nkeynes@30: /**
nkeynes@561:  * $Id$
nkeynes@30:  * 
nkeynes@30:  * Interface definitions for the ARM CPU emulation core proper.
nkeynes@30:  *
nkeynes@30:  * Copyright (c) 2005 Nathan Keynes.
nkeynes@30:  *
nkeynes@30:  * This program is free software; you can redistribute it and/or modify
nkeynes@30:  * it under the terms of the GNU General Public License as published by
nkeynes@30:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@30:  * (at your option) any later version.
nkeynes@30:  *
nkeynes@30:  * This program is distributed in the hope that it will be useful,
nkeynes@30:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@30:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@30:  * GNU General Public License for more details.
nkeynes@30:  */
nkeynes@2: 
nkeynes@2: #ifndef dream_armcore_H
nkeynes@2: #define dream_armcore_H 1
nkeynes@2: 
nkeynes@2: #include "dream.h"
nkeynes@2: #include <stdint.h>
nkeynes@35: #include <stdio.h>
nkeynes@35: 
nkeynes@73: #define ARM_BASE_RATE 2 /* MHZ */
nkeynes@35: extern uint32_t arm_cpu_freq;
nkeynes@35: extern uint32_t arm_cpu_period;
nkeynes@2: 
nkeynes@7: #define ROTATE_RIGHT_LONG(operand,shift) ((((uint32_t)operand) >> shift) | ((operand<<(32-shift))) )
nkeynes@2: 
nkeynes@2: struct arm_registers {
nkeynes@11:     uint32_t r[16]; /* Current register bank */
nkeynes@11:     
nkeynes@11:     uint32_t cpsr;
nkeynes@11:     uint32_t spsr;
nkeynes@11:     
nkeynes@35:     /* Various banked versions of the registers. Note that these are used
nkeynes@35:      * to save the registers for the named bank when leaving the mode, they're
nkeynes@35:      * not actually used actively.
nkeynes@35:      **/
nkeynes@11:     uint32_t user_r[7]; /* User/System bank 8..14 */
nkeynes@35:     uint32_t svc_r[3]; /* SVC bank 13..14, SPSR */
nkeynes@35:     uint32_t abt_r[3]; /* ABT bank 13..14, SPSR */
nkeynes@35:     uint32_t und_r[3]; /* UND bank 13..14, SPSR */
nkeynes@35:     uint32_t irq_r[3]; /* IRQ bank 13..14, SPSR */
nkeynes@35:     uint32_t fiq_r[8]; /* FIQ bank 8..14, SPSR */
nkeynes@11:     
nkeynes@11:     uint32_t c,n,z,v,t;
nkeynes@11:     
nkeynes@11:     /* "fake" registers */
nkeynes@51:     uint32_t int_pending; /* Mask of CPSR_I and CPSR_F */
nkeynes@11:     uint32_t shift_c;  /* used for temporary storage of shifter results */
nkeynes@11:     uint32_t icount; /* Instruction counter */
nkeynes@86:     gboolean running; /* Indicates that the ARM is operational, as opposed to
nkeynes@86: 		       * halted */
nkeynes@2: };
nkeynes@2: 
nkeynes@2: #define CPSR_N 0x80000000 /* Negative flag */
nkeynes@2: #define CPSR_Z 0x40000000 /* Zero flag */
nkeynes@2: #define CPSR_C 0x20000000 /* Carry flag */
nkeynes@2: #define CPSR_V 0x10000000 /* Overflow flag */
nkeynes@2: #define CPSR_I 0x00000080 /* Interrupt disable bit */ 
nkeynes@2: #define CPSR_F 0x00000040 /* Fast interrupt disable bit */
nkeynes@2: #define CPSR_T 0x00000020 /* Thumb mode */
nkeynes@2: #define CPSR_MODE 0x0000001F /* Current execution mode */
nkeynes@37: #define CPSR_COMPACT_MASK 0x0FFFFFDF /* Mask excluding all separated flags */
nkeynes@2: 
nkeynes@35: #define MODE_USER 0x10 /* User mode */
nkeynes@35: #define MODE_FIQ   0x11 /* Fast IRQ mode */
nkeynes@35: #define MODE_IRQ  0x12 /* IRQ mode */
nkeynes@35: #define MODE_SVC  0x13 /* Supervisor mode */
nkeynes@35: #define MODE_ABT 0x17 /* Abort mode */
nkeynes@35: #define MODE_UND 0x1B /* Undefined mode */
nkeynes@35: #define MODE_SYS 0x1F /* System mode */
nkeynes@2: 
nkeynes@37: #define IS_PRIVILEGED_MODE() ((armr.cpsr & CPSR_MODE) != MODE_USER)
nkeynes@37: #define IS_EXCEPTION_MODE() (IS_PRIVILEGED_MODE() && (armr.cpsr & CPSR_MODE) != MODE_SYS)
nkeynes@46: #define IS_FIQ_MODE() ((armr.cpsr & CPSR_MODE) == MODE_FIQ)
nkeynes@37: 
nkeynes@2: extern struct arm_registers armr;
nkeynes@2: 
nkeynes@5: #define CARRY_FLAG (armr.cpsr&CPSR_C)
nkeynes@2: 
nkeynes@35: /* ARM core functions */
nkeynes@35: void arm_reset( void );
nkeynes@35: uint32_t arm_run_slice( uint32_t nanosecs );
nkeynes@35: void arm_save_state( FILE *f );
nkeynes@35: int arm_load_state( FILE *f );
nkeynes@35: gboolean arm_execute_instruction( void );
nkeynes@43: void arm_set_breakpoint( uint32_t pc, int type );
nkeynes@43: gboolean arm_clear_breakpoint( uint32_t pc, int type );
nkeynes@43: int arm_get_breakpoint( uint32_t pc );
nkeynes@35: 
nkeynes@11: /* ARM Memory */
nkeynes@37: uint32_t arm_read_long( uint32_t addr );
nkeynes@37: uint32_t arm_read_word( uint32_t addr );
nkeynes@37: uint32_t arm_read_byte( uint32_t addr );
nkeynes@37: uint32_t arm_read_long_user( uint32_t addr );
nkeynes@37: uint32_t arm_read_byte_user( uint32_t addr );
nkeynes@11: void arm_write_long( uint32_t addr, uint32_t val );
nkeynes@11: void arm_write_word( uint32_t addr, uint32_t val );
nkeynes@11: void arm_write_byte( uint32_t addr, uint32_t val );
nkeynes@37: void arm_write_long_user( uint32_t addr, uint32_t val );
nkeynes@37: void arm_write_byte_user( uint32_t addr, uint32_t val );
nkeynes@11: int32_t arm_read_phys_word( uint32_t addr );
nkeynes@14: int arm_has_page( uint32_t addr );
nkeynes@431: void arm_mem_init(void);
nkeynes@2: #endif /* !dream_armcore_H */