176b35943SToomas Soome /*
2199767f8SToomas Soome * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3199767f8SToomas Soome * All rights reserved.
4199767f8SToomas Soome *
5199767f8SToomas Soome * Redistribution and use in source and binary forms, with or without
6199767f8SToomas Soome * modification, are permitted provided that the following conditions
7199767f8SToomas Soome * are met:
8199767f8SToomas Soome * 1. Redistributions of source code must retain the above copyright
9199767f8SToomas Soome * notice, this list of conditions and the following disclaimer.
10199767f8SToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
11199767f8SToomas Soome * notice, this list of conditions and the following disclaimer in the
12199767f8SToomas Soome * documentation and/or other materials provided with the distribution.
13199767f8SToomas Soome *
14199767f8SToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15199767f8SToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16199767f8SToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17199767f8SToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18199767f8SToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19199767f8SToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20199767f8SToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21199767f8SToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22199767f8SToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23199767f8SToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24199767f8SToomas Soome * SUCH DAMAGE.
25199767f8SToomas Soome */
26199767f8SToomas Soome
27199767f8SToomas Soome #include <sys/cdefs.h>
28199767f8SToomas Soome
29199767f8SToomas Soome #include <stand.h>
30199767f8SToomas Soome #include <sys/param.h>
31199767f8SToomas Soome #include <sys/reboot.h>
32199767f8SToomas Soome #include <sys/linker.h>
33199767f8SToomas Soome #include <machine/bootinfo.h>
34199767f8SToomas Soome #include "bootstrap.h"
35199767f8SToomas Soome #include "libi386.h"
36199767f8SToomas Soome #include "btxv86.h"
37199767f8SToomas Soome
38199767f8SToomas Soome static struct bootinfo bi;
39199767f8SToomas Soome
40199767f8SToomas Soome /*
41199767f8SToomas Soome * Copy module-related data into the load area, where it can be
42199767f8SToomas Soome * used as a directory for loaded modules.
43199767f8SToomas Soome *
44199767f8SToomas Soome * Module data is presented in a self-describing format. Each datum
45199767f8SToomas Soome * is preceded by a 32-bit identifier and a 32-bit size field.
46199767f8SToomas Soome *
47199767f8SToomas Soome * Currently, the following data are saved:
48199767f8SToomas Soome *
49199767f8SToomas Soome * MOD_NAME (variable) module name (string)
50199767f8SToomas Soome * MOD_TYPE (variable) module type (string)
51199767f8SToomas Soome * MOD_ARGS (variable) module parameters (string)
52199767f8SToomas Soome * MOD_ADDR sizeof(vm_offset_t) module load address
53199767f8SToomas Soome * MOD_SIZE sizeof(size_t) module size
54199767f8SToomas Soome * MOD_METADATA (variable) type-specific metadata
55199767f8SToomas Soome */
56199767f8SToomas Soome #define COPY32(v, a, c) { \
57199767f8SToomas Soome u_int32_t x = (v); \
58199767f8SToomas Soome if (c) \
59199767f8SToomas Soome i386_copyin(&x, a, sizeof(x)); \
60199767f8SToomas Soome a += sizeof(x); \
61199767f8SToomas Soome }
62199767f8SToomas Soome
63199767f8SToomas Soome #define MOD_STR(t, a, s, c) { \
64199767f8SToomas Soome COPY32(t, a, c); \
65199767f8SToomas Soome COPY32(strlen(s) + 1, a, c); \
66199767f8SToomas Soome if (c) \
67199767f8SToomas Soome i386_copyin(s, a, strlen(s) + 1); \
68199767f8SToomas Soome a += roundup(strlen(s) + 1, sizeof(u_long));\
69199767f8SToomas Soome }
70199767f8SToomas Soome
71199767f8SToomas Soome #define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
72199767f8SToomas Soome #define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
73199767f8SToomas Soome #define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
74199767f8SToomas Soome
75199767f8SToomas Soome #define MOD_VAR(t, a, s, c) { \
76199767f8SToomas Soome COPY32(t, a, c); \
77199767f8SToomas Soome COPY32(sizeof(s), a, c); \
78199767f8SToomas Soome if (c) \
79199767f8SToomas Soome i386_copyin(&s, a, sizeof(s)); \
80199767f8SToomas Soome a += roundup(sizeof(s), sizeof(u_long)); \
81199767f8SToomas Soome }
82199767f8SToomas Soome
83199767f8SToomas Soome #define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
84199767f8SToomas Soome #define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
85199767f8SToomas Soome
86199767f8SToomas Soome #define MOD_METADATA(a, mm, c) { \
87199767f8SToomas Soome COPY32(MODINFO_METADATA | mm->md_type, a, c); \
88199767f8SToomas Soome COPY32(mm->md_size, a, c); \
89199767f8SToomas Soome if (c) \
90199767f8SToomas Soome i386_copyin(mm->md_data, a, mm->md_size); \
91199767f8SToomas Soome a += roundup(mm->md_size, sizeof(u_long));\
92199767f8SToomas Soome }
93199767f8SToomas Soome
94199767f8SToomas Soome #define MOD_END(a, c) { \
95199767f8SToomas Soome COPY32(MODINFO_END, a, c); \
96199767f8SToomas Soome COPY32(0, a, c); \
97199767f8SToomas Soome }
98199767f8SToomas Soome
99199767f8SToomas Soome static vm_offset_t
bi_copymodules32(vm_offset_t addr)100199767f8SToomas Soome bi_copymodules32(vm_offset_t addr)
101199767f8SToomas Soome {
102199767f8SToomas Soome struct preloaded_file *fp;
103199767f8SToomas Soome struct file_metadata *md;
104199767f8SToomas Soome int c;
105199767f8SToomas Soome
106199767f8SToomas Soome c = addr != 0;
107199767f8SToomas Soome /* start with the first module on the list, should be the kernel */
108199767f8SToomas Soome for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
109199767f8SToomas Soome
110199767f8SToomas Soome MOD_NAME(addr, fp->f_name, c); /* this field must come first */
111199767f8SToomas Soome MOD_TYPE(addr, fp->f_type, c);
112199767f8SToomas Soome if (fp->f_args)
113199767f8SToomas Soome MOD_ARGS(addr, fp->f_args, c);
114199767f8SToomas Soome MOD_ADDR(addr, fp->f_addr, c);
115199767f8SToomas Soome MOD_SIZE(addr, fp->f_size, c);
116199767f8SToomas Soome for (md = fp->f_metadata; md != NULL; md = md->md_next)
117199767f8SToomas Soome if (!(md->md_type & MODINFOMD_NOCOPY))
118199767f8SToomas Soome MOD_METADATA(addr, md, c);
119199767f8SToomas Soome }
120199767f8SToomas Soome MOD_END(addr, c);
121199767f8SToomas Soome return(addr);
122199767f8SToomas Soome }
123199767f8SToomas Soome
124199767f8SToomas Soome /*
125199767f8SToomas Soome * Load the information expected by an i386 kernel.
126199767f8SToomas Soome *
127199767f8SToomas Soome * - The 'boothowto' argument is constructed
128199767f8SToomas Soome * - The 'bootdev' argument is constructed
129199767f8SToomas Soome * - The 'bootinfo' struct is constructed, and copied into the kernel space.
130199767f8SToomas Soome * - The kernel environment is copied into kernel space.
131199767f8SToomas Soome * - Module metadata are formatted and placed in kernel space.
132199767f8SToomas Soome */
133199767f8SToomas Soome int
bi_load32(char * args,int * howtop,int * bootdevp,vm_offset_t * bip,vm_offset_t * modulep,vm_offset_t * kernendp)134199767f8SToomas Soome bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip, vm_offset_t *modulep, vm_offset_t *kernendp)
135199767f8SToomas Soome {
136199767f8SToomas Soome struct preloaded_file *xp, *kfp;
137199767f8SToomas Soome struct i386_devdesc *rootdev;
138199767f8SToomas Soome struct file_metadata *md;
139199767f8SToomas Soome vm_offset_t addr;
140199767f8SToomas Soome vm_offset_t kernend;
141199767f8SToomas Soome vm_offset_t envp;
142199767f8SToomas Soome vm_offset_t size;
143199767f8SToomas Soome vm_offset_t ssym, esym;
144199767f8SToomas Soome char *rootdevname;
145199767f8SToomas Soome int bootdevnr, i, howto;
146199767f8SToomas Soome char *kernelname;
147199767f8SToomas Soome const char *kernelpath;
148199767f8SToomas Soome
149199767f8SToomas Soome howto = bi_getboothowto(args);
150199767f8SToomas Soome
151c142ce19SToomas Soome /*
152c142ce19SToomas Soome * Allow the environment variable 'rootdev' to override the supplied device
153199767f8SToomas Soome * This should perhaps go to MI code and/or have $rootdev tested/set by
154199767f8SToomas Soome * MI code before launching the kernel.
155199767f8SToomas Soome */
156199767f8SToomas Soome rootdevname = getenv("rootdev");
157199767f8SToomas Soome i386_getdev((void **)(&rootdev), rootdevname, NULL);
158199767f8SToomas Soome if (rootdev == NULL) { /* bad $rootdev/$currdev */
159199767f8SToomas Soome printf("can't determine root device\n");
160199767f8SToomas Soome return(EINVAL);
161199767f8SToomas Soome }
162199767f8SToomas Soome
163199767f8SToomas Soome /* Try reading the /etc/fstab file to select the root device */
164199767f8SToomas Soome getrootmount(i386_fmtdev((void *)rootdev));
165199767f8SToomas Soome
166199767f8SToomas Soome /* Do legacy rootdev guessing */
167199767f8SToomas Soome
168199767f8SToomas Soome /* XXX - use a default bootdev of 0. Is this ok??? */
169199767f8SToomas Soome bootdevnr = 0;
170199767f8SToomas Soome
171c142ce19SToomas Soome switch(rootdev->dd.d_dev->dv_type) {
172199767f8SToomas Soome case DEVT_CD:
173199767f8SToomas Soome case DEVT_DISK:
174199767f8SToomas Soome /* pass in the BIOS device number of the current disk */
175863275a4SToomas Soome bi.bi_bios_dev = bd_unit2bios(rootdev);
176199767f8SToomas Soome bootdevnr = bd_getdev(rootdev);
177199767f8SToomas Soome break;
178199767f8SToomas Soome
179199767f8SToomas Soome case DEVT_NET:
180199767f8SToomas Soome case DEVT_ZFS:
181199767f8SToomas Soome break;
18276b35943SToomas Soome
183199767f8SToomas Soome default:
18476b35943SToomas Soome printf("WARNING - don't know how to boot from device type %d\n",
185c142ce19SToomas Soome rootdev->dd.d_dev->dv_type);
186199767f8SToomas Soome }
187199767f8SToomas Soome if (bootdevnr == -1) {
188199767f8SToomas Soome printf("root device %s invalid\n", i386_fmtdev(rootdev));
189199767f8SToomas Soome return (EINVAL);
190199767f8SToomas Soome }
191199767f8SToomas Soome free(rootdev);
192199767f8SToomas Soome
193199767f8SToomas Soome /* find the last module in the chain */
194199767f8SToomas Soome addr = 0;
195199767f8SToomas Soome for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
196199767f8SToomas Soome if (addr < (xp->f_addr + xp->f_size))
197199767f8SToomas Soome addr = xp->f_addr + xp->f_size;
198199767f8SToomas Soome }
199199767f8SToomas Soome /* pad to a page boundary */
200199767f8SToomas Soome addr = roundup(addr, PAGE_SIZE);
201199767f8SToomas Soome
202199767f8SToomas Soome /* copy our environment */
203199767f8SToomas Soome envp = addr;
204199767f8SToomas Soome addr = bi_copyenv(addr);
205199767f8SToomas Soome
206199767f8SToomas Soome /* pad to a page boundary */
207199767f8SToomas Soome addr = roundup(addr, PAGE_SIZE);
208199767f8SToomas Soome
209199767f8SToomas Soome kfp = file_findfile(NULL, "elf kernel");
210199767f8SToomas Soome if (kfp == NULL)
211199767f8SToomas Soome kfp = file_findfile(NULL, "elf32 kernel");
212199767f8SToomas Soome if (kfp == NULL)
213199767f8SToomas Soome panic("can't find kernel file");
214199767f8SToomas Soome kernend = 0; /* fill it in later */
215199767f8SToomas Soome file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
216199767f8SToomas Soome file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
217199767f8SToomas Soome file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
218199767f8SToomas Soome bios_addsmapdata(kfp);
219199767f8SToomas Soome
220199767f8SToomas Soome /* Figure out the size and location of the metadata */
221199767f8SToomas Soome *modulep = addr;
222199767f8SToomas Soome size = bi_copymodules32(0);
223199767f8SToomas Soome kernend = roundup(addr + size, PAGE_SIZE);
224199767f8SToomas Soome *kernendp = kernend;
225199767f8SToomas Soome
226199767f8SToomas Soome /* patch MODINFOMD_KERNEND */
227199767f8SToomas Soome md = file_findmetadata(kfp, MODINFOMD_KERNEND);
228199767f8SToomas Soome bcopy(&kernend, md->md_data, sizeof kernend);
229199767f8SToomas Soome
230199767f8SToomas Soome /* copy module list and metadata */
231199767f8SToomas Soome (void)bi_copymodules32(addr);
232199767f8SToomas Soome
233199767f8SToomas Soome ssym = esym = 0;
234199767f8SToomas Soome md = file_findmetadata(kfp, MODINFOMD_SSYM);
235199767f8SToomas Soome if (md != NULL)
23657aea934SToomas Soome bcopy(&md->md_data, &ssym, sizeof (vm_offset_t));
237199767f8SToomas Soome md = file_findmetadata(kfp, MODINFOMD_ESYM);
238199767f8SToomas Soome if (md != NULL)
23957aea934SToomas Soome bcopy(&md->md_data, &esym, sizeof (vm_offset_t));
240199767f8SToomas Soome if (ssym == 0 || esym == 0)
241199767f8SToomas Soome ssym = esym = 0; /* sanity */
242199767f8SToomas Soome
243199767f8SToomas Soome /* legacy bootinfo structure */
244199767f8SToomas Soome kernelname = getenv("kernelname");
245199767f8SToomas Soome i386_getdev(NULL, kernelname, &kernelpath);
246199767f8SToomas Soome bi.bi_version = BOOTINFO_VERSION;
247199767f8SToomas Soome bi.bi_kernelname = 0; /* XXX char * -> kernel name */
248199767f8SToomas Soome bi.bi_nfs_diskless = 0; /* struct nfs_diskless * */
249199767f8SToomas Soome bi.bi_n_bios_used = 0; /* XXX would have to hook biosdisk driver for these */
250199767f8SToomas Soome for (i = 0; i < N_BIOS_GEOM; i++)
251199767f8SToomas Soome bi.bi_bios_geom[i] = bd_getbigeom(i);
252199767f8SToomas Soome bi.bi_size = sizeof(bi);
253199767f8SToomas Soome bi.bi_memsizes_valid = 1;
254199767f8SToomas Soome bi.bi_basemem = bios_basemem / 1024;
255199767f8SToomas Soome bi.bi_extmem = bios_extmem / 1024;
256199767f8SToomas Soome bi.bi_envp = envp;
257199767f8SToomas Soome bi.bi_modulep = *modulep;
258199767f8SToomas Soome bi.bi_kernend = kernend;
259199767f8SToomas Soome bi.bi_kernelname = VTOP(kernelpath);
260199767f8SToomas Soome bi.bi_symtab = ssym; /* XXX this is only the primary kernel symtab */
261199767f8SToomas Soome bi.bi_esymtab = esym;
262199767f8SToomas Soome
263199767f8SToomas Soome /* legacy boot arguments */
264199767f8SToomas Soome *howtop = howto | RB_BOOTINFO;
265199767f8SToomas Soome *bootdevp = bootdevnr;
266199767f8SToomas Soome *bip = VTOP(&bi);
267199767f8SToomas Soome
268199767f8SToomas Soome return(0);
269199767f8SToomas Soome }
270