1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <stand.h>
28#include <sys/param.h>
29#include <sys/reboot.h>
30#include <sys/linker.h>
31#include <machine/bootinfo.h>
32#include <machine/metadata.h>
33#include "bootstrap.h"
34#include "modinfo.h"
35#include "libi386.h"
36#include "btxv86.h"
37
38#ifdef LOADER_GELI_SUPPORT
39#include "geliboot.h"
40#endif
41
42static struct bootinfo  *bi;
43
44/*
45 * Load the information expected by an i386 kernel.
46 *
47 * - The 'boothowto' argument is constructed
48 * - The 'bootdev' argument is constructed
49 * - The 'bootinfo' struct is constructed, and copied into the kernel space.
50 * - The kernel environment is copied into kernel space.
51 * - Module metadata are formatted and placed in kernel space.
52 */
53int
54bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip, vm_offset_t *modulep, vm_offset_t *kernendp)
55{
56    struct preloaded_file	*xp, *kfp;
57    struct i386_devdesc		*rootdev;
58    struct file_metadata	*md;
59    vm_offset_t			addr;
60    vm_offset_t			kernend;
61    vm_offset_t			envp;
62    vm_offset_t			size;
63    vm_offset_t			ssym, esym;
64    char			*rootdevname;
65    int				bootdevnr, i, howto;
66    char			*kernelname;
67    const char			*kernelpath;
68
69    howto = bi_getboothowto(args);
70
71    /*
72     * Allow the environment variable 'rootdev' to override the supplied device
73     * This should perhaps go to MI code and/or have $rootdev tested/set by
74     * MI code before launching the kernel.
75     */
76    rootdevname = getenv("rootdev");
77    i386_getdev((void **)(&rootdev), rootdevname, NULL);
78    if (rootdev == NULL) {		/* bad $rootdev/$currdev */
79	printf("can't determine root device\n");
80	return(EINVAL);
81    }
82
83    /* Try reading the /etc/fstab file to select the root device */
84    getrootmount(devformat(&rootdev->dd));
85
86    /* Do legacy rootdev guessing */
87
88    /* XXX - use a default bootdev of 0.  Is this ok??? */
89    bootdevnr = 0;
90
91    bi = calloc(sizeof(*bi), 1);
92    switch(rootdev->dd.d_dev->dv_type) {
93    case DEVT_CD:
94    case DEVT_DISK:
95	/* pass in the BIOS device number of the current disk */
96	bi->bi_bios_dev = bd_unit2bios(rootdev);
97	bootdevnr = bd_getdev(rootdev);
98	break;
99
100    case DEVT_NET:
101    case DEVT_ZFS:
102	    break;
103
104    default:
105	printf("WARNING - don't know how to boot from device type %d\n",
106	    rootdev->dd.d_dev->dv_type);
107    }
108    if (bootdevnr == -1) {
109	printf("root device %s invalid\n", devformat(&rootdev->dd));
110	return (EINVAL);
111    }
112    free(rootdev);
113
114    /* find the last module in the chain */
115    addr = 0;
116    for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
117	if (addr < (xp->f_addr + xp->f_size))
118	    addr = xp->f_addr + xp->f_size;
119    }
120    /* pad to a page boundary */
121    addr = roundup(addr, PAGE_SIZE);
122
123    addr = build_font_module(addr);
124
125    /* copy our environment */
126    envp = addr;
127    addr = md_copyenv(addr);
128
129    /* pad to a page boundary */
130    addr = roundup(addr, PAGE_SIZE);
131
132    kfp = file_findfile(NULL, "elf kernel");
133    if (kfp == NULL)
134      kfp = file_findfile(NULL, "elf32 kernel");
135    if (kfp == NULL)
136	panic("can't find kernel file");
137    kernend = 0;	/* fill it in later */
138    file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
139    file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
140    file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
141    bios_addsmapdata(kfp);
142#ifdef LOADER_GELI_SUPPORT
143    geli_export_key_metadata(kfp);
144#endif
145    bi_load_vbe_data(kfp);
146
147    /* Figure out the size and location of the metadata */
148    *modulep = addr;
149    size = md_copymodules(0, false);
150    kernend = roundup(addr + size, PAGE_SIZE);
151    *kernendp = kernend;
152
153    /* patch MODINFOMD_KERNEND */
154    md = file_findmetadata(kfp, MODINFOMD_KERNEND);
155    bcopy(&kernend, md->md_data, sizeof kernend);
156
157    /* copy module list and metadata */
158    (void)md_copymodules(addr, false);
159
160    ssym = esym = 0;
161    md = file_findmetadata(kfp, MODINFOMD_SSYM);
162    if (md != NULL)
163	ssym = *((vm_offset_t *)&(md->md_data));
164    md = file_findmetadata(kfp, MODINFOMD_ESYM);
165    if (md != NULL)
166	esym = *((vm_offset_t *)&(md->md_data));
167    if (ssym == 0 || esym == 0)
168	ssym = esym = 0;		/* sanity */
169
170    /* legacy bootinfo structure */
171    kernelname = getenv("kernelname");
172    i386_getdev(NULL, kernelname, &kernelpath);
173    bi->bi_version = BOOTINFO_VERSION;
174    bi->bi_size = sizeof(*bi);
175    bi->bi_memsizes_valid = 1;
176    bi->bi_basemem = bios_basemem / 1024;
177    bi->bi_extmem = bios_extmem / 1024;
178    bi->bi_envp = envp;
179    bi->bi_modulep = *modulep;
180    bi->bi_kernend = kernend;
181    bi->bi_kernelname = VTOP(kernelpath);
182    bi->bi_symtab = ssym;       /* XXX this is only the primary kernel symtab */
183    bi->bi_esymtab = esym;
184
185    /* legacy boot arguments */
186    *howtop = howto | RB_BOOTINFO;
187    *bootdevp = bootdevnr;
188    *bip = VTOP(bi);
189
190    return(0);
191}
192