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445 Commits (2cfe0dee1f8960937a9049e10e91d8c70def546e)

Author SHA1 Message Date
Michael Brown 2cfe0dee1f Don't trash the %ecx value returned by relocate(). This was causing 
us to round down the size for the relocation copy to the nearest 64kB
(+0x10 bytes); this just happened to work on most machines because the
last 64kB of the image is all-zeroes anyway (it's the .bss).
 2007-07-19 16:07:31 +01:00
Michael Brown a8111e8ab7 Remove INT 13,4b handler; it represents an incomplete feature (CD-ROM 
emulation support) for an unknown purpose, and breaks grub.
 2007-07-19 11:16:05 +01:00
Michael Brown 0d9d2ccbae Completed definition of struct int13_cdrom_specification, and moved to 
int13.h.
 2007-07-19 11:15:01 +01:00
Michael Brown 013d381e3c Real-mode code might set the direction flag, which would cause carnage. 2007-07-17 13:46:37 +01:00
Michael Brown c94cdf2b7d Move .zinfo to libprefix.S; it doesn't belong with the decompression code. 2007-07-17 12:52:54 +01:00
Michael Brown dc52db4920 Removed dead code identified by symcheck 2007-07-17 01:43:19 +01:00
Michael Brown 38dbe14bbe Kill off redundant references to the .zprefixes. 2007-07-16 17:26:07 +01:00
Michael Brown 84551d485e Update all prefixes currently referring to _load_size to include a 
compressor fixup section.
 2007-07-16 17:17:26 +01:00
Michael Brown 0929142a15 Rename _rom_size to _load_size_sect, since hdprefix.S also uses it. 2007-07-16 17:03:19 +01:00
Michael Brown 048bbeeebc Compressed ROM images now work. 2007-07-16 16:58:38 +01:00
Michael Brown 6d2e4e719c Move uninitialised .data16 variables to .bss16; saves around 2000 
bytes of useless zeroes in the final image.
 2007-07-16 13:22:12 +01:00
Michael Brown 389204713f Kill off some long-redundant CFLAGS 2007-07-16 13:15:12 +01:00
Michael Brown 833d6cc8ec Add __bss16() macro, and allow use of .bss16 section by removing 
link-time check for section overlaps.  (In order to avoid wasting
space in the executable image, .bss16 will overlap with the following
section, which is .text).
 2007-07-16 13:10:49 +01:00
Michael Brown ab859a5355 Use a single _payload_offset linker-defined variable to locate the 
start of the non-prefix blocks in the loaded image, and rely on the
image ordering.  This should make introducing compression much easier.
 2007-07-15 02:52:02 +01:00
Michael Brown 0b5059c40b Skip the length field prepended by util/nrv2b.c 2007-07-15 02:01:17 +01:00
Michael Brown b37e267d1b Modified calling convention: we now update %esi and %edi just like a 
"rep movsb".
 2007-07-15 01:51:32 +01:00
Michael Brown 3feac9465e "not" doesn't affect flags, "xor $-1" does. 2007-07-15 01:25:13 +01:00
Michael Brown 26473105cd On advice of hpa: be more patient with the KBC and SCPA methods; retry 
in a long loop before giving up on them.  Record method which worked
and default to that method on next attempt.
 2007-07-14 20:56:12 +01:00
Michael Brown adf192f566 Shrink cpu.c and render it useful for our purposes. 2007-07-14 19:12:13 +01:00
Michael Brown e330db3c74 Dead code removal. 
Kill off use of etherboot.h outside drivers/net.
 2007-07-14 15:42:26 +01:00
Michael Brown 95c07736cb Be more aggressive in attempts to enable A20, now that we have the 
optimisation of only trying to do so when necessary.
 2007-07-14 14:21:18 +01:00
Michael Brown 8624fdc445 Kill off the enforced RX quota; it only seems to hurt on real hardware. 2007-07-14 00:30:11 +01:00
Michael Brown 57b5e227ff Use fast in-situ test for gate A20 being set, to cut down on the 
number of (potentially very slow) gateA20_set operations.

Die with a fatal error if we are unable to set gate A20; if this fails
then we are bound to experience memory corruption at a later stage,
and I'd prefer to pick it up early.
 2007-07-13 13:32:49 +01:00
Michael Brown 2ac7694c3e Improve error reporting for strange length combinations reported by 
the UNDI stack.

Ignore obviously invalid length combinations (as returned by
e.g. VMWare's PXE stack).

Limit to one packet per poll to avoid memory exhaustion.
 2007-07-10 20:59:21 +01:00
Michael Brown efd322091d Set up %ds *before* testing a value in our data segment (d'oh!). 
Always send EOI; do not chain to BIOS's default interrupt handler.
They are just too unpredictable; at least VMware's seems to kill the
machine if you go anywhere near it.

Disable interrupts after return from PXENV_UNDI_ISR, just in case some
dumb PXE stack enables them.
 2007-07-10 17:08:32 +01:00
Michael Brown f6f9a3098d Report RX errors via netdev_rx_err() 2007-07-10 17:01:18 +01:00
Michael Brown fb16f90699 Dump first 64 bytes of chained ISR when debugging is enabled. 2007-07-10 16:57:55 +01:00
Michael Brown edc4648c39 Protect ISR against failure to unhook. 2007-07-10 04:34:53 +01:00
Michael Brown 4e14b020a5 Master IRQ should be EOIed first, I think. 2007-07-10 04:33:59 +01:00
Michael Brown 19871cbb96 We probably ought not to call INT13 with interrupts disabled. 2007-07-10 04:32:30 +01:00
Michael Brown 027fed72c1 Working code to call the PXE stack from within the ISR. 2007-07-10 04:21:24 +01:00
Michael Brown cd7e296cbe Always increase number of BIOS drives when registering 2007-07-09 20:42:04 +01:00
Michael Brown b90d321dfb Change %dl fixup rules for INT13: 
INT 13,08 : read number of drives from 40:75
INT 13,15 : do nothing
all others : restore original value of %dl
 2007-07-09 20:37:39 +01:00
Michael Brown c7d9fdb5b9 Proof of concept; works, but has several hard-coded hacks. 2007-07-09 20:28:40 +01:00
Michael Brown 8bce52d348 Set CF by default, clear on success (rather than clearing and setting 
on failure).
 2007-07-09 19:02:41 +01:00
Holger Lubitz 4ff85d9f15 Add -mpreferred-stack-boundary=2 to i386 CFLAGS as it's almost always a win. 2007-07-09 03:32:54 +01:00
Michael Brown 4c418d2100 Use net_device_operations structure and netdev_nullify() to allow for 
safe dropping of the netdev ref by the driver while other refs still
exist.

Add netdev_irq() method.  Net device open()/close() methods should no
longer enable or disable IRQs.

Remove rx_quota; it wasn't used anywhere and added too much complexity
to implementing correct interrupt-masking behaviour in pxe_undi.c.
 2007-07-07 16:43:39 +01:00
Holger Lubitz c7549bcebe convert to zalloc 2007-07-06 20:19:06 +02:00
Holger Lubitz bb61774ee4 convert to zalloc 2007-07-06 20:19:06 +02:00
Michael Brown 311637503d Merge branch 'master' of rom.etherboot.org:/pub/scm/gpxe 2007-07-06 13:31:58 +01:00
Michael Brown f660e8ef58 Add strlen_user() (will be needed for PXE API extensions) 2007-07-06 13:07:10 +01:00
Marty Connor 74a1c77820 Merge branch 'master' of /pub/scm/gpxe 2007-07-06 08:04:55 -04:00
Marty Connor 28d8d828b3 Rename .lilo extension to .lkrn and updated dependencies 2007-07-06 08:04:06 -04:00
Michael Brown 763a3eab8a Add .pdsk target (padded .dsk, suitable for qemu). 2007-07-05 23:37:17 +01:00
Michael Brown fbda4837b0 Allocate heap at first usage, rather than assuming we can fit it in 
below _text.  This should help with the gPXE-on-gPXE-via-PXE case.
 2007-07-05 22:30:34 +01:00
Michael Brown 07ea125213 Use partition type 0xeb ("EtherBoot"), to avoid any attempts to mount 
the Etherboot partition.
 2007-07-05 14:20:55 +01:00
Michael Brown 6e082c9b81 Add .usb target 2007-07-05 14:15:43 +01:00
Michael Brown a0f078d7f5 Working with multi-sector reads 2007-07-05 13:30:49 +01:00
Michael Brown 66208dd65d hdprefix that works for LBA only 2007-07-05 12:58:16 +01:00
Michael Brown 839960276d Miscellaneous efficiency improvements, and extend read_sectors to 
handle multiple sectors.
 2007-07-05 12:36:39 +01:00