diff options
Diffstat (limited to 'tools/power/cpupower/debug/i386/dump_psb.c')
| -rw-r--r-- | tools/power/cpupower/debug/i386/dump_psb.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/tools/power/cpupower/debug/i386/dump_psb.c b/tools/power/cpupower/debug/i386/dump_psb.c new file mode 100644 index 00000000000..8d6a4751425 --- /dev/null +++ b/tools/power/cpupower/debug/i386/dump_psb.c @@ -0,0 +1,196 @@ +/* + * dump_psb. (c) 2004, Dave Jones, Red Hat Inc. + * Licensed under the GPL v2. + */ + +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#define _GNU_SOURCE +#include <getopt.h> + +#include <sys/mman.h> + +#define LEN (0x100000 - 0xc0000) +#define OFFSET (0xc0000) + +#ifndef __packed +#define __packed __attribute((packed)) +#endif + +static long relevant; + +static const int fid_to_mult[32] = { + 110, 115, 120, 125, 50, 55, 60, 65, + 70, 75, 80, 85, 90, 95, 100, 105, + 30, 190, 40, 200, 130, 135, 140, 210, + 150, 225, 160, 165, 170, 180, -1, -1, +}; + +static const int vid_to_voltage[32] = { + 2000, 1950, 1900, 1850, 1800, 1750, 1700, 1650, + 1600, 1550, 1500, 1450, 1400, 1350, 1300, 0, + 1275, 1250, 1225, 1200, 1175, 1150, 1125, 1100, + 1075, 1050, 1024, 1000, 975, 950, 925, 0, +}; + +struct psb_header { + char signature[10]; + u_char version; + u_char flags; + u_short settlingtime; + u_char res1; + u_char numpst; +} __packed; + +struct pst_header { + u_int32_t cpuid; + u_char fsb; + u_char maxfid; + u_char startvid; + u_char numpstates; +} __packed; + +static u_int fsb; +static u_int sgtc; + +static int +decode_pst(char *p, int npstates) +{ + int i; + int freq, fid, vid; + + for (i = 0; i < npstates; ++i) { + fid = *p++; + vid = *p++; + freq = 100 * fid_to_mult[fid] * fsb; + + printf(" %2d %8dkHz FID %02x (%2d.%01d) VID %02x (%4dmV)\n", + i, + freq, + fid, fid_to_mult[fid]/10, fid_to_mult[fid]%10, + vid, vid_to_voltage[vid]); + } + + return 0; +} + +static +void decode_psb(char *p, int numpst) +{ + int i; + struct psb_header *psb; + struct pst_header *pst; + + psb = (struct psb_header*) p; + + if (psb->version != 0x12) + return; + + printf("PSB version: %hhx flags: %hhx settling time %hhuus res1 %hhx num pst %hhu\n", + psb->version, + psb->flags, + psb->settlingtime, + psb->res1, + psb->numpst); + sgtc = psb->settlingtime * 100; + + if (sgtc < 10000) + sgtc = 10000; + + p = ((char *) psb) + sizeof(struct psb_header); + + if (numpst < 0) + numpst = psb->numpst; + else + printf("Overriding number of pst :%d\n", numpst); + + for (i = 0; i < numpst; i++) { + pst = (struct pst_header*) p; + + if (relevant != 0) { + if (relevant!= pst->cpuid) + goto next_one; + } + + printf(" PST %d cpuid %.3x fsb %hhu mfid %hhx svid %hhx numberstates %hhu\n", + i+1, + pst->cpuid, + pst->fsb, + pst->maxfid, + pst->startvid, + pst->numpstates); + + fsb = pst->fsb; + decode_pst(p + sizeof(struct pst_header), pst->numpstates); + +next_one: + p += sizeof(struct pst_header) + 2*pst->numpstates; + } + +} + +static struct option info_opts[] = { + {.name = "numpst", .has_arg=no_argument, .flag=NULL, .val='n'}, +}; + +void print_help(void) +{ + printf ("Usage: dump_psb [options]\n"); + printf ("Options:\n"); + printf (" -n, --numpst Set number of PST tables to scan\n"); + printf (" -r, --relevant Only display PSTs relevant to cpuid N\n"); +} + +int +main(int argc, char *argv[]) +{ + int fd; + int numpst=-1; + int ret=0, cont=1; + char *mem = NULL; + char *p; + + do { + ret = getopt_long(argc, argv, "hr:n:", info_opts, NULL); + switch (ret){ + case '?': + case 'h': + print_help(); + cont = 0; + break; + case 'r': + relevant = strtol(optarg, NULL, 16); + break; + case 'n': + numpst = strtol(optarg, NULL, 10); + break; + case -1: + cont = 0; + break; + } + + } while(cont); + + fd = open("/dev/mem", O_RDONLY); + if (fd < 0) { + printf ("Couldn't open /dev/mem. Are you root?\n"); + exit(1); + } + + mem = mmap(mem, 0x100000 - 0xc0000, PROT_READ, MAP_SHARED, fd, 0xc0000); + close(fd); + + for (p = mem; p - mem < LEN; p+=16) { + if (memcmp(p, "AMDK7PNOW!", 10) == 0) { + decode_psb(p, numpst); + break; + } + } + + munmap(mem, LEN); + return 0; +} |