* division_exception ISR codes */
enum frv_dtt
{
  FRV_DTT_NO_EXCEPTION     = 0,
  FRV_DTT_DIVISION_BY_ZERO = 1,
  FRV_DTT_OVERFLOW         = 2,
  FRV_DTT_BOTH             = 3
};

/* data written during an insn causing an interrupt */
struct frv_data_written
{
  USI words[4]; /* Actual data in words */
  int length;   /* length of data written */
};

/* fp_exception info */
/* Trap codes for FSR0 and FQ registers.  */
enum frv_fsr_traps
{
  FSR_INVALID_OPERATION = 0x20,
  FSR_OVERFLOW          = 0x10,
  FSR_UNDERFLOW         = 0x08,
  FSR_DIVISION_BY_ZERO  = 0x04,
  FSR_INEXACT           = 0x02,
  FSR_DENORMAL_INPUT    = 0x01,
  FSR_NO_EXCEPTION      = 0
};

/* Floating point trap types for FSR.  */
enum frv_fsr_ftt
{
  FTT_NONE               = 0,
  FTT_IEEE_754_EXCEPTION = 1,
  FTT_UNIMPLEMENTED_FPOP = 3,
  FTT_SEQUENCE_ERROR     = 4,
  FTT_INVALID_FR         = 6,
  FTT_DENORMAL_INPUT     = 7
};

struct frv_fp_exception_info
{
  enum frv_fsr_traps fsr_mask; /* interrupt code for FSR */
  enum frv_fsr_ftt   ftt;      /* floating point trap type */
};

struct frv_interrupt_queue_element
{
  enum frv_interrupt_kind kind;      /* kind of interrupt */
  IADDR                   vpc;       /* address of insn causing interrupt */
  int                     slot;      /* VLIW slot containing the insn.  */
  USI                     eaddress;  /* address of data access */
  union {
    enum frv_rec  rec;               /* register exception code */
    enum frv_iaec iaec;              /* insn access exception code */
    enum frv_daec daec;              /* data access exception code */
    enum frv_dtt  dtt;               /* division exception code */
    struct frv_fp_exception_info fp_info;
    struct frv_data_written data_written;
  } u;
};

struct frv_interrupt_timer
{
  int enabled;
  unsigned value;
  unsigned current;
  enum frv_interrupt_kind interrupt;
};

struct frv_interrupt_state
{
  /* The interrupt queue */
  struct frv_interrupt_queue_element queue[FRV_INTERRUPT_QUEUE_SIZE];
  int queue_index;

  /* interrupt queue element causing imprecise interrupt.  */
  struct frv_interrupt_queue_element *imprecise_interrupt;

  /* interrupt timer.  */
  struct frv_interrupt_timer timer;

  /* The last data written stored as an array of words.  */
  struct frv_data_written data_written;

  /* The vliw slot of the insn causing the interrupt.  */
  int slot;

  /* target register index for non excepting insns.  */
#define NE_NOFLAG (-1)
  int ne_index;

  /* Accumulated NE flags for non excepting floating point insns.  */
  SI f_ne_flags[2];
};

extern struct frv_interrupt_state frv_interrupt_state;

/* Macros to manipulate the PSR.  */
#define GET_PSR() GET_H_SPR (H_SPR_PSR)

#define SET_PSR_ET(psr, et) (           \
  (psr) = ((psr) & ~0x1) | ((et) & 0x1) \
)

#define GET_PSR_PS(psr) (((psr) >> 1) & 1)

#define SET_PSR_S(psr, s) (                          \
  (psr) = ((psr) & ~(0x1 << 2)) | (((s) & 0x1) << 2) \
)

/* Macros to handle the ISR register.  */
#define GET_ISR() GET_H_SPR (H_SPR_ISR)
#define SET_ISR(isr) SET_H_SPR (H_SPR_ISR, (isr))

#define GET_ISR_EDE(isr) (((isr) >> 5) & 1)

#define GET_ISR_DTT(isr) (((isr) >> 3) & 3)
#define SET_ISR_DTT(isr, dtt) (                        \
  (isr) = ((isr) & ~(0x3 << 3)) | (((dtt) & 0x3) << 3) \
)

#define SET_ISR_AEXC(isr) ((isr) |= (1 << 2))

#define GET_ISR_EMAM(isr) ((isr) & 1)

/* Macros to handle exception status registers.
   Get and set the hardware directly, since we may be getting/setting fields
   which are not accessible to the user.  */
#define GET_ESR(index) \
  (CPU (h_spr[H_SPR_ESR0 + (index)]))
#define SET_ESR(index, esr) \
  (CPU (h_spr[H_SPR_ESR0 + (index)]) = (esr))

#define SET_ESR_VALID(esr) ((esr) |= 1)
#define CLEAR_ESR_VALID(esr) ((esr) &= ~1)

#define SET_ESR_EC(esr, ec) (                           \