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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
** atariints.h -- Atari Linux interrupt handling structs and prototypes
**
** Copyright 1994 by Bj�rn Brauel
**
** 5/2/94 Roman Hodek:
** TT interrupt definitions added.
**
** 12/02/96: (Roman)
** Adapted to new int handling scheme (see ataints.c); revised numbering
**
** This file is subject to the terms and conditions of the GNU General Public
** License. See the file COPYING in the main directory of this archive
** for more details.
**
*/
#ifndef _LINUX_ATARIINTS_H_
#define _LINUX_ATARIINTS_H_
#include <asm/irq.h>
#include <asm/atarihw.h>
/*
** Atari Interrupt sources.
**
*/
#define STMFP_SOURCE_BASE 8
#define TTMFP_SOURCE_BASE 24
#define SCC_SOURCE_BASE 40
#define VME_SOURCE_BASE 56
#define VME_MAX_SOURCES 16
#define NUM_ATARI_SOURCES (VME_SOURCE_BASE+VME_MAX_SOURCES-STMFP_SOURCE_BASE)
/* convert vector number to int source number */
#define IRQ_VECTOR_TO_SOURCE(v) ((v) - ((v) < 0x20 ? 0x18 : (0x40-8)))
/* convert irq_handler index to vector number */
#define IRQ_SOURCE_TO_VECTOR(i) ((i) + ((i) < 8 ? 0x18 : (0x40-8)))
/* interrupt service types */
#define IRQ_TYPE_SLOW 0
#define IRQ_TYPE_FAST 1
#define IRQ_TYPE_PRIO 2
/* ST-MFP interrupts */
#define IRQ_MFP_BUSY (8)
#define IRQ_MFP_DCD (9)
#define IRQ_MFP_CTS (10)
#define IRQ_MFP_GPU (11)
#define IRQ_MFP_TIMD (12)
#define IRQ_MFP_TIMC (13)
#define IRQ_MFP_ACIA (14)
#define IRQ_MFP_FDC (15)
#define IRQ_MFP_ACSI IRQ_MFP_FDC
#define IRQ_MFP_FSCSI IRQ_MFP_FDC
#define IRQ_MFP_IDE IRQ_MFP_FDC
#define IRQ_MFP_TIMB (16)
#define IRQ_MFP_SERERR (17)
#define IRQ_MFP_SEREMPT (18)
#define IRQ_MFP_RECERR (19)
#define IRQ_MFP_RECFULL (20)
#define IRQ_MFP_TIMA (21)
#define IRQ_MFP_RI (22)
#define IRQ_MFP_MMD (23)
/* TT-MFP interrupts */
#define IRQ_TT_MFP_IO0 (24)
#define IRQ_TT_MFP_IO1 (25)
#define IRQ_TT_MFP_SCC (26)
#define IRQ_TT_MFP_RI (27)
#define IRQ_TT_MFP_TIMD (28)
#define IRQ_TT_MFP_TIMC (29)
#define IRQ_TT_MFP_DRVRDY (30)
#define IRQ_TT_MFP_SCSIDMA (31)
#define IRQ_TT_MFP_TIMB (32)
#define IRQ_TT_MFP_SERERR (33)
#define IRQ_TT_MFP_SEREMPT (34)
#define IRQ_TT_MFP_RECERR (35)
#define IRQ_TT_MFP_RECFULL (36)
#define IRQ_TT_MFP_TIMA (37)
#define IRQ_TT_MFP_RTC (38)
#define IRQ_TT_MFP_SCSI (39)
/* SCC interrupts */
#define IRQ_SCCB_TX (40)
#define IRQ_SCCB_STAT (42)
#define IRQ_SCCB_RX (44)
#define IRQ_SCCB_SPCOND (46)
#define IRQ_SCCA_TX (48)
#define IRQ_SCCA_STAT (50)
#define IRQ_SCCA_RX (52)
#define IRQ_SCCA_SPCOND (54)
#define INT_CLK 24576 /* CLK while int_clk =2.456MHz and divide = 100 */
#define INT_TICKS 246 /* to make sched_time = 99.902... HZ */
#define MFP_ENABLE 0
#define MFP_PENDING 1
#define MFP_SERVICE 2
#define MFP_MASK 3
/* Utility functions for setting/clearing bits in the interrupt registers of
* the MFP. 'type' should be constant, if 'irq' is constant, too, code size is
* reduced. set_mfp_bit() is nonsense for PENDING and SERVICE registers. */
static inline int get_mfp_bit( unsigned irq, int type )
{ unsigned char mask, *reg;
mask = 1 << (irq & 7);
reg = (unsigned char *)&mfp.int_en_a + type*4 +
((irq & 8) >> 2) + (((irq-8) & 16) << 3);
return( *reg & mask );
}
static inline void set_mfp_bit( unsigned irq, int type )
{ unsigned char mask, *reg;
mask = 1 << (irq & 7);
reg = (unsigned char *)&mfp.int_en_a + type*4 +
((irq & 8) >> 2) + (((irq-8) & 16) << 3);
__asm__ __volatile__ ( "orb %0,%1"
: : "di" (mask), "m" (*reg) : "memory" );
}
static inline void clear_mfp_bit( unsigned irq, int type )
{ unsigned char mask, *reg;
mask = ~(1 << (irq & 7));
reg = (unsigned char *)&mfp.int_en_a + type*4 +
((irq & 8) >> 2) + (((irq-8) & 16) << 3);
if (type == MFP_PENDING || type == MFP_SERVICE)
__asm__ __volatile__ ( "moveb %0,%1"
: : "di" (mask), "m" (*reg) : "memory" );
else
__asm__ __volatile__ ( "andb %0,%1"
: : "di" (mask), "m" (*reg) : "memory" );
}
/*
* {en,dis}able_irq have the usual semantics of temporary blocking the
* interrupt, but not loosing requests that happen between disabling and
* enabling. This is done with the MFP mask registers.
*/
static inline void atari_enable_irq( unsigned irq )
{
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
set_mfp_bit( irq, MFP_MASK );
}
static inline void atari_disable_irq( unsigned irq )
{
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
clear_mfp_bit( irq, MFP_MASK );
}
/*
* In opposite to {en,dis}able_irq, requests between turn{off,on}_irq are not
* "stored"
*/
static inline void atari_turnon_irq( unsigned irq )
{
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
set_mfp_bit( irq, MFP_ENABLE );
}
static inline void atari_turnoff_irq( unsigned irq )
{
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
clear_mfp_bit( irq, MFP_ENABLE );
clear_mfp_bit( irq, MFP_PENDING );
}
static inline void atari_clear_pending_irq( unsigned irq )
{
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
clear_mfp_bit( irq, MFP_PENDING );
}
static inline int atari_irq_pending( unsigned irq )
{
if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return( 0 );
return( get_mfp_bit( irq, MFP_PENDING ) );
}
unsigned long atari_register_vme_int( void );
void atari_unregister_vme_int( unsigned long );
#endif /* linux/atariints.h */
|
