david/ipxe
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12 Commits

Author SHA1 Message Date
Michael Brown
88e38fa148 We don't actually have a stdio.h header file. Our printf() functions are
defined in vsprintf.h.  (This may change, since vsprintf.h is a
non-standard name, but for now it's the one to use.)

There should be no need to include vsprintf.h just for DBG() statements,
since include/compiler.h forces it in for a debug build anyway.
2006-09-27 10:58:14 +00:00
Marty Connor
6ac78f6aff added stdio.h to includes for DBG compilation 2006-09-27 05:57:06 +00:00
Michael Brown
2e49441535 Updated debug message to reflect change in data structure. 2006-06-12 01:10:08 +00:00
Michael Brown
1f394c2f7c Backing out last change; no immediate plans to make the whole block-device
layer asynchronous, so keeping the sync/async boundary within aoedev.c
seems cleanest for now.
2006-06-01 11:14:59 +00:00
Michael Brown
99ef98d0bf ATA devices are now asynchronous. The ATA layer itself now performs the
async_wait(), though we may wish to move this higher up the stack, and
consider making the block device model asynchronous.  (There is only a
marginal cost for synchronous devices, since they can simply call
async_done() before returning; async_wait() will work seamlessly in this
situation).
2006-05-31 18:57:11 +00:00
Michael Brown
68125bc441 Added generic asynchronous operations code.
Removed data_in_len and data_out_len from ata_command structure; the
lengths are implied by the sector count and the presence of the data_in
or data_out pointers.

Changed AoE code to use subcommands by default, and made aoe_issue()
nonblocking (with completion via async_wait()).
2006-05-31 14:34:17 +00:00
Michael Brown
6f998cecb3 Use separate data-in and data-out buffers.
Increase code simplicity at the expense of around 64 bytes.
2006-05-28 23:26:42 +00:00
Michael Brown
95956443e1 Fixed debug code 2006-05-21 16:04:41 +00:00
Michael Brown
80958ff69c Added (untested) support for ATA devices. This code should be generic
enough to support both real IDE chipsets and AoE.
2006-05-21 16:01:23 +00:00
Michael Brown
402ba15c64 READ CAPACITY (16) turns out to be an optional command (even though
READ(16) is mandatory); we must use READ CAPACITY (10) first and then
use READ CAPACITY (16) if the READ CAPACITY (10) returns "out of range".
2006-05-19 18:54:38 +00:00
Michael Brown
d48d0fb1bb Add the concept of a "user pointer" (similar to the void __user * in
the kernel), which encapsulates the information needed to refer to an
external buffer.  Under normal operation, this can just be a void *
equivalent, but under -DKEEP_IT_REAL it would be a segoff_t equivalent.

Use this concept to avoid the need for bounce buffers in int13.c,
which reduces memory usage and opens up the possibility of using
multi-sector reads.

Extend the block-device API and the SCSI block device implementation
to support multi-sector reads.

Update iscsi.c to use user buffers.

Move the obsolete portions of realmode.h to old_realmode.h.

MS-DOS now boots an order of magnitude faster over iSCSI (~10 seconds
from power-up to C:> prompt in bochs).
2006-05-19 15:06:51 +00:00
Michael Brown
f33f01c126 Defined SCSI device interface, and added SCSI block device
implementation.
2006-05-13 11:37:50 +00:00