Re: [Qemu-devel] Help initializing a hw module

[Juan Antonio Moya Vicén]

I'm sorry I made a typo.

The code in the kernel module that makes the call REALLY IS:
         iobase = ioremap(0xFED40000, 0x5000);
         if(ioread8(iobase) == 0)
            return -ENODEV;



On 03/02/11 14:58, Juan Antonio Moya Vicén wrote:
> Hi list,
> I'm new to qemu, and developing a new hw module. And I'll appreciate any
> help or link any of you can provide relating to the following problem
> I'm experiencing, that I'm certain it is because of inexperience:
>
>
> I'm getting ENODEV error codes each time I load the kernel module for my
> specific device.
>
> ** I have a guest OS Linux. The hw I'm emulating is a stupid device,
> whose kernel module tries to find at a certain IO mem position: 0xFED40000
> The code in the kernel module that makes the call:
>          ioremap(0xFED40000, 0x5000);
>          if(ioread8(0xFED40000) == 0)
>             return -ENODEV;
>
> ** My device initialization code in qemu:
>
> static uint32_t my_access_read(void* opaque, target_phys_addr_t addr) {
>     return (uint32_t) 0xFF;
> }
> static CPUReadMemoryFunc* const my_access_read_str[3] = {
> my_access_read, NULL, NULL };
>
> void my_register_function(void) {
>         int addr = cpu_register_io_memory(my_access_read_str, NULL, s);
>         cpu_register_physical_memory(0xFED40000, 0x5000, addr);
> }
>
>
> ** I do know that Qemu is calling and executing "my_register_function()"
> ** I do know that the guest OS kernel module is executing the two lines
> I pasted before.
>
> But looks like "my_access_read()" function gets never called. Do you
> guys have any idea how to fix this mess?
> Thanks in advance
>
>
>   

-- 


*Juan Antonio Moya*

Scientific Developer, Securiforest
Sant Joan de La Salle 42, 4th floor
08022 Barcelona (Spain)
Email: address@hidden <mailto:address@hidden>
Web:   http://www.securiforest.com
        


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