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msrtool: Release Candidate 1

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msrtool can decode MSRs and print the value of every field in human
readable form. It can also be used to save a set of MSRs to a file,
and at a later time compare the saved values with current values in
hardware.

Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3766 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Peter Stuge
2008-11-22 17:13:36 +00:00
committed by Stefan Reinauer
parent d24fe7e80e
commit dad1e3091f
11 changed files with 1719 additions and 0 deletions
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339
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GNU GENERAL PUBLIC LICENSE
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66
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# Makefile for msrtool
#
# This file is part of msrtool.
#
# Copyright (c) 2008 Peter Stuge <peter@stuge.se>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
PROGRAM = msrtool
CC = @CC@
INSTALL = @INSTALL@
PREFIX = @PREFIX@
CFLAGS = @CFLAGS@
LDFLAGS = @LDFLAGS@
TARGETS = geodelx.o cs5536.o
SYSTEMS = linux.o
OBJS = $(PROGRAM).o msrutils.o sys.o $(SYSTEMS) $(TARGETS)
all: $(PROGRAM)
$(PROGRAM): $(OBJS) Makefile.deps
$(CC) -o $@ $(OBJS) $(LDFLAGS)
$(PROGRAM).o: $(PROGRAM).c
$(CC) $(CFLAGS) -DVERSION='"@VERSION@"' -c $< -o $@
install: $(PROGRAM)
$(INSTALL) $(PROGRAM) $(PREFIX)/sbin
mkdir -p $(PREFIX)/share/man/man8
$(INSTALL) $(PROGRAM).8 $(PREFIX)/share/man/man8
distprep: distclean Makefile.deps
clean:
rm -f $(PROGRAM) $(OBJS)
distclean: clean
rm -f Makefile
mrproper: distclean
rm -f Makefile.deps
dep:
rm -f Makefile.deps
$(MAKE) Makefile.deps
Makefile.deps: $(patsubst %.o,%.c,$(OBJS))
$(CC) -MM $^ > $@
.PHONY: all distprep clean distclean mrproper dep
-include Makefile.deps

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Systems
-------
FreeBSD #defines: see svn diff -r 3697:3698 util/
Other ideas
-----------
Move MSR definitions and probe instructions into an external text file?
Handle PCI registers as well?

162
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#!/bin/sh
#
# This file is part of msrtool.
#
# Copyright (c) 2008 Peter Stuge <peter@stuge.se>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# If this is left unset, try to set the version string from the highest
# revision number of the checked out files later.
VERSION=""
REV="$(svnversion -c . 2>/dev/null)"; REV="${REV/*:}"
VERSION="${VERSION:-$REV}"
function findprog() {
local WHAT FROMENV FILE
WHAT="${1}"
shift
FROMENV="${1}"
shift
echo -n "searching for ${WHAT} (${*})..." 1>&2
test -n "${FROMENV}" && {
echo " using environment: ${FROMENV}" 1>&2
echo "${FROMENV}"
exit 0
}
for parm in $(seq 0 $#); do
test -z "${1}" && {
shift
continue
}
FILE="$(which "${1}" 2>/dev/null)"
test $? -eq 0 && {
echo "${1}"
break
}
shift
done
test -z "${1}" && {
echo " not found!" 1>&2
echo 1>&2
echo "This is a fatal error, configure is exiting!" 1>&2
exit 1
}
echo " using ${FILE} in PATH" 1>&2
exit 0
}
function trycompile() {
local WHAT OUT
WHAT="${1}"
shift
echo -n "finding CFLAGS for ${WHAT}... " 1>&2
OUT="${OUT}\n${CC} ${CFLAGS} -o .config.o -c .config.c"
OUT="${OUT}\n$(${CC} ${CFLAGS} -o .config.o -c .config.c 2>&1)"
test $? -eq 0 && {
echo " using: ${CFLAGS}" 1>&2
echo "${CFLAGS}"
exit 0
}
for parm in $(seq 1 $#); do
OUT="${OUT}\n${CC} ${CFLAGS} ${1} -o .config.o -c .config.c 2>&1"
OUT="${OUT}\n$(${CC} ${CFLAGS} ${1} -o .config.o -c .config.c 2>&1)"
test $? -eq 0 && {
echo " using: ${CFLAGS} ${1}" 1>&2
echo "${CFLAGS} ${1}"
exit 0
}
shift
done
echo "failed!" 1>&2
echo 1>&2
echo -n "The following compiler commands were executed:" 1>&2
echo -e "${OUT}\n" 1>&2
echo "This is a fatal error, configure is exiting!" 1>&2
echo 1>&2
echo "You can try to fix this by manually setting CFLAGS in the environment before" 1>&2
echo "running configure. E.g.:" 1>&2
echo "CFLAGS=-I/opt/somedir/include ${0}" 1>&2
echo 1>&2
exit 1
}
function trylink() {
local WHAT OUT
WHAT="${1}"
shift
echo -n "finding LDFLAGS for ${WHAT}... " 1>&2
OUT="${OUT}\n${CC} -o .config .config.o ${LDFLAGS} 2>&1"
OUT="${OUT}\n$(${CC} -o .config .config.o ${LDFLAGS} 2>&1)"
test $? -eq 0 && {
echo " using: ${LDFLAGS}" 1>&2
echo "${LDFLAGS}"
exit 0
}
for parm in $(seq 1 $#); do
OUT="${OUT}\n${CC} -o .config .config.o ${LDFLAGS} ${1} 2>&1"
OUT="${OUT}\n$(${CC} -o .config .config.o ${LDFLAGS} ${1} 2>&1)"
test $? -eq 0 && {
echo " using: ${LDFLAGS} ${1}" 1>&2
echo "${LDFLAGS} ${1}"
exit 0
}
shift
done
echo "failed!" 1>&2
echo 1>&2
echo -n "The following linker commands were executed:" 1>&2
echo -e "${OUT}\n" 1>&2
echo "This is a fatal error, configure is exiting!" 1>&2
echo 1>&2
echo "You can try to fix this by manually setting LDFLAGS in the environment before" 1>&2
echo "running configure. E.g.:" 1>&2
echo "LDFLAGS=-L/opt/somedir/lib ${0}" 1>&2
echo 1>&2
exit 1
}
CC=$(findprog "compiler" "${CC}" gcc cc icc) || exit
INSTALL=$(findprog "install" "${INSTALL}" install ginstall) || exit
test -n "$DEBUG" && myCFLAGS="-O2 -g" || myCFLAGS="-Os"
CFLAGS="${CFLAGS} ${myCFLAGS} -Wall -Werror"
PREFIX="${PREFIX:-/usr/local}"
OS_ARCH=$(uname)
echo
echo "configured using the following settings:"
echo
echo "VERSION=${VERSION}"
echo "CC=${CC}"
echo "CFLAGS=${CFLAGS}"
echo "LDFLAGS=${LDFLAGS}"
echo "INSTALL=${INSTALL}"
echo "PREFIX=${PREFIX}"
echo
echo -n "creating Makefile..."
echo "# This file was automatically generated by configure" > Makefile
sed -e "s#@VERSION@#${VERSION}#g" \
-e "s#@CC@#${CC}#g" \
-e "s#@CFLAGS@#${CFLAGS}#g" \
-e "s#@LDFLAGS@#${LDFLAGS}#g" \
-e "s#@INSTALL@#${INSTALL}#g" \
-e "s#@PREFIX@#/usr/local#g" \
Makefile.in >> Makefile
echo " done"
echo

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util/msrtool/cs5536.c Normal file
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/*
* This file is part of msrtool.
*
* Copyright (c) 2008 Peter Stuge <peter@stuge.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "msrtool.h"
int cs5536_probe(const struct targetdef *target) {
/* TODO: PCI 1022:2090 */
return 0;
}
const struct msrdef cs5536_msrs[] = {
{ MSR_EOT }
};

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util/msrtool/geodelx.c Normal file
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/*
* This file is part of msrtool.
*
* Copyright (c) 2008 Peter Stuge <peter@stuge.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "msrtool.h"
int geodelx_probe(const struct targetdef *target) {
struct cpuid_t *id = cpuid();
return 10 == id->family && 5 == id->model;
}
const struct msrdef geodelx_msrs[] = {
{ 0x4c00000f, MSRTYPE_RDWR, MSR2(0, 0), "GLCP_DELAY_CONTROLS", "GLCP I/O Delay Controls", {
{ 63, 1, "EN", "Enable", PRESENT_DEC, {
{ MSR1(0), "Use default values" },
{ MSR1(1), "Use value in bits [62:0]" },
{ BITVAL_EOT }
}},
{ 62, 1, "B_DQ", "Buffer Control for DQ DQS DQM TLA drive", PRESENT_DEC, {
{ MSR1(1), "Half power" },
{ MSR1(0), "Quarter power" },
{ BITVAL_EOT }
}},
{ 61, 1, "B_CMD", "Buffer Control for RAS CAS CKE CS WE drive", PRESENT_DEC, {
{ MSR1(1), "Half power" },
{ MSR1(0), "Quarter power" },
{ BITVAL_EOT }
}},
{ 60, 1, "B_MA", "Buffer Control for MA BA drive", PRESENT_DEC, {
{ MSR1(0), "Half power" },
{ MSR1(1), "Full power" },
{ BITVAL_EOT }
}},
{ 59, 1, "SDCLK_SET", "SDCLK Setup", PRESENT_DEC, {
{ MSR1(0), "Full SDCLK setup" },
{ MSR1(1), "Half SDCLK setup for control signals" },
{ BITVAL_EOT }
}},
{ 58, 3, "DDR_RLE", "DDR read latch enable position", PRESENT_DEC, NOBITS },
{ 55, 1, "SDCLK_DIS", "SDCLK disable [1,3,5]", PRESENT_DEC, {
{ MSR1(0), "All SDCLK output" },
{ MSR1(1), "SDCLK[0,2,4] output only" },
{ BITVAL_EOT }
}},
{ 54, 3, "TLA1_OA", "TLA hint pin output adjust", PRESENT_DEC, NOBITS },
{ 51, 2, "D_TLA1", "Output delay for TLA1", PRESENT_DEC, NOBITS },
{ 49, 2, "D_TLA0", "Output delay for TLA0", PRESENT_DEC, NOBITS },
{ 47, 2, "D_DQ_E", "Output delay for DQ DQM - even byte lanes", PRESENT_DEC, NOBITS },
{ 45, 2, "D_DQ_O", "Output delay for DQ DQM - odd byte lanes", PRESENT_DEC, NOBITS },
{ 43, 2, RESERVED},
{ 41, 2, "D_SDCLK", "Output delay for SDCLK", PRESENT_DEC, NOBITS },
{ 39, 2, "D_CMD_O", "Output delay for CKE CS RAS CAS WE - odd bits", PRESENT_DEC, NOBITS },
{ 37, 2, "D_CMD_E", "Output delay for CKE CS RAS CAS WE - even bits", PRESENT_DEC, NOBITS },
{ 35, 2, "D_MA_O", "Output delay for BA MA - odd bits", PRESENT_DEC, NOBITS },
{ 33, 2, "D_MA_E", "Output delay for BA MA - even bits", PRESENT_DEC, NOBITS },
{ 31, 2, "D_PCI_O", "Output delay for pci_ad IRQ13 SUSPA# INTA# - odd bits", PRESENT_DEC, NOBITS },
{ 29, 2, "D_PCI_E", "Output delay for pci_ad IRQ13 SUSPA# INTA# - even bits", PRESENT_DEC, NOBITS },
{ 27, 2, "D_DOTCLK", "Output delay for DOTCLK", PRESENT_DEC, NOBITS },
{ 25, 2, "D_DRGB_O", "Output delay for DRGB[31:0] - odd bits", PRESENT_DEC, NOBITS },
{ 23, 2, "D_DRGB_E", "Output delay for DRGB[31:0] HSYNC VSYNC DISPEN VDDEN LDE_MOD - even bits", PRESENT_DEC, NOBITS },
{ 21, 2, "D_PCI_IN", "Input delay for pci_ad CBE# PAR STOP# FRAME# IRDY# TRDY# DEVSEL# REQ# GNT# CIS", PRESENT_DEC, NOBITS },
{ 19, 2, "D_TDBGI", "Input delay for TDBGI", PRESENT_DEC, NOBITS },
{ 17, 2, "D_VIP", "Input delay for VID[15:0] VIP_HSYNC VIP_VSYNC", PRESENT_DEC, NOBITS },
{ 15, 2, "D_VIPCLK", "Input delay for VIPCLK", PRESENT_DEC, NOBITS },
{ 13, 1, "H_SDCLK", "Half SDCLK hold select (for cmd addr)", PRESENT_DEC, {
{ MSR1(1), "Half SDCLK setup for MA and BA" },
{ MSR1(0), "Full SDCLK setup" },
{ BITVAL_EOT }
}},
{ 12, 2, "PLL_FD_DEL", "PLL Feedback Delay", PRESENT_BIN, {
{ MSR1(0), "No feedback delay" },
{ MSR1(1), "~350 ps" },
{ MSR1(2), "~700 ps" },
{ MSR1(3), "~1100 ps (Max feedback delay)" },
{ BITVAL_EOT }
}},
{ 10, 5, RESERVED },
{ 5, 1, "DLL_OV", "DLL Override (to DLL)", PRESENT_DEC, NOBITS },
{ 4, 5, "DLL_OVS/RSDA", "DLL Override Setting or Read Strobe Delay Adjust", PRESENT_DEC, NOBITS },
{ BITS_EOT }
}},
/*
{ 0, MSRTYPE_RDONLY, MSR2(0, 0), "TEMPLATE", "Template MSR", {
{ 63, 64, RESERVED },
{ BITS_EOT }
}},
*/
{ MSR_EOT }
};

88
util/msrtool/linux.c Normal file
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/*
* This file is part of msrtool.
*
* Copyright (c) 2008 Peter Stuge <peter@stuge.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "msrtool.h"
static int msr_fd[MAX_CORES] = {-1, -1, -1, -1, -1, -1, -1, -1};
int linux_probe(const struct sysdef *system) {
struct stat st;
return 0 == stat("/dev/cpu/0/msr", &st);
}
int linux_open(uint8_t cpu, enum SysModes mode) {
int fmode;
char fn[32];
switch (mode) {
case SYS_RDWR:
fmode = O_RDWR;
break;
case SYS_WRONLY:
fmode = O_WRONLY;
break;
case SYS_RDONLY:
default:
fmode = O_RDONLY;
break;
}
if (cpu >= MAX_CORES) {
fprintf(stderr, "%s: only cores 0-%d are supported. requested=%d\n", __func__, MAX_CORES, cpu);
return 0;
}
if (snprintf(fn, sizeof(fn), "/dev/cpu/%d/msr", cpu) == -1) {
fprintf(stderr, "%s: snprintf: %s\n", __func__, strerror(errno));
return 0;
}
msr_fd[cpu] = open(fn, fmode);
if (-1 == msr_fd[cpu]) {
fprintf(stderr, "open(%s): %s\n", fn, strerror(errno));
return 0;
}
return 1;
}
int linux_close(uint8_t cpu) {
int ret;
if (cpu >= MAX_CORES) {
fprintf(stderr, "%s: only cores 0-%d are supported. requested=%d\n", __func__, MAX_CORES, cpu);
return 0;
}
ret = close(msr_fd[cpu]);
msr_fd[cpu] = 0;
return 0 == ret;
}
int linux_rdmsr(uint8_t cpu, uint32_t addr, struct msr *val) {
if (lseek(msr_fd[cpu], addr, SEEK_SET) == -1) {
SYSERROR(lseek, addr);
return 0;
}
if (read(msr_fd[cpu], val, 8) != 8) {
SYSERROR(read, addr);
return 0;
}
return 1;
}

399
util/msrtool/msrtool.c Normal file
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@@ -0,0 +1,399 @@
/*
* This file is part of msrtool.
*
* Copyright (c) 2008 Peter Stuge <peter@stuge.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "msrtool.h"
#define DEFAULT_CPU 0
static uint8_t cpu = DEFAULT_CPU;
uint8_t targets_found = 0;
const struct targetdef **targets = NULL;
const struct sysdef *sys = NULL;
uint8_t reserved = 0, verbose = 0, quiet = 0;
static struct targetdef alltargets[] = {
{ "geodelx", "AMD Geode(tm) LX", geodelx_probe, geodelx_msrs },
{ "cs5536", "AMD Geode(tm) CS5536", cs5536_probe, cs5536_msrs },
{ TARGET_EOT }
};
static struct sysdef allsystems[] = {
{ "linux", "Linux with /dev/cpu/*/msr", linux_probe, linux_open, linux_close, linux_rdmsr },
{ SYSTEM_EOT }
};
static void syntax(char *argv[]) {
printf("syntax: %s [-hvqrkl] [-c cpu] [-m system] [-t target ...]\n", argv[0]);
printf("\t [-i addr=hi[:]lo] | [-s file] | [-d [:]file] | addr...\n");
printf(" -h\t show this help text\n");
printf(" -v\t be verbose\n");
printf(" -q\t be quiet (overrides -v)\n");
printf(" -r\t include [Reserved] values\n");
printf(" -k\t list all known systems and targets\n");
printf(" -l\t list MSRs and bit fields for current target(s) (-kl for ALL targets!)\n");
printf(" -c\t access MSRs on the specified CPU, default=%d\n", DEFAULT_CPU);
printf(" -m\t force a system, e.g: -m linux\n");
printf(" -t\t force a target, can be used multiple times, e.g: -t geodelx -t cs5536\n");
printf(" -i\t immediate mode\n");
printf("\t decode hex addr=hi:lo for the target without reading hw value\n");
printf("\t e.g: -i 4c00000f=f2f100ff56960004\n");
printf(" -s\t stream mode\n");
printf("\t read one MSR address per line and append current hw value to the line\n");
printf("\t use the filename - for stdin/stdout\n");
printf("\t using -l -s ignores input and will output all MSRs with values\n");
printf(" -d\t diff mode\n");
printf("\t read one address and value per line and compare with current hw value,\n");
printf("\t printing differences to stdout. use the filename - to read from stdin\n");
printf("\t use :file or :- to reverse diff, normally hw values are considered new\n");
printf(" addr.. direct mode, read and decode values for the given MSR address(es)\n");
}
static void *add_target(const struct targetdef *t) {
void *tmp;
tmp = realloc(targets, (targets_found + 2) * sizeof(struct targetdef *));
if (NULL == tmp) {
perror("realloc");
return tmp;
}
targets = tmp;
targets[targets_found++] = t;
targets[targets_found] = NULL;
return targets;
}
int do_stream(const char *streamfn, uint8_t ignoreinput) {
char tmpfn[20], line[256];
uint8_t tn;
size_t start, len;
int ret = 1;
int fdout = -1;
FILE *fin = NULL, *fout = NULL;
uint32_t addr, linenum;
struct msr m = MSR1(0);
if (0 == strcmp(streamfn, "-")) {
fin = stdin;
fout = stdout;
} else {
if (!ignoreinput) {
if (NULL == (fin = fopen(streamfn, "r"))) {
perror("fopen()");
return 1;
}
if (snprintf(tmpfn, sizeof(tmpfn), "msrtoolXXXXXX") >= sizeof(tmpfn)) {
perror("snprintf");
return 1;
}
if (-1 == (fdout = mkstemp(tmpfn))) {
perror("mkstemp");
return 1;
}
if (NULL == (fout = fdopen(fdout, "w"))) {
perror("fdopen");
return 1;
}
} else {
if (NULL == (fout = fopen(streamfn, "w"))) {
perror("fopen");
return 1;
}
}
}
if (!sys->open(cpu, SYS_RDONLY))
goto done;
if (ignoreinput) {
for (tn = 0; tn < targets_found; tn++)
if (dumpmsrdefsvals(fout, targets[tn], cpu)) {
ret = 1;
break;
}
} else {
for (linenum = 1; NULL != fgets(line, sizeof(line), fin); ++linenum) {
start = (0 == strncmp("0x", line, 2)) ? 2 : 0;
if (1 == sscanf(line + start, "%8x", &addr)) {
if (!sys->rdmsr(cpu, addr, &m))
goto done;
fprintf(fout, "0x%08x 0x%08x%08x\n", addr, m.hi, m.lo);
continue;
}
while (1) {
fprintf(fout, "%s", line);
len = strlen(line);
if (NULL != strchr("\r\n", line[len - 1]))
break;
if (NULL == fgets(line, sizeof(line), fin))
goto read_done;
}
}
read_done:
if (!feof(fin)) {
fprintf(stderr, "%s:%d: fgets: %s\n", streamfn, linenum, strerror(errno));
goto done;
}
}
ret = 0;
done:
sys->close(cpu);
if (strcmp(streamfn, "-")) {
if (ret)
unlink(tmpfn);
else if (!ignoreinput)
rename(tmpfn, streamfn);
}
if (!ignoreinput)
fclose(fin);
fclose(fout);
return ret;
}
int do_diff(const char *difffn) {
char tmpfn[20], line[512];
size_t start, len;
int ret = 1, tmp;
FILE *fin = NULL, *fout = stdout;
uint8_t rev = 0;
uint32_t addr, linenum;
struct msr mf = MSR1(0), mhw = MSR1(0);
if (':' == difffn[0]) {
rev = 1;
++difffn;
}
if (0 == strcmp(difffn, "-"))
fin = stdin;
else if (NULL == (fin = fopen(difffn, "r"))) {
perror("fopen()");
return 1;
}
if (!sys->open(cpu, SYS_RDONLY))
goto done;
for (linenum = 1; NULL != fgets(line, sizeof(line), fin); ++linenum) {
start = (0 == strncmp("0x", line, 2)) ? 2 : 0;
if (sscanf(line + start, "%8x %n%*x", &addr, &tmp) >= 1) {
start += tmp;
for (len = strlen(line) - 1; NULL != strchr("\r\n", line[len]); --len)
line[len] = 0;
if (!str2msr(line + start, &mf)) {
fprintf(stderr, "%s:%d: invalid MSR value '%s'\n", difffn, linenum, line + start);
continue;
}
if (!sys->rdmsr(cpu, addr, &mhw))
goto done;
if (diff_msr(fout, addr, rev ? mhw : mf, rev ? mf : mhw))
fprintf(fout, "\n");
}
}
if (!feof(fin))
fprintf(stderr, "%s:%d: fgets: %s\n", difffn, linenum, strerror(errno));
else
ret = 0;
done:
sys->close(cpu);
if (strcmp(difffn, "-")) {
if (ret)
unlink(tmpfn);
else
rename(tmpfn, difffn);
fclose(fin);
fclose(fout);
}
return ret;
}
int main(int argc, char *argv[]) {
char c;
int ret = 1;
const struct sysdef *s;
const struct targetdef *t;
uint8_t tn, listmsrs = 0, listknown = 0, input = 0;
uint32_t addr = 0;
const char *streamfn = NULL, *difffn = NULL;
struct msr msrval = MSR2(-1, -1);
while ((c = getopt(argc, argv, "hqvrklc:m:t:a:i:s:d:")) != -1)
switch (c) {
case 'h':
syntax(argv);
return 0;
case 'q':
quiet = 1;
break;
case 'v':
++verbose;
break;
case 'r':
reserved = 1;
break;
case 'k':
listknown = 1;
break;
case 'l':
listmsrs = 1;
break;
case 'c':
cpu = atoi(optarg);
break;
case 'm':
for (s = allsystems; !SYSTEM_ISEOT(*s); s++)
if (!strcmp(s->name, optarg)) {
sys = s;
break;
}
break;
case 't':
for (t = alltargets; !TARGET_ISEOT(*t); t++)
if (!strcmp(t->name, optarg)) {
add_target(t);
break;
}
break;
case 'i':
input = 1;
addr = strtoul(optarg, NULL, 16);
optarg = strchr(optarg, '=');
if (NULL == optarg) {
fprintf(stderr, "missing value in -i argument!\n");
break;
}
if (!str2msr(++optarg, &msrval))
fprintf(stderr, "invalid value in -i argument!\n");
break;
case 's':
streamfn = optarg;
break;
case 'd':
difffn = optarg;
break;
default:
break;
}
printf_quiet("msrtool %s\n", VERSION);
if (!sys && !input && !listknown)
for (sys = allsystems; !SYSTEM_ISEOT(*sys); sys++) {
printf_verbose("Probing for system %s: %s\n", sys->name, sys->prettyname);
if (!sys->probe(sys))
continue;
printf_quiet("Detected system %s: %s\n", sys->name, sys->prettyname);
break;
}
if (targets)
for (tn = 0; tn < targets_found; tn++)
printf_quiet("Forced target %s: %s\n", targets[tn]->name, targets[tn]->prettyname);
else
for (t = alltargets; !TARGET_ISEOT(*t); t++) {
printf_verbose("Probing for target %s: %s\n", t->name, t->prettyname);
if (!t->probe(t))
continue;
printf_quiet("Detected target %s: %s\n", t->name, t->prettyname);
add_target(t);
}
printf_quiet("\n");
fflush(stdout);
if (listknown) {
printf("Known systems:\n");
for (s = allsystems; s->name; s++)
printf("%s: %s\n", s->name, s->prettyname);
printf("\nKnown targets:\n");
for (t = alltargets; t->name; t++) {
if (listmsrs && alltargets != t)
printf("\n");
printf("%s: %s\n", t->name, t->prettyname);
if (listmsrs)
dumpmsrdefs(t);
}
printf("\n");
return 0;
}
if (sys && !sys->name) {
fprintf(stderr, "Unable to detect the current operating system!\n");
fprintf(stderr, "Please send a report or patch to coreboot@coreboot.org. Thanks for your help!\n");
fprintf(stderr, "\n");
}
if (!targets_found || !targets) {
fprintf(stderr, "Unable to detect a known target; can not decode any MSRs! (Use -t to force)\n");
fprintf(stderr, "Please send a report or patch to coreboot@coreboot.org. Thanks for your help!\n");
fprintf(stderr, "\n");
return 1;
}
if (input) {
decodemsr(cpu, addr, msrval);
return 0;
}
if (sys && !sys->name)
return 1;
if (listmsrs) {
if (streamfn)
return do_stream(streamfn, 1);
for (tn = 0; tn < targets_found; tn++) {
if (tn)
printf("\n");
dumpmsrdefs(targets[tn]);
}
printf("\n");
return 0;
}
if (streamfn)
return do_stream(streamfn, 0);
if (!sys->open(cpu, SYS_RDONLY))
return 1;
if (difffn) {
ret = do_diff(difffn);
goto done;
}
if (optind == argc) {
syntax(argv);
printf("\nNo mode or address(es) specified!\n");
goto done;
}
for (; optind < argc; optind++) {
addr = strtoul(argv[optind], NULL, 16);
if (!sys->rdmsr(cpu, addr, &msrval))
break;
decodemsr(cpu, addr, msrval);
}
ret = 0;
done:
sys->close(cpu);
return ret;
}

183
util/msrtool/msrtool.h Normal file
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/*
* This file is part of msrtool.
*
* Copyright (c) 2008 Peter Stuge <peter@stuge.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef MSRTOOL_H
#define MSRTOOL_H
#include <stdio.h>
#include <stdint.h>
#define HEXCHARS "0123456789abcdefABCDEF"
enum {
MSRTYPE_RDONLY,
MSRTYPE_RDWR,
MSRTYPE_WRONLY,
MSRTYPE_EOT
} MsrTypes;
enum {
PRESENT_RSVD,
PRESENT_DEC,
PRESENT_BIN,
PRESENT_OCT,
PRESENT_HEX,
PRESENT_HEXDEC
} PresentTypes;
struct msr {
uint32_t hi;
uint32_t lo;
};
struct msrbitvalues {
const struct msr value;
const char *text;
};
struct msrbits {
const uint8_t start;
const uint8_t size;
const char *name;
const char *desc;
const uint8_t present;
const struct msrbitvalues bitval[32];
};
struct msrdef {
const uint32_t addr;
const uint8_t type;
const struct msr resetval;
const char *symbol;
const char *desc;
const struct msrbits bits[65];
};
#define MSR1(lo) { 0, (lo) }
#define MSR2(hi,lo) { (hi), (lo) }
#define BITVAL_EOT .text = NULL
#define BITVAL_ISEOT(bv) (NULL == (bv).text)
#define BITS_EOT .size = 0
#define BITS_ISEOT(b) (0 == (b).size)
#define MSR_EOT .type = MSRTYPE_EOT
#define MSR_ISEOT(m) (MSRTYPE_EOT == (m).type)
#define NOBITS {{ BITVAL_EOT }}
#define RESERVED "RSVD", "Reserved", PRESENT_HEXDEC, NOBITS
#define MAX_CORES 8
struct targetdef {
const char *name;
const char *prettyname;
int (*probe)(const struct targetdef *target);
const struct msrdef *msrs;
};
#define TARGET_EOT .name = NULL
#define TARGET_ISEOT(t) (NULL == (t).name)
enum SysModes {
SYS_RDONLY = 0,
SYS_WRONLY,
SYS_RDWR
};
struct sysdef {
const char *name;
const char *prettyname;
int (*probe)(const struct sysdef *system);
int (*open)(uint8_t cpu, enum SysModes mode);
int (*close)(uint8_t cpu);
int (*rdmsr)(uint8_t cpu, uint32_t addr, struct msr *val);
};
#define SYSTEM_EOT .name = NULL
#define SYSTEM_ISEOT(s) (NULL == (s).name)
struct cpuid_t {
uint8_t family;
uint8_t model;
uint8_t stepping;
uint8_t ext_family;
uint8_t ext_model;
};
extern const struct sysdef *sys;
extern uint8_t targets_found;
extern const struct targetdef **targets;
extern uint8_t reserved, verbose, quiet;
#define printf_quiet(x...) do { if (!quiet) fprintf(stderr,x); } while(0)
#define printf_verbose(x...) do { if (verbose && !quiet) fprintf(stderr,x); } while(0)
#define SYSERROR(call, addr) do { \
const struct msrdef *m = findmsrdef(addr); \
if (m) \
fprintf(stderr, "%s: " #call "(0x%08x) %s: %s\n", __func__, addr, m->symbol, strerror(errno)); \
else \
fprintf(stderr, "%s: " #call "(0x%08x): %s\n", __func__, addr, strerror(errno)); \
} while (0);
/* sys.c */
struct cpuid_t *cpuid(void);
/* msrutils.c */
void hexprint(FILE *f, const struct msr val, const uint8_t bits);
int msr_eq(const struct msr a, const struct msr b);
struct msr msr_shl(const struct msr a, const uint8_t bits);
struct msr msr_shr(const struct msr a, const uint8_t bits);
void msr_and(struct msr *a, const struct msr b);
const struct msrdef *findmsrdef(const uint32_t addr);
void dumpmsrdefs(const struct targetdef *t);
int dumpmsrdefsvals(FILE *f, const struct targetdef *t, const uint8_t cpu);
uint8_t str2msr(char *str, struct msr *msr);
void decodemsr(const uint8_t cpu, const uint32_t addr, const struct msr val);
uint8_t diff_msr(FILE *fout, const uint32_t addr, const struct msr a, const struct msr b);
/** system externs **/
/* linux.c */
extern int linux_probe(const struct sysdef *system);
extern int linux_open(uint8_t cpu, enum SysModes mode);
extern int linux_close(uint8_t cpu);
extern int linux_rdmsr(uint8_t cpu, uint32_t addr, struct msr *val);
/** target externs **/
/* geodelx.c */
extern int geodelx_probe(const struct targetdef *t);
extern const struct msrdef geodelx_msrs[];
/* cs5536.c */
extern int cs5536_probe(const struct targetdef *t);
extern const struct msrdef cs5536_msrs[];
#endif /* MSRTOOL_H */

299
util/msrtool/msrutils.c Normal file
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/*
* This file is part of msrtool.
*
* Copyright (c) 2008 Peter Stuge <peter@stuge.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "msrtool.h"
static void print_bitdef(FILE *f, const struct msrbits *mb, const char *tail) {
uint8_t endbit;
if (!reserved && !strcmp(mb->name, "RSVD"))
return;
if (1 == mb->size)
fprintf(f, "# %5d", mb->start);
else {
endbit = mb->start - mb->size + 1;
fprintf(f, "# %*d:%d", endbit < 10 ? 3 : 2, mb->start, endbit);
}
if (!strcmp(mb->name, "RSVD"))
fprintf(f, " [%s]", mb->desc);
else
fprintf(f, " %s %s", mb->name, mb->desc);
fprintf(f, "%s", tail);
}
static void print_bitval(FILE *f, const struct msrbits *mb, const struct msr val) {
uint8_t i;
struct msr tmp, mask = MSR1(1);
const struct msrbitvalues *mbv = mb->bitval;
while (mbv->text && !msr_eq(mbv->value, val))
mbv++;
switch (mb->present) {
case PRESENT_BIN:
mask = msr_shl(mask, mb->size - 1);
for (i = 0; i < mb->size; i++) {
memcpy(&tmp, &val, sizeof(val));
msr_and(&tmp, mask);
fprintf(f, "%d", (tmp.hi || tmp.lo) ? 1 : 0);
mask = msr_shr(mask, 1);
}
/* TODO */
break;
case PRESENT_DEC:
fprintf(f, "%d", val.lo);
break;
case PRESENT_OCT:
fprintf(f, "0%o", val.lo);
break;
case PRESENT_HEX:
hexprint(f, val, mb->size);
break;
case PRESENT_HEXDEC:
hexprint(f, val, mb->size);
fprintf(f, " %d", val.lo);
break;
}
if (mbv->text)
fprintf(f, ": %s", mbv->text);
fprintf(f, "\n");
}
void hexprint(FILE *f, const struct msr val, const uint8_t bits) {
if (bits <= 4)
fprintf(f, "0x%x", (uint8_t)(val.lo & 0x0f));
else if (bits <= 8)
fprintf(f, "0x%02x", (uint8_t)(val.lo & 0xff));
else if (bits <= 16)
fprintf(f, "0x%04x", (uint16_t)(val.lo & 0xffff));
else if (bits <= 32)
fprintf(f, "0x%08x", val.lo);
else
fprintf(f, "0x%08x%08x", val.hi, val.lo);
}
int msr_eq(const struct msr a, const struct msr b) {
return a.hi == b.hi && a.lo == b.lo;
}
struct msr msr_shl(const struct msr a, const uint8_t bits) {
struct msr ret;
ret.hi = bits < 32 ? a.hi << bits : 0;
ret.lo = bits < 32 ? a.lo << bits : 0;
if (bits < 32)
ret.hi |= bits ? a.lo >> (32 - bits) : 0;
else
ret.hi |= a.lo << (bits - 32);
return ret;
}
struct msr msr_shr(const struct msr a, const uint8_t bits) {
struct msr ret;
ret.hi = bits < 32 ? a.hi >> bits : 0;
ret.lo = bits < 32 ? a.lo >> bits : 0;
if (bits < 32)
ret.lo |= bits ? a.hi << (32 - bits) : 0;
else
ret.lo |= a.hi >> (bits - 32);
return ret;
}
void msr_and(struct msr *a, const struct msr b) {
a->hi &= b.hi;
a->lo &= b.lo;
}
const struct msrdef *findmsrdef(const uint32_t addr) {
uint8_t t;
const struct msrdef *m;
if (!targets)
return NULL;
for (t = 0; t < targets_found; t++)
for (m = targets[t]->msrs; !MSR_ISEOT(*m); m++)
if (addr == m->addr)
return m;
return NULL;
}
void dumpmsrdefs(const struct targetdef *t) {
const struct msrdef *m;
const struct msrbits *mb;
if (!t)
return;
printf("# %s MSRs:\n", t->name);
for (m = t->msrs; !MSR_ISEOT(*m); m++) {
if (t->msrs != m)
printf("\n");
printf("# %s\n", m->symbol);
for (mb = m->bits; mb->size; mb++)
print_bitdef(stdout, mb, "\n");
printf("0x%08x\n", m->addr);
}
}
int dumpmsrdefsvals(FILE *f, const struct targetdef *t, const uint8_t cpu) {
struct msr val = MSR1(0);
const struct msrdef *m;
const struct msrbits *mb;
if (!t)
return 1;
fprintf(f, "# %s MSRs:\n", t->name);
for (m = t->msrs; !MSR_ISEOT(*m); m++) {
if (t->msrs != m)
fprintf(f, "\n");
if (!sys->rdmsr(cpu, m->addr, &val))
return 1;
fprintf(f, "# %s\n", m->symbol);
for (mb = m->bits; mb->size; mb++)
print_bitdef(f, mb, "\n");
fprintf(f, "0x%08x 0x%08x%08x\n", m->addr, val.hi, val.lo);
}
return 0;
}
/**
* Parse a hexadecimal string into an MSR value.
*
* Leading 0x or 0X is optional, the string is always parsed as hexadecimal.
* Any non-hexadecimal character can be used to separate the high 32 bits and
* the low 32 bits. If there is such a separator, high and low values do not
* need to be zero padded. If there is no separator, the last <=8 digits are
* the low 32 bits and any characters before them are the high 32 bits.
* When there is no separator and less than eight digits, the high 32 bits
* are set to 0.
* Parsing fails when there is a separator and it is followed by another
* non-hexadecimal character.
*
* @param str The string to parse. The string must be writable but will be
* restored before return.
* @param msr Pointer to the struct msr where the value will be stored.
* @return 1 on success, 0 on parse failure. msr is unchanged on failure.
*/
uint8_t str2msr(char *str, struct msr *msr) {
char c;
size_t len, lo;
if (0 == strncmp(str, "0x", 2) || 0 == strncmp(str, "0X", 2))
str += 2;
len = strspn(str, HEXCHARS);
if (len <= 8 && 0 == str[len]) {
msr->hi = 0;
lo = 0;
} else if (len <= 8) {
lo = len + strcspn(str + len, HEXCHARS);
if (0 == len && 0 == strspn(str + lo, HEXCHARS))
return 0;
c = str[len];
str[len] = 0;
msr->hi = strtoul(str, NULL, 16);
str[len] = c;
} else {
lo = len - 8;
c = str[lo];
str[lo] = 0;
msr->hi = strtoul(str, NULL, 16);
str[lo] = c;
}
msr->lo = strtoul(str + lo, NULL, 16);
return 1;
}
void decodemsr(const uint8_t cpu, const uint32_t addr, const struct msr val) {
struct msr bitval, mask;
const struct msrdef *m = findmsrdef(addr);
const struct msrbits *mb;
if (m)
printf("# %s ", m->symbol);
printf("0x%08x = 0x%08x%08x\n", addr, val.hi, val.lo);
if (!m) {
fprintf(stderr, "Sorry - no definition exists for this MSR! Please add it and send a signed-off\n");
fprintf(stderr, "patch to coreboot@coreboot.org. Thanks for your help!\n");
return;
}
for (mb = m->bits; mb->size; mb++) {
if (!reserved && 0 == strcmp(mb->name, "RSVD"))
continue;
print_bitdef(stdout, mb, " = ");
mask.hi = mask.lo = 0xffffffff;
mask = msr_shr(mask, 64 - mb->size);
bitval = msr_shr(val, mb->start - mb->size + 1);
msr_and(&bitval, mask);
print_bitval(stdout, mb, bitval);
}
}
/**
* Compare two MSR values and print any differences with field definitions and
* both old and new values decoded.
*
* @param f Output stream.
* @param addr MSR address.
* @param a Left value.
* @param b Right value.
* @return 1 when a and b differ, 0 when they are equal or only reserved bits
* differ and processing of reserved bits was not requested (with -r).
*/
uint8_t diff_msr(FILE *f, const uint32_t addr, const struct msr a, const struct msr b) {
uint8_t ret = 0, first = 1;
struct msr aval, bval, mask;
const struct msrdef *m = findmsrdef(addr);
const struct msrbits *mb;
if (a.hi == b.hi && a.lo == b.lo)
return 0;
if (!m) {
fprintf(stderr, "MSR 0x%08x has no definition! Please add it and send a Signed-off-by patch\n", addr);
fprintf(stderr, "to coreboot@coreboot.org. Thank you for your help!\n");
return 1;
}
for (mb = m->bits; mb->size; mb++) {
if (!reserved && 0 == strcmp(mb->name, "RSVD"))
continue;
mask.hi = mask.lo = 0xffffffff;
mask = msr_shr(mask, 64 - mb->size);
aval = msr_shr(a, mb->start - mb->size + 1);
bval = msr_shr(b, mb->start - mb->size + 1);
msr_and(&aval, mask);
msr_and(&bval, mask);
if (msr_eq(aval, bval))
continue;
if (first) {
fprintf(f, "# %s\n", m->symbol);
fprintf(f, "-0x%08x 0x%08x%08x\n", addr, a.hi, a.lo);
fprintf(f, "+0x%08x 0x%08x%08x\n", addr, b.hi, b.lo);
first = 0;
ret = 1;
}
print_bitdef(f, mb, "\n-");
print_bitval(f, mb, aval);
fprintf(f, "+");
print_bitval(f, mb, bval);
}
return ret;
}

42
util/msrtool/sys.c Normal file
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@@ -0,0 +1,42 @@
/*
* This file is part of msrtool.
*
* Copyright (c) 2008 Peter Stuge <peter@stuge.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "msrtool.h"
static struct cpuid_t id;
struct cpuid_t *cpuid(void) {
uint32_t outeax;
asm ("cpuid" : "=a" (outeax) : "a" (1) : "%ebx", "%ecx", "%edx");
id.stepping = outeax & 0xf;
outeax >>= 4;
id.model = outeax & 0xf;
outeax >>= 4;
id.family = outeax & 0xf;
outeax >>= 8;
id.ext_model = outeax & 0xf;
outeax >>= 4;
id.ext_family = outeax & 0xff;
if (0xf == id.family) {
/* Intel says always do this, AMD says only for family f */
id.model |= (id.ext_model << 4);
id.family += id.ext_family;
}
return &id;
}