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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-10-02 23:20:43 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-10-02 23:20:43 (GMT) |
| commit | a037a79dceaf717409fbf42f4ad209b9c15f435c (patch) | |
| tree | c30b5b033c74ab9470e875554bded16464bbdf9b /Documentation | |
| parent | 90d5ffc729e92bffc0f84e2447e2e6dc280240a5 (diff) | |
| parent | d25ef8b86e6a58f5476bf6e4a8da730b335f68fa (diff) | |
| download | linux-a037a79dceaf717409fbf42f4ad209b9c15f435c.tar.xz | |
Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm: (25 commits)
ARM: 5728/1: Proper prefetch abort handling on ARMv6 and ARMv7
ARM: 5727/1: Pass IFSR register to do_PrefetchAbort()
ARM: 5740/1: fix valid_phys_addr_range() range check
ARM: 5739/1: ARM: allow empty ATAG_CORE
ARM: 5735/1: sa1111: CodingStyle cleanups
ARM: 5738/1: Correct TCM documentation
ARM: 5734/1: arm: fix compilation of entry-common.S for older CPUs
ARM: 5733/1: fix bcmring compile error
ARM: 5732/1: remove redundant include file
ARM: 5731/2: Fix U300 generic GPIO, remove ifdefs from MMCI v3
ARM: Ensure do_cache_op takes mmap_sem
ARM: Fix __cpuexit section mismatch warnings
ARM: Don't allow highmem on SMP platforms without h/w TLB ops broadcast
ARM: includecheck fix: mach-davinci, board-dm365-evm.c
ARM: Remove unused CONFIG SA1100_H3XXX
ARM: Fix warning: unused variable 'highmem'
ARM: Fix warning: #warning syscall migrate_pages not implemented
ARM: Fix SA11x0 clocksource warning
ARM: Fix SA1100 Neponset serial section mismatch
ARM: Fix SA1100 Assabet/Neponset PCMCIA section mismatch warnings
...
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/arm/tcm.txt | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/arm/tcm.txt b/Documentation/arm/tcm.txt index 074f4be..77fd937 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 actually move the physical location of the TCM around. At the place you put it, it will mask any underlying RAM from the CPU so it is usually wise not to overlap any physical RAM with -the TCM. The TCM memory exists totally outside the MMU and will -override any MMU mappings. +the TCM. -Code executing inside the ITCM does not "see" any MMU mappings -and e.g. register accesses must be made to physical addresses. +The TCM memory can then be remapped to another address again using +the MMU, but notice that the TCM if often used in situations where +the MMU is turned off. To avoid confusion the current Linux +implementation will map the TCM 1 to 1 from physical to virtual +memory in the location specified by the machine. TCM is used for a few things: |