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i8042.h

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  • Forked from Reform / reform-boundary-uboot
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    • Wolfgang Denk's avatar
      7a8e9bed
      * Patch by Marc Singer, 29 May 2003: · 7a8e9bed
      Wolfgang Denk authored
        Fixed rarp boot method for IA32 and other little-endian CPUs.
      
      * Patch by Marc Singer, 28 May 2003:
        Added port I/O commands.
      
      * Patch by Matthew McClintock, 28 May 2003
        - cpu/mpc824x/start.S: fix relocation code when booting from RAM
        - minor patches for utx8245
      
      * Patch by Daniel Engström, 28 May 2003:
        x86 update
      
      * Patch by Dave Ellis, 9 May 2003 + 27 May 2003:
        add nand flash support to SXNI855T configuration
        fix/extend nand flash support:
        - fix 'nand erase' command so does not erase bad blocks
        - fix 'nand write' command so does not write to bad blocks
        - fix nand_probe() so handles no flash detected properly
        - add doc/README.nand
        - add .jffs2 and .oob options to nand read/write
        - add 'nand bad' command to list bad blocks
        - add 'clean' option to 'nand erase' to write JFFS2 clean markers
        - make NAND read/write faster
      
      * Patch by Rune Torgersen, 23 May 2003:
        Update for MPC8266ADS board
      7a8e9bed
      History
      * Patch by Marc Singer, 29 May 2003:
      Wolfgang Denk authored
        Fixed rarp boot method for IA32 and other little-endian CPUs.
      
      * Patch by Marc Singer, 28 May 2003:
        Added port I/O commands.
      
      * Patch by Matthew McClintock, 28 May 2003
        - cpu/mpc824x/start.S: fix relocation code when booting from RAM
        - minor patches for utx8245
      
      * Patch by Daniel Engström, 28 May 2003:
        x86 update
      
      * Patch by Dave Ellis, 9 May 2003 + 27 May 2003:
        add nand flash support to SXNI855T configuration
        fix/extend nand flash support:
        - fix 'nand erase' command so does not erase bad blocks
        - fix 'nand write' command so does not write to bad blocks
        - fix nand_probe() so handles no flash detected properly
        - add doc/README.nand
        - add .jffs2 and .oob options to nand read/write
        - add 'nand bad' command to list bad blocks
        - add 'clean' option to 'nand erase' to write JFFS2 clean markers
        - make NAND read/write faster
      
      * Patch by Rune Torgersen, 23 May 2003:
        Update for MPC8266ADS board
    README.440-DDR-performance 3.84 KiB
    AMCC suggested to set the PMU bit to 0 for best performace on the
    PPC440 DDR controller. The 440er common DDR setup files (sdram.c &
    spd_sdram.c) are changed accordingly. So all 440er boards using
    these setup routines will automatically receive this performance
    increase.
    
    Please see below some benchmarks done by AMCC to demonstrate this
    performance changes:
    
    
    ----------------------------------------
    SDRAM0_CFG0[PMU] = 1 (U-boot default for Bamboo, Yosemite and Yellowstone)
    ----------------------------------------
    Stream benchmark results
    -------------------------------------------------------------
    This system uses 8 bytes per DOUBLE PRECISION word.
    -------------------------------------------------------------
    Array size = 2000000, Offset = 0
    Total memory required = 45.8 MB.
    Each test is run 10 times, but only
    the *best* time for each is used.
    -------------------------------------------------------------
    Your clock granularity/precision appears to be 1 microseconds.
    Each test below will take on the order of 112345 microseconds.
       (= 112345 clock ticks)
    Increase the size of the arrays if this shows that you are not getting
    at least 20 clock ticks per test.
    -------------------------------------------------------------
    WARNING -- The above is only a rough guideline.
    For best results, please be sure you know the precision of your system
    timer.
    -------------------------------------------------------------
    Function      Rate (MB/s)   RMS time     Min time     Max time
    Copy:         256.7683       0.1248       0.1246       0.1250
    Scale:        246.0157       0.1302       0.1301       0.1302
    Add:          255.0316       0.1883       0.1882       0.1885
    Triad:        253.1245       0.1897       0.1896       0.1899
    
    
    TTCP Benchmark Results
    ttcp-t: socket
    ttcp-t: connect
    ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5000  tcp  ->
    localhost
    ttcp-t: 16777216 bytes in 0.28 real seconds = 454.29 Mbit/sec +++
    ttcp-t: 2048 I/O calls, msec/call = 0.14, calls/sec = 7268.57
    ttcp-t: 0.0user 0.1sys 0:00real 60% 0i+0d 0maxrss 0+2pf 3+1506csw
    
    ----------------------------------------
    SDRAM0_CFG0[PMU] = 0 (Suggested modification)
    Setting PMU = 0 provides a noticeable performance improvement *2% to
    5% improvement in memory performance.
    *Improves the Mbit/sec for TTCP benchmark by almost 76%.
    ----------------------------------------
    Stream benchmark results
    -------------------------------------------------------------
    This system uses 8 bytes per DOUBLE PRECISION word.
    -------------------------------------------------------------
    Array size = 2000000, Offset = 0
    Total memory required = 45.8 MB.
    Each test is run 10 times, but only
    the *best* time for each is used.
    -------------------------------------------------------------
    Your clock granularity/precision appears to be 1 microseconds.
    Each test below will take on the order of 120066 microseconds.
       (= 120066 clock ticks)
    Increase the size of the arrays if this shows that you are not getting
    at least 20 clock ticks per test.
    -------------------------------------------------------------
    WARNING -- The above is only a rough guideline.
    For best results, please be sure you know the precision of your system
    timer.
    -------------------------------------------------------------
    Function      Rate (MB/s)   RMS time     Min time     Max time
    Copy:         262.5167       0.1221       0.1219       0.1223
    Scale:        258.4856       0.1238       0.1238       0.1240
    Add:          262.5404       0.1829       0.1828       0.1831
    Triad:        266.8594       0.1800       0.1799       0.1802
    
    TTCP Benchmark Results
    ttcp-t: socket
    ttcp-t: connect
    ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5000  tcp  ->
    localhost
    ttcp-t: 16777216 bytes in 0.16 real seconds = 804.06 Mbit/sec +++
    ttcp-t: 2048 I/O calls, msec/call = 0.08, calls/sec = 12864.89
    ttcp-t: 0.0user 0.0sys 0:00real 46% 0i+0d 0maxrss 0+2pf 120+1csw
    
    
    2006-07-28, Stefan Roese <sr@denx.de>