On 07:24 Wed 17 Dec , Jens Gehrlein wrote: > Dear Jean-Christophe, > > Jean-Christophe PLAGNIOL-VILLARD schrieb: >> On 17:46 Tue 16 Dec , Jens Gehrlein wrote: >>> Jean-Christophe PLAGNIOL-VILLARD schrieb: >>>> On 17:25 Tue 16 Dec , Jens Gehrlein wrote: >>>>> Hi list, >>>>> >>>>> The following patches should increase the performance of the CFI driver, >>>>> particularly with regard to single word programming mode. >>>>> >>>>> I tested it on TQM5200S with NOR-Flash Samsung K8P2815UQB, which has no >>>>> write buffer. At least no write buffer, that could be programmed using >>>>> standard commands. >>>>> >>>>> Performance increase on this TQM is about factor 2.6 (37 KiB/s -> 95 >>>>> KiB/s). >>>>> On the same module with Spansion S29GL128N (with write buffer) it is about >>>>> factor 1.2 (455 KiB/s -> 585 KiB/s). >>>>> >>>>> TQM5200 is a bottom boot module with 2x16 Bit Flash connection. Could >>>>> someone >>>>> test the patches on other HW, particularly top boot, other CPU, other >>>>> flash >>>>> width, please? >>>> Could you try it against the qemu SVN HEAD >>> ??? Sorry, what is qemu SVN HEAD ??? >>> >> In qemu you have 2 boards emulated with u-boot support qemu_mips and SX1 > > Now, I understand, what you meant. > >> >> it'll be nice to test them also >> >> please note they are only in the SVN tree of qemu > > Because I'm neither familiar with qemu nor with svn I can't do that > with little effort (installation, familiarization, etc.). Beside that, > how could a virtual machine simulate the real bus access with it's > bus timing? If I'm right in this point, only testing on another > architecture is possible, but no performance test. It's simple to use I've write a doc about the qemu_mips usage in doc/README.qemu_mips
and I've resend doc update yesterday to the ML for the SX1 it's nearly the same as the qemu_mips but the cmdline to start qemu will be dd of=SX1/flash bs=1k count=32k if=/dev/zero dd of=SX1/flash bs=1k conv=notrunc if=SX1/u-boot.bin /opt/qemu/bin/qemu-system-arm -M sx1 -monitor pty -nographic -m 98 -pflash SX1/flash and the tree to use the SX1 is u-boot-arm/next with make SX1_stdout_serial_config Best Regards, J. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot