diff options
Diffstat (limited to 'stand/i386/libi386/biossmap.c')
| -rw-r--r-- | stand/i386/libi386/biossmap.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/stand/i386/libi386/biossmap.c b/stand/i386/libi386/biossmap.c new file mode 100644 index 0000000..e95ea64 --- /dev/null +++ b/stand/i386/libi386/biossmap.c @@ -0,0 +1,159 @@ +/*- + * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * Obtain memory configuration information from the BIOS + */ +#include <stand.h> +#include <sys/param.h> +#include <sys/linker.h> +#include <sys/queue.h> +#include <sys/stddef.h> +#include <machine/metadata.h> +#include <machine/pc/bios.h> +#include "bootstrap.h" +#include "libi386.h" +#include "btxv86.h" + +struct smap_buf { + struct bios_smap smap; + uint32_t xattr; /* Extended attribute from ACPI 3.0 */ + STAILQ_ENTRY(smap_buf) bufs; +}; + +#define SMAP_BUFSIZE offsetof(struct smap_buf, bufs) + +static struct bios_smap *smapbase; +static uint32_t *smapattr; +static u_int smaplen; + +void +bios_getsmap(void) +{ + struct smap_buf buf; + STAILQ_HEAD(smap_head, smap_buf) head = + STAILQ_HEAD_INITIALIZER(head); + struct smap_buf *cur, *next; + u_int n, x; + + STAILQ_INIT(&head); + n = 0; + x = 0; + v86.ebx = 0; + do { + v86.ctl = V86_FLAGS; + v86.addr = 0x15; + v86.eax = 0xe820; /* int 0x15 function 0xe820 */ + v86.ecx = SMAP_BUFSIZE; + v86.edx = SMAP_SIG; + v86.es = VTOPSEG(&buf); + v86.edi = VTOPOFF(&buf); + v86int(); + if (V86_CY(v86.efl) || v86.eax != SMAP_SIG || + v86.ecx < sizeof(buf.smap) || v86.ecx > SMAP_BUFSIZE) + break; + + next = malloc(sizeof(*next)); + if (next == NULL) + break; + next->smap = buf.smap; + if (v86.ecx == SMAP_BUFSIZE) { + next->xattr = buf.xattr; + x++; + } + STAILQ_INSERT_TAIL(&head, next, bufs); + n++; + } while (v86.ebx != 0); + smaplen = n; + + if (smaplen > 0) { + smapbase = malloc(smaplen * sizeof(*smapbase)); + if (smapbase != NULL) { + n = 0; + STAILQ_FOREACH(cur, &head, bufs) + smapbase[n++] = cur->smap; + } + if (smaplen == x) { + smapattr = malloc(smaplen * sizeof(*smapattr)); + if (smapattr != NULL) { + n = 0; + STAILQ_FOREACH(cur, &head, bufs) + smapattr[n++] = cur->xattr & + SMAP_XATTR_MASK; + } + } else + smapattr = NULL; + cur = STAILQ_FIRST(&head); + while (cur != NULL) { + next = STAILQ_NEXT(cur, bufs); + free(cur); + cur = next; + } + } +} + +void +bios_addsmapdata(struct preloaded_file *kfp) +{ + size_t size; + + if (smapbase == NULL || smaplen == 0) + return; + size = smaplen * sizeof(*smapbase); + file_addmetadata(kfp, MODINFOMD_SMAP, size, smapbase); + if (smapattr != NULL) { + size = smaplen * sizeof(*smapattr); + file_addmetadata(kfp, MODINFOMD_SMAP_XATTR, size, smapattr); + } +} + +COMMAND_SET(smap, "smap", "show BIOS SMAP", command_smap); + +static int +command_smap(int argc, char *argv[]) +{ + u_int i; + + if (smapbase == NULL || smaplen == 0) + return (CMD_ERROR); + if (smapattr != NULL) + for (i = 0; i < smaplen; i++) + printf("SMAP type=%02x base=%016llx len=%016llx attr=%02x\n", + (unsigned int)smapbase[i].type, + (unsigned long long)smapbase[i].base, + (unsigned long long)smapbase[i].length, + (unsigned int)smapattr[i]); + else + for (i = 0; i < smaplen; i++) + printf("SMAP type=%02x base=%016llx len=%016llx\n", + (unsigned int)smapbase[i].type, + (unsigned long long)smapbase[i].base, + (unsigned long long)smapbase[i].length); + return (CMD_OK); +} |
