Seems it can't do DMA updates of the rxsts for mbufs with addresses
>= 256MB. It can't also seem to properly read from the descriptor rings
if they are < 256MB. And I have no idea why either should matter.
Written by isaki@ back in 2003 based on x86's NE2000 netboot, and
misc debug and improvements by tsutsui@ and Y.Sugahara.
Tested on XM6i (emulating Nereid Ethernet) and X68030 + Neptune-X by me,
also on X68030 + Nereid and X68000 PRO-II + Xellent30 + Nereid by isaki@.
Note:
- X680x0 IPLROM doesn't support bootstrap from Neptune-X or Nereid,
so this network bootloader needs to be loaded from floppy or harddisk.
- Currently netboot support is not merged into the secondary Multi-boot
(/usr/mdec/boot) due to size restriction.
- Primary loaders assumes that the secondary bootloader name is /boot,
so /usr/mdec/netboot needs to be installed as /boot into the target
bootstrap device.
It didn't clear input key data when non ASCII keys (CTRL, OPT.1 etc)
were pressed so it couldn't detect further key inputs and
"any other key for boot menu" interrupt during boot didn't work
in that case.
The problem was tracked by Y.Sugahara,
and tested on X68030 and XM6i by me.
is fragmented or not, so define new MVGBE_RX_IP_FRAGMENT with the same
value and use it.
- Remove the checking whether a packet length is lower than 72 octet.
This check is not used in Linux and FreeBSD. Tested with me (for Kirkwood)
and Kiyohara (for DiscoveryII).
Elide the fs-wide rename lock for single-directory renames. This
required changing the order of lookups, so that we know what the
directories are before we lock the nodes.
Clean up error branches, explain why various nonsense happens and
what it does and doesn't do, and note some of what needs to change.
for a register that is used with the "xchgb" instruction in the
definition of __cpu_simple_lock_try(). This fixes PR 45673, or at
least works around the gcc bug that might be behind PR 45673.
The output from "objdump -d" before and after this change is
identical, for the amd64 GENERIC kernel, the i386 GENERIC kernel,
and the i386 MONOLITHIC kernel.
edit from me.
The TX buffer size is not a function of the SEEQ chip, it is an arbitrary
driver threshold, so I've renamed the define accordingly and added a new
one to specify how many buffers are used (in my port I allow multiple
packets to be in flight at once, so have used #ifndef, such that the
makefile can override).
Comment corrected, and make use of the above defines.
Missing delay(1) added, otherwise the 20,000 timeout loop is dependent
on the speed of your processor. Matches ea_stoptx logic now.
The FIFO empty check does nothing if the previous mode was 'read', but is
required before changing the BUFCODE (per 80C04 datasheet page 19,
note [2]). Then the mode is set to write, so a second FIFO empty check is
needed incase the previous mode was read.
Treat m0 as a pointer not an integer.
Remove double write of the NULL packet header. Either do
memset/ea_writebuf or two writes to SEEQ_BUFWIN, but not both.
The calculation of nextpacket (for hdr[]) assumes bufstart = 0, and puts
the packet header pointing in the wrong place when it isn't.
The setting of CFG2_OUTPUT is done in ea_init(), so doing it in ea_rxinit
is duplicated code.
