Hi all,
i am facing a problem regarding the usage of ioremap function which is
described as:-
1) I am remaping the SDRAM memory into three continews buffer as
ptr1 = (unsigned int *)ioremap(0x0001000,0x1000);
ptr2 = (unsigned int *)ioremap(0x0002000,0x1000);
ptr3 = (unsigned int *)ioremap(0x0003000,0x1000);
I am filling the data into the SDRAM buffer using these remap pointers
2) SDRAM is mmaped to user space into a buffer as
struct sdram_buf
{
unsigned int buf[4096];
};
struct sdram_buf sdram_buf_obj[3];
The mapping looks correct but it doesent work ... :(
If is do the ioremap like this it works
ptr1 = (unsigned int *)ioremap(0x0001000,(0x1000 * 4));
ptr2 = (unsigned int *)ioremap(0x0002000,(0x1000 * 4));
ptr3 = (unsigned int *)ioremap(0x0003000,(0x1000 * 4));
Doing this actually takes more space into the ram memory hence for
mapping
1 M of Ram memeoy it actually takes 4 MB practically.
Can any one point out the mistake or suggest something ...
--
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