1ca987d46SWarner Losh /*-
2ca987d46SWarner Losh * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3ca987d46SWarner Losh * All rights reserved.
4ca987d46SWarner Losh *
5ca987d46SWarner Losh * Redistribution and use in source and binary forms, with or without
6ca987d46SWarner Losh * modification, are permitted provided that the following conditions
7ca987d46SWarner Losh * are met:
8ca987d46SWarner Losh * 1. Redistributions of source code must retain the above copyright
9ca987d46SWarner Losh * notice, this list of conditions and the following disclaimer.
10ca987d46SWarner Losh * 2. Redistributions in binary form must reproduce the above copyright
11ca987d46SWarner Losh * notice, this list of conditions and the following disclaimer in the
12ca987d46SWarner Losh * documentation and/or other materials provided with the distribution.
13ca987d46SWarner Losh *
14ca987d46SWarner Losh * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15ca987d46SWarner Losh * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16ca987d46SWarner Losh * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17ca987d46SWarner Losh * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18ca987d46SWarner Losh * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19ca987d46SWarner Losh * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20ca987d46SWarner Losh * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21ca987d46SWarner Losh * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22ca987d46SWarner Losh * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23ca987d46SWarner Losh * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24ca987d46SWarner Losh * SUCH DAMAGE.
25ca987d46SWarner Losh */
26ca987d46SWarner Losh
27ca987d46SWarner Losh #include <stand.h>
28ca987d46SWarner Losh #include <sys/param.h>
29ca987d46SWarner Losh #include <sys/reboot.h>
30ca987d46SWarner Losh #include <sys/linker.h>
31ca987d46SWarner Losh #include <i386/include/bootinfo.h>
32ca987d46SWarner Losh
33ca987d46SWarner Losh #include "bootstrap.h"
34bca9c87bSWarner Losh #include "modinfo.h"
35ca987d46SWarner Losh #include "libuserboot.h"
36ca987d46SWarner Losh
37c1418270SIan Lepore #ifdef LOADER_GELI_SUPPORT
38c1418270SIan Lepore #include "geliboot.h"
39c1418270SIan Lepore #endif
40c1418270SIan Lepore
41ca987d46SWarner Losh static struct bootinfo bi;
42ca987d46SWarner Losh
43ca987d46SWarner Losh /*
44ca987d46SWarner Losh * Load the information expected by an i386 kernel.
45ca987d46SWarner Losh *
46ca987d46SWarner Losh * - The 'boothowto' argument is constructed
47ca987d46SWarner Losh * - The 'bootdev' argument is constructed
48ca987d46SWarner Losh * - The 'bootinfo' struct is constructed, and copied into the kernel space.
49ca987d46SWarner Losh * - The kernel environment is copied into kernel space.
50ca987d46SWarner Losh * - Module metadata are formatted and placed in kernel space.
51ca987d46SWarner Losh */
52ca987d46SWarner Losh int
bi_load32(char * args,int * howtop,int * bootdevp,vm_offset_t * bip,vm_offset_t * modulep,vm_offset_t * kernendp)53ca987d46SWarner Losh bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip, vm_offset_t *modulep, vm_offset_t *kernendp)
54ca987d46SWarner Losh {
55ca987d46SWarner Losh struct preloaded_file *xp, *kfp;
561e9b2344SWarner Losh struct devdesc *rootdev;
57ca987d46SWarner Losh struct file_metadata *md;
58ca987d46SWarner Losh vm_offset_t addr;
59ca987d46SWarner Losh vm_offset_t kernend;
60ca987d46SWarner Losh vm_offset_t envp;
61ca987d46SWarner Losh vm_offset_t size;
62ca987d46SWarner Losh vm_offset_t ssym, esym;
63ca987d46SWarner Losh char *rootdevname;
64ca987d46SWarner Losh int bootdevnr, howto;
65ca987d46SWarner Losh char *kernelname;
66ca987d46SWarner Losh const char *kernelpath;
67ca987d46SWarner Losh uint64_t lowmem, highmem;
68ca987d46SWarner Losh
69ca987d46SWarner Losh howto = bi_getboothowto(args);
70ca987d46SWarner Losh
71ca987d46SWarner Losh /*
72ca987d46SWarner Losh * Allow the environment variable 'rootdev' to override the supplied device
73ca987d46SWarner Losh * This should perhaps go to MI code and/or have $rootdev tested/set by
74ca987d46SWarner Losh * MI code before launching the kernel.
75ca987d46SWarner Losh */
76ca987d46SWarner Losh rootdevname = getenv("rootdev");
77ca987d46SWarner Losh userboot_getdev((void **)(&rootdev), rootdevname, NULL);
78ca987d46SWarner Losh if (rootdev == NULL) { /* bad $rootdev/$currdev */
79ca987d46SWarner Losh printf("can't determine root device\n");
80ca987d46SWarner Losh return(EINVAL);
81ca987d46SWarner Losh }
82ca987d46SWarner Losh
83ca987d46SWarner Losh /* Try reading the /etc/fstab file to select the root device */
841e9b2344SWarner Losh getrootmount(devformat(rootdev));
85ca987d46SWarner Losh
86ca987d46SWarner Losh bootdevnr = 0;
87ca987d46SWarner Losh #if 0
88ca987d46SWarner Losh if (bootdevnr == -1) {
891e9b2344SWarner Losh printf("root device %s invalid\n", devformat(rootdev));
90ca987d46SWarner Losh return (EINVAL);
91ca987d46SWarner Losh }
92ca987d46SWarner Losh #endif
93ca987d46SWarner Losh free(rootdev);
94ca987d46SWarner Losh
95ca987d46SWarner Losh /* find the last module in the chain */
96ca987d46SWarner Losh addr = 0;
97ca987d46SWarner Losh for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
98ca987d46SWarner Losh if (addr < (xp->f_addr + xp->f_size))
99ca987d46SWarner Losh addr = xp->f_addr + xp->f_size;
100ca987d46SWarner Losh }
101ca987d46SWarner Losh /* pad to a page boundary */
102ca987d46SWarner Losh addr = roundup(addr, PAGE_SIZE);
103ca987d46SWarner Losh
104ca987d46SWarner Losh /* copy our environment */
105ca987d46SWarner Losh envp = addr;
106fc352701SWarner Losh addr = md_copyenv(addr);
107ca987d46SWarner Losh
108ca987d46SWarner Losh /* pad to a page boundary */
109ca987d46SWarner Losh addr = roundup(addr, PAGE_SIZE);
110ca987d46SWarner Losh
111ca987d46SWarner Losh kfp = file_findfile(NULL, "elf kernel");
112ca987d46SWarner Losh if (kfp == NULL)
113ca987d46SWarner Losh kfp = file_findfile(NULL, "elf32 kernel");
114ca987d46SWarner Losh if (kfp == NULL)
115ca987d46SWarner Losh panic("can't find kernel file");
116ca987d46SWarner Losh kernend = 0; /* fill it in later */
117ca987d46SWarner Losh file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
118ca987d46SWarner Losh file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
119ca987d46SWarner Losh file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
120ca987d46SWarner Losh bios_addsmapdata(kfp);
121c1418270SIan Lepore #ifdef LOADER_GELI_SUPPORT
122c1418270SIan Lepore geli_export_key_metadata(kfp);
123c1418270SIan Lepore #endif
124ca987d46SWarner Losh
125ca987d46SWarner Losh /* Figure out the size and location of the metadata */
126ca987d46SWarner Losh *modulep = addr;
1275d1531d9SWarner Losh size = md_copymodules(0, false);
128ca987d46SWarner Losh kernend = roundup(addr + size, PAGE_SIZE);
129ca987d46SWarner Losh *kernendp = kernend;
130ca987d46SWarner Losh
131ca987d46SWarner Losh /* patch MODINFOMD_KERNEND */
132ca987d46SWarner Losh md = file_findmetadata(kfp, MODINFOMD_KERNEND);
133ca987d46SWarner Losh bcopy(&kernend, md->md_data, sizeof kernend);
134ca987d46SWarner Losh
135ca987d46SWarner Losh /* copy module list and metadata */
1365d1531d9SWarner Losh (void)md_copymodules(addr, false);
137ca987d46SWarner Losh
138ca987d46SWarner Losh ssym = esym = 0;
139ca987d46SWarner Losh md = file_findmetadata(kfp, MODINFOMD_SSYM);
140ca987d46SWarner Losh if (md != NULL)
141ca987d46SWarner Losh ssym = *((vm_offset_t *)&(md->md_data));
142ca987d46SWarner Losh md = file_findmetadata(kfp, MODINFOMD_ESYM);
143ca987d46SWarner Losh if (md != NULL)
144ca987d46SWarner Losh esym = *((vm_offset_t *)&(md->md_data));
145ca987d46SWarner Losh if (ssym == 0 || esym == 0)
146ca987d46SWarner Losh ssym = esym = 0; /* sanity */
147ca987d46SWarner Losh
148ca987d46SWarner Losh /* legacy bootinfo structure */
149ca987d46SWarner Losh kernelname = getenv("kernelname");
150ca987d46SWarner Losh userboot_getdev(NULL, kernelname, &kernelpath);
151ca987d46SWarner Losh bi.bi_version = BOOTINFO_VERSION;
152ca987d46SWarner Losh bi.bi_size = sizeof(bi);
153ca987d46SWarner Losh CALLBACK(getmem, &lowmem, &highmem);
154ca987d46SWarner Losh bi.bi_memsizes_valid = 1;
155ca987d46SWarner Losh bi.bi_basemem = 640;
156ca987d46SWarner Losh bi.bi_extmem = (lowmem - 0x100000) / 1024;
157ca987d46SWarner Losh bi.bi_envp = envp;
158ca987d46SWarner Losh bi.bi_modulep = *modulep;
159ca987d46SWarner Losh bi.bi_kernend = kernend;
160ca987d46SWarner Losh bi.bi_symtab = ssym; /* XXX this is only the primary kernel symtab */
161ca987d46SWarner Losh bi.bi_esymtab = esym;
162ca987d46SWarner Losh
163ca987d46SWarner Losh /*
164ca987d46SWarner Losh * Copy the legacy bootinfo and kernel name to the guest at 0x2000
165ca987d46SWarner Losh */
166ca987d46SWarner Losh bi.bi_kernelname = 0x2000 + sizeof(bi);
167ca987d46SWarner Losh CALLBACK(copyin, &bi, 0x2000, sizeof(bi));
168ca987d46SWarner Losh CALLBACK(copyin, kernelname, 0x2000 + sizeof(bi), strlen(kernelname) + 1);
169ca987d46SWarner Losh
170ca987d46SWarner Losh /* legacy boot arguments */
171ca987d46SWarner Losh *howtop = howto | RB_BOOTINFO;
172ca987d46SWarner Losh *bootdevp = bootdevnr;
173ca987d46SWarner Losh *bip = 0x2000;
174ca987d46SWarner Losh
175ca987d46SWarner Losh return(0);
176ca987d46SWarner Losh }
177