/*-
 * 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.
 */


#include "disk.h"
#ifdef LOADER_ZFS_SUPPORT
#include "libzfs.h"
#endif
/*
 * i386 fully-qualified device descriptor.
 */
struct i386_devdesc
{
        union
        {
                struct devdesc dd;
                struct disk_devdesc disk;
#ifdef LOADER_ZFS_SUPPORT
                struct zfs_devdesc zfs;
#endif
        };
};

/*
 * relocater trampoline support.
 */
struct relocate_data {
        uint32_t        src;
        uint32_t        dest;
        uint32_t        size;
};

extern void relocater(void);

/*
 * The relocater_data[] is fixed size array allocated in relocater_tramp.S
 */
extern struct relocate_data relocater_data[];
extern uint32_t relocater_size;

extern uint16_t relocator_ip;
extern uint16_t relocator_cs;
extern uint16_t relocator_ds;
extern uint16_t relocator_es;
extern uint16_t relocator_fs;
extern uint16_t relocator_gs;
extern uint16_t relocator_ss;
extern uint16_t relocator_sp;
extern uint32_t relocator_esi;
extern uint32_t relocator_eax;
extern uint32_t relocator_ebx;
extern uint32_t relocator_edx;
extern uint32_t relocator_ebp;
extern uint16_t relocator_a20_enabled;

int     i386_getdev(void **vdev, const char *devspec, const char **path);
char    *i386_fmtdev(void *vdev);

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

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

#include <readin.h>

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

int     bc_add(int biosdev);            /* Register CD booted from. */
uint32_t bd_getbigeom(int bunit);       /* return geometry in bootinfo format */
int     bd_bios2unit(int biosdev);      /* xlate BIOS device -> biosdisk unit */
int     bd_unit2bios(struct i386_devdesc *); /* xlate biosdisk -> BIOS device */
int     bd_getdev(struct i386_devdesc *dev);    /* return dev_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(readin_handle_t 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 uint32_t         bios_basemem;   /* base memory in bytes */
extern uint32_t         bios_extmem;    /* extended memory in bytes */
extern vm_offset_t      memtop;         /* last address of physical memory + 1 */
extern vm_offset_t      memtop_copyin;  /* memtop less heap size for the cases */
                                        /*  when heap is at the top of         */
                                        /*  extended memory; for other cases   */
                                        /*  just the same as memtop            */
extern uint32_t         high_heap_size; /* extended memory region available */
extern vm_offset_t      high_heap_base; /* for use as the heap */

/* 16KB buffer space for real mode data transfers. */
#define BIO_BUFFER_SIZE 0x4000
void *bio_alloc(size_t size);
void bio_free(void *ptr, size_t size);

/*
 * Values for width parameter to biospci_{read,write}_config
 */
#define BIOSPCI_8BITS   0
#define BIOSPCI_16BITS  1
#define BIOSPCI_32BITS  2

void    biospci_detect(void);
int     biospci_find_devclass(uint32_t class, int index, uint32_t *locator);
int     biospci_read_config(uint32_t locator, int offset, int width, uint32_t *val);
uint32_t biospci_locator(int8_t bus, uint8_t device, uint8_t function);
int     biospci_write_config(uint32_t locator, int offset, int width, uint32_t val);

void    biosacpi_detect(void);

int     i386_autoload(void);

void    bi_load_vbe_data(struct preloaded_file *kfp);
int     bi_getboothowto(char *kargs);
void    bi_setboothowto(int howto);
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, int add_smap);

void    pxe_enable(void *pxeinfo);

void    biosmemdisk_detect(void);