Changes between Version 13 and Version 14 of VirtualMemory

Timestamp:

Jun 29, 2009, 12:42:34 PM (15 years ago)

Author:

alain

Comment:

--

VirtualMemory

@@ -122 +122 @@
 === 2.1 Generic MMU activation ===
 
-After general RESET the generic MMU is desactivated : As long as the MMU is not activated, the 32 bits virtual address is simply extended to 40 bits,
- and directly used as a physical address. The instruction MMU and the data MMU can be separately activated by the software, by writing in
+After general RESET, both the L1 caches and the generic MMU are desactivated : As long as the MMU is not activated, the 32 bits virtual address is simply extended to 40 bits,
+and directly used as a physical address. As long as the caches are not activated, all access are handled as uncached by the cache controller.
+
+The instruction cache, the data cache, the instruction MMU and the data MMU can be separately activated by the software, by writing in the MMU_MODE register, using the
+MMU driver.
 
 === 2.2 Generic MMU exceptions ===
@@ -155 +158 @@
 ||                                         ||             ||                                                                         ||            ||
 || MMU_PTPR                    ||             || Page Table Pointer Register                       || R/W   ||
-|| MMU_TLB_EN               ||             || Data & Inst TLBs Mode Register                || R/W   ||
+|| MMU_MODE                 ||             || Data & Inst TLBs Mode Register                || R/W   ||
 || MMU_ICACHE_FLUSH   ||                    || Instruction Cache flush                          || W       ||
 || MMU_DCACHE_FLUSH ||              || Data Cache flush                                         || W       ||