2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $FreeBSD: src/sys/boot/alpha/libalpha/bootinfo.c,v 1.9.2.1 2001/03/04 05:20:26 obrien Exp $
27 * $DragonFly: src/sys/boot/alpha/libalpha/Attic/bootinfo.c,v 1.2 2003/06/17 04:28:16 dillon Exp $
32 #include <sys/param.h>
33 #include <sys/reboot.h>
34 #include <sys/linker.h>
35 #include <machine/elf.h>
36 #include <machine/prom.h>
37 #include <machine/rpb.h>
38 #include <machine/bootinfo.h>
39 #include "bootstrap.h"
41 extern char *alpha_fmtdev(void *vdev);
44 * Copy the environment into the load area starting at (addr).
45 * Each variable is formatted as <name>=<value>, with a single nul
46 * separating each variable, and a double nul terminating the environment.
49 bi_copyenv(vm_offset_t addr)
53 /* traverse the environment */
54 for (ep = environ; ep != NULL; ep = ep->ev_next) {
55 alpha_copyin(ep->ev_name, addr, strlen(ep->ev_name));
56 addr += strlen(ep->ev_name);
57 alpha_copyin("=", addr, 1);
59 if (ep->ev_value != NULL) {
60 alpha_copyin(ep->ev_value, addr, strlen(ep->ev_value));
61 addr += strlen(ep->ev_value);
63 alpha_copyin("", addr, 1);
66 alpha_copyin("", addr, 1);
72 * Copy module-related data into the load area, where it can be
73 * used as a directory for loaded modules.
75 * Module data is presented in a self-describing format. Each datum
76 * is preceded by a 32-bit identifier and a 32-bit size field.
78 * Currently, the following data are saved:
80 * MOD_NAME (variable) module name (string)
81 * MOD_TYPE (variable) module type (string)
82 * MOD_ARGS (variable) module parameters (string)
83 * MOD_ADDR sizeof(vm_offset_t) module load address
84 * MOD_SIZE sizeof(size_t) module size
85 * MOD_METADATA (variable) type-specific metadata
87 #define COPY32(v, a) { \
89 alpha_copyin(&x, a, sizeof(x)); \
93 #define MOD_STR(t, a, s) { \
95 COPY32(strlen(s) + 1, a); \
96 alpha_copyin(s, a, strlen(s) + 1); \
97 a += roundup(strlen(s) + 1, sizeof(u_int64_t));\
100 #define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s)
101 #define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s)
102 #define MOD_ARGS(a, s) MOD_STR(MODINFO_ARGS, a, s)
104 #define MOD_VAR(t, a, s) { \
106 COPY32(sizeof(s), a); \
107 alpha_copyin(&s, a, sizeof(s)); \
108 a += roundup(sizeof(s), sizeof(u_int64_t)); \
111 #define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s)
112 #define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s)
114 #define MOD_METADATA(a, mm) { \
115 COPY32(MODINFO_METADATA | mm->md_type, a); \
116 COPY32(mm->md_size, a); \
117 alpha_copyin(mm->md_data, a, mm->md_size); \
118 a += roundup(mm->md_size, sizeof(u_int64_t));\
121 #define MOD_END(a) { \
122 COPY32(MODINFO_END, a); \
127 bi_copymodules(vm_offset_t addr)
129 struct loaded_module *mp;
130 struct module_metadata *md;
132 /* start with the first module on the list, should be the kernel */
133 for (mp = mod_findmodule(NULL, NULL); mp != NULL; mp = mp->m_next) {
135 MOD_NAME(addr, mp->m_name); /* this field must come first */
136 MOD_TYPE(addr, mp->m_type);
138 MOD_ARGS(addr, mp->m_args);
139 MOD_ADDR(addr, mp->m_addr);
140 MOD_SIZE(addr, mp->m_size);
141 for (md = mp->m_metadata; md != NULL; md = md->md_next)
142 if (!(md->md_type & MODINFOMD_NOCOPY))
143 MOD_METADATA(addr, md);
150 * Load the information expected by an alpha kernel.
152 * - The kernel environment is copied into kernel space.
153 * - Module metadata are formatted and placed in kernel space.
156 bi_load(struct bootinfo_v1 *bi, vm_offset_t *ffp_save,
157 struct loaded_module *mp)
160 struct alpha_devdesc *rootdev;
161 struct loaded_module *xp;
162 vm_offset_t addr, bootinfo_addr;
165 vm_offset_t ssym, esym;
166 struct module_metadata *md;
169 * Allow the environment variable 'rootdev' to override the supplied device
170 * This should perhaps go to MI code and/or have $rootdev tested/set by
171 * MI code before launching the kernel.
173 rootdevname = getenv("rootdev");
174 alpha_getdev((void **)(&rootdev), rootdevname, NULL);
175 if (rootdev == NULL) { /* bad $rootdev/$currdev */
176 printf("can't determine root device\n");
180 /* Try reading the /etc/fstab file to select the root device */
181 getrootmount(alpha_fmtdev((void *)rootdev));
185 if ((md = mod_findmetadata(mp, MODINFOMD_SSYM)) != NULL)
186 ssym = *((vm_offset_t *)&(md->md_data));
187 if ((md = mod_findmetadata(mp, MODINFOMD_ESYM)) != NULL)
188 esym = *((vm_offset_t *)&(md->md_data));
189 if (ssym == 0 || esym == 0)
190 ssym = esym = 0; /* sanity */
195 /* find the last module in the chain */
197 for (xp = mod_findmodule(NULL, NULL); xp != NULL; xp = xp->m_next) {
198 if (addr < (xp->m_addr + xp->m_size))
199 addr = xp->m_addr + xp->m_size;
201 /* pad to a page boundary */
202 pad = (u_int)addr & PAGE_MASK;
204 pad = PAGE_SIZE - pad;
208 /* copy our environment */
209 bi->envp = (char *)addr;
210 addr = bi_copyenv(addr);
212 /* pad to a page boundary */
213 pad = (u_int)addr & PAGE_MASK;
215 pad = PAGE_SIZE - pad;
218 /* copy module list and metadata */
220 addr = bi_copymodules(addr);
222 /* all done copying stuff in, save end of loaded object space */
225 *ffp_save = ALPHA_K0SEG_TO_PHYS((addr + PAGE_MASK) & ~PAGE_MASK)
227 *ffp_save += 2; /* XXX OSF/1 does this, no idea why. */
229 kernelname = getenv("kernelname");
231 strncpy(bi->booted_kernel, kernelname, sizeof(bi->booted_kernel) - 1);