On Wed, Sep 17, 2008 at 9:43 PM, Misbah khan <[EMAIL PROTECTED]> wrote: > > 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);
Ah, this doesn't work. You can't just choose a region of ram and ioremap it. Besides, the base of RAM is already used by the interrupt vectors. If you need to allocate a region for DMA buffers, then take a look at dma_alloc_coherent(). If you just need to allocate some buffers, then just use kzalloc(). g. -- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
