Thanks for the quick reply. But I was wondering as to why I would have to map the physical address to the virtual address when I know that the string is permanently in the physical memory because its loaded into flash. Is there a way to directly read from the physical memory location? Also, do the functions ioremap() and readl(va) work when called from within a kernel module?
-- Veena Quoting Nobin Mathew <[EMAIL PROTECTED]>: > Hi, > If you know the physical address, then you get virtual address > from that physical adress by using ioremap(). > > Then you can use readl(virtualaddress) to read the string from there > > Nobin Mathew > > On 7/10/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > > > > -- > > Hey all, > > > > I know the physical address of a string which is loaded into flash memory. > I > > want to read the string at the known physical memory location from within a > > kernel module. I initially tried reading the "/dev/mem" file using open(), > > lseek() and read(). But I guess its not possible to call these functions > from a > > kernel module. > > > > Is there some way of reading the contents of this physical memory location > from > > within a kernel module? > > > > Thank You > > Veena > > - > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to [EMAIL PROTECTED] > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
