src/sys/boot/alpha/libalpha/srmdisk.c, branch release/4.1.0_cvs

This commit was manufactured by cvs2svn to create tag

2000-07-26T21:12:35+00:00

'RELENG_4_1_0_RELEASE'.

This commit was manufactured to restore the state of the 4.1-RELEASE image.
Releases prior to 5.3-RELEASE are omitting the secure/ and crypto/ subdirs.

MFC the loader bcache fixes.

2000-03-16T18:13:37+00:00

Submitted by:	dcs

Remove BAD144 support, it has already been disabled for some time.

1999-12-08T09:33:00+00:00

Allow this driver to open disks with no labels (CDROMS don't).

1999-10-12T20:04:46+00:00

* Fix a stack of warnings.

1999-09-01T09:11:14+00:00

* Make it possible to type a filename to boot1 so that it is possible to
  recover from fatally broken versions of /boot/loader.
* Make a start at a CD boot program (not yet functional).

$Id$ -> $FreeBSD$

1999-08-28T01:08:13+00:00

Include "bootstrap.h" to get a definition for bcache_devdata.

1998-11-03T23:44:49+00:00

Submitted by:	jkh

Implement a simple LRU block cache. By default this is initialised to 16k,

1998-11-02T23:28:11+00:00

and will bypass transfers for more than 8k.  Blocks are invalidated after
2 seconds, so removable media should not confuse the cache.

The 8k threshold is a compromise; all UFS transfers performed by
libstand are 8k or less, so large file reads thrash the cache.
However many filesystem metadata operations are also performed using
8k blocks, so using a lower threshold gives poor performance.

Those of you with an eye for cache algorithms are welcome to tell me
how badly this one sucks; you can start with the 'bcachestats' command
which will print the contents of the cache and access statistics.

* Extend the memory available for the heap from 256k to 512k.

1998-10-31T17:12:32+00:00

* Embed the stack into the bss section for loader and netboot.  This
  is required for netboot since otherwise the stack would be inside our
  heap.
* Install loader and netboot in /boot by default.
* Fix getbootfile so that it searches for a ',' instead of a ';'
  when terminating the filename.

This is the new unified bootstrap, sometimes known previously as the

1998-08-21T03:17:42+00:00

'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.