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![]() 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 <haavard.skinnemoen@atmel.com> |
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.. | ||
arch-at32ap700x | ||
arch-common | ||
bitops.h | ||
byteorder.h | ||
config.h | ||
dma-mapping.h | ||
errno.h | ||
global_data.h | ||
hmatrix-common.h | ||
initcalls.h | ||
io.h | ||
posix_types.h | ||
processor.h | ||
ptrace.h | ||
sdram.h | ||
sections.h | ||
setup.h | ||
string.h | ||
sysreg.h | ||
types.h | ||
u-boot.h | ||
unaligned.h |