lxdream 0.9.1| filename | test/asic.c |
| changeset | 815:866c103d72cd |
| prev | 753:1fe39c3a9bbc |
| author | nkeynes |
| date | Thu Dec 11 23:26:03 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Disable the generational translation cache - I've got no evidence that it actually helps performance, and it simplifies things to get rid of it (in particular, translated code doesn't have to worry about being moved now). |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 *
4 * General ASIC support code
5 *
6 * Copyright (c) 2006 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 #include "lib.h"
21 #define ASIC_BASE 0xA05F6000
22 #define ASIC_PIRQ(n) (ASIC_BASE + 0x900 + (n<<2))
23 #define ASIC_IRQA(n) (ASIC_BASE + 0x910 + (n<<2))
24 #define ASIC_IRQB(n) (ASIC_BASE + 0x920 + (n<<2))
25 #define ASIC_IRQC(n) (ASIC_BASE + 0x930 + (n<<2))
26 #define G2_FIFO (ASIC_BASE + 0x88C)
27 #define TIMEOUT 10000000
29 /**
30 * Wait for an ASIC event.
31 * @return 0 if the event occurred, otherwise -1 if the wait timed out.
32 */
33 int asic_wait( int event )
34 {
35 int n = event >> 5;
36 unsigned int mask = (1<< (event&0x1f));
37 int i;
38 for( i=0; i<TIMEOUT; i++ ) {
39 if( long_read(ASIC_PIRQ(n)) & mask ) {
40 return 0;
41 }
42 }
43 return -1; /* Timeout */
44 }
46 /**
47 * Wait for either of 2 ASIC events.
48 * @return the event id if the event occurred, otherwise -1 if the wait timed out.
49 */
50 int asic_wait2( int event1, int event2 )
51 {
52 int n1 = event1 >> 5;
53 int n2 = event2 >> 5;
54 unsigned int mask1 = (1<< (event1&0x1f));
55 unsigned int mask2 = (1<< (event2&0x1f));
56 int i;
57 for( i=0; i<TIMEOUT; i++ ) {
58 if( long_read(ASIC_PIRQ(n1)) & mask1 ) {
59 return event1;
60 }
61 if( long_read(ASIC_PIRQ(n2)) & mask2 ) {
62 return event2;
63 }
64 }
65 return -1; /* Timeout */
66 }
68 /**
69 * Clear all asic events
70 */
71 void asic_clear()
72 {
73 long_write(ASIC_PIRQ(0), 0xFFFFFFFF);
74 long_write(ASIC_PIRQ(1), 0xFFFFFFFF);
75 long_write(ASIC_PIRQ(2), 0xFFFFFFFF);
76 }
78 int asic_check( int event )
79 {
80 int n = event >> 5;
81 unsigned int mask = (1<< (event&0x1f));
82 return (long_read(ASIC_PIRQ(n)) & mask) != 0;
83 }
85 void asic_mask_all()
86 {
87 long_write(ASIC_IRQA(0), 0);
88 long_write(ASIC_IRQA(1), 0);
89 long_write(ASIC_IRQA(2), 0);
90 long_write(ASIC_IRQB(0), 0);
91 long_write(ASIC_IRQB(1), 0);
92 long_write(ASIC_IRQB(2), 0);
93 long_write(ASIC_IRQC(0), 0);
94 long_write(ASIC_IRQC(1), 0);
95 long_write(ASIC_IRQC(2), 0);
96 }
98 /**
99 * Print the contents of the ASIC event registers to the supplied FILE
100 */
101 void asic_dump( FILE *f )
102 {
103 int i,j;
104 fprintf( f, "Events: " );
105 for( i=0; i<3; i++ ) {
106 uint32_t val = long_read(ASIC_PIRQ(i));
107 for( j=0; j<32; j++ ) {
108 if( val & (1<<j) ) {
109 fprintf( f, "%d ", (i<<5)+j );
110 }
111 }
112 }
113 fprintf( f, "\n" );
114 }
116 /**
117 * Wait until the g2 fifo is clear to write more data.
118 */
119 int g2_fifo_wait()
120 {
121 int i;
122 for (i=0; i<0x1800; i++) {
123 if (!(long_read(G2_FIFO) & 0x11)) {
124 return 0;
125 }
127 }
128 return -1;
129 }
.