K 10
svn:author
V 6
tsoome
K 8
svn:date
V 27
2018-12-30T09:35:47.290155Z
K 7
svn:log
V 338
loader: create bio_alloc and bio_free for bios bounce buffer

We do have 16KB buffer space defined in pxe.c, move it to bio.c and implement
bio_alloc()/bio_free() interface to make it possible to use this space for
other BIOS calls (notably, from biosdisk.c).

MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D17131

END