lxdream 0.9.1| filename | src/aica/armcore.h |
| changeset | 586:2a3ba82cf243 |
| prev | 431:248dd77a9e44 |
| next | 736:a02d1475ccfd |
| author | nkeynes |
| date | Sun Jun 22 06:49:00 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Big cleanup of the command-line options Add an actual manpage (*gasp*) |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 *
4 * Interface definitions for the ARM CPU emulation core proper.
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
19 #ifndef dream_armcore_H
20 #define dream_armcore_H 1
22 #include "lxdream.h"
23 #include "mem.h"
24 #include <stdint.h>
25 #include <stdio.h>
27 #define ARM_BASE_RATE 2 /* MHZ */
28 extern uint32_t arm_cpu_freq;
29 extern uint32_t arm_cpu_period;
31 #define ROTATE_RIGHT_LONG(operand,shift) ((((uint32_t)operand) >> shift) | ((operand<<(32-shift))) )
33 struct arm_registers {
34 uint32_t r[16]; /* Current register bank */
36 uint32_t cpsr;
37 uint32_t spsr;
39 /* Various banked versions of the registers. Note that these are used
40 * to save the registers for the named bank when leaving the mode, they're
41 * not actually used actively.
42 **/
43 uint32_t user_r[7]; /* User/System bank 8..14 */
44 uint32_t svc_r[3]; /* SVC bank 13..14, SPSR */
45 uint32_t abt_r[3]; /* ABT bank 13..14, SPSR */
46 uint32_t und_r[3]; /* UND bank 13..14, SPSR */
47 uint32_t irq_r[3]; /* IRQ bank 13..14, SPSR */
48 uint32_t fiq_r[8]; /* FIQ bank 8..14, SPSR */
50 uint32_t c,n,z,v,t;
52 /* "fake" registers */
53 uint32_t int_pending; /* Mask of CPSR_I and CPSR_F */
54 uint32_t shift_c; /* used for temporary storage of shifter results */
55 uint32_t icount; /* Instruction counter */
56 gboolean running; /* Indicates that the ARM is operational, as opposed to
57 * halted */
58 };
60 #define CPSR_N 0x80000000 /* Negative flag */
61 #define CPSR_Z 0x40000000 /* Zero flag */
62 #define CPSR_C 0x20000000 /* Carry flag */
63 #define CPSR_V 0x10000000 /* Overflow flag */
64 #define CPSR_I 0x00000080 /* Interrupt disable bit */
65 #define CPSR_F 0x00000040 /* Fast interrupt disable bit */
66 #define CPSR_T 0x00000020 /* Thumb mode */
67 #define CPSR_MODE 0x0000001F /* Current execution mode */
68 #define CPSR_COMPACT_MASK 0x0FFFFFDF /* Mask excluding all separated flags */
70 #define MODE_USER 0x10 /* User mode */
71 #define MODE_FIQ 0x11 /* Fast IRQ mode */
72 #define MODE_IRQ 0x12 /* IRQ mode */
73 #define MODE_SVC 0x13 /* Supervisor mode */
74 #define MODE_ABT 0x17 /* Abort mode */
75 #define MODE_UND 0x1B /* Undefined mode */
76 #define MODE_SYS 0x1F /* System mode */
78 #define IS_PRIVILEGED_MODE() ((armr.cpsr & CPSR_MODE) != MODE_USER)
79 #define IS_EXCEPTION_MODE() (IS_PRIVILEGED_MODE() && (armr.cpsr & CPSR_MODE) != MODE_SYS)
80 #define IS_FIQ_MODE() ((armr.cpsr & CPSR_MODE) == MODE_FIQ)
82 extern struct arm_registers armr;
84 #define CARRY_FLAG (armr.cpsr&CPSR_C)
86 /* ARM core functions */
87 void arm_reset( void );
88 uint32_t arm_run_slice( uint32_t nanosecs );
89 void arm_save_state( FILE *f );
90 int arm_load_state( FILE *f );
91 gboolean arm_execute_instruction( void );
92 void arm_set_breakpoint( uint32_t pc, breakpoint_type_t type );
93 gboolean arm_clear_breakpoint( uint32_t pc, breakpoint_type_t type );
94 int arm_get_breakpoint( uint32_t pc );
96 /* ARM Memory */
97 uint32_t arm_read_long( uint32_t addr );
98 uint32_t arm_read_word( uint32_t addr );
99 uint32_t arm_read_byte( uint32_t addr );
100 uint32_t arm_read_long_user( uint32_t addr );
101 uint32_t arm_read_byte_user( uint32_t addr );
102 void arm_write_long( uint32_t addr, uint32_t val );
103 void arm_write_word( uint32_t addr, uint32_t val );
104 void arm_write_byte( uint32_t addr, uint32_t val );
105 void arm_write_long_user( uint32_t addr, uint32_t val );
106 void arm_write_byte_user( uint32_t addr, uint32_t val );
107 int32_t arm_read_phys_word( uint32_t addr );
108 int arm_has_page( uint32_t addr );
109 void arm_mem_init(void);
110 #endif /* !dream_armcore_H */
.