Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / tools / power / cpupower / debug / i386 / dump_psb.c
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
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
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         {.name = "numpst",      .has_arg=no_argument,   .flag=NULL, .val='n'},
138 };
139
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
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 }