On Tue, Apr 17, 2001 at 02:11:22PM -0300, Ralf Baechle wrote:
> Sane designs make sure that peripherals are at physical addresses of 512mb
> or less so can be addressed through KSEG1 without using TLB entries. So
> far the only violation of this rule are the Jazz systems.
In the setup.c file for the jazz board, is written:
add_wired_entry (0x02000017, 0x03c00017, 0xe0000000, PM_64K);
add_wired_entry (0x02400017, 0x02440017, 0xe2000000, PM_16M);
add_wired_entry (0x01800017, 0x01000017, 0xe4000000, PM_4M);
Why do these physical addresses which are all below 512MB need TLB entries?