diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2020-12-05 16:57:12 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2020-12-05 16:57:12 +0100 |
| commit | 99696c414ac1011a59aa4aeb03976c45b1d70856 (patch) | |
| tree | 441a03e5e8912aa12fc9aee524a948b102f7f0dc /sys/src/9/pc64 | |
| parent | 4ca5e1b3a33d49d0904b39477149517665a78d8a (diff) | |
pc, pc64: exclude memory regions with unusual MTRR cache attributes
Use the MTRR registers to exclude memory ranges that
do not have the expected cache attributes:
RAM -> writeback
UMB -> uncached
UPA -> uncached
Diffstat (limited to 'sys/src/9/pc64')
| -rw-r--r-- | sys/src/9/pc64/fns.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/src/9/pc64/fns.h b/sys/src/9/pc64/fns.h index 5afd1c0b1..ad5315b5e 100644 --- a/sys/src/9/pc64/fns.h +++ b/sys/src/9/pc64/fns.h @@ -99,6 +99,7 @@ void mfence(void); void mmuinit(void); uintptr *mmuwalk(uintptr*, uintptr, int, int); char* mtrr(uvlong, uvlong, char *); +char* mtrrattr(uvlong, uvlong *); void mtrrclock(void); int mtrrprint(char *, long); void mtrrsync(void); |