1 #include "u.h"
2 #include "lib.h"
3 #include "mem.h"
4 #include "dat.h"
5 #include "fns.h"
6 #include "io.h"
7
8 #include "dosfs.h"
9
10 static char *confname[MAXCONF];
11 static char *confval[MAXCONF];
12 static int nconf;
13
14 static char* defplan9ini =
15 "ether0=type=CS8900\r\n"
16 "vgasize=640x480x8\r\n"
17 "kernelpercent=40\r\n"
18 "console=1\r\nbaud=9600\r\n"
19 ;
20
21 extern char **ini;
22
23 char*
getconf(char * name)24 getconf(char *name)
25 {
26 int i;
27
28 for(i = 0; i < nconf; i++)
29 if(strcmp(confname[i], name) == 0)
30 return confval[i];
31 return 0;
32 }
33
34 /*
35 * read configuration file
36 */
37 int
plan9ini(Dos * dos,char * val)38 plan9ini(Dos *dos, char *val)
39 {
40 Dosfile rc;
41 int i, n;
42 char *cp, *p, *q, *line[MAXCONF];
43
44 cp = BOOTARGS;
45 if(dos) {
46 if(dosstat(dos, *ini, &rc) <= 0)
47 return -1;
48
49 *cp = 0;
50 n = dosread(&rc, cp, BOOTARGSLEN-1);
51 if(n <= 0)
52 return -1;
53 cp[n] = 0;
54 } else if(val != nil){
55 if(memchr(val, 0, BOOTARGSLEN-1) == nil)
56 return -1;
57 print("Using flash configuration\n");
58 strcpy(cp, val);
59 n = strlen(cp);
60 }else{
61 print("Using default configuration\n");
62 strcpy(cp, defplan9ini);
63 n = strlen(cp);
64 }
65
66 /*
67 * Make a working copy.
68 * We could change this to pass the parsed strings
69 * to the booted programme instead of the raw
70 * string, then it only gets done once.
71 */
72 memmove(cp+BOOTARGSLEN, cp, n+1);
73 cp += BOOTARGSLEN;
74
75 /*
76 * Strip out '\r', change '\t' -> ' '.
77 */
78 p = cp;
79 for(q = cp; *q; q++){
80 if(*q == '\r')
81 continue;
82 if(*q == '\t')
83 *q = ' ';
84 *p++ = *q;
85 }
86 *p = 0;
87 n = getcfields(cp, line, MAXCONF, "\n");
88 for(i = 0; i < n; i++){
89 cp = strchr(line[i], '=');
90 if(cp == 0)
91 continue;
92 *cp++ = 0;
93 if(cp - line[i] >= NAMELEN+1)
94 *(line[i]+NAMELEN-1) = 0;
95 confname[nconf] = line[i];
96 confval[nconf] = cp;
97 nconf++;
98 }
99 return 0;
100 }
101
102 static int
parseether(uchar * to,char * from)103 parseether(uchar *to, char *from)
104 {
105 char nip[4];
106 char *p;
107 int i;
108
109 p = from;
110 while(*p == ' ')
111 ++p;
112 for(i = 0; i < 6; i++){
113 if(*p == 0)
114 return -1;
115 nip[0] = *p++;
116 if(*p == 0)
117 return -1;
118 nip[1] = *p++;
119 nip[2] = 0;
120 to[i] = strtoul(nip, 0, 16);
121 if(*p == ':')
122 p++;
123 }
124 return 0;
125 }
126
127 int
isaconfig(char * class,int ctlrno,ISAConf * isa)128 isaconfig(char *class, int ctlrno, ISAConf *isa)
129 {
130 char cc[NAMELEN], *p, *q, *r;
131 int n;
132
133 sprint(cc, "%s%d", class, ctlrno);
134 for(n = 0; n < nconf; n++){
135 if(strncmp(confname[n], cc, NAMELEN))
136 continue;
137 isa->nopt = 0;
138 p = confval[n];
139 while(*p){
140 while(*p == ' ' || *p == '\t')
141 p++;
142 if(*p == '\0')
143 break;
144 if(strncmp(p, "type=", 5) == 0){
145 p += 5;
146 for(q = isa->type; q < &isa->type[NAMELEN-1]; q++){
147 if(*p == '\0' || *p == ' ' || *p == '\t')
148 break;
149 *q = *p++;
150 }
151 *q = '\0';
152 }
153 else if(strncmp(p, "port=", 5) == 0)
154 isa->port = strtoul(p+5, &p, 0);
155 else if(strncmp(p, "irq=", 4) == 0)
156 isa->irq = strtoul(p+4, &p, 0);
157 else if(strncmp(p, "mem=", 4) == 0)
158 isa->mem = strtoul(p+4, &p, 0);
159 else if(strncmp(p, "size=", 5) == 0)
160 isa->size = strtoul(p+5, &p, 0);
161 else if(strncmp(p, "ea=", 3) == 0){
162 if(parseether(isa->ea, p+3) == -1)
163 memset(isa->ea, 0, 6);
164 }
165 else if(isa->nopt < NISAOPT){
166 r = isa->opt[isa->nopt];
167 while(*p && *p != ' ' && *p != '\t'){
168 *r++ = *p++;
169 if(r-isa->opt[isa->nopt] >= ISAOPTLEN-1)
170 break;
171 }
172 *r = '\0';
173 isa->nopt++;
174 }
175 while(*p && *p != ' ' && *p != '\t')
176 p++;
177 }
178 return 1;
179 }
180 return 0;
181 }
182