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The patch taken from the linux-mips mailing list. The Kernel hangs occasionally during boot after "Calibrating delay loop..". This is caused by the c0_compare_int_usable() routine in cevt-r4k.c returning false which causes the system to disable the timer and hang later. The false return happens because the routine is using a series of four calls to irq_disable_hazard() as a delay while it waits for the timer changes to propagate to the cp0 cause register. On newer MIPS cores, like the 74K, the series of irq_disable_hazard() calls turn into ehb instructions and can take as little as a few clock ticks for all 4 instructions. This is not enough of a delay, so the routine thinks the timer is not working. This fix uses up to a max number of cycle counter ticks for the delay and uses back_to_back_c0_hazard() instead of irq_disable_hazard() to handle the hazard condition between cp0 writes and cp0 reads. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29009 3c298f89-4303-0410-b956-a3cf2f4a3e73
This is the buildsystem for the OpenWrt Linux distribution Please use "make menuconfig" to configure your appreciated configuration for the toolchain and firmware. You need to have installed gcc, binutils, patch, bzip2, flex, make, gettext, pkg-config, unzip, libz-dev and libc headers. Simply running 'make' will build your firmware. It will download all sources, build the cross-compile toolchain, the kernel and all choosen applications. You can use scripts/flashing/flash.sh for remotely updating your embedded system via tftp. The OpenWrt system is documented in docs/. You will need a LaTeX distribution and the tex4ht package to build the documentation. Type make -C docs/ to build it. Building your own firmware you need to have access to a Linux, BSD or MacOSX system. Cygwin will not be supported because of the lack of case sensitiveness. Sunshine! Your OpenWrt Project http://openwrt.org