Dear Adam :

Thank you very much ! Now I have understand the IO MAPPING rules . All IO address mapping is only recognized by first 5 bits ,the last three bit is no mean for address(only for flags) . I mapping the S3C6410 GPIO ,Video-control ,Sfr once again . Now i can make the LCD bright and run the spectrum in real hardware . Thanks .

Best regards ~~

------------------------------ Message: 2 Date: Wed, 27 Feb 2013 22:13:47 +0100 From: Adam Lackorzynski adam@os.inf.tu-dresden.de To: l4-hackers@os.inf.tu-dresden.de Subject: Re: [ARM11] Question for the ARM 11 GPIO MAPPING Message-ID: 20130227211347.GA6841@os.inf.tu-dresden.de Content-Type: text/plain; charset=iso-8859-1 Hi, On Tue Feb 26, 2013 at 20:10:15 +0800, Jason.han wrote:

...

             Now I  have  GPIO Mapping  problems happened when

run the L4re in Arm 11 (6410 ).

            .devs ==> Res.mmio(0x7f008100, 0x7f00813f);
            .lcd.c ==>l4io_request_iomem(0x7f008100, 0x03f,

L4IO_MEM_NONCACHED, &lcd_gpio_virt_base);

             when

"l4_mem_write(lcd_gpio_virt_base+0x00,L4_MEM_WIDTH_4BYTE,0xaaaaaaaa); download in real-hw board : the core will died as it :

Ned: loading file: 'rom/arm-rv-lcd.cfg'

    hello   | Hello World!
    IO      | Dev_factory: register factory for N2Hw6DeviceE
    IO      | GTF: register factory for 7Pci_dev
    IO      | GTF: register factory for N2Hw12Msi_resourceE
    IO      | Dev_factory: register factory for N2Hw11Gpio_deviceE
    IO      | Io service
    IO      | Ready. Waiting for request.
    fbdrv   | Using LCD driver: S3C6410
    fbdrv   | lcd_control_virt_base is 0x3000
    fbdrv   | lcd_gpio_virt_base is 0x4000
    fbdrv   | Video memory is at virtual 0x5000 (size: 0x3fc00 Bytes)
    fbdrv   | Physical video memory is at 0x50394000   ==>core died

             after delete it and only use l4_mem_read , value always is

              IO       | Ready. Waiting for request.

    fbdrv   | Using LCD driver: S3C6410
    fbdrv   | lcd_control_virt_base is 0x3000
    fbdrv   | lcd_gpio_virt_base is 0x4000
    fbdrv   | Video memory is at virtual 0x5000 (size: 0x3fc00 Bytes)
    fbdrv   | Physical video memory is at 0x50395000
    fbdrv   | 0 value is 0x220022   ==> core run is ok.

    In the range of the GPIO  ,whatever I defined , the
    lcd_gpio_virt_base + offset (value 0) is always 0x220022 ,can't
    be written  .
    the lcd_gpio_virt_base + offset (value 0x04) is always 0x23 ,can
    be written ,but value never be changed .
     From Offset (value 0x08) is normal . why only GPIO like this ,I
    write some time and control -register always OK.

    Do you know Why , Can you give me some advices ? Thank you .

      I also try to .devs ==> Res.mmio(0x7f008000, 0x7f00813f);
                         .lcd.c ==>l4io_request_iomem(0x7f008000,
    0x03f, L4IO_MEM_NONCACHED, &lcd_gpio_virt_base);
                          when
    "l4_mem_write(lcd_gpio_virt_base+0x100,L4_MEM_WIDTH_4BYTE,0xaaaaaaaa);
    The offset 0x00 ,and 0x04 same problem ,but  now I can write
    0xaaaaaaaa for this IO port,  even though working not well .

What I notice is that you want to have 0x7f008100, however, mappings are page granular, i.e. lower 3 digits are 0. The output says the virt_base is 0x4000, so you probably want to access 0x4100. Maybe the device at offset 0 is behaving like what you're seeing.

Adam

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