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: j...@securiforest.com <mailto:j...@securiforest.com>
Web: http://www.securiforest.com
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