david/ipxe
david/ipxe
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210 Commits

Author SHA1 Message Date
Michael Brown
5ec2b2c251 Cope with regions bigger than 4GB. 
We now split e820 regions around ourselves, rather than just
truncating the e820 region.  This avoids the worst-case scenario of
losing all memory over 4GB.

It's more important to get the memory map right now that we're
expecting to still be loaded when the OS starts in several situations
(e.g. Linux with UNDI driver, any OS with iSCSI/AoE boot, etc.).
 2006-05-23 23:33:37 +00:00
Michael Brown
ca2519cea3 Refactored to reduce code size; now down from 1304 to 1105 bytes. 
Tidied up debug messages; the log now contains one line per INT 13
operation, looking like

 INT 13,08 (80): Get drive parameters
 INT 13,02 (80): Read: C/H/S 0/47/14 = LBA 0xb9e <-> 1084:0000 (count 106)
 2006-05-20 15:33:32 +00:00
Michael Brown
d48d0fb1bb Add the concept of a "user pointer" (similar to the void __user * in 
the kernel), which encapsulates the information needed to refer to an
external buffer.  Under normal operation, this can just be a void *
equivalent, but under -DKEEP_IT_REAL it would be a segoff_t equivalent.

Use this concept to avoid the need for bounce buffers in int13.c,
which reduces memory usage and opens up the possibility of using
multi-sector reads.

Extend the block-device API and the SCSI block device implementation
to support multi-sector reads.

Update iscsi.c to use user buffers.

Move the obsolete portions of realmode.h to old_realmode.h.

MS-DOS now boots an order of magnitude faster over iSCSI (~10 seconds
from power-up to C:> prompt in bochs).
 2006-05-19 15:06:51 +00:00
Michael Brown
0ab92faedb Use typeof(sizeof(...)) to define a size_t. This stops gcc complaining 
about format errors for %zX arguments.
 2006-05-19 14:51:59 +00:00
Michael Brown
6b6096d28b Strip down i386 PCI configuration space I/O to the bare minimum. A 
typical build will now include 880 bytes of PCI support code, compared to
2327 bytes in Etherboot 5.4.

(There is a slight cost of around 5 extra bytes per access to a
non-constant config space address; this should be an overall win.
Driver-specific accesses will usually be to constant addresses, for
which there is no additional cost.)
 2006-05-17 01:12:11 +00:00
Michael Brown
15ee09ed10 Restructured PCI subsystem to fit the new device model. 
Generic PCI code now handles 64-bit BARs correctly when setting
"membase"; drivers should need to call pci_bar_start() only if they want
to use BARs other than the first memory or I/O BAR.

Split rarely-used PCI functions out into pciextra.c.

Core PCI code is now 662 bytes (down from 1308 bytes in Etherboot 5.4).
284 bytes of this saving comes from the pci/pciextra split.

Cosmetic changes to lots of drivers (e.g. vendor_id->vendor in order to
match the names used in Linux).
 2006-05-16 15:12:06 +00:00
Michael Brown
fcdab6299c Missed a reference to heap.h. 2006-05-16 15:01:26 +00:00
Michael Brown
295e11b2b0 Add INT 13,41 (extensions installation check). LILO's MBR now uses 
linear calls to load the MS-DOS boot sector in my test setup.
 2006-05-14 23:46:28 +00:00
Michael Brown
29fb77b0a4 Fix a couple of minor typos. 2006-05-14 18:17:29 +00:00
Michael Brown
6e42cb95bd Also capture INT 19 as a failure path, to allow for boot sectors that 
don't conform to BBS (e.g. the one created by mkdosfs).
 2006-05-14 14:13:55 +00:00
Michael Brown
4435667a00 Add int13_boot(), to allow booting from INT 13 emulated drives. 2006-05-14 13:44:47 +00:00
Michael Brown
b4f941b257 Specify attributes on .text16. 2006-05-14 13:39:27 +00:00
Michael Brown
2421723a15 Rewrote printf and friends to better support standard C semantics. 2006-05-14 02:51:55 +00:00
Michael Brown
5080668704 Provide access to rm_cs and rm_ds from protected-mode code. 2006-05-13 11:45:31 +00:00
Michael Brown
dc8d429ec6 Provide a global counter for the number of interrupts hooked. 2006-05-13 11:44:53 +00:00
Michael Brown
63499e9cfd Allow re-entrancy and provide a global counter of the number of 
interrupts hooked.
 2006-05-13 11:44:11 +00:00
Michael Brown
d822b3d4cd Define BIOS data segment in bios.h 2006-05-13 11:43:07 +00:00
Michael Brown
a27defa483 Add flag definitions. 2006-05-13 11:42:07 +00:00
Michael Brown
d2c22ec9bb Add INT 13 emulation layer (which provides an interface to gPXE block 
devices).
 2006-05-13 11:41:36 +00:00
Michael Brown
1ad72e0e79 Add 64-bit byte-swapping operations. 2006-05-13 11:40:39 +00:00
Michael Brown
1838b58c3f Add drivers/block and arch/i386/interface/pcbios 2006-05-13 11:35:29 +00:00
Michael Brown
568cad0ddc (Redoing check-in lost by SourceForge's failure.) 2006-05-13 11:30:03 +00:00
Michael Brown
847f38f4ac (Redoing check-in lost by SourceForge's failure.) 
Add method for hooking real-mode interrupt vectors.
 2006-05-13 11:19:06 +00:00
Michael Brown
f7b963da51 (Redoing check-in lost by SourceForge's failure.) 
Use .text16.data section with "aw" attributes, to avoid section type
conflicts when placing both code and data into .text16.

Add __from_{text16,data16}.
 2006-05-13 11:11:55 +00:00
Michael Brown
97d265f8dc (Redoing check-in lost by SourceForge's failure.) 
Avoid optimisation errors under -fstrict-aliasing.
 2006-05-13 11:10:24 +00:00
Michael Brown
fdb983d473 Preserve the whole of %esp across prot_call(). We have to split this 
between the low half stored in the static variable rm_sp, and the high
half stored on the prot_call() stack, because:

  Just using the stack would screw up when a prot_call()ed routine
  executes a real_call(); it would have no way to find the current top of
  the RM stack.

  Extending rm_sp to rm_esp would not be safe, because the guarantee that
  rm_sp must return to the correct value by the time an external
  real-mode call returns applies only to %sp, not to %esp.
 2006-05-06 19:44:23 +00:00
Michael Brown
f8e087767b Allow access to variables in .text16 as well as .data16. Chained 
interrupt vectors, for example, will be easiest to handle if placed in
.text16.
 2006-05-06 18:57:31 +00:00
Michael Brown
c10d1aa9d7 Preserve GDT across prot_call(). 2006-05-06 18:52:27 +00:00
Michael Brown
dcc1b0054e This line should not have been checked in 2006-05-04 23:22:42 +00:00
Michael Brown
832807726a Add infrastructure to support access to .data16 (and .text16) variables 
from protected-mode code.

Set up %ds to point to .data16 in prot_to_real, so that code specified
via REAL_EXEC() and friends can access variables in .data16.

Move most real-mode librm variables from .text16 to .data16.
 2006-05-04 23:14:06 +00:00
Michael Brown
f4429533a6 Added methods for efficiently declaring and accessing variables in 
.data16.  librm will need to supply "char *data16", i.e. the virtual
address of the start of .data16.
 2006-05-04 17:00:20 +00:00
Michael Brown
f8f75cef5b BSS is now zeroed by libprefix (along with the otherwise non-zeroable 
portions such as the stack) during the installation process.

init_fns() are called from main().  We need to think about initial
control flow some more.
 2006-05-02 21:10:45 +00:00
Michael Brown
cc23057b59 Typo 2006-05-02 21:09:29 +00:00
Michael Brown
10c28a51bd Create two easy-to-use entry points in libprefix: install and 
install_prealloc.  I *think* these will suffice for all the 16-bit
prefixes.
 2006-05-02 20:51:07 +00:00
Michael Brown
9e1dd6402d <name>_size variable is no longer needed, since we don't copy the code. 
However, it's worth adding a .size directive so that objdump reports the
correct sizes for the code fragments.
 2006-05-02 16:38:46 +00:00
Michael Brown
9fcded3d23 Towards a(nother) new real-mode infrastructure, in which we take 
advantage of the fact that we have to have a permanently-resident block
in base memory.
 2006-05-02 15:41:21 +00:00
Michael Brown
8f62b39c03 Move stack out to separate object, so that having a stack doesn't drag in 
setup.S.
 2006-05-02 14:57:48 +00:00
Michael Brown
5463169c1a Verified as working 2006-05-02 14:04:21 +00:00
Michael Brown
d081d65d48 This should be much more elegant: we use flat real mode for the 
highmem data, so decompress16 will be able to unpack blocks bigger
than 64kB.
 2006-05-01 22:35:19 +00:00
Michael Brown
cc8821a443 Checking in because I don't want to lose this rather neat code for 
running the decompresser in 16:16 protected mode using the real-mode
stack.  However, there's an even simpler way to do it...
 2006-05-01 21:26:44 +00:00
Michael Brown
9c9208a132 Put the TCP connection periodic processing in tcp.c, where it belongs. 2006-04-30 02:08:42 +00:00
Michael Brown
352bf1bda2 Move init.h to gpxe/init.h. 2006-04-30 01:08:52 +00:00
Michael Brown
d8e99bf28f Gave up on adding POSIX errno's as required, and just added (almost) all 
of them in one go.

EBADIMG has been replaced by ENOEXEC, and EIMGRET by ECANCELED.
 2006-04-28 13:44:34 +00:00
Michael Brown
7a82c3eca3 Added missing ssize_t 2006-04-25 12:55:23 +00:00
Michael Brown
832e86246b gcc is rather over-aggressive about optimising out static data structures 
even when __atribute__ (( unused )) is correctly set...
 2006-04-24 18:31:37 +00:00
Michael Brown
4c4e4de18f (librm_base-1b) is already an offset; no need to apply OFFSET(). 
Doing so, in fact, seems to expose an assembler bug; (a-b-0) is
apparently not the same as (a-b).  Go figure.
 2006-04-24 18:29:47 +00:00
Michael Brown
824d6ffa7f Header rearrangement. 
I want to get to the point where any header in include/ reflects a
standard user-level header (e.g. a POSIX header), while everything that's
specific to gPXE lives in include/gpxe/.  Headers that reflect a Linux
header (e.g. if_ether.h) should also be in include/gpxe/, with the same
name as the Linux header and, preferably, the same names used for the
definitions.
 2006-04-24 15:42:49 +00:00
Michael Brown
510ccb2900 Added __constant_memcpy() based on version in Linux's string.h. 
Added memswap().
 2006-04-24 15:25:25 +00:00
Michael Brown
b2909e547d They can come back when they have someone to support them. 2006-03-17 14:13:09 +00:00
Michael Brown
cdf1511d3e Prefix semantics have changed 2006-03-16 19:28:38 +00:00
Michael Brown
7e0a7a2e08 Merge from Etherboot 5.4 2006-03-16 18:30:54 +00:00
Michael Brown
9b18017296 Merge from Etherboot 5.4 2006-03-16 18:15:48 +00:00
Michael Brown
bb7394b041 Merge from Etherboot 5.4 2006-03-16 17:59:51 +00:00
Michael Brown
5d28bae0f1 Fix up building with gcc 4.0.1 / gas 2.16.91 2006-01-17 01:47:41 +00:00
Michael Brown
0e494614b5 Some versions of doxygen seem to object to "@ret None" or similar. 2005-05-24 00:11:25 +00:00
Michael Brown
7b423c0988 Fixes for gcc >= 3.2 from Georg Baum 2005-05-23 23:47:54 +00:00
Michael Brown
809933d9f7 Split PXE code into preboot, udp, tftp, undi and loader units. 
PXE code now compiles without errors (though it won't actually work).
 2005-05-23 23:32:56 +00:00
Michael Brown
079b5d5527 Moved pxe_loader.c to pxe_image.c to avoid name clash 2005-05-23 23:05:45 +00:00
Michael Brown
8becf0f65f Rearranging PXE header files 2005-05-23 22:45:48 +00:00
Michael Brown
d5789ff4a2 Doxygenation 2005-05-20 11:28:27 +00:00
Michael Brown
d3dec7c331 Update to cope with changes in registers.h 2005-05-20 11:23:51 +00:00
Michael Brown
5231b858c9 Don't use anonymous entries in a struct; it seems to aggravate gcc 3.4.3. 2005-05-20 11:22:09 +00:00
Michael Brown
4e87543c74 Synced across updates from Etherboot 5.4 tree 2005-05-19 16:47:19 +00:00
Michael Brown
d0c9183903 Doxygenation 2005-05-19 14:51:37 +00:00
Michael Brown
dd475a9b8c Add a const to avoid a warning 2005-05-19 13:02:38 +00:00
Michael Brown
783e9ca396 Added doxygen comments and errno values. 2005-05-18 13:22:45 +00:00
Michael Brown
fac5f28d7e There is no arch/i386/firmware/linuxbios directory 2005-05-18 11:11:57 +00:00
Michael Brown
205a7ad5e0 Moved NBI support to nbi.c, modified to work with new load mechanism 2005-05-17 13:42:20 +00:00
Michael Brown
9c832a6a69 First version 2005-05-17 13:41:00 +00:00
Michael Brown
9a413cfea1 Moved os_regs into start32.S 2005-05-17 13:37:01 +00:00
Michael Brown
a76b9c3f19 Added debug messages 2005-05-17 13:36:12 +00:00
Michael Brown
479fb900a1 Added copy_phys_to_phys 2005-05-17 13:34:57 +00:00
Michael Brown
4f27994980 Added "image" directory 2005-05-17 13:34:25 +00:00
Michael Brown
3bbf5f28a3 Use __unused instead of __used for static data structures. 
Remove compiler.h defines from osdep.h
 2005-05-17 12:16:28 +00:00
Michael Brown
301b2d40f0 Use the heap functions to allocate a load buffer. 2005-05-13 13:30:51 +00:00
Michael Brown
b94def2088 Include string.h, because we need to define copy_{to,from}_phys 2005-05-09 18:03:14 +00:00
Michael Brown
9fc97f8513 First version 2005-05-09 18:02:22 +00:00
Michael Brown
116f17f605 off_t should be signed. 2005-05-09 14:26:25 +00:00
Michael Brown
e3f2aa7b4d Add off_t and physaddr_t, and the copy_{to,from}_phys helper routines. 2005-05-09 13:21:56 +00:00
Michael Brown
dc0aa58fb2 Add memcpy 2005-05-09 12:48:00 +00:00
Michael Brown
ff8e46f2f3 #if 0 out the whole file for now; it cannot be linked because the base 
memory interface has changed.
 2005-05-03 11:56:33 +00:00
Michael Brown
282b6f1a1a isa.c uses the new table infrastructure. 2005-04-27 12:24:38 +00:00
Michael Brown
f37e0a06d7 dev.c uses the new tables infrastructure. 2005-04-27 12:20:54 +00:00
Michael Brown
c08671e5fc Missing include 2005-04-27 12:17:09 +00:00
Michael Brown
b9e72856b6 Post-relocation functions use the generic table mechanism. 2005-04-27 12:10:24 +00:00
Michael Brown
3e5bf5fb06 console.c uses the generic table mechanism 2005-04-27 11:38:43 +00:00
Michael Brown
3dbdeb588f ISA bus driver updated to report devices as present only if a driver 
thinks they are.
Other bus drivers modified for consistency.
 2005-04-26 12:30:14 +00:00
Michael Brown
3a7967a38a PCI_DRIVER changed 2005-04-26 12:20:05 +00:00
Michael Brown
fcee25024f BIOS floppy handling code moved to where it will really live. 2005-04-25 19:29:55 +00:00
Michael Brown
10b7b1a61f Added arch/i386/drivers/disk 2005-04-25 19:29:02 +00:00
Michael Brown
5bace628ae Added "name" field to bus structure. 2005-04-25 18:54:15 +00:00
Michael Brown
698f86f25a Prevent hundreds of errors from "make symcheck". The prefix exit path 
mechanism has changed anyway, and so must be rewritten, but at least doing
this makes the output of "make symcheck" more legible.
 2005-04-23 14:57:53 +00:00
Michael Brown
dbea213c27 Coerced into compiling. 2005-04-22 16:40:10 +00:00
Michael Brown
84f43ea9cf isapnp_read_port can be set directly, rather than via a function call. 2005-04-22 16:03:25 +00:00
Michael Brown
98ff29345e Created a bus/device API that allows for the ROM prefix to specify an 
initial device, and will also allow for e.g. a device menu to be presented
to the user.
 2005-04-21 18:18:29 +00:00
Michael Brown
e74bbaeca0 First versions 2005-04-19 14:17:42 +00:00
Michael Brown
2c7d72e11e Moved floppy.c to i386 arch, since it's i386-specific. 2005-04-18 18:56:18 +00:00
Michael Brown
e3bb65c17f Added remaining bus functions. 2005-04-18 18:54:27 +00:00
Michael Brown
7af89ccf33 Code fixed to operate correctly. 2005-04-18 15:48:20 +00:00
Michael Brown
400fd74897 Extracted from firmware/pcbios/bios.c 2005-04-18 15:39:02 +00:00