/*-
 * 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.
 *
 * $FreeBSD: src/sys/boot/i386/libi386/libi386.h,v 1.16 2003/05/01 03:56:29 peter Exp $
 */

#include <machine/types.h>      /* XXX for vm_offset_t */

/*
 * i386 fully-qualified device descriptor.
 * Note, this must match the 'struct devdesc' declaration
 * in bootstrap.h.
 */
struct i386_devdesc
{
    struct devsw        *d_dev;
    int                 d_type;
    union 
    {
        struct 
        {
            int         unit;
            int         slice;
            int         partition;
            void        *data;
        } biosdisk;
        struct
        {
            int         unit;
            void        *data;
        } bioscd;
        struct 
        {
            int         unit;           /* XXX net layer lives over these? */
        } netif;
    } d_kind;
};

static __inline u_int
read_eflags(void)
{
        u_int   ef;

        __asm __volatile("pushfl; popl %0" : "=r" (ef));
        return (ef);
}

static __inline void
write_eflags(u_int ef)
{
        __asm __volatile("pushl %0; popfl" : : "r" (ef));
}

/*
 * Max number of sectors to bounce-buffer if the request crosses a 64k boundary
 *
 * Bounce buffers can no longer be malloc()'d because the malloc pool
 * now uses high memory.  Declare statically.
 */
#define BOUNCEBUF_SIZE  8192
#define BOUNCEBUF_SECTS (BOUNCEBUF_SIZE / BIOSDISK_SECSIZE)

extern char     bounce_base[BOUNCEBUF_SIZE];

int     i386_getdev(void **vdev, const char *devspec, const char **path);
char    *i386_fmtdev(void *vdev);
int     i386_setcurrdev(struct env_var *ev, int flags, const void *value);

extern struct devdesc   currdev;        /* our current device */

#define MAXDEV  31                      /* maximum number of distinct devices */

/* exported devices XXX rename? */
extern struct devsw bioscd;
extern struct devsw biosdisk;
extern struct devsw pxedisk;
extern struct fs_ops pxe_fsops;

int     bc_add(int biosdev);            /* Register CD booted from. */
int     bc_getdev(struct i386_devdesc *dev);    /* return cdev_t for (dev) */
int     bc_bios2unit(int biosdev);      /* xlate BIOS device -> bioscd unit */
int     bc_unit2bios(int unit);         /* xlate bioscd unit -> BIOS device */
u_int32_t       bd_getbigeom(int bunit);        /* return geometry in bootinfo format */
int     bd_bios2unit(int biosdev);              /* xlate BIOS device -> biosdisk unit */
int     bd_unit2bios(int unit);                 /* xlate biosdisk unit -> BIOS device */
int     bd_getdev(struct i386_devdesc *dev);    /* return cdev_t for (dev) */

ssize_t i386_copyin(const void *src, vm_offset_t dest, const size_t len);
ssize_t i386_copyout(const vm_offset_t src, void *dest, const size_t len);
ssize_t i386_readin(const int fd, vm_offset_t dest, const size_t len);

struct preloaded_file;
void    bios_addsmapdata(struct preloaded_file *);
void    bios_getsmap(void);

void    bios_getmem(void);
extern u_int32_t        bios_basemem;                           /* base memory in bytes */
extern u_int32_t        bios_extmem;                            /* extended memory in bytes */
extern vm_offset_t      memtop;
extern vm_offset_t      heapbase;

void    biosacpi_detect(void);

int     i386_autoload(void);

int     bi_getboothowto(char *kargs);
vm_offset_t     bi_copyenv(vm_offset_t addr);
int     bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip,
            vm_offset_t *modulep, vm_offset_t *kernend);
int     bi_load64(char *args, vm_offset_t *modulep, vm_offset_t *kernend);

void    pxe_enable(void *pxeinfo);