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/arc/lib/bootinfo.c,v 1.2.2.1 2001/03/04 04:40:41 obrien Exp $
31 #include <sys/param.h>
32 #include <sys/reboot.h>
33 #include <sys/linker.h>
34 #include <machine/elf.h>
35 #include <machine/prom.h>
36 #include <machine/rpb.h>
37 #include <machine/bootinfo.h>
38 #include "bootstrap.h"
41 * Copy the environment into the load area starting at (addr).
42 * Each variable is formatted as <name>=<value>, with a single nul
43 * separating each variable, and a double nul terminating the environment.
46 bi_copyenv(vm_offset_t addr)
50 /* traverse the environment */
51 for (ep = environ; ep != NULL; ep = ep->ev_next) {
52 alpha_copyin(ep->ev_name, addr, strlen(ep->ev_name));
53 addr += strlen(ep->ev_name);
54 alpha_copyin("=", addr, 1);
56 if (ep->ev_value != NULL) {
57 alpha_copyin(ep->ev_value, addr, strlen(ep->ev_value));
58 addr += strlen(ep->ev_value);
60 alpha_copyin("", addr, 1);
63 alpha_copyin("", addr, 1);
69 * Copy module-related data into the load area, where it can be
70 * used as a directory for loaded modules.
72 * Module data is presented in a self-describing format. Each datum
73 * is preceded by a 32-bit identifier and a 32-bit size field.
75 * Currently, the following data are saved:
77 * MOD_NAME (variable) module name (string)
78 * MOD_TYPE (variable) module type (string)
79 * MOD_ADDR sizeof(vm_offset_t) module load address
80 * MOD_SIZE sizeof(size_t) module size
81 * MOD_METADATA (variable) type-specific metadata
83 #define COPY32(v, a) { \
85 alpha_copyin(&x, a, sizeof(x)); \
89 #define MOD_STR(t, a, s) { \
91 COPY32(strlen(s) + 1, a); \
92 alpha_copyin(s, a, strlen(s) + 1); \
93 a += roundup(strlen(s) + 1, sizeof(u_int64_t));\
96 #define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s)
97 #define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s)
99 #define MOD_VAR(t, a, s) { \
101 COPY32(sizeof(s), a); \
102 alpha_copyin(&s, a, sizeof(s)); \
103 a += roundup(sizeof(s), sizeof(u_int64_t)); \
106 #define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s)
107 #define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s)
109 #define MOD_METADATA(a, mm) { \
110 COPY32(MODINFO_METADATA | mm->md_type, a); \
111 COPY32(mm->md_size, a); \
112 alpha_copyin(mm->md_data, a, mm->md_size); \
113 a += roundup(mm->md_size, sizeof(u_int64_t));\
116 #define MOD_END(a) { \
117 COPY32(MODINFO_END, a); \
122 bi_copymodules(vm_offset_t addr)
124 struct loaded_module *mp;
125 struct module_metadata *md;
127 /* start with the first module on the list, should be the kernel */
128 for (mp = mod_findmodule(NULL, NULL); mp != NULL; mp = mp->m_next) {
130 MOD_NAME(addr, mp->m_name); /* this field must come first */
131 MOD_TYPE(addr, mp->m_type);
132 MOD_ADDR(addr, mp->m_addr);
133 MOD_SIZE(addr, mp->m_size);
134 for (md = mp->m_metadata; md != NULL; md = md->md_next)
135 if (!(md->md_type & MODINFOMD_NOCOPY))
136 MOD_METADATA(addr, md);
143 * Load the information expected by an alpha kernel.
145 * - The kernel environment is copied into kernel space.
146 * - Module metadata are formatted and placed in kernel space.
149 bi_load(struct bootinfo_v1 *bi, vm_offset_t *ffp_save,
150 struct loaded_module *mp)
152 struct loaded_module *xp;
153 vm_offset_t addr, bootinfo_addr;
155 vm_offset_t ssym, esym;
156 struct module_metadata *md;
159 if ((md = mod_findmetadata(mp, MODINFOMD_SSYM)) != NULL)
160 ssym = *((vm_offset_t *)&(md->md_data));
161 if ((md = mod_findmetadata(mp, MODINFOMD_ESYM)) != NULL)
162 esym = *((vm_offset_t *)&(md->md_data));
163 if (ssym == 0 || esym == 0)
164 ssym = esym = 0; /* sanity */
169 /* find the last module in the chain */
171 for (xp = mod_findmodule(NULL, NULL); xp != NULL; xp = xp->m_next) {
172 if (addr < (xp->m_addr + xp->m_size))
173 addr = xp->m_addr + xp->m_size;
175 /* pad to a page boundary */
176 pad = (u_int)addr & PAGE_MASK;
178 pad = PAGE_SIZE - pad;
182 /* copy our environment */
183 bi->envp = (char *)addr;
184 addr = bi_copyenv(addr);
186 /* pad to a page boundary */
187 pad = (u_int)addr & PAGE_MASK;
189 pad = PAGE_SIZE - pad;
192 /* copy module list and metadata */
194 addr = bi_copymodules(addr);
196 /* all done copying stuff in, save end of loaded object space */
199 *ffp_save = ALPHA_K0SEG_TO_PHYS((addr + PAGE_MASK) & ~PAGE_MASK)
201 *ffp_save += 2; /* XXX OSF/1 does this, no idea why. */