cinap_lenrek
529082d34d
pc, pc64: preserve last KB of conventional memory (might contain bios tables)
...
we add new function convmemsize() that returns the size of
*usable* conventional memory that does some sanity checking
and reserves the last KB below the top of memory pointer.
this avoids lowraminit() overriding potential bios tables
and sigsearch() going off the rails looking for tables
at above 640K.
2014-11-20 19:05:43 +01:00
cinap_lenrek
d069c9b486
pc: get rid of fixed 8MB memory map (now dynamically between 4 to 16 MB depending on kernel size)
...
we now do mapping of KZERO to ROUND(end, 4*MB) where
end needs not to be above 16MB. this allows for bigger
kernels.
2014-11-15 15:21:24 +01:00
cinap_lenrek
2020190f94
pc, pc64: more sanity checking for lowraminit()
2014-11-02 00:32:46 +01:00
cinap_lenrek
cc6ab31891
pc: sanity check bda value in lowraminit() to avoid overflow with efi
2014-10-12 20:18:59 +02:00
cinap_lenrek
c24dd620f9
e820: handle duplicate and overlapping e820 entries, handle overflows
...
new algorithm:
sort entries by top address first. then for each entry we use:
base = max(base, last)
so we'll never map the same addresses twice.
2013-09-16 23:36:06 +02:00
cinap_lenrek
d436b2117e
add unified sigsearch() function to look for bios data structures
...
replace the various functions that searched for bios data structures by
a single sigsearch() one in pc/memory.c that will probe the various bios
data areas.
also, a new checksum() function was added that is to be used to validate
the structures found.
2012-08-24 15:36:56 +02:00
cinap_lenrek
7fdf820589
pckernel: use constants instead of hardcoding cpuid bits in various places
2012-08-17 04:03:51 +02:00
cinap_lenrek
cd99666815
memory.c: remove unused xmapupa map
2012-08-06 23:54:52 +02:00
cinap_lenrek
ba7374508e
e820: support new format
2012-06-21 04:57:27 +02:00
cinap_lenrek
447b37d838
e820: check for newer *e820= variable (old e820= might get removed in the future)
2012-06-21 01:55:56 +02:00
cinap_lenrek
409ed0d966
memory: e820 cleanup
2011-11-05 07:17:54 +01:00
cinap_lenrek
563437cb6d
remove realmode and e820 code from kernel
2011-11-05 06:19:52 +01:00
cinap_lenrek
0ad5929695
9boot: add e820 scan to bootloader
2011-05-14 19:20:16 +00:00
Taru Karttunen
a9060cc06b
Import sources from 2011-03-30 iso image - lib
2011-03-30 19:35:09 +03:00
Taru Karttunen
e5888a1ffd
Import sources from 2011-03-30 iso image
2011-03-30 15:46:40 +03:00
