Michael Brown
8b20e5d2b7
[pcbios] Sanity-check the INT15,e820 and INT15,e801 memory maps
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Some systems seem to report insane memory maps (particularly at POST
time). Detect and work around some of the common failure cases.
2008-09-23 23:35:19 +01:00
Michael Brown
0fd1e54026
[memmap] Allow for 4GB+ systems in debug message
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INT 15,e801 is capable of returning a memory range that extends to
4GB, so allow for this in the debug message that shows the data
returned by INT 15,e801.
2008-09-23 00:58:12 +01:00
Michael Brown
18aa0e79d2
[pcbios] Add extra debugging messages relating to the system memory map
2008-09-07 21:38:41 +01:00
Michael Brown
4fbbf651d7
[i386] Change semantics of __from_data16 and __from_text16
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__from_data16 and __from_text16 now take a pointer to a
.data16/.text16 variable, and return the real-mode offset within the
appropriate segment. This matches the use case for every occurrence
of these macros, and prevents potential future bugs such as that fixed
in commit d51d80f
2008-06-30 18:52:13 -07:00
Michael Brown
a7eee64506
Added more verbose memory-map debugging.
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Added redundant call to get_memmap() in int13_boot() immediately
before jumping to boot sector, to assist in debugging.
2007-09-21 18:33:17 +01:00
Michael Brown
6d2e4e719c
Move uninitialised .data16 variables to .bss16; saves around 2000
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bytes of useless zeroes in the final image.
2007-07-16 13:22:12 +01:00
Michael Brown
b9f99858ab
Make the getmemsize() prototype available in memsizes.h, for code that
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doesn't want to go to the hassle of processing a full memory map.
2007-01-14 15:32:25 +00:00
Michael Brown
c980cdd0aa
Move memmap.h out of arch/i386; it no longer contains anything
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architecture-dependent and is needed by the ELF code.
2007-01-11 14:08:44 +00:00
Michael Brown
88e38fa148
We don't actually have a stdio.h header file. Our printf() functions are
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defined in vsprintf.h. (This may change, since vsprintf.h is a
non-standard name, but for now it's the one to use.)
There should be no need to include vsprintf.h just for DBG() statements,
since include/compiler.h forces it in for a debug build anyway.
2006-09-27 10:58:14 +00:00
Marty Connor
6ac78f6aff
added stdio.h to includes for DBG compilation
2006-09-27 05:57:06 +00:00
Michael Brown
e4f8d6eed7
Add a "count" field to struct memory_map.
2006-05-25 00:00:30 +00:00
Michael Brown
986f6ffff1
Define a struct memory_map with a fixed number of entries, rather than
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requiring each caller to decide how many entries it wants to permit.
2006-05-24 14:41:27 +00:00
Michael Brown
04d6005d77
Update to REAL_CODE()
2006-05-24 12:45:50 +00:00
Michael Brown
53935e9dc6
Set carry flag before calling INT 15,e801 and INT 15,e820.
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Ignore carry flag for INT 15,88; the Ralf Brown interrupt list says
that CF is unreliable for this call.
2006-05-24 12:19:16 +00:00
Michael Brown
77a65075a6
Replaced memsizes.c with smaller memmap.c, taking advantage of __data16,
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and creating a memory map that's easier to work with than the E820 map.
2006-05-24 01:37:46 +00:00
