mirror of
https://github.com/freebsd/freebsd-src
synced 2024-10-18 14:23:55 +00:00
Merge from the following changes.
sys/boot/i386/libi386/biosmem.c Rev 1.4 sys/boot/i386/libi386/time.c Rev 1.3 sys/boot/i386/loader/main.c Rev 1.16
This commit is contained in:
Yoshihiro Takahashi
parent
73bf949c34
commit
7c1df76bc2
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=55342
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@ -1,62 +1,113 @@
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/*
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* mjs copyright
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/*-
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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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* $FreeBSD$
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*/
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/*
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* Obtain memory configuration information from the BIOS
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*
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* Note that we don't try too hard here; knowing the size of
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* base memory and extended memory out to 16 or 64M is enough for
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* the requirements of the bootstrap.
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*
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* We also maintain a pointer to the top of physical memory
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* once called to allow rangechecking of load/copy requests.
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*/
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#include <stand.h>
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#include "btxv86.h"
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vm_offset_t memtop;
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u_int32_t bios_basemem, bios_extmem;
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/*
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* Return base memory size in kB.
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*/
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int
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getbasemem(void)
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#ifndef PC98
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#define SMAPSIG 0x534D4150
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struct smap {
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u_int64_t base;
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u_int64_t length;
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u_int32_t type;
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} __attribute__ ((packed));
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static struct smap smap;
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#endif
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void
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bios_getmem(void)
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{
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#ifdef PC98
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return ((*(u_char *)PTOV(0xA1501)&0x07)+1)*128;
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bios_basemem = ((*(u_char *)PTOV(0xA1501) & 0x07) + 1) * 128 * 1024;
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bios_extmem = *(u_char *)PTOV(0xA1401) * 128 * 1024 +
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*(u_int16_t *)PTOV(0xA1594) * 1024 * 1024;
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#else
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v86.ctl = 0;
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v86.addr = 0x12; /* int 0x12 */
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v86int();
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/* Parse system memory map */
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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; /* int 0x15 function 0xe820*/
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v86.eax = 0xe820;
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v86.ecx = sizeof(struct smap);
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v86.edx = SMAPSIG;
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v86.es = VTOPSEG(&smap);
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v86.edi = VTOPOFF(&smap);
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v86int();
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if ((v86.efl & 1) || (v86.eax != SMAPSIG))
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break;
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/* look for a low-memory segment that's large enough */
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if ((smap.type == 1) && (smap.base == 0) && (smap.length >= (512 * 1024)))
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bios_basemem = smap.length;
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/* look for the first segment in 'extended' memory */
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if ((smap.type == 1) && (smap.base == 0x100000)) {
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bios_extmem = smap.length;
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}
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} while (v86.ebx != 0);
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return(v86.eax & 0xffff);
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#endif
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}
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/* Fall back to the old compatibility function for base memory */
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if (bios_basemem == 0) {
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v86.ctl = 0;
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v86.addr = 0x12; /* int 0x12 */
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v86int();
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bios_basemem = (v86.eax & 0xffff) * 1024;
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}
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/*
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* Return extended memory size in kB
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*/
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int
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getextmem(void)
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{
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int extkb;
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#ifdef PC98
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extkb = *(u_char *)PTOV(0xA1401)*128 + *(unsigned short *)PTOV(0xA1594)*1024;
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#else
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v86.ctl = 0;
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v86.addr = 0x15; /* int 0x15 function 0x88*/
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v86.eax = 0x8800;
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v86int();
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extkb = v86.eax & 0xffff;
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/* Fall back through several compatibility functions for extended memory */
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if (bios_extmem == 0) {
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v86.ctl = V86_FLAGS;
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v86.addr = 0x15; /* int 0x15 function 0xe801*/
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v86.eax = 0xe801;
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v86int();
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if (!(v86.efl & 1)) {
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bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024;
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}
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}
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if (bios_extmem == 0) {
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v86.ctl = 0;
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v86.addr = 0x15; /* int 0x15 function 0x88*/
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v86.eax = 0x8800;
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v86int();
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bios_extmem = (v86.eax & 0xffff) * 1024;
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}
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#endif
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/* Set memtop to actual top or 16M, whicheve is less */
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memtop = min((0x100000 + (extkb * 1024)), (16 * 1024 * 1024));
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return(extkb);
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}
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/* Set memtop to actual top of memory */
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memtop = 0x100000 + bios_extmem;
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}
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@ -1,5 +1,27 @@
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/*
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* mjs copyright
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/*-
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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:
|
||||
* 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
|
||||
* 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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* $FreeBSD$
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*/
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@ -80,10 +80,9 @@ main(void)
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/*
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* Initialise the heap as early as possible. Once this is done, malloc() is usable.
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*
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* XXX better to locate end of memory and use that
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*/
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setheap((void *)end, (void *)(end + (384 * 1024)));
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bios_getmem();
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setheap((void *)end, (void *)bios_basemem);
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/*
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* XXX Chicken-and-egg problem; we want to have console output early, but some
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@ -108,9 +107,10 @@ main(void)
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for (i = 0; devsw[i] != NULL; i++)
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if (devsw[i]->dv_init != NULL)
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(devsw[i]->dv_init)();
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printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024);
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printf("\n");
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printf("%s, Revision %s %d/%dkB\n", bootprog_name, bootprog_rev, getbasemem(), getextmem());
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printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
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printf("(%s, %s)\n", bootprog_maker, bootprog_date);
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extract_currdev(); /* set $currdev and $loaddev */
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