host_ptn64.c
3.42 KB
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
/**************************************************************************
* *
* Copyright (C) 1997, Kyoto Micro Computer Co.,LTD. *
* *
**************************************************************************/
#include <os.h>
#include <piint.h>
#ifndef _FINALROM
#if 0
static volatile unsigned *ptwtmode= (unsigned *)0xbff08014;
#endif
static volatile unsigned *ptstat= (unsigned *)0xbff08004;
static volatile unsigned *ptport= (unsigned *)0xbff08000;
static volatile unsigned *n64piok= (unsigned *)0xa4600010;
static OSMesgQueue waitPtQueue;
static OSMesg waitPtQueueBuf;
static u32 isWaitPtQueueCreated = 0;
/*
* Now, we set 1 msec for the interval timer.
*/
#define WAIT_CYCLES OS_USEC_TO_CYCLES(1000)
/*
* Create "waitPtQueue" which is used for the interval timer.
* We only call this routine once (first time either osReadHost_pt()
* or osWriteHost_pt() is called).
*/
static void createWaitPtQueue(void)
{
osCreateMesgQueue(&waitPtQueue, &waitPtQueueBuf, 1);
isWaitPtQueueCreated = 1;
}
/*
* Wait for the partner status register's "bit" bit becomes 1.
* We use an interval timer to wait instead of polling.
*/
static u32 getPT_wait(void)
{
OSTimer waitTimer;
for(;;){
while((*n64piok & 3)!=0) ;
if((*ptstat & 2)!=0){
return *ptport;
}
__osPiRelAccess();
osRecvMesg(&waitPtQueue, NULL, OS_MESG_NOBLOCK);
osSetTimer(&waitTimer,WAIT_CYCLES,0, &waitPtQueue, NULL);
osRecvMesg(&waitPtQueue, NULL, OS_MESG_BLOCK);
__osPiGetAccess();
}
}
static void putPT(u32 c)
{
while((*n64piok & 3)!=0) ;
while((*ptstat & 4)==0) ;
*ptport=c;
}
static u32 getPT(void)
{
while((*n64piok & 3)!=0) ;
while((*ptstat & 2)==0) ;
return *ptport;
}
void osReadHost_pt(void *dramAddr, u32 nbytes)
{
u8 *tPtr;
u32 buf[256],*bp,data;
u32 ct,ct1,ct1_bak,shift;
u32 cmd,size;
if(nbytes==0) return;
if(!isWaitPtQueueCreated){
createWaitPtQueue();
}
__osPiGetAccess();
putPT(0x82);
cmd=getPT_wait();
size=getPT();
if(cmd!=2){
nbytes=(u32)-1;
}
putPT(nbytes);
if(size!=nbytes){
goto osReadHost_ret;
}
tPtr=(u8*)dramAddr;
ct=nbytes/4;
while(ct){
if(ct>sizeof(buf)/4){
ct1_bak=ct1=sizeof(buf)/sizeof(u32);
ct -= sizeof(buf)/sizeof(u32);
}
else{
ct1_bak=ct1=ct;
ct=0;
}
bp=buf;
while(ct1){
*(bp++)=getPT();
--ct1;
}
memcpy(tPtr,buf,ct1_bak*sizeof(u32));
tPtr+=ct1_bak*sizeof(u32);
}
nbytes &= 3;
if(nbytes){
data=getPT();
shift=24;
do{
*(tPtr++)=(u8)(data>>shift);
--nbytes;
shift -= 8;
}while(nbytes) ;
}
osReadHost_ret:
__osPiRelAccess();
return;
}
void osWriteHost_pt(void *dramAddr, u32 nbytes)
{
u8 *tPtr;
u32 buf[256],*bp;
u32 ct,ct1,ct1_bak;
u32 cmd,size;
if(nbytes==0) return;
if(!isWaitPtQueueCreated){
createWaitPtQueue();
}
__osPiGetAccess();
putPT(0x82);
cmd=getPT_wait();
size=getPT();
if(cmd!=3){
nbytes=(u32)-1;
}
putPT(nbytes);
if(size!=nbytes){
goto osWriteHost_ret;
}
tPtr=(u8*)dramAddr;
ct=(nbytes+3)/4;
while(ct){
if(ct>sizeof(buf)/4){
ct1_bak=ct1=sizeof(buf)/sizeof(u32);
ct -= sizeof(buf)/sizeof(u32);
}
else{
ct1_bak=ct1=ct;
ct=0;
}
memcpy(bp=buf,tPtr,ct1_bak*sizeof(u32));
while(ct1){
putPT(*(bp++));
--ct1;
}
tPtr+=ct1_bak*sizeof(u32);
}
osWriteHost_ret:
__osPiRelAccess();
return;
}
#endif