1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/* interrupts.h -- 68HC11 Interrupts Emulation
Copyright 1999, 2000 Free Software Foundation, Inc.
Written by Stephane Carrez (stcarrez@worldnet.fr)
This file is part of GDB, GAS, and the GNU binutils.
GDB, GAS, and the GNU binutils are free software; you can redistribute
them and/or modify them under the terms of the GNU General Public
License as published by the Free Software Foundation; either version
1, or (at your option) any later version.
GDB, GAS, and the GNU binutils are distributed in the hope that they
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 file; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifndef _M6811_SIM_INTERRUPTS_H
#define _M6811_SIM_INTERRUPTS_H
/* Definition of 68HC11 interrupts. These enum are used as an index
in the interrupt table. */
enum M6811_INT
{
M6811_INT_RESERVED1 = 0,
M6811_INT_RESERVED2,
M6811_INT_RESERVED3,
M6811_INT_RESERVED4,
M6811_INT_RESERVED5,
M6811_INT_RESERVED6,
M6811_INT_RESERVED7,
M6811_INT_RESERVED8,
M6811_INT_RESERVED9,
M6811_INT_RESERVED10,
M6811_INT_RESERVED11,
M6811_INT_SCI,
M6811_INT_SPI,
M6811_INT_AINPUT,
M6811_INT_AOVERFLOW,
M6811_INT_TCTN,
M6811_INT_OUTCMP5,
M6811_INT_OUTCMP4,
M6811_INT_OUTCMP3,
M6811_INT_OUTCMP2,
M6811_INT_OUTCMP1,
M6811_INT_INCMP3,
M6811_INT_INCMP2,
M6811_INT_INCMP1,
M6811_INT_RT,
M6811_INT_IRQ,
M6811_INT_XIRQ,
M6811_INT_SWI,
M6811_INT_ILLEGAL,
M6811_INT_COPRESET,
M6811_INT_COPFAIL,
M6811_INT_RESET,
M6811_INT_NUMBER
};
/* Structure to describe how to recognize an interrupt in the
68hc11 IO regs. */
struct interrupt_def
{
enum M6811_INT int_number;
unsigned char int_paddr;
unsigned char int_mask;
unsigned char enable_paddr;
unsigned char enabled_mask;
};
/* Management of 68HC11 interrupts:
- We use a table of 'interrupt_def' to describe the interrupts that must be
raised depending on IO register flags (enable and present flags).
- We keep a mask of pending interrupts. This mask is refreshed by
calling 'interrupts_update_pending'. It must be refreshed each time
an IO register is changed.
- 'interrupts_process' must be called after each insn. It has two purposes:
first it maintains a min/max count of CPU cycles between which interrupts
are masked; second it checks for pending interrupts and raise one if
interrupts are enabled. */
struct interrupts {
struct _sim_cpu *cpu;
/* Mask of current pending interrupts. */
unsigned long pending_mask;
/* Address of vector table. This is set depending on the
68hc11 init mode. */
uint16 vectors_addr;
/* Priority order of interrupts. This is controlled by setting the HPRIO
IO register. */
enum M6811_INT interrupt_order[M6811_INT_NUMBER];
/* Simulator statistics to report useful debug information to users. */
/* - Max/Min number of CPU cycles executed with interrupts masked. */
signed64 start_mask_cycle;
signed64 min_mask_cycles;
signed64 max_mask_cycles;
/* - Same for XIRQ. */
signed64 xirq_start_mask_cycle;
signed64 xirq_min_mask_cycles;
signed64 xirq_max_mask_cycles;
/* - Total number of interrupts raised. */
unsigned long nb_interrupts_raised;
};
extern int interrupts_initialize (struct _sim_cpu* cpu);
extern void interrupts_update_pending (struct interrupts* interrupts);
extern int interrupts_get_current (struct interrupts* interrupts);
extern int interrupts_process (struct interrupts* interrupts);
extern void interrupts_raise (struct interrupts* interrupts,
enum M6811_INT number);
extern void interrupts_info (SIM_DESC sd,
struct interrupts* interrupts);
#endif
|
