1 /*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/boot/i386/libi386/libi386.h,v 1.16 2003/05/01 03:56:29 peter Exp $
27 */
28
29 #include <machine/types.h> /* XXX for vm_offset_t */
30
31 /*
32 * i386 fully-qualified device descriptor.
33 * Note, this must match the 'struct devdesc' declaration
34 * in bootstrap.h.
35 */
36 struct i386_devdesc
37 {
38 struct devsw *d_dev;
39 int d_type;
40 union
41 {
42 struct
43 {
44 int unit;
45 int slice;
46 int partition;
47 void *data;
48 } biosdisk;
49 struct
50 {
51 int unit;
52 void *data;
53 } bioscd;
54 struct
55 {
56 int unit; /* XXX net layer lives over these? */
57 } netif;
58 } d_kind;
59 };
60
61 static __inline u_int
read_eflags(void)62 read_eflags(void)
63 {
64 u_int ef;
65
66 __asm __volatile("pushfl; popl %0" : "=r" (ef));
67 return (ef);
68 }
69
70 static __inline void
write_eflags(u_int ef)71 write_eflags(u_int ef)
72 {
73 __asm __volatile("pushl %0; popfl" : : "r" (ef));
74 }
75
76 /*
77 * Max number of sectors to bounce-buffer if the request crosses a 64k boundary
78 *
79 * Bounce buffers can no longer be malloc()'d because the malloc pool
80 * now uses high memory. Declare statically.
81 */
82 #define BOUNCEBUF_SIZE 8192
83 #define BOUNCEBUF_SECTS (BOUNCEBUF_SIZE / BIOSDISK_SECSIZE)
84
85 extern char bounce_base[BOUNCEBUF_SIZE];
86
87 int i386_getdev(void **vdev, const char *devspec, const char **path);
88 char *i386_fmtdev(void *vdev);
89 int i386_setcurrdev(struct env_var *ev, int flags, const void *value);
90
91 extern struct devdesc currdev; /* our current device */
92
93 #define MAXDEV 31 /* maximum number of distinct devices */
94
95 /* exported devices XXX rename? */
96 extern struct devsw bioscd;
97 extern struct devsw biosdisk;
98 extern struct devsw pxedisk;
99 extern struct fs_ops pxe_fsops;
100
101 int bc_add(int biosdev); /* Register CD booted from. */
102 int bc_getdev(struct i386_devdesc *dev); /* return cdev_t for (dev) */
103 int bc_bios2unit(int biosdev); /* xlate BIOS device -> bioscd unit */
104 int bc_unit2bios(int unit); /* xlate bioscd unit -> BIOS device */
105 u_int32_t bd_getbigeom(int bunit); /* return geometry in bootinfo format */
106 int bd_bios2unit(int biosdev); /* xlate BIOS device -> biosdisk unit */
107 int bd_unit2bios(int unit); /* xlate biosdisk unit -> BIOS device */
108 int bd_getdev(struct i386_devdesc *dev); /* return cdev_t for (dev) */
109
110 ssize_t i386_copyin(const void *src, vm_offset_t dest, const size_t len);
111 ssize_t i386_copyout(const vm_offset_t src, void *dest, const size_t len);
112 ssize_t i386_readin(const int fd, vm_offset_t dest, const size_t len);
113
114 struct preloaded_file;
115 void bios_addsmapdata(struct preloaded_file *);
116 void bios_getsmap(void);
117
118 void bios_getmem(void);
119 extern u_int32_t bios_basemem; /* base memory in bytes */
120 extern u_int32_t bios_extmem; /* extended memory in bytes */
121 extern vm_offset_t memtop;
122 extern vm_offset_t heapbase;
123
124 void biosacpi_detect(void);
125
126 int i386_autoload(void);
127
128 int bi_getboothowto(char *kargs);
129 vm_offset_t bi_copyenv(vm_offset_t addr);
130 int bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip,
131 vm_offset_t *modulep, vm_offset_t *kernend);
132 int bi_load64(char *args, vm_offset_t *modulep, vm_offset_t *kernend);
133
134 void pxe_enable(void *pxeinfo);
135