u-boot/board/atmel
Haavard Skinnemoen 1f36f73fe7 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 <haavard.skinnemoen@atmel.com>
2010-09-03 15:13:02 +02:00
..
at91cap9adk Write MAC address automatically on MACB-based boards 2010-07-12 00:14:29 -07:00
at91rm9200dk new at91_emac network driver (NET_MULTI api) 2010-01-31 22:37:12 -08:00
at91rm9200ek new at91_emac network driver (NET_MULTI api) 2010-01-31 22:37:12 -08:00
at91sam9m10g45ek Write MAC address automatically on MACB-based boards 2010-07-12 00:14:29 -07:00
at91sam9rlek ARM change name of defines for AT91 arm926ejs 2010-03-07 12:36:35 -06:00
at91sam9260ek Write MAC address automatically on MACB-based boards 2010-07-12 00:14:29 -07:00
at91sam9261ek ARM change name of defines for AT91 arm926ejs 2010-03-07 12:36:35 -06:00
at91sam9263ek Write MAC address automatically on MACB-based boards 2010-07-12 00:14:29 -07:00
atngw100 avr32: Add simple paging support 2010-09-03 15:13:02 +02:00
atstk1000 avr32: Add simple paging support 2010-09-03 15:13:02 +02:00