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02cf755f3f
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67 Commits

Author SHA1 Message Date
Michael Brown
02cf755f3f Removed REAL_EXEC(); there is no longer any code using it. 2006-05-24 14:10:15 +00:00
Michael Brown
103aff3ae2 Added potentially required "\n\t" on the end of asm_code_str 2006-05-24 14:06:28 +00:00
Michael Brown
7a53d07027 Split out REAL_CODE() from REAL_EXEC(), preparatory to removing REAL_EXEC 
completely.
 2006-05-24 09:51:04 +00:00
Michael Brown
83d80d9e79 Remove references to obsoleted REAL_CALL from documentation. 2006-05-24 09:16:48 +00:00
Michael Brown
3b525385af Removed REAL_FRAGMENT and REAL_CALL, and left just REAL_EXEC (which is 
the only one we actually use).  This allows REAL_EXEC fragments to
contain proper references to constraints (e.g. "%w0"), rather than having
to force the use of specific registers.

Note that the "num_constraints" parameter is now completely obsolete, and
that we can probably reduce the syntax to something like
  __asm__ __volatile__ ( REAL_CODE ( "asm statements" )
                         : output constraints
                         : input constraints
                         : clobber );
which would look much more natural, and avoid the need to always specify
a clobber list.


Add userptr_t to libkir.h, to allow it to at least compile.
 2006-05-24 09:14:44 +00:00
Michael Brown
77a65075a6 Replaced memsizes.c with smaller memmap.c, taking advantage of __data16, 
and creating a memory map that's easier to work with than the E820 map.
 2006-05-24 01:37:46 +00:00
Michael Brown
897313007b Add __{text,data}16_array, since there's no way I can see to make the 
usual __{text,data}16 trick work with arrays.  gcc seems to accept the
__asm__ ( asmlabel ) only after the [] of the array declaration, not
before.
 2006-05-23 23:42:45 +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
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
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
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
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
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
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
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
9c9208a132 Put the TCP connection periodic processing in tcp.c, where it belongs. 2006-04-30 02:08:42 +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
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
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
8becf0f65f Rearranging PXE header files 2005-05-23 22:45:48 +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
9c832a6a69 First version 2005-05-17 13:41:00 +00:00
Michael Brown
479fb900a1 Added copy_phys_to_phys 2005-05-17 13:34:57 +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
b94def2088 Include string.h, because we need to define copy_{to,from}_phys 2005-05-09 18:03:14 +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
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