1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
|
/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: FreeBSD: src/sys/boot/i386/libi386/bootinfo.c,v 1.29
* $FreeBSD$
*/
#include <stand.h>
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/linker.h>
#include <machine/metadata.h>
#include "bootstrap.h"
#include "libofw.h"
extern struct tlb_entry *dtlb_store;
extern struct tlb_entry *itlb_store;
extern int dtlb_slot;
extern int itlb_slot;
/*
* Return a 'boothowto' value corresponding to the kernel arguments in
* (kargs) and any relevant environment variables.
*/
static struct
{
const char *ev;
int mask;
} howto_names[] = {
{"boot_askname", RB_ASKNAME},
{"boot_cdrom", RB_CDROM},
{"boot_userconfig", RB_CONFIG},
{"boot_ddb", RB_KDB},
{"boot_gdb", RB_GDB},
{"boot_single", RB_SINGLE},
{"boot_verbose", RB_VERBOSE},
{"boot_multicons", RB_MULTIPLE},
{"boot_serial", RB_SERIAL},
{NULL, 0}
};
int
md_getboothowto(char *kargs)
{
char buf[32];
phandle_t options;
char *cp;
int howto;
int active;
int i;
/* Parse kargs */
howto = 0;
if (kargs != NULL) {
cp = kargs;
active = 0;
while (*cp != 0) {
if (!active && (*cp == '-')) {
active = 1;
} else if (active)
switch (*cp) {
case 'a':
howto |= RB_ASKNAME;
break;
case 'c':
howto |= RB_CONFIG;
break;
case 'C':
howto |= RB_CDROM;
break;
case 'd':
howto |= RB_KDB;
break;
case 'D':
howto |= RB_MULTIPLE;
break;
case 'm':
howto |= RB_MUTE;
break;
case 'g':
howto |= RB_GDB;
break;
case 'h':
howto |= RB_SERIAL;
break;
case 'r':
howto |= RB_DFLTROOT;
break;
case 's':
howto |= RB_SINGLE;
break;
case 'v':
howto |= RB_VERBOSE;
break;
default:
active = 0;
break;
}
cp++;
}
}
/* get equivalents from the environment */
for (i = 0; howto_names[i].ev != NULL; i++)
if (getenv(howto_names[i].ev) != NULL)
howto |= howto_names[i].mask;
options = OF_finddevice("/options");
OF_getprop(options, "output-device", buf, sizeof(buf));
if (strcmp(buf, "ttya") == 0 || strcmp(buf, "ttyb") == 0)
howto |= RB_SERIAL;
return(howto);
}
/*
* Copy the environment into the load area starting at (addr).
* Each variable is formatted as <name>=<value>, with a single nul
* separating each variable, and a double nul terminating the environment.
*/
vm_offset_t
md_copyenv(vm_offset_t addr)
{
struct env_var *ep;
/* traverse the environment */
for (ep = environ; ep != NULL; ep = ep->ev_next) {
archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name));
addr += strlen(ep->ev_name);
archsw.arch_copyin("=", addr, 1);
addr++;
if (ep->ev_value != NULL) {
archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value));
addr += strlen(ep->ev_value);
}
archsw.arch_copyin("", addr, 1);
addr++;
}
archsw.arch_copyin("", addr, 1);
addr++;
return(addr);
}
/*
* Copy module-related data into the load area, where it can be
* used as a directory for loaded modules.
*
* Module data is presented in a self-describing format. Each datum
* is preceded by a 32-bit identifier and a 32-bit size field.
*
* Currently, the following data are saved:
*
* MOD_NAME (variable) module name (string)
* MOD_TYPE (variable) module type (string)
* MOD_ARGS (variable) module parameters (string)
* MOD_ADDR sizeof(vm_offset_t) module load address
* MOD_SIZE sizeof(size_t) module size
* MOD_METADATA (variable) type-specific metadata
*/
#define COPY32(v, a, c) { \
u_int32_t x = (v); \
if (c) \
archsw.arch_copyin(&x, a, sizeof(x)); \
a += sizeof(x); \
}
#define MOD_STR(t, a, s, c) { \
COPY32(t, a, c); \
COPY32(strlen(s) + 1, a, c) \
if (c) \
archsw.arch_copyin(s, a, strlen(s) + 1);\
a += roundup(strlen(s) + 1, sizeof(u_long));\
}
#define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
#define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
#define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
#define MOD_VAR(t, a, s, c) { \
COPY32(t, a, c); \
COPY32(sizeof(s), a, c); \
if (c) \
archsw.arch_copyin(&s, a, sizeof(s)); \
a += roundup(sizeof(s), sizeof(u_long)); \
}
#define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
#define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
#define MOD_METADATA(a, mm, c) { \
COPY32(MODINFO_METADATA | mm->md_type, a, c);\
COPY32(mm->md_size, a, c); \
if (c) \
archsw.arch_copyin(mm->md_data, a, mm->md_size);\
a += roundup(mm->md_size, sizeof(u_long)); \
}
#define MOD_END(a, c) { \
COPY32(MODINFO_END, a, c); \
COPY32(0, a, c); \
}
vm_offset_t
md_copymodules(vm_offset_t addr)
{
struct preloaded_file *fp;
struct file_metadata *md;
int c;
c = addr != 0;
/* start with the first module on the list, should be the kernel */
for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
MOD_NAME(addr, fp->f_name, c); /* this field must come first */
MOD_TYPE(addr, fp->f_type, c);
if (fp->f_args)
MOD_ARGS(addr, fp->f_args, c);
MOD_ADDR(addr, fp->f_addr, c);
MOD_SIZE(addr, fp->f_size, c);
for (md = fp->f_metadata; md != NULL; md = md->md_next) {
if (!(md->md_type & MODINFOMD_NOCOPY)) {
MOD_METADATA(addr, md, c);
}
}
}
MOD_END(addr, c);
return(addr);
}
/*
* Load the information expected by a sparc64 kernel.
*
* - The 'boothowto' argument is constructed
* - The 'bootdev' argument is constructed
* - The kernel environment is copied into kernel space.
* - Module metadata are formatted and placed in kernel space.
*/
int
md_load(char *args, vm_offset_t *modulep)
{
struct preloaded_file *kfp;
struct preloaded_file *xp;
struct file_metadata *md;
vm_offset_t kernend;
vm_offset_t addr;
vm_offset_t envp;
vm_offset_t size;
char *rootdevname;
int howto;
howto = md_getboothowto(args);
/*
* Allow the environment variable 'rootdev' to override the supplied device
* This should perhaps go to MI code and/or have $rootdev tested/set by
* MI code before launching the kernel.
*/
if ((rootdevname = getenv("rootdev")) == NULL)
rootdevname = getenv("currdev");
getrootmount(rootdevname);
/* find the last module in the chain */
addr = 0;
for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
if (addr < (xp->f_addr + xp->f_size))
addr = xp->f_addr + xp->f_size;
}
/* pad to a page boundary */
addr = roundup(addr, PAGE_SIZE);
/* copy our environment */
envp = addr;
addr = md_copyenv(addr);
/* pad to a page boundary */
addr = roundup(addr, PAGE_SIZE);
kernend = 0;
kfp = file_findfile(NULL, "elf64 kernel");
if (kfp == NULL)
kfp = file_findfile(NULL, "elf kernel");
if (kfp == NULL)
panic("can't find kernel file");
file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
file_addmetadata(kfp, MODINFOMD_DTLB_SLOTS, sizeof dtlb_slot, &dtlb_slot);
file_addmetadata(kfp, MODINFOMD_ITLB_SLOTS, sizeof itlb_slot, &itlb_slot);
file_addmetadata(kfp, MODINFOMD_DTLB,
dtlb_slot * sizeof(*dtlb_store), dtlb_store);
file_addmetadata(kfp, MODINFOMD_ITLB,
itlb_slot * sizeof(*itlb_store), itlb_store);
*modulep = addr;
size = md_copymodules(0);
kernend = roundup(addr + size, PAGE_SIZE);
md = file_findmetadata(kfp, MODINFOMD_KERNEND);
bcopy(&kernend, md->md_data, sizeof kernend);
(void)md_copymodules(addr);
return(0);
}
|