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authorJ. Bruce Fields <bfields@citi.umich.edu>2009-10-27 18:45:17 -0400
committerJ. Bruce Fields <bfields@citi.umich.edu>2009-10-27 18:45:17 -0400
commite343eb0d60f74547e0aeb5bd151105c2e6cfe588 (patch)
tree92586df0daf3298262a957640e5c86679c963f41 /Documentation/arm/tcm.txt
parentddc04fd4d5163aee9ebdb38a56c365b602e2b7b7 (diff)
parent012abeea669ea49636cf952d13298bb68654146a (diff)
Merge commit 'v2.6.32-rc5' into for-2.6.33
Diffstat (limited to 'Documentation/arm/tcm.txt')
-rw-r--r--Documentation/arm/tcm.txt10
1 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/arm/tcm.txt b/Documentation/arm/tcm.txt
index 074f4be6667f..77fd9376e6d7 100644
--- a/Documentation/arm/tcm.txt
+++ b/Documentation/arm/tcm.txt
@@ -29,11 +29,13 @@ TCM location and size. Notice that this is not a MMU table: you
29actually move the physical location of the TCM around. At the 29actually move the physical location of the TCM around. At the
30place you put it, it will mask any underlying RAM from the 30place you put it, it will mask any underlying RAM from the
31CPU so it is usually wise not to overlap any physical RAM with 31CPU so it is usually wise not to overlap any physical RAM with
32the TCM. The TCM memory exists totally outside the MMU and will 32the TCM.
33override any MMU mappings.
34 33
35Code executing inside the ITCM does not "see" any MMU mappings 34The TCM memory can then be remapped to another address again using
36and e.g. register accesses must be made to physical addresses. 35the MMU, but notice that the TCM if often used in situations where
36the MMU is turned off. To avoid confusion the current Linux
37implementation will map the TCM 1 to 1 from physical to virtual
38memory in the location specified by the machine.
37 39
38TCM is used for a few things: 40TCM is used for a few things:
39 41