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| author | Rob Herring <robh@kernel.org> | 2014-07-02 11:01:15 +0400 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2014-10-17 01:38:52 +0400 |
| commit | 836a24183273e9db1c092246bd8e306b297d9917 (patch) | |
| tree | 6a6d69be0fd2110c6b66d3a595aa5de59bdee69e /Documentation/arm | |
| parent | b615bbbff1c4d6fcd13007e75d75f6510aeb3808 (diff) | |
| download | linux-836a24183273e9db1c092246bd8e306b297d9917.tar.xz | |
ARM: expand fixmap region to 3MB
With commit a05e54c103b0 ("ARM: 8031/2: change fixmap mapping region to
support 32 CPUs"), the fixmap region was expanded to 2MB, but it
precluded any other uses of the fixmap region. In order to support other
uses the fixmap region needs to be expanded beyond 2MB. Fortunately, the
adjacent 1MB range 0xffe00000-0xfff00000 is availabe.
Remove fixmap_page_table ptr and lookup the page table via the virtual
address so that the fixmap region can span more that one pmd. The 2nd
pmd is already created since it is shared with the vector page.
Signed-off-by: Rob Herring <robh@kernel.org>
[kees: fixed CONFIG_DEBUG_HIGHMEM get_fixmap() calls]
[kees: moved pte allocation outside of CONFIG_HIGHMEM]
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Diffstat (limited to 'Documentation/arm')
| -rw-r--r-- | Documentation/arm/memory.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/arm/memory.txt b/Documentation/arm/memory.txt index 38dc06d0a791..4178ebda6e66 100644 --- a/Documentation/arm/memory.txt +++ b/Documentation/arm/memory.txt @@ -41,7 +41,7 @@ fffe8000 fffeffff DTCM mapping area for platforms with fffe0000 fffe7fff ITCM mapping area for platforms with ITCM mounted inside the CPU. -ffc00000 ffdfffff Fixmap mapping region. Addresses provided +ffc00000 ffefffff Fixmap mapping region. Addresses provided by fix_to_virt() will be located here. fee00000 feffffff Mapping of PCI I/O space. This is a static |