Andrew Cooper 413a6fb4ee rombios/ata: Do not wait for BSY to be set ...

After issuing a reset, the BSY bit is expected to be set.  This is not the
case for Qemu.

In SeaBIOS.git: 580e33293244fee4556e56ecc67b8bd877f3c496

this check was even replaced with a udelay(5), as enough real hardware ignored
the BSY bit as well.

As rombios does not have an equivalent udelay(), replace the wait with a write
to port 0x80 which is whitelisted by Xen for 'a small delay'.

This causes 42k fewer IO traps to Qemu.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Keir Fraser <keir@xen.org>

2013-08-08 12:03:12 +01:00

..

etherboot

autoconf: check for wget and ftp

2012-10-30 18:11:02 +00:00

hvmloader

Revert "hvmloader: always include HPET table"

2013-07-08 13:20:20 +02:00

rombios

rombios/ata: Do not wait for BSY to be set

2013-08-08 12:03:12 +01:00

vgabios

vgabios: Make Windows 8 support greater resolutions

2012-05-07 13:39:27 +01:00

Makefile

tools/firmware: pass PYTHON as an env var to sub-makes in this subtree

2012-04-25 11:21:25 +01:00

ovmf-makefile

tools/firmware: Fix ovmf build with gcc version different from 4.4

2013-03-25 12:37:03 +00:00

Rules.mk

tools: pass EXTRA_CFLAGS via environment

2012-06-07 18:51:42 +01:00

seabios-config

tools: Update to SeaBIOS 1.7.1

2013-01-17 13:53:14 +00:00