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freebsd-dev/sys/boot/i386/libi386/libi386.h

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This is the new unified bootstrap, sometimes known previously as the 'three-stage' bootstrap. There are a number of caveats with the code in its current state: - The i386 bootstrap only supports booting from a floppy. - The kernel and kld do not yet know how to deal with the extended information and module summary passed in. - PnP-based autodetection and demand loading of modules is not implemented. - i386 ELF kernel loading is not ready yet. - The i386 bootstrap is loaded via an ugly blockmap. On the alpha, both net- and disk-booting (SRM console machines only) is supported. No blockmaps are used by this code. Obtained from: Parts from the NetBSD/i386 standalone bootstrap.
1998-08-21 03:17:42 +00:00
/*-
* 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.
*
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
This is the new unified bootstrap, sometimes known previously as the 'three-stage' bootstrap. There are a number of caveats with the code in its current state: - The i386 bootstrap only supports booting from a floppy. - The kernel and kld do not yet know how to deal with the extended information and module summary passed in. - PnP-based autodetection and demand loading of modules is not implemented. - i386 ELF kernel loading is not ready yet. - The i386 bootstrap is loaded via an ugly blockmap. On the alpha, both net- and disk-booting (SRM console machines only) is supported. No blockmaps are used by this code. Obtained from: Parts from the NetBSD/i386 standalone bootstrap.
1998-08-21 03:17:42 +00:00
*/
/*
* 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; /* XXX net layer lives over these? */
} netif;
} d_kind;
};
* Add old UFS compatibility code to alpha/boot1. * Fix a raft of warnings, printf and otherwise. * Allocate the correct amount in mod_searchmodule to prevent an overflow. * Fix the makefiles so they work outside my home directory (oops).
1998-09-26 10:51:38 +00:00
extern int i386_getdev(void **vdev, const char *devspec, const char **path);
This is the new unified bootstrap, sometimes known previously as the 'three-stage' bootstrap. There are a number of caveats with the code in its current state: - The i386 bootstrap only supports booting from a floppy. - The kernel and kld do not yet know how to deal with the extended information and module summary passed in. - PnP-based autodetection and demand loading of modules is not implemented. - i386 ELF kernel loading is not ready yet. - The i386 bootstrap is loaded via an ugly blockmap. On the alpha, both net- and disk-booting (SRM console machines only) is supported. No blockmaps are used by this code. Obtained from: Parts from the NetBSD/i386 standalone bootstrap.
1998-08-21 03:17:42 +00:00
extern char *i386_fmtdev(void *vdev);
extern int i386_setcurrdev(struct env_var *ev, int flags, void *value);
extern struct devdesc currdev; /* our current device */
#define MAXDEV 31 /* maximum number of distinct devices */
/* exported devices XXX rename? */
extern struct devsw biosdisk;
Fill in bi_bios_geom[] in the bootinfo structure passed to the kernel. This should resolve the problem raised in PR 12315, and incidentally makes it easier to determine what geometry the BIOS is actually using (by way of boot -v and dmesg).
1999-06-21 18:27:02 +00:00
u_int32_t bd_getbigeom(int bunit); /* return geometry in bootinfo format */
aout_freebsd.c Use bd_getdev() to work out a dev_t for the root device. Allow $rootdev to override $currdev as the root device. biosdisk.c Save the slice table and disklabel when opening a disk. Add bd_getdev(), which attempts to return a dev_t corresponding to a given device. Cases which it still doesn't get right: - The inevitable da-when-wd-also-exists - Disks with no slice table (the slice number is not set correctly) The first is difficult to get right, the second will be fixed in an upcoming commit. comconsole.c vidconsole.c getchar() should return an 8-bit value; some BIOSsen pack extra information in %eax. libi386.h Remove some stale prototypes, add new ones.
1998-10-02 16:32:45 +00:00
extern int bd_bios2unit(int biosdev); /* xlate BIOS device -> biosdisk unit */
extern int bd_unit2bios(int unit); /* xlate biosdisk unit -> BIOS device */
extern int bd_getdev(struct i386_devdesc *dev); /* return dev_t for (dev) */
This is the new unified bootstrap, sometimes known previously as the 'three-stage' bootstrap. There are a number of caveats with the code in its current state: - The i386 bootstrap only supports booting from a floppy. - The kernel and kld do not yet know how to deal with the extended information and module summary passed in. - PnP-based autodetection and demand loading of modules is not implemented. - i386 ELF kernel loading is not ready yet. - The i386 bootstrap is loaded via an ugly blockmap. On the alpha, both net- and disk-booting (SRM console machines only) is supported. No blockmaps are used by this code. Obtained from: Parts from the NetBSD/i386 standalone bootstrap.
1998-08-21 03:17:42 +00:00
Bootloader update. - Implement a new copyin/readin interface for loading modules. This allows the module loaders to become MI, reducing code duplication. - Simplify the search for an image activator for the loaded kernel. - Use the common module management code for all module metadata. - Add an 'unload' command that throws everything away. - Move the a.out module loader to MI code, add support for a.out kld modules. Submitted by: Alpha changes fixed by Doug Rabson <dfr@freebsd.org>
1998-08-31 21:10:43 +00:00
extern int i386_copyin(void *src, vm_offset_t dest, size_t len);
Bootstrap updates. - Move some startup code from MD to MI sections - Add a 'copyout' and some copyout-related functions. These will be obsoleted when BTX is available for the 386 and the kernel load area becomes directly addressable. - Add the ability load an arbitrary file as a module, associating and arbitrary type string with it. This can be used eg. for loading splash-screen images etc. - Add KLD module dependancy infrastructure. We know how to look for dependancies inside KLD modules, how to resolve these dependancies and what to do if things go wrong. Only works for a.out at the moment, due to lack of an MI ELF loader. Attach KLD module information to loaded modules as metadata, but don't pass it to the kernel (it can find it itself). - Load a.out KLD modules on a page boundary. Only pad the a.out BSS for the kernel, as it may want to throw symbols away. (We might want to do this for KLD modules too.) - Allow commands to be hidden from the '?' display, to avoid cluttering it with things like 'echo'. Add 'echo'. - Bring the 'prompt' command into line with the parser syntax. - Fix the verbose 'ls'; it was using an uninitialised stack variable. - Add a '-v' flag to 'lsmod' to have it display module metadata as well (not terribly useful for the average user) - Support a 'module searchpath' for required modules. - The bootstrap file on i386 is now called 'loader' to permit the /boot directory to use that name. - Discard the old i386 pread() function, as it's replaced by arch_readin()
1998-09-03 02:10:09 +00:00
extern int i386_copyout(vm_offset_t src, void *dest, size_t len);
Bootloader update. - Implement a new copyin/readin interface for loading modules. This allows the module loaders to become MI, reducing code duplication. - Simplify the search for an image activator for the loaded kernel. - Use the common module management code for all module metadata. - Add an 'unload' command that throws everything away. - Move the a.out module loader to MI code, add support for a.out kld modules. Submitted by: Alpha changes fixed by Doug Rabson <dfr@freebsd.org>
1998-08-31 21:10:43 +00:00
extern int i386_readin(int fd, vm_offset_t dest, size_t len);
Substantially revamp the way that we determine the amount of memory available for our use. Use the same search order for BIOS memory size functions as the kernel will later use. Allow the loader to use all of the detected physical memory (this will greatly help people trying to load enormous memory disk images). More correctly handle running out of memory when loading an object. Use the end of base memory for the top of the heap, rather than blindly hoping that there is 384k left. Add copyrights to a couple of files I forgot.
1999-12-29 09:54:46 +00:00
extern void bios_getmem(void);
extern u_int32_t bios_basemem; /* base memory in bytes */
extern u_int32_t bios_extmem; /* extended memory in bytes */
Initial integration of the i386 bootloader and BTX. - Discard large amounts of BIOS-related code in favour of the more compact BTX vm86 interface. - Build the loader module as ELF, although the resulting object is a.out, make gensetdefs 32/64-bit sensitive and use a single copy of it. - Throw away installboot, as it's no longer required. - Use direct bcopy operations in the i386_copy module, as BTX maps the first 16M of memory. Check operations against the detected size of actual memory.
1998-09-17 23:52:16 +00:00
extern vm_offset_t memtop;
This is the new unified bootstrap, sometimes known previously as the 'three-stage' bootstrap. There are a number of caveats with the code in its current state: - The i386 bootstrap only supports booting from a floppy. - The kernel and kld do not yet know how to deal with the extended information and module summary passed in. - PnP-based autodetection and demand loading of modules is not implemented. - i386 ELF kernel loading is not ready yet. - The i386 bootstrap is loaded via an ugly blockmap. On the alpha, both net- and disk-booting (SRM console machines only) is supported. No blockmaps are used by this code. Obtained from: Parts from the NetBSD/i386 standalone bootstrap.
1998-08-21 03:17:42 +00:00
extern void gateA20(void);
extern int i386_autoload(void);
extern int bi_getboothowto(char *kargs);
extern vm_offset_t bi_copyenv(vm_offset_t addr);
Consolidate the bootinfo-loading code, greatly simplifying the _exec functions.
1998-10-02 20:53:17 +00:00
extern int bi_load(char *args, int *howtop, int *bootdevp, vm_offset_t *bip);
Initial integration of the i386 bootloader and BTX. - Discard large amounts of BIOS-related code in favour of the more compact BTX vm86 interface. - Build the loader module as ELF, although the resulting object is a.out, make gensetdefs 32/64-bit sensitive and use a single copy of it. - Throw away installboot, as it's no longer required. - Use direct bcopy operations in the i386_copy module, as BTX maps the first 16M of memory. Check operations against the detected size of actual memory.
1998-09-17 23:52:16 +00:00
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