Make the maxtransfer per device, as it should be; properly imported
from the head loader (in case it is patched with -s).  Also enforce
capping to 127 for EBIOS and 63 for CBIOS.  This is structured so that
once EDD4 is approved we can remove the capping for that particular
subcase.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Do the actual idling in protected mode.  This both allows PM code a
more efficient interface, but also handles bugs in HVM implementations
which don't handle HLT in real mode.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Replace enum inode_mode with the equivalent enum dirent_type.

No point in zeroing out the disk cache and the heap.  Put those in a
.hugebss section which we align, but don't zero.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Use an inode structure for PXE as well.  Even though this is really
rather superfluous in the case of PXE, it eliminates an ugly special
case in the generic code.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

- Avoid a completely unnecessary malloc/free pair by passing a pointer
  to the filesystem driver;
- Make sure d_reclen is always set correctly;
- Make sure the d_type field is set correctly.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Add 32-bit API calls for open file and close file.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

The 16-bit API to opendir/readdir/closedir was confused, had a memory
leak, and was incompatible with Syslinux 3.x anyway.  Replace it with
a pure 32-bit API.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

(Missing from previous checkin)

Add simplified toupper(), tolower() and str[n]casecmp()
implementations to the core, good enough for ASCII e.g. for use in URL
parsing, or in config file decoding.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Add a no_next_extent() dummy function for filesystems (like iso9660)
which should never end up calling next_extent (because there is only
one extent...)

Signed-off-by: H. Peter Anvin <hpa@zytor.com>