353 lines
9.1 KiB
C
353 lines
9.1 KiB
C
/* $OpenBSD: memconfig.c,v 1.19 2019/06/28 13:32:48 deraadt Exp $ */
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/*-
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* Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: /home/ncvs/src/usr.sbin/memcontrol/memcontrol.c,v 1.8 2002/09/15 15:07:55 dwmalone Exp $
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/memrange.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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struct {
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const char *name;
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int val;
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int kind;
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#define MDF_SETTABLE (1<<0)
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} attrnames[] = {
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{"uncacheable", MDF_UNCACHEABLE, MDF_SETTABLE},
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{"write-combine", MDF_WRITECOMBINE, MDF_SETTABLE},
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{"write-through", MDF_WRITETHROUGH, MDF_SETTABLE},
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{"write-back", MDF_WRITEBACK, MDF_SETTABLE},
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{"write-protect", MDF_WRITEPROTECT, MDF_SETTABLE},
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{"force", MDF_FORCE, MDF_SETTABLE},
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{"unknown", MDF_UNKNOWN, 0},
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{"fixed-base", MDF_FIXBASE, 0},
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{"fixed-length", MDF_FIXLEN, 0},
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{"set-by-firmware", MDF_FIRMWARE, 0},
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{"active", MDF_ACTIVE, MDF_SETTABLE},
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{"fix-active", MDF_FIXACTIVE, 0},
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{"bogus", MDF_BOGUS, 0},
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{NULL, 0, 0}
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};
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static void listfunc(int, int, char *[]);
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static void setfunc(int, int, char *[]);
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static void clearfunc(int, int, char *[]);
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static void helpfunc(int, int, char *[]);
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static void help(const char *);
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static struct mem_range_desc *mrgetall(int, int *);
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struct
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{
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const char *cmd;
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const char *desc;
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void (*func)(int, int, char *[]);
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} functions[] = {
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{"list",
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"List current memory range attributes\n"
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" list [-a]\n"
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" -a list all range slots, even those that are inactive",
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listfunc},
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{"set",
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"Set memory range attributes\n"
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" set -b <base> -l <length> -o <owner> <attribute>\n"
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" <base> memory range base address\n"
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" <length> length of memory range in bytes, power of 2\n"
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" <owner> text identifier for this setting (7 char max)\n"
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" <attribute> attribute(s) to be applied to this range:\n"
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" uncacheable\n"
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" write-combine\n"
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" write-through\n"
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" write-back\n"
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" write-protect",
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setfunc},
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{"clear",
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"Clear memory range attributes\n"
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" clear -o <owner>\n"
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" <owner> all ranges with this owner will be cleared\n"
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" clear -b <base> -l <length>\n"
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" <base> memory range base address\n"
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" <length> length of memory range in bytes, power of 2\n"
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" Base and length must exactly match an existing range",
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clearfunc},
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{NULL, NULL, helpfunc}
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};
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int
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main(int argc, char *argv[])
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{
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int i, memfd = -1;
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if (argc < 2) {
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help(NULL);
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} else {
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for (i = 0; functions[i].cmd != NULL; i++)
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if (!strcmp(argv[1], functions[i].cmd))
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break;
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if ((functions[i].func != helpfunc) &&
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(memfd = open("/dev/mem", O_RDONLY)) == -1)
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err(1, "can't open /dev/mem");
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functions[i].func(memfd, argc - 1, argv + 1);
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close(memfd);
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}
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return(0);
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}
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static struct mem_range_desc *
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mrgetall(int memfd, int *nmr)
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{
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struct mem_range_desc *mrd;
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struct mem_range_op mro;
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mro.mo_arg[0] = 0;
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if (ioctl(memfd, MEMRANGE_GET, &mro) == -1)
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err(1, "can't size range descriptor array");
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*nmr = mro.mo_arg[0];
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mrd = calloc(*nmr, sizeof(struct mem_range_desc));
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if (mrd == NULL)
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errx(1, "can't allocate %zu bytes for %d range descriptors",
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*nmr * sizeof(struct mem_range_desc), *nmr);
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mro.mo_arg[0] = *nmr;
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mro.mo_desc = mrd;
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if (ioctl(memfd, MEMRANGE_GET, &mro) == -1)
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err(1, "can't fetch range descriptor array");
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return(mrd);
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}
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static void
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listfunc(int memfd, int argc, char *argv[])
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{
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int nd, i, j, k, ch, showall = 0;
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struct mem_range_desc *mrd;
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char *owner;
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owner = NULL;
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while ((ch = getopt(argc, argv, "ao:")) != -1)
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switch(ch) {
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case 'a':
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showall = 1;
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break;
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case 'o':
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if (!(owner = strdup(optarg)))
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errx(1, "out of memory");
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break;
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default:
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help("list");
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}
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mrd = mrgetall(memfd, &nd);
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for (i = 0; i < nd; i++) {
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if (!showall && !(mrd[i].mr_flags & MDF_ACTIVE))
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continue;
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if (owner && strcmp(mrd[i].mr_owner, owner))
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continue;
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printf("%llx/%llx %.8s ", mrd[i].mr_base, mrd[i].mr_len,
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mrd[i].mr_owner[0] ? mrd[i].mr_owner : "-");
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for (j = 0; j < 32; j++) {
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if ( ((1<<j) & mrd[i].mr_flags) == 0)
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continue;
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for (k = 0; attrnames[k].name != NULL; k++)
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if (((1<<j) & mrd[i].mr_flags) & attrnames[k].val) {
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printf("%s ", attrnames[k].name);
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break;
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}
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if (attrnames[k].name == NULL)
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printf("0x%x", (1<<j) & mrd[i].mr_flags);
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}
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printf("\n");
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}
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free(mrd);
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free(owner);
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}
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static void
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setfunc(int memfd, int argc, char *argv[])
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{
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struct mem_range_desc mrd;
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struct mem_range_op mro;
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int i, ch;
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char *ep;
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mrd.mr_base = 0;
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mrd.mr_len = 0;
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mrd.mr_flags = 0;
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strlcpy(mrd.mr_owner, "user", sizeof mrd.mr_owner);
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while ((ch = getopt(argc, argv, "b:l:o:")) != -1)
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switch(ch) {
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case 'b':
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mrd.mr_base = strtoull(optarg, &ep, 0);
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if ((ep == optarg) || (*ep != 0))
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help("set");
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break;
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case 'l':
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mrd.mr_len = strtoull(optarg, &ep, 0);
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if ((ep == optarg) || (*ep != 0))
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help("set");
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break;
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case 'o':
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if (*optarg == 0 ||
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strlen(optarg) > sizeof(mrd.mr_owner)-1)
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help("set");
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strlcpy(mrd.mr_owner, optarg, sizeof mrd.mr_owner);
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break;
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default:
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help("set");
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}
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if (mrd.mr_len == 0)
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help("set");
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argc -= optind;
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argv += optind;
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while(argc--) {
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for (i = 0; attrnames[i].name != NULL; i++) {
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if (!strcmp(attrnames[i].name, argv[0])) {
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if (!(attrnames[i].kind & MDF_SETTABLE))
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help("flags");
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mrd.mr_flags |= attrnames[i].val;
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break;
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}
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}
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if (attrnames[i].name == NULL)
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help("flags");
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argv++;
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}
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mro.mo_desc = &mrd;
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mro.mo_arg[0] = 0;
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if (ioctl(memfd, MEMRANGE_SET, &mro) == -1)
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err(1, "can't set range");
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}
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static void
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clearfunc(int memfd, int argc, char *argv[])
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{
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struct mem_range_desc mrd, *mrdp;
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struct mem_range_op mro;
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int i, nd, ch, got_base = 0;
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char *ep, *owner;
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mrd.mr_base = 0;
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mrd.mr_len = 0;
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owner = NULL;
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while ((ch = getopt(argc, argv, "b:l:o:")) != -1)
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switch(ch) {
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case 'b':
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mrd.mr_base = strtoull(optarg, &ep, 0);
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if ((ep == optarg) || (*ep != 0))
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help("clear");
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else
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got_base = 1;
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break;
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case 'l':
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mrd.mr_len = strtoull(optarg, &ep, 0);
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if ((ep == optarg) || (*ep != 0))
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help("clear");
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break;
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case 'o':
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if ((*optarg == 0) || (strlen(optarg) > 7))
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help("clear");
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if (!(owner = strdup(optarg)))
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errx(1, "out of memory");
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break;
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default:
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help("clear");
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}
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if (owner != NULL) {
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/* clear-by-owner */
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if (got_base || mrd.mr_len != 0)
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help("clear");
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mrdp = mrgetall(memfd, &nd);
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mro.mo_arg[0] = MEMRANGE_SET_REMOVE;
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for (i = 0; i < nd; i++) {
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if (!strcmp(owner, mrdp[i].mr_owner) &&
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(mrdp[i].mr_flags & MDF_ACTIVE) &&
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!(mrdp[i].mr_flags & MDF_FIXACTIVE)) {
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mro.mo_desc = mrdp + i;
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if (ioctl(memfd, MEMRANGE_SET, &mro) == -1)
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warn("couldn't clear range owned by '%s'",
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owner);
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}
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}
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} else if (got_base && mrd.mr_len != 0) {
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/* clear-by-base/len */
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mro.mo_arg[0] = MEMRANGE_SET_REMOVE;
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mro.mo_desc = &mrd;
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if (ioctl(memfd, MEMRANGE_SET, &mro) == -1)
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err(1, "couldn't clear range");
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} else {
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help("clear");
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}
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}
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static void
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helpfunc(int memfd, int argc, char *argv[])
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{
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help(argv[1]);
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}
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static void
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help(const char *what)
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{
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int i;
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if (what != NULL) {
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/* find a function that matches */
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for (i = 0; functions[i].cmd != NULL; i++)
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if (!strcmp(what, functions[i].cmd)) {
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fprintf(stderr, "%s\n", functions[i].desc);
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return;
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}
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fprintf(stderr, "Unknown command '%s'\n", what);
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}
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/* print general help */
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fprintf(stderr, "Valid commands are :\n");
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for (i = 0; functions[i].cmd != NULL; i++)
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fprintf(stderr, " %s\n", functions[i].cmd);
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fprintf(stderr, "Use help <command> for command-specific help\n");
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}
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