From 1f36f73fe70560a2bd286a7abc8530fdc93af9ae Mon Sep 17 00:00:00 2001 From: Haavard Skinnemoen Date: Thu, 12 Aug 2010 13:52:54 +0700 Subject: avr32: Add simple paging support Use the MMU hardware to set up 1:1 mappings between physical and virtual addresses. This allows us to bypass the cache when accessing the flash without having to do any physical-to-virtual address mapping in the CFI driver. The virtual memory mappings are defined at compile time through a sorted array of virtual memory range objects. When a TLB miss exception happens, the exception handler does a binary search through the array until it finds a matching entry and loads it into the TLB. The u-boot image itself is covered by a fixed TLB entry which is never replaced. This makes the 'saveenv' command work again on ATNGW100 and other boards using the CFI driver, hopefully without breaking any rules. Signed-off-by: Haavard Skinnemoen --- include/configs/atstk1006.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/configs/atstk1006.h') diff --git a/include/configs/atstk1006.h b/include/configs/atstk1006.h index f93118edbc..d3cbee6b63 100644 --- a/include/configs/atstk1006.h +++ b/include/configs/atstk1006.h @@ -73,6 +73,9 @@ */ #define CONFIG_SYS_CLKDIV_PBB 1 +/* Reserve VM regions for SDRAM and NOR flash */ +#define CONFIG_SYS_NR_VM_REGIONS 2 + /* * The PLLOPT register controls the PLL like this: * icp = PLLOPT<2> -- cgit v1.2.1