lxdream 0.9.1| filename | src/cpu.h |
| changeset | 736:a02d1475ccfd |
| prev | 586:2a3ba82cf243 |
| next | 998:1754a8c6a9cf |
| author | nkeynes |
| date | Wed Nov 05 10:05:08 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Fix (extremely boneheaded) failure to convert pc to physical address before storing in the translation cache (in other words, the translation cache was effectively disabled for MMU code). MMU code is now about 3 times faster... |
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1 /**
2 * $Id$
3 *
4 * Generic CPU definitions, primarily for providing information to the GUI.
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 lxdream_cpu_H
20 #define lxdream_cpu_H 1
22 #include "lxdream.h"
23 #include "mem.h"
25 #ifdef __cplusplus
26 extern "C" {
27 #endif
29 /**
30 * Disassembly function pointer typedef.
31 *
32 * @param pc Address to disassemble
33 * @param buffer String buffer to write disassembly into
34 * @param buflen Maximum length of buffer
35 * @return next address to disassemble
36 */
37 typedef uint32_t (*disasm_func_t)(uint32_t pc, char *buffer, int buflen, char *opcode );
39 #define REG_INT 0
40 #define REG_FLT 1
41 #define REG_SPECIAL 2
43 /**
44 * Structure that defines a single register in a CPU for display purposes.
45 */
46 typedef struct reg_desc_struct {
47 char *name;
48 int type;
49 void *value;
50 } reg_desc_t;
52 /**
53 * CPU definition structure - basic information and support functions.
54 */
55 typedef struct cpu_desc_struct {
56 char *name; /* CPU Name */
57 disasm_func_t disasm_func; /* Disassembly function */
58 gboolean (*step_func)(); /* Single step function */
59 int (*is_valid_page_func)(uint32_t); /* Test for valid memory page */
60 void (*set_breakpoint)(uint32_t, breakpoint_type_t);
61 gboolean (*clear_breakpoint)(uint32_t, breakpoint_type_t);
62 int (*get_breakpoint)(uint32_t);
63 size_t instr_size; /* Size of instruction */
64 char *regs; /* Pointer to start of registers */
65 size_t regs_size; /* Size of register structure in bytes */
66 const struct reg_desc_struct *regs_info; /* Description of all registers */
67 uint32_t *pc; /* Pointer to PC register */
68 } const *cpu_desc_t;
70 #ifdef __cplusplus
71 }
72 #endif
74 #endif /* !lxdream_cpu_H */
.