1 /*
2 * dump_psb. (c) 2004, Dave Jones, Red Hat Inc.
3 * Licensed under the GPL v2.
4 */
5
6 #include <fcntl.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <unistd.h>
11
12 #define _GNU_SOURCE
13 #include <getopt.h>
14
15 #include <sys/mman.h>
16
17 #define LEN (0x100000 - 0xc0000)
18 #define OFFSET (0xc0000)
19
20 #ifndef __packed
21 #define __packed __attribute((packed))
22 #endif
23
24 static long relevant;
25
26 static const int fid_to_mult[32] = {
27 110, 115, 120, 125, 50, 55, 60, 65,
28 70, 75, 80, 85, 90, 95, 100, 105,
29 30, 190, 40, 200, 130, 135, 140, 210,
30 150, 225, 160, 165, 170, 180, -1, -1,
31 };
32
33 static const int vid_to_voltage[32] = {
34 2000, 1950, 1900, 1850, 1800, 1750, 1700, 1650,
35 1600, 1550, 1500, 1450, 1400, 1350, 1300, 0,
36 1275, 1250, 1225, 1200, 1175, 1150, 1125, 1100,
37 1075, 1050, 1024, 1000, 975, 950, 925, 0,
38 };
39
40 struct psb_header {
41 char signature[10];
42 u_char version;
43 u_char flags;
44 u_short settlingtime;
45 u_char res1;
46 u_char numpst;
47 } __packed;
48
49 struct pst_header {
50 u_int32_t cpuid;
51 u_char fsb;
52 u_char maxfid;
53 u_char startvid;
54 u_char numpstates;
55 } __packed;
56
57 static u_int fsb;
58 static u_int sgtc;
59
60 static int
decode_pst(char * p,int npstates)61 decode_pst(char *p, int npstates)
62 {
63 int i;
64 int freq, fid, vid;
65
66 for (i = 0; i < npstates; ++i) {
67 fid = *p++;
68 vid = *p++;
69 freq = 100 * fid_to_mult[fid] * fsb;
70
71 printf(" %2d %8dkHz FID %02x (%2d.%01d) VID %02x (%4dmV)\n",
72 i,
73 freq,
74 fid, fid_to_mult[fid]/10, fid_to_mult[fid]%10,
75 vid, vid_to_voltage[vid]);
76 }
77
78 return 0;
79 }
80
81 static
decode_psb(char * p,int numpst)82 void decode_psb(char *p, int numpst)
83 {
84 int i;
85 struct psb_header *psb;
86 struct pst_header *pst;
87
88 psb = (struct psb_header*) p;
89
90 if (psb->version != 0x12)
91 return;
92
93 printf("PSB version: %hhx flags: %hhx settling time %hhuus res1 %hhx num pst %hhu\n",
94 psb->version,
95 psb->flags,
96 psb->settlingtime,
97 psb->res1,
98 psb->numpst);
99 sgtc = psb->settlingtime * 100;
100
101 if (sgtc < 10000)
102 sgtc = 10000;
103
104 p = ((char *) psb) + sizeof(struct psb_header);
105
106 if (numpst < 0)
107 numpst = psb->numpst;
108 else
109 printf("Overriding number of pst :%d\n", numpst);
110
111 for (i = 0; i < numpst; i++) {
112 pst = (struct pst_header*) p;
113
114 if (relevant != 0) {
115 if (relevant!= pst->cpuid)
116 goto next_one;
117 }
118
119 printf(" PST %d cpuid %.3x fsb %hhu mfid %hhx svid %hhx numberstates %hhu\n",
120 i+1,
121 pst->cpuid,
122 pst->fsb,
123 pst->maxfid,
124 pst->startvid,
125 pst->numpstates);
126
127 fsb = pst->fsb;
128 decode_pst(p + sizeof(struct pst_header), pst->numpstates);
129
130 next_one:
131 p += sizeof(struct pst_header) + 2*pst->numpstates;
132 }
133
134 }
135
136 static struct option info_opts[] = {
137 {"numpst", no_argument, NULL, 'n'},
138 };
139
print_help(void)140 void print_help(void)
141 {
142 printf ("Usage: dump_psb [options]\n");
143 printf ("Options:\n");
144 printf (" -n, --numpst Set number of PST tables to scan\n");
145 printf (" -r, --relevant Only display PSTs relevant to cpuid N\n");
146 }
147
148 int
main(int argc,char * argv[])149 main(int argc, char *argv[])
150 {
151 int fd;
152 int numpst=-1;
153 int ret=0, cont=1;
154 char *mem = NULL;
155 char *p;
156
157 do {
158 ret = getopt_long(argc, argv, "hr:n:", info_opts, NULL);
159 switch (ret){
160 case '?':
161 case 'h':
162 print_help();
163 cont = 0;
164 break;
165 case 'r':
166 relevant = strtol(optarg, NULL, 16);
167 break;
168 case 'n':
169 numpst = strtol(optarg, NULL, 10);
170 break;
171 case -1:
172 cont = 0;
173 break;
174 }
175
176 } while(cont);
177
178 fd = open("/dev/mem", O_RDONLY);
179 if (fd < 0) {
180 printf ("Couldn't open /dev/mem. Are you root?\n");
181 exit(1);
182 }
183
184 mem = mmap(mem, 0x100000 - 0xc0000, PROT_READ, MAP_SHARED, fd, 0xc0000);
185 close(fd);
186
187 for (p = mem; p - mem < LEN; p+=16) {
188 if (memcmp(p, "AMDK7PNOW!", 10) == 0) {
189 decode_psb(p, numpst);
190 break;
191 }
192 }
193
194 munmap(mem, LEN);
195 return 0;
196 }
197