48a0b96a50
things over floppy size limits, I can exclude it for release builds or something like that. Most of the changes are to get the load_elf.c file into a seperate elf32_ or elf64_ namespace so that you can have two ELF loaders present at once. Note that for 64 bit kernels, it actually starts up the kernel already in 64 bit mode with paging enabled. This is really easy because we have a known minimum feature set. Of note is that for amd64, we have to pass in the bios int 15 0xe821 memory map because once in long mode, you absolutely cannot make VM86 calls. amd64 does not use 'struct bootinfo' at all. It is a pure loader metadata startup, just like sparc64 and powerpc. Much of the infrastructure to support this was adapted from sparc64.
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* i386 fully-qualified device descriptor.
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* Note, this must match the 'struct devdesc' declaration
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* in bootstrap.h.
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*/
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struct i386_devdesc
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{
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struct devsw *d_dev;
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int d_type;
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union
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{
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struct
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{
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int unit;
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int slice;
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int partition;
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void *data;
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} biosdisk;
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struct
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{
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int unit;
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void *data;
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} bioscd;
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struct
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{
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int unit; /* XXX net layer lives over these? */
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} netif;
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} d_kind;
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};
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int i386_getdev(void **vdev, const char *devspec, const char **path);
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char *i386_fmtdev(void *vdev);
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int i386_setcurrdev(struct env_var *ev, int flags, void *value);
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extern struct devdesc currdev; /* our current device */
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#define MAXDEV 31 /* maximum number of distinct devices */
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/* exported devices XXX rename? */
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extern struct devsw bioscd;
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extern struct devsw biosdisk;
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extern struct devsw pxedisk;
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extern struct fs_ops pxe_fsops;
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int bc_add(int biosdev); /* Register CD booted from. */
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int bc_getdev(struct i386_devdesc *dev); /* return dev_t for (dev) */
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int bc_bios2unit(int biosdev); /* xlate BIOS device -> bioscd unit */
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int bc_unit2bios(int unit); /* xlate bioscd unit -> BIOS device */
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u_int32_t bd_getbigeom(int bunit); /* return geometry in bootinfo format */
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int bd_bios2unit(int biosdev); /* xlate BIOS device -> biosdisk unit */
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int bd_unit2bios(int unit); /* xlate biosdisk unit -> BIOS device */
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int bd_getdev(struct i386_devdesc *dev); /* return dev_t for (dev) */
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ssize_t i386_copyin(const void *src, vm_offset_t dest, const size_t len);
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ssize_t i386_copyout(const vm_offset_t src, void *dest, const size_t len);
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ssize_t i386_readin(const int fd, vm_offset_t dest, const size_t len);
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struct preloaded_file;
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void bios_addsmapdata(struct preloaded_file *);
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void bios_getsmap(void);
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void bios_getmem(void);
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extern u_int32_t bios_basemem; /* base memory in bytes */
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extern u_int32_t bios_extmem; /* extended memory in bytes */
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extern vm_offset_t memtop;
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void biosacpi_detect();
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void gateA20(void);
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int i386_autoload(void);
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int bi_getboothowto(char *kargs);
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vm_offset_t bi_copyenv(vm_offset_t addr);
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int bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip,
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vm_offset_t *modulep, vm_offset_t *kernend);
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int bi_load64(char *args, vm_offset_t *modulep, vm_offset_t *kernend);
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void pxe_enable(void *pxeinfo);
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