160 lines
4.3 KiB
C
160 lines
4.3 KiB
C
/*-
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* Copyright (c) 1998 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Obtain memory configuration information from the BIOS
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*/
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#include <stand.h>
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#include <sys/param.h>
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#include <sys/linker.h>
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#include <sys/queue.h>
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#include <sys/stddef.h>
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#include <machine/metadata.h>
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#include <machine/pc/bios.h>
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#include "bootstrap.h"
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#include "libi386.h"
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#include "btxv86.h"
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struct smap_buf {
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struct bios_smap smap;
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uint32_t xattr; /* Extended attribute from ACPI 3.0 */
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STAILQ_ENTRY(smap_buf) bufs;
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};
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#define SMAP_BUFSIZE offsetof(struct smap_buf, bufs)
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static struct bios_smap *smapbase;
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static uint32_t *smapattr;
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static u_int smaplen;
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void
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bios_getsmap(void)
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{
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struct smap_buf buf;
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STAILQ_HEAD(smap_head, smap_buf) head =
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STAILQ_HEAD_INITIALIZER(head);
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struct smap_buf *cur, *next;
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u_int n, x;
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STAILQ_INIT(&head);
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n = 0;
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x = 0;
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v86.ebx = 0;
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do {
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v86.ctl = V86_FLAGS;
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v86.addr = 0x15;
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v86.eax = 0xe820; /* int 0x15 function 0xe820 */
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v86.ecx = SMAP_BUFSIZE;
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v86.edx = SMAP_SIG;
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v86.es = VTOPSEG(&buf);
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v86.edi = VTOPOFF(&buf);
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v86int();
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if (V86_CY(v86.efl) || v86.eax != SMAP_SIG ||
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v86.ecx < sizeof(buf.smap) || v86.ecx > SMAP_BUFSIZE)
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break;
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next = malloc(sizeof(*next));
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if (next == NULL)
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break;
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next->smap = buf.smap;
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if (v86.ecx == SMAP_BUFSIZE) {
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next->xattr = buf.xattr;
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x++;
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}
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STAILQ_INSERT_TAIL(&head, next, bufs);
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n++;
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} while (v86.ebx != 0);
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smaplen = n;
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if (smaplen > 0) {
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smapbase = malloc(smaplen * sizeof(*smapbase));
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if (smapbase != NULL) {
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n = 0;
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STAILQ_FOREACH(cur, &head, bufs)
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smapbase[n++] = cur->smap;
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}
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if (smaplen == x) {
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smapattr = malloc(smaplen * sizeof(*smapattr));
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if (smapattr != NULL) {
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n = 0;
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STAILQ_FOREACH(cur, &head, bufs)
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smapattr[n++] = cur->xattr &
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SMAP_XATTR_MASK;
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}
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} else
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smapattr = NULL;
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cur = STAILQ_FIRST(&head);
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while (cur != NULL) {
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next = STAILQ_NEXT(cur, bufs);
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free(cur);
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cur = next;
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}
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}
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}
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void
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bios_addsmapdata(struct preloaded_file *kfp)
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{
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size_t size;
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if (smapbase == NULL || smaplen == 0)
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return;
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size = smaplen * sizeof(*smapbase);
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file_addmetadata(kfp, MODINFOMD_SMAP, size, smapbase);
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if (smapattr != NULL) {
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size = smaplen * sizeof(*smapattr);
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file_addmetadata(kfp, MODINFOMD_SMAP_XATTR, size, smapattr);
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}
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}
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COMMAND_SET(smap, "smap", "show BIOS SMAP", command_smap);
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static int
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command_smap(int argc, char *argv[])
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{
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u_int i;
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if (smapbase == NULL || smaplen == 0)
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return (CMD_ERROR);
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if (smapattr != NULL)
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for (i = 0; i < smaplen; i++)
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printf("SMAP type=%02x base=%016llx len=%016llx attr=%02x\n",
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(unsigned int)smapbase[i].type,
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(unsigned long long)smapbase[i].base,
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(unsigned long long)smapbase[i].length,
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(unsigned int)smapattr[i]);
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else
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for (i = 0; i < smaplen; i++)
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printf("SMAP type=%02x base=%016llx len=%016llx\n",
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(unsigned int)smapbase[i].type,
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(unsigned long long)smapbase[i].base,
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(unsigned long long)smapbase[i].length);
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return (CMD_OK);
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}
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