Date: Fri, 4 Jun 1999 11:13:16 -0400 From: bush doctor <dervish@bantu.cl.msu.edu> To: current@freebsd.org Subject: What is MTRR all about??? Message-ID: <19990604111316.A2066@bantu.cl.msu.edu>
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After reading /sys/boot/README, I decided to sync up my -current boxes.
I began playing around with loader, kld's and the splash screens. Now I
have a few queries ... #;^)
From dmesg on my -current box:
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 4.0-CURRENT #19: Thu Jun 3 13:54:15 EDT 1999
root@bantu.cl.msu.edu:/usr/src/sys/compile/BANTU
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 232672182 Hz
CPU: Pentium Pro (232.67-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x616 Stepping=6
Features=0xf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV>
real memory = 134217728 (131072K bytes)
sio0: system console
avail memory = 127488000 (124500K bytes)
Preloaded elf kernel "kernel" at 0xc02ff000.
Preloaded elf module "splash_bmp.ko" at 0xc02ff09c.
Preloaded splash_image_data "/boot/logo-31.bmp" at 0xc02ff140.
Preloaded elf module "cd9660.ko" at 0xc02ff190.
Preloaded elf module "kernfs.ko" at 0xc02ff230.
Preloaded elf module "msdos.ko" at 0xc02ff2d0.
Preloaded elf module "procfs.ko" at 0xc02ff370.
Pentium Pro MTRR support enabled, default memory type is uncacheable
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
What is MTRR? Using the web based cross referencing tool I came up with the
following:
234 #define NPPROVMTRR 8
235 #define PPRO_VMTRRphysBase0 0x200
236 #define PPRO_VMTRRphysMask0 0x201
237 struct ppro_vmtrr {
238 u_int64_t base, mask;
239 };
240 extern struct ppro_vmtrr PPro_vmtrr[NPPROVMTRR];
Could someone elaborate on the definitions?
thanxs in advance ...
#;^)
--
So ya want ta here da roots?
Dem that feels it knows it ...
bush doctor <dervish@bantu.cl.msu.edu>
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