cropram.sh

神龙解压卡Linux下的完整开发包,绝对是超值超值超值

#!/bin/sh
echo This script helps you set/check the correct parameters to reserve
echo the top of physical memory for osdbuf and/or yuvbuf.
echo
#
if [ $UID != 0 ]; then echo Run this script as root.; exit -1; fi
#
if [ -z "$1" ]; then echo Give as first parameters how much you want to reserve in bytes.; exit -1; fi
#
BIOSRAMMAP=`grep -n "kernel: BIOS-provided physical RAM map:" /var/log/messages |tail -1 |cut -d: -f1`
if [ -z "$BIOSRAMMAP" ]; then echo Cannot parse log files: cannot proceed.; exit -1; fi
#
# has this already been run?
#
USERRAMMAP=`grep -n "Kernel command line:" /var/log/messages |grep cropram=done |tail -1 |cut -d: -f1`
if [ "$USERRAMMAP" ]; then 
 if [ $USERRAMMAP -gt $BIOSRAMMAP ]; then
  LI=`tail +$USERRAMMAP /var/log/messages |head -1`
  echo DETECTED CROPPED MEMORY.
  echo
  echo Your logs say ---$LI---
  echo
  echo Run sh insmod_osdbuf.sh or directly:
  echo
  cat insmod_osdbuf.sh
  exit 0
 fi
fi
#
echo NO TOP MEMORY IS ACTUALLY RESERVED FOR OSDBUF/YUVBUF.
echo
#
# ``mem='' parameters does not specify an absolute physical offset but the total
# amount of bytes. 
#
# Because, usually, a PC has unusable hole in the range [0x9fc00,0x100000[
# (0x60400 bytes) saying mem=Q will make linux actually use addresses up to Q+0x60400
# and ruin our plans.
#
# So: we rectify the RESERVEOFFSET. Let's be conservative: waste one meg :-(
#
HOLES=$[1024*1024]
#
LI=`tail +$[$BIOSRAMMAP+2] /var/log/messages |grep "\(usable\)"`
#
echo Your logs say ---$LI---
echo
HEXTOP=`echo $LI |cut -d: -f5 |tr '(' '-' |cut -d- -f2 |tr -d ' '`
echo PROPOSITION:
RESERVEOFFSET=$[(0x$HEXTOP-$1)/0x1000*0x1000]
HEXRESERVEOFFSET=`printf "%08x" $RESERVEOFFSET`
HEXRECTIFIEDOFFSET=`printf "%08x" $[$RESERVEOFFSET-$HOLES]`
USABLEBYTES=$[0x$HEXTOP-$RESERVEOFFSET]
echo "New kernel limit             [                 - 00000000"$HEXRESERVEOFFSET[
echo osdbuf and/or yuvbuf can use [00000000$HEXRESERVEOFFSET - $HEXTOP[ \($USABLEBYTES bytes\)
echo
# note: cropram=done is not really a boot parameter, it will be ignored by the kernel;
#       we use it to check the new command line has been taken into account.
echo LILO users: append this line to your lilo.conf paragraph for kernel `uname -r`:
echo append=\"mem=0x$HEXRECTIFIEDOFFSET cropram=done\"
echo AND RUN lilo AGAIN
echo
echo GRUB users: append this to your grub.conf paragraph for kernel `uname -r`:
echo kernel /boot/... ... ... mem=0x$HEXRECTIFIEDOFFSET cropram=done
echo
echo DO NOT INSMOD NOW! REBOOT, and run this script again.
echo
echo For osdbuf, the correct insmod line will be:
echo insmod ../realmagichwl/kernel_src/realmagichwl_kernelland_osdbuf.o osdbuf_physicaladdress=0x$HEXRESERVEOFFSET osdbuf_size=$USABLEBYTES
#
echo insmod ../realmagichwl/kernel_src/realmagichwl_kernelland_osdbuf.o osdbuf_physicaladdress=0x$HEXRESERVEOFFSET osdbuf_size=$USABLEBYTES >insmod_osdbuf.sh
echo insmod ../realmagichwl/kernel_src/realmagichwl_kernelland_yuvbuf.o yuvbuf_physicaladdress=0x$HEXRESERVEOFFSET yuvbuf_size=$USABLEBYTES >insmod_yuvbuf.sh
exit 0